Perl Exception - $!,$?,$@ Post: 302229436

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Top Forums Shell Programming and Scripting Perl Exception - $!,$?,$@ Post 302229436 by DILEEP410 on Wednesday 27th of August 2008 03:23:52 AM

08-27-2008

Registered User

Quote:

Originally Posted by otheus

man perlvar will help you.

$@ is the error message from the last eval(). Period. It's null if there was no eval.

$! is what went wrong after the last call to the OS -- it's essentially from errno. It gets reset as soon as you do something that succeeds, like the statement "1;".

$? Is only after an external command, pipeline, system(), or wait(), it contains the error the last command returned, shifted left 8 bits.

About the error message, it could be Net::FTP is printing out to stderr. You can instantiate the object with a Debug parameter...

new Net::FTP( $hostname, ( 'Debug'=> 10 ));

Thank you for your response.I understand about the variable difference.But am just wondering what is Debug code "10".My understanding is that a non-zero debug code will print each and every internal process to STDOUT.So how this will help to solve my problem.ie,Throwing error to STDOUT or STDERR

Regards
Dileep

DILEEP410

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