open(FH,undef) # creates new_tmpfile opened read/write

Add t/io/open.t with test for above.

p4raw-id: //depot/perl@3315

2 files changed, 34 insertions, 0 deletions

diff --git a/pp_sys.c b/pp_sys.c
index 45eee0b698..3f4a112276 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -506,6 +506,18 @@ PP(pp_open)
 	DIE(PL_no_usym, "filehandle");
     if (GvIOp(gv))
 	IoFLAGS(GvIOp(gv)) &= ~IOf_UNTAINT;
+    if (sv == &PL_sv_undef) {
+#ifdef PerlIO
+	PerlIO *fp = PerlIO_tmpfile();
+#else
+	PerlIO *fp = tmpfile();
+#endif                   
+	if (fp != Nullfp && do_open(gv, "+>&", 3, FALSE, 0, 0, fp)) 
+	    PUSHi( (I32)PL_forkprocess );
+	else
+	    RETPUSHUNDEF;
+	RETURN;
+    }   
     tmps = SvPV(sv, len);
     if (do_open(gv, tmps, len, FALSE, O_RDONLY, 0, Nullfp))
 	PUSHi( (I32)PL_forkprocess );
diff --git a/t/io/open.t b/t/io/open.t
new file mode 100755
index 0000000000..819393f29b
--- /dev/null
+++ b/t/io/open.t
@@ -0,0 +1,22 @@
+#!./perl
+
+# $RCSfile$    
+$| = 1;
+
+print "1..6\n";
+
+print "$!\nnot " unless open(A,undef);
+print "ok 1\n";
+print "not " unless print A "SomeData\n";
+print "ok 2\n";
+print "not " unless tell(A) == 9;
+print "ok 3\n";
+print "not " unless seek(A,0,0);
+print "ok 4\n";
+$b = <A>;
+print "not " unless $b eq "SomeData\n";
+print "ok 5\n";
+print "not " unless close(A);
+print "ok 6\n";
+     
+