X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffreadptr.c;h=26c66edebb0771e92c93fec9334b80a5f1708434;hb=7ef6c64e210ac0979d7e8ac69bc5b5208c2405ab;hp=3abe58e6398de83ad116e0d5c7daf283591780ed;hpb=81fe603b84b9ab4565593f0b38b30274dbb73980;p=gnulib.git

diff --git a/lib/freadptr.c b/lib/freadptr.c
index 3abe58e63..26c66edeb 100644
--- a/lib/freadptr.c
+++ b/lib/freadptr.c
@@ -1,5 +1,5 @@
 /* Retrieve information about a FILE stream.
-   Copyright (C) 2007-2009 Free Software Foundation, Inc.
+   Copyright (C) 2007-2014 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
@@ -37,7 +37,7 @@ freadptr (FILE *fp, size_t *sizep)
     return NULL;
   *sizep = size;
   return (const char *) fp->_IO_read_ptr;
-#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 */
   if ((fp_->_flags & __SWR) != 0 || fp_->_r < 0)
     return NULL;
   size = fp_->_r;
@@ -56,7 +56,15 @@ freadptr (FILE *fp, size_t *sizep)
     abort ();
   *sizep = fp->_rcount;
   return fp->_ptr;
-#elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
+#elif defined __minix               /* Minix */
+  if ((fp_->_flags & _IOWRITING) != 0)
+    return NULL;
+  size = fp_->_count;
+  if (size == 0)
+    return NULL;
+  *sizep = size;
+  return (const char *) fp_->_ptr;
+#elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
   if ((fp_->_flag & _IOWRT) != 0)
     return NULL;
   size = fp_->_cnt;
@@ -93,6 +101,13 @@ freadptr (FILE *fp, size_t *sizep)
     return NULL;
   *sizep = size;
   return fp->__bufp;
+#elif defined EPLAN9                /* Plan9 */
+  if (fp->state == 4 /* WR */)
+    return NULL;
+  if (fp->rp >= fp->wp)
+    return NULL;
+  *sizep = fp->wp - fp->rp;
+  return fp->rp;
 #elif defined SLOW_BUT_NO_HACKS     /* users can define this */
   /* This implementation is correct on any ANSI C platform.  It is just
      awfully slow.  */