1 /*
2 * Copyright (c) 2002, Intel Corporation. All rights reserved.
3 * This file is licensed under the GPL license. For the full content
4 * of this license, see the COPYING file at the top level of this
5 * source tree.
6 *
7 * If there are no mappings in the specified address range, then munmap() has
8 * no effect. To get a valid address range which is safe to call munmap() on
9 * we first map some arbitrary memory allowing the OS to select the address
10 * then unmap it. We then call munmap() on the same address again to perform
11 * the test.
12 *
13 */
14
15 #include <pthread.h>
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <unistd.h>
19 #include <sys/mman.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <sys/wait.h>
23 #include <fcntl.h>
24 #include <string.h>
25 #include <errno.h>
26 #include "posixtest.h"
27
28 #define TNAME "munmap/2-1.c"
29
main(void)30 int main(void)
31 {
32 int rc, fd, map_size;
33 void *map_addr;
34
35 map_size = sysconf(_SC_PAGESIZE);
36 fd = open("/dev/zero", O_RDWR);
37 if (fd == -1) {
38 printf("Failed to open /dev/zero: %s (%d)\n",
39 strerror(errno),
40 errno);
41 return PTS_UNRESOLVED;
42 }
43
44 map_addr = mmap(NULL, map_size, PROT_NONE, MAP_PRIVATE, fd, 0);
45 if (map_addr == MAP_FAILED) {
46 printf("Failed to map memory: %s (%d)\n",
47 strerror(errno),
48 errno);
49 close(fd);
50 return PTS_UNRESOLVED;
51 }
52
53 close(fd);
54
55 rc = munmap(map_addr, map_size);
56 if (rc != 0) {
57 printf("Failed to unmap memory: %s (%d)\n",
58 strerror(errno),
59 errno);
60 close(fd);
61 return PTS_UNRESOLVED;
62 }
63
64 rc = munmap(map_addr, map_size);
65 if (rc != 0) {
66 printf("Test FAILED " TNAME " Error at munmap(): %s (%d)\n",
67 strerror(errno),
68 errno);
69 return PTS_FAIL;
70 }
71
72 printf("Test PASSED\n");
73 return PTS_PASS;
74 }
75