Thanks, Ken.

That gives me info on MY executing program. I need info on a different program.

To be specific, this is part of a script to monitor Oracle databases. Oracle can be installed multiple times on a server in multiple ORACLE_HOMEs. Each home can have zero or more running instances. I am trying to match the instances with the homes. Using the ps system call combined with grep I can find the PIDs of all the running instances. However, the cmd listed is just the basename, not the full path. WHICH doesn't help, since that just tells me the first exe resolved based on my PATH environment variable, not the particular copy that is executing. On Linux, the full path of executing processes are softlinked under /proc/$PID/exe. However, only the process owner and root can resolve the target of that link. I can sudo readlink (as in my script), but to do it in a shell script is ugly and/or AWKward. I would prefer to do it in perl, but I don't know how to sudo the readlink() function call.

In reply to Re^2: elevated privileges for a single call by adalby
in thread elevated privileges for a single call by adalby

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!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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, details, 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, summary, 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.