busybox/miscutils/adjtimex.c

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/* vi: set sw=4 ts=4: */
/*
* adjtimex.c - read, and possibly modify, the Linux kernel 'timex' variables.
*
* Originally written: October 1997
* Last hack: March 2001
* Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
*
* busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config ADJTIMEX
//config: bool "adjtimex (4.7 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
//config: Adjtimex reads and optionally sets adjustment parameters for
//config: the Linux clock adjustment algorithm.
//applet:IF_ADJTIMEX(APPLET_NOFORK(adjtimex, adjtimex, BB_DIR_SBIN, BB_SUID_DROP, adjtimex))
//kbuild:lib-$(CONFIG_ADJTIMEX) += adjtimex.o
//usage:#define adjtimex_trivial_usage
//usage: "[-q] [-o OFF] [-f FREQ] [-p TCONST] [-t TICK]"
//usage:#define adjtimex_full_usage "\n\n"
//usage: "Read or set kernel time variables. See adjtimex(2)\n"
//usage: "\n -q Quiet"
//usage: "\n -o OFF Time offset, microseconds"
//usage: "\n -f FREQ Frequency adjust, integer kernel units (65536 is 1ppm)"
//usage: "\n -t TICK Microseconds per tick, usually 10000"
//usage: "\n (positive -t or -f values make clock run faster)"
//usage: "\n -p TCONST"
#include "libbb.h"
#ifdef __BIONIC__
# include <linux/timex.h>
#else
# include <sys/timex.h>
#endif
static const uint16_t statlist_bit[] ALIGN2 = {
STA_PLL,
STA_PPSFREQ,
STA_PPSTIME,
STA_FLL,
STA_INS,
STA_DEL,
STA_UNSYNC,
STA_FREQHOLD,
STA_PPSSIGNAL,
STA_PPSJITTER,
STA_PPSWANDER,
STA_PPSERROR,
STA_CLOCKERR,
0
};
static const char statlist_name[] ALIGN1 =
"PLL" "\0"
"PPSFREQ" "\0"
"PPSTIME" "\0"
"FFL" "\0"
"INS" "\0"
"DEL" "\0"
"UNSYNC" "\0"
"FREQHOLD" "\0"
"PPSSIGNAL" "\0"
"PPSJITTER" "\0"
"PPSWANDER" "\0"
"PPSERROR" "\0"
"CLOCKERR"
;
static const char ret_code_descript[] ALIGN1 =
"clock synchronized" "\0"
"insert leap second" "\0"
"delete leap second" "\0"
"leap second in progress" "\0"
"leap second has occurred" "\0"
"clock not synchronized"
;
int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int adjtimex_main(int argc UNUSED_PARAM, char **argv)
{
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enum {
OPT_quiet = 0x1
};
unsigned opt;
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char *opt_o, *opt_f, *opt_p, *opt_t;
struct timex txc;
int ret;
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const char *descript;
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memset(&txc, 0, sizeof(txc));
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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opt = getopt32(argv, "^" "qo:f:p:t:"
"\0" "=0"/*no valid non-option args*/,
&opt_o, &opt_f, &opt_p, &opt_t
);
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//if (opt & 0x1) // -q
if (opt & 0x2) { // -o
txc.offset = xatol(opt_o);
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txc.modes |= ADJ_OFFSET_SINGLESHOT;
}
if (opt & 0x4) { // -f
txc.freq = xatol(opt_f);
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txc.modes |= ADJ_FREQUENCY;
}
if (opt & 0x8) { // -p
txc.constant = xatol(opt_p);
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txc.modes |= ADJ_TIMECONST;
}
if (opt & 0x10) { // -t
txc.tick = xatol(opt_t);
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txc.modes |= ADJ_TICK;
}
/* It's NOFORK applet because the code is very simple:
* just some printf. No opens, no allocs.
* If you need to make it more complex, feel free to downgrade to NOEXEC
*/
ret = adjtimex(&txc);
if (ret < 0)
bb_perror_nomsg_and_die();
if (!(opt & OPT_quiet)) {
const char *sep;
const char *name;
int i;
printf(
" mode: %d\n"
"-o offset: %ld us\n"
"-f freq.adjust: %ld (65536 = 1ppm)\n"
" maxerror: %ld\n"
" esterror: %ld\n"
" status: %d (",
txc.modes, txc.offset, txc.freq, txc.maxerror,
txc.esterror, txc.status
);
/* representative output of next code fragment:
* "PLL | PPSTIME"
*/
name = statlist_name;
sep = "";
for (i = 0; statlist_bit[i]; i++) {
if (txc.status & statlist_bit[i]) {
printf("%s%s", sep, name);
sep = " | ";
}
name += strlen(name) + 1;
}
descript = "error";
if (ret <= 5)
descript = nth_string(ret_code_descript, ret);
printf(")\n"
"-p timeconstant: %ld\n"
" precision: %ld us\n"
" tolerance: %ld\n"
"-t tick: %ld us\n"
" time.tv_sec: %ld\n"
" time.tv_usec: %ld\n"
" return value: %d (%s)\n",
txc.constant,
txc.precision, txc.tolerance, txc.tick,
(long)txc.time.tv_sec, (long)txc.time.tv_usec,
ret, descript
);
}
return 0;
}