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Make calculations of backng file size in terms of free 1k blocks

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cimryan
2018-10-14 20:39:12 -07:00
parent c0cab4d624
commit c1e840fa9f
2 changed files with 12 additions and 11 deletions
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14
windows_archive/create-backingfiles.sh
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@@ -1,8 +1,7 @@
#!/bin/bash -eu
SPACE_TO_USE="$1"
CAM_PERCENT="$2"
BACKINGFILES_MOUNTPOINT="$3"
CAM_PERCENT="$1"
BACKINGFILES_MOUNTPOINT="$2"
G_MASS_STORAGE_CONF_FILE_NAME=/etc/modprobe.d/g_mass_storage.conf
@@ -12,7 +11,7 @@ function add_drive () {
local size="$3"
local filename="$4"
fallocate -l "$size" "$filename"
fallocate -l "$size"K "$filename"
mkfs.vfat "$filename" -F 32 -n "$label"
local mountpoint=/mnt/"$name"
@@ -21,14 +20,15 @@ function add_drive () {
echo "$filename $mountpoint vfat noauto,users,umask=000 0 0" >> /etc/fstab
}
CAM_DISK_SIZE="$(( $SPACE_TO_USE * $CAM_PERCENT / 100 ))"
FREE_1K_BLOCKS="$(df --output=avail --block-size=1K /backingfiles/ | tail -n 1)"
CAM_DISK_SIZE="$(( $FREE_1K_BLOCKS * $CAM_PERCENT / 100 ))"
CAM_DISK_FILE_NAME="$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 * $MUSIC_PERCENT / 100 ))"
MUSIC_DISK_SIZE="$(df --output=avail --block-size=1K /backingfiles/ | tail -n 1)"
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

9
windows_archive/setup-teslausb
View File

@@ -33,7 +33,9 @@ function check_archive_server_reachable () {
function check_available_space () {
echo "Verifying that there is sufficient space available on the MicroSD card..."
local available_space="$1"
local available_space="$( parted -m /dev/mmcblk0 u b print free | tail -1 | cut -d ":" -f 4 | sed 's/B//g' )"
if [ "$available_space" -lt 4294967296 ]
then
echo "STOP: The MicroSD card is too small."
@@ -66,7 +68,7 @@ function create_usb_drive_backing_files () {
wget https://raw.githubusercontent.com/cimryan/teslausb/"$BRANCH"/windows_archive/create-backingfiles.sh
chmod +x ./create-backingfiles.sh
./create-backingfiles.sh "$AVAILABLE_SPACE" "$campercent" "$BACKINGFILES_MOUNTPOINT"
./create-backingfiles.sh "$campercent" "$BACKINGFILES_MOUNTPOINT"
}
function configure_archive () {
@@ -141,8 +143,7 @@ check_variable "campercent"
check_archive_server_reachable
AVAILABLE_SPACE="$( parted -m /dev/mmcblk0 u b print free | tail -1 | cut -d ":" -f 4 | sed 's/B//g' )"
check_available_space "$AVAILABLE_SPACE"
check_available_space
pushd ~