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#!/usr/bin/perl
# Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
# based on vps by Krischan Jodies
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Wrapper for ps. Adds security context number and name
# to the PID column.
#
# (c) 2002 krischan.jodies@sernet.de
# version 1.0
# 1.1 Added error messages
if ($ARGV[0] eq "--help") {
exec("ps @ARGV");
exit;
}
$lockdir = "/var/run/vservers";
$pid_length = 5;
get_server_names();
$context=get_context("self");
if ($context == -1) {
print "Can not find my security context. Is this a ctx kernel?\n";
exit;
}
if ($context != 1) {
exec("@PKGLIBDIR@/chcontext-compat --silent --ctx 1 $0 @ARGV");
print "Can not execute chcontext\n";
exit; # not reached
}
if (! open PS, "ps @ARGV|") {
print "Can not execute ps\n";
exit;
}
while (<PS>) {
chomp;
push @ps,$_;
}
$header = shift @ps;
$header =~ /(.*) PID(.+)/;
$left = $1;
$right = $2;
$left_length = length($left);
print "${left} PID CONTEXT ${right}\n";
foreach $line (@ps) {
$pid = substr $line,$left_length,$pid_length;
print substr $line,0,$left_length;
print "$pid";
$context = get_context($pid);
$context_name = getcontextname($context);
printf " %-3s %-10s",$context,$context_name;
print substr $line,$left_length + $pid_length;
print "\n";
}
exit;
sub get_context
{
my $pid = $_[0];
$pid =~ s/ //g;
open STATUS, "/proc/$pid/status";
while (<STATUS>)
{
chomp;
if (/s_context: (\d+)/) {
close STATUS;
return $1;
}
}
close STATUS;
return -1;
}
sub getcontextname {
if (exists $name{$_[0]}) {
return $name{$_[0]};
}
if ($_[0] == 1) {
return "ALL_PROCS";
}
elsif ($_[0] == 0) {
return "MAIN";
}
return "UNKNOWN";
}
sub get_server_names
{
opendir LOCKDIR, "$lockdir";
while ($file=readdir(LOCKDIR)) {
if (-f "$lockdir/$file") {
open FILE, "$lockdir/$file";
$file =~ s/(.+)\.ctx/$1/;
while (<FILE>) {
if (/S_CONTEXT=(\d+)/) {
$name{$1} = $file;
}
}
}
}
}
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