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/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
FUNCTION
<<ferror>>---test whether read/write error has occurred
INDEX
ferror
ANSI_SYNOPSIS
#include <stdio.h>
int ferror(FILE *<[fp]>);
TRAD_SYNOPSIS
#include <stdio.h>
int ferror(<[fp]>)
FILE *<[fp]>;
DESCRIPTION
The <<stdio>> functions maintain an error indicator with each file
pointer <[fp]>, to record whether any read or write errors have
occurred on the associated file or stream.
Use <<ferror>> to query this indicator.
See <<clearerr>> to reset the error indicator.
RETURNS
<<ferror>> returns <<0>> if no errors have occurred; it returns a
nonzero value otherwise.
PORTABILITY
ANSI C requires <<ferror>>.
No supporting OS subroutines are required.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
#include <_ansi.h>
#include <stdio.h>
#include "local.h"
/* A subroutine version of the macro ferror. */
#undef ferror
int
_DEFUN(ferror, (fp),
FILE * fp)
{
int result;
CHECK_INIT(_REENT);
_flockfile (fp);
result = __sferror (fp);
_funlockfile (fp);
return result;
}
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