installer: Fix download of the ISO image

[ipfire-2.x.git] / src / installer / downloadsource.sh

diff --git a/src/installer/downloadsource.sh b/src/installer/downloadsource.sh
index 1f6c432dd826b72764a5be9f39633a5736e58906..c74f9e232d2e1dc1874152ca71508736bb903c3c 100644 (file)
--- a/src/installer/downloadsource.sh
+++ b/src/installer/downloadsource.sh
@@ -19,36 +19,48 @@
 #                                                                             #
 ###############################################################################
 
-#lfs change the url while build!
-IPFireISO=ipfire.iso
-#
-
-#Get user defined download from boot cmdline
-grep "netinstall=" /proc/cmdline > /dev/null && CMDLINE=1
-if ( [ "$CMDLINE" == "1" ]); then
-       read CMDLINE < /proc/cmdline
-       POS=${CMDLINE%%netinstall*}
-       POS=${#POS}
-       IPFireISO=`echo ${CMDLINE:POS} | cut -d"=" -f2 | cut -d" " -f1`
+function download() {
+       wget -U "IPFire-NetInstall/2.x" "$@"
+}
+
+if [ $# -lt 2 ]; then
+       echo "$0: Insufficient number of arguments" >&2
+       exit 2
+fi
+
+OUTPUT="${1}"
+URL="${2}"
+
+# Mount a tmpfs which is big enough to hold the ISO image
+OUTPUT_DIR="${OUTPUT%/*}"
+
+mkdir -p "${OUTPUT_DIR}"
+if ! mount -t tmpfs none "${OUTPUT_DIR}" -o size=512M; then
+       echo "Could not mount tmpfs to ${OUTPUT_DIR}" >&2
+       exit 1
 fi
 
-echo
-echo "Configure Network with DHCP..."
-dhcpcd
-echo
-echo "Sleep 15s..."
-sleep 15
-echo
-echo "Download with wget..."
-wget $IPFireISO -O /tmp/download.iso -t3 -U IPFire_NetInstall/2.x
-wget $IPFireISO.md5 -O /tmp/download.iso.md5 -t3 -U IPFire_NetInstall/2.x
-echo
-echo "Checking download..."
-md5_file=`md5sum /tmp/download.iso | cut -d" " -f1`
-md5_down=`cat /tmp/download.iso.md5 | cut -d" " -f1`
-if [ "$md5_file" == "$md5_down" ]; then
-       echo -n "/tmp/download.iso" > /tmp/source_device
-       exit 0
+echo "Downloading ${URL}..."
+if ! download -O "${OUTPUT}" "${URL}"; then
+       echo "Download failed" >&2
+
+       rm -f "${OUTPUT}"
+       exit 1
 fi
-echo "Error - SKIP"
-exit 10
+
+# Download went well. Checking for MD5 sum
+if download -O "${OUTPUT}.md5" "${URL}.md5" &>/dev/null; then
+       # Read downloaded checksum
+       read -r md5sum rest < "${OUTPUT}.md5"
+       rm -f "${OUTPUT}.md5"
+
+       # Compute checkum of downloaded image file
+       read -r md5sum_image rest <<< "$(md5sum "${OUTPUT}")"
+
+       if [ "${md5sum}" != "${md5sum_image}" ]; then
+               echo "MD5 sum mismatch: ${md5sum} != ${md5sum_image}" >&2
+               exit 2
+       fi
+fi
+
+exit 0