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glibc/stdio-common/tst-fseek.c
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/* Tests of fseek and fseeko. | |
Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2000. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <error.h> | |
#include <errno.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <time.h> | |
#include <sys/stat.h> | |
static int | |
do_test (void) | |
{ | |
const char *tmpdir; | |
char *fname; | |
int fd; | |
FILE *fp; | |
const char outstr[] = "hello world!\n"; | |
char strbuf[sizeof outstr]; | |
char buf[200]; | |
struct stat64 st1; | |
struct stat64 st2; | |
int result = 0; | |
tmpdir = getenv ("TMPDIR"); | |
if (tmpdir == NULL || tmpdir[0] == '\0') | |
tmpdir = "/tmp"; | |
asprintf (&fname, "%s/tst-fseek.XXXXXX", tmpdir); | |
if (fname == NULL) | |
error (EXIT_FAILURE, errno, "cannot generate name for temporary file"); | |
/* Create a temporary file. */ | |
fd = mkstemp (fname); | |
if (fd == -1) | |
error (EXIT_FAILURE, errno, "cannot open temporary file"); | |
fp = fdopen (fd, "w+"); | |
if (fp == NULL) | |
error (EXIT_FAILURE, errno, "cannot get FILE for temporary file"); | |
setbuffer (fp, strbuf, sizeof (outstr) -1); | |
if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: write error\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
/* The EOF flag must be reset. */ | |
if (fgetc (fp) != EOF) | |
{ | |
printf ("%d: managed to read at end of file\n", __LINE__); | |
result = 1; | |
} | |
else if (! feof (fp)) | |
{ | |
printf ("%d: EOF flag not set\n", __LINE__); | |
result = 1; | |
} | |
if (fseek (fp, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: fseek(fp, 0, SEEK_CUR) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (feof (fp)) | |
{ | |
printf ("%d: fseek() didn't reset EOF flag\n", __LINE__); | |
result = 1; | |
} | |
/* Do the same for fseeko(). */ | |
if (fgetc (fp) != EOF) | |
{ | |
printf ("%d: managed to read at end of file\n", __LINE__); | |
result = 1; | |
} | |
else if (! feof (fp)) | |
{ | |
printf ("%d: EOF flag not set\n", __LINE__); | |
result = 1; | |
} | |
if (fseeko (fp, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: fseek(fp, 0, SEEK_CUR) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (feof (fp)) | |
{ | |
printf ("%d: fseek() didn't reset EOF flag\n", __LINE__); | |
result = 1; | |
} | |
/* Go back to the beginning of the file: absolute. */ | |
if (fseek (fp, 0, SEEK_SET) != 0) | |
{ | |
printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
/* Now with fseeko. */ | |
if (fseeko (fp, 0, SEEK_SET) != 0) | |
{ | |
printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
/* Go back to the beginning of the file: relative. */ | |
if (fseek (fp, -((int) sizeof (outstr) - 1), SEEK_CUR) != 0) | |
{ | |
printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
/* Now with fseeko. */ | |
if (fseeko (fp, -((int) sizeof (outstr) - 1), SEEK_CUR) != 0) | |
{ | |
printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
/* Go back to the beginning of the file: from the end. */ | |
if (fseek (fp, -((int) sizeof (outstr) - 1), SEEK_END) != 0) | |
{ | |
printf ("%d: fseek(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseek(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
/* Now with fseeko. */ | |
if (fseeko (fp, -((int) sizeof (outstr) - 1), SEEK_END) != 0) | |
{ | |
printf ("%d: fseeko(fp, 0, SEEK_SET) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fflush (fp) != 0) | |
{ | |
printf ("%d: fflush() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (lseek (fd, 0, SEEK_CUR) != 0) | |
{ | |
printf ("%d: lseek() returned different position\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: fread() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0) | |
{ | |
printf ("%d: content after fseeko(,,SEEK_SET) wrong\n", __LINE__); | |
result = 1; | |
} | |
if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: write error 2\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: write error 3\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: write error 4\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1) | |
{ | |
printf ("%d: write error 5\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
if (fputc ('1', fp) == EOF || fputc ('2', fp) == EOF) | |
{ | |
printf ("%d: cannot add characters at the end\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
/* Check the access time. */ | |
if (fstat64 (fd, &st1) < 0) | |
{ | |
printf ("%d: fstat64() before fseeko() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else | |
{ | |
sleep (1); | |
if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_CUR) != 0) | |
{ | |
printf ("%d: fseek() after write characters failed\n", __LINE__); | |
result = 1; | |
goto out; | |
} | |
else | |
{ | |
time_t t; | |
/* Make sure the timestamp actually can be different. */ | |
sleep (1); | |
t = time (NULL); | |
if (fstat64 (fd, &st2) < 0) | |
{ | |
printf ("%d: fstat64() after fseeko() failed\n\n", __LINE__); | |
result = 1; | |
} | |
if (st1.st_ctime >= t) | |
{ | |
printf ("%d: st_ctime not updated\n", __LINE__); | |
result = 1; | |
} | |
if (st1.st_mtime >= t) | |
{ | |
printf ("%d: st_mtime not updated\n", __LINE__); | |
result = 1; | |
} | |
if (st1.st_ctime >= st2.st_ctime) | |
{ | |
printf ("%d: st_ctime not changed\n", __LINE__); | |
result = 1; | |
} | |
if (st1.st_mtime >= st2.st_mtime) | |
{ | |
printf ("%d: st_mtime not changed\n", __LINE__); | |
result = 1; | |
} | |
} | |
} | |
if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp) | |
!= 2 + 2 * (sizeof (outstr) - 1)) | |
{ | |
printf ("%d: reading 2 records plus bits failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0 | |
|| memcmp (&buf[sizeof (outstr) - 1], outstr, | |
sizeof (outstr) - 1) != 0 | |
|| buf[2 * (sizeof (outstr) - 1)] != '1' | |
|| buf[2 * (sizeof (outstr) - 1) + 1] != '2') | |
{ | |
printf ("%d: reading records failed\n", __LINE__); | |
result = 1; | |
} | |
else if (ungetc ('9', fp) == EOF) | |
{ | |
printf ("%d: ungetc() failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_END) != 0) | |
{ | |
printf ("%d: fseek after ungetc failed\n", __LINE__); | |
result = 1; | |
} | |
else if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp) | |
!= 2 + 2 * (sizeof (outstr) - 1)) | |
{ | |
printf ("%d: reading 2 records plus bits failed\n", __LINE__); | |
result = 1; | |
} | |
else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0 | |
|| memcmp (&buf[sizeof (outstr) - 1], outstr, | |
sizeof (outstr) - 1) != 0 | |
|| buf[2 * (sizeof (outstr) - 1)] != '1') | |
{ | |
printf ("%d: reading records for the second time failed\n", __LINE__); | |
result = 1; | |
} | |
else if (buf[2 * (sizeof (outstr) - 1) + 1] == '9') | |
{ | |
printf ("%d: unget character not ignored\n", __LINE__); | |
result = 1; | |
} | |
else if (buf[2 * (sizeof (outstr) - 1) + 1] != '2') | |
{ | |
printf ("%d: unget somehow changed character\n", __LINE__); | |
result = 1; | |
} | |
fclose (fp); | |
fp = fopen (fname, "r"); | |
if (fp == NULL) | |
{ | |
printf ("%d: fopen() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else if (fstat64 (fileno (fp), &st1) < 0) | |
{ | |
printf ("%d: fstat64() before fseeko() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else if (fseeko (fp, 0, SEEK_END) != 0) | |
{ | |
printf ("%d: fseeko(fp, 0, SEEK_END) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (ftello (fp) != st1.st_size) | |
{ | |
printf ("%d: fstat64 st_size %zd ftello %zd\n", __LINE__, | |
(size_t) st1.st_size, (size_t) ftello (fp)); | |
result = 1; | |
} | |
else | |
printf ("%d: SEEK_END works\n", __LINE__); | |
if (fp != NULL) | |
fclose (fp); | |
fp = fopen (fname, "r"); | |
if (fp == NULL) | |
{ | |
printf ("%d: fopen() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else if (fstat64 (fileno (fp), &st1) < 0) | |
{ | |
printf ("%d: fstat64() before fgetc() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else if (fgetc (fp) == EOF) | |
{ | |
printf ("%d: fgetc() before fseeko() failed\n\n", __LINE__); | |
result = 1; | |
} | |
else if (fseeko (fp, 0, SEEK_END) != 0) | |
{ | |
printf ("%d: fseeko(fp, 0, SEEK_END) failed\n", __LINE__); | |
result = 1; | |
} | |
else if (ftello (fp) != st1.st_size) | |
{ | |
printf ("%d: fstat64 st_size %zd ftello %zd\n", __LINE__, | |
(size_t) st1.st_size, (size_t) ftello (fp)); | |
result = 1; | |
} | |
else | |
printf ("%d: SEEK_END works\n", __LINE__); | |
if (fp != NULL) | |
fclose (fp); | |
out: | |
unlink (fname); | |
return result; | |
} | |
#define TIMEOUT 3 | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |