[sheepdog] [PATCH 1/2] collie: clean signal handler register

[Hitoshi Mitake]

This patch does 2 trivial cleanings:
1. main() of collie doesn't need sa_old when it calls sigaction() for
   registering handler of SIGABRT
2. print string representation of errno in crash_handler(). It should
   print the value because abort() can be called with any reasons
   other than out of memory.

Cc: Harry Wei <harryxiyou at gmail.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>
---
 collie/collie.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/collie/collie.c b/collie/collie.c
index 15e24e6..5affb41 100644
--- a/collie/collie.c
+++ b/collie/collie.c
@@ -317,7 +317,7 @@ static const struct sd_option *build_sd_options(const char *opts)
 static void crash_handler(int signo)
 {
 	if (signo == SIGABRT)
-		fprintf(stderr, "collie abort.\n");
+		fprintf(stderr, "collie abort. errno: %m\n");
 	else
 		fprintf(stderr, "collie got unexpected signal %d.\n", signo);
 
@@ -333,7 +333,6 @@ int main(int argc, char **argv)
 	const char *short_options;
 	char *p;
 	const struct sd_option *sd_opts;
-	struct sigaction sa_old;
 	struct sigaction sa_new;
 
 	init_commands(&commands);
@@ -342,7 +341,7 @@ int main(int argc, char **argv)
 	sa_new.sa_flags = 0;
 	sigemptyset(&sa_new.sa_mask);
 
-	sigaction(SIGABRT, &sa_new, &sa_old);
+	sigaction(SIGABRT, &sa_new, NULL);
 
 	if (argc < 3)
 		usage(commands, 0);
-- 
1.7.5.1