1/* Test posix_spawn setsid attribute.
2 Copyright (C) 2017-2022 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 <errno.h>
20#include <fcntl.h>
21#include <spawn.h>
22#include <stdbool.h>
23#include <stdio.h>
24#include <sys/resource.h>
25#include <unistd.h>
26
27#include <support/check.h>
28
29static void
30do_test_setsid (bool test_setsid)
31{
32 pid_t sid, child_sid;
33 int res;
34
35 /* Current session ID. */
36 sid = getsid(0);
37 if (sid == (pid_t) -1)
38 FAIL_EXIT1 ("getsid (0): %m");
39
40 posix_spawnattr_t attrp;
41 /* posix_spawnattr_init should not fail (it basically memset the
42 attribute). */
43 posix_spawnattr_init (attr: &attrp);
44 if (test_setsid)
45 {
46 res = posix_spawnattr_setflags (attr: &attrp, POSIX_SPAWN_SETSID);
47 if (res != 0)
48 {
49 errno = res;
50 FAIL_EXIT1 ("posix_spawnattr_setflags: %m");
51 }
52 }
53
54 /* Program to run. */
55 char *args[2] = { (char *) "true", NULL };
56 pid_t child;
57
58 res = posix_spawnp (pid: &child, file: "true", NULL, attrp: &attrp, argv: args, envp: environ);
59 /* posix_spawnattr_destroy is noop. */
60 posix_spawnattr_destroy (attr: &attrp);
61
62 if (res != 0)
63 {
64 errno = res;
65 FAIL_EXIT1 ("posix_spawnp: %m");
66 }
67
68 /* Child should have a different session ID than parent. */
69 child_sid = getsid (child);
70
71 if (child_sid == (pid_t) -1)
72 FAIL_EXIT1 ("getsid (%i): %m", child);
73
74 if (test_setsid)
75 {
76 if (child_sid == sid)
77 FAIL_EXIT1 ("child session ID matched parent one");
78 }
79 else
80 {
81 if (child_sid != sid)
82 FAIL_EXIT1 ("child session ID did not match parent one");
83 }
84}
85
86static int
87do_test (void)
88{
89 do_test_setsid (false);
90 do_test_setsid (true);
91
92 return 0;
93}
94
95#include <support/test-driver.c>
96

source code of glibc/posix/tst-posix_spawn-setsid.c