# ############################################################################
# Returns the N'th argument in a b c ...
# Use:
#       arg N a b c d e
# More typically:
#	arg 3 "$@"
arg() {
    shift $1
    echo "$1"
}

# ############################################################################
#
# Returns path to a command, or "".
#
# Example:
#	If we have VNC server on this host, start one in the background:
#	VNCSERVER=`findcommand vncserver`
#	test "$VNCSERVER" != "" && vncserver ...
#
findcommand() {
    type "$1" 2>/dev/null | awk '$2 != "not" {print $NF}'
}

# ############################################################################
#
# Sets status to 0/1 if value is true/false.
#
# Example:
#	echo -n "Proceed (y/n)? "
#	read ans
#	if [ testbool "$ans" ] ; then
#		...
#	fi
#
testbool() {
    case "$1" in
    [Yy][Ee][Ss] | [Yy] | 1 | [Oo][Nn] | [Tt] | [Tt][Rr][Uu][Ee] ) true ;;
    * ) false ;;
    esac
}

# ############################################################################
#
# Joins all args with colons and returns same.
#
# This is helpful when you want to construct a long path in a manner
# that is easy to read and edit.
#
# Example:
#	path="a b c d ...
#		e f g h ...
#		x y z"
#	path=`colonjoin $path`
#
colonjoin() {
    path="$1"
    shift
    for p in "$@" ; do path=${path}:$p ; done
    echo $path
}

# ############################################################################