shell-completion/bash/resolvectl

   1 # resolvectl(1) completion                                  -*- shell-script -*-
   2 # SPDX-License-Identifier: LGPL-2.1+
   3 #
   4 # This file is part of elogind.
   5 #
   6 # Copyright 2018 Yu Watanabe
   7 #
   8 # elogind is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU Lesser General Public License as published by
  10 # the Free Software Foundation; either version 2.1 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # elogind is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16 # General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU Lesser General Public License
  19 # along with elogind; If not, see <http://www.gnu.org/licenses/>.
  20
  21 __contains_word () {
  22         local w word=$1; shift
  23         for w in "$@"; do
  24                 [[ $w = "$word" ]] && return
  25         done
  26 }
  27
  28 __get_interfaces(){
  29         { cd /sys/class/net && echo *; } | \
  30         while read -d' ' -r name; do
  31                 [[ "$name" != "lo" ]] && echo "$name"
  32         done
  33 }
  34
  35 _resolvectl() {
  36         local i comps verb name
  37         local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
  38         local -A OPTS=(
  39                [STANDALONE]='-h --help --version --no-pager -4 -6
  40                              --service-address=no --service-txt=no
  41                              --cname=no --search=no --legend=no'
  42                       [ARG]='-i --interface -p --protocol -t --type -c --class --raw'
  43         )
  44         local -A VERBS=(
  45                    [DOMAIN]='query service openpgp'
  46                    [FAMILY]='tlsa'
  47                    [STATUS]='status'
  48                      [LINK]='revert dns domain nta'
  49                   [RESOLVE]='llmnr mdns'
  50                    [DNSSEC]='dnssec'
  51                [DNSOVERTLS]='dnsovertls'
  52                [STANDALONE]='statistics reset-statistics flush-caches reset-server-features'
  53         )
  54         local -A ARGS=(
  55                    [FAMILY]='tcp udp sctp'
  56                   [RESOLVE]='yes no resolve'
  57                    [DNSSEC]='yes no allow-downgrade'
  58                [DNSOVERTLS]='no opportunistic'
  59         )
  60         local interfaces=$( __get_interfaces )
  61
  62         if __contains_word "$prev" ${OPTS[ARG]}; then
  63                 case $prev in
  64                         --interface|-i)
  65                                 comps="$interfaces"
  66                                 ;;
  67                         --protocol|-p|--type|-t|--class|-c)
  68                                 comps=$( resolvectl --legend=no "$prev" help; echo help )
  69                                 ;;
  70                         --raw)
  71                                 comps="payload packet"
  72                                 ;;
  73                 esac
  74                 COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
  75                 return 0
  76         fi
  77
  78         if [[ "$cur" = -* ]]; then
  79                 COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
  80                 return 0
  81         fi
  82
  83         for ((i=0; i < COMP_CWORD; i++)); do
  84                 if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
  85                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
  86                         verb=${COMP_WORDS[i]}
  87                         break
  88                 fi
  89         done
  90
  91         if [[ -z $verb ]]; then
  92                 comps="${VERBS[*]}"
  93
  94         elif __contains_word "$verb" ${VERBS[STANDALONE]} ${VERBS[DOMAIN]}; then
  95                 comps=''
  96
  97         elif __contains_word "$verb" ${VERBS[STATUS]}; then
  98                 comps="$interfaces"
  99
 100         elif __contains_word "$verb" ${VERBS[FAMILY]}; then
 101                 for ((i++; i < COMP_CWORD; i++)); do
 102                         if __contains_word "${COMP_WORDS[i]}" ${ARGS[FAMILY]} &&
 103                          ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 104                                 name=${COMP_WORDS[i]}
 105                                 break;
 106                         fi
 107                 done
 108                 if [[ -z $name ]]; then
 109                         comps=${ARGS[FAMILY]}
 110                 else
 111                         comps=""
 112                 fi
 113
 114         elif __contains_word "$verb" ${VERBS[LINK]} ${VERBS[RESOLVE]} ${VERBS[DNSSEC]} ${VERBS[DNSOVERTLS]}; then
 115                 for ((i++; i < COMP_CWORD; i++)); do
 116                         if __contains_word "${COMP_WORDS[i]}" $interfaces &&
 117                          ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 118                                 name=${COMP_WORDS[i]}
 119                                 break;
 120                         fi
 121                 done
 122
 123                 if [[ -z $name ]]; then
 124                         comps="$interfaces"
 125
 126                 elif __contains_word "$verb" ${VERBS[RESOLVE]}; then
 127                         name=
 128                         for ((i++; i < COMP_CWORD; i++)); do
 129                                 if __contains_word "${COMP_WORDS[i]}" ${ARGS[RESOLVE]} &&
 130                                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 131                                         name=${COMP_WORDS[i]}
 132                                         break;
 133                                 fi
 134                         done
 135
 136                         if [[ -z $name ]]; then
 137                                 comps=${ARGS[RESOLVE]}
 138                         else
 139                                 comps=''
 140                         fi
 141
 142                 elif __contains_word "$verb" ${VERBS[DNSSEC]}; then
 143                         name=
 144                         for ((i++; i < COMP_CWORD; i++)); do
 145                                 if __contains_word "${COMP_WORDS[i]}" ${ARGS[DNSSEC]} &&
 146                                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 147                                         name=${COMP_WORDS[i]}
 148                                         break;
 149                                 fi
 150                         done
 151
 152                         if [[ -z $name ]]; then
 153                                 comps=${ARGS[DNSSEC]}
 154                         else
 155                                 comps=''
 156                         fi
 157
 158                 elif __contains_word "$verb" ${VERBS[DNSOVERTLS]}; then
 159                         name=
 160                         for ((i++; i < COMP_CWORD; i++)); do
 161                                 if __contains_word "${COMP_WORDS[i]}" ${ARGS[DNSOVERTLS]} &&
 162                                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 163                                         name=${COMP_WORDS[i]}
 164                                         break;
 165                                 fi
 166                         done
 167
 168                         if [[ -z $name ]]; then
 169                                 comps=${ARGS[DNSOVERTLS]}
 170                         else
 171                                 comps=''
 172                         fi
 173
 174                 else
 175                         comps=''
 176                 fi
 177         fi
 178
 179         COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
 180         return 0
 181 }
 182
 183 complete -F _resolvectl resolvectl