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/* Test of fbufmode() function.
Copyright (C) 2007-2020 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 3 of the License, 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, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include "fbufmode.h"
#include <stdio.h>
#include "macros.h"
#define TESTFILE "t-fbufmode.tmp"
/* ISO C99 disallows more than one setvbuf call on a given stream,
and HP-UX 11 and musl libc indeed don't support such use of setvbuf.
Therefore allocate a new stream for each possible mode value. */
static int
test_mode (int mode)
{
FILE *fp;
char buf[5];
/* Open it for reading. */
fp = fopen (TESTFILE, "r");
switch (mode)
{
case _IONBF:
ASSERT (setvbuf (fp, NULL, _IONBF, 0) == 0);
ASSERT (fbufmode (fp) == _IONBF);
break;
case _IOLBF:
ASSERT (setvbuf (fp, buf, _IOLBF, 5) == 0);
/* mingw's setvbuf implements _IOLBF the same way as _IOFBF. */
ASSERT (fbufmode (fp) == _IOLBF
|| fbufmode (fp) == _IOFBF);
break;
case _IOFBF:
ASSERT (setvbuf (fp, buf, _IOFBF, 5) == 0);
ASSERT (fbufmode (fp) == _IOFBF);
break;
default:
break;
}
fclose (fp);
return 0;
}
int
main ()
{
int ret;
/* Create a file with some contents. */
{
FILE *fp;
fp = fopen (TESTFILE, "w");
if (fp == NULL)
goto skip;
if (fwrite ("foobarsh", 1, 8, fp) < 8)
goto skip;
if (fclose (fp))
goto skip;
}
ret = test_mode (_IONBF);
if (ret != 0)
goto fail;
ret = test_mode (_IOLBF);
if (ret != 0)
goto fail;
ret = test_mode (_IOFBF);
if (ret != 0)
goto fail;
return 0;
fail:
return ret;
skip:
fprintf (stderr, "Skipping test: file operations failed.\n");
return 77;
}
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