| /* |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * Test that the permission bits of the shared memory object are set to the |
| * value of the mode argument except those set in the file mode creation mask |
| * of the process when the shared memory object does not exists and the O_CREAT |
| * flags is set. |
| * |
| * Steps: |
| * 1. Set umask to UMASK_FLAGS. |
| * 2. Ensure that the shared memory object does not exist. |
| * 3. Call shm_open with mode MOD_FLAGS. |
| * 4. Get the stat of the opened file. |
| * 5. Check that the permissions flags are right. |
| */ |
| |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include "posixtest.h" |
| |
| #define SHM_NAME "posixtest_18-1" |
| |
| /* execution bits is undefined */ |
| #define MOD_FLAGS (S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH) /* -w?rw?r-? */ |
| #define UMASK_FLAGS (S_IRGRP | S_IWOTH) /* --?r-?-w? */ |
| #define ALL_MOD_FLAGS (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | \ |
| S_IROTH | S_IWOTH) /* rw?rw?rw? */ |
| |
| int main() { |
| int fd, result; |
| struct stat stat_buf; |
| |
| umask(UMASK_FLAGS); |
| |
| result = shm_unlink(SHM_NAME); |
| if (result != 0 && errno != ENOENT) { |
| /* The shared memory object exist and shm_unlink can not |
| remove it. */ |
| perror("An error occurs when calling shm_unlink()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| fd = shm_open(SHM_NAME, O_RDONLY|O_CREAT, MOD_FLAGS); |
| if (fd == -1) { |
| perror("An error occurs when calling shm_open()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| result = fstat(fd, &stat_buf); |
| if (result != 0) { |
| perror("An error occurs when calling fstat()"); |
| shm_unlink(SHM_NAME); |
| return PTS_UNRESOLVED; |
| } |
| |
| shm_unlink(SHM_NAME); |
| |
| /* Check the permissions flags. |
| * Permissions flags are right when the permissions bits of |
| * stat_buf.st_mode are set if and only if the same bits of MOD_FLAGS |
| * are set and thoses of UMASK_FLAGS are not, i.e.: |
| * ALL_MOD_FLAGS & (stat_buf.st_mode ^ (MOD_FLAGS & ~UMASK_FLAGS)) == 0 |
| */ |
| if (!(ALL_MOD_FLAGS & |
| (stat_buf.st_mode ^ (MOD_FLAGS & ~UMASK_FLAGS)))) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |
| |
| printf("shm_open() does not set the rights permissions.\n"); |
| return PTS_FAIL; |
| |
| } |