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Viewing file:     conmen (5.32 KB)      -rwxr-xr-x

#!/usr/bin/env perl

#******************************************************************************
# ConMen: a wrapper to aid in ConMan broadcast sessions.
#******************************************************************************
# $Id: conmen 500 2005-02-10 02:19:46Z dun $
#******************************************************************************
# Copyright (C) 2001-2002 The Regents of the University of California.
# Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
# Written by Chris Dunlap <cdunlap@llnl.gov>.
# UCRL-CODE-2002-009.
# 
# This file is part of ConMan, a remote console management program.
# For details, see <http://www.llnl.gov/linux/conman/>.
# 
# ConMan 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 of the License, or (at your option)
# any later version.
# 
# ConMan 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 ConMan; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
#******************************************************************************
# ConMen spawns an xterm for each of the selected consoles
#   and uses the current tty as the broadcast window.
# All of the spawned xterm clients are terminated when the
#   broadcast window session is closed.
#******************************************************************************

use Getopt::Std;


$SIG{TERM} = exit_handler;

$ENV{PATH} = "/usr/bin:/usr/local/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/X/bin";

$ENV{DISPLAY}
    or die("ERROR: DISPLAY not set.\n");
!system("which conman 1>/dev/null 2>&1")
    or die("ERROR: conman not found in PATH.\n");
!system("which xterm 1>/dev/null 2>&1")
    or die("ERROR: xterm not found in PATH.\n");

$help = `conman -h`;
($def_dst) = ($help =~ /-d .* \[([^\]]*)\]/);
($def_esc) = ($help =~ /-e .* \[([^\]]*)\]/);

print_usage() if (!@ARGV || !getopts('d:e:fg:hjLmqrV') || $opt_h);
@patterns = @ARGV;
exec("conman", "-L") or die("ERROR: Cannot exec conman: $!\n") if ($opt_L);
exec("conman", "-V") or die("ERROR: Cannot exec conman: $!\n") if ($opt_V);

($opt_f + $opt_j + $opt_m <= 1)
    or die("ERROR: Only one mode [fjm] can be specified.\n");

if ($opt_f) {
    $mode = "-f";
} elsif ($opt_j) {
    $mode = "-j";
} elsif ($opt_m) {
    $mode = "-m";
} else {
    $mode = "-m";
}

@conman = ("conman", "-Q");
push(@conman, ("-d", $opt_d)) if ($opt_d);
push(@conman, ("-e", $opt_e)) if ($opt_e);
push(@conman, ("-r")) if ($opt_r);

@xterm = ("xterm");
push(@xterm, ("-geometry", $opt_g)) if ($opt_g);

query_consoles();
spawn_consoles();
exit_handler();
kill(-9, $$);
exit(0);


sub exit_handler
{
    kill('TERM', @pids);
    select(undef, undef, undef, 0.5);
    kill('KILL', @pids);
    exit(0);
}


sub print_usage
{
    ($prog) = ($0 =~ m|(?:.*/)?([^/]*)|);
    print("Usage: $prog [OPTIONS] [CONSOLES]\n");
    print("\n");
    print("  -d HOST   Specify server destination. [$def_dst]\n");
    print("  -e CHAR   Specify escape character. [$def_esc]\n");
    print("  -f        Force connections (console-stealing).\n");
    print("  -g SIZE   Specify xterm's geometry (eg, 80x24).\n");
    print("  -h        Display this help.\n");
    print("  -j        Join connections (console-sharing).\n");
    print("  -L        Display license information.\n");
    print("  -m        Monitor connections (read-only).\n");
    print("  -q        Query server about specified console(s).\n");
    print("  -r        Match console names via regex instead of globbing.\n");
    print("  -V        Display version information.\n");
    print("\n");
    exit(0);
}


sub query_consoles
{
    die("ERROR: Cannot fork query: $!\n")
        unless defined($pid = open(QUERY, "-|"));
    if ($pid == 0) {
        exec(@conman, "-q", @patterns)
            or die("ERROR: Cannot exec query: $!\n");
    } else {
        chomp(@consoles = <QUERY>);
        close(QUERY);
    }
    if ($opt_q) {
        foreach (@consoles) { print("$_\n"); }
        exit(0);
    }
    if (@consoles == 0) {
        exit(1);
    } elsif (@consoles == 1) {
        exec(@conman, $mode, $consoles[0])
            or die("ERROR: Cannot exec conman for console $consoles[0]: $!\n");
    }
}


sub spawn_consoles
{
    foreach $console (@consoles) {
        $name = "ConMan: $console";
        if (!defined($pid = fork)) {
            die("ERROR: Cannot fork xterm for console $console: $!\n");
        } elsif ($pid == 0) {
            local $SIG{TERM} = 'DEFAULT';
            exec(@xterm, "-T", $name, "-e", @conman, $mode, $console)
                or die("ERROR: Cannot exec xterm for console $console: $!\n");
        } else {
            push(@pids, $pid);
        }
        select(undef, undef, undef, 0.2);
    }
    select(undef, undef, undef, 1.0);

    if (!defined($pid = fork)) {
        die("ERROR: Cannot fork xterm for console broadcast: $!\n");
    } elsif ($pid == 0) {
        exec(@conman, "-b", "-j", @patterns)
            or die("ERROR: Cannot exec xterm for console broadcast: $!\n");
    } else {
        waitpid($pid, 0);
    }
}