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glibc/libio/tst-atime.c
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#include <errno.h> | |
#include <fcntl.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <sys/stat.h> | |
#include <sys/statvfs.h> | |
static int do_test (void); | |
#define TEST_FUNCTION do_test () | |
#define TIMEOUT 5 | |
#include <test-skeleton.c> | |
static int | |
do_test (void) | |
{ | |
char *buf; | |
int fd; | |
FILE *fp; | |
int ch; | |
struct stat st1; | |
struct stat st2; | |
buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX"); | |
if (buf == NULL) | |
{ | |
printf ("cannot allocate memory: %m\n"); | |
return 1; | |
} | |
stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX"); | |
fd = mkstemp (buf); | |
if (fd == -1) | |
{ | |
printf ("cannot open temporary file: %m\n"); | |
return 1; | |
} | |
#ifdef ST_NOATIME | |
/* Make sure the filesystem doesn't have the noatime option set. If | |
statvfs is not available just continue. */ | |
struct statvfs sv; | |
int e = fstatvfs (fd, &sv); | |
if (e != ENOSYS) | |
{ | |
if (e != 0) | |
{ | |
printf ("cannot statvfs '%s': %m\n", buf); | |
return 1; | |
} | |
if ((sv.f_flag & ST_NOATIME) != 0) | |
{ | |
puts ("Bah! The filesystem is mounted with noatime"); | |
return 0; | |
} | |
} | |
#endif | |
/* Make sure it gets removed. */ | |
add_temp_file (buf); | |
if (write (fd, "some string\n", 12) != 12) | |
{ | |
printf ("cannot write temporary file: %m\n"); | |
return 1; | |
} | |
if (lseek (fd, 0, SEEK_SET) == (off_t) -1) | |
{ | |
printf ("cannot reposition temporary file: %m\n"); | |
return 1; | |
} | |
fp = fdopen (fd, "r"); | |
if (fp == NULL) | |
{ | |
printf ("cannot create stream: %m\n"); | |
return 1; | |
} | |
if (fstat (fd, &st1) == -1) | |
{ | |
printf ("first stat failed: %m\n"); | |
return 1; | |
} | |
sleep (2); | |
ch = fgetc (fp); | |
if (ch != 's') | |
{ | |
printf ("did not read correct character: got '%c', expected 's'\n", ch); | |
return 1; | |
} | |
if (fstat (fd, &st2) == -1) | |
{ | |
printf ("second stat failed: %m\n"); | |
return 1; | |
} | |
if (st1.st_atime > st2.st_atime) | |
{ | |
puts ("second atime smaller"); | |
return 1; | |
} | |
else if (st1.st_atime == st2.st_atime) | |
{ | |
puts ("atime has not changed"); | |
return 1; | |
} | |
fclose (fp); | |
return 0; | |
} |