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author | Ulrich Drepper <drepper@redhat.com> | 2004-09-30 08:08:40 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2004-09-30 08:08:40 +0000 |
commit | 0891f9706f4fc0951324b3a3f113f60191b96434 (patch) | |
tree | 48a72b0e6dfe0ee3564e3c810dea939b57d1a96a /nscd/nscd_getgr_r.c | |
parent | 085f2dd0ad1ba523749669b24f0999a3d1496ed7 (diff) | |
download | glibc-0891f9706f4fc0951324b3a3f113f60191b96434.zip glibc-0891f9706f4fc0951324b3a3f113f60191b96434.tar.gz glibc-0891f9706f4fc0951324b3a3f113f60191b96434.tar.bz2 |
Update.
2004-09-30 Ulrich Drepper <drepper@redhat.com>
* nscd/nscd-client.h (__nscd_get_map_ref): Drop volatile from last
parameter.
(__nscd_drop_map_ref): Change second parameter to be a referenc to
a variable. Update variable when cycle count changed.
* nscd/nscd_helper.c (__nscd_get_map_ref): Remove volatile here, too.
* nscd/nscd_getai.c: Correctly use __nscd_drop_map_ref. Reinitialize
all variables and avoid memory leak in case of retries.
* nscd/nscd_getgr_r.c: Likewise.
* nscd/nscd_gethst_r.c: Likewise.
* nscd/nscd_getpw_r.c: Likewise.
* nscd/nscd_initgroups.c: Likewise.
* nscd/nscd.h: Add declaretion of addinitgroups and
readdinitgroups.
Diffstat (limited to 'nscd/nscd_getgr_r.c')
-rw-r--r-- | nscd/nscd_getgr_r.c | 47 |
1 files changed, 33 insertions, 14 deletions
diff --git a/nscd/nscd_getgr_r.c b/nscd/nscd_getgr_r.c index 3a66bb8..9e8170f 100644 --- a/nscd/nscd_getgr_r.c +++ b/nscd/nscd_getgr_r.c @@ -18,6 +18,7 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <alloca.h> #include <assert.h> #include <errno.h> #include <grp.h> @@ -84,19 +85,21 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type, struct group *resultbuf, char *buffer, size_t buflen, struct group **result) { - const gr_response_header *gr_resp = NULL; - const uint32_t *len = NULL; - const char *gr_name = NULL; - size_t gr_name_len = 0; - int retval = -1; int gc_cycle; - const char *recend = (const char *) ~UINTMAX_C (0); + const uint32_t *len = NULL; + size_t lensize = 0; /* If the mapping is available, try to search there instead of communicating with the nscd. */ struct mapped_database *mapped = __nscd_get_map_ref (GETFDGR, "group", &map_handle, &gc_cycle); - retry: + retry:; + const gr_response_header *gr_resp = NULL; + const char *gr_name = NULL; + size_t gr_name_len = 0; + int retval = -1; + const char *recend = (const char *) ~UINTMAX_C (0); + if (mapped != NO_MAPPING) { const struct datahead *found = __nscd_cache_search (type, key, keylen, @@ -176,10 +179,17 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type, resultbuf->gr_gid = gr_resp->gr_gid; /* Read the length information, group name, and password. */ - if (len == NULL) + if (gr_name == NULL) { /* Allocate array to store lengths. */ - len = (uint32_t *) alloca (gr_resp->gr_mem_cnt * sizeof (uint32_t)); + if (lensize == 0) + { + lensize = gr_resp->gr_mem_cnt * sizeof (uint32_t); + len = (uint32_t *) alloca (lensize); + } + else if (gr_resp->gr_mem_cnt * sizeof (uint32_t) > lensize) + len = extend_alloca (len, lensize, + gr_resp->gr_mem_cnt * sizeof (uint32_t)); vec[0].iov_base = (void *) len; vec[0].iov_len = gr_resp->gr_mem_cnt * sizeof (uint32_t); @@ -248,11 +258,20 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type, if (sock != -1) close_not_cancel_no_status (sock); out: - if (__nscd_drop_map_ref (mapped, gc_cycle) != 0) - /* When we come here this means there has been a GC cycle while we - were looking for the data. This means the data might have been - inconsistent. Retry. */ - goto retry; + if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1) + { + /* When we come here this means there has been a GC cycle while we + were looking for the data. This means the data might have been + inconsistent. Retry if possible. */ + if ((gc_cycle & 1) != 0) + { + /* nscd is just running gc now. Disable using the mapping. */ + __nscd_unmap (mapped); + mapped = NO_MAPPING; + } + + goto retry; + } return retval; } |