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Diffstat (limited to 'miscutils/chat.c')
-rw-r--r--miscutils/chat.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/miscutils/chat.c b/miscutils/chat.c
index 1446a04..2dfe52c 100644
--- a/miscutils/chat.c
+++ b/miscutils/chat.c
@@ -238,10 +238,18 @@ int chat_main(int argc UNUSED_PARAM, char **argv)
, *argv
);
if (key >= 0) {
+ bool onoff;
// cache directive value
char *arg = *++argv;
+
+ if (!arg) {
+#if ENABLE_FEATURE_CHAT_TTY_HIFI
+ tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio0);
+#endif
+ bb_show_usage();
+ }
// OFF -> 0, anything else -> 1
- bool onoff = (0 != strcmp("OFF", arg));
+ onoff = (0 != strcmp("OFF", arg));
// process directive
if (DIR_HANGUP == key) {
// turn SIGHUP on/off