vnc eselect module. usage is obvious enough

vnc.eselect (text/plain), 2.51 KB, created by Thomas Zwaagstra on 2010-12-30 00:27:16 UTC

# -*-eselect-*-  vim: ft=eselect
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

DESCRIPTION="Manage the VNC provider"
MAINTAINER="Tom"
VERSION="0.1"

symlink_creator() {
	local target=${1}
	if is_number "${target}" ; then
		local targets=( $(find_targets) )
		target="${targets[target - 1]}${3}"
	fi

	echo "target: ${target}"

	if [[ -z ${1} ]] ; then
		# no parameter
		die -q "You didn't tell me what VNC provider to symlink"
	elif [[ -L ${EROOT}${2} ]] ; then
		# existing symlink
		if ! remove_symlink ${2}; then
			die -q "Couldn't remove existing symlink"
		elif ! set_symlink "${1}" "${2}"; then
			die -q "Couldn't set a new symlink"
		fi
	elif [[ -e "${EROOT}${2}" ]] ; then
		# we have something strange
		die -q "${EROOT}${2} exists but is not a symlink"
	else
		set_symlink "${1}" "${2}" || die -q "Couldn't set a new symlink"
	fi
}

# find a list of VNC providers
find_targets() {
	local f
	for f in "${EROOT}"/usr/bin/*vncviewer ; do
		if [[ ! -L ${f} ]]; then
			basename "${f}" | sed 's/vncviewer$//'
		fi
	done
}

# try to remove the kernel symlink
remove_symlink() {
	rm "${EROOT}${1}"
	#echo "${EROOT}${1}"
}

# set the kernel symlink
set_symlink() {

	if [[ -z ${target} ]] ; then
		die -q "Target \"${1}\" doesn't appear to be valid!"
	elif [[ -e ${EROOT}/usr/bin/${target} ]] ; then
		ln -s "${target}" "${2}"
	fi
}

### show action ###

describe_show() {
	echo "Show the current VNC provider"
}

do_show() {
	write_list_start "Current VNC provider:"
	if [[ -L ${EROOT}/usr/bin/vncviewer ]] ; then
		local kernel=$(canonicalise "${EROOT}/usr/bin/vncviewer")
		write_kv_list_entry "${kernel%/}" ""
	else
		write_kv_list_entry "(unset)" ""
	fi
}

### list action ###

describe_list() {
	echo "List available VNC providers"
}

do_list() {
	local i targets=( $(find_targets) )
	write_list_start "Available VNC providers:"
	for (( i = 0; i < ${#targets[@]}; i++ )) ; do
		[[ ${targets[i]} = \
			$(basename "$(canonicalise "${EROOT}/usr/src/linux")") ]] \
			&& targets[i]=$(highlight_marker "${targets[i]}")
	done
	write_numbered_list -m "(none found)" "${targets[@]}"
}

### set action ###

describe_set() {
	echo "Set the VNC provider"
}

describe_set_parameters() {
	echo "<target>"
}

describe_set_options() {
	echo "target : Target name or number (from 'list' action)"
}

do_set() {

	for command in "vncviewer" "vncconfig" "vncserver" "x0vncserver" "vncpasswd" "Xvnc"; do
		#if [[ -e "${vncprefix}" ]]; then
			symlink_creator "${1}" "/usr/bin/${command}" ${command}
		#fi
	done
}