108 lines
2.7 KiB
Text
108 lines
2.7 KiB
Text
# Copyright (C) 2022 Martin Matouš
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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DESCRIPTION="Manage the ld symlink"
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MAINTAINER="Martin Matouš <m@matous.dev>"
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VERSION="1.0.0"
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BIN_DIR="${EROOT%/}/usr/bin"
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find_targets() {
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local linker
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# get all ld.* files
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for linker in "${BIN_DIR}/"ld.*; do
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[[ -f ${linker} ]] && basename "${linker}"
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done
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}
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remove_symlink() {
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[[ ! -e "${BIN_DIR}/ld" ]] && return
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[[ -L "${BIN_DIR}/ld" ]] || die -q "${BIN_DIR}/ld is not a symlink!"
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rm -f "${BIN_DIR}/ld"
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}
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set_symlink() {
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local target="$1"
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if is_number "${target}"; then
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local -r targets=( $(find_targets) )
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[[ ${target} -ge 1 && ${target} -le ${#targets[@]} ]] \
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|| die -q "Number out of range: $1"
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target=${targets[target-1]}
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elif [[ ! "$target" == "ld."* ]]; then
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target="ld.$target"
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fi
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if [[ ! -L "${BIN_DIR}/${target}" ]]; then
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die -q "Target \"${1}\" (${BIN_DIR}/${target}) doesn't appear to be valid!"
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fi
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remove_symlink || die -q "Couldn't remove existing symlink"
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ln -s "${target}" "${BIN_DIR}/ld"
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}
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### show action ###
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describe_show() {
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echo "Show the current linker symlink"
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}
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do_show() {
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write_list_start "Current linker symlink:"
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if [[ -L "${BIN_DIR}/ld" ]]; then
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# "dereference" only 1 layer od symlinking, unlike readlink/canonicalize
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local -r linker=$(find "${BIN_DIR}/ld" -printf %l)
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write_kv_list_entry "${linker}" ""
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else
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write_kv_list_entry "(unset)" ""
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fi
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}
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### list action ###
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describe_list() {
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echo "List available linkers"
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}
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do_list() {
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local i
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local targets=( $(find_targets) )
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write_list_start "Available linker symlink targets:"
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for (( i = 0; i < ${#targets[@]}; i++ )); do
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[[ ${targets[i]} = $(find "${BIN_DIR}/ld" -printf %l) ]] \
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&& targets[i]=$(highlight_marker "${targets[i]}")
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done
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write_numbered_list -m "(none found)" "${targets[@]}"
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}
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### set action ###
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describe_set() {
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echo "Set a new linker symlink target"
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}
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describe_set_parameters() {
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echo "<target>"
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}
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describe_set_options() {
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echo "target : Target name or number (from 'list' action)"
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}
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do_set() {
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local -r linker="$1"
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[[ -z "$linker" ]] && die -q "You didn't tell me what to set the symlink to"
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[[ $# -gt 1 ]] && die -q "Too many parameters"
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set_symlink "$linker" || die -q "Couldn't set a new symlink"
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}
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