diff options
Diffstat (limited to 'nscd/connections.c')
| -rw-r--r-- | nscd/connections.c | 46 |
1 files changed, 25 insertions, 21 deletions
diff --git a/nscd/connections.c b/nscd/connections.c index 8140e96..5da5e5f 100644 --- a/nscd/connections.c +++ b/nscd/connections.c @@ -1,6 +1,5 @@ /* Inner loops of cache daemon. - Copyright (C) 1998-2003, 2004, 2005, 2006, 2007, 2008 - Free Software Foundation, Inc. + Copyright (C) 1998-2007, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -112,7 +111,8 @@ struct database_dyn dbs[lastdb] = .propagate = 1, .shared = 0, .max_db_size = DEFAULT_MAX_DB_SIZE, - .reset_res = 0, + .suggested_module = DEFAULT_SUGGESTED_MODULE, + .reset_res = 0, .filename = "/etc/passwd", .db_filename = _PATH_NSCD_PASSWD_DB, .disabled_iov = &pwd_iov_disabled, @@ -131,6 +131,7 @@ struct database_dyn dbs[lastdb] = .propagate = 1, .shared = 0, .max_db_size = DEFAULT_MAX_DB_SIZE, + .suggested_module = DEFAULT_SUGGESTED_MODULE, .reset_res = 0, .filename = "/etc/group", .db_filename = _PATH_NSCD_GROUP_DB, @@ -150,6 +151,7 @@ struct database_dyn dbs[lastdb] = .propagate = 0, /* Not used. */ .shared = 0, .max_db_size = DEFAULT_MAX_DB_SIZE, + .suggested_module = DEFAULT_SUGGESTED_MODULE, .reset_res = 1, .filename = "/etc/hosts", .db_filename = _PATH_NSCD_HOSTS_DB, @@ -169,6 +171,7 @@ struct database_dyn dbs[lastdb] = .propagate = 0, /* Not used. */ .shared = 0, .max_db_size = DEFAULT_MAX_DB_SIZE, + .suggested_module = DEFAULT_SUGGESTED_MODULE, .reset_res = 0, .filename = "/etc/services", .db_filename = _PATH_NSCD_SERVICES_DB, @@ -346,7 +349,7 @@ verify_persistent_db (void *mem, struct database_pers_head *readhead, int dbnr) struct database_pers_head head_copy = *head; /* Check that the header that was read matches the head in the database. */ - if (readhead != NULL && memcmp (head, readhead, sizeof (*head)) != 0) + if (memcmp (head, readhead, sizeof (*head)) != 0) return 0; /* First some easy tests: make sure the database header is sane. */ @@ -356,6 +359,7 @@ verify_persistent_db (void *mem, struct database_pers_head *readhead, int dbnr) This should cover daylight saving time changes. */ || head->timestamp > now + 60 * 60 + 60 || (head->gc_cycle & 1) + || head->module == 0 || (size_t) head->module > INT32_MAX / sizeof (ref_t) || (size_t) head->data_size > INT32_MAX - head->module * sizeof (ref_t) || head->first_free < 0 @@ -506,6 +510,7 @@ nscd_init (void) int fd = open (dbs[cnt].db_filename, O_RDWR | EXTRA_O_FLAGS); if (fd != -1) { + char *msg = NULL; struct stat64 st; void *mem; size_t total; @@ -514,23 +519,26 @@ nscd_init (void) sizeof (head))); if (n != sizeof (head) || fstat64 (fd, &st) != 0) { + fail_db_errno: + /* The code is single-threaded at this point so + using strerror is just fine. */ + msg = strerror (errno); fail_db: dbg_log (_("invalid persistent database file \"%s\": %s"), - dbs[cnt].db_filename, strerror (errno)); + dbs[cnt].db_filename, msg); unlink (dbs[cnt].db_filename); } else if (head.module == 0 && head.data_size == 0) { - /* The file has been created, but the head has not been - initialized yet. Remove the old file. */ - unlink (dbs[cnt].db_filename); + /* The file has been created, but the head has not + been initialized yet. */ + msg = _("uninitialized header"); + goto fail_db; } else if (head.header_size != (int) sizeof (head)) { - dbg_log (_("invalid persistent database file \"%s\": %s"), - dbs[cnt].db_filename, - _("header size does not match")); - unlink (dbs[cnt].db_filename); + msg = _("header size does not match"); + goto fail_db; } else if ((total = (sizeof (head) + roundup (head.module * sizeof (ref_t), @@ -539,10 +547,8 @@ nscd_init (void) > st.st_size || total < sizeof (head)) { - dbg_log (_("invalid persistent database file \"%s\": %s"), - dbs[cnt].db_filename, - _("file size does not match")); - unlink (dbs[cnt].db_filename); + msg = _("file size does not match"); + goto fail_db; } /* Note we map with the maximum size allowed for the database. This is likely much larger than the @@ -554,14 +560,12 @@ nscd_init (void) PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) - goto fail_db; + goto fail_db_errno; else if (!verify_persistent_db (mem, &head, cnt)) { munmap (mem, total); - dbg_log (_("invalid persistent database file \"%s\": %s"), - dbs[cnt].db_filename, - _("verification failed")); - unlink (dbs[cnt].db_filename); + msg = _("verification failed"); + goto fail_db; } else { |