#!/bin/sh
#
# /usr/local/sbin/showlog
# Copyright 2002-2006 Jonas Smedegaard <dr@jones.dk>
#
# $Id: showlog,v 1.12 2007-10-23 21:14:51 jonas Exp $
#
# Show topic-specific log entries
#

set -e

logfilecount="${logfilecount:-1}"

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

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

cat_logs()	{
	rootdir="$1"
	pattern="$2"
	howmany="${3:-2}"

	if [ "$howmany" != "all" ]; then
		files="$(find $rootdir -mindepth 1 -maxdepth 1 -regextype posix-egrep -regex "$pattern" -type f -follow | sort -nr | tail -n "$howmany")"
	else
		files="$(find $rootdir -mindepth 1 -maxdepth 1 -regextype posix-egrep -regex "$pattern" -type f -follow | sort -nr)"
	fi
	for file in $files; do
		case $file in
		    *.gz)
			zcat $file;;
		    *.bz2)
			bzcat $file;;
		    *)
			cat $file;;
		esac
	done
}

tail_history="${tail_history:-500}"

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

case "$target" in
    ftp)
	log="xferlog"
	;;
    web)
	logroot="/var/log/apache"
	log="access.log"
	;;
    weberror|weberrors)
	logroot="/var/log/apache"
	log="error.log"
	;;
    websuexec)
	logroot="/var/log/apache"
	log="suexec.log"
	;;
    mail)
	log="mail.log"
	;;
    sms|smsbox)
	log="smsbox.log"
	;;
    bearerbox)
	log="bearerbox.log"
	;;
    system)
	log="syslog"
	;;
    *)
	usage
	;;
esac
case "$target" in
    ftp|mail|system)
	logroot="/var/log"
	;;
    web|weberror|weberrors|websuexec)
	logroot="/var/log/apache"
	;;
    sms|smsbox|bearerbox)
	logroot="/var/log/kannel"
	;;
    *)
	usage
	exit1 "Undefined logroot for \"$target\""
	;;
esac
case "$target" in
    ftp|web|weberror|weberrors|websuexec|mail|sms|smsbox|bearerbox|system)
	logpattern="$(printf '.*/%s(\.[[:digit:]]+(\.gz)?)?\n' "$log")"
	;;
    *)
	exit1 "Undefined logpattern for \"$target\""
	;;
esac

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