/* Retrieve information about a FILE stream.
- Copyright (C) 2007-2012 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 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
#include "stdio-impl.h"
+#if defined EPLAN9 /* Plan9 */
+# include <fcntl.h>
+#endif
+
bool
fwritable (FILE *fp)
{
fast macros. */
#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
return (fp->_flags & _IO_NO_WRITES) == 0;
-#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
return (fp_->_flags & (__SRW | __SWR)) != 0;
#elif defined __EMX__ /* emx+gcc */
return (fp->_flags & (_IORW | _IOWRT)) != 0;
return (fp->_Mode & 0x2 /* _MOPENW */) != 0;
#elif defined __MINT__ /* Atari FreeMiNT */
return fp->__mode.__write;
+#elif defined EPLAN9 /* Plan9 */
+ int fd = fp->fd;
+ if (fd >= 0)
+ {
+ int flags = fcntl (fd, F_GETFL, NULL);
+ if (flags >= 0)
+ {
+ flags &= O_ACCMODE;
+ return (flags == O_WRONLY || flags == O_RDWR);
+ }
+ }
+ return 0;
#else
# error "Please port gnulib fwritable.c to your platform! Look at the definition of fopen, fdopen on your system, then report this to bug-gnulib."
#endif