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1/* Test for sem_open cancellation handling: BZ #15765.
2 Copyright (C) 2016-2019 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 <http://www.gnu.org/licenses/>. */
18
19#include <pthread.h>
20#include <sys/mman.h>
21#include <semaphore.h>
22#include <stdio.h>
23#include <fcntl.h>
24#include <unistd.h>
25#include <errno.h>
26#include <stdlib.h>
27
28static sem_t sem; /* Use to sync with thread start. */
29static const char pipe_name[] = "/glibc-tst-sem16";
30
31static void
32remove_sem (int status, void *arg)
33{
34 sem_unlink (arg);
35}
36
37static void *
38tf (void *arg)
39{
40 pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0);
41
42 if (sem_wait (&sem) != 0)
43 {
44 printf ("error: sem_wait failed: %m");
45 exit (1);
46 }
47
48 if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0) != 0)
49 {
50 printf ("error: pthread_setcancelstate failed: %m");
51 exit (1);
52 }
53
54 /* Neither sem_unlink or sem_open should act on thread cancellation. */
55 sem_unlink (pipe_name);
56 on_exit (remove_sem, (void *) pipe_name);
57
58 sem_t *s = sem_open (pipe_name, O_CREAT, 0600, 1);
59 if (s == SEM_FAILED)
60 {
61 int exit_code;
62 if (errno == ENOSYS || errno == EACCES)
63 exit_code = 77;
64 else
65 exit_code = 1;
66 exit (exit_code);
67 }
68
69 if (pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0) != 0)
70 {
71 printf ("error: pthread_setcancelstate failed: %m");
72 exit (1);
73 }
74
75 if (sem_close (s) != 0)
76 {
77 printf ("error: sem_close failed: %m");
78 exit (1);
79 }
80
81 return NULL;
82}
83
84static int
85do_test (void)
86{
87 pthread_t td;
88
89 if (sem_init (&sem, 0, 0))
90 {
91 printf ("error: sem_init failed: %m\n");
92 exit (1);
93 }
94
95 if (pthread_create (&td, NULL, tf, NULL) != 0)
96 {
97 printf ("error: pthread_create failed: %m\n");
98 exit (1);
99 }
100
101 if (pthread_cancel (td) != 0)
102 {
103 printf ("error: pthread_cancel failed: %m\n");
104 exit (1);
105 }
106
107 if (sem_post (&sem) != 0)
108 {
109 printf ("error: sem_post failed: %m\n");
110 exit (1);
111 }
112
113 void *r;
114 if (pthread_join (td, &r) != 0)
115 {
116 printf ("error: pthread_join failed: %m\n");
117 exit (1);
118 }
119
120 if (r == PTHREAD_CANCELED)
121 {
122 puts ("error: pthread_join returned PTHREAD_CANCELED");
123 exit (1);
124 }
125
126 return 0;
127}
128
129#define TEST_FUNCTION do_test ()
130#include <test-skeleton.c>
131

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