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#!/bin/sh -efu |
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### This file is covered by the GNU General Public License |
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### version 2 or later. |
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### |
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### Copyright (C) 2019 ALT Linux Team |
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### Author: Leonid Krivoshein <klark@altlinux.org> |
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|
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numbers_only=0 |
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titles_only=0 |
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search_item= |
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progname="${0##*/}" |
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grubmenu="/boot/grub/grub.cfg" |
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|
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|
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show_help() { |
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cat <<-EOF |
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$progname - Show default or specified grub menu. |
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|
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Usage: $progname [options] |
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|
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Options: |
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-f, --config= Specify path to the grub config. |
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-n, --numbers Show only menu item sequence numbers. |
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-t, --titles Show only menu item names. |
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-c, --check= Specify menu item to validate. |
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-V, --version Show script version and exit. |
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-h, --help Show this help message and exit. |
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EOF |
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exit 0 |
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} |
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|
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show_version() { |
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cat <<-EOF |
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$progname version 1.0 |
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Copyright (C) 2019, ALT Linux Team |
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EOF |
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exit 0 |
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} |
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show_usage() { |
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[ -z "$*" ] || echo "$*" >&2 |
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echo "Try '$progname --help' for more information." >&2 |
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exit 1 |
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} |
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|
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parse_args() { |
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local opts="+f:,n,t,c:,V,h" |
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local longopts="config:,numbers,titles,check:,version,help" |
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|
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opts=$(getopt -n "$progname" -o "$opts" -l "$longopts" -- "$@") || |
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show_usage "Invalid command-line arguments." |
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eval set -- "$opts" |
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while [ $# -gt 0 ]; do |
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case "$1" in |
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-f|--config) shift; grubmenu="$1";; |
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-n|--numbers) numbers_only=1; titles_only=0;; |
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-t|--titles) numbers_only=0; titles_only=1;; |
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-c|--check) shift; search_item="$1";; |
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-V|--version) show_version;; |
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-h|--help) show_help;; |
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--) shift; break;; |
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-*) show_usage "Unrecognized option: '$1'";; |
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*) break;; |
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esac |
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shift |
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done |
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[ $# -eq 0 ] || show_usage "Unrecognized arguments: '$*'" |
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} |
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|
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show_menu() { |
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local mode title number prefix entry=0 itemno=0 |
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|
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cat "$grubmenu" | sed \ |
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-re '/^\s*(menuentry\s+|submenu\s+|})/!d' \ |
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-re "s/^\s*menuentry\s+'([^']+)'.*\$/M\t\1/g" \ |
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-re 's/^\s*menuentry\s+"([^"]+)".*$/M\t\1/g' \ |
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-re "s/^\s*submenu\s+'([^']+)'.*\$/S\t\1/g" \ |
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-re 's/^\s*submenu\s+"([^"]+)".*$/S\t\1/g' \ |
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-re "s/^\s*}\s*\$/E\t-/g" | |
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while read mode title; do |
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case "$mode" in |
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M) if [ $numbers_only -ne 0 ]; then |
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echo -e "${number}${itemno}" |
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elif [ $titles_only -ne 0 ]; then |
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echo -e "${prefix}${title}" |
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else |
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echo -e "${number}${itemno}\t${prefix}${title}" |
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fi |
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itemno=$(($itemno + 1)) |
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entry=1 |
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;; |
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S) number="${number}${itemno}>" |
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prefix="${prefix}${title}>" |
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itemno=0 |
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;; |
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*) if [ $entry -ne 0 ]; then |
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entry=0 |
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elif [ -n "$number" ]; then |
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number="${number%>}" |
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prefix="${prefix%>}" |
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case "$number" in |
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*">"*) itemno="${number##*>}" |
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number="${number%>*}>" |
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prefix="${prefix%>*}>" |
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itemno=$(($itemno + 1)) |
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;; |
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*) itemno=$number |
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itemno=$(($itemno + 1)) |
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prefix= |
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number= |
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;; |
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esac |
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fi |
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;; |
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esac |
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done |
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} |
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|
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check_item() { |
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local cnt |
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|
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numbers_only=1; titles_only=0 |
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cnt=$(show_menu | grep -swc "$search_item" ||:) |
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[ "$cnt" != "1" ] || exit 0 |
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|
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numbers_only=0; titles_only=1 |
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cnt=$(show_menu | grep -swc "$search_item" ||:) |
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[ "$cnt" != "1" ] || exit 0 |
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|
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[ -z "$cnt" -o "$cnt" = "0" ] && |
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echo "$search_item: menu item not found." >&2 || |
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echo "$search_item: duplicate items found." >&2 |
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exit 1 |
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} |
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parse_args "$@" |
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[ -r "$grubmenu" ] || show_usage "$grubmenu: config file not found." |
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[ -z "$search_item" ] || check_item |
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show_menu |
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