mirror of
https://sourceware.org/git/glibc.git
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426 lines
9.8 KiB
C
426 lines
9.8 KiB
C
/* Tests of fseek and fseeko.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <error.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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int
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main (void)
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{
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const char *tmpdir;
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char *fname;
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int fd;
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FILE *fp;
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const char outstr[] = "hello world!\n";
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char strbuf[sizeof outstr];
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char buf[200];
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struct stat64 st1;
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struct stat64 st2;
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int result = 0;
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tmpdir = getenv ("TMPDIR");
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if (tmpdir == NULL || tmpdir[0] == '\0')
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tmpdir = "/tmp";
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asprintf (&fname, "%s/tst-fseek.XXXXXX", tmpdir);
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if (fname == NULL)
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error (EXIT_FAILURE, errno, "cannot generate name for temporary file");
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/* Create a temporary file. */
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fd = mkstemp (fname);
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if (fd == -1)
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error (EXIT_FAILURE, errno, "cannot open temporary file");
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fp = fdopen (fd, "w+");
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if (fp == NULL)
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error (EXIT_FAILURE, errno, "cannot get FILE for temporary file");
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setbuffer (fp, strbuf, sizeof (outstr) -1);
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if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("write error");
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result = 1;
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goto out;
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}
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/* The EOF flag must be reset. */
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if (fgetc (fp) != EOF)
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{
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puts ("managed to read at end of file");
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result = 1;
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}
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else if (! feof (fp))
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{
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puts ("EOF flag not set");
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result = 1;
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}
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if (fseek (fp, 0, SEEK_CUR) != 0)
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{
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puts ("fseek(fp, 0, SEEK_CUR) failed");
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result = 1;
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}
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else if (feof (fp))
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{
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puts ("fseek() didn't reset EOF flag");
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result = 1;
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}
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/* Do the same for fseeko(). */
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#ifdef USE_IN_LIBIO
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if (fgetc (fp) != EOF)
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{
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puts ("managed to read at end of file");
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result = 1;
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}
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else if (! feof (fp))
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{
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puts ("EOF flag not set");
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result = 1;
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}
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if (fseeko (fp, 0, SEEK_CUR) != 0)
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{
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puts ("fseek(fp, 0, SEEK_CUR) failed");
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result = 1;
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}
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else if (feof (fp))
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{
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puts ("fseek() didn't reset EOF flag");
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result = 1;
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}
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#endif
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/* Go back to the beginning of the file: absolute. */
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if (fseek (fp, 0, SEEK_SET) != 0)
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{
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puts ("fseek(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseek(,,SEEK_SET) wrong");
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result = 1;
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}
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#ifdef USE_IN_LIBIO
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/* Now with fseeko. */
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if (fseeko (fp, 0, SEEK_SET) != 0)
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{
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puts ("fseeko(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseeko(,,SEEK_SET) wrong");
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result = 1;
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}
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#endif
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/* Go back to the beginning of the file: relative. */
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if (fseek (fp, -(sizeof (outstr) - 1), SEEK_CUR) != 0)
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{
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puts ("fseek(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseek(,,SEEK_SET) wrong");
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result = 1;
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}
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#ifdef USE_IN_LIBIO
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/* Now with fseeko. */
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if (fseeko (fp, -(sizeof (outstr) - 1), SEEK_CUR) != 0)
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{
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puts ("fseeko(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseeko(,,SEEK_SET) wrong");
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result = 1;
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}
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#endif
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/* Go back to the beginning of the file: from the end. */
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if (fseek (fp, -(sizeof (outstr) - 1), SEEK_END) != 0)
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{
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puts ("fseek(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseek(,,SEEK_SET) wrong");
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result = 1;
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}
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#ifdef USE_IN_LIBIO
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/* Now with fseeko. */
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if (fseeko (fp, -(sizeof (outstr) - 1), SEEK_END) != 0)
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{
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puts ("fseeko(fp, 0, SEEK_SET) failed");
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result = 1;
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}
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else if (fflush (fp) != 0)
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{
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puts ("fflush() failed");
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result = 1;
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}
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else if (lseek (fd, 0, SEEK_CUR) != 0)
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{
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puts ("lseek() returned different position");
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result = 1;
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}
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else if (fread (buf, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("fread() failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0)
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{
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puts ("content after fseeko(,,SEEK_SET) wrong");
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result = 1;
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}
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#endif
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if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("write error 2");
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result = 1;
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goto out;
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}
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if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("write error 3");
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result = 1;
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goto out;
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}
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if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("write error 4");
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result = 1;
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goto out;
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}
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if (fwrite (outstr, sizeof (outstr) - 1, 1, fp) != 1)
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{
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puts ("write error 5");
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result = 1;
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goto out;
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}
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if (fputc ('1', fp) == EOF || fputc ('2', fp) == EOF)
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{
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puts ("cannot add characters at the end");
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result = 1;
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goto out;
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}
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/* Check the access time. */
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if (fstat64 (fd, &st1) < 0)
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{
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puts ("fstat64() before fseeko() failed\n");
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result = 1;
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}
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else
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{
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sleep (1);
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if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_CUR) != 0)
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{
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puts ("fseek() after write characters failed");
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result = 1;
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goto out;
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}
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else
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{
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time_t t;
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/* Make sure the timestamp actually can be different. */
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sleep (1);
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t = time (NULL);
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if (fstat64 (fd, &st2) < 0)
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{
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puts ("fstat64() after fseeko() failed\n");
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result = 1;
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}
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if (st1.st_ctime >= t)
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{
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puts ("st_ctime not updated");
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result = 1;
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}
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if (st1.st_mtime >= t)
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{
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puts ("st_mtime not updated");
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result = 1;
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}
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if (st1.st_ctime >= st2.st_ctime)
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{
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puts ("st_ctime not changed");
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result = 1;
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}
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if (st1.st_mtime >= st2.st_mtime)
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{
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puts ("st_mtime not changed");
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result = 1;
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}
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}
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}
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if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp)
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!= 2 + 2 * (sizeof (outstr) - 1))
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{
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puts ("reading 2 records plus bits failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0
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|| memcmp (&buf[sizeof (outstr) - 1], outstr,
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sizeof (outstr) - 1) != 0
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|| buf[2 * (sizeof (outstr) - 1)] != '1'
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|| buf[2 * (sizeof (outstr) - 1) + 1] != '2')
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{
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puts ("reading records failed");
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result = 1;
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}
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else if (ungetc ('9', fp) == EOF)
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{
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puts ("ungetc() failed");
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result = 1;
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}
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else if (fseek (fp, -(2 + 2 * (sizeof (outstr) - 1)), SEEK_END) != 0)
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{
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puts ("fseek after ungetc failed");
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result = 1;
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}
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else if (fread (buf, 1, 2 + 2 * (sizeof (outstr) - 1), fp)
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!= 2 + 2 * (sizeof (outstr) - 1))
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{
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puts ("reading 2 records plus bits failed");
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result = 1;
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}
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else if (memcmp (buf, outstr, sizeof (outstr) - 1) != 0
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|| memcmp (&buf[sizeof (outstr) - 1], outstr,
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sizeof (outstr) - 1) != 0
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|| buf[2 * (sizeof (outstr) - 1)] != '1')
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{
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puts ("reading records for the second time failed");
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result = 1;
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}
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else if (buf[2 * (sizeof (outstr) - 1) + 1] == '9')
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{
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puts ("unget character not ignored");
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result = 1;
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}
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else if (buf[2 * (sizeof (outstr) - 1) + 1] != '2')
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{
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puts ("unget somehow changed character");
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result = 1;
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}
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out:
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unlink (fname);
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return result;
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}
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