#!/usr/local/bin/perl
##
## Amazingly hacked version of Hank's rancid - this one tries to
## deal with Junipers.
##
## Original Rancid: Copyright (C) 1997 by Henry Kilmer.
## All rights reserved.
##
## This software may be freely copied, modified and redistributed without
## fee for non-commerical purposes provided that this copyright notice is
## preserved intact on all copies and modified copies.
##
## There is no warranty or other guarantee of fitness of this software.
## It is provided solely "as is". The author(s) disclaim(s) all
## responsibility and liability with respect to this software's usage
## or its effect upon hardware, computer systems, other software, or
## anything else.
##
##
#
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: jrancid [-d] [-l] [-f filename | $host]
#
use Getopt::Std;
getopts('dfl');
$debug = $opt_d;
$log = $opt_l;
$file = $opt_f;
$host = $ARGV[0];

$clean_run = 0;

# This routine is used to print out the router configuration
sub ProcessHistory {
    my($new_hist_tag,$new_command,$command_string,@string)=(@_);
    if((($new_hist_tag ne $hist_tag) || ($new_command ne $command))
       && defined %history) {
	print eval "$command \%history";
	undef %history;
    }
    if (($new_hist_tag) && ($new_command) && ($command_string)) {
	if ($history{$command_string}) {
	    $history{$command_string} = "$history{$command_string}@string";
	} else {
	    $history{$command_string} = "@string";
	}
    } elsif (($new_hist_tag) && ($new_command)) {
	$history{++$#history} = "@string";
    } else {
	print "@string";
    }
    $hist_tag = $new_hist_tag;
    $command = $new_command;
    1;
}

sub numerically { $a <=> $b; }

# This is a sort routing that will sort numerically on the
# keys of a hash as if it were a normal array.
sub keynsort {
    local(%lines)=@_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort numerically keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routing that will sort on the
# keys of a hash as if it were a normal array.
sub keysort {
    local(%lines)=@_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routing that will sort on the
# values of a hash as if it were a normal array.
sub valsort{
    local(%lines)=@_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort values %lines) {
        $sorted_lines[$i] = $key;
        $i++;
    }
    @sorted_lines;
}

# This is a numerical sort routing (ascending).
sub numsort {
    local(%lines)=@_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $num (sort {$a <=> $b} keys %lines) {
	$sorted_lines[$i] = $lines{$num};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routine that will sort on the
# ip address when the ip address is anywhere in
# the strings.
sub ipsort {
    local(%lines)=@_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $addr (sort sortbyipaddr keys %lines) {
	$sorted_lines[$i] = $lines{$addr};
	$i++;
    }
    @sorted_lines;
}

# These two routines will sort based upon IP addresses
sub ipaddrval {
    my(@a) = ($_[0] =~ m#^(\d+)\.(\d+)\.(\d+)\.(\d+)$#);
    $a[3]+256*($a[2]+256*($a[1]+256*$a[0]));
}
sub sortbyipaddr {
    &ipaddrval($a) <=> &ipaddrval($b);
}

###
### Start of real work
###

# This routine parses "show chassis clocks"
sub ShowChassisClocks {
    print STDERR "    In ShowChassisClocks: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis environment"
sub ShowChassisEnvironment {
    print STDERR "    In ShowChassisEnvironment: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    /Couldn\'t initiate connection/ && return;
    / backplane temperature/ && return;
    /(\s*Power supply.*), temperature/ && ProcessHistory("","","","# $1\n") && return;
    /(\s*.+) +\d+ degrees C.*$/ && ProcessHistory("","","","# $1\n") && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis firmware"
sub ShowChassisFirmware {
    print STDERR "    In ShowChassisFirmware: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis fpc detail"
sub ShowChassisFpcDetail {
    print STDERR "    In ShowChassisFpcDetail: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    / Temperature:/ && return;
    / Start time:/ && return;
    / Uptime:/ && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis hardware"
sub ShowChassisHardware {
    print STDERR "    In ShowChassisHardware: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis routing-engine"
sub ShowChassisRoutingEngine {
    print STDERR "    In ShowChassisRoutingEngine: $_" if ($debug);
    /^Routing Engine status:/ && ProcessHistory("","","","# $_") && return;
    / DRAM:/ && ProcessHistory("","","","# $_") && return;
    /^\s*$/ && ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show chassis scb"
sub ShowChassisSCB {
    print STDERR "    In ShowChassisSCB: $_" if ($debug);
    /error: the chassis subsystem is not running/ && return;
    / Temperature:/ && return;
    / utilization:/ && return;
    /time:/ && return;
    / (IP|MLPS) routes:/ && return;
    / used:/ && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show version"
sub ShowVersion {
    print STDERR "    In ShowVersionAndBlame: $_" if ($debug);
    /^Juniper Networks is:/ && ProcessHistory("","","","\n$_") && return;
    ProcessHistory("","","","# $_") && return;
    return;
}

# This routine parses "show configuration"
sub ShowConfiguration {
    print STDERR "    In ShowConfiguration: $_" if ($debug);
    /^database header mismatch: / && return(-1);
    s/(\s*authentication-key ).*$/#$1<removed>;/;
    ProcessHistory("","","","$_") && return;
    return;
}

###
### End of real work
###

# dummy function
sub DoNothing {print STDOUT;}

# Main subroutine that splits up the work
# All Subs return the name of the next function to use.
# If the sub returns a new funtion name, that name will be used
# else the main loop keeps using the current function
sub FlailHelplessly {
    print STDERR "Flailing: $_" if ($debug);
    print STDOUT "Flailing: $_" if ($log);
    /(show chassis clocks)/ && delete($commands{$1}) && return("ShowChassisClocks");
    /(show chassis environment)/ && delete($commands{$1}) && return("ShowChassisEnvironment");
    /(show chassis firmware)/ && delete($commands{$1}) && return("ShowChassisFirmware");
    /(show chassis fpc detail)/ && delete($commands{$1}) && return("ShowChassisFpcDetail");
    /(show chassis hardware)/ && delete($commands{$1}) && return("ShowChassisHardware");
    /(show chassis routing-engine)/ && delete($commands{$1}) && return("ShowChassisRoutingEngine");
    /(show chassis scb)/ && delete($commands{$1}) && return("ShowChassisSCB");
    /(show version)/ && delete($commands{$1}) && return("ShowVersion");
    /(show configuration)/ && delete($commands{$1}) && return("ShowConfiguration");
    return "FlailHelplessly";
}

# Main
@commands=("show chassis clocks", "show chassis environment",
	   "show chassis firmware", "show chassis fpc detail",
	   "show chassis hardware", "show chassis routing-engine",
	   "show chassis scb", "show version", "show configuration");

foreach $c (@commands) { $commands{$c} = 1; }
$jnx_commands=join(";",@commands);
$cmds_regexp=join("|",@commands);
$func = FlailHelplessly;

open(OUTPUT,">$host.new") || die "Can't open $host.new for writing: $!\n";
# make OUTPUT unbuffered
select(OUTPUT); $| = 1;

if ($file) {
    print STDERR "opening file $host\n" if ($debug);
    print STDOUT "opening file $host\n" if ($log);
    open(INPUT,"< $host") || die "open failed for $host: $!\n";
} else {
    print(STDERR "executing echo jlogin -c\"$jnx_commands\" $host\n") if ($debug);
    print(STDOUT "executing echo jlogin -c\"$jnx_commands\" $host\n") if ($debug);
    open(INPUT,"jlogin -c\"$jnx_commands\" $host </dev/null |") ||
					die "jlogin failed for $host: $!\n";
}
while(<INPUT>) {
    tr/\015//d;
    if (/quit/) {
	delete($commands{"quit"});
	$clean_run=1;
	last;
    }
    if (/^Error:/) {
	print STDOUT ("$host jlogin error: $_");
	print STDERR ("$host jlogin error: $_") if ($debug);
	$clean_run=0;
	last;
    }
    if (/System shutdown message/) {
	print STDOUT ("$host shutdown msg: $_");
	print STDERR ("$host shutdown msg: $_") if ($debug);
	$clean_run = 0;
	last;
    }
    if (/($cmds_regexp)/) {
	ProcessHistory("","","","# $host> $1\n");
	$func = FlailHelplessly;
	print STDERR ("HIT COMMAND:$_") if ($debug);
    } else {
        $rval=eval $func;
	if ($rval == -1) {
	    $clean_run = 0;
	    last;
	} 
	$func=$rval if ($rval);
    }
}
print STDOUT "Done jlogin: $_\n" if ($log);
# Flush History
ProcessHistory("","","","");
# Cleanup
close(INPUT);
close(OUTPUT);

# check for completeness
$commands = join(", ", keys(%commands));
if (scalar(%commands) || !$clean_run) {
    if (scalar(%commands)) {
	print STDOUT "missed cmd(s): $commands\n";
	print STDERR "missed cmd(s): $commands[0]\n" if ($debug);
    }
    if (!$clean_run) {
	print STDOUT "End of run not found - removing $host.new\n";
	print STDERR "End of run not found - removing $host.new\n" if ($debug);
	system("/usr/bin/tail -1 $host.new");
    }
    unlink "$host.new";
}