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Full Discussion: Trouble executing piped shell commands in perl code
Top Forums Shell Programming and Scripting Trouble executing piped shell commands in perl code Post 302629071 by asterisk-ix_use on Tuesday 24th of April 2012 09:22:48 AM
Old 04-24-2012
Just like shell, perl also uses the positional parameters $1,$2 etc. So, when you are using $9 in the awk command syntax, perl interprets $9 as one of the other variables in the perl script. Hence the error.

If you still want to use awk command, escape the $ sign like below:

Code:
 
#!/usr/bin/perl
use strict;
my $count=0;
my @list=`ls -l|awk '{print \$9}'`;
print "@list";

 

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LEARN ABOUT DEBIAN

funnel

funnel(1)							     logtools								 funnel(1)

NAME

       funnel - split one pipe stream to one or more files or programs

SYNOPSIS

       funnel [|] [>[>]file] [|process]

DESCRIPTION

       The funnel program will read data from standard input and write it to several output streams.

       The | symbol means to copy standard input to standard output.

       The > symbol means that a file name immediately follows with no separating spaces, the file will be truncated if it exists or created if it
       doesn't. The >> means that the file is to be appended to if it exists.

       A | symbol followed immediately by text indicates a command that is to be run by system() and will have all input piped to it.

EXIT STATUS

       0 No errors

       1 Error opening input

       Other errors are 100 + number of commands or files that fail

AUTHOR

       This program, its manual page, and the Debian package were written by Russell Coker <russell@coker.com.au>.

FEATURES

       Uses popen (3) for output so that shell expansion gets performed.  If you want such shell expansion then you must ensure that you quote the
       parameters correctly so that they get expanded by popen (3) not the shell that calls funnel.

SEE ALSO

       popen(3)

Russell Coker <;russell@coker.com.au>				       0.06								 funnel(1)
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