* [PATCH] http_put: gracefully handle path allocation errors
@ 2016-06-01 22:32 Eric Wong
0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2016-06-01 22:32 UTC (permalink / raw)
To: cmogstored-public
Failing to allocate memory should be a temporary error and be
non-fatal.
---
http_put.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/http_put.c b/http_put.c
index 92bc435..5084090 100644
--- a/http_put.c
+++ b/http_put.c
@@ -306,6 +306,8 @@ MOG_NOINLINE static void rnd_init_per_thread(void)
static char *tmppath_for(struct mog_http *http, const char *path)
{
int32_t result;
+ int rc;
+ char *s;
if (!rnd.ready)
rnd_init_per_thread();
@@ -313,8 +315,10 @@ static char *tmppath_for(struct mog_http *http, const char *path)
assert(http && "validation later"); /* TODO */
CHECK(int, 0, random_r(&rnd.data, &result));
- return xasprintf("%s.%08x.%d.tmp",
- path, (unsigned)result, (int)getpid());
+ rc = asprintf(&s, "%s.%08x.%d.tmp",
+ path, (unsigned)result, (int)getpid());
+
+ return rc >= 0 ? s : 0;
}
static struct mog_file * open_put(struct mog_http *http, char *path)
@@ -337,12 +341,17 @@ static struct mog_file * open_put(struct mog_http *http, char *path)
char *tmp = tmppath_for(http, path);
int fl = O_EXCL | O_TRUNC | O_CREAT;
+ if (!tmp)
+ return NULL;
+
http->forward = mog_file_open_put(http->svc, tmp, fl);
/* retry once on EEXIST, don't inf loop if RNG is broken */
if (http->forward == NULL && errno == EEXIST) {
free(tmp);
tmp = tmppath_for(http, path);
+ if (!tmp)
+ return NULL;
http->forward = mog_file_open_put(http->svc, tmp, fl);
}
if (http->forward == NULL) {
--
EW
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2016-06-01 22:32 [PATCH] http_put: gracefully handle path allocation errors Eric Wong
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