applying fix for:

    0000026: poor man's "scriptable" telnet

1 files changed, 8 insertions, 6 deletions

diff --git a/networking/telnet.c b/networking/telnet.c
index 6ad7712ab..24160057b 100644
--- a/networking/telnet.c
+++ b/networking/telnet.c
@@ -96,6 +96,7 @@ static struct Globalvars {
         byte    charmode;
         byte    telflags;
         byte    gotsig;
+        byte    do_termios;
         /* buffer to handle telnet negotiations */
         char    iacbuf[IACBUFSIZE];
         short   iaclen; /* could even use byte */
@@ -616,12 +617,12 @@ static void fgotsig(int sig)
 
 static void rawmode(void)
 {
-        tcsetattr(0, TCSADRAIN, &G.termios_raw);
+        if (G.do_termios) tcsetattr(0, TCSADRAIN, &G.termios_raw);
 }
 
 static void cookmode(void)
 {
-        tcsetattr(0, TCSADRAIN, &G.termios_def);
+        if (G.do_termios) tcsetattr(0, TCSADRAIN, &G.termios_def);
 }
 
 extern int telnet_main(int argc, char** argv)
@@ -649,11 +650,12 @@ extern int telnet_main(int argc, char** argv)
 
         memset(&G, 0, sizeof G);
 
-        if (tcgetattr(0, &G.termios_def) < 0)
-                exit(1);
+        if (tcgetattr(0, &G.termios_def) >= 0) {
+                G.do_termios = 1;
 
-        G.termios_raw = G.termios_def;
-        cfmakeraw(&G.termios_raw);
+                G.termios_raw = G.termios_def;
+                cfmakeraw(&G.termios_raw);
+        }
 
         if (argc < 2)
                 bb_show_usage();