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/* Test of fpurge() function.
Copyright (C) 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include "fpurge.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
abort (); \
} \
} \
while (0)
#define TESTFILE "t-fpurge.tmp"
int
main ()
{
FILE *fp;
/* Create a file with some contents. */
fp = fopen (TESTFILE, "w");
if (fp == NULL)
goto skip;
if (fwrite ("foobarsh", 1, 8, fp) < 8)
goto skip;
if (fclose (fp))
goto skip;
/* Open it in read-write mode. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
if (fseek (fp, 3, SEEK_CUR))
goto skip;
if (fwrite ("g", 1, 1, fp) < 1)
goto skip;
if (fflush (fp))
goto skip;
if (fwrite ("az", 1, 2, fp) < 2)
goto skip;
ASSERT (fpurge (fp) == 0);
ASSERT (fclose (fp) == 0);
/* Open it in read-only mode. */
fp = fopen (TESTFILE, "r");
if (fp == NULL)
goto skip;
{
char buf[8];
if (fread (buf, 1, 8, fp) < 8)
goto skip;
ASSERT (memcmp (buf, "foogarsh", 8) == 0);
}
ASSERT (fpurge (fp) == 0);
ASSERT (fclose (fp) == 0);
return 0;
skip:
fprintf (stderr, "Skipping test: file operations failed.\n");
return 77;
}
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