* nonlocal-group.c
* group database for nss_nonlocal proxy
*
- * Copyright © 2007 Anders Kaseorg <andersk@mit.edu> and Tim Abbott
- * <tabbott@mit.edu>
+ * Copyright © 2007–2010 Anders Kaseorg <andersk@mit.edu> and Tim
+ * Abbott <tabbott@mit.edu>
*
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
+ * This file is part of nss_nonlocal.
*
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
+ * nss_nonlocal 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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * nss_nonlocal 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 nss_nonlocal; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
*/
#define _GNU_SOURCE
return status;
}
+enum nss_status
+check_nonlocal_group(const char *user, struct group *grp, int *errnop)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+ int old_errno = errno;
+ char *end;
+ unsigned long gid;
+
+ errno = 0;
+ gid = strtoul(grp->gr_name, &end, 10);
+ if (errno == 0 && *end == '\0' && (gid_t)gid == gid)
+ status = check_nonlocal_gid(user, gid, errnop);
+ errno = old_errno;
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ return check_nonlocal_gid(user, grp->gr_gid, errnop);
+}
+
enum nss_status
get_local_group(const char *name, struct group *grp, char **buffer, int *errnop)
{
do
status = DL_CALL_FCT(grent_fct.l, (grp, buffer, buflen, errnop));
while (status == NSS_STATUS_SUCCESS &&
- check_nonlocal_gid("(unknown)", grp->gr_gid, &nonlocal_errno) != NSS_STATUS_SUCCESS);
+ check_nonlocal_group("(unknown)", grp, &nonlocal_errno) != NSS_STATUS_SUCCESS);
}
if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
return status;
return NSS_STATUS_NOTFOUND;
}
- return check_nonlocal_gid(name, grp->gr_gid, errnop);
+ return check_nonlocal_group(name, grp, errnop);
}
enum nss_status
if (status != NSS_STATUS_SUCCESS)
return status;
- return check_nonlocal_gid(grp->gr_name, grp->gr_gid, errnop);
+ if (gid != grp->gr_gid) {
+ syslog(LOG_ERR, "nss_nonlocal: discarding gid %d from lookup for gid %d\n", grp->gr_gid, gid);
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ return check_nonlocal_group(grp->gr_name, grp, errnop);
}
enum nss_status