in reply to
Re: Re: Re: Re: Determine if script is already running
in thread Determine if script is already running
Not that I know of. There are things you can do to reduce the probability that the file will be accidentally deleted - security through obscurity. These things include:
Changing the directory where the file resides permissions to 000.
Use non-typical characters in the file name such as a space, asterick, or worse.
Use alarm for the original script to check if the file has been deleted and re-create. * This requires a lot of overhead to try and compete with the race condition.
Use hard links (not symbolic) so that more than one file combined equal your lock file
Even with these suggestions, there is not the 100% guarantee. Sometimes you need decide that the probability is an acceptable risk and move on. If you are totally against checking the process table - semaphores may be the way to go.
Cheers - L~R