10dc076565f772bb1953209fb69ea150b494aaa40robbiew/* 20dc076565f772bb1953209fb69ea150b494aaa40robbiew * This program is free software; you can redistribute it and/or modify 30dc076565f772bb1953209fb69ea150b494aaa40robbiew * it under the terms of the GNU General Public License version 2. 40dc076565f772bb1953209fb69ea150b494aaa40robbiew * 50dc076565f772bb1953209fb69ea150b494aaa40robbiew * This program is distributed in the hope that it will be useful, 60dc076565f772bb1953209fb69ea150b494aaa40robbiew * but WITHOUT ANY WARRANTY; without even the implied warranty of 70dc076565f772bb1953209fb69ea150b494aaa40robbiew * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 80dc076565f772bb1953209fb69ea150b494aaa40robbiew * GNU General Public License for more details. 90dc076565f772bb1953209fb69ea150b494aaa40robbiew * 100dc076565f772bb1953209fb69ea150b494aaa40robbiew * Test that shm_open open the shared memory object for reading when calling 110dc076565f772bb1953209fb69ea150b494aaa40robbiew * shm_open even if the mode don't set read permission. 120dc076565f772bb1953209fb69ea150b494aaa40robbiew * 130dc076565f772bb1953209fb69ea150b494aaa40robbiew * The test use mmap to check the object is open for reading. 140dc076565f772bb1953209fb69ea150b494aaa40robbiew */ 150dc076565f772bb1953209fb69ea150b494aaa40robbiew 160dc076565f772bb1953209fb69ea150b494aaa40robbiew/* ftruncate was formerly an XOPEN extension. We define _XOPEN_SOURCE here to 172c28215423293e443469a07ae7011135d058b671Garrett Cooper avoid warning if the implementation does not program ftruncate as a base 180dc076565f772bb1953209fb69ea150b494aaa40robbiew interface */ 190dc076565f772bb1953209fb69ea150b494aaa40robbiew#define _XOPEN_SOURCE 600 200dc076565f772bb1953209fb69ea150b494aaa40robbiew 210dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <stdio.h> 220dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <sys/mman.h> 230dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <sys/stat.h> 240dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <unistd.h> 250dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <fcntl.h> 260dc076565f772bb1953209fb69ea150b494aaa40robbiew#include <errno.h> 270dc076565f772bb1953209fb69ea150b494aaa40robbiew#include "posixtest.h" 280dc076565f772bb1953209fb69ea150b494aaa40robbiew 290dc076565f772bb1953209fb69ea150b494aaa40robbiew#define BUF_SIZE 8 300dc076565f772bb1953209fb69ea150b494aaa40robbiew#define SHM_NAME "posixtest_20-3" 310dc076565f772bb1953209fb69ea150b494aaa40robbiew 324ca2bbdcd3003f3c8df4e6129e9c7b2bd1514f87Cyril Hrubisint main(void) 33354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao{ 340dc076565f772bb1953209fb69ea150b494aaa40robbiew int fd, result; 350dc076565f772bb1953209fb69ea150b494aaa40robbiew void *ptr; 362c28215423293e443469a07ae7011135d058b671Garrett Cooper 370dc076565f772bb1953209fb69ea150b494aaa40robbiew result = shm_unlink(SHM_NAME); 382c28215423293e443469a07ae7011135d058b671Garrett Cooper if (result != 0 && errno != ENOENT) { 392c28215423293e443469a07ae7011135d058b671Garrett Cooper /* The shared memory object exist and shm_unlink can not 400dc076565f772bb1953209fb69ea150b494aaa40robbiew remove it. */ 410dc076565f772bb1953209fb69ea150b494aaa40robbiew perror("An error occurs when calling shm_unlink()"); 420dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 430dc076565f772bb1953209fb69ea150b494aaa40robbiew } 440dc076565f772bb1953209fb69ea150b494aaa40robbiew 45354ebb48db8e66a853a58379a4808d5dcd1ceac3Wanlong Gao fd = shm_open(SHM_NAME, O_RDWR | O_CREAT, 0); 46df3eb16e38c6a163b0a7367c885679eed6140964Garrett Cooper if (fd == -1) { 470dc076565f772bb1953209fb69ea150b494aaa40robbiew perror("An error occurs when calling shm_open()"); 480dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_UNRESOLVED; 490dc076565f772bb1953209fb69ea150b494aaa40robbiew } 500dc076565f772bb1953209fb69ea150b494aaa40robbiew 51df3eb16e38c6a163b0a7367c885679eed6140964Garrett Cooper if (ftruncate(fd, BUF_SIZE) != 0) { 520dc076565f772bb1953209fb69ea150b494aaa40robbiew perror("An error occurs when calling ftruncate()"); 530dc076565f772bb1953209fb69ea150b494aaa40robbiew shm_unlink(SHM_NAME); 542c28215423293e443469a07ae7011135d058b671Garrett Cooper return PTS_UNRESOLVED; 550dc076565f772bb1953209fb69ea150b494aaa40robbiew } 560dc076565f772bb1953209fb69ea150b494aaa40robbiew 570dc076565f772bb1953209fb69ea150b494aaa40robbiew ptr = mmap(NULL, BUF_SIZE, PROT_NONE, MAP_SHARED, fd, 0); 58df3eb16e38c6a163b0a7367c885679eed6140964Garrett Cooper if (ptr != MAP_FAILED) { 590dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("Test PASSED\n"); 600dc076565f772bb1953209fb69ea150b494aaa40robbiew shm_unlink(SHM_NAME); 610dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_PASS; 62df3eb16e38c6a163b0a7367c885679eed6140964Garrett Cooper } else if (errno == EACCES) { 630dc076565f772bb1953209fb69ea150b494aaa40robbiew printf("The shared memory object is not opened for reading.\n"); 640dc076565f772bb1953209fb69ea150b494aaa40robbiew shm_unlink(SHM_NAME); 650dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_FAIL; 660dc076565f772bb1953209fb69ea150b494aaa40robbiew } 670dc076565f772bb1953209fb69ea150b494aaa40robbiew 680dc076565f772bb1953209fb69ea150b494aaa40robbiew perror("mmap"); 690dc076565f772bb1953209fb69ea150b494aaa40robbiew shm_unlink(SHM_NAME); 700dc076565f772bb1953209fb69ea150b494aaa40robbiew return PTS_FAIL; 71ec6edca7aa42b6affd989ef91b5897f96795e40fChris Dearman} 72