From 2f094ae82106e91cb210e79ddc2e5285377b549e Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Sat, 7 Apr 2018 15:02:20 +0200
Subject: [PATCH] telnet: move winsize detection closer to I/O loop, delete
 non-functioning debug code

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 libbb/bb_askpass.c  | 12 +-----------
 networking/telnet.c | 17 +++++------------
 2 files changed, 6 insertions(+), 23 deletions(-)

diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
index aae35ec41..5599c82ef 100644
--- a/libbb/bb_askpass.c
+++ b/libbb/bb_askpass.c
@@ -37,15 +37,6 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
 
 	tcgetattr(fd, &oldtio);
 	tio = oldtio;
-#if 0
-	/* Switch off UPPERCASE->lowercase conversion (never used since 198x)
-	 * and XON/XOFF (why we want to mess with this??)
-	 */
-# ifndef IUCLC
-#  define IUCLC 0
-# endif
-	tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
-#endif
 	/* Switch off echo */
 	tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL);
 	tcsetattr(fd, TCSANOW, &tio);
@@ -66,9 +57,8 @@ char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
 	while (1) {
 		int r = read(fd, &ret[i], 1);
 		if ((i == 0 && r == 0) /* EOF (^D) with no password */
-		 || r < 0
+		 || r < 0 /* read is interrupted by timeout or ^C */
 		) {
-			/* read is interrupted by timeout or ^C */
 			ret = NULL;
 			break;
 		}
diff --git a/networking/telnet.c b/networking/telnet.c
index 8b0df7f5c..15d6a08d8 100644
--- a/networking/telnet.c
+++ b/networking/telnet.c
@@ -89,12 +89,6 @@
 # define TELOPT_NAWS  31  /* window size */
 #endif
 
-#ifdef DOTRACE
-# define TRACE(x, y) do { if (x) printf y; } while (0)
-#else
-# define TRACE(x, y)
-#endif
-
 enum {
 	DATABUFSIZE = 128,
 	IACBUFSIZE  = 128,
@@ -627,10 +621,6 @@ int telnet_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-#if ENABLE_FEATURE_TELNET_WIDTH
-	get_terminal_width_height(0, &G.win_width, &G.win_height);
-#endif
-
 #if ENABLE_FEATURE_TELNET_TTYPE
 	G.ttype = getenv("TERM");
 #endif
@@ -661,6 +651,11 @@ int telnet_main(int argc UNUSED_PARAM, char **argv)
 
 	setsockopt_keepalive(netfd);
 
+#if ENABLE_FEATURE_TELNET_WIDTH
+	get_terminal_width_height(0, &G.win_width, &G.win_height);
+//TODO: support dynamic resize?
+#endif
+
 	signal(SIGINT, record_signo);
 
 	ufds[0].fd = STDIN_FILENO;
@@ -684,7 +679,6 @@ int telnet_main(int argc UNUSED_PARAM, char **argv)
 			len = safe_read(STDIN_FILENO, G.buf, DATABUFSIZE);
 			if (len <= 0)
 				doexit(EXIT_SUCCESS);
-			TRACE(0, ("Read con: %d\n", len));
 			handle_net_output(len);
 		}
 
@@ -694,7 +688,6 @@ int telnet_main(int argc UNUSED_PARAM, char **argv)
 				full_write1_str("Connection closed by foreign host\r\n");
 				doexit(EXIT_FAILURE);
 			}
-			TRACE(0, ("Read netfd (%d): %d\n", netfd, len));
 			handle_net_input(len);
 		}
 	} /* while (1) */