Description: sshd: Ignore subsequent SIGHUPs during re-exec
 Prevents two HUPs in quick succession from resulting in sshd dying.
Author: Colin Watson <cjwatson@debian.org>
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1692
Bug-Ubuntu: https://bugs.launchpad.net/bugs/497781
Last-Update: 2010-02-28

Index: b/sshd.c
===================================================================
--- a/sshd.c
+++ b/sshd.c
@@ -318,6 +318,7 @@
 	close_listen_socks();
 	close_startup_pipes();
 	alarm(0);  /* alarm timer persists across exec */
+	signal(SIGHUP, SIG_IGN); /* will be restored after exec */
 	execv(saved_argv[0], saved_argv);
 	logit("RESTART FAILED: av[0]='%.100s', error: %.100s.", saved_argv[0],
 	    strerror(errno));