Checking and verifying a unix command sent in Perl

razzz has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Checking and verifying a unix command sent in Perl by ikegami (Patriarch) on Jul 19, 2009 at 05:47 UTC
`system` already provides the child's exit code as its return value. `$ true $ echo $? 0 $ perl -le'print system("true") >> 8' 0 $ false $ echo $? 1 $ perl -le'print system("false") >> 8' 1` [download] Echoing it and capturing it is a waste.	[reply] [d/l] [select]
Re: Checking and verifying a unix command sent in Perl by jrsimmon (Hermit) on Jul 19, 2009 at 04:34 UTC
The backtick operator `$command`; captures STDOUT from the `$command` issued. It does not capture STDERR (though you can tell the shell to send both STDOUT, if you want it). See perlop for the details.	[reply] [d/l] [select]
Re: Checking and verifying a unix command sent in Perl by friedo (Prior) on Jul 19, 2009 at 04:55 UTC
If you need to capture both STDOUT and STDERR, a more robust option is to use IPC::Open3, which will give you separate filehandles for each.	[reply]
Re: Checking and verifying a unix command sent in Perl by Bloodnok (Vicar) on Jul 19, 2009 at 15:23 UTC
Hmm, is it just me, or does the OP bear the hallmarks of an XY question ?? A user level that continues to overstate my experience :-))	[reply]
Re: Checking and verifying a unix command sent in Perl by leocharre (Priest) on Jul 20, 2009 at 13:18 UTC
You should be able to either look this up on google or read it in one of the perl books. Don't be discouraged if it takes a little longer to find what you need.	[reply]