018b5b62c4
Fixes unable to flash an update.zip over a formatted /system Change-Id: Ia163262585cb2ef414c6996837834c512d774243
81 lines
1.4 KiB
Bash
Executable File
81 lines
1.4 KiB
Bash
Executable File
#!/sbin/sh
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#
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# Backup and restore addon /system files
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#
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export C=/tmp/backupdir
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export S=/system
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export V=9
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# Mount /system if it is not already mounted
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mount_system() {
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if ! mount | grep -q " $S " ; then
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mount $S
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fi
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}
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# Unmount /system unless it is already unmounted
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umount_system() {
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if mount | grep -q " $S " ; then
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umount $S
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fi
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}
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# Preserve /system/addon.d in /tmp/addon.d
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preserve_addon_d() {
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mkdir -p /tmp/addon.d/
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cp -a /system/addon.d/* /tmp/addon.d/
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chmod 755 /tmp/addon.d/*.sh
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}
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# Restore /system/addon.d in /tmp/addon.d
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restore_addon_d() {
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cp -a /tmp/addon.d/* /system/addon.d/
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rm -rf /tmp/addon.d/
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}
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# Proceed only if /system is the expected major version
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check_prereq() {
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if ( ! grep -q "^ro.cm.version=$V.*" /system/build.prop ); then
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echo "Not backing up files from incompatible version."
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umount_system
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exit 127
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fi
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}
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# Execute /system/addon.d/*.sh scripts with $1 parameter
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run_stage() {
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for script in $(find /tmp/addon.d/ -name '*.sh' |sort -n); do
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$script $1
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done
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}
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case "$1" in
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backup)
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mkdir -p $C
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mount_system
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check_prereq
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preserve_addon_d
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run_stage pre-backup
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run_stage backup
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run_stage post-backup
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umount_system
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;;
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restore)
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mount_system
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check_prereq
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run_stage pre-restore
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run_stage restore
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run_stage post-restore
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restore_addon_d
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umount_system
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rm -rf $C
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sync
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;;
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*)
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echo "Usage: $0 {backup|restore}"
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exit 1
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esac
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exit 0
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