archive/dragora-tools/dragora-keymap

   1 #! /bin/sh -
   2 #
   3 # A script to configure the keyboard map on console
   4 #
   5 # Copyright (c) 2019 Matias Fonzo, <selk@dragora.org>.
   6 #
   7 # Licensed under the Apache License, Version 2.0 (the "License");
   8 # you may not use this file except in compliance with the License.
   9 # You may obtain a copy of the License at
  10 #
  11 #    http://www.apache.org/licenses/LICENSE-2.0
  12 #
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS,
  15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 # See the License for the specific language governing permissions and
  17 # limitations under the License.
  18
  19 # Exit immediately on any error
  20 set -e
  21
  22 PROGRAM="${0##*/}"
  23 TMPDIR="${TMPDIR:-/tmp}"
  24 TMPFILE="${TMPDIR}/${PROGRAM}.${RANDOM-0}$$"
  25 LOCKFILE="${TMPDIR}/dragora-keymap.lockfile"
  26 OUTPUT="${TMPFILE}.data"
  27 KEYMAPS="${KEYMAPS:-/usr/share/keymaps/i386}"
  28
  29 chkstatus_or_exit()
  30 {
  31     status=$?
  32
  33     # Clean up temporary files
  34     rm -f -- "$TMPFILE" "$LOCKFILE"
  35
  36     if test $status -ne 0
  37     then
  38         echo "Return status = $status" 1>&2
  39         exit 2;
  40     fi
  41
  42     unset status
  43 }
  44
  45 # Sanity checks
  46
  47 if test ! -d "$TMPDIR"
  48 then
  49     echo "${PROGRAM}: \`${TMPDIR}' is not a qualified temporary directory" 1>&2
  50     exit 1;
  51 fi
  52 if test ! -w "$TMPDIR"
  53 then
  54     echo "${PROGRAM}: \`${TMPDIR}' is not a writable temporary directory" 1>&2
  55     exit 1;
  56 fi
  57 if test ! -d "$KEYMAPS"
  58 then
  59     echo "${PROGRAM}: \`${KEYMAPS}' the specified directory is not valid" 1>&2
  60     exit 1;
  61 fi
  62
  63 trap 'chkstatus_or_exit' EXIT HUP INT QUIT ABRT TERM
  64
  65 umask 077;      # Remove access for all but user.
  66
  67 # Unfortunately, loadkeys(1) is limited to the superuser;
  68 # we set a lock to allow only one instance of the script.
  69
  70 if ( set -C ; echo ": $PROGRAM - locked" > $LOCKFILE ) 2> /dev/null
  71 then
  72     true
  73 else
  74     if test -e "$LOCKFILE"
  75     then
  76         echo "Only one instance of \`${PROGRAM}' is allowed." 1>&2
  77         exit 1;
  78     else
  79         echo "${PROGRAM}: \`${LOCKFILE}' lock failed." 1>&2
  80         exit 2;
  81     fi
  82 fi
  83
  84 # Compose output file to be shown
  85
  86 # Use a portable find(1) in terms of options, plus sort(1),
  87 # redirects the standard error to see any possible error
  88 search="$(find "$KEYMAPS" -name '*.map*' -print | sort 2> /dev/tty)"
  89
  90 if test -z "$search"
  91 then
  92     echo "No keyboard maps were found in \`${KEYMAPS}'." 1>&2
  93     exit 1;
  94 fi
  95
  96 # Header
  97 printf "%s\n" \
  98  'dialog --colors \'                                            \
  99  ' --backtitle "\Zb${PROGRAM} - Keyboard map configuration" \'  \
 100  ' --title "MAIN MENU" --menu \'                                \
 101  '"Welcome to \Zb${PROGRAM}\Zn!\n\n\'                           \
 102  'The following menu list is organized as \n\'                  \
 103  'keyboard \"layout/language\". \n\n\'                          \
 104  'Select a keyboard map for the console:" 19 56 10 \'           \
 105  > $OUTPUT
 106
 107 # Append 'search' to the body
 108
 109 for item in $search
 110 do
 111     level="${item%/*}"          # Remove all except the last slash.
 112     level="${level##*/}"        # Starting-point under which it was found.
 113     item="${item%.map*}"        # Remove extension(s).
 114     item="${item##*/}"          # Get the base name.
 115
 116     # Ignore unwanted map directories
 117     case $level in
 118     include | fgGIod)
 119         continue
 120         ;;
 121     *)
 122         echo "\"${level}/$item\"        \"\" \\" >> $OUTPUT
 123         ;;
 124     esac
 125 done
 126 unset item level \
 127       search
 128
 129 # End of
 130 printf "2> \$TMPFILE\n\n" >> $OUTPUT
 131
 132 # Import menu
 133 . $OUTPUT
 134
 135 # Read answer from 'TMPFILE'
 136
 137 echo "" >> $TMPFILE;            # Append new line for reading.
 138 IFS= read -r REPLY < $TMPFILE || exit 2;
 139
 140 # Compose values by layout/map to be set
 141
 142 layout="${REPLY%/*}"
 143 map="${REPLY##*/}"
 144
 145 unset REPLY
 146
 147 # The temporary files are not needed anymore
 148 rm -f -- "$TMPFILE" "$OUTPUT"
 149
 150 umask 022;      # Remove write permission for group and other.
 151
 152 # Set keyboard map
 153 loadkeys "${layout}/$map"
 154
 155 while true
 156 do
 157     testkeys="$(
 158      dialog --colors \
 159       --no-mouse --no-cancel --no-ok \
 160       --backtitle "\Zb${PROGRAM} - Keymap test" \
 161       --title "TEST" --hline "${layout}/$map" \
 162       --inputbox "Try the chosen keyboard map by typing something.\n\n\
 163 Once satisfied type \"\Zb1\ZB\" (or \Zby\ZB) and press \ZbENTER\ZB. \n\
 164 Type \"\Zb2\ZB\" (or \Zbn\ZB) plus \ZbENTER\ZB to choose a different
 165 keyboard map." 12 56 2>&1 > /dev/tty
 166     )"
 167     case $testkeys in
 168     1 | Y | y)
 169         break
 170         ;;
 171     2 | N | n)
 172         rm -- "$LOCKFILE"
 173         exec "$0"
 174         ;;
 175     esac
 176 done
 177 unset testkeys
 178
 179 dialog --colors \
 180  --backtitle "\Zb${PROGRAM} - Configuration file" \
 181  --title "SAVE" --yesno \
 182 "Would do you like to save this change for the next reboot?." 7 54
 183
 184 dialog --clear
 185
 186 echo "Setting 'RC_KEYMAP=${layout}/$map' on /etc/rc.conf ..."
 187 echo ",s/^\(RC_KEYMAP\)=.*/\1=${layout}\/${map}/"$'\nw' | \
 188  ed -s /etc/rc.conf && echo Done.
 189