X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2F_PDCLIB%2Fprepread.c;h=d2288c7455d188e552c87c94410d47ca3059dd12;hb=9f87d9e27e74d9e06e0c93114ffd70a45ee152fa;hp=ef2f70ed72bcda6962745d0b1d053a7c0000e7bf;hpb=9e1a90fce7fa732ebca11e98a41dc8418746b942;p=pdclib

diff --git a/functions/_PDCLIB/prepread.c b/functions/_PDCLIB/prepread.c
index ef2f70e..d2288c7 100644
--- a/functions/_PDCLIB/prepread.c
+++ b/functions/_PDCLIB/prepread.c
@@ -8,7 +8,6 @@
 
 #include <stdio.h>
 
-#define _PDCLIB_GLUE_H _PDCLIB_GLUE_H
 #include <_PDCLIB_glue.h>
 
 int _PDCLIB_prepread( struct _PDCLIB_file_t * stream )
@@ -17,7 +16,11 @@ 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;
     }