Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Nitrox,
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


    In reply to Re: Re: Re: Re: Re: Determine if script is already running by Limbic~Region
    in thread Determine if script is already running by Nitrox

    Title:
    Use:  <p> text here (a paragraph) </p>
    and:  <code> code here </code>
    to format your post; it's "PerlMonks-approved HTML":



    • Are you posting in the right place? Check out Where do I post X? to know for sure.
    • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
      <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
    • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
    • Want more info? How to link or How to display code and escape characters are good places to start.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Domain Nodelet?
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this?Last hourOther CB clients
    Other Users?
    Others examining the Monastery: (6)
    As of 2024-03-28 21:23 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      No recent polls found