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43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Copyright (C) 1991-2023 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/port.h>
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/* Get the process group ID of process PID. */
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int
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__getpgid (pid_t pid)
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{
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error_t err;
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pid_t pgrp;
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if (pid == 0)
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{
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/* Assume atomic word fetch and store, so don't lock _hurd_pid_lock. */
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pgrp = _hurd_pgrp;
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err = 0;
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}
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else
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err = __USEPORT (PROC, __proc_getpgrp (port, pid, &pgrp));
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return err ? __hurd_fail (err) : pgrp;
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}
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libc_hidden_def (__getpgid)
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weak_alias (__getpgid, getpgid)
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