#!/bin/bash
#
# /usr/local/sbin/showlog
# Copyright 2002 Jonas Smedegaard <dr@jones.dk>
#
# $Id: showlog,v 1.5 2002-03-14 14:40:57 jonas Exp $
#
# Show topic-specific log entries
#

# halt on errors (NB! this is a bashism...)
set -e

function usage()	{
	echo "Usage: $(basename $0) ftp|web|weberror|websuexec|mail|system [<keyword> [<keyword>...]]"
	exit 1
}

function exit1()	{
	echo "Error: $1"
	echo "Exiting..."
	exit 1
}

tail_history="50"

target=$1
logroot="/var/log"
case "$target" in
    ftp)
	log="xferlog"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    web)
	logroot="/var/log/apache"
	log="access.log"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    weberror|weberrors)
	logroot="/var/log/apache"
	log="error.log"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    websuexec)
	logroot="/var/log/apache"
	log="suexec.log"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    mail)
	log="mail.log"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    system)
	log="syslog"
	logs="$log.??.gz $log.?.gz $log.? $log"
	;;
    *)
	usage
	;;
esac
shift

function cat_logs()	{
	logroot=$1
	shift
	for pattern in $@; do
		for file in `find $logroot -name "$pattern" -type f -mindepth 1 -maxdepth 1 -follow | sort`; do
			case $pattern in
			    *.gz)
				zcat $file;;
			    *.bz2)
				bzcat $file;;
			    *)
				cat $file;;
			esac
		done
	done
}

if [ $# \> 0 ]; then
	grep_opts=""
	for keyword in $@; do
		grep_opts="$opts -e $keyword"
	done
	cat_logs $logroot $logs | grep -i $grep_opts | tail -n $tail_history
	[ -f $logroot/$log ] && tail -n 0 -f $logroot/$log | grep -i $grep_opts
else
	cat_logs $logroot $logs | tail -n $tail_history
	[ -f $logroot/$log ] && tail -n 0 -f $logroot/$log
fi