archive/dragora-installer/dragora-installer

   1 #! /bin/sh -
   2 #
   3 # Dragora installer
   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="${TMPDIR}/dragora-installer.lockfile"
  26 OUTPUT_TTY=/dev/tty3
  27
  28 chkstatus_or_exit()
  29 {
  30     status=$?
  31
  32     # Clean up temporary files
  33     rm -f -- "$TMPFILE" "$LOCKFILE"
  34
  35     # Clean up temporary subdirectory related to the installer
  36     test -d "$SUBTMPDIR" && rm -rf -- "$SUBTMPDIR"
  37
  38     if test $status -ne 0
  39     then
  40         printf "%s\n" "" "Return status = $status" 1>&2
  41         exit 2;
  42     fi
  43
  44     unset status
  45 }
  46
  47 # Sanity checks
  48
  49 if test ! -d "$TMPDIR"
  50 then
  51     echo "${PROGRAM}: \`${TMPDIR}' is not a qualified temporary directory" 1>&2
  52     exit 1;
  53 fi
  54 if test ! -w "$TMPDIR"
  55 then
  56     echo "${PROGRAM}: \`${TMPDIR}' is not a writable temporary directory" 1>&2
  57     exit 1;
  58 fi
  59
  60 trap 'chkstatus_or_exit' EXIT HUP INT QUIT ABRT TERM
  61
  62 umask 077;      # Remove access for all but user.
  63
  64 # Set a lock to allow only one instance of the installer
  65
  66 if ( set -C ; echo ": $PROGRAM - locked" > $LOCKFILE ) 2> /dev/null
  67 then
  68     true
  69 else
  70     if test -e "$LOCKFILE"
  71     then
  72         echo "Only one instance of \`${PROGRAM}' is allowed." 1>&2
  73         exit 1;
  74     else
  75         echo "${PROGRAM}: \`${LOCKFILE}' lock failed." 1>&2
  76         exit 2;
  77     fi
  78 fi
  79
  80 # Create subdirectory to store the files produced by the installer
  81
  82 SUBTMPDIR="${TMPDIR}/${PROGRAM}"        # By default "/tmp/dragora-installer"
  83 mkdir -p -m 700 -- $SUBTMPDIR
  84 export SUBTMPDIR
  85
  86 # Detect and prepare list of Linux partition(s)
  87
  88 if fdisk -l | grep -q -m 1 Linux
  89 then
  90     fdisk -l | grep Linux | LC_COLLATE=C sort > ${SUBTMPDIR}/partitions
  91 else
  92     printf "%s\n" \
  93      "    Linux partitions were not detected."                               \
  94      ""                                                                      \
  95      "A Linux partition is required to continue the installation.  You can"  \
  96      "use utilities such as fdisk(8), cfdisk(8) or parted(8) to create at"   \
  97      "least one Linux partition.  Then run \`${PROGRAM}' again."             \
  98      ""
  99      exit 1;
 100 fi
 101
 102 umask 022;      # Remove write permission for group and other.
 103
 104 dialog --colors \
 105  --backtitle "\ZbDragora 3.0 Installer" \
 106  --hfile "HELP" \
 107  --title "INSTALLER INFORMATION" \
 108  --msgbox \
 109 "Welcome to \Z3${PROGRAM}\Zn.\n\n\
 110 This program prepares Dragora 3.0 to run on your computer.\n\n\
 111     - To set up Dragora now, press \Zb\Z7ENTER\Zn.\n\n\
 112     - To quit, press \Zb\Z7ESC\Zn.\n\n\
 113 Please read the installer's help before proceeding (\Zb\Z7F1\Zn)." 14 63
 114
 115 # Try to detect and mount the hybrid ISO image, there may be a USB memory
 116 # stick already inserted.  If not, the media menu will be displayed.
 117
 118 if ! blkid -t LABEL="Dragora Packages" 2> /dev/null
 119 then
 120     dialog --colors \
 121      --backtitle "\ZbInstallation Medium" \
 122      --title "Pendrive/SDCard/CDROM" \
 123      --msgbox \
 124 "Please insert the media labeled as \"Dragora Packages\" and\n\
 125 press \Zb\Z7ENTER\Zn to continue.  Otherwise a media selection menu\n\
 126 will be displayed." 7 63
 127     if blkid -t LABEL="Dragora Packages" 2> /dev/null
 128     then
 129         mkdir -p -- /media/dragora-mount
 130         mount -t iso9660 LABEL="Dragora Packages" /media/dragora-mount 2> /dev/null
 131         echo "/media/dragora-mount/packages" > ${SUBTMPDIR}/MediumFound
 132     else
 133         . ./parts/MenuMedia
 134     fi
 135 fi
 136
 137 # Double-check to see the installation directory
 138 if test ! -f "${SUBTMPDIR}/MediumFound"
 139 then
 140     dialog --colors \
 141      --backtitle "\ZbInstallation Medium" \
 142      --title "MEDIUM NOT FOUND" \
 143      --sleep 7 --infobox \
 144 "\nNo means of installation was found to proceed with\n\
 145 the installation of Dragora.  Please check your\n\
 146 drives and the directory containing the software\n\
 147 packages." 8 55
 148     exit 99;
 149 fi
 150