Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
My script runs a command on a Linux system. For example:
while ( my $user = <$fh> ) { chomp $user; my $out = $system->adduser( login => $user ); if ( $out =~ /something/ ) { do this; } }

Now, in my subroutine I want to run useradd $login and grab the output from the system. If the output is an error (e.g., user already exists), I want to return something like, "ERROR: $login already exists\n", or "ERROR: $login is not a valid UNIX username\n"... If it worked, it should return something like, "SUCCESS: $login added to system" Currently I am croaking if it's not a success, but that destroys my while loop.

Basically, what's the best way to return an error message from a subroutine, and a success message if it succeeds?

I've read the following:
http://www.perlmonks.org/?node_id=113166
http://www.perl.com/pub/2002/11/14/exception.html

While interesting, I know Perl has changed a lot in the past few years, so trying to get an updated opinion on the matter. Thanks!


In reply to Question regarding handling exceptions in subroutine by walkingthecow

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
  • Outside of code tags, you may need to use entities for some characters:
            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 2014-07-10 09:20 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      When choosing user names for websites, I prefer to use:








      Results (203 votes), past polls