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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, fp);

  _flockfile (fp);

  result = __sferror (fp);

  _funlockfile (fp);

  return result;

}