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/* getugroups.c -- return a list of the groups a user is in
Copyright (C) 2007 INL
Written by Eric Leblond <regit@inl.fr>
$Id$
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 3 of the license.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/**
* \ingroup SystemModule
* @{
*/
/**
* \file getugroups.c
*
* \brief Contains getugroups() which is used to retrieve user's group
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "auth_srv.h"
#include <sys/types.h>
#include <stdio.h> /* grp.h on alpha OSF1 V2.0 uses "FILE *". */
#include <grp.h>
#define BUFLEN 4096
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
GStaticMutex group_mutex;
gint system_glibc_cant_guess_maxgroups;
/**
* \brief Get list of group a user belong to
*
* Like `getgroups', but for user USERNAME instead of for the current
process. If GID is not -1, store it first (if possible). GID should be the
group ID (pw_gid) obtained from getpwuid, in case USERNAME is not
listed in /etc/groups.
Always return the number of groups of which USERNAME is a member.
\param username String containing the username
\param gid This is the primary group of the user
\return A list of group under the form of a GSList
*/
GSList *getugroups(char *username, gid_t gid)
{
GSList *grouplist = NULL;
int i, ng = 0;
gid_t *groups = NULL;
/* need to lock as position is common to all thread */
g_static_mutex_lock(&group_mutex);
#ifdef PERF_DISPLAY_ENABLE
{
struct timeval tvstart, tvend, result;
if (nuauthconf->debug_areas & DEBUG_AREA_PERF) {
gettimeofday(&tvstart, NULL);
}
#endif
if (system_glibc_cant_guess_maxgroups) {
ng = system_glibc_cant_guess_maxgroups;
} else {
if (getgrouplist(username, gid, NULL, &ng) >= 0) {
return NULL;
}
}
groups = g_new0(gid_t, ng);
getgrouplist(username, gid, groups, &ng);
for (i = 0; i < ng; i++) {
grouplist =
g_slist_prepend(grouplist,
GINT_TO_POINTER(groups[i]));
}
g_free(groups);
#ifdef PERF_DISPLAY_ENABLE
if (nuauthconf->debug_areas & DEBUG_AREA_PERF) {
gettimeofday(&tvend, NULL);
timeval_substract(&result, &tvend, &tvstart);
log_message(INFO, DEBUG_AREA_PERF,
"Group list fetching duration: %.1f msec",
(double)result.tv_sec*1000+
(double)(result.tv_usec/1000));
}
}
#endif
/* release lock */
g_static_mutex_unlock(&group_mutex);
return grouplist;
}
/**
* @}
*/
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