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-rw-r--r--networking/telnet.c14
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();