#!/bin/bash
#
# /usr/local/sbin/showlog
# Copyright 2002 Jonas Smedegaard <dr@jones.dk>
#
# $Id: showlog,v 1.6 2006-07-28 12:45:07 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
}

function cat_logs()	{
	rootdir=$1
	shift
	patterns=$@

	for pattern in $patterns; do
		for file in `find $rootdir -name "$pattern" -type f -mindepth 1 -maxdepth 1 -follow | sort`; do
			case $pattern in
			    *.gz)
				zcat $file;;
			    *.bz2)
				bzcat $file;;
			    *)
				cat $file;;
			esac
		done
	done
}

tail_history="50"

target=$1
shift || exit1 "Missing argument"

case "$target" in
    ftp)
	log="xferlog"
	;;
    web)
	logroot="/var/log/apache"
	log="access.log"
	;;
    weberror|weberrors)
	logroot="/var/log/apache"
	log="error.log"
	;;
    websuexec)
	logroot="/var/log/apache"
	log="suexec.log"
	;;
    mail)
	log="mail.log"
	;;
    system)
	log="syslog"
	;;
    *)
	usage
	;;
esac
case "$target" in
    ftp|mail|system)
	logroot="/var/log"
	;;
    web|weberror|weberrors|websuexec)
	logroot="/var/log/apache"
	;;
    *)
	usage
	exit1 "Undefined logroot for \"$target\""
	;;
esac
case "$target" in
    ftp|web|weberror|weberrors|websuexec|mail|system)
	logpatterns="$log.? $log"
#	logpatterns="$log.??.gz $log.?.gz $log.? $log"
	;;
    *)
	exit1 "Undefined logpattern for \"$target\""
	;;
esac

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