/* group-member.c -- determine whether group id is in calling user's group list
- Copyright (C) 1994, 1997, 1998, 2003 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ Copyright (C) 1994, 1997-1998, 2003, 2005-2006, 2009-2011 Free Software
+ Foundation, Inc.
+
+ 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; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
-#include "group-member.h"
+/* Specification. */
+#include <unistd.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
#include "xalloc.h"
struct group_info
{
int n_groups;
- GETGROUPS_T *group;
+ gid_t *group;
};
-#if HAVE_GETGROUPS
-
static void
free_group_info (struct group_info const *g)
{
{
int n_groups;
int n_group_slots = getgroups (0, NULL);
- GETGROUPS_T *group;
+ gid_t *group;
if (n_group_slots < 0)
return false;
return true;
}
-#endif /* not HAVE_GETGROUPS */
-
/* Return non-zero if GID is one that we have in our groups list.
- If there is no getgroups function, return non-zero if GID matches
- either of the current or effective group IDs. */
+ Note that the groups list is not guaranteed to contain the current
+ or effective group ID, so they should generally be checked
+ separately. */
int
group_member (gid_t gid)
{
-#ifndef HAVE_GETGROUPS
- return ((gid == getgid ()) || (gid == getegid ()));
-#else
int i;
int found;
struct group_info gi;
for (i = 0; i < gi.n_groups; i++)
{
if (gid == gi.group[i])
- {
- found = 1;
- break;
- }
+ {
+ found = 1;
+ break;
+ }
}
free_group_info (&gi);
return found;
-#endif /* HAVE_GETGROUPS */
}
#ifdef TEST
program_name = argv[0];
- for (i=1; i<argc; i++)
+ for (i = 1; i < argc; i++)
{
gid_t gid;