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 mlock() set errno = EINVAL when addr is not a multiple of 11 * {PAGESIZE} if the implementation requires that addr be a multiple of 12 * {PAGESIZE}. 13 */ 14 15 #include <sys/mman.h> 16 #include <stdio.h> 17 #include <unistd.h> 18 #include <stdlib.h> 19 #include <errno.h> 20 #include "posixtest.h" 21 main(void)22int main(void) 23 { 24 int result; 25 long page_size; 26 void *ptr, *notpage_ptr; 27 28 page_size = sysconf(_SC_PAGESIZE); 29 if (errno) { 30 perror("An error occurs when calling sysconf()"); 31 return PTS_UNRESOLVED; 32 } 33 34 ptr = malloc(page_size); 35 if (ptr == NULL) { 36 printf("Can not allocate memory.\n"); 37 return PTS_UNRESOLVED; 38 } 39 40 notpage_ptr = ((long)ptr % page_size) ? ptr : ptr + 1; 41 42 result = mlock(notpage_ptr, page_size - 1); 43 44 if (result == 0) { 45 printf 46 ("mlock() does not require that addr be a multiple of {PAGESIZE}.\nTest PASSED\n"); 47 return PTS_PASS; 48 } else if (result == -1 && errno == EINVAL) { 49 printf 50 ("mlock() requires that addr be a multiple of {PAGESIZE}.\nTest PASSED\n"); 51 return PTS_PASS; 52 } else if (errno == EPERM) { 53 printf 54 ("You don't have permission to lock your address space.\nTry to rerun this test as root.\n"); 55 return PTS_UNRESOLVED; 56 } else if (result != -1) { 57 printf("mlock() returns a value of %i instead of 0 or 1.\n", 58 result); 59 perror("mlock"); 60 return PTS_FAIL; 61 } 62 perror("Unexpected error"); 63 return PTS_UNRESOLVED; 64 } 65