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
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24 #include <sys/mman.h>
25 #include <sys/types.h>
26 #include <sys/stat.h>
27 #include <sys/wait.h>
28 #include <fcntl.h>
29 #include <string.h>
30 #include <errno.h>
31 #include <time.h>
32
33 #include "posixtest.h"
34 #include "tempfile.h"
35
main(void)36 int main(void)
37 {
38 char tmpfname[PATH_MAX];
39 ssize_t size = 1024;
40 char data[size];
41 void *pa;
42 int fd;
43 struct stat stat_buff;
44
45 time_t mtime1, mtime2, ctime1, ctime2;
46
47 char *ch;
48
49 PTS_GET_TMP_FILENAME(tmpfname, "pts_mmap_14_1");
50 unlink(tmpfname);
51 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
52 if (fd == -1) {
53 printf("Error at open(): %s\n", strerror(errno));
54 return PTS_UNRESOLVED;
55 }
56
57 memset(data, 'a', size);
58 printf("Time before write(): %ld\n", time(NULL));
59 if (write(fd, data, size) != size) {
60 printf("Error at write(): %s\n", strerror(errno));
61 unlink(tmpfname);
62 return PTS_UNRESOLVED;
63 }
64 sleep(1);
65 printf("Time before mmap(): %ld\n", time(NULL));
66 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
67 if (pa == MAP_FAILED) {
68 printf("Error at mmap: %s\n", strerror(errno));
69 unlink(tmpfname);
70 return PTS_FAIL;
71 }
72 sleep(1);
73 printf("Time before write reference: %ld\n", time(NULL));
74 /* Before write reference */
75 if (stat(tmpfname, &stat_buff) == -1) {
76 printf("Error at 1st stat(): %s\n", strerror(errno));
77 unlink(tmpfname);
78 return PTS_UNRESOLVED;
79 }
80
81 ctime1 = stat_buff.st_ctime;
82 mtime1 = stat_buff.st_mtime;
83
84 ch = pa;
85 *ch = 'b';
86
87 /* Wait a while in case the precision of the sa_time
88 * is not acurate enough to reflect the update
89 */
90 sleep(1);
91 printf("Time before msync(): %ld\n", time(NULL));
92 msync(pa, size, MS_SYNC);
93
94 /* FIXME: Update the in-core meta data to the disk */
95 fsync(fd);
96
97 if (stat(tmpfname, &stat_buff) == -1) {
98 printf("Error at stat(): %s\n", strerror(errno));
99 unlink(tmpfname);
100 return PTS_UNRESOLVED;
101 }
102
103 ctime2 = stat_buff.st_ctime;
104 mtime2 = stat_buff.st_mtime;
105
106 printf("ctime1: %ld, ctime2: %ld\nmtime1: %ld, mtime2: %ld\n",
107 ctime1, ctime2, mtime1, mtime2);
108 if (ctime2 == ctime1 || mtime2 == mtime1) {
109 printf("Test FAILED: "
110 "st_ctime and st_mtime were not updated properly\n");
111 unlink(tmpfname);
112 return PTS_FAIL;
113 }
114
115 munmap(pa, size);
116 close(fd);
117 unlink(tmpfname);
118 printf("Test PASSED\n");
119 return PTS_PASS;
120 }
121