| /* |
| * 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 shm_open() function sets errno = EACCES if the shared memory |
| * object exists and the permissions specified by oflag are denied |
| * |
| * Create a shared memory object with no read or write permission and try to |
| * open it. |
| */ |
| |
| #include <stdio.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <pwd.h> |
| #include <string.h> |
| #include "posixtest.h" |
| |
| #define SHM_NAME "posixtest_32-1" |
| |
| /** Set the euid of this process to a non-root uid */ |
| int set_nonroot() |
| { |
| struct passwd *pw; |
| setpwent(); |
| /* search for the first user which is non root */ |
| while ((pw = getpwent()) != NULL) |
| if (strcmp(pw->pw_name, "root")) |
| break; |
| endpwent(); |
| if (pw == NULL) { |
| printf("There is no other user than current and root.\n"); |
| return 1; |
| } |
| |
| if (seteuid(pw->pw_uid) != 0) { |
| if (errno == EPERM) { |
| printf |
| ("You don't have permission to change your UID.\n"); |
| return 1; |
| } |
| perror("An error occurs when calling seteuid()"); |
| return 1; |
| } |
| |
| printf("Testing with user '%s' (uid: %d)\n", |
| pw->pw_name, (int)geteuid()); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| int fd; |
| |
| /* This test should be run under standard user permissions */ |
| if (getuid() == 0) { |
| if (set_nonroot() != 0) { |
| printf("Cannot run this test as non-root user\n"); |
| return PTS_UNTESTED; |
| } |
| } |
| |
| fd = shm_open(SHM_NAME, O_RDWR | O_CREAT, 0); |
| if (fd == -1) { |
| perror("An error occurs when calling shm_open()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| fd = shm_open(SHM_NAME, O_RDWR, 0); |
| |
| if (fd == -1 && errno == EACCES) { |
| printf("Test PASSED\n"); |
| shm_unlink(SHM_NAME); |
| return PTS_PASS; |
| } else if (fd != -1) { |
| printf("shm_open success.\n"); |
| shm_unlink(SHM_NAME); |
| return PTS_FAIL; |
| } |
| |
| perror("shm_open"); |
| return PTS_FAIL; |
| } |