Hi, ShipWreck

Here are Perl snippets resembling awk and grep. The open statement emits a warning to the terminal if the command doesn't exist. Thus the reason simply exiting with status 127 matching the status in shell.

Shell

$ ps -ef | awk '{ print $1,$2,$8 }' | grep '^kdfadm '
$ ps -ef | awk '{ if ($1 == "kdfadm") print $1,$2,$8 }'

[download]

Perl (no delays, fast like awk)

use strict;
use warnings;

$, = ' ';   # set output field separator
$\ = "\n";  # set output record separator

open my $cmd, 'ps -ef |' or exit(127);
while (<$cmd>) {
    my ($f1,$f2,undef,undef,undef,undef,undef,$f8) = split(' ',$_,-1);
    print $f1,$f2,$f8 if ($f1 eq 'kdfadm');
}
close $cmd;

[download]

Perl using Proc::ProcessTable (suggestion by haukex and 1nickt)

use strict;
use warnings;
use Proc::ProcessTable;

$, = ' ';   # set output field separator
$\ = "\n";  # set output record separator

my $t = Proc::ProcessTable->new();
my $uid = getpwnam('kdfadm');

foreach my $p (@{ $t->table }) {
    print @{ $p }{qw( uid pid cmndline )} if ($p->uid == $uid);
}

[download]

Regards, Mario

In reply to Re: How to awk a grep result in-script by marioroy
in thread How to awk a grep result in-script by ShipWreck

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