diff options
Diffstat (limited to 'nss/nss_db/db-alias.c')
| -rw-r--r-- | nss/nss_db/db-alias.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/nss/nss_db/db-alias.c b/nss/nss_db/db-alias.c deleted file mode 100644 index de468cc..0000000 --- a/nss/nss_db/db-alias.c +++ /dev/null @@ -1,215 +0,0 @@ -/* Mail alias file parser in nss_db module. - Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <aliases.h> -#include <alloca.h> -#include <ctype.h> -#include <dlfcn.h> -#include <errno.h> -#include <bits/libc-lock.h> -#include <paths.h> -#include <string.h> - -#include "nsswitch.h" -#include "nss_db.h" - -/* Locks the static variables in this file. */ -__libc_lock_define_initialized (static, lock) - -/* Maintenance of the shared handle open on the database. */ - -static NSS_DB *db; -static int keep_db; -static unsigned int entidx; /* Index for `getaliasent_r'. */ - - -/* Open database. */ -enum nss_status -_nss_db_setaliasent (int stayopen) -{ - enum nss_status status; - - __libc_lock_lock (lock); - - status = internal_setent (_PATH_VARDB "aliases.db", &db); - - /* Remember STAYOPEN flag. */ - if (db != NULL) - keep_db |= stayopen; - - /* Reset the sequential index. */ - entidx = 0; - - __libc_lock_unlock (lock); - - return status; -} - - -/* Close it again. */ -enum nss_status -_nss_db_endaliasent (void) -{ - __libc_lock_lock (lock); - - internal_endent (&db); - - /* Reset STAYOPEN flag. */ - keep_db = 0; - - __libc_lock_unlock (lock); - - return NSS_STATUS_SUCCESS; -} - -/* We provide the parse function here. The parser in libnss_files - cannot be used. The generation of the db file already resolved all - :include: statements so we simply have to parse the list and store - the result. */ -static enum nss_status -lookup (DBT *key, struct aliasent *result, char *buffer, - size_t buflen, int *errnop) -{ - enum nss_status status; - DBT value; - - /* Open the database. */ - if (db == NULL) - { - status = internal_setent (_PATH_VARDB "aliases.db", &db); - if (status != NSS_STATUS_SUCCESS) - { - *errnop = errno; - return status; - } - } - - value.flags = 0; - if (DL_CALL_FCT (db->get, (db->db, NULL, key, &value, 0)) == 0) - { - const char *src = value.data; - char *cp; - size_t cnt; - - result->alias_members_len = 0; - - /* We now have to fill the BUFFER with all the information. */ - if (buflen < key->size + 1) - { - no_more_room: - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - - buffer = stpncpy (buffer, key->data, key->size) + 1; - buflen -= key->size + 1; - - while (*src != '\0') - { - const char *end, *upto; - while (isspace (*src)) - ++src; - - end = strchr (src, ','); - if (end == NULL) - end = strchr (src, '\0'); - for (upto = end; upto > src && isspace (upto[-1]); --upto); - - if (upto != src) - { - if ((upto - src) + __alignof__ (char *) > buflen) - goto no_more_room; - buffer = stpncpy (buffer, src, upto - src) + 1; - buflen -= (upto - src) + __alignof (char *); - ++result->alias_members_len; - } - src = end + (*end != '\0'); - } - - /* Now prepare the return. Provide string pointers for the - currently selected aliases. */ - - /* Adjust the pointer so it is aligned for storing pointers. */ - buffer += __alignof__ (char *) - 1; - buffer -= ((buffer - (char *) 0) % __alignof__ (char *)); - result->alias_members = (char **) buffer; - - /* Compute addresses of alias entry strings. */ - cp = result->alias_name; - for (cnt = 0; cnt < result->alias_members_len; ++cnt) - { - cp = strchr (cp, '\0') + 1; - result->alias_members[cnt] = cp; - } - - status = (result->alias_members_len == 0 - ? NSS_STATUS_RETURN : NSS_STATUS_SUCCESS); - } - else - status = NSS_STATUS_NOTFOUND; - - if (! keep_db) - internal_endent (&db); - - return status; -} - -enum nss_status -_nss_db_getaliasent_r (struct aliasent *result, char *buffer, size_t buflen, - int *errnop) -{ - /* Return next entry in alias file. */ - enum nss_status status; - char buf[20]; - DBT key; - - __libc_lock_lock (lock); - key.size = snprintf (key.data = buf, sizeof buf, "0%u", entidx++); - key.flags = 0; - status = lookup (&key, result, buffer, buflen, errnop); - if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE) - /* Give the user a chance to get the same entry with a larger buffer. */ - --entidx; - __libc_lock_unlock (lock); - - return status; -} - - -enum nss_status -_nss_db_getaliasbyname_r (const char *name, struct aliasent *result, - char *buffer, size_t buflen, int *errnop) -{ - DBT key; - enum nss_status status; - - key.size = 1 + strlen (name); - - key.data = __alloca (key.size); - ((char *) key.data)[0] = '.'; - memcpy (&((char *) key.data)[1], name, key.size - 1); - key.flags = 0; - - __libc_lock_lock (lock); - status = lookup (&key, result, buffer, buflen, errnop); - __libc_lock_unlock (lock); - - return status; -} |