[sheepdog] [PATCH] shepherd: use install_crash_handler() from shepherd

[Hitoshi Mitake]

The utilities related to signals provided by libsheepdog.a is also
useful for shepherd. This patch lets shepherd use it.

Signed-off-by: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>
---
 shepherd/shepherd.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/shepherd/shepherd.c b/shepherd/shepherd.c
index 6f0c30a..6eef5a3 100644
--- a/shepherd/shepherd.c
+++ b/shepherd/shepherd.c
@@ -764,6 +764,16 @@ static int set_listen_fd_cb(int fd, void *data)
 	return 0;
 }
 
+static void crash_handler(int signo)
+{
+	sd_printf(SDOG_EMERG, "shepherd exits unexpectedly (%s).",
+		  strsignal(signo));
+
+	sd_backtrace();
+
+	reraise_crash_signal(signo, 1);
+}
+
 int main(int argc, char **argv)
 {
 	int ch, ret, longindex;
@@ -782,6 +792,8 @@ int main(int argc, char **argv)
 
 	progname = argv[0];
 
+	install_crash_handler(crash_handler);
+
 	long_options = build_long_options(shepherd_options);
 	short_options = build_short_options(shepherd_options);
 
-- 
1.7.5.1