X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2F_PDCLIB%2Fprepread.c;h=91bcdf4153d3b1467a0630de41ca0223b0752ab3;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=ef2f70ed72bcda6962745d0b1d053a7c0000e7bf;hpb=9e1a90fce7fa732ebca11e98a41dc8418746b942;p=pdclib

diff --git a/functions/_PDCLIB/prepread.c b/functions/_PDCLIB/prepread.c
index ef2f70e..91bcdf4 100644
--- a/functions/_PDCLIB/prepread.c
+++ b/functions/_PDCLIB/prepread.c
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /* _PDCLIB_prepread( struct _PDCLIB_file_t * )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -8,7 +6,6 @@
 
 #include <stdio.h>
 
-#define _PDCLIB_GLUE_H _PDCLIB_GLUE_H
 #include <_PDCLIB_glue.h>
 
 int _PDCLIB_prepread( struct _PDCLIB_file_t * stream )
@@ -17,7 +14,11 @@ int _PDCLIB_prepread( struct _PDCLIB_file_t * stream )
          ( stream->status & ( _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_ERRORFLAG | _PDCLIB_WIDESTREAM | _PDCLIB_EOFFLAG ) ) ||
          ! ( stream->status & ( _PDCLIB_FREAD | _PDCLIB_FRW ) ) )
     {
-        _PDCLIB_errno = _PDCLIB_EIO;
+        /* Function called on illegal (e.g. output) stream.
+           See comments on implementation-defined errno values in
+           <_PDCLIB_config.h>.
+        */
+        _PDCLIB_errno = _PDCLIB_ERROR;
         stream->status |= _PDCLIB_ERRORFLAG;
         return EOF;
     }