1 /* Set the error indicator of a stream.
2 Copyright (C) 2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
28 /* Most systems provide FILE as a struct and the necessary bitmask in
29 <stdio.h>, because they need it for implementing getc() and putc() as
31 #if defined _IO_ferror_unlocked /* GNU libc, BeOS */
32 fp->_flags |= _IO_ERR_SEEN;
33 #elif defined __sferror /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
35 #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
38 /* Portable fallback, based on an idea by Rich Felker.
39 Wow! 6 system calls for something that is just a bit operation! */
51 fputc ('\0', fp); /* This should set the error indicator. */
52 fflush (fp); /* Or this. */
53 if (dup2 (fd2, fd) < 0)
54 /* Whee... we botched the stream and now cannot restore it! */