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MyASPN >> Mail Archive >> activeperl
activeperl
RE: system/backticks output not as expected
by Conor Lillis other posts by this author
Oct 30 2009 6:49AM messages near this date
Re: system/backticks output not as expected | Help with $_
I usually capture the output for backticks to an array rather than a
string so try

my @return=`$command`;
Foreach my $line(@output){print "$line\n"}

Regards,
Conor Lillis
--------------------------------------------- 
Senior Systems Administrator,
Group Network Services,
Phone +353-1-616-2540
 
Anglo Irish Bank
www.angloirishbank.ie
mailto:conorlillis@[...].ie
--------------------------------------------- 

-----Original Message-----
From: activeperl-bounces@[...].com
[mailto:activeperl-bounces@[...].com] On Behalf Of
Oeschey, Lars (I/ET-83, extern)
Sent: 30 October 2009 13:38
To: activeperl@[...].com
Subject: system/backticks output not as expected

Hi,

I have a problem getting the output of a system call. It's a simple
code:

my $return=`$command`;
print "$?\n";
print "result:$return\n";

(I am calling a command which actually doesn't exist, to check error
handling)

as result on the console I have:

Das System kann das angegebene Laufwerk nicht finden.
256
result:

The first error says it can't find the program. Actually I expected this
in $return.

compared to system():

my $return=system("$command");
print "$?\n";
print "result:$return\n";

Das System kann das angegebene Laufwerk nicht finden.
256
result:256

So obviously system() returns the error code. But why don't the
backticks return anything at all? Ideally I'd want all the output
catched to log, but still be able to react on errors...

Lars

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Thread:
Lars Oeschey
Brian Raven
Serguei Trouchelle
Conor Lillis

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