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|
package Lxctl::pid;
use strict;
use warnings;
my %options = ();
sub get_proc_name
{
my ($self, $pid) = @_;
open(my $file, '<', "/proc/$pid/comm")
or die "Failed to open /proc/$pid/comm.\n\n";
my $line = <$file>;
chomp $line;
return $line;
}
sub get_proc_container
{
my ($self, $pid) = @_;
open(my $file, '<', "/proc/$pid/cgroup")
or die "Failed to open /proc/$pid/cgroup.\n\n";
my $line = <$file>;
$line =~ s/^\S+:\S+:\/(\S*)$/$1/;
chomp $line;
$line = "dom0 process" if $line eq "";
return $line;
}
sub get_longest_string
{
my ($self, @arr) = @_;
my @tmp = sort { length($b) <=> length($a) } @arr;
return length($tmp[0]);
}
sub do
{
my $self = shift;
my $pidlist = shift
or die "What pid[s] should I check?\n\n";
my @pids = ('PID');
my @names = ('NAME');
my @cts = ('CT_NAME');
my @tmp_pids = split(/,/, $pidlist);
for my $pid (@tmp_pids) {
$pid =~ m/^\d+$/
or die "$pid - that's not a pid. No-no-no-no, don't try to fool me.\n\n";
push(@pids, $pid);
push(@names, $self->get_proc_name($pid));
push(@cts, $self->get_proc_container($pid));
}
my $max_pids = $self->get_longest_string(@pids);
my $max_names = $self->get_longest_string(@names);
my $max_cts = $self->get_longest_string(@cts);
for (my $i=0; $i < scalar(@pids); $i++) {
printf " %".$max_pids."s %".$max_names."s %".$max_cts."s\n", $pids[$i], $names[$i], $cts[$i];
}
return;
}
sub new
{
my $class = shift;
my $self = {};
bless $self, $class;
return $self;
}
1;
__END__
=head1 AUTHOR
Anatoly Burtsev, E<lt>anatolyburtsev@yandex.ruE<gt>
Pavel Potapenkov, E<lt>ppotapenkov@gmail.comE<gt>
Vladimir Smirnov, E<lt>civil.over@gmail.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2011 by Anatoly Burtsev, Pavel Potapenkov, Vladimir Smirnov
This library is free software; you can redistribute it and/or modify
it under the same terms of GPL v2 or later, or, at your opinion
under terms of artistic license.
=cut
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