FAQ 8.33 Is there a way to hide perl's command line from programs such as "ps"?

Discussion in 'Perl Misc' started by PerlFAQ Server, Apr 20, 2011.

  1. This is an excerpt from the latest version perlfaq8.pod, which
    comes with the standard Perl distribution. These postings aim to
    reduce the number of repeated questions as well as allow the community
    to review and update the answers. The latest version of the complete
    perlfaq is at http://faq.perl.org .

    --------------------------------------------------------------------

    8.33: Is there a way to hide perl's command line from programs such as "ps"?

    First of all note that if you're doing this for security reasons (to
    avoid people seeing passwords, for example) then you should rewrite your
    program so that critical information is never given as an argument.
    Hiding the arguments won't make your program completely secure.

    To actually alter the visible command line, you can assign to the
    variable $0 as documented in perlvar. This won't work on all operating
    systems, though. Daemon programs like sendmail place their state there,
    as in:

    $0 = "orcus [accepting connections]";



    --------------------------------------------------------------------

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    so please include as much information as possible and relevant in any
    corrections. The perlfaq-workers also don't have access to every
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    corrections to examples that do not work on particular platforms.
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    PerlFAQ Server, Apr 20, 2011
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