Protect log rotation operations by lock

webif/lib/bin/manage_logs

@@ -1,13 +1,20 @@
 #!/mod/bin/jimsh
 
 source /mod/webif/lib/setup
-require settings.class
+require settings.class lock
 
 set s [settings]
 set logsize [$s logsize]
 set logkeep [$s logkeep]
 set logage [$s logage]
 
+defer {catch {release_lock webif_autolog}}
+if {![acquire_lock webif_autolog]} {
+	acquire_lock webif_autolog 10 1
+	puts "Could not acquire exclusive lock, terminating."
+	exit
+}
+
 puts "Rotating at $logsize, keeping $logkeep, max age $logage"
 
 set logdir "/mod/tmp"