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[glibc.git] / stdio / ferror.c
blob5ccc9abb3749fafe56e0cace6418ca2b64f54a0f
1 /* Copyright (C) 1991, 1996, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <stdio.h>
22 #undef ferror
23 #undef ferror_unlocked
26 /* Return non-zero if STREAM has its error indicator set. */
27 int
28 ferror (stream)
29 FILE *stream;
31 if (!__validfp (stream))
33 __set_errno (EINVAL);
34 return -1;
37 return stream->__error;
40 weak_alias (ferror, ferror_unlocked)