#!/system/bin/sh

# This script is responsible for updating debug cookies in SECONDARY_STORAGE
# according to their related system properties.  This is done to give control
# over the cookies at build-time, and also provide a way for a Java-level
# system app to control them (system apps cannot read/write SECONDARY_STORAGE
# directly).  The script is setup to run as a oneshot init service on bootup
# to ensure the build settings for the properites are honored.  It also runs
# whenever one of the properties is changed.

doesCookieRootExist() {
    touch $SECONDARY_STORAGE
    case $? in
        0) return 1;;
        *) return 0;;
    esac
}

addCookie() {
    log -p v -t $tag "Adding $1"
    touch $1
}

rmCookie() {
    log -p v -t $tag "Removing $1"
    rm $1
}

updateCookies() {
    log -p v -t $tag "Updating cookies"
    case $dloadOn in
        1) addCookie $dlcookiePath;;
        *) rmCookie $dlcookiePath;;
    esac
    case $rdumpOn in
        1) addCookie $rdcookiePath;;
        *) rmCookie $rdcookiePath;;
    esac
}

tag="qcookie"
dlcookiePath="$SECONDARY_STORAGE/dlcookie.txt"
rdcookiePath="$SECONDARY_STORAGE/rdcookie.txt"
dloadOn=$(getprop persist.sys.qc.dload.on)
rdumpOn=$(getprop persist.sys.qc.rdump.on)

i=1
while true; do
    doesCookieRootExist
    case $? in 1) updateCookies; exit 0;; esac
    # Powerup with clean userdata can result in a long time before the
    # SECONDARY_STORAGE is mounted, so retry up to 10 minutes.
    case $i in 21) break;; esac
    log -p v -t $tag "Sleeping 30 seconds before retry $i"
    sleep 30
    log -p v -t $tag "Doing retry $i"
    let i=$i+1
done

log -p v -t $tag "No ext storage; giving up"