Detect if script already running

[wveldeman]

There is something -at first sight very basic- I would like to do: when I start a vbs script, I want to display a warning if this same vbs is already running (to avoid file in use problems etc).

Two options I see:
work with a temporary file created at the start of the vbs and removed at the end of it. Disadvantage: if the script ever crashes, the temporary file will not be removed.

Second option I see is to work with wmi Win32_process: collect all processes on the pc and use string manipulation to see if wscript/cscript + name-of-script is found more then once in it. Seems doable - but I wonder if there is no more streightforward solution ?

Greetz

 

[Hasfurt]

When a script runs it does not run as the name of the script. Every script runs as wscript.exe in taskmanager.

 

[brianashman]

A file or registry entry could be created when the script runs & destroyed when the script ends. But before acutally creating the file or entry, the script would check for the presence of the file/reg. entry. If it is there, the script must already be running.