From 484a9c516b6934ec61c659f5b07e6d68bde40dcc Mon Sep 17 00:00:00 2001
From: "Nicholas J. Kain" <nicholas@kain.us>
Date: Mon, 7 Mar 2022 20:42:00 -0500
Subject: [PATCH] Use stb_snprintf instead of libc snprintf.

This gives us consistent behavior and stb_snprintf is async signal
safe.
---
 cfg.c            | 1065 +++++++++++++-------------
 cfg.rl           |    9 +-
 duiaid.c         |    5 +-
 ifchange.c       |   24 +-
 ifchd-parse.c    |    6 +-
 ifchd-parse.rl   |    6 +-
 ifchd.c          |   14 +-
 leasefile.c      |    7 +-
 nk/exec.c        |   11 +-
 nk/stb_sprintf.c |    3 +
 nk/stb_sprintf.h | 1915 ++++++++++++++++++++++++++++++++++++++++++++++
 sockd.c          |    4 +-
 12 files changed, 2496 insertions(+), 573 deletions(-)
 create mode 100644 nk/stb_sprintf.c
 create mode 100644 nk/stb_sprintf.h

diff --git a/cfg.c b/cfg.c
index 7af690c..d5d4202 100644
--- a/cfg.c
+++ b/cfg.c
@@ -14,6 +14,7 @@
 #include "ndhc.h"
 #include "ifchd.h"
 #include "sockd.h"
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/privs.h"
 #include "nk/io.h"
@@ -21,7 +22,7 @@
 static void copy_cmdarg(char *dest, const char *src,
 size_t destlen, const char *argname)
 {
-	ssize_t olen = snprintf(dest, destlen, "%s", src);
+	ssize_t olen = stbsp_snprintf(dest, destlen, "%s", src);
 	if (olen < 0 || (size_t)olen > destlen)
 		suicide("snprintf failed on %s", argname);
 }
@@ -34,15 +35,15 @@ struct cfgparse {
 };
 
 
-#line 168 "cfg.rl"
+#line 169 "cfg.rl"
 
 
 
-#line 217 "cfg.rl"
+#line 218 "cfg.rl"
 
 
 
-#line 46 "cfg.c"
+#line 47 "cfg.c"
 static const int file_cfg_start = 1;
 static const int file_cfg_first_final = 291;
 static const int file_cfg_error = 0;
@@ -50,7 +51,7 @@ static const int file_cfg_error = 0;
 static const int file_cfg_en_main = 1;
 
 
-#line 219 "cfg.rl"
+#line 220 "cfg.rl"
 
 
 static void parse_cfgfile(const char *fname)
@@ -85,15 +86,15 @@ static void parse_cfgfile(const char *fname)
 				const char *p = l + lstart;
 				const char *pe = l + lstart + llen + 1;
 				
-#line 89 "cfg.c"
+#line 90 "cfg.c"
 				{
 					ccfg.cs = (int)file_cfg_start;
 				}
 				
-#line 252 "cfg.rl"
+#line 253 "cfg.rl"
 				
 				
-#line 97 "cfg.c"
+#line 98 "cfg.c"
 				{
 					switch ( ccfg.cs ) {
 						case 1:
@@ -729,16 +730,16 @@ static void parse_cfgfile(const char *fname)
 					goto _out0;
 					_ctr34:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 739 "cfg.c"
+#line 740 "cfg.c"
 					
 					{
-#line 127 "cfg.rl"
+#line 128 "cfg.rl"
 						
 						int t = atoi(ccfg.buf);
 						arp_probe_max = t;
@@ -749,21 +750,21 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 753 "cfg.c"
+#line 754 "cfg.c"
 					
 					goto _st291;
 					_ctr42:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 764 "cfg.c"
+#line 765 "cfg.c"
 					
 					{
-#line 118 "cfg.rl"
+#line 119 "cfg.rl"
 						
 						int t = atoi(ccfg.buf);
 						arp_probe_min = t;
@@ -774,96 +775,96 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 778 "cfg.c"
+#line 779 "cfg.c"
 					
 					goto _st291;
 					_ctr51:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 789 "cfg.c"
+#line 790 "cfg.c"
 					
 					{
-#line 113 "cfg.rl"
+#line 114 "cfg.rl"
 						
 						int t = atoi(ccfg.buf);
 						if (t >= 0)
 						arp_probe_num = t;
 					}
 					
-#line 799 "cfg.c"
+#line 800 "cfg.c"
 					
 					goto _st291;
 					_ctr61:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 810 "cfg.c"
+#line 811 "cfg.c"
 					
 					{
-#line 108 "cfg.rl"
+#line 109 "cfg.rl"
 						
 						int t = atoi(ccfg.buf);
 						if (t >= 0)
 						arp_probe_wait = t;
 					}
 					
-#line 820 "cfg.c"
+#line 821 "cfg.c"
 					
 					goto _st291;
 					_ctr74:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 831 "cfg.c"
+#line 832 "cfg.c"
 					
 					{
-#line 89 "cfg.rl"
+#line 90 "cfg.rl"
 						
 						copy_cmdarg(chroot_dir, ccfg.buf, sizeof chroot_dir, "chroot");
 					}
 					
-#line 839 "cfg.c"
+#line 840 "cfg.c"
 					
 					goto _st291;
 					_ctr87:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 850 "cfg.c"
+#line 851 "cfg.c"
 					
 					{
-#line 57 "cfg.rl"
+#line 58 "cfg.rl"
 						get_clientid_string(ccfg.buf, ccfg.buflen); }
 					
-#line 856 "cfg.c"
+#line 857 "cfg.c"
 					
 					goto _st291;
 					_ctr110:
 					{
-#line 55 "cfg.rl"
+#line 56 "cfg.rl"
 						ccfg.ternary = -1; }
 					
-#line 864 "cfg.c"
+#line 865 "cfg.c"
 					
 					{
-#line 151 "cfg.rl"
+#line 152 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: allow_hostname = 1; break;
@@ -871,18 +872,18 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 875 "cfg.c"
+#line 876 "cfg.c"
 					
 					goto _st291;
 					_ctr111:
 					{
-#line 54 "cfg.rl"
+#line 55 "cfg.rl"
 						ccfg.ternary = 1; }
 					
-#line 883 "cfg.c"
+#line 884 "cfg.c"
 					
 					{
-#line 151 "cfg.rl"
+#line 152 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: allow_hostname = 1; break;
@@ -890,21 +891,21 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 894 "cfg.c"
+#line 895 "cfg.c"
 					
 					goto _st291;
 					_ctr130:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 905 "cfg.c"
+#line 906 "cfg.c"
 					
 					{
-#line 136 "cfg.rl"
+#line 137 "cfg.rl"
 						
 						char *q;
 						long mt = strtol(ccfg.buf, &q, 10);
@@ -917,78 +918,78 @@ static void parse_cfgfile(const char *fname)
 						client_config.metric = (int)mt;
 					}
 					
-#line 921 "cfg.c"
+#line 922 "cfg.c"
 					
 					goto _st291;
 					_ctr144:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 932 "cfg.c"
+#line 933 "cfg.c"
 					
 					{
-#line 58 "cfg.rl"
+#line 59 "cfg.rl"
 						
 						copy_cmdarg(client_config.hostname, ccfg.buf,
 						sizeof client_config.hostname, "hostname");
 					}
 					
-#line 941 "cfg.c"
+#line 942 "cfg.c"
 					
 					goto _st291;
 					_ctr160:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 952 "cfg.c"
+#line 953 "cfg.c"
 					
 					{
-#line 81 "cfg.rl"
+#line 82 "cfg.rl"
 						
 						if (nk_uidgidbyname(ccfg.buf, &ifch_uid, &ifch_gid))
 						suicide("invalid ifch user '%s' specified", ccfg.buf);
 					}
 					
-#line 961 "cfg.c"
+#line 962 "cfg.c"
 					
 					goto _st291;
 					_ctr174:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 972 "cfg.c"
+#line 973 "cfg.c"
 					
 					{
-#line 62 "cfg.rl"
+#line 63 "cfg.rl"
 						
 						copy_cmdarg(client_config.interface, ccfg.buf,
 						sizeof client_config.interface, "interface");
 					}
 					
-#line 981 "cfg.c"
+#line 982 "cfg.c"
 					
 					goto _st291;
 					_ctr183:
 					{
-#line 55 "cfg.rl"
+#line 56 "cfg.rl"
 						ccfg.ternary = -1; }
 					
-#line 989 "cfg.c"
+#line 990 "cfg.c"
 					
 					{
-#line 66 "cfg.rl"
+#line 67 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: client_config.abort_if_no_lease = true; break;
@@ -996,18 +997,18 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 1000 "cfg.c"
+#line 1001 "cfg.c"
 					
 					goto _st291;
 					_ctr184:
 					{
-#line 54 "cfg.rl"
+#line 55 "cfg.rl"
 						ccfg.ternary = 1; }
 					
-#line 1008 "cfg.c"
+#line 1009 "cfg.c"
 					
 					{
-#line 66 "cfg.rl"
+#line 67 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: client_config.abort_if_no_lease = true; break;
@@ -1015,18 +1016,18 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 1019 "cfg.c"
+#line 1020 "cfg.c"
 					
 					goto _st291;
 					_ctr215:
 					{
-#line 55 "cfg.rl"
+#line 56 "cfg.rl"
 						ccfg.ternary = -1; }
 					
-#line 1027 "cfg.c"
+#line 1028 "cfg.c"
 					
 					{
-#line 102 "cfg.rl"
+#line 103 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: set_arp_relentless_def(true); break;
@@ -1034,18 +1035,18 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 1038 "cfg.c"
+#line 1039 "cfg.c"
 					
 					goto _st291;
 					_ctr216:
 					{
-#line 54 "cfg.rl"
+#line 55 "cfg.rl"
 						ccfg.ternary = 1; }
 					
-#line 1046 "cfg.c"
+#line 1047 "cfg.c"
 					
 					{
-#line 102 "cfg.rl"
+#line 103 "cfg.rl"
 						
 						switch (ccfg.ternary) {
 							case 1: set_arp_relentless_def(true); break;
@@ -1053,217 +1054,217 @@ static void parse_cfgfile(const char *fname)
 						}
 					}
 					
-#line 1057 "cfg.c"
+#line 1058 "cfg.c"
 					
 					goto _st291;
 					_ctr231:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1068 "cfg.c"
+#line 1069 "cfg.c"
 					
 					{
-#line 72 "cfg.rl"
+#line 73 "cfg.rl"
 						set_client_addr(ccfg.buf); }
 					
-#line 1074 "cfg.c"
+#line 1075 "cfg.c"
 					
 					goto _st291;
 					_ctr246:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1085 "cfg.c"
+#line 1086 "cfg.c"
 					
 					{
-#line 147 "cfg.rl"
+#line 148 "cfg.rl"
 						
 						copy_cmdarg(resolv_conf_d, ccfg.buf, sizeof resolv_conf_d,
 						"resolv-conf");
 					}
 					
-#line 1094 "cfg.c"
+#line 1095 "cfg.c"
 					
 					goto _st291;
 					_ctr261:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1105 "cfg.c"
+#line 1106 "cfg.c"
 					
 					{
-#line 157 "cfg.rl"
+#line 158 "cfg.rl"
 						
 						uint32_t t = (uint32_t)atoi(ccfg.buf);
 						client_config.rfkillIdx = t;
 						client_config.enable_rfkill = true;
 					}
 					
-#line 1115 "cfg.c"
+#line 1116 "cfg.c"
 					
 					goto _st291;
 					_ctr280:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1126 "cfg.c"
+#line 1127 "cfg.c"
 					
 					{
-#line 162 "cfg.rl"
+#line 163 "cfg.rl"
 						
 						client_config.s6_notify_fd = atoi(ccfg.buf);
 						client_config.enable_s6_notify = true;
 					}
 					
-#line 1135 "cfg.c"
+#line 1136 "cfg.c"
 					
 					goto _st291;
 					_ctr296:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1146 "cfg.c"
+#line 1147 "cfg.c"
 					
 					{
-#line 95 "cfg.rl"
+#line 96 "cfg.rl"
 						
 						copy_cmdarg(script_file, ccfg.buf, sizeof script_file, "script-file");
 					}
 					
-#line 1154 "cfg.c"
+#line 1155 "cfg.c"
 					
 					goto _st291;
 					_ctr316:
 					{
-#line 55 "cfg.rl"
+#line 56 "cfg.rl"
 						ccfg.ternary = -1; }
 					
-#line 1162 "cfg.c"
+#line 1163 "cfg.c"
 					
 					{
-#line 98 "cfg.rl"
+#line 99 "cfg.rl"
 						
 						log_line("seccomp_enforce option is deprecated; please remove it");
 						log_line("In the meanwhile, it is ignored and seccomp is disabled.");
 					}
 					
-#line 1171 "cfg.c"
+#line 1172 "cfg.c"
 					
 					goto _st291;
 					_ctr317:
 					{
-#line 54 "cfg.rl"
+#line 55 "cfg.rl"
 						ccfg.ternary = 1; }
 					
-#line 1179 "cfg.c"
+#line 1180 "cfg.c"
 					
 					{
-#line 98 "cfg.rl"
+#line 99 "cfg.rl"
 						
 						log_line("seccomp_enforce option is deprecated; please remove it");
 						log_line("In the meanwhile, it is ignored and seccomp is disabled.");
 					}
 					
-#line 1188 "cfg.c"
+#line 1189 "cfg.c"
 					
 					goto _st291;
 					_ctr336:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1199 "cfg.c"
+#line 1200 "cfg.c"
 					
 					{
-#line 85 "cfg.rl"
+#line 86 "cfg.rl"
 						
 						if (nk_uidgidbyname(ccfg.buf, &sockd_uid, &sockd_gid))
 						suicide("invalid sockd user '%s' specified", ccfg.buf);
 					}
 					
-#line 1208 "cfg.c"
+#line 1209 "cfg.c"
 					
 					goto _st291;
 					_ctr350:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1219 "cfg.c"
+#line 1220 "cfg.c"
 					
 					{
-#line 92 "cfg.rl"
+#line 93 "cfg.rl"
 						
 						copy_cmdarg(state_dir, ccfg.buf, sizeof state_dir, "state-dir");
 					}
 					
-#line 1227 "cfg.c"
+#line 1228 "cfg.c"
 					
 					goto _st291;
 					_ctr360:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1238 "cfg.c"
+#line 1239 "cfg.c"
 					
 					{
-#line 77 "cfg.rl"
+#line 78 "cfg.rl"
 						
 						if (nk_uidgidbyname(ccfg.buf, &ndhc_uid, &ndhc_gid))
 						suicide("invalid ndhc user '%s' specified", ccfg.buf);
 					}
 					
-#line 1247 "cfg.c"
+#line 1248 "cfg.c"
 					
 					goto _st291;
 					_ctr374:
 					{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf)
 						ccfg.buf[ccfg.buflen] = 0;
 					}
 					
-#line 1258 "cfg.c"
+#line 1259 "cfg.c"
 					
 					{
-#line 73 "cfg.rl"
+#line 74 "cfg.rl"
 						
 						copy_cmdarg(client_config.vendor, ccfg.buf,
 						sizeof client_config.vendor, "vendorid");
 					}
 					
-#line 1267 "cfg.c"
+#line 1268 "cfg.c"
 					
 					goto _st291;
 					_st291:
@@ -1429,17 +1430,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr30;
 					_ctr30:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1440 "cfg.c"
+#line 1441 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1447,12 +1448,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1451 "cfg.c"
+#line 1452 "cfg.c"
 					
 					goto _st16;
 					_ctr33:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1460,7 +1461,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1464 "cfg.c"
+#line 1465 "cfg.c"
 					
 					goto _st16;
 					_st16:
@@ -1474,17 +1475,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr33;
 					_ctr31:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1485 "cfg.c"
+#line 1486 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1492,7 +1493,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1496 "cfg.c"
+#line 1497 "cfg.c"
 					
 					goto _st17;
 					_st17:
@@ -1557,17 +1558,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr38;
 					_ctr38:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1568 "cfg.c"
+#line 1569 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1575,12 +1576,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1579 "cfg.c"
+#line 1580 "cfg.c"
 					
 					goto _st21;
 					_ctr41:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1588,7 +1589,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1592 "cfg.c"
+#line 1593 "cfg.c"
 					
 					goto _st21;
 					_st21:
@@ -1602,17 +1603,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr41;
 					_ctr39:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1613 "cfg.c"
+#line 1614 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1620,7 +1621,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1624 "cfg.c"
+#line 1625 "cfg.c"
 					
 					goto _st22;
 					_st22:
@@ -1694,17 +1695,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr47;
 					_ctr47:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1705 "cfg.c"
+#line 1706 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1712,12 +1713,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1716 "cfg.c"
+#line 1717 "cfg.c"
 					
 					goto _st27;
 					_ctr50:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1725,7 +1726,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1729 "cfg.c"
+#line 1730 "cfg.c"
 					
 					goto _st27;
 					_st27:
@@ -1739,17 +1740,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr50;
 					_ctr48:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1750 "cfg.c"
+#line 1751 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1757,7 +1758,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1761 "cfg.c"
+#line 1762 "cfg.c"
 					
 					goto _st28;
 					_st28:
@@ -1840,17 +1841,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr57;
 					_ctr57:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1851 "cfg.c"
+#line 1852 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1858,12 +1859,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1862 "cfg.c"
+#line 1863 "cfg.c"
 					
 					goto _st34;
 					_ctr60:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1871,7 +1872,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1875 "cfg.c"
+#line 1876 "cfg.c"
 					
 					goto _st34;
 					_st34:
@@ -1885,17 +1886,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr60;
 					_ctr58:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 1896 "cfg.c"
+#line 1897 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -1903,7 +1904,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 1907 "cfg.c"
+#line 1908 "cfg.c"
 					
 					goto _st35;
 					_st35:
@@ -2009,17 +2010,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr70;
 					_ctr70:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2020 "cfg.c"
+#line 2021 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2027,12 +2028,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2031 "cfg.c"
+#line 2032 "cfg.c"
 					
 					goto _st43;
 					_ctr73:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2040,7 +2041,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2044 "cfg.c"
+#line 2045 "cfg.c"
 					
 					goto _st43;
 					_st43:
@@ -2054,17 +2055,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr73;
 					_ctr71:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2065 "cfg.c"
+#line 2066 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2072,7 +2073,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2076 "cfg.c"
+#line 2077 "cfg.c"
 					
 					goto _st44;
 					_st44:
@@ -2182,17 +2183,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr83;
 					_ctr83:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2193 "cfg.c"
+#line 2194 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2200,12 +2201,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2204 "cfg.c"
+#line 2205 "cfg.c"
 					
 					goto _st53;
 					_ctr86:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2213,7 +2214,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2217 "cfg.c"
+#line 2218 "cfg.c"
 					
 					goto _st53;
 					_st53:
@@ -2227,17 +2228,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr86;
 					_ctr84:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2238 "cfg.c"
+#line 2239 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2245,7 +2246,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2249 "cfg.c"
+#line 2250 "cfg.c"
 					
 					goto _st54;
 					_st54:
@@ -2641,17 +2642,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr126;
 					_ctr126:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2652 "cfg.c"
+#line 2653 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2659,12 +2660,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2663 "cfg.c"
+#line 2664 "cfg.c"
 					
 					goto _st92;
 					_ctr129:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2672,7 +2673,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2676 "cfg.c"
+#line 2677 "cfg.c"
 					
 					goto _st92;
 					_st92:
@@ -2686,17 +2687,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr129;
 					_ctr127:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2697 "cfg.c"
+#line 2698 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2704,7 +2705,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2708 "cfg.c"
+#line 2709 "cfg.c"
 					
 					goto _st93;
 					_st93:
@@ -2823,17 +2824,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr140;
 					_ctr140:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2834 "cfg.c"
+#line 2835 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2841,12 +2842,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2845 "cfg.c"
+#line 2846 "cfg.c"
 					
 					goto _st103;
 					_ctr143:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2854,7 +2855,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2858 "cfg.c"
+#line 2859 "cfg.c"
 					
 					goto _st103;
 					_st103:
@@ -2868,17 +2869,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr143;
 					_ctr141:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 2879 "cfg.c"
+#line 2880 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -2886,7 +2887,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 2890 "cfg.c"
+#line 2891 "cfg.c"
 					
 					goto _st104;
 					_st104:
@@ -3019,17 +3020,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr156;
 					_ctr156:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3030 "cfg.c"
+#line 3031 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3037,12 +3038,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3041 "cfg.c"
+#line 3042 "cfg.c"
 					
 					goto _st115;
 					_ctr159:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3050,7 +3051,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3054 "cfg.c"
+#line 3055 "cfg.c"
 					
 					goto _st115;
 					_st115:
@@ -3064,17 +3065,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr159;
 					_ctr157:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3075 "cfg.c"
+#line 3076 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3082,7 +3083,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3086 "cfg.c"
+#line 3087 "cfg.c"
 					
 					goto _st116;
 					_st116:
@@ -3201,17 +3202,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr170;
 					_ctr170:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3212 "cfg.c"
+#line 3213 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3219,12 +3220,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3223 "cfg.c"
+#line 3224 "cfg.c"
 					
 					goto _st126;
 					_ctr173:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3232,7 +3233,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3236 "cfg.c"
+#line 3237 "cfg.c"
 					
 					goto _st126;
 					_st126:
@@ -3246,17 +3247,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr173;
 					_ctr171:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3257 "cfg.c"
+#line 3258 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3264,7 +3265,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3268 "cfg.c"
+#line 3269 "cfg.c"
 					
 					goto _st127;
 					_st127:
@@ -3788,17 +3789,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr227;
 					_ctr227:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3799 "cfg.c"
+#line 3800 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3806,12 +3807,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3810 "cfg.c"
+#line 3811 "cfg.c"
 					
 					goto _st175;
 					_ctr230:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3819,7 +3820,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3823 "cfg.c"
+#line 3824 "cfg.c"
 					
 					goto _st175;
 					_st175:
@@ -3833,17 +3834,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr230;
 					_ctr228:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3844 "cfg.c"
+#line 3845 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3851,7 +3852,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 3855 "cfg.c"
+#line 3856 "cfg.c"
 					
 					goto _st176;
 					_st176:
@@ -3979,17 +3980,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr242;
 					_ctr242:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 3990 "cfg.c"
+#line 3991 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -3997,12 +3998,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4001 "cfg.c"
+#line 4002 "cfg.c"
 					
 					goto _st187;
 					_ctr245:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4010,7 +4011,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4014 "cfg.c"
+#line 4015 "cfg.c"
 					
 					goto _st187;
 					_st187:
@@ -4024,17 +4025,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr245;
 					_ctr243:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4035 "cfg.c"
+#line 4036 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4042,7 +4043,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4046 "cfg.c"
+#line 4047 "cfg.c"
 					
 					goto _st188;
 					_st188:
@@ -4170,17 +4171,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr257;
 					_ctr257:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4181 "cfg.c"
+#line 4182 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4188,12 +4189,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4192 "cfg.c"
+#line 4193 "cfg.c"
 					
 					goto _st199;
 					_ctr260:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4201,7 +4202,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4205 "cfg.c"
+#line 4206 "cfg.c"
 					
 					goto _st199;
 					_st199:
@@ -4215,17 +4216,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr260;
 					_ctr258:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4226 "cfg.c"
+#line 4227 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4233,7 +4234,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4237 "cfg.c"
+#line 4238 "cfg.c"
 					
 					goto _st200;
 					_st200:
@@ -4375,17 +4376,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr276;
 					_ctr276:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4386 "cfg.c"
+#line 4387 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4393,12 +4394,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4397 "cfg.c"
+#line 4398 "cfg.c"
 					
 					goto _st211;
 					_ctr279:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4406,7 +4407,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4410 "cfg.c"
+#line 4411 "cfg.c"
 					
 					goto _st211;
 					_st211:
@@ -4420,17 +4421,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr279;
 					_ctr277:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4431 "cfg.c"
+#line 4432 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4438,7 +4439,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4442 "cfg.c"
+#line 4443 "cfg.c"
 					
 					goto _st212;
 					_st212:
@@ -4575,17 +4576,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr292;
 					_ctr292:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4586 "cfg.c"
+#line 4587 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4593,12 +4594,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4597 "cfg.c"
+#line 4598 "cfg.c"
 					
 					goto _st224;
 					_ctr295:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4606,7 +4607,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4610 "cfg.c"
+#line 4611 "cfg.c"
 					
 					goto _st224;
 					_st224:
@@ -4620,17 +4621,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr295;
 					_ctr293:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 4631 "cfg.c"
+#line 4632 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -4638,7 +4639,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 4642 "cfg.c"
+#line 4643 "cfg.c"
 					
 					goto _st225;
 					_st225:
@@ -5007,17 +5008,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr332;
 					_ctr332:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5018 "cfg.c"
+#line 5019 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5025,12 +5026,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5029 "cfg.c"
+#line 5030 "cfg.c"
 					
 					goto _st260;
 					_ctr335:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5038,7 +5039,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5042 "cfg.c"
+#line 5043 "cfg.c"
 					
 					goto _st260;
 					_st260:
@@ -5052,17 +5053,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr335;
 					_ctr333:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5063 "cfg.c"
+#line 5064 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5070,7 +5071,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5074 "cfg.c"
+#line 5075 "cfg.c"
 					
 					goto _st261;
 					_st261:
@@ -5189,17 +5190,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr346;
 					_ctr346:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5200 "cfg.c"
+#line 5201 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5207,12 +5208,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5211 "cfg.c"
+#line 5212 "cfg.c"
 					
 					goto _st271;
 					_ctr349:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5220,7 +5221,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5224 "cfg.c"
+#line 5225 "cfg.c"
 					
 					goto _st271;
 					_st271:
@@ -5234,17 +5235,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr349;
 					_ctr347:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5245 "cfg.c"
+#line 5246 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5252,7 +5253,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5256 "cfg.c"
+#line 5257 "cfg.c"
 					
 					goto _st272;
 					_st272:
@@ -5335,17 +5336,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr356;
 					_ctr356:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5346 "cfg.c"
+#line 5347 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5353,12 +5354,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5357 "cfg.c"
+#line 5358 "cfg.c"
 					
 					goto _st278;
 					_ctr359:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5366,7 +5367,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5370 "cfg.c"
+#line 5371 "cfg.c"
 					
 					goto _st278;
 					_st278:
@@ -5380,17 +5381,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr359;
 					_ctr357:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5391 "cfg.c"
+#line 5392 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5398,7 +5399,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5402 "cfg.c"
+#line 5403 "cfg.c"
 					
 					goto _st279;
 					_st279:
@@ -5517,17 +5518,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr370;
 					_ctr370:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5528 "cfg.c"
+#line 5529 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5535,12 +5536,12 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5539 "cfg.c"
+#line 5540 "cfg.c"
 					
 					goto _st289;
 					_ctr373:
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5548,7 +5549,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5552 "cfg.c"
+#line 5553 "cfg.c"
 					
 					goto _st289;
 					_st289:
@@ -5562,17 +5563,17 @@ static void parse_cfgfile(const char *fname)
 					goto _ctr373;
 					_ctr371:
 					{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 						
 						memset(&ccfg.buf, 0, sizeof ccfg.buf);
 						ccfg.buflen = 0;
 						ccfg.ternary = 0;
 					}
 					
-#line 5573 "cfg.c"
+#line 5574 "cfg.c"
 					
 					{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 						
 						if (ccfg.buflen < sizeof ccfg.buf - 1)
 						ccfg.buf[ccfg.buflen++] = *p;
@@ -5580,7 +5581,7 @@ static void parse_cfgfile(const char *fname)
 						suicide("line or option is too long");
 					}
 					
-#line 5584 "cfg.c"
+#line 5585 "cfg.c"
 					
 					goto _st290;
 					_st290:
@@ -5895,7 +5896,7 @@ static void parse_cfgfile(const char *fname)
 					_out: {}
 				}
 				
-#line 253 "cfg.rl"
+#line 254 "cfg.rl"
 				
 				
 				if (ccfg.cs == file_cfg_error)
@@ -5921,11 +5922,11 @@ static void parse_cfgfile(const char *fname)
 }
 
 
-#line 323 "cfg.rl"
+#line 324 "cfg.rl"
 
 
 
-#line 5929 "cfg.c"
+#line 5930 "cfg.c"
 static const int cmd_cfg_start = 248;
 static const int cmd_cfg_first_final = 248;
 static const int cmd_cfg_error = 0;
@@ -5933,7 +5934,7 @@ static const int cmd_cfg_error = 0;
 static const int cmd_cfg_en_main = 248;
 
 
-#line 325 "cfg.rl"
+#line 326 "cfg.rl"
 
 
 void parse_cmdline(int argc, char *argv[])
@@ -5943,10 +5944,10 @@ void parse_cmdline(int argc, char *argv[])
 	for (size_t i = 1; i < (size_t)argc; ++i) {
 		ssize_t snl;
 		if (i > 1)
-			snl = snprintf(argb + argbl, sizeof argb - argbl, "%c%s",
+			snl = stbsp_snprintf(argb + argbl, sizeof argb - argbl, "%c%s",
 		0, argv[i]);
 		else
-			snl = snprintf(argb + argbl, sizeof argb - argbl, "%s", argv[i]);
+			snl = stbsp_snprintf(argb + argbl, sizeof argb - argbl, "%s", argv[i]);
 		if (snl < 0 || (size_t)snl > sizeof argb)
 			suicide("error parsing command line option: option too long");
 		argbl += (size_t)snl;
@@ -5960,15 +5961,15 @@ void parse_cmdline(int argc, char *argv[])
 	const char *eof = pe;
 	
 	
-#line 5964 "cfg.c"
+#line 5965 "cfg.c"
 	{
 		ccfg.cs = (int)cmd_cfg_start;
 	}
 	
-#line 350 "cfg.rl"
+#line 351 "cfg.rl"
 	
 	
-#line 5972 "cfg.c"
+#line 5973 "cfg.c"
 	{
 		switch ( ccfg.cs ) {
 			case 248:
@@ -6474,16 +6475,16 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr58:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6484 "cfg.c"
+#line 6485 "cfg.c"
 		
 		{
-#line 127 "cfg.rl"
+#line 128 "cfg.rl"
 			
 			int t = atoi(ccfg.buf);
 			arp_probe_max = t;
@@ -6494,21 +6495,21 @@ void parse_cmdline(int argc, char *argv[])
 			}
 		}
 		
-#line 6498 "cfg.c"
+#line 6499 "cfg.c"
 		
 		goto _st248;
 		_ctr63:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6509 "cfg.c"
+#line 6510 "cfg.c"
 		
 		{
-#line 118 "cfg.rl"
+#line 119 "cfg.rl"
 			
 			int t = atoi(ccfg.buf);
 			arp_probe_min = t;
@@ -6519,116 +6520,116 @@ void parse_cmdline(int argc, char *argv[])
 			}
 		}
 		
-#line 6523 "cfg.c"
+#line 6524 "cfg.c"
 		
 		goto _st248;
 		_ctr69:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6534 "cfg.c"
+#line 6535 "cfg.c"
 		
 		{
-#line 113 "cfg.rl"
+#line 114 "cfg.rl"
 			
 			int t = atoi(ccfg.buf);
 			if (t >= 0)
 			arp_probe_num = t;
 		}
 		
-#line 6544 "cfg.c"
+#line 6545 "cfg.c"
 		
 		goto _st248;
 		_ctr76:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6555 "cfg.c"
+#line 6556 "cfg.c"
 		
 		{
-#line 108 "cfg.rl"
+#line 109 "cfg.rl"
 			
 			int t = atoi(ccfg.buf);
 			if (t >= 0)
 			arp_probe_wait = t;
 		}
 		
-#line 6565 "cfg.c"
+#line 6566 "cfg.c"
 		
 		goto _st248;
 		_ctr87:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6576 "cfg.c"
+#line 6577 "cfg.c"
 		
 		{
-#line 89 "cfg.rl"
+#line 90 "cfg.rl"
 			
 			copy_cmdarg(chroot_dir, ccfg.buf, sizeof chroot_dir, "chroot");
 		}
 		
-#line 6584 "cfg.c"
+#line 6585 "cfg.c"
 		
 		goto _st248;
 		_ctr97:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6595 "cfg.c"
+#line 6596 "cfg.c"
 		
 		{
-#line 57 "cfg.rl"
+#line 58 "cfg.rl"
 			get_clientid_string(ccfg.buf, ccfg.buflen); }
 		
-#line 6601 "cfg.c"
+#line 6602 "cfg.c"
 		
 		goto _st248;
 		_ctr105:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6612 "cfg.c"
+#line 6613 "cfg.c"
 		
 		{
-#line 282 "cfg.rl"
+#line 283 "cfg.rl"
 			parse_cfgfile(ccfg.buf); }
 		
-#line 6618 "cfg.c"
+#line 6619 "cfg.c"
 		
 		goto _st248;
 		_ctr133:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6629 "cfg.c"
+#line 6630 "cfg.c"
 		
 		{
-#line 136 "cfg.rl"
+#line 137 "cfg.rl"
 			
 			char *q;
 			long mt = strtol(ccfg.buf, &q, 10);
@@ -6641,259 +6642,259 @@ void parse_cmdline(int argc, char *argv[])
 			client_config.metric = (int)mt;
 		}
 		
-#line 6645 "cfg.c"
+#line 6646 "cfg.c"
 		
 		goto _st248;
 		_ctr137:
 		{
-#line 167 "cfg.rl"
+#line 168 "cfg.rl"
 			show_usage(); exit(EXIT_SUCCESS); }
 		
-#line 6653 "cfg.c"
+#line 6654 "cfg.c"
 		
 		goto _st248;
 		_ctr147:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6664 "cfg.c"
+#line 6665 "cfg.c"
 		
 		{
-#line 58 "cfg.rl"
+#line 59 "cfg.rl"
 			
 			copy_cmdarg(client_config.hostname, ccfg.buf,
 			sizeof client_config.hostname, "hostname");
 		}
 		
-#line 6673 "cfg.c"
+#line 6674 "cfg.c"
 		
 		goto _st248;
 		_ctr160:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6684 "cfg.c"
+#line 6685 "cfg.c"
 		
 		{
-#line 81 "cfg.rl"
+#line 82 "cfg.rl"
 			
 			if (nk_uidgidbyname(ccfg.buf, &ifch_uid, &ifch_gid))
 			suicide("invalid ifch user '%s' specified", ccfg.buf);
 		}
 		
-#line 6693 "cfg.c"
+#line 6694 "cfg.c"
 		
 		goto _st248;
 		_ctr171:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6704 "cfg.c"
+#line 6705 "cfg.c"
 		
 		{
-#line 62 "cfg.rl"
+#line 63 "cfg.rl"
 			
 			copy_cmdarg(client_config.interface, ccfg.buf,
 			sizeof client_config.interface, "interface");
 		}
 		
-#line 6713 "cfg.c"
+#line 6714 "cfg.c"
 		
 		goto _st248;
 		_ctr201:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6724 "cfg.c"
+#line 6725 "cfg.c"
 		
 		{
-#line 72 "cfg.rl"
+#line 73 "cfg.rl"
 			set_client_addr(ccfg.buf); }
 		
-#line 6730 "cfg.c"
+#line 6731 "cfg.c"
 		
 		goto _st248;
 		_ctr213:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6741 "cfg.c"
+#line 6742 "cfg.c"
 		
 		{
-#line 147 "cfg.rl"
+#line 148 "cfg.rl"
 			
 			copy_cmdarg(resolv_conf_d, ccfg.buf, sizeof resolv_conf_d,
 			"resolv-conf");
 		}
 		
-#line 6750 "cfg.c"
+#line 6751 "cfg.c"
 		
 		goto _st248;
 		_ctr225:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6761 "cfg.c"
+#line 6762 "cfg.c"
 		
 		{
-#line 157 "cfg.rl"
+#line 158 "cfg.rl"
 			
 			uint32_t t = (uint32_t)atoi(ccfg.buf);
 			client_config.rfkillIdx = t;
 			client_config.enable_rfkill = true;
 		}
 		
-#line 6771 "cfg.c"
+#line 6772 "cfg.c"
 		
 		goto _st248;
 		_ctr241:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6782 "cfg.c"
+#line 6783 "cfg.c"
 		
 		{
-#line 162 "cfg.rl"
+#line 163 "cfg.rl"
 			
 			client_config.s6_notify_fd = atoi(ccfg.buf);
 			client_config.enable_s6_notify = true;
 		}
 		
-#line 6791 "cfg.c"
+#line 6792 "cfg.c"
 		
 		goto _st248;
 		_ctr254:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6802 "cfg.c"
+#line 6803 "cfg.c"
 		
 		{
-#line 95 "cfg.rl"
+#line 96 "cfg.rl"
 			
 			copy_cmdarg(script_file, ccfg.buf, sizeof script_file, "script-file");
 		}
 		
-#line 6810 "cfg.c"
+#line 6811 "cfg.c"
 		
 		goto _st248;
 		_ctr279:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6821 "cfg.c"
+#line 6822 "cfg.c"
 		
 		{
-#line 85 "cfg.rl"
+#line 86 "cfg.rl"
 			
 			if (nk_uidgidbyname(ccfg.buf, &sockd_uid, &sockd_gid))
 			suicide("invalid sockd user '%s' specified", ccfg.buf);
 		}
 		
-#line 6830 "cfg.c"
+#line 6831 "cfg.c"
 		
 		goto _st248;
 		_ctr290:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6841 "cfg.c"
+#line 6842 "cfg.c"
 		
 		{
-#line 92 "cfg.rl"
+#line 93 "cfg.rl"
 			
 			copy_cmdarg(state_dir, ccfg.buf, sizeof state_dir, "state-dir");
 		}
 		
-#line 6849 "cfg.c"
+#line 6850 "cfg.c"
 		
 		goto _st248;
 		_ctr297:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6860 "cfg.c"
+#line 6861 "cfg.c"
 		
 		{
-#line 77 "cfg.rl"
+#line 78 "cfg.rl"
 			
 			if (nk_uidgidbyname(ccfg.buf, &ndhc_uid, &ndhc_gid))
 			suicide("invalid ndhc user '%s' specified", ccfg.buf);
 		}
 		
-#line 6869 "cfg.c"
+#line 6870 "cfg.c"
 		
 		goto _st248;
 		_ctr309:
 		{
-#line 50 "cfg.rl"
+#line 51 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf)
 			ccfg.buf[ccfg.buflen] = 0;
 		}
 		
-#line 6880 "cfg.c"
+#line 6881 "cfg.c"
 		
 		{
-#line 73 "cfg.rl"
+#line 74 "cfg.rl"
 			
 			copy_cmdarg(client_config.vendor, ccfg.buf,
 			sizeof client_config.vendor, "vendorid");
 		}
 		
-#line 6889 "cfg.c"
+#line 6890 "cfg.c"
 		
 		goto _st248;
 		_ctr313:
 		{
-#line 166 "cfg.rl"
+#line 167 "cfg.rl"
 			print_version(); exit(EXIT_SUCCESS); }
 		
-#line 6897 "cfg.c"
+#line 6898 "cfg.c"
 		
 		goto _st248;
 		_st248:
@@ -6918,10 +6919,10 @@ void parse_cmdline(int argc, char *argv[])
 		goto _out0;
 		_ctr316:
 		{
-#line 283 "cfg.rl"
+#line 284 "cfg.rl"
 			ccfg.ternary = 1; }
 		
-#line 6925 "cfg.c"
+#line 6926 "cfg.c"
 		
 		goto _st1;
 		_st1:
@@ -7291,17 +7292,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr55:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7302 "cfg.c"
+#line 7303 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7309,12 +7310,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7313 "cfg.c"
+#line 7314 "cfg.c"
 		
 		goto _st17;
 		_ctr57:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7322,7 +7323,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7326 "cfg.c"
+#line 7327 "cfg.c"
 		
 		goto _st17;
 		_st17:
@@ -7387,17 +7388,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr60:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7398 "cfg.c"
+#line 7399 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7405,12 +7406,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7409 "cfg.c"
+#line 7410 "cfg.c"
 		
 		goto _st21;
 		_ctr62:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7418,7 +7419,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7422 "cfg.c"
+#line 7423 "cfg.c"
 		
 		goto _st21;
 		_st21:
@@ -7498,17 +7499,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr66:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7509 "cfg.c"
+#line 7510 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7516,12 +7517,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7520 "cfg.c"
+#line 7521 "cfg.c"
 		
 		goto _st26;
 		_ctr68:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7529,7 +7530,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7533 "cfg.c"
+#line 7534 "cfg.c"
 		
 		goto _st26;
 		_st26:
@@ -7624,17 +7625,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr73:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7635 "cfg.c"
+#line 7636 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7642,12 +7643,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7646 "cfg.c"
+#line 7647 "cfg.c"
 		
 		goto _st32;
 		_ctr75:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7655,7 +7656,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7659 "cfg.c"
+#line 7660 "cfg.c"
 		
 		goto _st32;
 		_st32:
@@ -7788,17 +7789,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr84:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7799 "cfg.c"
+#line 7800 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7806,12 +7807,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7810 "cfg.c"
+#line 7811 "cfg.c"
 		
 		goto _st40;
 		_ctr86:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7819,7 +7820,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7823 "cfg.c"
+#line 7824 "cfg.c"
 		
 		goto _st40;
 		_st40:
@@ -7959,17 +7960,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr94:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 7970 "cfg.c"
+#line 7971 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7977,12 +7978,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7981 "cfg.c"
+#line 7982 "cfg.c"
 		
 		goto _st49;
 		_ctr96:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -7990,7 +7991,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 7994 "cfg.c"
+#line 7995 "cfg.c"
 		
 		goto _st49;
 		_st49:
@@ -8100,17 +8101,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr102:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 8111 "cfg.c"
+#line 8112 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8118,12 +8119,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8122 "cfg.c"
+#line 8123 "cfg.c"
 		
 		goto _st56;
 		_ctr104:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8131,7 +8132,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8135 "cfg.c"
+#line 8136 "cfg.c"
 		
 		goto _st56;
 		_st56:
@@ -8406,7 +8407,7 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr121:
 		{
-#line 151 "cfg.rl"
+#line 152 "cfg.rl"
 			
 			switch (ccfg.ternary) {
 				case 1: allow_hostname = 1; break;
@@ -8414,12 +8415,12 @@ void parse_cmdline(int argc, char *argv[])
 			}
 		}
 		
-#line 8418 "cfg.c"
+#line 8419 "cfg.c"
 		
 		goto _st249;
 		_ctr173:
 		{
-#line 66 "cfg.rl"
+#line 67 "cfg.rl"
 			
 			switch (ccfg.ternary) {
 				case 1: client_config.abort_if_no_lease = true; break;
@@ -8427,12 +8428,12 @@ void parse_cmdline(int argc, char *argv[])
 			}
 		}
 		
-#line 8431 "cfg.c"
+#line 8432 "cfg.c"
 		
 		goto _st249;
 		_ctr193:
 		{
-#line 102 "cfg.rl"
+#line 103 "cfg.rl"
 			
 			switch (ccfg.ternary) {
 				case 1: set_arp_relentless_def(true); break;
@@ -8440,26 +8441,26 @@ void parse_cmdline(int argc, char *argv[])
 			}
 		}
 		
-#line 8444 "cfg.c"
+#line 8445 "cfg.c"
 		
 		goto _st249;
 		_ctr267:
 		{
-#line 98 "cfg.rl"
+#line 99 "cfg.rl"
 			
 			log_line("seccomp_enforce option is deprecated; please remove it");
 			log_line("In the meanwhile, it is ignored and seccomp is disabled.");
 		}
 		
-#line 8455 "cfg.c"
+#line 8456 "cfg.c"
 		
 		goto _st249;
 		_ctr315:
 		{
-#line 283 "cfg.rl"
+#line 284 "cfg.rl"
 			ccfg.ternary = 1; }
 		
-#line 8463 "cfg.c"
+#line 8464 "cfg.c"
 		
 		goto _st249;
 		_st249:
@@ -8629,17 +8630,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr130:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 8640 "cfg.c"
+#line 8641 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8647,12 +8648,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8651 "cfg.c"
+#line 8652 "cfg.c"
 		
 		goto _st84;
 		_ctr132:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8660,7 +8661,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8664 "cfg.c"
+#line 8665 "cfg.c"
 		
 		goto _st84;
 		_st84:
@@ -8865,17 +8866,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr144:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 8876 "cfg.c"
+#line 8877 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8883,12 +8884,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8887 "cfg.c"
+#line 8888 "cfg.c"
 		
 		goto _st97;
 		_ctr146:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -8896,7 +8897,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 8900 "cfg.c"
+#line 8901 "cfg.c"
 		
 		goto _st97;
 		_st97:
@@ -9071,17 +9072,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr157:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 9082 "cfg.c"
+#line 9083 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9089,12 +9090,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9093 "cfg.c"
+#line 9094 "cfg.c"
 		
 		goto _st108;
 		_ctr159:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9102,7 +9103,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9106 "cfg.c"
+#line 9107 "cfg.c"
 		
 		goto _st108;
 		_st108:
@@ -9257,17 +9258,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr168:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 9268 "cfg.c"
+#line 9269 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9275,12 +9276,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9279 "cfg.c"
+#line 9280 "cfg.c"
 		
 		goto _st118;
 		_ctr170:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9288,7 +9289,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9292 "cfg.c"
+#line 9293 "cfg.c"
 		
 		goto _st118;
 		_st118:
@@ -9726,17 +9727,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr198:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 9737 "cfg.c"
+#line 9738 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9744,12 +9745,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9748 "cfg.c"
+#line 9749 "cfg.c"
 		
 		goto _st146;
 		_ctr200:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9757,7 +9758,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9761 "cfg.c"
+#line 9762 "cfg.c"
 		
 		goto _st146;
 		_st146:
@@ -9927,17 +9928,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr210:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 9938 "cfg.c"
+#line 9939 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9945,12 +9946,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9949 "cfg.c"
+#line 9950 "cfg.c"
 		
 		goto _st157;
 		_ctr212:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -9958,7 +9959,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 9962 "cfg.c"
+#line 9963 "cfg.c"
 		
 		goto _st157;
 		_st157:
@@ -10128,17 +10129,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr222:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 10139 "cfg.c"
+#line 10140 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10146,12 +10147,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10150 "cfg.c"
+#line 10151 "cfg.c"
 		
 		goto _st168;
 		_ctr224:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10159,7 +10160,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10163 "cfg.c"
+#line 10164 "cfg.c"
 		
 		goto _st168;
 		_st168:
@@ -10343,17 +10344,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr238:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 10354 "cfg.c"
+#line 10355 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10361,12 +10362,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10365 "cfg.c"
+#line 10366 "cfg.c"
 		
 		goto _st179;
 		_ctr240:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10374,7 +10375,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10378 "cfg.c"
+#line 10379 "cfg.c"
 		
 		goto _st179;
 		_st179:
@@ -10559,17 +10560,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr251:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 10570 "cfg.c"
+#line 10571 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10577,12 +10578,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10581 "cfg.c"
+#line 10582 "cfg.c"
 		
 		goto _st191;
 		_ctr253:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10590,7 +10591,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10594 "cfg.c"
+#line 10595 "cfg.c"
 		
 		goto _st191;
 		_st191:
@@ -10970,17 +10971,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr276:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 10981 "cfg.c"
+#line 10982 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -10988,12 +10989,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 10992 "cfg.c"
+#line 10993 "cfg.c"
 		
 		goto _st216;
 		_ctr278:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11001,7 +11002,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11005 "cfg.c"
+#line 11006 "cfg.c"
 		
 		goto _st216;
 		_st216:
@@ -11156,17 +11157,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr287:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 11167 "cfg.c"
+#line 11168 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11174,12 +11175,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11178 "cfg.c"
+#line 11179 "cfg.c"
 		
 		goto _st226;
 		_ctr289:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11187,7 +11188,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11191 "cfg.c"
+#line 11192 "cfg.c"
 		
 		goto _st226;
 		_st226:
@@ -11282,17 +11283,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr294:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 11293 "cfg.c"
+#line 11294 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11300,12 +11301,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11304 "cfg.c"
+#line 11305 "cfg.c"
 		
 		goto _st232;
 		_ctr296:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11313,7 +11314,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11317 "cfg.c"
+#line 11318 "cfg.c"
 		
 		goto _st232;
 		_st232:
@@ -11473,17 +11474,17 @@ void parse_cmdline(int argc, char *argv[])
 		}
 		_ctr306:
 		{
-#line 39 "cfg.rl"
+#line 40 "cfg.rl"
 			
 			memset(&ccfg.buf, 0, sizeof ccfg.buf);
 			ccfg.buflen = 0;
 			ccfg.ternary = 0;
 		}
 		
-#line 11484 "cfg.c"
+#line 11485 "cfg.c"
 		
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11491,12 +11492,12 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11495 "cfg.c"
+#line 11496 "cfg.c"
 		
 		goto _st242;
 		_ctr308:
 		{
-#line 44 "cfg.rl"
+#line 45 "cfg.rl"
 			
 			if (ccfg.buflen < sizeof ccfg.buf - 1)
 			ccfg.buf[ccfg.buflen++] = *p;
@@ -11504,7 +11505,7 @@ void parse_cmdline(int argc, char *argv[])
 			suicide("line or option is too long");
 		}
 		
-#line 11508 "cfg.c"
+#line 11509 "cfg.c"
 		
 		goto _st242;
 		_st242:
@@ -11850,7 +11851,7 @@ void parse_cmdline(int argc, char *argv[])
 		_out: {}
 	}
 	
-#line 351 "cfg.rl"
+#line 352 "cfg.rl"
 	
 	
 	if (ccfg.cs == cmd_cfg_error)
diff --git a/cfg.rl b/cfg.rl
index 770ce49..762b845 100644
--- a/cfg.rl
+++ b/cfg.rl
@@ -13,6 +13,7 @@
 #include "ndhc.h"
 #include "ifchd.h"
 #include "sockd.h"
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/privs.h"
 #include "nk/io.h"
@@ -20,7 +21,7 @@
 static void copy_cmdarg(char *dest, const char *src,
                         size_t destlen, const char *argname)
 {
-    ssize_t olen = snprintf(dest, destlen, "%s", src);
+    ssize_t olen = stbsp_snprintf(dest, destlen, "%s", src);
     if (olen < 0 || (size_t)olen > destlen)
         suicide("snprintf failed on %s", argname);
 }
@@ -331,10 +332,10 @@ void parse_cmdline(int argc, char *argv[])
     for (size_t i = 1; i < (size_t)argc; ++i) {
         ssize_t snl;
         if (i > 1)
-            snl = snprintf(argb + argbl, sizeof argb - argbl, "%c%s",
-                           0, argv[i]);
+            snl = stbsp_snprintf(argb + argbl, sizeof argb - argbl, "%c%s",
+                                 0, argv[i]);
         else
-            snl = snprintf(argb + argbl, sizeof argb - argbl, "%s", argv[i]);
+            snl = stbsp_snprintf(argb + argbl, sizeof argb - argbl, "%s", argv[i]);
         if (snl < 0 || (size_t)snl > sizeof argb)
             suicide("error parsing command line option: option too long");
         argbl += (size_t)snl;
diff --git a/duiaid.c b/duiaid.c
index 3363c82..7e4b970 100644
--- a/duiaid.c
+++ b/duiaid.c
@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <limits.h>
 #include <errno.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/random.h"
 #include "nk/io.h"
@@ -18,7 +19,7 @@
 
 static void get_duid_path(char *duidfile, size_t dlen)
 {
-    int splen = snprintf(duidfile, dlen, "%s/DUID", state_dir);
+    int splen = stbsp_snprintf(duidfile, dlen, "%s/DUID", state_dir);
     if (splen < 0 || (size_t)splen > dlen)
         suicide("%s: snprintf failed; return=%d", __func__, splen);
 }
@@ -29,7 +30,7 @@ static void get_iaid_path(char *iaidfile, size_t ilen,
     if (hwaddrlen != 6)
         suicide("%s: Hardware address length=%zu != 6 bytes",
                 __func__, hwaddrlen);
-    int splen = snprintf
+    int splen = stbsp_snprintf
         (iaidfile, ilen,
          "%s/IAID-%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
          state_dir, hwaddr[0], hwaddr[1], hwaddr[2],
diff --git a/ifchange.c b/ifchange.c
index 655669d..5cfeb44 100644
--- a/ifchange.c
+++ b/ifchange.c
@@ -9,9 +9,9 @@
 #include <sys/types.h>
 #include <errno.h>
 #include <limits.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/io.h"
-
 #include "options.h"
 #include "ndhc.h"
 #include "dhcp.h"
@@ -40,8 +40,8 @@ static int ifcmd_raw(char *buf, size_t buflen, const char *optname,
         return -1;
     }
     int ioptlen = (int)optlen;
-    ssize_t olen = snprintf(buf, buflen, "%s:%.*s;",
-                            optname, ioptlen, optdata);
+    ssize_t olen = stbsp_snprintf(buf, buflen, "%s:%.*s;",
+                                  optname, ioptlen, optdata);
     if (olen < 0 || (size_t)olen > buflen) {
         log_line("%s: (%s) '%s' option would truncate, so it was dropped.",
                  client_config.interface, __func__, optname);
@@ -64,7 +64,7 @@ static int ifcmd_u8(char *buf, size_t buflen, const char *optname,
         return -1;
     char numbuf[16];
     uint8_t c = optdata[0];
-    ssize_t olen = snprintf(numbuf, sizeof numbuf, "%c", c);
+    ssize_t olen = stbsp_snprintf(numbuf, sizeof numbuf, "%c", c);
     if (olen < 0 || (size_t)olen > sizeof numbuf)
         return -1;
     return ifcmd_raw(buf, buflen, optname, numbuf, strlen(numbuf));
@@ -79,7 +79,7 @@ static int ifcmd_u16(char *buf, size_t buflen, const char *optname,
     uint16_t v;
     memcpy(&v, optdata, 2);
     v = ntohs(v);
-    ssize_t olen = snprintf(numbuf, sizeof numbuf, "%hu", v);
+    ssize_t olen = stbsp_snprintf(numbuf, sizeof numbuf, "%hu", v);
     if (olen < 0 || (size_t)olen > sizeof numbuf)
         return -1;
     return ifcmd_raw(buf, buflen, optname, numbuf, strlen(numbuf));
@@ -94,7 +94,7 @@ static int ifcmd_s32(char *buf, size_t buflen, const char *optname,
     uint32_t v;
     memcpy(&v, optdata, 4);
     v = ntohl(v);
-    ssize_t olen = snprintf(numbuf, sizeof numbuf, "%d", v);
+    ssize_t olen = stbsp_snprintf(numbuf, sizeof numbuf, "%d", v);
     if (olen < 0 || (size_t)olen > sizeof numbuf)
         return -1;
     return ifcmd_raw(buf, buflen, optname, numbuf, strlen(numbuf));
@@ -122,14 +122,14 @@ static int ifcmd_iplist(char *out, size_t outlen, const char *optname,
         return -1;
 
     inet_ntop(AF_INET, optdata + optoff, ipbuf, sizeof ipbuf);
-    ssize_t wc = snprintf(buf + bufoff, sizeof buf, "%s", ipbuf);
+    ssize_t wc = stbsp_snprintf(buf + bufoff, sizeof buf, "%s", ipbuf);
     if (wc < 0 || (size_t)wc > sizeof buf)
         return -1;
     optoff += 4;
     bufoff += (size_t)wc;
     while (optlen >= 4 + optoff) {
         inet_ntop(AF_INET, optdata + optoff, ipbuf, sizeof ipbuf);
-        wc = snprintf(buf + bufoff, sizeof buf, ",%s", ipbuf);
+        wc = stbsp_snprintf(buf + bufoff, sizeof buf, ",%s", ipbuf);
         if (wc < 0 || (size_t)wc > sizeof buf)
             return -1;
         optoff += 4;
@@ -194,7 +194,7 @@ static int ifchwrite(const char *buf, size_t count)
 bool ifchange_carrier_isup(void)
 {
     char buf[256];
-    snprintf(buf, sizeof buf, "carrier:;");
+    stbsp_snprintf(buf, sizeof buf, "carrier:;");
     return ifchwrite(buf, strlen(buf)) == 0;
 }
 
@@ -206,7 +206,7 @@ int ifchange_deconfig(struct client_state_t *cs)
     if (cs->ifDeconfig)
         return 0;
 
-    snprintf(buf, sizeof buf, "ip4:0.0.0.0,255.255.255.255;");
+    stbsp_snprintf(buf, sizeof buf, "ip4:0.0.0.0,255.255.255.255;");
     log_line("%s: Resetting IP configuration.", client_config.interface);
     ret = ifchwrite(buf, strlen(buf));
 
@@ -266,9 +266,9 @@ static size_t send_client_ip(char *out, size_t olen,
 
     int snlen;
     if (have_bcast) {
-        snlen = snprintf(out, olen, "ip4:%s,%s,%s;", ip, sn, bc);
+        snlen = stbsp_snprintf(out, olen, "ip4:%s,%s,%s;", ip, sn, bc);
     } else {
-        snlen = snprintf(out, olen, "ip4:%s,%s;", ip, sn);
+        snlen = stbsp_snprintf(out, olen, "ip4:%s,%s;", ip, sn);
     }
     if (snlen < 0 || (size_t)snlen > olen) {
         log_line("%s: (%s) ip4 command would truncate so it was dropped.",
diff --git a/ifchd-parse.c b/ifchd-parse.c
index 127668b..ddc4416 100644
--- a/ifchd-parse.c
+++ b/ifchd-parse.c
@@ -6,8 +6,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <arpa/inet.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
-
 #include "ifchd-parse.h"
 #include "ifchd.h"
 #include "ifset.h"
@@ -1187,7 +1187,7 @@ int execute_buffer(const char *newbuf)
 	char tb[MAX_BUF];
 	int cmdf = 0;
 	
-	ssize_t buflen = snprintf(buf, sizeof buf, "%s%s", cl.ibuf, newbuf);
+	ssize_t buflen = stbsp_snprintf(buf, sizeof buf, "%s%s", cl.ibuf, newbuf);
 	memset(cl.ibuf, 0, sizeof cl.ibuf);
 	if (buflen < 0 || (size_t)buflen > sizeof buf) {
 		log_line("%s: (%s) snprintf1 failed", client_config.interface, __func__);
@@ -3256,7 +3256,7 @@ int execute_buffer(const char *newbuf)
 	}
 	
 	if (cmd_start != pe) {
-		ssize_t ilen = snprintf(cl.ibuf, sizeof cl.ibuf, "%s", cmd_start);
+		ssize_t ilen = stbsp_snprintf(cl.ibuf, sizeof cl.ibuf, "%s", cmd_start);
 		if (ilen < 0 || (size_t)ilen > sizeof buf) {
 			log_line("%s: (%s) snprintf2 failed", client_config.interface, __func__);
 			return -99;
diff --git a/ifchd-parse.rl b/ifchd-parse.rl
index 2b1681f..860fe32 100644
--- a/ifchd-parse.rl
+++ b/ifchd-parse.rl
@@ -5,8 +5,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <arpa/inet.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
-
 #include "ifchd-parse.h"
 #include "ifchd.h"
 #include "ifset.h"
@@ -171,7 +171,7 @@ int execute_buffer(const char *newbuf)
     char tb[MAX_BUF];
     int cmdf = 0;
 
-    ssize_t buflen = snprintf(buf, sizeof buf, "%s%s", cl.ibuf, newbuf);
+    ssize_t buflen = stbsp_snprintf(buf, sizeof buf, "%s%s", cl.ibuf, newbuf);
     memset(cl.ibuf, 0, sizeof cl.ibuf);
     if (buflen < 0 || (size_t)buflen > sizeof buf) {
         log_line("%s: (%s) snprintf1 failed", client_config.interface, __func__);
@@ -195,7 +195,7 @@ int execute_buffer(const char *newbuf)
     }
 
     if (cmd_start != pe) {
-        ssize_t ilen = snprintf(cl.ibuf, sizeof cl.ibuf, "%s", cmd_start);
+        ssize_t ilen = stbsp_snprintf(cl.ibuf, sizeof cl.ibuf, "%s", cmd_start);
         if (ilen < 0 || (size_t)ilen > sizeof buf) {
             log_line("%s: (%s) snprintf2 failed", client_config.interface, __func__);
             return -99;
diff --git a/ifchd.c b/ifchd.c
index fddac7a..3f1cd11 100644
--- a/ifchd.c
+++ b/ifchd.c
@@ -14,10 +14,10 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <errno.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/privs.h"
 #include "nk/io.h"
-
 #include "ifchd.h"
 #include "ndhc.h"
 #include "ifchd-parse.h"
@@ -103,7 +103,7 @@ static int write_resolve_conf(void)
             q = strchr(p, '\0');
         else
             *q++ = '\0';
-        ssize_t sl = snprintf(buf, sizeof buf, "%s", p);
+        ssize_t sl = stbsp_snprintf(buf, sizeof buf, "%s", p);
         if (sl < 0 || (size_t)sl > sizeof buf) {
             log_line("%s: (%s) snprintf failed appending nameservers",
                      client_config.interface, __func__);
@@ -124,7 +124,7 @@ static int write_resolve_conf(void)
             q = strchr(p, '\0');
         else
             *q++ = '\0';
-        ssize_t sl = snprintf(buf, sizeof buf, "%s", p);
+        ssize_t sl = stbsp_snprintf(buf, sizeof buf, "%s", p);
         if (sl < 0 || (size_t)sl > sizeof buf) {
             log_line("%s: (%s) snprintf failed appending domains",
                      client_config.interface, __func__);
@@ -190,7 +190,7 @@ int perform_dns(const char *str, size_t len)
         log_line("DNS server list is too long: %zu > %zu", len, sizeof cl.namesvrs);
         return ret;
     }
-    ssize_t sl = snprintf(cl.namesvrs, sizeof cl.namesvrs, "%s", str);
+    ssize_t sl = stbsp_snprintf(cl.namesvrs, sizeof cl.namesvrs, "%s", str);
     if (sl < 0 || (size_t)sl > sizeof cl.namesvrs) {
         log_line("%s: (%s) snprintf failed", client_config.interface, __func__);
     }
@@ -231,7 +231,7 @@ int perform_domain(const char *str, size_t len)
         log_line("DNS domain list is too long: %zu > %zu", len, sizeof cl.namesvrs);
         return ret;
     }
-    ssize_t sl = snprintf(cl.domains, sizeof cl.domains, "%s", str);
+    ssize_t sl = stbsp_snprintf(cl.domains, sizeof cl.domains, "%s", str);
     if (sl < 0 || (size_t)sl > sizeof cl.domains) {
         log_line("%s: (%s) snprintf failed", client_config.interface, __func__);
     }
@@ -345,13 +345,13 @@ static void setup_resolv_conf(void)
         }
         char buf[PATH_MAX];
 
-        ssize_t sl = snprintf(buf, sizeof buf, "%s.head", resolv_conf_d);
+        ssize_t sl = stbsp_snprintf(buf, sizeof buf, "%s.head", resolv_conf_d);
         if (sl < 0 || (size_t)sl > sizeof buf)
             log_line("snprintf failed appending resolv_conf_head; path too long?");
         else
             resolv_conf_head_fd = open(buf, O_RDONLY|O_CLOEXEC, 0);
 
-        sl = snprintf(buf, sizeof buf, "%s.tail", resolv_conf_d);
+        sl = stbsp_snprintf(buf, sizeof buf, "%s.tail", resolv_conf_d);
         if (sl < 0 || (size_t)sl > sizeof buf)
             log_line("snprintf failed appending resolv_conf_tail; path too long?");
         else
diff --git a/leasefile.c b/leasefile.c
index 0178e00..991f819 100644
--- a/leasefile.c
+++ b/leasefile.c
@@ -11,6 +11,7 @@
 #include <arpa/inet.h>
 #include <errno.h>
 #include <limits.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/io.h"
 #include "leasefile.h"
@@ -21,8 +22,8 @@ static int leasefilefd = -1;
 
 static void get_leasefile_path(char *leasefile, size_t dlen, char *ifname)
 {
-    int splen = snprintf(leasefile, dlen, "%s/LEASE-%s",
-                         state_dir, ifname);
+    int splen = stbsp_snprintf(leasefile, dlen, "%s/LEASE-%s",
+                               state_dir, ifname);
     if (splen < 0 || (size_t)splen > dlen)
         suicide("%s: (%s) snprintf failed; return=%d",
                 client_config.interface, __func__, splen);
@@ -48,7 +49,7 @@ static void do_write_leasefile(struct in_addr ipnum)
         return;
     }
     inet_ntop(AF_INET, &ipnum, ip, sizeof ip);
-    ssize_t olen = snprintf(out, sizeof out, "%s\n", ip);
+    ssize_t olen = stbsp_snprintf(out, sizeof out, "%s\n", ip);
     if (olen < 0 || (size_t)olen > sizeof ip) {
         log_line("%s: (%s) snprintf failed; return=%zd",
                  client_config.interface, __func__, olen);
diff --git a/nk/exec.c b/nk/exec.c
index 9057702..1d62574 100644
--- a/nk/exec.c
+++ b/nk/exec.c
@@ -9,13 +9,14 @@
 #include <errno.h>
 #include <limits.h>
 #include <pwd.h>
+#include "nk/stb_sprintf.h"
 #include "nk/exec.h"
 #include "nk/io.h"
 
 /*
- * Note that neither nk_generate_env or nk_execute are async signal safe, so
- * these functions should only be called after fork() in a non-multithreaded
- * process.
+ * Note that nk_generate_env is not async signal safe if chroot_path is not
+ * NULL, so it should only be called after fork() in a non-multithreaded
+ * process if chroot_path is ever non-NULL.
  *
  * I don't consider this to be a problem in general, since in a multithreaded process
  * it would be far better to fork off a subprocess early on before threads are
@@ -31,7 +32,7 @@
 
 #define NK_GEN_ENV(GEN_STR, ...) do { \
         if (env_offset >= envlen) return -3; \
-        ssize_t snlen = snprintf(envbuf, envbuflen, GEN_STR, __VA_ARGS__); \
+        ssize_t snlen = stbsp_snprintf(envbuf, envbuflen, GEN_STR, __VA_ARGS__); \
         if (snlen < 0 || (size_t)snlen > envbuflen) return -2; \
         xe->env[env_offset++] = envbuf; envbuf += snlen; envbuflen -= (size_t)snlen; \
     } while (0)
@@ -117,7 +118,7 @@ void nk_generate_env_print_error(int err)
 #undef ERRSTR6
 
 #define NK_GEN_ARG(GEN_STR, ...) do { \
-        ssize_t snlen = snprintf(argbuf, argbuflen, GEN_STR, __VA_ARGS__); \
+        ssize_t snlen = stbsp_snprintf(argbuf, argbuflen, GEN_STR, __VA_ARGS__); \
         if (snlen < 0 || (size_t)snlen > argbuflen) { \
             static const char errstr[] = "nk_execute: constructing argument list failed\n"; \
             safe_write(STDERR_FILENO, errstr, sizeof errstr); \
diff --git a/nk/stb_sprintf.c b/nk/stb_sprintf.c
new file mode 100644
index 0000000..d234a55
--- /dev/null
+++ b/nk/stb_sprintf.c
@@ -0,0 +1,3 @@
+#define STB_SPRINTF_IMPLEMENTATION
+#define STB_SPRINTF_NOFLOAT
+#include "stb_sprintf.h"
diff --git a/nk/stb_sprintf.h b/nk/stb_sprintf.h
new file mode 100644
index 0000000..fd09e3f
--- /dev/null
+++ b/nk/stb_sprintf.h
@@ -0,0 +1,1915 @@
+// stb_sprintf - v1.10 - public domain snprintf() implementation
+// originally by Jeff Roberts / RAD Game Tools, 2015/10/20
+// http://github.com/nothings/stb
+//
+// allowed types:  sc uidBboXx p AaGgEef n
+// lengths      :  hh h ll j z t I64 I32 I
+//
+// Contributors:
+//    Fabian "ryg" Giesen (reformatting)
+//    github:aganm (attribute format)
+//
+// Contributors (bugfixes):
+//    github:d26435
+//    github:trex78
+//    github:account-login
+//    Jari Komppa (SI suffixes)
+//    Rohit Nirmal
+//    Marcin Wojdyr
+//    Leonard Ritter
+//    Stefano Zanotti
+//    Adam Allison
+//    Arvid Gerstmann
+//    Markus Kolb
+//
+// LICENSE:
+//
+//   See end of file for license information.
+
+#ifndef STB_SPRINTF_H_INCLUDE
+#define STB_SPRINTF_H_INCLUDE
+
+/*
+Single file sprintf replacement.
+
+Originally written by Jeff Roberts at RAD Game Tools - 2015/10/20.
+Hereby placed in public domain.
+
+This is a full sprintf replacement that supports everything that
+the C runtime sprintfs support, including float/double, 64-bit integers,
+hex floats, field parameters (%*.*d stuff), length reads backs, etc.
+
+Why would you need this if sprintf already exists?  Well, first off,
+it's *much* faster (see below). It's also much smaller than the CRT
+versions code-space-wise. We've also added some simple improvements
+that are super handy (commas in thousands, callbacks at buffer full,
+for example). Finally, the format strings for MSVC and GCC differ
+for 64-bit integers (among other small things), so this lets you use
+the same format strings in cross platform code.
+
+It uses the standard single file trick of being both the header file
+and the source itself. If you just include it normally, you just get
+the header file function definitions. To get the code, you include
+it from a C or C++ file and define STB_SPRINTF_IMPLEMENTATION first.
+
+It only uses va_args macros from the C runtime to do it's work. It
+does cast doubles to S64s and shifts and divides U64s, which does
+drag in CRT code on most platforms.
+
+It compiles to roughly 8K with float support, and 4K without.
+As a comparison, when using MSVC static libs, calling sprintf drags
+in 16K.
+
+API:
+====
+int stbsp_sprintf( char * buf, char const * fmt, ... )
+int stbsp_snprintf( char * buf, int count, char const * fmt, ... )
+  Convert an arg list into a buffer.  stbsp_snprintf always returns
+  a zero-terminated string (unlike regular snprintf).
+
+int stbsp_vsprintf( char * buf, char const * fmt, va_list va )
+int stbsp_vsnprintf( char * buf, int count, char const * fmt, va_list va )
+  Convert a va_list arg list into a buffer.  stbsp_vsnprintf always returns
+  a zero-terminated string (unlike regular snprintf).
+
+int stbsp_vsprintfcb( STBSP_SPRINTFCB * callback, void * user, char * buf, char const * fmt, va_list va )
+    typedef char * STBSP_SPRINTFCB( char const * buf, void * user, int len );
+  Convert into a buffer, calling back every STB_SPRINTF_MIN chars.
+  Your callback can then copy the chars out, print them or whatever.
+  This function is actually the workhorse for everything else.
+  The buffer you pass in must hold at least STB_SPRINTF_MIN characters.
+    // you return the next buffer to use or 0 to stop converting
+
+void stbsp_set_separators( char comma, char period )
+  Set the comma and period characters to use.
+
+FLOATS/DOUBLES:
+===============
+This code uses a internal float->ascii conversion method that uses
+doubles with error correction (double-doubles, for ~105 bits of
+precision).  This conversion is round-trip perfect - that is, an atof
+of the values output here will give you the bit-exact double back.
+
+One difference is that our insignificant digits will be different than
+with MSVC or GCC (but they don't match each other either).  We also
+don't attempt to find the minimum length matching float (pre-MSVC15
+doesn't either).
+
+If you don't need float or doubles at all, define STB_SPRINTF_NOFLOAT
+and you'll save 4K of code space.
+
+64-BIT INTS:
+============
+This library also supports 64-bit integers and you can use MSVC style or
+GCC style indicators (%I64d or %lld).  It supports the C99 specifiers
+for size_t and ptr_diff_t (%jd %zd) as well.
+
+EXTRAS:
+=======
+Like some GCCs, for integers and floats, you can use a ' (single quote)
+specifier and commas will be inserted on the thousands: "%'d" on 12345
+would print 12,345.
+
+For integers and floats, you can use a "$" specifier and the number
+will be converted to float and then divided to get kilo, mega, giga or
+tera and then printed, so "%$d" 1000 is "1.0 k", "%$.2d" 2536000 is
+"2.53 M", etc. For byte values, use two $:s, like "%$$d" to turn
+2536000 to "2.42 Mi". If you prefer JEDEC suffixes to SI ones, use three
+$:s: "%$$$d" -> "2.42 M". To remove the space between the number and the
+suffix, add "_" specifier: "%_$d" -> "2.53M".
+
+In addition to octal and hexadecimal conversions, you can print
+integers in binary: "%b" for 256 would print 100.
+
+PERFORMANCE vs MSVC 2008 32-/64-bit (GCC is even slower than MSVC):
+===================================================================
+"%d" across all 32-bit ints (4.8x/4.0x faster than 32-/64-bit MSVC)
+"%24d" across all 32-bit ints (4.5x/4.2x faster)
+"%x" across all 32-bit ints (4.5x/3.8x faster)
+"%08x" across all 32-bit ints (4.3x/3.8x faster)
+"%f" across e-10 to e+10 floats (7.3x/6.0x faster)
+"%e" across e-10 to e+10 floats (8.1x/6.0x faster)
+"%g" across e-10 to e+10 floats (10.0x/7.1x faster)
+"%f" for values near e-300 (7.9x/6.5x faster)
+"%f" for values near e+300 (10.0x/9.1x faster)
+"%e" for values near e-300 (10.1x/7.0x faster)
+"%e" for values near e+300 (9.2x/6.0x faster)
+"%.320f" for values near e-300 (12.6x/11.2x faster)
+"%a" for random values (8.6x/4.3x faster)
+"%I64d" for 64-bits with 32-bit values (4.8x/3.4x faster)
+"%I64d" for 64-bits > 32-bit values (4.9x/5.5x faster)
+"%s%s%s" for 64 char strings (7.1x/7.3x faster)
+"...512 char string..." ( 35.0x/32.5x faster!)
+*/
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wcast-qual"
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#if defined(__clang__)
+ #if defined(__has_feature) && defined(__has_attribute)
+  #if __has_feature(address_sanitizer)
+   #if __has_attribute(__no_sanitize__)
+    #define STBSP__ASAN __attribute__((__no_sanitize__("address")))
+   #elif __has_attribute(__no_sanitize_address__)
+    #define STBSP__ASAN __attribute__((__no_sanitize_address__))
+   #elif __has_attribute(__no_address_safety_analysis__)
+    #define STBSP__ASAN __attribute__((__no_address_safety_analysis__))
+   #endif
+  #endif
+ #endif
+#elif defined(__GNUC__) && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))
+ #if defined(__SANITIZE_ADDRESS__) && __SANITIZE_ADDRESS__
+  #define STBSP__ASAN __attribute__((__no_sanitize_address__))
+ #endif
+#endif
+
+#ifndef STBSP__ASAN
+#define STBSP__ASAN
+#endif
+
+#ifdef STB_SPRINTF_STATIC
+#define STBSP__PUBLICDEC static
+#define STBSP__PUBLICDEF static STBSP__ASAN
+#else
+#ifdef __cplusplus
+#define STBSP__PUBLICDEC extern "C"
+#define STBSP__PUBLICDEF extern "C" STBSP__ASAN
+#else
+#define STBSP__PUBLICDEC extern
+#define STBSP__PUBLICDEF STBSP__ASAN
+#endif
+#endif
+
+#if defined(__has_attribute)
+ #if __has_attribute(format)
+   #define STBSP__ATTRIBUTE_FORMAT(fmt,va) __attribute__((format(printf,fmt,va)))
+ #endif
+#endif
+
+#ifndef STBSP__ATTRIBUTE_FORMAT
+#define STBSP__ATTRIBUTE_FORMAT(fmt,va)
+#endif
+
+#ifdef _MSC_VER
+#define STBSP__NOTUSED(v)  (void)(v)
+#else
+#define STBSP__NOTUSED(v)  (void)sizeof(v)
+#endif
+
+#include <stdarg.h> // for va_arg(), va_list()
+#include <stddef.h> // size_t, ptrdiff_t
+
+#ifndef STB_SPRINTF_MIN
+#define STB_SPRINTF_MIN 512 // how many characters per callback
+#endif
+typedef char *STBSP_SPRINTFCB(const char *buf, void *user, int len);
+
+#ifndef STB_SPRINTF_DECORATE
+#define STB_SPRINTF_DECORATE(name) stbsp_##name // define this before including if you want to change the names
+#endif
+
+STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(vsprintf)(char *buf, char const *fmt, va_list va);
+STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(vsnprintf)(char *buf, int count, char const *fmt, va_list va);
+STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(sprintf)(char *buf, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(2,3);
+STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(snprintf)(char *buf, int count, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(3,4);
+
+STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback, void *user, char *buf, char const *fmt, va_list va);
+STBSP__PUBLICDEC void STB_SPRINTF_DECORATE(set_separators)(char comma, char period);
+
+#endif // STB_SPRINTF_H_INCLUDE
+
+#ifdef STB_SPRINTF_IMPLEMENTATION
+
+#define stbsp__uint32 unsigned int
+#define stbsp__int32 signed int
+
+#ifdef _MSC_VER
+#define stbsp__uint64 unsigned __int64
+#define stbsp__int64 signed __int64
+#else
+#define stbsp__uint64 unsigned long long
+#define stbsp__int64 signed long long
+#endif
+#define stbsp__uint16 unsigned short
+
+#ifndef stbsp__uintptr
+#if defined(__ppc64__) || defined(__powerpc64__) || defined(__aarch64__) || defined(_M_X64) || defined(__x86_64__) || defined(__x86_64) || defined(__s390x__)
+#define stbsp__uintptr stbsp__uint64
+#else
+#define stbsp__uintptr stbsp__uint32
+#endif
+#endif
+
+#ifndef STB_SPRINTF_MSVC_MODE // used for MSVC2013 and earlier (MSVC2015 matches GCC)
+#if defined(_MSC_VER) && (_MSC_VER < 1900)
+#define STB_SPRINTF_MSVC_MODE
+#endif
+#endif
+
+#ifdef STB_SPRINTF_NOUNALIGNED // define this before inclusion to force stbsp_sprintf to always use aligned accesses
+#define STBSP__UNALIGNED(code)
+#else
+#define STBSP__UNALIGNED(code) code
+#endif
+
+#ifndef STB_SPRINTF_NOFLOAT
+// internal float utility functions
+static stbsp__int32 stbsp__real_to_str(char const **start, stbsp__uint32 *len, char *out, stbsp__int32 *decimal_pos, double value, stbsp__uint32 frac_digits);
+static stbsp__int32 stbsp__real_to_parts(stbsp__int64 *bits, stbsp__int32 *expo, double value);
+#define STBSP__SPECIAL 0x7000
+#endif
+
+static char stbsp__period = '.';
+static char stbsp__comma = ',';
+static struct
+{
+   short temp; // force next field to be 2-byte aligned
+   char pair[201];
+} stbsp__digitpair =
+{
+  0,
+   "00010203040506070809101112131415161718192021222324"
+   "25262728293031323334353637383940414243444546474849"
+   "50515253545556575859606162636465666768697071727374"
+   "75767778798081828384858687888990919293949596979899"
+};
+
+STBSP__PUBLICDEF void STB_SPRINTF_DECORATE(set_separators)(char pcomma, char pperiod)
+{
+   stbsp__period = pperiod;
+   stbsp__comma = pcomma;
+}
+
+#define STBSP__LEFTJUST 1
+#define STBSP__LEADINGPLUS 2
+#define STBSP__LEADINGSPACE 4
+#define STBSP__LEADING_0X 8
+#define STBSP__LEADINGZERO 16
+#define STBSP__INTMAX 32
+#define STBSP__TRIPLET_COMMA 64
+#define STBSP__NEGATIVE 128
+#define STBSP__METRIC_SUFFIX 256
+#define STBSP__HALFWIDTH 512
+#define STBSP__METRIC_NOSPACE 1024
+#define STBSP__METRIC_1024 2048
+#define STBSP__METRIC_JEDEC 4096
+
+static void stbsp__lead_sign(stbsp__uint32 fl, char *sign)
+{
+   sign[0] = 0;
+   if (fl & STBSP__NEGATIVE) {
+      sign[0] = 1;
+      sign[1] = '-';
+   } else if (fl & STBSP__LEADINGSPACE) {
+      sign[0] = 1;
+      sign[1] = ' ';
+   } else if (fl & STBSP__LEADINGPLUS) {
+      sign[0] = 1;
+      sign[1] = '+';
+   }
+}
+
+static STBSP__ASAN stbsp__uint32 stbsp__strlen_limited(char const *s, stbsp__uint32 limit)
+{
+   char const * sn = s;
+
+   // get up to 4-byte alignment
+   for (;;) {
+      if (((stbsp__uintptr)sn & 3) == 0)
+         break;
+
+      if (!limit || *sn == 0)
+         return (stbsp__uint32)(sn - s);
+
+      ++sn;
+      --limit;
+   }
+
+   // scan over 4 bytes at a time to find terminating 0
+   // this will intentionally scan up to 3 bytes past the end of buffers,
+   // but becase it works 4B aligned, it will never cross page boundaries
+   // (hence the STBSP__ASAN markup; the over-read here is intentional
+   // and harmless)
+   while (limit >= 4) {
+      stbsp__uint32 v = *(stbsp__uint32 *)sn;
+      // bit hack to find if there's a 0 byte in there
+      if ((v - 0x01010101) & (~v) & 0x80808080UL)
+         break;
+
+      sn += 4;
+      limit -= 4;
+   }
+
+   // handle the last few characters to find actual size
+   while (limit && *sn) {
+      ++sn;
+      --limit;
+   }
+
+   return (stbsp__uint32)(sn - s);
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback, void *user, char *buf, char const *fmt, va_list va)
+{
+   static char hex[] = "0123456789abcdefxp";
+   static char hexu[] = "0123456789ABCDEFXP";
+   char *bf;
+   char const *f;
+   int tlen = 0;
+
+   bf = buf;
+   f = fmt;
+   for (;;) {
+      stbsp__int32 fw, pr, tz;
+      stbsp__uint32 fl;
+
+      // macros for the callback buffer stuff
+      #define stbsp__chk_cb_bufL(bytes)                        \
+         {                                                     \
+            int len = (int)(bf - buf);                         \
+            if ((len + (bytes)) >= STB_SPRINTF_MIN) {          \
+               tlen += len;                                    \
+               if (0 == (bf = buf = callback(buf, user, len))) \
+                  goto done;                                   \
+            }                                                  \
+         }
+      #define stbsp__chk_cb_buf(bytes)    \
+         {                                \
+            if (callback) {               \
+               stbsp__chk_cb_bufL(bytes); \
+            }                             \
+         }
+      #define stbsp__flush_cb()                      \
+         {                                           \
+            stbsp__chk_cb_bufL(STB_SPRINTF_MIN - 1); \
+         } // flush if there is even one byte in the buffer
+      #define stbsp__cb_buf_clamp(cl, v)                \
+         cl = v;                                        \
+         if (callback) {                                \
+            int lg = STB_SPRINTF_MIN - (int)(bf - buf); \
+            if (cl > lg)                                \
+               cl = lg;                                 \
+         }
+
+      // fast copy everything up to the next % (or end of string)
+      for (;;) {
+         while (((stbsp__uintptr)f) & 3) {
+         schk1:
+            if (f[0] == '%')
+               goto scandd;
+         schk2:
+            if (f[0] == 0)
+               goto endfmt;
+            stbsp__chk_cb_buf(1);
+            *bf++ = f[0];
+            ++f;
+         }
+         for (;;) {
+            // Check if the next 4 bytes contain %(0x25) or end of string.
+            // Using the 'hasless' trick:
+            // https://graphics.stanford.edu/~seander/bithacks.html#HasLessInWord
+            stbsp__uint32 v, c;
+            v = *(stbsp__uint32 *)f;
+            c = (~v) & 0x80808080;
+            if (((v ^ 0x25252525) - 0x01010101) & c)
+               goto schk1;
+            if ((v - 0x01010101) & c)
+               goto schk2;
+            if (callback)
+               if ((STB_SPRINTF_MIN - (int)(bf - buf)) < 4)
+                  goto schk1;
+            #ifdef STB_SPRINTF_NOUNALIGNED
+                if(((stbsp__uintptr)bf) & 3) {
+                    bf[0] = f[0];
+                    bf[1] = f[1];
+                    bf[2] = f[2];
+                    bf[3] = f[3];
+                } else
+            #endif
+            {
+                *(stbsp__uint32 *)bf = v;
+            }
+            bf += 4;
+            f += 4;
+         }
+      }
+   scandd:
+
+      ++f;
+
+      // ok, we have a percent, read the modifiers first
+      fw = 0;
+      pr = -1;
+      fl = 0;
+      tz = 0;
+
+      // flags
+      for (;;) {
+         switch (f[0]) {
+         // if we have left justify
+         case '-':
+            fl |= STBSP__LEFTJUST;
+            ++f;
+            continue;
+         // if we have leading plus
+         case '+':
+            fl |= STBSP__LEADINGPLUS;
+            ++f;
+            continue;
+         // if we have leading space
+         case ' ':
+            fl |= STBSP__LEADINGSPACE;
+            ++f;
+            continue;
+         // if we have leading 0x
+         case '#':
+            fl |= STBSP__LEADING_0X;
+            ++f;
+            continue;
+         // if we have thousand commas
+         case '\'':
+            fl |= STBSP__TRIPLET_COMMA;
+            ++f;
+            continue;
+         // if we have kilo marker (none->kilo->kibi->jedec)
+         case '$':
+            if (fl & STBSP__METRIC_SUFFIX) {
+               if (fl & STBSP__METRIC_1024) {
+                  fl |= STBSP__METRIC_JEDEC;
+               } else {
+                  fl |= STBSP__METRIC_1024;
+               }
+            } else {
+               fl |= STBSP__METRIC_SUFFIX;
+            }
+            ++f;
+            continue;
+         // if we don't want space between metric suffix and number
+         case '_':
+            fl |= STBSP__METRIC_NOSPACE;
+            ++f;
+            continue;
+         // if we have leading zero
+         case '0':
+            fl |= STBSP__LEADINGZERO;
+            ++f;
+            goto flags_done;
+         default: goto flags_done;
+         }
+      }
+   flags_done:
+
+      // get the field width
+      if (f[0] == '*') {
+         fw = va_arg(va, stbsp__uint32);
+         ++f;
+      } else {
+         while ((f[0] >= '0') && (f[0] <= '9')) {
+            fw = fw * 10 + f[0] - '0';
+            f++;
+         }
+      }
+      // get the precision
+      if (f[0] == '.') {
+         ++f;
+         if (f[0] == '*') {
+            pr = va_arg(va, stbsp__uint32);
+            ++f;
+         } else {
+            pr = 0;
+            while ((f[0] >= '0') && (f[0] <= '9')) {
+               pr = pr * 10 + f[0] - '0';
+               f++;
+            }
+         }
+      }
+
+      // handle integer size overrides
+      switch (f[0]) {
+      // are we halfwidth?
+      case 'h':
+         fl |= STBSP__HALFWIDTH;
+         ++f;
+         if (f[0] == 'h')
+            ++f;  // QUARTERWIDTH
+         break;
+      // are we 64-bit (unix style)
+      case 'l':
+         fl |= ((sizeof(long) == 8) ? STBSP__INTMAX : 0);
+         ++f;
+         if (f[0] == 'l') {
+            fl |= STBSP__INTMAX;
+            ++f;
+         }
+         break;
+      // are we 64-bit on intmax? (c99)
+      case 'j':
+         fl |= (sizeof(size_t) == 8) ? STBSP__INTMAX : 0;
+         ++f;
+         break;
+      // are we 64-bit on size_t or ptrdiff_t? (c99)
+      case 'z':
+         fl |= (sizeof(ptrdiff_t) == 8) ? STBSP__INTMAX : 0;
+         ++f;
+         break;
+      case 't':
+         fl |= (sizeof(ptrdiff_t) == 8) ? STBSP__INTMAX : 0;
+         ++f;
+         break;
+      // are we 64-bit (msft style)
+      case 'I':
+         if ((f[1] == '6') && (f[2] == '4')) {
+            fl |= STBSP__INTMAX;
+            f += 3;
+         } else if ((f[1] == '3') && (f[2] == '2')) {
+            f += 3;
+         } else {
+            fl |= ((sizeof(void *) == 8) ? STBSP__INTMAX : 0);
+            ++f;
+         }
+         break;
+      default: break;
+      }
+
+      // handle each replacement
+      switch (f[0]) {
+         #define STBSP__NUMSZ 512 // big enough for e308 (with commas) or e-307
+         char num[STBSP__NUMSZ];
+         char lead[8];
+         char tail[8];
+         char *s;
+         char const *h;
+         stbsp__uint32 l, n, cs;
+         stbsp__uint64 n64;
+#ifndef STB_SPRINTF_NOFLOAT
+         double fv;
+#endif
+         stbsp__int32 dp;
+         char const *sn;
+
+      case 's':
+         // get the string
+         s = va_arg(va, char *);
+         if (s == 0)
+            s = (char *)"null";
+         // get the length, limited to desired precision
+         // always limit to ~0u chars since our counts are 32b
+         l = stbsp__strlen_limited(s, (pr >= 0) ? (unsigned)pr : ~0u);
+         lead[0] = 0;
+         tail[0] = 0;
+         pr = 0;
+         dp = 0;
+         cs = 0;
+         // copy the string in
+         goto scopy;
+
+      case 'c': // char
+         // get the character
+         s = num + STBSP__NUMSZ - 1;
+         *s = (char)va_arg(va, int);
+         l = 1;
+         lead[0] = 0;
+         tail[0] = 0;
+         pr = 0;
+         dp = 0;
+         cs = 0;
+         goto scopy;
+
+      case 'n': // weird write-bytes specifier
+      {
+         int *d = va_arg(va, int *);
+         *d = tlen + (int)(bf - buf);
+      } break;
+
+#ifdef STB_SPRINTF_NOFLOAT
+      case 'A':              // float
+      case 'a':              // hex float
+      case 'G':              // float
+      case 'g':              // float
+      case 'E':              // float
+      case 'e':              // float
+      case 'f':              // float
+         va_arg(va, double); // eat it
+         s = (char *)"No float";
+         l = 8;
+         lead[0] = 0;
+         tail[0] = 0;
+         pr = 0;
+         cs = 0;
+         STBSP__NOTUSED(dp);
+         goto scopy;
+#else
+      case 'A': // hex float
+      case 'a': // hex float
+         h = (f[0] == 'A') ? hexu : hex;
+         fv = va_arg(va, double);
+         if (pr == -1)
+            pr = 6; // default is 6
+         // read the double into a string
+         if (stbsp__real_to_parts((stbsp__int64 *)&n64, &dp, fv))
+            fl |= STBSP__NEGATIVE;
+
+         s = num + 64;
+
+         stbsp__lead_sign(fl, lead);
+
+         if (dp == -1023)
+            dp = (n64) ? -1022 : 0;
+         else
+            n64 |= (((stbsp__uint64)1) << 52);
+         n64 <<= (64 - 56);
+         if (pr < 15)
+            n64 += ((((stbsp__uint64)8) << 56) >> (pr * 4));
+// add leading chars
+
+#ifdef STB_SPRINTF_MSVC_MODE
+         *s++ = '0';
+         *s++ = 'x';
+#else
+         lead[1 + lead[0]] = '0';
+         lead[2 + lead[0]] = 'x';
+         lead[0] += 2;
+#endif
+         *s++ = h[(n64 >> 60) & 15];
+         n64 <<= 4;
+         if (pr)
+            *s++ = stbsp__period;
+         sn = s;
+
+         // print the bits
+         n = pr;
+         if (n > 13)
+            n = 13;
+         if (pr > (stbsp__int32)n)
+            tz = pr - n;
+         pr = 0;
+         while (n--) {
+            *s++ = h[(n64 >> 60) & 15];
+            n64 <<= 4;
+         }
+
+         // print the expo
+         tail[1] = h[17];
+         if (dp < 0) {
+            tail[2] = '-';
+            dp = -dp;
+         } else
+            tail[2] = '+';
+         n = (dp >= 1000) ? 6 : ((dp >= 100) ? 5 : ((dp >= 10) ? 4 : 3));
+         tail[0] = (char)n;
+         for (;;) {
+            tail[n] = '0' + dp % 10;
+            if (n <= 3)
+               break;
+            --n;
+            dp /= 10;
+         }
+
+         dp = (int)(s - sn);
+         l = (int)(s - (num + 64));
+         s = num + 64;
+         cs = 1 + (3 << 24);
+         goto scopy;
+
+      case 'G': // float
+      case 'g': // float
+         h = (f[0] == 'G') ? hexu : hex;
+         fv = va_arg(va, double);
+         if (pr == -1)
+            pr = 6;
+         else if (pr == 0)
+            pr = 1; // default is 6
+         // read the double into a string
+         if (stbsp__real_to_str(&sn, &l, num, &dp, fv, (pr - 1) | 0x80000000))
+            fl |= STBSP__NEGATIVE;
+
+         // clamp the precision and delete extra zeros after clamp
+         n = pr;
+         if (l > (stbsp__uint32)pr)
+            l = pr;
+         while ((l > 1) && (pr) && (sn[l - 1] == '0')) {
+            --pr;
+            --l;
+         }
+
+         // should we use %e
+         if ((dp <= -4) || (dp > (stbsp__int32)n)) {
+            if (pr > (stbsp__int32)l)
+               pr = l - 1;
+            else if (pr)
+               --pr; // when using %e, there is one digit before the decimal
+            goto doexpfromg;
+         }
+         // this is the insane action to get the pr to match %g semantics for %f
+         if (dp > 0) {
+            pr = (dp < (stbsp__int32)l) ? l - dp : 0;
+         } else {
+            pr = -dp + ((pr > (stbsp__int32)l) ? (stbsp__int32) l : pr);
+         }
+         goto dofloatfromg;
+
+      case 'E': // float
+      case 'e': // float
+         h = (f[0] == 'E') ? hexu : hex;
+         fv = va_arg(va, double);
+         if (pr == -1)
+            pr = 6; // default is 6
+         // read the double into a string
+         if (stbsp__real_to_str(&sn, &l, num, &dp, fv, pr | 0x80000000))
+            fl |= STBSP__NEGATIVE;
+      doexpfromg:
+         tail[0] = 0;
+         stbsp__lead_sign(fl, lead);
+         if (dp == STBSP__SPECIAL) {
+            s = (char *)sn;
+            cs = 0;
+            pr = 0;
+            goto scopy;
+         }
+         s = num + 64;
+         // handle leading chars
+         *s++ = sn[0];
+
+         if (pr)
+            *s++ = stbsp__period;
+
+         // handle after decimal
+         if ((l - 1) > (stbsp__uint32)pr)
+            l = pr + 1;
+         for (n = 1; n < l; n++)
+            *s++ = sn[n];
+         // trailing zeros
+         tz = pr - (l - 1);
+         pr = 0;
+         // dump expo
+         tail[1] = h[0xe];
+         dp -= 1;
+         if (dp < 0) {
+            tail[2] = '-';
+            dp = -dp;
+         } else
+            tail[2] = '+';
+#ifdef STB_SPRINTF_MSVC_MODE
+         n = 5;
+#else
+         n = (dp >= 100) ? 5 : 4;
+#endif
+         tail[0] = (char)n;
+         for (;;) {
+            tail[n] = '0' + dp % 10;
+            if (n <= 3)
+               break;
+            --n;
+            dp /= 10;
+         }
+         cs = 1 + (3 << 24); // how many tens
+         goto flt_lead;
+
+      case 'f': // float
+         fv = va_arg(va, double);
+      doafloat:
+         // do kilos
+         if (fl & STBSP__METRIC_SUFFIX) {
+            double divisor;
+            divisor = 1000.0f;
+            if (fl & STBSP__METRIC_1024)
+               divisor = 1024.0;
+            while (fl < 0x4000000) {
+               if ((fv < divisor) && (fv > -divisor))
+                  break;
+               fv /= divisor;
+               fl += 0x1000000;
+            }
+         }
+         if (pr == -1)
+            pr = 6; // default is 6
+         // read the double into a string
+         if (stbsp__real_to_str(&sn, &l, num, &dp, fv, pr))
+            fl |= STBSP__NEGATIVE;
+      dofloatfromg:
+         tail[0] = 0;
+         stbsp__lead_sign(fl, lead);
+         if (dp == STBSP__SPECIAL) {
+            s = (char *)sn;
+            cs = 0;
+            pr = 0;
+            goto scopy;
+         }
+         s = num + 64;
+
+         // handle the three decimal varieties
+         if (dp <= 0) {
+            stbsp__int32 i;
+            // handle 0.000*000xxxx
+            *s++ = '0';
+            if (pr)
+               *s++ = stbsp__period;
+            n = -dp;
+            if ((stbsp__int32)n > pr)
+               n = pr;
+            i = n;
+            while (i) {
+               if ((((stbsp__uintptr)s) & 3) == 0)
+                  break;
+               *s++ = '0';
+               --i;
+            }
+            while (i >= 4) {
+               *(stbsp__uint32 *)s = 0x30303030;
+               s += 4;
+               i -= 4;
+            }
+            while (i) {
+               *s++ = '0';
+               --i;
+            }
+            if ((stbsp__int32)(l + n) > pr)
+               l = pr - n;
+            i = l;
+            while (i) {
+               *s++ = *sn++;
+               --i;
+            }
+            tz = pr - (n + l);
+            cs = 1 + (3 << 24); // how many tens did we write (for commas below)
+         } else {
+            cs = (fl & STBSP__TRIPLET_COMMA) ? ((600 - (stbsp__uint32)dp) % 3) : 0;
+            if ((stbsp__uint32)dp >= l) {
+               // handle xxxx000*000.0
+               n = 0;
+               for (;;) {
+                  if ((fl & STBSP__TRIPLET_COMMA) && (++cs == 4)) {
+                     cs = 0;
+                     *s++ = stbsp__comma;
+                  } else {
+                     *s++ = sn[n];
+                     ++n;
+                     if (n >= l)
+                        break;
+                  }
+               }
+               if (n < (stbsp__uint32)dp) {
+                  n = dp - n;
+                  if ((fl & STBSP__TRIPLET_COMMA) == 0) {
+                     while (n) {
+                        if ((((stbsp__uintptr)s) & 3) == 0)
+                           break;
+                        *s++ = '0';
+                        --n;
+                     }
+                     while (n >= 4) {
+                        *(stbsp__uint32 *)s = 0x30303030;
+                        s += 4;
+                        n -= 4;
+                     }
+                  }
+                  while (n) {
+                     if ((fl & STBSP__TRIPLET_COMMA) && (++cs == 4)) {
+                        cs = 0;
+                        *s++ = stbsp__comma;
+                     } else {
+                        *s++ = '0';
+                        --n;
+                     }
+                  }
+               }
+               cs = (int)(s - (num + 64)) + (3 << 24); // cs is how many tens
+               if (pr) {
+                  *s++ = stbsp__period;
+                  tz = pr;
+               }
+            } else {
+               // handle xxxxx.xxxx000*000
+               n = 0;
+               for (;;) {
+                  if ((fl & STBSP__TRIPLET_COMMA) && (++cs == 4)) {
+                     cs = 0;
+                     *s++ = stbsp__comma;
+                  } else {
+                     *s++ = sn[n];
+                     ++n;
+                     if (n >= (stbsp__uint32)dp)
+                        break;
+                  }
+               }
+               cs = (int)(s - (num + 64)) + (3 << 24); // cs is how many tens
+               if (pr)
+                  *s++ = stbsp__period;
+               if ((l - dp) > (stbsp__uint32)pr)
+                  l = pr + dp;
+               while (n < l) {
+                  *s++ = sn[n];
+                  ++n;
+               }
+               tz = pr - (l - dp);
+            }
+         }
+         pr = 0;
+
+         // handle k,m,g,t
+         if (fl & STBSP__METRIC_SUFFIX) {
+            char idx;
+            idx = 1;
+            if (fl & STBSP__METRIC_NOSPACE)
+               idx = 0;
+            tail[0] = idx;
+            tail[1] = ' ';
+            {
+               if (fl >> 24) { // SI kilo is 'k', JEDEC and SI kibits are 'K'.
+                  if (fl & STBSP__METRIC_1024)
+                     tail[idx + 1] = "_KMGT"[fl >> 24];
+                  else
+                     tail[idx + 1] = "_kMGT"[fl >> 24];
+                  idx++;
+                  // If printing kibits and not in jedec, add the 'i'.
+                  if (fl & STBSP__METRIC_1024 && !(fl & STBSP__METRIC_JEDEC)) {
+                     tail[idx + 1] = 'i';
+                     idx++;
+                  }
+                  tail[0] = idx;
+               }
+            }
+         };
+
+      flt_lead:
+         // get the length that we copied
+         l = (stbsp__uint32)(s - (num + 64));
+         s = num + 64;
+         goto scopy;
+#endif
+
+      case 'B': // upper binary
+      case 'b': // lower binary
+         h = (f[0] == 'B') ? hexu : hex;
+         lead[0] = 0;
+         if (fl & STBSP__LEADING_0X) {
+            lead[0] = 2;
+            lead[1] = '0';
+            lead[2] = h[0xb];
+         }
+         l = (8 << 4) | (1 << 8);
+         goto radixnum;
+
+      case 'o': // octal
+         h = hexu;
+         lead[0] = 0;
+         if (fl & STBSP__LEADING_0X) {
+            lead[0] = 1;
+            lead[1] = '0';
+         }
+         l = (3 << 4) | (3 << 8);
+         goto radixnum;
+
+      case 'p': // pointer
+         fl |= (sizeof(void *) == 8) ? STBSP__INTMAX : 0;
+         pr = sizeof(void *) * 2;
+         fl &= ~STBSP__LEADINGZERO; // 'p' only prints the pointer with zeros
+                                    // fall through - to X
+
+      case 'X': // upper hex
+      case 'x': // lower hex
+         h = (f[0] == 'X') ? hexu : hex;
+         l = (4 << 4) | (4 << 8);
+         lead[0] = 0;
+         if (fl & STBSP__LEADING_0X) {
+            lead[0] = 2;
+            lead[1] = '0';
+            lead[2] = h[16];
+         }
+      radixnum:
+         // get the number
+         if (fl & STBSP__INTMAX)
+            n64 = va_arg(va, stbsp__uint64);
+         else
+            n64 = va_arg(va, stbsp__uint32);
+
+         s = num + STBSP__NUMSZ;
+         dp = 0;
+         // clear tail, and clear leading if value is zero
+         tail[0] = 0;
+         if (n64 == 0) {
+            lead[0] = 0;
+            if (pr == 0) {
+               l = 0;
+               cs = 0;
+               goto scopy;
+            }
+         }
+         // convert to string
+         for (;;) {
+            *--s = h[n64 & ((1 << (l >> 8)) - 1)];
+            n64 >>= (l >> 8);
+            if (!((n64) || ((stbsp__int32)((num + STBSP__NUMSZ) - s) < pr)))
+               break;
+            if (fl & STBSP__TRIPLET_COMMA) {
+               ++l;
+               if ((l & 15) == ((l >> 4) & 15)) {
+                  l &= ~15;
+                  *--s = stbsp__comma;
+               }
+            }
+         };
+         // get the tens and the comma pos
+         cs = (stbsp__uint32)((num + STBSP__NUMSZ) - s) + ((((l >> 4) & 15)) << 24);
+         // get the length that we copied
+         l = (stbsp__uint32)((num + STBSP__NUMSZ) - s);
+         // copy it
+         goto scopy;
+
+      case 'u': // unsigned
+      case 'i':
+      case 'd': // integer
+         // get the integer and abs it
+         if (fl & STBSP__INTMAX) {
+            stbsp__int64 i64 = va_arg(va, stbsp__int64);
+            n64 = (stbsp__uint64)i64;
+            if ((f[0] != 'u') && (i64 < 0)) {
+               n64 = (stbsp__uint64)-i64;
+               fl |= STBSP__NEGATIVE;
+            }
+         } else {
+            stbsp__int32 i = va_arg(va, stbsp__int32);
+            n64 = (stbsp__uint32)i;
+            if ((f[0] != 'u') && (i < 0)) {
+               n64 = (stbsp__uint32)-i;
+               fl |= STBSP__NEGATIVE;
+            }
+         }
+
+#ifndef STB_SPRINTF_NOFLOAT
+         if (fl & STBSP__METRIC_SUFFIX) {
+            if (n64 < 1024)
+               pr = 0;
+            else if (pr == -1)
+               pr = 1;
+            fv = (double)(stbsp__int64)n64;
+            goto doafloat;
+         }
+#endif
+
+         // convert to string
+         s = num + STBSP__NUMSZ;
+         l = 0;
+
+         for (;;) {
+            // do in 32-bit chunks (avoid lots of 64-bit divides even with constant denominators)
+            char *o = s - 8;
+            if (n64 >= 100000000) {
+               n = (stbsp__uint32)(n64 % 100000000);
+               n64 /= 100000000;
+            } else {
+               n = (stbsp__uint32)n64;
+               n64 = 0;
+            }
+            if ((fl & STBSP__TRIPLET_COMMA) == 0) {
+               do {
+                  s -= 2;
+                  *(stbsp__uint16 *)s = *(stbsp__uint16 *)&stbsp__digitpair.pair[(n % 100) * 2];
+                  n /= 100;
+               } while (n);
+            }
+            while (n) {
+               if ((fl & STBSP__TRIPLET_COMMA) && (l++ == 3)) {
+                  l = 0;
+                  *--s = stbsp__comma;
+                  --o;
+               } else {
+                  *--s = (char)(n % 10) + '0';
+                  n /= 10;
+               }
+            }
+            if (n64 == 0) {
+               if ((s[0] == '0') && (s != (num + STBSP__NUMSZ)))
+                  ++s;
+               break;
+            }
+            while (s != o)
+               if ((fl & STBSP__TRIPLET_COMMA) && (l++ == 3)) {
+                  l = 0;
+                  *--s = stbsp__comma;
+                  --o;
+               } else {
+                  *--s = '0';
+               }
+         }
+
+         tail[0] = 0;
+         stbsp__lead_sign(fl, lead);
+
+         // get the length that we copied
+         l = (stbsp__uint32)((num + STBSP__NUMSZ) - s);
+         if (l == 0) {
+            *--s = '0';
+            l = 1;
+         }
+         cs = l + (3 << 24);
+         if (pr < 0)
+            pr = 0;
+
+      scopy:
+         // get fw=leading/trailing space, pr=leading zeros
+         if (pr < (stbsp__int32)l)
+            pr = l;
+         n = pr + lead[0] + tail[0] + tz;
+         if (fw < (stbsp__int32)n)
+            fw = n;
+         fw -= n;
+         pr -= l;
+
+         // handle right justify and leading zeros
+         if ((fl & STBSP__LEFTJUST) == 0) {
+            if (fl & STBSP__LEADINGZERO) // if leading zeros, everything is in pr
+            {
+               pr = (fw > pr) ? fw : pr;
+               fw = 0;
+            } else {
+               fl &= ~STBSP__TRIPLET_COMMA; // if no leading zeros, then no commas
+            }
+         }
+
+         // copy the spaces and/or zeros
+         if (fw + pr) {
+            stbsp__int32 i;
+            stbsp__uint32 c;
+
+            // copy leading spaces (or when doing %8.4d stuff)
+            if ((fl & STBSP__LEFTJUST) == 0)
+               while (fw > 0) {
+                  stbsp__cb_buf_clamp(i, fw);
+                  fw -= i;
+                  while (i) {
+                     if ((((stbsp__uintptr)bf) & 3) == 0)
+                        break;
+                     *bf++ = ' ';
+                     --i;
+                  }
+                  while (i >= 4) {
+                     *(stbsp__uint32 *)bf = 0x20202020;
+                     bf += 4;
+                     i -= 4;
+                  }
+                  while (i) {
+                     *bf++ = ' ';
+                     --i;
+                  }
+                  stbsp__chk_cb_buf(1);
+               }
+
+            // copy leader
+            sn = lead + 1;
+            while (lead[0]) {
+               stbsp__cb_buf_clamp(i, lead[0]);
+               lead[0] -= (char)i;
+               while (i) {
+                  *bf++ = *sn++;
+                  --i;
+               }
+               stbsp__chk_cb_buf(1);
+            }
+
+            // copy leading zeros
+            c = cs >> 24;
+            cs &= 0xffffff;
+            cs = (fl & STBSP__TRIPLET_COMMA) ? ((stbsp__uint32)(c - ((pr + cs) % (c + 1)))) : 0;
+            while (pr > 0) {
+               stbsp__cb_buf_clamp(i, pr);
+               pr -= i;
+               if ((fl & STBSP__TRIPLET_COMMA) == 0) {
+                  while (i) {
+                     if ((((stbsp__uintptr)bf) & 3) == 0)
+                        break;
+                     *bf++ = '0';
+                     --i;
+                  }
+                  while (i >= 4) {
+                     *(stbsp__uint32 *)bf = 0x30303030;
+                     bf += 4;
+                     i -= 4;
+                  }
+               }
+               while (i) {
+                  if ((fl & STBSP__TRIPLET_COMMA) && (cs++ == c)) {
+                     cs = 0;
+                     *bf++ = stbsp__comma;
+                  } else
+                     *bf++ = '0';
+                  --i;
+               }
+               stbsp__chk_cb_buf(1);
+            }
+         }
+
+         // copy leader if there is still one
+         sn = lead + 1;
+         while (lead[0]) {
+            stbsp__int32 i;
+            stbsp__cb_buf_clamp(i, lead[0]);
+            lead[0] -= (char)i;
+            while (i) {
+               *bf++ = *sn++;
+               --i;
+            }
+            stbsp__chk_cb_buf(1);
+         }
+
+         // copy the string
+         n = l;
+         while (n) {
+            stbsp__int32 i;
+            stbsp__cb_buf_clamp(i, n);
+            n -= i;
+            STBSP__UNALIGNED(while (i >= 4) {
+               *(stbsp__uint32 volatile *)bf = *(stbsp__uint32 volatile *)s;
+               bf += 4;
+               s += 4;
+               i -= 4;
+            })
+            while (i) {
+               *bf++ = *s++;
+               --i;
+            }
+            stbsp__chk_cb_buf(1);
+         }
+
+         // copy trailing zeros
+         while (tz) {
+            stbsp__int32 i;
+            stbsp__cb_buf_clamp(i, tz);
+            tz -= i;
+            while (i) {
+               if ((((stbsp__uintptr)bf) & 3) == 0)
+                  break;
+               *bf++ = '0';
+               --i;
+            }
+            while (i >= 4) {
+               *(stbsp__uint32 *)bf = 0x30303030;
+               bf += 4;
+               i -= 4;
+            }
+            while (i) {
+               *bf++ = '0';
+               --i;
+            }
+            stbsp__chk_cb_buf(1);
+         }
+
+         // copy tail if there is one
+         sn = tail + 1;
+         while (tail[0]) {
+            stbsp__int32 i;
+            stbsp__cb_buf_clamp(i, tail[0]);
+            tail[0] -= (char)i;
+            while (i) {
+               *bf++ = *sn++;
+               --i;
+            }
+            stbsp__chk_cb_buf(1);
+         }
+
+         // handle the left justify
+         if (fl & STBSP__LEFTJUST)
+            if (fw > 0) {
+               while (fw) {
+                  stbsp__int32 i;
+                  stbsp__cb_buf_clamp(i, fw);
+                  fw -= i;
+                  while (i) {
+                     if ((((stbsp__uintptr)bf) & 3) == 0)
+                        break;
+                     *bf++ = ' ';
+                     --i;
+                  }
+                  while (i >= 4) {
+                     *(stbsp__uint32 *)bf = 0x20202020;
+                     bf += 4;
+                     i -= 4;
+                  }
+                  while (i--)
+                     *bf++ = ' ';
+                  stbsp__chk_cb_buf(1);
+               }
+            }
+         break;
+
+      default: // unknown, just copy code
+         s = num + STBSP__NUMSZ - 1;
+         *s = f[0];
+         l = 1;
+         fw = fl = 0;
+         lead[0] = 0;
+         tail[0] = 0;
+         pr = 0;
+         dp = 0;
+         cs = 0;
+         goto scopy;
+      }
+      ++f;
+   }
+endfmt:
+
+   if (!callback)
+      *bf = 0;
+   else
+      stbsp__flush_cb();
+
+done:
+   return tlen + (int)(bf - buf);
+}
+
+// cleanup
+#undef STBSP__LEFTJUST
+#undef STBSP__LEADINGPLUS
+#undef STBSP__LEADINGSPACE
+#undef STBSP__LEADING_0X
+#undef STBSP__LEADINGZERO
+#undef STBSP__INTMAX
+#undef STBSP__TRIPLET_COMMA
+#undef STBSP__NEGATIVE
+#undef STBSP__METRIC_SUFFIX
+#undef STBSP__NUMSZ
+#undef stbsp__chk_cb_bufL
+#undef stbsp__chk_cb_buf
+#undef stbsp__flush_cb
+#undef stbsp__cb_buf_clamp
+
+// ============================================================================
+//   wrapper functions
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(sprintf)(char *buf, char const *fmt, ...)
+{
+   int result;
+   va_list va;
+   va_start(va, fmt);
+   result = STB_SPRINTF_DECORATE(vsprintfcb)(0, 0, buf, fmt, va);
+   va_end(va);
+   return result;
+}
+
+typedef struct stbsp__context {
+   char *buf;
+   int count;
+   int length;
+   char tmp[STB_SPRINTF_MIN];
+} stbsp__context;
+
+static char *stbsp__clamp_callback(const char *buf, void *user, int len)
+{
+   stbsp__context *c = (stbsp__context *)user;
+   c->length += len;
+
+   if (len > c->count)
+      len = c->count;
+
+   if (len) {
+      if (buf != c->buf) {
+         const char *s, *se;
+         char *d;
+         d = c->buf;
+         s = buf;
+         se = buf + len;
+         do {
+            *d++ = *s++;
+         } while (s < se);
+      }
+      c->buf += len;
+      c->count -= len;
+   }
+
+   if (c->count <= 0)
+      return c->tmp;
+   return (c->count >= STB_SPRINTF_MIN) ? c->buf : c->tmp; // go direct into buffer if you can
+}
+
+static char * stbsp__count_clamp_callback( const char * buf, void * user, int len )
+{
+   stbsp__context * c = (stbsp__context*)user;
+   (void) sizeof(buf);
+
+   c->length += len;
+   return c->tmp; // go direct into buffer if you can
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsnprintf )( char * buf, int count, char const * fmt, va_list va )
+{
+   stbsp__context c;
+
+   if ( (count == 0) && !buf )
+   {
+      c.length = 0;
+
+      STB_SPRINTF_DECORATE( vsprintfcb )( stbsp__count_clamp_callback, &c, c.tmp, fmt, va );
+   }
+   else
+   {
+      int l;
+
+      c.buf = buf;
+      c.count = count;
+      c.length = 0;
+
+      STB_SPRINTF_DECORATE( vsprintfcb )( stbsp__clamp_callback, &c, stbsp__clamp_callback(0,&c,0), fmt, va );
+
+      // zero-terminate
+      l = (int)( c.buf - buf );
+      if ( l >= count ) // should never be greater, only equal (or less) than count
+         l = count - 1;
+      buf[l] = 0;
+   }
+
+   return c.length;
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(snprintf)(char *buf, int count, char const *fmt, ...)
+{
+   int result;
+   va_list va;
+   va_start(va, fmt);
+
+   result = STB_SPRINTF_DECORATE(vsnprintf)(buf, count, fmt, va);
+   va_end(va);
+
+   return result;
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintf)(char *buf, char const *fmt, va_list va)
+{
+   return STB_SPRINTF_DECORATE(vsprintfcb)(0, 0, buf, fmt, va);
+}
+
+// =======================================================================
+//   low level float utility functions
+
+#ifndef STB_SPRINTF_NOFLOAT
+
+// copies d to bits w/ strict aliasing (this compiles to nothing on /Ox)
+#define STBSP__COPYFP(dest, src)                   \
+   {                                               \
+      int cn;                                      \
+      for (cn = 0; cn < 8; cn++)                   \
+         ((char *)&dest)[cn] = ((char *)&src)[cn]; \
+   }
+
+// get float info
+static stbsp__int32 stbsp__real_to_parts(stbsp__int64 *bits, stbsp__int32 *expo, double value)
+{
+   double d;
+   stbsp__int64 b = 0;
+
+   // load value and round at the frac_digits
+   d = value;
+
+   STBSP__COPYFP(b, d);
+
+   *bits = b & ((((stbsp__uint64)1) << 52) - 1);
+   *expo = (stbsp__int32)(((b >> 52) & 2047) - 1023);
+
+   return (stbsp__int32)((stbsp__uint64) b >> 63);
+}
+
+static double const stbsp__bot[23] = {
+   1e+000, 1e+001, 1e+002, 1e+003, 1e+004, 1e+005, 1e+006, 1e+007, 1e+008, 1e+009, 1e+010, 1e+011,
+   1e+012, 1e+013, 1e+014, 1e+015, 1e+016, 1e+017, 1e+018, 1e+019, 1e+020, 1e+021, 1e+022
+};
+static double const stbsp__negbot[22] = {
+   1e-001, 1e-002, 1e-003, 1e-004, 1e-005, 1e-006, 1e-007, 1e-008, 1e-009, 1e-010, 1e-011,
+   1e-012, 1e-013, 1e-014, 1e-015, 1e-016, 1e-017, 1e-018, 1e-019, 1e-020, 1e-021, 1e-022
+};
+static double const stbsp__negboterr[22] = {
+   -5.551115123125783e-018,  -2.0816681711721684e-019, -2.0816681711721686e-020, -4.7921736023859299e-021, -8.1803053914031305e-022, 4.5251888174113741e-023,
+   4.5251888174113739e-024,  -2.0922560830128471e-025, -6.2281591457779853e-026, -3.6432197315497743e-027, 6.0503030718060191e-028,  2.0113352370744385e-029,
+   -3.0373745563400371e-030, 1.1806906454401013e-032,  -7.7705399876661076e-032, 2.0902213275965398e-033,  -7.1542424054621921e-034, -7.1542424054621926e-035,
+   2.4754073164739869e-036,  5.4846728545790429e-037,  9.2462547772103625e-038,  -4.8596774326570872e-039
+};
+static double const stbsp__top[13] = {
+   1e+023, 1e+046, 1e+069, 1e+092, 1e+115, 1e+138, 1e+161, 1e+184, 1e+207, 1e+230, 1e+253, 1e+276, 1e+299
+};
+static double const stbsp__negtop[13] = {
+   1e-023, 1e-046, 1e-069, 1e-092, 1e-115, 1e-138, 1e-161, 1e-184, 1e-207, 1e-230, 1e-253, 1e-276, 1e-299
+};
+static double const stbsp__toperr[13] = {
+   8388608,
+   6.8601809640529717e+028,
+   -7.253143638152921e+052,
+   -4.3377296974619174e+075,
+   -1.5559416129466825e+098,
+   -3.2841562489204913e+121,
+   -3.7745893248228135e+144,
+   -1.7356668416969134e+167,
+   -3.8893577551088374e+190,
+   -9.9566444326005119e+213,
+   6.3641293062232429e+236,
+   -5.2069140800249813e+259,
+   -5.2504760255204387e+282
+};
+static double const stbsp__negtoperr[13] = {
+   3.9565301985100693e-040,  -2.299904345391321e-063,  3.6506201437945798e-086,  1.1875228833981544e-109,
+   -5.0644902316928607e-132, -6.7156837247865426e-155, -2.812077463003139e-178,  -5.7778912386589953e-201,
+   7.4997100559334532e-224,  -4.6439668915134491e-247, -6.3691100762962136e-270, -9.436808465446358e-293,
+   8.0970921678014997e-317
+};
+
+#if defined(_MSC_VER) && (_MSC_VER <= 1200)
+static stbsp__uint64 const stbsp__powten[20] = {
+   1,
+   10,
+   100,
+   1000,
+   10000,
+   100000,
+   1000000,
+   10000000,
+   100000000,
+   1000000000,
+   10000000000,
+   100000000000,
+   1000000000000,
+   10000000000000,
+   100000000000000,
+   1000000000000000,
+   10000000000000000,
+   100000000000000000,
+   1000000000000000000,
+   10000000000000000000U
+};
+#define stbsp__tento19th ((stbsp__uint64)1000000000000000000)
+#else
+static stbsp__uint64 const stbsp__powten[20] = {
+   1,
+   10,
+   100,
+   1000,
+   10000,
+   100000,
+   1000000,
+   10000000,
+   100000000,
+   1000000000,
+   10000000000ULL,
+   100000000000ULL,
+   1000000000000ULL,
+   10000000000000ULL,
+   100000000000000ULL,
+   1000000000000000ULL,
+   10000000000000000ULL,
+   100000000000000000ULL,
+   1000000000000000000ULL,
+   10000000000000000000ULL
+};
+#define stbsp__tento19th (1000000000000000000ULL)
+#endif
+
+#define stbsp__ddmulthi(oh, ol, xh, yh)                            \
+   {                                                               \
+      double ahi = 0, alo, bhi = 0, blo;                           \
+      stbsp__int64 bt;                                             \
+      oh = xh * yh;                                                \
+      STBSP__COPYFP(bt, xh);                                       \
+      bt &= ((~(stbsp__uint64)0) << 27);                           \
+      STBSP__COPYFP(ahi, bt);                                      \
+      alo = xh - ahi;                                              \
+      STBSP__COPYFP(bt, yh);                                       \
+      bt &= ((~(stbsp__uint64)0) << 27);                           \
+      STBSP__COPYFP(bhi, bt);                                      \
+      blo = yh - bhi;                                              \
+      ol = ((ahi * bhi - oh) + ahi * blo + alo * bhi) + alo * blo; \
+   }
+
+#define stbsp__ddtoS64(ob, xh, xl)          \
+   {                                        \
+      double ahi = 0, alo, vh, t;           \
+      ob = (stbsp__int64)xh;                \
+      vh = (double)ob;                      \
+      ahi = (xh - vh);                      \
+      t = (ahi - xh);                       \
+      alo = (xh - (ahi - t)) - (vh + t);    \
+      ob += (stbsp__int64)(ahi + alo + xl); \
+   }
+
+#define stbsp__ddrenorm(oh, ol) \
+   {                            \
+      double s;                 \
+      s = oh + ol;              \
+      ol = ol - (s - oh);       \
+      oh = s;                   \
+   }
+
+#define stbsp__ddmultlo(oh, ol, xh, xl, yh, yl) ol = ol + (xh * yl + xl * yh);
+
+#define stbsp__ddmultlos(oh, ol, xh, yl) ol = ol + (xh * yl);
+
+static void stbsp__raise_to_power10(double *ohi, double *olo, double d, stbsp__int32 power) // power can be -323 to +350
+{
+   double ph, pl;
+   if ((power >= 0) && (power <= 22)) {
+      stbsp__ddmulthi(ph, pl, d, stbsp__bot[power]);
+   } else {
+      stbsp__int32 e, et, eb;
+      double p2h, p2l;
+
+      e = power;
+      if (power < 0)
+         e = -e;
+      et = (e * 0x2c9) >> 14; /* %23 */
+      if (et > 13)
+         et = 13;
+      eb = e - (et * 23);
+
+      ph = d;
+      pl = 0.0;
+      if (power < 0) {
+         if (eb) {
+            --eb;
+            stbsp__ddmulthi(ph, pl, d, stbsp__negbot[eb]);
+            stbsp__ddmultlos(ph, pl, d, stbsp__negboterr[eb]);
+         }
+         if (et) {
+            stbsp__ddrenorm(ph, pl);
+            --et;
+            stbsp__ddmulthi(p2h, p2l, ph, stbsp__negtop[et]);
+            stbsp__ddmultlo(p2h, p2l, ph, pl, stbsp__negtop[et], stbsp__negtoperr[et]);
+            ph = p2h;
+            pl = p2l;
+         }
+      } else {
+         if (eb) {
+            e = eb;
+            if (eb > 22)
+               eb = 22;
+            e -= eb;
+            stbsp__ddmulthi(ph, pl, d, stbsp__bot[eb]);
+            if (e) {
+               stbsp__ddrenorm(ph, pl);
+               stbsp__ddmulthi(p2h, p2l, ph, stbsp__bot[e]);
+               stbsp__ddmultlos(p2h, p2l, stbsp__bot[e], pl);
+               ph = p2h;
+               pl = p2l;
+            }
+         }
+         if (et) {
+            stbsp__ddrenorm(ph, pl);
+            --et;
+            stbsp__ddmulthi(p2h, p2l, ph, stbsp__top[et]);
+            stbsp__ddmultlo(p2h, p2l, ph, pl, stbsp__top[et], stbsp__toperr[et]);
+            ph = p2h;
+            pl = p2l;
+         }
+      }
+   }
+   stbsp__ddrenorm(ph, pl);
+   *ohi = ph;
+   *olo = pl;
+}
+
+// given a float value, returns the significant bits in bits, and the position of the
+//   decimal point in decimal_pos.  +/-INF and NAN are specified by special values
+//   returned in the decimal_pos parameter.
+// frac_digits is absolute normally, but if you want from first significant digits (got %g and %e), or in 0x80000000
+static stbsp__int32 stbsp__real_to_str(char const **start, stbsp__uint32 *len, char *out, stbsp__int32 *decimal_pos, double value, stbsp__uint32 frac_digits)
+{
+   double d;
+   stbsp__int64 bits = 0;
+   stbsp__int32 expo, e, ng, tens;
+
+   d = value;
+   STBSP__COPYFP(bits, d);
+   expo = (stbsp__int32)((bits >> 52) & 2047);
+   ng = (stbsp__int32)((stbsp__uint64) bits >> 63);
+   if (ng)
+      d = -d;
+
+   if (expo == 2047) // is nan or inf?
+   {
+      *start = (bits & ((((stbsp__uint64)1) << 52) - 1)) ? "NaN" : "Inf";
+      *decimal_pos = STBSP__SPECIAL;
+      *len = 3;
+      return ng;
+   }
+
+   if (expo == 0) // is zero or denormal
+   {
+      if (((stbsp__uint64) bits << 1) == 0) // do zero
+      {
+         *decimal_pos = 1;
+         *start = out;
+         out[0] = '0';
+         *len = 1;
+         return ng;
+      }
+      // find the right expo for denormals
+      {
+         stbsp__int64 v = ((stbsp__uint64)1) << 51;
+         while ((bits & v) == 0) {
+            --expo;
+            v >>= 1;
+         }
+      }
+   }
+
+   // find the decimal exponent as well as the decimal bits of the value
+   {
+      double ph, pl;
+
+      // log10 estimate - very specifically tweaked to hit or undershoot by no more than 1 of log10 of all expos 1..2046
+      tens = expo - 1023;
+      tens = (tens < 0) ? ((tens * 617) / 2048) : (((tens * 1233) / 4096) + 1);
+
+      // move the significant bits into position and stick them into an int
+      stbsp__raise_to_power10(&ph, &pl, d, 18 - tens);
+
+      // get full as much precision from double-double as possible
+      stbsp__ddtoS64(bits, ph, pl);
+
+      // check if we undershot
+      if (((stbsp__uint64)bits) >= stbsp__tento19th)
+         ++tens;
+   }
+
+   // now do the rounding in integer land
+   frac_digits = (frac_digits & 0x80000000) ? ((frac_digits & 0x7ffffff) + 1) : (tens + frac_digits);
+   if ((frac_digits < 24)) {
+      stbsp__uint32 dg = 1;
+      if ((stbsp__uint64)bits >= stbsp__powten[9])
+         dg = 10;
+      while ((stbsp__uint64)bits >= stbsp__powten[dg]) {
+         ++dg;
+         if (dg == 20)
+            goto noround;
+      }
+      if (frac_digits < dg) {
+         stbsp__uint64 r;
+         // add 0.5 at the right position and round
+         e = dg - frac_digits;
+         if ((stbsp__uint32)e >= 24)
+            goto noround;
+         r = stbsp__powten[e];
+         bits = bits + (r / 2);
+         if ((stbsp__uint64)bits >= stbsp__powten[dg])
+            ++tens;
+         bits /= r;
+      }
+   noround:;
+   }
+
+   // kill long trailing runs of zeros
+   if (bits) {
+      stbsp__uint32 n;
+      for (;;) {
+         if (bits <= 0xffffffff)
+            break;
+         if (bits % 1000)
+            goto donez;
+         bits /= 1000;
+      }
+      n = (stbsp__uint32)bits;
+      while ((n % 1000) == 0)
+         n /= 1000;
+      bits = n;
+   donez:;
+   }
+
+   // convert to string
+   out += 64;
+   e = 0;
+   for (;;) {
+      stbsp__uint32 n;
+      char *o = out - 8;
+      // do the conversion in chunks of U32s (avoid most 64-bit divides, worth it, constant denomiators be damned)
+      if (bits >= 100000000) {
+         n = (stbsp__uint32)(bits % 100000000);
+         bits /= 100000000;
+      } else {
+         n = (stbsp__uint32)bits;
+         bits = 0;
+      }
+      while (n) {
+         out -= 2;
+         *(stbsp__uint16 *)out = *(stbsp__uint16 *)&stbsp__digitpair.pair[(n % 100) * 2];
+         n /= 100;
+         e += 2;
+      }
+      if (bits == 0) {
+         if ((e) && (out[0] == '0')) {
+            ++out;
+            --e;
+         }
+         break;
+      }
+      while (out != o) {
+         *--out = '0';
+         ++e;
+      }
+   }
+
+   *decimal_pos = tens;
+   *start = out;
+   *len = e;
+   return ng;
+}
+
+#undef stbsp__ddmulthi
+#undef stbsp__ddrenorm
+#undef stbsp__ddmultlo
+#undef stbsp__ddmultlos
+#undef STBSP__SPECIAL
+#undef STBSP__COPYFP
+
+#endif // STB_SPRINTF_NOFLOAT
+
+// clean up
+#undef stbsp__uint16
+#undef stbsp__uint32
+#undef stbsp__int32
+#undef stbsp__uint64
+#undef stbsp__int64
+#undef STBSP__UNALIGNED
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#endif
+
+#endif // STB_SPRINTF_IMPLEMENTATION
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
+software, either in source code form or as a compiled binary, for any purpose,
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this
+software dedicate any and all copyright interest in the software to the public
+domain. We make this dedication for the benefit of the public at large and to
+the detriment of our heirs and successors. We intend this dedication to be an
+overt act of relinquishment in perpetuity of all present and future rights to
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/
diff --git a/sockd.c b/sockd.c
index ede55c9..5088442 100644
--- a/sockd.c
+++ b/sockd.c
@@ -23,10 +23,10 @@
 #include <linux/filter.h>
 #include <pwd.h>
 #include <grp.h>
+#include "nk/stb_sprintf.h"
 #include "nk/log.h"
 #include "nk/io.h"
 #include "nk/privs.h"
-
 #include "sockd.h"
 #include "ndhc-defines.h"
 #include "ndhc.h"
@@ -142,7 +142,7 @@ static int create_udp_socket(uint32_t ip, uint16_t port, char *iface)
     }
     struct ifreq ifr;
     memset(&ifr, 0, sizeof ifr);
-    ssize_t sl = snprintf(ifr.ifr_name, sizeof ifr.ifr_name, "%s", iface);
+    ssize_t sl = stbsp_snprintf(ifr.ifr_name, sizeof ifr.ifr_name, "%s", iface);
     if (sl < 0 || (size_t)sl > sizeof ifr.ifr_name) {
         log_line("%s: (%s) Set interface name failed.",
                  client_config.interface, __func__);