| /* |
| * 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 when name begins with the slash character, then processes calling |
| * shm_open() with the same value of name refer to the same shared memory |
| * object, as long as that name has not been removed. |
| * |
| * Steps: |
| * 1. Create a child process. |
| * (The child process) |
| * 2. Open a shared memory file O_RDWR with a name beginning with slash. |
| * 3. Write a string in the file. |
| * (The father) |
| * 2. Open a shared memory file O_RDONLY with the same name. |
| * 3. Read into the file. |
| * 4. Check that it obtain the right string. |
| */ |
| |
| #include <stdio.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <signal.h> |
| #include "posixtest.h" |
| |
| #define BUF_SIZE 8 |
| #define SHM_NAME "/posixtest_5-1" |
| |
| char str[BUF_SIZE] = "qwerty"; |
| |
| int child_process() |
| { |
| int fd; |
| char *buf; |
| |
| fd = shm_open(SHM_NAME, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); |
| if (fd == -1) { |
| perror("An error occurs when calling shm_open()"); |
| kill(getppid(), SIGUSR1); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (ftruncate(fd, BUF_SIZE) != 0) { |
| perror("An error occurs when calling ftruncate()"); |
| kill(getppid(), SIGUSR1); |
| return PTS_UNRESOLVED; |
| } |
| |
| buf = mmap(NULL, BUF_SIZE, PROT_WRITE, MAP_SHARED, fd, 0); |
| if (buf == MAP_FAILED) { |
| perror("An error occurs when calling mmap()"); |
| kill(getppid(), SIGUSR1); |
| return PTS_UNRESOLVED; |
| } |
| |
| strcpy(buf, str); |
| |
| return PTS_PASS; |
| } |
| |
| int main(void) |
| { |
| int fd, child_pid; |
| char *buf; |
| |
| child_pid = fork(); |
| if (child_pid == -1) { |
| perror("An error occurs when calling fork()"); |
| return PTS_UNRESOLVED; |
| } else if (child_pid == 0) { |
| return child_process(); |
| } |
| |
| wait(NULL); |
| |
| fd = shm_open(SHM_NAME, O_RDONLY, S_IRUSR | S_IWUSR); |
| if (fd == -1) { |
| perror("An error occurs when calling shm_open()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| buf = mmap(NULL, BUF_SIZE, PROT_READ, MAP_SHARED, fd, 0); |
| if (buf == MAP_FAILED) { |
| perror("An error occurs when calling mmap()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| shm_unlink(SHM_NAME); |
| |
| if (strcmp(buf, str) == 0) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |
| |
| printf("Test FAILED\n"); |
| return PTS_FAIL; |
| } |