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base-files: sysupgrade: Selectively restore from backups

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For users who wish to restore a subset of the backup. Suitable when
importing a backup from a different architecture where certain config
files would cause problems after reboot.

The CONF_SELECTIVE_RESTORE_FILELIST `filelist.txt` content is a
simple text file, with one filename per line:

```txt
etc/config/file1
etc/config/file2
etc/config/file3
```

Tested on 23.05.5

Signed-off-by: Paul Donald <newtwen+github@gmail.com>
This commit is contained in:
Paul Donald 2024-10-11 01:50:49 +02:00
parent e00b6ba0c8
commit 36b35e484a
2 changed files with 31 additions and 0 deletions
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24
package/base-files/files/sbin/sysupgrade
View File

@ -20,6 +20,8 @@ CONF_IMAGE=
CONF_BACKUP_LIST=0 CONF_BACKUP_LIST=0
CONF_BACKUP= CONF_BACKUP=
CONF_RESTORE= CONF_RESTORE=
CONF_SELECTIVE_RESTORE=
CONF_SELECTIVE_RESTORE_FILELIST=
NEED_IMAGE= NEED_IMAGE=
HELP=0 HELP=0
TEST=0 TEST=0
@ -48,6 +50,7 @@ while [ -n "$1" ]; do
-u) SKIP_UNCHANGED=1;; -u) SKIP_UNCHANGED=1;;
-b|--create-backup) CONF_BACKUP="$2" NEED_IMAGE=1; shift;; -b|--create-backup) CONF_BACKUP="$2" NEED_IMAGE=1; shift;;
-r|--restore-backup) CONF_RESTORE="$2" NEED_IMAGE=1; shift;; -r|--restore-backup) CONF_RESTORE="$2" NEED_IMAGE=1; shift;;
-s|--selectively-restore-backup) CONF_SELECTIVE_RESTORE_FILELIST="$2" CONF_SELECTIVE_RESTORE="$3" NEED_IMAGE=1; shift;shift;;
-l|--list-backup) CONF_BACKUP_LIST=1;; -l|--list-backup) CONF_BACKUP_LIST=1;;
-f) CONF_IMAGE="$2"; shift;; -f) CONF_IMAGE="$2"; shift;;
-F|--force) export FORCE=1;; -F|--force) export FORCE=1;;
@ -98,6 +101,11 @@ backup-command:
restore a .tar.gz created with sysupgrade -b restore a .tar.gz created with sysupgrade -b
then exit. Does not flash an image. If file is '-', then exit. Does not flash an image. If file is '-',
the archive is read from stdin. the archive is read from stdin.
-s | --selectively-restore-backup <file-with-list-of-filenames> <file>
selectively restore a .tar.gz created with sysupgrade -b
by passing a file containing the desired list of filenames,
then exit. Does not flash an image. If file is '-',
the archive is read from stdin.
-l | --list-backup -l | --list-backup
list the files that would be backed up when calling list the files that would be backed up when calling
sysupgrade -b. Does not create a backup file. sysupgrade -b. Does not create a backup file.
@ -336,6 +344,22 @@ if [ -n "$CONF_RESTORE" ]; then
exit $? exit $?
fi fi
if [ -n "$CONF_SELECTIVE_RESTORE" ]; then
if [ "$CONF_SELECTIVE_RESTORE" != "-" ] && [ ! -f "$CONF_SELECTIVE_RESTORE" ]; then
echo "Backup archive '$CONF_SELECTIVE_RESTORE' not found." >&2
exit 1
fi
[ "$VERBOSE" -gt 1 ] && TAR_V="v" || TAR_V=""
v "Selectively restoring config files..."
if [ "$(type -t platform_restore_backup)" = 'platform_restore_backup' ]; then
platform_selectively_restore_backup "$TAR_V"
else
tar -C / -x"${TAR_V}"zf "$CONF_SELECTIVE_RESTORE" -T "$CONF_SELECTIVE_RESTORE_FILELIST"
fi
exit $?
fi
type platform_check_image >/dev/null 2>/dev/null || { type platform_check_image >/dev/null 2>/dev/null || {
echo "Firmware upgrade is not implemented for this platform." >&2 echo "Firmware upgrade is not implemented for this platform." >&2
exit 1 exit 1

7
target/linux/bcm27xx/base-files/lib/upgrade/platform.sh
View File

@ -128,3 +128,10 @@ platform_restore_backup() {
tar -C / -x${TAR_V}zf "$CONF_RESTORE" tar -C / -x${TAR_V}zf "$CONF_RESTORE"
bcm27xx_set_root_part bcm27xx_set_root_part
} }
platform_selectively_restore_backup() {
local TAR_V=$1
tar -C / -x${TAR_V}zf "$CONF_RESTORE" -T "$CONF_SELECTIVE_RESTORE_FILELIST"
bcm27xx_set_root_part
}