1/* getsid -- Return session ID of a process. Hurd version.
2 Copyright (C) 1995-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <sys/types.h>
20#include <unistd.h>
21#include <errno.h>
22#include <hurd.h>
23
24pid_t
25getsid (pid_t pid)
26{
27 error_t err;
28 pid_t sid;
29
30 if (pid == 0)
31 pid = _hurd_pid;
32
33 err = __USEPORT (PROC, __proc_getsid (port, pid, &sid));
34 if (err)
35 return (pid_t) __hurd_fail (err);
36 return sid;
37}
38libc_hidden_def (getsid)
39

source code of glibc/sysdeps/mach/hurd/getsid.c