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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* `group_member' -- test if process is in a given group. Hurd version.
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Copyright (C) 1993-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/id.h>
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int
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__group_member (gid_t gid)
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{
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int member = 0;
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error_t err;
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void *crit;
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retry:
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crit = _hurd_critical_section_lock ();
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__mutex_lock (&_hurd_id.lock);
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err = _hurd_check_ids ();
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if (! err)
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{
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size_t i;
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for (i = 0; i < _hurd_id.gen.ngids; ++i)
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if (_hurd_id.gen.gids[i] == gid)
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{
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member = 1;
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break;
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}
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}
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__mutex_unlock (&_hurd_id.lock);
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_hurd_critical_section_unlock (crit);
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if (err == EINTR)
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/* Got a signal while inside an RPC of the critical section, retry again */
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goto retry;
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if (err)
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__hurd_fail (err);
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return member;
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}
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weak_alias (__group_member, group_member)
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