## various functions
function makeiso() {
	local ISO_FILE ISO_VOL_ID SOURCE USAGE
	USAGE="usage: makeiso ISO_FILE ISO_VOL_ID SOURCE [SOURCE2 SOURCE 3...]"
	if [ -z "$1" ]; then
		echo -e "${USAGE}"; return 1
	fi
	ISO_FILE="$1"
	ISO_VOL_ID="$2"
	shift 2
	SOURCE="$@"
	mkisofs -J -r -V "${ISO_VOL_ID}" -o "${ISO_FILE}" ${SOURCE}
}
function burniso() {
	local ISO_FILE CDRECORD_ARGS USAGE
	USAGE="usage: burniso ISO_FILE"
	if [ -z "$1" ]; then
		echo -e "${USAGE}"; return 1
	fi
	ISO_FILE="$1"
	CDRECORD_ARGS="-v dev=$CDR_DEVICE speed=$CDR_SPEED driveropts=burnfree -eject"
	sudo cdrecord ${CDRECORD_ARGS} -data "${ISO_FILE}"
}
function copycd() {
	local CD_DEV CDR_DEV CDR_SPEED CDRECORD_ARGS USAGE
	USAGE="usage: copycd CD_DEV CDR_DEV CDR_SPEED"
	if [ -z "$1" ]; then
		echo -e "${USAGE}"; return 1
	fi
	CD_DEV="$1"
	CDR_DEV_ID="$2"
	CDR_SPEED="$3"
	CDRECORD_ARGS="-v dev=$CDR_DEV_ID speed=$CDR_SPEED driveropts=burnfree -eject"
	cdrecord ${CDRECORD_ARGS} -isosize ${CD_DEV}
}
function ripcd() {
	while true; do
		echo "*** ripper:"
		echo "--- 1: cdda2wav"
		echo "--- 2: cdparanoia"
		echo "--- q: none, quit."
		echo -n "--- use: "
		read -en 1 use
		case "${use}" in
			1)
				exec sudo cdda2wav -O wav -H -B -P 0
				;;
			2)
				exec sudo cdparanoia -b -d /dev/cdrom
				;;
			q)
				echo "*** have a nice day. EOF"
				break
				;;
			*)
				echo "!!! wrong answer."
				;;
		esac
	done
}
function mrproper() {
	local DIR PATTERN USAGE
	USAGE="mrproper [DIR]"
	PATTERN="^.*/(.*(~|\.(bak|tmp|orig|rej|swp))|core|a\.out)$"
	if [ -z "$1" ]; then
		DIR="."
	else
		DIR="$1"
	fi
	echo -n "really clean directory \"$DIR\" RECURSIVELY?: "
	read yn
	if [ "$yn" = "y" ]; then
		find "$DIR" -type f | egrep "$PATTERN" | xargs -i rm -vf "{}"
	else
		echo -n "not "
	fi
	echo "cleaned."
}
function colors() {
	local T FGs FG BG
	T="gYw" # the test text
	echo -e "\n                 40m     41m     42m     43m     44m     45m     46m     47m"
	for FGs in \
		'    m' '   1m' '  30m' '1;30m' '  31m' '1;31m' '  32m' \
		'1;32m' '  33m' '1;33m' '  34m' '1;34m' '  35m' '1;35m' \
		'  36m' '1;36m' '  37m' '1;37m'; do
		FG=${FGs// /}
		echo -en " $FGs \033[$FG  $T  "
		for BG in 40m 41m 42m 43m 44m 45m 46m 47m; do
			echo -en " \033[$FG\033[$BG  $T  \033[0m"
		done
		echo
	done
	echo
}
function f() {
	local USAGE
	USAGE="usage: f [PATH] [INAME]\n\nINAME is a case insensitive name-pattern"
	find ${1:+ "$1"} ${2:+ \-iname "$2"} -print
}
function mkcd() {
	local USAGE
	USAGE="usage: mkcd DIRECTORY"
	if [ -z "$1" ]; then
		echo -e "$USAGE"; return 1
	fi
	mkdir -p "$1"; cd "$1"
}
function pfcp() {
	local USAGE
	USAGE="usage: pfcp SRC DST"
	if [ "$#" -lt 2 ]; then
		echo -e "$USAGE"; return 1
	fi
	src="$1"
	if [ ! -f "${src}" ]; then
		echo "ERROR: can only copy regular files"; return 1
	fi
	src_base="${src##*/}"
	dst="$2"
	if [ -d "${dst}" ]; then
		dst="${dst%*/}/${src_base}"
	fi
	pv -W -p -t -e -r -b -s $(du -sb "${src}" | awk '{ print $1 }') < "${src}" >"${dst}"
	# pipemeter -f "${src}" >"${dst}"
}
function prompt_elite {
	local C_GRAY="\[\033[1;30m\]"
	local C_LIGHT_GRAY="\[\033[0;37m\]"
	local C_CYAN="\[\033[0;36m\]"
	local C_LIGHT_CYAN="\[\033[1;36m\]"
	local C_NONE="\[\033[0m\]"
	case $TERM in
		xterm*|rxvt*)
			local TITLEBAR='\[\033]0;\u@\h:\w\007\]'
			;;
		*)
			local TITLEBAR=""
			;;
	esac
	local temp=$(tty)
	local GRAD1=${temp:5}
	PS1="$TITLEBAR$C_GRAY-$C_CYAN-$C_LIGHT_CYAN($C_CYAN\u$C_GRAY@$C_CYAN\h$C_LIGHT_CYAN)$C_CYAN-$C_LIGHT_CYAN($C_CYAN\#$C_GRAY/$C_CYAN$GRAD1$C_LIGHT_CYAN)$C_CYAN-$C_LIGHT_CYAN($C_CYAN\$(date +%H%M)$C_GRAY/$C_CYAN\$(date +%d-%b-%y)$C_LIGHT_CYAN)$C_CYAN-$GRAY-$C_LIGHT_GRAY\n$C_GRAY-$C_CYAN-$C_LIGHT_CYAN($C_CYAN\$$C_GRAY:$C_CYAN\w$C_LIGHT_CYAN)$C_CYAN-$C_GRAY-$C_LIGHT_GRAY "
	PS2="$LIGHT_CYAN-$CYAN-$GRAY-$C_NONE "
}
function remount() {
	/bin/mount -o remount ${1+"$@"};
}
function repeat() {
	local USAGE COUNT I
	USAGE="usage: repeat COUNT COMMAND"
	if [ -z "$1" ] || [ -z "$2" ]; then
		echo -e "$USAGE"; return 1
	fi
	COUNT="$1"
	shift
	for I in $(seq 1 "$COUNT"); do
		eval "$@"
	done
}
function rot13() {
	if [ $# = 0 ] ; then
		tr "[a-m][n-z][A-M][N-Z]" "[n-z][a-m][N-Z][A-M]"
	else
		tr "[a-m][n-z][A-M][N-Z]" "[n-z][a-m][N-Z][A-M]" < $1
	fi
}
## sizeof function for bash-arrays
function sizeof() {
	eval echo \${#$1[@]}
}
## returns short pwd (last two directories)
function spwd() {
	IFS="/"
	set $PWD
	if test $# -le 3 ; then
		echo "$PWD"
	else
		eval echo \"..\${$(($# - 1))}/\${$#}\"
	fi
}
## returns base pwd (last directory)
function bpwd() {
	echo "${PWD##*/}"
}
## shell seq replacement
function sseq() {
	local FIRST LAST INCREMENT CMP OP USAGE
	USAGE="usage: sseq LAST\n   or: sseq FIRST LAST\n   or: sseq FIRST INCREMENT LAST"
	case "$#" in
		1) LAST=$1 FIRST=1 INCREMENT=1;;
		2) LAST=$2 FIRST=$1 INCREMENT=1;;
		3) LAST=$3 FIRST=$1 INCREMENT=$2;;
		*) echo -e "$USAGE"; return 1;;
	esac
	if [ $FIRST -eq $LAST ]; then return
	elif [ $FIRST -lt $LAST ]; then CMP="le" OP="+"
	elif [ $FIRST -gt $LAST ]; then CMP="ge" OP="-"
	fi
	while [ $FIRST -$CMP $LAST ]; do
		echo "$FIRST"
		FIRST=$(($FIRST $OP $INCREMENT))
	done
}
## ssh-copy-id clone
test -x "$(type -p ssh-copy-id)" || {
	function ssh-copy-id() {
		local USAGE DST_HOST DST_AUTHKEYS SRC_PUBKEY
		USAGE="usage: ssh-copy-id [USER@]HOST"
		if [ -z "$1" ]; then
			echo -e "$USAGE"; return 1
		fi
		DST_HOST="$1"
		shift
		SSH_PARAMS="$@"
		DST_SSHDIR="~/.ssh"
		DST_SSHAUTHKEYS="${DST_SSHDIR}/authorized_keys2"
		SRC_SSHPUBKEY="$HOME/.ssh/id_dsa.pub"
		ssh $DST_HOST $SSH_PARAMS "test -d ${DST_SSHDIR} || mkdir -p ${DST_SSHDIR}; cat >>$DST_SSHAUTHKEYS" <"$SRC_SSHPUBKEY" && {
			echo "public key $SRC_SSHPUBKEY copied successfully to $DST_HOST:$DST_SSHAUTHKEYS."
		}
	}
}
function swatch() {
	local USAGE FILE
	USAGE="usage: swatch INTERVAL COMMAND"
	if [ -z "${1}" ] || [ -z "${2}" ]; then
		echo -e "${USAGE}"; return 1
	fi
	while true; do
		clear
		echo -e "Every ${1}s: ${2}\t[$(date)]"
		eval ${2}
		sleep ${1}
	done
}
function now() {
	local USAGE DELIMITER FMT
	USAGE="usage: now ELEMENT [DELIMITER]\n\nELEMENT can be date [d] or time [t]"
	DELIMITER=""; test -n "$2" && DELIMITER="$2"
	case "$1" in
		date|d) FMT="%Y$DELIMITER%m$DELIMITER%d";;
		time|t) FMT="%H$DELIMITER%M$DELIMITER%S";;
		*) echo -e "$USAGE"; return 1
	esac
	date +$FMT
}
function untar() {
	local USAGE FILE
	USAGE="usage: untar FILE [FILE 2] ... [FILE n]"
	if [ -z "$1" ]; then
		echo -e "$USAGE"; return 1
	fi
	for FILE in $*; do
		tar xvf $FILE
	done
}
function untbz2() {
	local USAGE FILE
	USAGE="usage: untbz2 FILE [FILE 2] ... [FILE n]"
	if [ -z "$1" ]; then
		echo -e "$USAGE"; return 1
	fi
	for FILE in $*; do
		tar xjvf $FILE
	done
}
function untgz() {
	local USAGE FILE
	USAGE="usage: untgz FILE [FILE 2] ... [FILE n]"
	if [ -z "$1" ]; then
		echo -e "$USAGE"; return 1
	fi
	for FILE in $*; do
		tar xzvf $FILE
	done
}