58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/* Copyright (C) 1993-2022 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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/* Get the real user ID of the calling process. */
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uid_t
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__getuid (void)
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{
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error_t err;
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uid_t uid;
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retry:
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_id.lock);
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if (err = _hurd_check_ids ())
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{
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errno = err;
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uid = -1;
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}
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else if (_hurd_id.aux.nuids >= 1)
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uid = _hurd_id.aux.uids[0];
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else
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{
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/* We do not even have a real uid. */
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errno = EGRATUITOUS;
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uid = -1;
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}
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__mutex_unlock (&_hurd_id.lock);
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HURD_CRITICAL_END;
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if (uid == -1 && errno == 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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return uid;
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}
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weak_alias (__getuid, getuid)
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