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/* `group_member' -- test if process is in a given group. Hurd version.
Copyright (C) 1993-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/id.h>
int
__group_member (gid_t gid)
{
int member = 0;
error_t err;
void *crit;
retry:
crit = _hurd_critical_section_lock ();
__mutex_lock (&_hurd_id.lock);
err = _hurd_check_ids ();
if (! err)
{
size_t i;
for (i = 0; i < _hurd_id.gen.ngids; ++i)
if (_hurd_id.gen.gids[i] == gid)
{
member = 1;
break;
}
}
__mutex_unlock (&_hurd_id.lock);
_hurd_critical_section_unlock (crit);
if (err == EINTR)
/* Got a signal while inside an RPC of the critical section, retry again */
goto retry;
if (err)
__hurd_fail (err);
return member;
}
weak_alias (__group_member, group_member)
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