.

README.md

@@ -24,7 +24,7 @@ Any of: aria2c / wget / curl
 
 1. Download this repo to anywhere.
 2. Modify `init.settings` and `runtime.settings`.
-3. Add `* * * * * flock -n /tmp/.vmm.lockfile /path/to/your/cron-callback.sh` into your crontab.
+3. Add `* * * * * /path/to/your/cron-callback.sh` into your crontab.
 
 ## Supported cloudimg
 

cron-callback.sh

@@ -2,7 +2,7 @@
 
 # You may change this directory
 workdir=./data
-ver=1.0.61
+ver=1.0.62
 
 _self_bin_name="$0"
 function where_is_him () {
@@ -165,6 +165,14 @@ function do_start () {
     done < "$_script_path/runtime.settings"
 }
 
+# Check if current script is already running. Stupid flock is very unreliable.
+for pid in $(pidof -x "$0"); do
+    if [ $pid != $$ ]; then
+        echo "$0 : Process is already running with PID $pid"
+        exit 1
+    fi
+done
+
 mkdir -p "$workdir"
 cd "$workdir" || exit $?
 mkdir -p base vm tmp