X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=doio.c;h=2baecec6b1a8d5ba31604c7b6446af4eb1214a73;hb=9741dab02becad0550bba7d5ca9e59f8ac608b2d;hp=793b54059ca207ad226e9657e1763b321bcd102e;hpb=b7a02c4fb533bb0a7ae92f82a4a660045d95669a;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/doio.c b/doio.c
index 793b540..2baecec 100644
--- a/doio.c
+++ b/doio.c
@@ -141,7 +141,7 @@ Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
     }
 
     if (as_raw) {
-#if defined(USE_64_BIT_OFFSETS) && defined(O_LARGEFILE)
+#if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE)
 	rawmode |= O_LARGEFILE;
 #endif
 
@@ -283,8 +283,17 @@ Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw,
 			}
 			if (IoIFP(thatio)) {
 			    PerlIO *fp = IoIFP(thatio);
-				/* Flush stdio buffer before dup */
+			    /* Flush stdio buffer before dup. --mjd
+			     * Unfortunately SEEK_CURing 0 seems to
+			     * be optimized away on most platforms;
+			     * only Solaris and Linux seem to flush
+			     * on that. --jhi */
 			    PerlIO_seek(fp, 0, SEEK_CUR);
+			    /* On the other hand, do all platforms
+			     * take gracefully to flushing a read-only
+			     * filehandle?  Perhaps we should do
+			     * fsetpos(src)+fgetpos(dst)?  --nik */
+			    PerlIO_flush(fp);
 			    fd = PerlIO_fileno(fp);
 			    if (IoTYPE(thatio) == 's')
 				IoTYPE(io) = 's';