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

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
* How can I add start/stop commands for the script.

One way to do it would be to add the respective options to your script (as you're already using Getopt::Long, this should be rather straightforward).  The implementation would typically involve a pid-file to store the PID which you need to communicate with a potentially running instance of the script. Something like:

  • start

    • Check if there's a pid-file.
    • If so, read the PID from the file, and send that PID signal number zero to check if it's still alive.
    • If it is alive, output "... already running", and quit.
    • In case no running instance is found, start the daemon the same way you would do from the command line. When successful, create a pid-file containing the PID of the process.

  • stop

    • Check if there's a pid-file.
    • If there is no pid-file, output "... doesn't seem to be running", and quit.
    • Otherwise, read the PID from the file, and send that PID the TERM signal (or whatever signal makes your script quit gracefully).
    • Delete the pid-file. (In case you're paranoid, you might want to wait a while and then check whether the TERM signal did actually terminate the process, before deleting the pid-file. If not, output an error message.)


In reply to Re: Executing script in normal/daemon mode and adding start/stop capability by almut
in thread Executing script in normal/daemon mode and adding start/stop capability by chanakya

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



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (8)
    As of 2015-07-30 00:23 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (269 votes), past polls