1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License version 2. 4 * 5 * This program is distributed in the hope that it will be useful, 6 * but WITHOUT ANY WARRANTY; without even the implied warranty of 7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 8 * GNU General Public License for more details. 9 * 10 * Test that the shared memory object is created if the shared memory object 11 * does not exists and the O_CREAT flags is set. 12 * 13 * Steps: 14 * 1. Ensure that the shared memory object does not exists using shm_unlink. 15 * 2. Call shm_open() with O_CREAT flags set. 16 * 3. Check that the shared memory object exists now using fstat. 17 */ 18 19 #include <sys/mman.h> 20 #include <sys/stat.h> 21 #include <fcntl.h> 22 #include <stdio.h> 23 #include <unistd.h> 24 #include <errno.h> 25 #include "posixtest.h" 26 27 #define SHM_NAME "posixtest_15-1" 28 29 int main(void) 30 { 31 int fd, result; 32 struct stat stat_buf; 33 34 result = shm_unlink(SHM_NAME); 35 if (result != 0 && errno != ENOENT) { 36 /* The shared memory object exist and shm_unlink can not 37 remove it. */ 38 perror("An error occurs when calling shm_unlink()"); 39 return PTS_UNRESOLVED; 40 } 41 42 fd = shm_open(SHM_NAME, O_RDONLY | O_CREAT, S_IRUSR | S_IWUSR); 43 if (fd == -1) { 44 perror("An error occurs when calling shm_open()"); 45 return PTS_UNRESOLVED; 46 } 47 48 result = fstat(fd, &stat_buf); 49 50 if (result == 0) { 51 printf("Test PASSED\n"); 52 shm_unlink(SHM_NAME); 53 return PTS_PASS; 54 } else if (result == -1 && errno == EBADF) { 55 printf("The shared memory object was no created.\n"); 56 shm_unlink(SHM_NAME); 57 return PTS_FAIL; 58 } 59 60 perror("fstat"); 61 shm_unlink(SHM_NAME); 62 return PTS_FAIL; 63 } 64
