1/* Copyright (C) 2004-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <pthreadP.h>
19#include <sys/single_threaded.h>
20#include <sysdep.h>
21
22#define __SETXID_1(cmd, arg1) \
23 cmd.id[0] = (long int) arg1
24#define __SETXID_2(cmd, arg1, arg2) \
25 __SETXID_1 (cmd, arg1); cmd.id[1] = (long int) arg2
26#define __SETXID_3(cmd, arg1, arg2, arg3) \
27 __SETXID_2 (cmd, arg1, arg2); cmd.id[2] = (long int) arg3
28
29#define INLINE_SETXID_SYSCALL(name, nr, args...) \
30 ({ \
31 int __result; \
32 if (!__libc_single_threaded) \
33 { \
34 struct xid_command __cmd; \
35 __cmd.syscall_no = __NR_##name; \
36 __SETXID_##nr (__cmd, args); \
37 __result =__nptl_setxid (&__cmd); \
38 } \
39 else \
40 __result = INLINE_SYSCALL (name, nr, args); \
41 __result; \
42 })
43

source code of glibc/sysdeps/nptl/setxid.h