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From a91715df66fc2a0b7792e87a864c334f4cb15043 Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@debian.org>
Date: Sun, 9 Feb 2014 16:10:17 +0000
Subject: Support synchronisation with service supervisor using SIGSTOP
Author: Robie Basak <robie.basak@ubuntu.com>
Forwarded: no
Last-Update: 2014-04-14
Patch-Name: sigstop.patch
---
sshd.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/sshd.c b/sshd.c
index f2f54b51..a2ca2d3e 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1892,6 +1892,16 @@ main(int ac, char **av)
}
}
+ if (getenv("SSH_SIGSTOP")) {
+ /* Tell service supervisor that we are ready. */
+ kill(getpid(), SIGSTOP);
+ /* The service supervisor only ever expects a single
+ * STOP signal, so do not ever signal it again, even
+ * in the case of a re-exec or future children.
+ */
+ unsetenv("SSH_SIGSTOP");
+ }
+
/* Accept a connection and return in a forked child */
server_accept_loop(&sock_in, &sock_out,
&newsock, config_s);
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