X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffreadable.c;h=050b19a2e45504e5be1bc0002e10f4e104a54254;hb=0815daf810f59e2da6778367a2000bdd25af71b4;hp=065eb3f0015341c29b57b5e32aa681d654763ab1;hpb=75fb803d0df021f3983da81735094adce7dd3009;p=gnulib.git

diff --git a/lib/freadable.c b/lib/freadable.c
index 065eb3f00..050b19a2e 100644
--- a/lib/freadable.c
+++ b/lib/freadable.c
@@ -1,5 +1,5 @@
 /* Retrieve information about a FILE stream.
-   Copyright (C) 2007-2011 Free Software Foundation, Inc.
+   Copyright (C) 2007-2012 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
@@ -21,6 +21,10 @@
 
 #include "stdio-impl.h"
 
+#if defined EPLAN9                  /* Plan9 */
+# include <fcntl.h>
+#endif
+
 bool
 freadable (FILE *fp)
 {
@@ -29,16 +33,30 @@ freadable (FILE *fp)
      fast macros.  */
 #if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   return (fp->_flags & _IO_NO_READS) == 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 | __SRD)) != 0;
 #elif defined __EMX__               /* emx+gcc */
   return (fp->_flags & (_IORW | _IOREAD)) != 0;
+#elif defined __minix               /* Minix */
+  return (fp->_flags & _IOREAD) != 0;
 #elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
   return (fp->_flag & (_IORW | _IOREAD)) != 0;
 #elif defined __QNX__               /* QNX */
   return (fp->_Mode & 0x1 /* _MOPENR */) != 0;
 #elif defined __MINT__              /* Atari FreeMiNT */
   return fp->__mode.__read;
+#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_RDONLY || flags == O_RDWR);
+        }
+    }
+  return 0;
 #else
 # error "Please port gnulib freadable.c to your platform! Look at the definition of fopen, fdopen on your system, then report this to bug-gnulib."
 #endif