replace exit(3) by _exit(2) in signal handler sigchld() - st

commit d6ea0a1a61853dd892029a7126e7fdb70c371878
parent 43a395ae91f7d67ce694e65edeaa7bbc720dd027
Author: Jan Klemkow <j.klemkow@wemelug.de>
Date:   Thu, 30 Apr 2020 00:10:02 +0200

replace exit(3) by _exit(2) in signal handler sigchld()

exit(3) is not async-signal-safe but, _exit(2) is.
This change prevents st to crash and dump core.

Diffstat:
M st.c  | 2 +-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/st.c b/st.c
@@ -730,7 +730,7 @@ sigchld(int a)
         die("child exited with status %d\n", WEXITSTATUS(stat));
     else if (WIFSIGNALED(stat))
         die("child terminated due to signal %d\n", WTERMSIG(stat));
-    exit(0);
+    _exit(0);
 }
 
 void