[Sheepdog] [PATCH] sheep: abort when sheep cannot get the latest epoch

[MORITA Kazutaka]

Because any number could be used as an epoch number, it causes a
problem to return -1 when error occurs.

It is a fatal error if we cannot get the latest epoch number, so we
should kill the process in this case.

Signed-off-by: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
---
 sheep/store.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/sheep/store.c b/sheep/store.c
index 82176a5..eb1d4f1 100644
--- a/sheep/store.c
+++ b/sheep/store.c
@@ -902,8 +902,10 @@ int get_latest_epoch(void)
 	uint32_t e, epoch = 0;
 
 	dir = opendir(epoch_path);
-	if (!dir)
-		return -1;
+	if (!dir) {
+		vprintf(SDOG_EMERG "failed to get the latest epoch, %m\n");
+		abort();
+	}
 
 	while ((d = readdir(dir))) {
 		e = atoi(d->d_name);
-- 
1.7.2.5