| /* |
| * 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 mlock() function sets errno = ENOMEM if some or all of the |
| * address range specified by the addr and len arguments does not correspond to |
| * valid mapped pages in the address space of the process. |
| * |
| * Assume that the value LONG_MAX is an invalid pointer. |
| */ |
| |
| #include <sys/mman.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include "posixtest.h" |
| |
| #define BUFSIZE 8 |
| |
| int main() { |
| int result; |
| long page_size; |
| void *page_ptr; |
| |
| page_size = sysconf(_SC_PAGESIZE); |
| if (errno) { |
| perror("An error occurs when calling sysconf()"); |
| return PTS_UNRESOLVED; |
| } |
| |
| page_ptr = (void*)(LONG_MAX - (LONG_MAX % page_size)); |
| result = mlock(page_ptr, BUFSIZE); |
| |
| if (result == -1 && errno == ENOMEM) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } else if (errno == EPERM) { |
| printf("You don't have permission to lock your address space.\nTry to rerun this test as root.\n"); |
| return PTS_UNRESOLVED; |
| } else { |
| perror("Unexpected error"); |
| return PTS_UNRESOLVED; |
| } |
| |
| } |