Create the backing files for the USB drives on a separate partition.

windows_archive/create-backingfiles-partition.sh

@@ -0,0 +1,15 @@
+#!/bin/bash -eu
+
+BACKINGFILES_MOUNTPOINT="$1"
+  
+PARTITION_TABLE=$(parted -m /dev/mmcblk0 unit s print)
+ROOT_PARTITION_LINE=$(echo "$PARTITION_TABLE" | grep -e "^2:")
+LAST_ROOT_PARTITION_SECTOR=$(echo "$ROOT_PARTITION_LINE" | sed 's/s//g' | cut -d ":" -f 3)
+
+FIRST_BACKINGFILES_PARTITION_SECTOR=$(( $LAST_ROOT_PARTITION_SECTOR + 1 ))
+
+parted -m /dev/mmcblk0 u s mkpart primary ext4 "$FIRST_BACKINGFILES_PARTITION_SECTOR" 100%
+
+mkfs.ext4 /dev/mmcblk0p3
+
+echo "/dev/mmcblk0p3 $BACKINGFILES_MOUNTPOINT ext4 auto,rw,noatime 0 2" >> /etc/fstab

windows_archive/create-backingfiles.sh

@@ -0,0 +1,37 @@
+#!/bin/bash -eu
+
+SPACE_TO_USE="$1"
+CAM_PERCENT="$2"
+BACKINGFILES_MOUNTPOINT="$3"
+
+G_MASS_STORAGE_CONF_FILE_NAME=/etc/modprobe.d/g_mass_storage.conf
+
+function add_drive () {
+  local name="$1"
+  local label="$2"
+  local size="$3"
+
+  local filename="$4"
+  fallocate -l "$size"K "$filename"
+  mkfs.vfat "$filename" -F 32 -n "$label"
+
+  local mountpoint=/mnt/"$name"
+
+  mkdir "$mountpoint"
+  echo "$filename $mountpoint vfat noauto,users,umask=000 0 0" >> /etc/fstab
+}
+
+CAM_DISK_SIZE="$(( $SPACE_TO_USE * $CAM_PERCENT / 100 ))"
+CAM_DISK_FILE_NAME="$BACKINGFILES_MOUNTPOINT/cam_disk.bin"
+add_drive "cam" "CAM" "$CAM_DISK_SIZE" "$CAM_DISK_FILE_NAME"
+
+if [ "$CAM_PERCENT" -lt 100 ]
+then
+  MUSIC_PERCENT="$(( 100 - $CAM_PERCENT ))"
+  MUSIC_DISK_SIZE="$(( $SPACE_TO_USE * $MUSIC_PERCENT / 100 ))"
+  MUSIC_DISK_FILE_NAME="$BACKINGFILES_MOUNTPOINT/music_disk.bin"
+  add_drive "music" "MUSIC" "$MUSIC_DISK_SIZE" "$MUSIC_DISK_FILE_NAME"
+  echo "options g_mass_storage file=$CAM_DISK_FILE_NAME,$MUSIC_DISK_FILE_NAME removable=1,1 ro=0,0 stall=0 iSerialNumber=123456" > G_MASS_STORAGE_CONF_FILE_NAME
+else
+  echo "options g_mass_storage file=$CAM_DISK_FILE_NAME removable=1 ro=0 stall=0 iSerialNumber=123456" > G_MASS_STORAGE_CONF_FILE_NAME
+fi

windows_archive/setup-piForHeadlessConfig.ps1

@@ -23,7 +23,7 @@ Write-Verbose "Updating $configPath ..."
 
 Write-Verbose "Updating $cmdlinePath ..."
 $cmdlinetxtContent = gc -Raw $cmdlinePath
-$cmdlinetxtContent.Replace("rootwait", "rootwait modules-load=dwc2,g_ether") | Out-File -FilePath $cmdlinePath -Encoding utf8
+$cmdlinetxtContent.Replace("rootwait", "rootwait modules-load=dwc2,g_ether").Replace(" init=/usr/lib/raspi-config/init_resize.sh", "") | Out-File -FilePath $cmdlinePath -Encoding utf8
 
 Write-Verbose "Enabling SSH ..."
 [System.IO.File]::CreateText($sshPath).Dispose()

windows_archive/setup-teslausb

@@ -1,6 +1,8 @@
 #!/bin/bash -eu
 
-if [ "$(whoami)" != "root" ]
+BRANCH=u/cimryan/readonlyrootfs
+
+if ! [ $(id -u) = 0 ]
 then
   echo "STOP: Run sudo -i."
   exit 1
@@ -15,74 +17,88 @@ function check_variable () {
   fi
 }
 
-check_variable "archiveserver"
+function check_archive_server_reachable () {
-check_variable "sharename"
+  echo "Verifying that the archive server $archiveserver is reachable..."
-check_variable "shareuser"
+  local serverunreachable=false
-check_variable "sharepassword"
+  ping -c 1 -w 1 "$archiveserver" 1>/dev/null 2>&1 || serverunreachable=true
-check_variable "campercent"
   
-serverunreachable=false
+  if [ "$serverunreachable" = true ]
-ping -c 1 -w 1 "$archiveserver" 1>/dev/null 2>&1 || serverunreachable=true
+  then
+    echo "STOP: The archive server $archiveserver is unreachable. Try specifying its IP address instead."
+    exit 1
+  fi
   
-if [ "$serverunreachable" = true ]
+  echo "The archive server is reachable."
-then
-  echo "STOP: The archive server $archiveserver is unreachable. Try specifying its IP address instead."
-  exit 1
-fi
-
-archiveserverip="$(getent hosts $archiveserver | cut -d' ' -f1)"
-
-available_space="$(($(df --output=avail / | tail -1) - 1000000))"
-
-if [ "$available_space" -lt 0 ]
-then
-  echo "STOP: The MicroSD card is too small."
-  exit 1
-fi
-
-function add_drive () {
-  local name="$1"
-  local label="$2"
-  local size="$3"
-
-  local filename="$4"
-  fallocate -l "$size"K "$filename"
-  mkfs.vfat "$filename" -F 32 -n "$label"
-
-  local mountpoint=/mnt/"$name"
-
-  mkdir "$mountpoint"
-  echo "$filename $mountpoint vfat noauto,users,umask=000 0 0" >> /etc/fstab
 }
 
-pushd ~
+function check_available_space () {
+  echo "Verifying that there is sufficient space available on the MicroSD card..."
+  local available_space="$1"
+  if [ "$available_space" -lt  4294967296 ]
+  then
+    echo "STOP: The MicroSD card is too small."
+    exit 1
+  fi
   
-cp /boot/cmdline.txt ~
+  echo "There is sufficient space available."
-cat ~/cmdline.txt | sed 's/[[:space:]]\+modules-load=[^ [:space:]]\+//' | sed 's/rootwait/rootwait modules-load=dwc2/' > /boot/cmdline.txt
+}
-rm ~/cmdline.txt
 
-mkdir /mnt/archive
+function fix_cmdline_txt_modules_load () 
+{
+  echo "Fixing the modules-load parameter in /boot/cmdline.txt..."
+  cp /boot/cmdline.txt ~
+  cat ~/cmdline.txt | sed 's/[[:space:]]\+modules-load=[^ [:space:]]\+//' | sed 's/rootwait/rootwait modules-load=dwc2/' > /boot/cmdline.txt
+  rm ~/cmdline.txt
+  echo "Fixed cmdline.txt."
+}
 
-echo "" >> /etc/fstab
+BACKINGFILES_MOUNTPOINT=/backingfiles
-echo "//$archiveserverip/$sharename /mnt/archive cifs vers=3,credentials=/root/.teslaCamArchiveCredentials,iocharset=utf8,file_mode=0777,dir_mode=0777 0" >> /etc/fstab
 
-echo "username=$shareuser" > /root/.teslaCamArchiveCredentials
+function create_usb_drive_backing_files () {
-echo "password=$sharepassword" >> /root/.teslaCamArchiveCredentials
+  wget https://raw.githubusercontent.com/cimryan/teslausb/"$BRANCH"/windows_archive/create-backingfiles-partition.sh
+  chmod +x ./create-backingfiles-partition.sh
+  ./create-backingfiles-partition.sh "$BACKINGFILES_MOUNTPOINT"
   
-mkdir /root/bin
+  echo "Mounting the partition for the backing files..."
+  mount /backingfiles
+  echo "Mounted the partition for the backing files."
   
-wget https://raw.githubusercontent.com/cimryan/teslausb/master/windows_archive/archiveloop
+  wget https://raw.githubusercontent.com/cimryan/teslausb/"$BRANCH"/windows_archive/create-backingfiles.sh
-sed s/ARCHIVE_HOST_NAME=archiveserver/ARCHIVE_HOST_NAME=$archiveserver/ ~/archiveloop > /root/bin/archiveloop
+  chmod +x ./create-backingfiles.sh
-rm ~/archiveloop
+  ./create-backingfiles.sh "$AVAILABLE_SPACE" "$campercent" "$BACKINGFILES_MOUNTPOINT" 
-chmod +x /root/bin/archiveloop
+}
 
-pushd /root/bin
+function configure_archive () {
-wget https://raw.githubusercontent.com/cimryan/teslausb/master/windows_archive/archive-teslacam-clips
+  echo "Configuring the archive..."
-chmod +x archive-teslacam-clips
+  mkdir /mnt/archive
-popd
+  local archive_server_ip_address="$(getent hosts $archiveserver | cut -d' ' -f1)"
+  echo "//$archive_server_ip_address/$sharename /mnt/archive cifs vers=3,credentials=/root/.teslaCamArchiveCredentials,iocharset=utf8,file_mode=0777,dir_mode=0777 0" >> /etc/fstab
   
-echo "#!/bin/bash -eu" > ~/rc.local
+  echo "username=$shareuser" > /root/.teslaCamArchiveCredentials
-tail -n +2 /etc/rc.local | sed '$d' >> ~/rc.local
+  echo "password=$sharepassword" >> /root/.teslaCamArchiveCredentials
+  echo "Configured the archive."
+}
+
+function configure_archive_scripts () {
+  echo "Configuring the archive scripts..."
+  mkdir /root/bin
+  
+  wget https://raw.githubusercontent.com/cimryan/teslausb/"$BRANCH"/windows_archive/archiveloop
+  sed s/ARCHIVE_HOST_NAME=archiveserver/ARCHIVE_HOST_NAME=$archiveserver/ ~/archiveloop > /root/bin/archiveloop
+  rm ~/archiveloop
+  chmod +x /root/bin/archiveloop
+  
+  pushd /root/bin
+  wget https://raw.githubusercontent.com/cimryan/teslausb/"$BRANCH"/windows_archive/archive-teslacam-clips
+  chmod +x archive-teslacam-clips
+  popd
+  echo "Configured the archive scripts."
+}
+
+function configure rc_local () {
+  echo "Configuring /etc/rc.local to run the archive scripts at startup..."
+  echo "#!/bin/bash -eu" > ~/rc.local
+  tail -n +2 /etc/rc.local | sed '$d' >> ~/rc.local
 cat << 'EOF' >> ~/rc.local
 LOGFILE=/tmp/rc.local.log
 
@@ -97,26 +113,49 @@ log "All done"
 exit 0
 EOF
 
-cat ~/rc.local > /etc/rc.local
+  cat ~/rc.local > /etc/rc.local
-rm ~/rc.local
+  rm ~/rc.local
+  echo "Configured rc.local."
+}
 
-cam_disk_size="$(( $available_space * $campercent / 100 ))"
+function configure_hostname () {
-cam_disk_file_name="/cam_disk.bin"
+  echo "Configuring the hostname..."
-add_drive "cam" "CAM" "$cam_disk_size" "$cam_disk_file_name"
   
-if [ "$campercent" -lt 100 ]
+  local new_host_name="teslausb"
-then
+  cp /etc/hosts ~
-  musicpercent="$(( 100 - $campercent ))"
+  sed 's/raspberrypi/$new_host_name/g' ~/hosts > /etc/hosts
-  music_disk_size="$(( $available_space * $musicpercent / 100 ))"
-  music_disk_file_name="/music_disk.bin"
-  add_drive "music" "MUSIC" "$music_disk_size" "$music_disk_file_name"
-  echo "options g_mass_storage file=$cam_disk_file_name,$music_disk_file_name removable=1,1 ro=0,0 stall=0 iSerialNumber=123456" > /etc/modprobe.d/g_mass_storage.conf
-else
-  echo "options g_mass_storage file=$cam_disk_file_name removable=1 ro=0 stall=0 iSerialNumber=123456" > /etc/modprobe.d/g_mass_storage.conf
-fi
   
-cp /etc/hosts ~
+  cp /etc/hostname ~
-sed s/raspberrypi/teslausb/g ~/hosts > /etc/hosts
+  sed 's/raspberrypi/$new_host_name/g' ~/hostname > /etc/hostname
+  echo "Configured the hostname."
+}
 
-cp /etc/hostname ~
+echo "Verifying environment variables..."
-sed s/raspberrypi/teslausb/g ~/hostname > /etc/hostname
+
+check_variable "archiveserver"
+check_variable "sharename"
+check_variable "shareuser"
+check_variable "sharepassword"
+check_variable "campercent"
+
+check_archive_server_reachable
+
+AVAILABLE_SPACE="$( parted -m /dev/mmcblk0 u b print free | tail -1 | cut -d ":" -f 4 | sed 's/B//g' )"
+check_available_space "$AVAILABLE_SPACE"
+
+
+pushd ~
+
+fix_cmdline_txt_modules_load
+
+echo "" >> /etc/fstab
+
+create_usb_drive_backing_files
+
+configure_archive
+
+configure_archive_scripts
+
+configure rc_local
+
+configure_hostname