| /* Tests of fseek and fseeko. |
| Copyright (C) 2000-2014 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> |
| |
| |
| int |
| main (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; |
| } |
