1 /* Test program for POSIX shm_* functions.
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
34 /* We want to see output immediately. */
35 #define STDOUT_UNBUFFERED
38 worker (int write_now)
43 int fd = shm_open ("/glibc-shm-test", O_RDWR, 0600);
46 error (EXIT_FAILURE, 0, "failed to open shared memory object: shm_open");
53 if (fstat64 (fd, &st) == -1)
54 error (EXIT_FAILURE, 0, "stat failed");
55 if (st.st_size != 4000)
56 error (EXIT_FAILURE, 0, "size incorrect");
58 mem = mmap (NULL, 4000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
59 if (mem == MAP_FAILED)
60 error (EXIT_FAILURE, 0, "mmap failed");
63 ts.tv_nsec = 500000000;
66 for (i = 0; i <= 4; ++i)
69 /* Wait until the first bytes of the memory region are 0, 1, 2, 3, 4. */
72 for (i = 0; i <= 4; ++i)
77 /* OK, that's done. */
80 nanosleep (&ts, NULL);
84 for (i = 0; i <= 4; ++i)
87 /* Wait until the first bytes of the memory region are 4, 5, 6, 7, 8. */
90 for (i = 0; i <= 4; ++i)
95 /* OK, that's done. */
98 nanosleep (&ts, NULL);
101 if (munmap (mem, 4000) == -1)
102 error (EXIT_FAILURE, errno, "munmap");
120 fd = shm_open ("/../escaped", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
123 perror ("read file outside of SHMDIR directory");
128 /* Create the shared memory object. */
129 fd = shm_open ("/glibc-shm-test", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
132 /* If shm_open is unimplemented we skip the test. */
135 perror ("shm_open unimplemented. Test skipped.");
139 error (EXIT_FAILURE, 0, "failed to create shared memory object: shm_open");
142 /* Size the object. We make it 4000 bytes long. */
143 if (ftruncate (fd, 4000) == -1)
145 /* This failed. Must be a bug in the implementation of the
146 shared memory itself. */
147 perror ("failed to size of shared memory object: ftruncate");
149 shm_unlink ("/glibc-shm-test");
153 if (fstat64 (fd, &st) == -1)
155 shm_unlink ("/glibc-shm-test");
156 error (EXIT_FAILURE, 0, "initial stat failed");
158 if (st.st_size != 4000)
160 shm_unlink ("/glibc-shm-test");
161 error (EXIT_FAILURE, 0, "initial size not correct");
164 /* Spawn to processes which will do the work. */
170 /* Couldn't create a second process. */
173 shm_unlink ("/glibc-shm-test");
182 /* Couldn't create a second process. */
185 kill (pid1, SIGTERM);
186 waitpid (pid1, &ignore, 0);
188 shm_unlink ("/glibc-shm-test");
192 /* Wait until the two processes are finished. */
193 waitpid (pid1, &status1, 0);
194 waitpid (pid2, &status2, 0);
196 /* Now we can unlink the shared object. */
197 shm_unlink ("/glibc-shm-test");
199 return (!WIFEXITED (status1) || WEXITSTATUS (status1) != 0
200 || !WIFEXITED (status2) || WEXITSTATUS (status2) != 0);
202 #define TEST_FUNCTION do_test ()
204 #define CLEANUP_HANDLER shm_unlink ("/glibc-shm-test");
207 #include "../test-skeleton.c"