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136 lines
4.2 KiB

commit 9a3c6a6ff602c88d7155139a7d7d0000b7b7e946
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date: Thu Jan 2 10:05:27 2014 +0530
Fix return code from getent netgroup when the netgroup is not found (bz #16366)
diff -pruN glibc-2.17-c758a686/nscd/netgroupcache.c glibc-2.17-c758a686/nscd/netgroupcache.c
--- glibc-2.17-c758a686/nscd/netgroupcache.c 2013-12-03 20:41:12.000000000 -0500
+++ glibc-2.17-c758a686/nscd/netgroupcache.c 2013-12-19 08:36:52.253000000 -0500
@@ -65,6 +65,55 @@ struct dataset
char strdata[0];
};
+/* Sends a notfound message and prepares a notfound dataset to write to the
+ cache. Returns true if there was enough memory to allocate the dataset and
+ returns the dataset in DATASETP, total bytes to write in TOTALP and the
+ timeout in TIMEOUTP. KEY_COPY is set to point to the copy of the key in the
+ dataset. */
+static bool
+do_notfound (struct database_dyn *db, int fd, request_header *req,
+ const char *key, struct dataset **datasetp, ssize_t *totalp,
+ time_t *timeoutp, char **key_copy)
+{
+ struct dataset *dataset;
+ ssize_t total;
+ time_t timeout;
+ bool cacheable = false;
+
+ total = sizeof (notfound);
+ timeout = time (NULL) + db->negtimeout;
+
+ if (fd != -1)
+ TEMP_FAILURE_RETRY (send (fd, &notfound, total, MSG_NOSIGNAL));
+
+ dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1);
+ /* If we cannot permanently store the result, so be it. */
+ if (dataset != NULL)
+ {
+ dataset->head.allocsize = sizeof (struct dataset) + req->key_len;
+ dataset->head.recsize = total;
+ dataset->head.notfound = true;
+ dataset->head.nreloads = 0;
+ dataset->head.usable = true;
+
+ /* Compute the timeout time. */
+ timeout = dataset->head.timeout = time (NULL) + db->negtimeout;
+ dataset->head.ttl = db->negtimeout;
+
+ /* This is the reply. */
+ memcpy (&dataset->resp, &notfound, total);
+
+ /* Copy the key data. */
+ memcpy (dataset->strdata, key, req->key_len);
+ *key_copy = dataset->strdata;
+
+ cacheable = true;
+ }
+ *timeoutp = timeout;
+ *totalp = total;
+ *datasetp = dataset;
+ return cacheable;
+}
static time_t
addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
@@ -84,6 +133,7 @@ addgetnetgrentX (struct database_dyn *db
struct dataset *dataset;
bool cacheable = false;
ssize_t total;
+ bool found = false;
char *key_copy = NULL;
struct __netgrent data;
@@ -103,35 +153,8 @@ addgetnetgrentX (struct database_dyn *db
&& __nss_database_lookup ("netgroup", NULL, NULL, &netgroup_database))
{
/* No such service. */
- total = sizeof (notfound);
- timeout = time (NULL) + db->negtimeout;
-
- if (fd != -1)
- TEMP_FAILURE_RETRY (send (fd, &notfound, total, MSG_NOSIGNAL));
-
- dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len, 1);
- /* If we cannot permanently store the result, so be it. */
- if (dataset != NULL)
- {
- dataset->head.allocsize = sizeof (struct dataset) + req->key_len;
- dataset->head.recsize = total;
- dataset->head.notfound = true;
- dataset->head.nreloads = 0;
- dataset->head.usable = true;
-
- /* Compute the timeout time. */
- timeout = dataset->head.timeout = time (NULL) + db->negtimeout;
- dataset->head.ttl = db->negtimeout;
-
- /* This is the reply. */
- memcpy (&dataset->resp, &notfound, total);
-
- /* Copy the key data. */
- memcpy (dataset->strdata, key, req->key_len);
-
- cacheable = true;
- }
-
+ cacheable = do_notfound (db, fd, req, key, &dataset, &total, &timeout,
+ &key_copy);
goto writeout;
}
@@ -167,6 +190,7 @@ addgetnetgrentX (struct database_dyn *db
if (status == NSS_STATUS_SUCCESS)
{
+ found = true;
union
{
enum nss_status (*f) (struct __netgrent *, char *, size_t,
@@ -325,6 +349,15 @@ addgetnetgrentX (struct database_dyn *db
}
}
+ /* No results. Return a failure and write out a notfound record in the
+ cache. */
+ if (!found)
+ {
+ cacheable = do_notfound (db, fd, req, key, &dataset, &total, &timeout,
+ &key_copy);
+ goto writeout;
+ }
+
total = buffilled;
/* Fill in the dataset. */