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 shm_open() function sets errno = ENAMETOOLONG if the length 11 * of the name argument exceeds {PATH_MAX} (including the terminating null). 12 * 13 * The used name follow the scheme: 14 * aaaaaa/aaaaaa/aaaaaa/aaa ... 15 */ 16 17 #include <stdio.h> 18 #include <sys/mman.h> 19 #include <sys/stat.h> 20 #include <fcntl.h> 21 #include <errno.h> 22 #include <limits.h> 23 #include <stdlib.h> 24 #include <unistd.h> 25 #include "posixtest.h" 26 27 /* Ensure that each component length is short enough */ 28 #define COMPONENT_SIZE _POSIX_NAME_MAX 29 30 int main(void) 31 { 32 int fd, i, path_max; 33 char *shm_name; 34 35 path_max = pathconf("/", _PC_PATH_MAX); 36 if (path_max == -1) { 37 perror("An error occurs when calling pathconf()"); 38 return PTS_UNRESOLVED; 39 } 40 shm_name = malloc(path_max + 1); 41 42 for (i = 0; i < path_max; i++) 43 shm_name[i] = (i + 1) % COMPONENT_SIZE ? 'a' : '/'; 44 shm_name[path_max] = 0; 45 46 fd = shm_open(shm_name, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); 47 48 if (fd == -1 && errno == ENAMETOOLONG) { 49 printf("Test PASSED\n"); 50 return PTS_PASS; 51 } else if (fd != -1) { 52 printf("FAILED: shm_open() succeeded.\n"); 53 shm_unlink(shm_name); 54 return PTS_FAIL; 55 } 56 57 if (sysconf(_SC_VERSION) >= 200800L) { 58 printf("UNTESTED: shm_open() did not fail with ENAMETOLONG\n"); 59 return PTS_UNTESTED; 60 } 61 62 perror("FAILED: shm_open"); 63 return PTS_FAIL; 64 } 65
