ffmpeg: use isatty() before messing with the terminal state

This fixes terminal messup in case of crashes (like in make fate)

Reviewed-by: François Revol <revol@free.fr>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 3 insertions, 1 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index 95f3e521b3..914bc6adb4 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -1217,7 +1217,9 @@ static void term_init(void)
 #if HAVE_TERMIOS_H
     if(!run_as_daemon){
         struct termios tty;
-
+#if HAVE_ISATTY
+        if(isatty(0) && isatty(2))
+#endif
         if (tcgetattr (0, &tty) == 0) {
             oldtty = tty;
             restore_tty = 1;