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alias/overlay

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This commit is contained in:
Marc Beninca 2024-11-29 19:45:58 +01:00
parent ecff8f16bc
commit dc66287ed1
Signed by: marc.beninca
GPG key ID: 9C7613450C80C24F
1 changed files with 15 additions and 15 deletions
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30
sh/alias/overlay.sh
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@ -3,7 +3,7 @@ a__overlay_bind_mount() {
local directory local directory
for directory in "dev" "dev/pts" "proc" "sys"; do for directory in "dev" "dev/pts" "proc" "sys"; do
if ! mount --bind "/${directory}" "overlay/mount/${directory}"; then if ! mount --bind "/${directory}" "overlay/mount/${directory}"; then
sh_log_error "Unable to bind mount directory: ${directory}" rwx_log_error "Unable to bind mount directory: ${directory}"
return 1 return 1
fi fi
done done
@ -14,7 +14,7 @@ a__overlay_bind_unmount() {
local directory local directory
for directory in "sys" "proc" "dev/pts" "dev"; do for directory in "sys" "proc" "dev/pts" "dev"; do
if ! umount --lazy "overlay/mount/${directory}"; then if ! umount --lazy "overlay/mount/${directory}"; then
sh_log_error "Unable to bind unmount directory: ${directory}" rwx_log_error "Unable to bind unmount directory: ${directory}"
return 1 return 1
fi fi
done done
@ -47,36 +47,36 @@ orm() { a__overlay_root_mount "${@}"; }
a__overlay_root_mount() { a__overlay_root_mount() {
local root="${1}" local root="${1}"
if [ -z "${root}" ]; then if [ -z "${root}" ]; then
sh_log_error "No root target directory" rwx_log_error "No root target directory"
return 1 return 1
fi fi
root="$(realpath "${root}")" root="$(realpath "${root}")"
if ! mkdir "overlay"; then if ! mkdir "overlay"; then
sh_log_error "Unable to make overlay directory" rwx_log_error "Unable to make overlay directory"
return 2 return 2
fi fi
( (
if ! cd "overlay"; then if ! cd "overlay"; then
sh_log_error "Unable to move into overlay directory" rwx_log_error "Unable to move into overlay directory"
return 3 return 3
fi fi
local directory local directory
for directory in "lower" "upper" "work" "mount"; do for directory in "lower" "upper" "work" "mount"; do
if ! mkdir --parents "${directory}"; then if ! mkdir --parents "${directory}"; then
sh_log_error "Unable to make directory: ${directory}" rwx_log_error "Unable to make directory: ${directory}"
return 4 return 4
fi fi
done done
local file="${root}/filesystem.squashfs" local file="${root}/filesystem.squashfs"
if ! mount "${file}" "lower"; then if ! mount "${file}" "lower"; then
sh_log_error "Unable to lower mount: ${file}" rwx_log_error "Unable to lower mount: ${file}"
return 5 return 5
fi fi
if ! mount \ if ! mount \
-o "lowerdir=lower,upperdir=upper,workdir=work" \ -o "lowerdir=lower,upperdir=upper,workdir=work" \
-t "overlay" \ -t "overlay" \
"overlay" "mount"; then "overlay" "mount"; then
sh_log_error "Unable to overlay mount" rwx_log_error "Unable to overlay mount"
return 6 return 6
fi fi
) )
@ -106,35 +106,35 @@ oru() { a__overlay_root_unmount "${@}"; }
a__overlay_root_unmount() { a__overlay_root_unmount() {
( (
if ! cd "overlay"; then if ! cd "overlay"; then
sh_log_error "Unable to move into overlay directory" rwx_log_error "Unable to move into overlay directory"
return 1 return 1
fi fi
if ! umount "mount"; then if ! umount "mount"; then
sh_log_error "Unable to unmount mount directory" rwx_log_error "Unable to unmount mount directory"
return 2 return 2
fi fi
if ! rmdir "mount"; then if ! rmdir "mount"; then
sh_log_error "Unable to remove mount directory" rwx_log_error "Unable to remove mount directory"
return 3 return 3
fi fi
local directory local directory
for directory in "upper" "work"; do for directory in "upper" "work"; do
if ! rm --force --recursive "${directory}"; then if ! rm --force --recursive "${directory}"; then
sh_log_error "Unable to remove directory: ${directory}" rwx_log_error "Unable to remove directory: ${directory}"
return 4 return 4
fi fi
done done
if ! umount "lower"; then if ! umount "lower"; then
sh_log_error "Unable to unmount lower directory" rwx_log_error "Unable to unmount lower directory"
return 5 return 5
fi fi
if ! rmdir "lower"; then if ! rmdir "lower"; then
sh_log_error "Unable to remove lower directory" rwx_log_error "Unable to remove lower directory"
return 6 return 6
fi fi
) )
if ! rmdir "overlay"; then if ! rmdir "overlay"; then
sh_log_error "Unable to remove overlay directory" rwx_log_error "Unable to remove overlay directory"
return 7 return 7
fi fi
} }