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 #include "posixtest.h"
33
main(void)34 int main(void)
35 {
36 char tmpfname[256];
37 ssize_t size = 1024;
38 char data[size];
39 void *pa;
40 int fd;
41 struct stat stat_buff;
42
43 time_t mtime1, mtime2, ctime1, ctime2;
44
45 char *ch;
46
47 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_14_1_%d", getpid());
48 unlink(tmpfname);
49 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
50 if (fd == -1) {
51 printf("Error at open(): %s\n", strerror(errno));
52 return PTS_UNRESOLVED;
53 }
54
55 memset(data, 'a', size);
56 printf("Time before write(): %ld\n", time(NULL));
57 if (write(fd, data, size) != size) {
58 printf("Error at write(): %s\n", strerror(errno));
59 unlink(tmpfname);
60 return PTS_UNRESOLVED;
61 }
62 sleep(1);
63 printf("Time before mmap(): %ld\n", time(NULL));
64 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
65 if (pa == MAP_FAILED) {
66 printf("Error at mmap: %s\n", strerror(errno));
67 unlink(tmpfname);
68 return PTS_FAIL;
69 }
70 sleep(1);
71 printf("Time before write reference: %ld\n", time(NULL));
72 /* Before write reference */
73 if (stat(tmpfname, &stat_buff) == -1) {
74 printf("Error at 1st stat(): %s\n", strerror(errno));
75 unlink(tmpfname);
76 return PTS_UNRESOLVED;
77 }
78
79 ctime1 = stat_buff.st_ctime;
80 mtime1 = stat_buff.st_mtime;
81
82 ch = pa;
83 *ch = 'b';
84
85 /* Wait a while in case the precision of the sa_time
86 * is not acurate enough to reflect the update
87 */
88 sleep(1);
89 printf("Time before msync(): %ld\n", time(NULL));
90 msync(pa, size, MS_SYNC);
91
92 /* FIXME: Update the in-core meta data to the disk */
93 fsync(fd);
94
95 if (stat(tmpfname, &stat_buff) == -1) {
96 printf("Error at stat(): %s\n", strerror(errno));
97 unlink(tmpfname);
98 return PTS_UNRESOLVED;
99 }
100
101 ctime2 = stat_buff.st_ctime;
102 mtime2 = stat_buff.st_mtime;
103
104 printf("ctime1: %ld, ctime2: %ld\nmtime1: %ld, mtime2: %ld\n",
105 ctime1, ctime2, mtime1, mtime2);
106 if (ctime2 == ctime1 || mtime2 == mtime1) {
107 printf("Test FAILED: "
108 "st_ctime and st_mtime were not updated properly\n");
109 unlink(tmpfname);
110 return PTS_FAIL;
111 }
112
113 munmap(pa, size);
114 close(fd);
115 unlink(tmpfname);
116 printf("Test PASSED\n");
117 return PTS_PASS;
118 }
119