1#include <errno.h>
2#include <fcntl.h>
3#include <stdio.h>
4#include <stdlib.h>
5#include <string.h>
6#include <unistd.h>
7#include <sys/stat.h>
8#include <sys/statvfs.h>
9
10
11static int do_test (void);
12#define TEST_FUNCTION do_test ()
13#include <test-skeleton.c>
14
15
16static int
17do_test (void)
18{
19 char *buf;
20 int fd;
21 FILE *fp;
22 int ch;
23 struct stat st1;
24 struct stat st2;
25
26 buf = (char *) malloc (size: strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
27 if (buf == NULL)
28 {
29 printf (format: "cannot allocate memory: %m\n");
30 return 1;
31 }
32 stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
33
34 fd = mkstemp (template: buf);
35 if (fd == -1)
36 {
37 printf (format: "cannot open temporary file: %m\n");
38 return 1;
39 }
40
41#ifdef ST_NOATIME
42 /* Make sure the filesystem doesn't have the noatime option set. If
43 statvfs is not available just continue. */
44 struct statvfs sv;
45 int e = fstatvfs (fd, &sv);
46 if (e != ENOSYS)
47 {
48 if (e != 0)
49 {
50 printf (format: "cannot statvfs '%s': %m\n", buf);
51 return 1;
52 }
53
54 if ((sv.f_flag & ST_NOATIME) != 0)
55 {
56 puts (s: "Bah! The filesystem is mounted with noatime");
57 return 0;
58 }
59 }
60#endif
61
62 /* Make sure it gets removed. */
63 add_temp_file (name: buf);
64
65 if (write (fd, "some string\n", 12) != 12)
66 {
67 printf (format: "cannot write temporary file: %m\n");
68 return 1;
69 }
70
71 if (lseek (fd: fd, offset: 0, SEEK_SET) == (off_t) -1)
72 {
73 printf (format: "cannot reposition temporary file: %m\n");
74 return 1;
75 }
76
77 fp = fdopen (fd, "r");
78 if (fp == NULL)
79 {
80 printf (format: "cannot create stream: %m\n");
81 return 1;
82 }
83
84 if (fstat (fd: fd, buf: &st1) == -1)
85 {
86 printf (format: "first stat failed: %m\n");
87 return 1;
88 }
89
90 sleep (seconds: 2);
91
92 ch = fgetc (stream: fp);
93 if (ch != 's')
94 {
95 printf (format: "did not read correct character: got '%c', expected 's'\n", ch);
96 return 1;
97 }
98
99 if (fstat (fd: fd, buf: &st2) == -1)
100 {
101 printf (format: "second stat failed: %m\n");
102 return 1;
103 }
104
105 if (st1.st_atime > st2.st_atime)
106 {
107 puts (s: "second atime smaller");
108 return 1;
109 }
110 else if (st1.st_atime == st2.st_atime)
111 {
112 puts (s: "atime has not changed");
113 return 1;
114 }
115
116 fclose (fp);
117
118 return 0;
119}
120

source code of glibc/libio/tst-atime.c