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Re: Re: First Unix Admin Script - Request for Constructive Critisism

by D.Millin (Beadle)
on Feb 08, 2003 at 23:37 UTC ( [id://233793]=note: print w/replies, xml ) Need Help??


in reply to Re: First Unix Admin Script - Request for Constructive Critisism
in thread First Unix Admin Script - Request for Constructive Critisism

Hi tachyon,

I have been given some thought to your suggestion to have a check_call sub. I guess one approach would be to adapt check_call each type, or class of command. Reporting would still need to be done in plain english for the operators, so instead of passing @stuff, I could always pass in appropriate parameters. BTW, is there any way of redirecting STDOUT,STDERR when system is called in a list context?


Darren
  • Comment on Re: Re: First Unix Admin Script - Request for Constructive Critisism

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Re^3: First Unix Admin Script - Request for Constructive Critisism
by tall_man (Parson) on Feb 09, 2003 at 01:08 UTC
    You ask about redirecting STDOUT and STDERR for system calls given as lists. A good way to do this is with the module IPC::Run.
    use IPC::Run qw( run ) ; run \@cmd, \$in, \$out, \$err;

    One idea you might be able to use for parameterizing your error messages for various commands would be to pass in a hash reference containing explanatory messages indexed by return codes. Also see perlvar for how you can use the variable $! to obtain error message strings after a failed system call.

    Finally, the reason spelled-out file handles are considered "bad style" compared to IO::File is that they create global names, which might conflict with other modules. IO::File uses unique private symbols instead.

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