src/installer/downloadsource.sh

   1 #!/bin/sh
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2010  IPFire Team  <info@ipfire.org>                          #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 function download() {
  23         wget -U "IPFire-NetInstall/2.x" "$@"
  24 }
  25
  26 if [ $# -lt 2 ]; then
  27         echo "$0: Insufficient number of arguments" >&2
  28         exit 2
  29 fi
  30
  31 OUTPUT="${1}"
  32 URL="${2}"
  33
  34 # Mount a tmpfs which is big enough to hold the ISO image
  35 OUTPUT_DIR="${OUTPUT%/*}"
  36
  37 mkdir -p "${OUTPUT_DIR}"
  38 if ! mount -t tmpfs none "${OUTPUT_DIR}" -o size=512M; then
  39         echo "Could not mount tmpfs to ${OUTPUT_DIR}" >&2
  40         exit 1
  41 fi
  42
  43 echo "Downloading ${URL}..."
  44 if ! download -O "${OUTPUT}" "${URL}"; then
  45         echo "Download failed" >&2
  46
  47         rm -f "${OUTPUT}"
  48         exit 1
  49 fi
  50
  51 # Download went well. Checking for MD5 sum
  52 if download -O "${OUTPUT}.md5" "${URL}.md5" &>/dev/null; then
  53         # Read downloaded checksum
  54         read -r md5sum rest < "${OUTPUT}.md5"
  55         rm -f "${OUTPUT}.md5"
  56
  57         # Compute checkum of downloaded image file
  58         read -r md5sum_image rest <<< "$(md5sum "${OUTPUT}")"
  59
  60         if [ "${md5sum}" != "${md5sum_image}" ]; then
  61                 echo "MD5 sum mismatch: ${md5sum} != ${md5sum_image}" >&2
  62                 exit 2
  63         fi
  64 fi
  65
  66 exit 0