commit d6ea0a1a61853dd892029a7126e7fdb70c371878
from: Jan Klemkow <j.klemkow@wemelug.de>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Wed Apr 29 23:21:21 2020 UTC

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.

commit - 43a395ae91f7d67ce694e65edeaa7bbc720dd027
commit + d6ea0a1a61853dd892029a7126e7fdb70c371878
blob - 0ce6ac24591968723c7b70e5cb0af992df8e67b5
blob + 2bf133f4ad99686b1c34f08c0dfa9ad1027f2840
--- st.c
+++ 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