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Commit a0583ca7 authored by Davide Garberi's avatar Davide Garberi Committed by Aaron Kling
Browse files

prebuilt: backuptool: Implement dynamic system mount for A-only 

* Dynamically mount system to the path chosen by the recovery through backuptool
* This can be helpful because of the fragmentation that will happen with system mount in recovery after Q

Change-Id: I2d1e775efcf87e33319bc7790d1e54bca72116d3
parent 81890e35

prebuilt/common/bin/backuptool.sh

+33 −1
Original line number Diff line number Diff line
@@ -4,7 +4,8 @@ 
#



export C=/tmp/backupdir

export S=$2

export SYSDEV="$(readlink -nf "$2")"

export SYSFS="$3"

export V=16.0



export ADDOND_VERSION=1
@@ -94,11 +95,38 @@ if [ -d /tmp/addon.d/ ]; then 
fi

}



determine_system_mount() {

  if grep -q -e"^$SYSDEV" /proc/mounts; then

    umount $(grep -e"^$SYSDEV" /proc/mounts | cut -d" " -f2)

  fi



  if [ -d /system_root ]; then

    SYSMOUNT="/system_root"

    export S=/system_root/system

  else

    SYSMOUNT="/system"

    export S=/system

  fi



}



mount_system() {

  mount -t $SYSFS $SYSDEV $SYSMOUNT -o rw,discard

}



unmount_system() {

  umount $SYSMOUNT

}



determine_system_mount



case "$1" in

  backup)

    mount_system

    mkdir -p $C

    if check_prereq; then

        if check_whitelist system; then

            unmount_system

            exit 127

        fi

    fi
@@ -107,10 +135,13 @@ case "$1" in 
    run_stage pre-backup

    run_stage backup

    run_stage post-backup

    unmount_system

  ;;

  restore)

    mount_system

    if check_prereq; then

        if check_whitelist tmp; then

            unmount_system

            exit 127

        fi

    fi
@@ -121,6 +152,7 @@ case "$1" in 
    restore_addon_d

    rm -rf $C

    sync

    unmount_system

  ;;

  *)

    echo "Usage: $0 {backup|restore}"