1 /*
2 * Copyright (c) 2002, Intel Corporation. All rights reserved.
3 * Copyright (c) 2012, Cyril Hrubis <chrubis@suse.cz>
4 *
5 * This file is licensed under the GPL license. For the full content
6 * of this license, see the COPYING file at the top level of this
7 * source tree.
8 *
9 * The st_ctime and st_mtime fields of a file that is mapped with
10 * MAP_SHARED and PROT_WRITE shall be marked for update at some point
11 * in the interval between a write reference to the
12 * mapped region and the next call to msync() with MS_ASYNC or MS_SYNC
13 * for that portion of the file by any process.
14 * If there is no such call and if the underlying file is modified
15 * as a result of a write reference, then these fields shall be marked
16 * for update at some time after the write reference.
17 *
18 */
19
20 #define _XOPEN_SOURCE 600
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <unistd.h>
25 #include <sys/mman.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/wait.h>
29 #include <fcntl.h>
30 #include <string.h>
31 #include <errno.h>
32 #include <time.h>
33 #include "posixtest.h"
34
main(void)35 int main(void)
36 {
37 char tmpfname[256];
38 ssize_t size = 1024;
39 char data[size];
40 void *pa;
41 int fd;
42 struct stat stat_buff;
43
44 time_t mtime1, mtime2, ctime1, ctime2;
45
46 char *ch;
47
48 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_14_1_%d", getpid());
49 unlink(tmpfname);
50 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
51 if (fd == -1) {
52 printf("Error at open(): %s\n", strerror(errno));
53 return PTS_UNRESOLVED;
54 }
55
56 memset(data, 'a', size);
57 printf("Time before write(): %ld\n", time(NULL));
58 if (write(fd, data, size) != size) {
59 printf("Error at write(): %s\n", strerror(errno));
60 unlink(tmpfname);
61 return PTS_UNRESOLVED;
62 }
63 sleep(1);
64 printf("Time before mmap(): %ld\n", time(NULL));
65 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
66 if (pa == MAP_FAILED) {
67 printf("Error at mmap: %s\n", strerror(errno));
68 unlink(tmpfname);
69 return PTS_FAIL;
70 }
71 sleep(1);
72 printf("Time before write reference: %ld\n", time(NULL));
73 /* Before write reference */
74 if (stat(tmpfname, &stat_buff) == -1) {
75 printf("Error at 1st stat(): %s\n", strerror(errno));
76 unlink(tmpfname);
77 return PTS_UNRESOLVED;
78 }
79
80 ctime1 = stat_buff.st_ctime;
81 mtime1 = stat_buff.st_mtime;
82
83 ch = pa;
84 *ch = 'b';
85
86 /* Wait a while in case the precision of the sa_time
87 * is not acurate enough to reflect the update
88 */
89 sleep(1);
90 printf("Time before msync(): %ld\n", time(NULL));
91 msync(pa, size, MS_SYNC);
92
93 /* FIXME: Update the in-core meta data to the disk */
94 fsync(fd);
95
96 if (stat(tmpfname, &stat_buff) == -1) {
97 printf("Error at stat(): %s\n", strerror(errno));
98 unlink(tmpfname);
99 return PTS_UNRESOLVED;
100 }
101
102 ctime2 = stat_buff.st_ctime;
103 mtime2 = stat_buff.st_mtime;
104
105 printf("ctime1: %ld, ctime2: %ld\nmtime1: %ld, mtime2: %ld\n",
106 ctime1, ctime2, mtime1, mtime2);
107 if (ctime2 == ctime1 || mtime2 == mtime1) {
108 printf("Test FAILED: "
109 "st_ctime and st_mtime were not updated properly\n");
110 unlink(tmpfname);
111 return PTS_FAIL;
112 }
113
114 munmap(pa, size);
115 close(fd);
116 unlink(tmpfname);
117 printf("Test PASSED\n");
118 return PTS_PASS;
119 }
120