Take away the infamous io/dup.t #7.

It seems there simply is no way to portably
"flush" an input file handle.

p4raw-id: //depot/cfgperl@4176

2 files changed, 2 insertions, 24 deletions

diff --git a/doio.c b/doio.c
index 0b1cdd1ec4..793b54059c 100644
--- a/doio.c
+++ b/doio.c
@@ -283,17 +283,8 @@ 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. --mjd
-			     * Unfortunately SEEK_CURing 0 seems to
-			     * be optimized away on most platforms;
-			     * only Solaris and Linux seem to flush
-			     * on that. --jhi */
+				/* Flush stdio buffer before dup */
 			    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';
diff --git a/t/io/dup.t b/t/io/dup.t
index 9ad823fff7..af13d4d8f7 100755
--- a/t/io/dup.t
+++ b/t/io/dup.t
@@ -2,7 +2,7 @@
 
 # $RCSfile: dup.t,v $$Revision: 4.1 $$Date: 92/08/07 18:27:27 $
 
-print "1..7\n";
+print "1..6\n";
 
 print "ok 1\n";
 
@@ -38,16 +38,3 @@ unlink 'Io.dup';
 
 print STDOUT "ok 6\n";
 
-# 7  # 19990811 mjd@plover.com
-my ($out1, $out2) = ("Line 1\n", "Line 2\n");
-open(W, "> Io.dup") || die "Can't open stdout";
-print W $out1, $out2;
-close W;
-open(R1, "< Io.dup") || die "Can't read temp file";
-$in1 = <R1>;
-open(R2, "<&R1") || die "Can't dup";
-$in2 = <R2>;
-print "not " unless $in1 eq $out1 && $in2 eq $out2;
-print "ok 7\n";
-
-unlink("Io.dup");