Fix an fcntl example in perlopentut, spotted by MJD.

p4raw-id: //depot/perl@22301

diff --git a/pod/perlopentut.pod b/pod/perlopentut.pod
index 0b60096..3116f78 100644 (file)
--- a/pod/perlopentut.pod
+++ b/pod/perlopentut.pod
@@ -723,7 +723,9 @@ With descriptors that you haven't opened using C<sysopen>, such as
 sockets, you can set them to be non-blocking using C<fcntl>:
 
     use Fcntl;
-    fcntl(Connection, F_SETFL, O_NONBLOCK) 
+    my $old_flags = fcntl($handle, F_GETFL, 0) 
+        or die "can't get flags: $!";
+    fcntl($handle, F_SETFL, $old_flags | O_NONBLOCK) 
         or die "can't set non blocking: $!";
 
 Rather than losing yourself in a morass of twisting, turning C<ioctl>s,