Determine if only one instance is running: Difference between revisions

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@@ Line 751: / Line 751: @@
 sleep 60; # then your code goes here</lang>
 =={{header|Perl 6}}==
-{{works with|rakudo|2015-09-09}}
+{{works with|rakudo|2018.03}}
 An old-school Unix solution, none the worse for the wear:
 <lang perl6>my $name = $*PROGRAM-NAME;
@@ Line 770: / Line 770: @@
 $pidfile.close;
-if try link($lockfile, $lockpid) {
+if try link($lockpid, $lockfile) {
     $havelock = True;
 }