[ZIP] Dynamic automated build.prop editing

[Lownita]

I want to achieve the following two tasks by flashing a .zip file in recovery:

1. Open the following file:

/system/etc/permissions/handheld_core_hardware.xml​

Add in the following lines right before the </permissions> closing tag at the end:

<feature name="android.software.vr.mode" />
<feature name="android.hardware.vr.high_performance" />

2. Open

/system/build.prop

Add this line:

ro.product.device=sailfish

So how can I do it?

 

[KrisM22]

Before doing this, backup your ROM in TWRP, since if anything goes wrong you won't be able to boot your ROM, and you'll have to boot to TWRP and restore that nandroid.

LineageOS ROM 5-18-2017, opengapps nano 5-18. Magisk(hide)

This is the result of many tests:
Huge thanks for this.
I made a tweak.prop and put copies on both internal storage and SDcard.

I flashed 5._MOD_build_prop.zip which was in a separate folder with nothing else, in internal storage.

I had to put a carriage return(enter) after BACKUP=n as well as the extra one at the end.

It puts the mod at the end of /system/build.prop

This is my tweak.prop

BACKUP=n

ro.build.fingerprint=motorola/osprey_retus_2gb/osprey_u2:6.0/MPI24.65-25/28:user/release-keys

remember to put an EXTRA line feed/carriage return after BACKUP=n, and at the end.

WORKED!

THANKS!

 

[KrisM22]

bad post.

 

[jerethi]

So... I know this is totally exactly what I have been looking for, as I have been flashing nightly builds of AICP for my 5X. However, I have absolutely no idea how to get this up and running. I understand this is a total noob question, but can someone take me through step by step how I would set this up?

 

[m0han]

bad post.

i see you're using tweakprop v0.5.9 zip file. please share the zip file here. thanks.

 

[HTalaia]

Help

Hi,

I was searching for a solution for a Vodafone Tablet that i have (known as Vodafone Tab Prime 7, or VDF 1400). I've been looking for a solution for a long time and i found that this one is very difficult to root or to change the recovery because it's very well locked by vodafone (and vodafone is no longer supporting this tablet).
This tablet is stuck on Android 6.0.1 (it's old, i know, but for the usage it is ok) and i would like to change the build.prop in order to change to userdebug to activate the multiwindow feature.
I have tried the zip file to change the build.prop but when i try to apply the zip on the recovery (stock) it returns the error "E: footer is wrong and E: signature verification failed".
Can anyone help me, please?

I am a noob in this subjects and i need help to solve this

 

[christian.arvin]

Hi,

I was searching for a solution for a Vodafone Tablet that i have (known as Vodafone Tab Prime 7, or VDF 1400). I've been looking for a solution for a long time and i found that this one is very difficult to root or to change the recovery because it's very well locked by vodafone (and vodafone is no longer supporting this tablet).
This tablet is stuck on Android 6.0.1 (it's old, i know, but for the usage it is ok) and i would like to change the build.prop in order to change to userdebug to activate the multiwindow feature.
I have tried the zip file to change the build.prop but when i try to apply the zip on the recovery (stock) it returns the error "E: footer is wrong and E: signature verification failed".
Can anyone help me, please?

I am a noob in this subjects and i need help to solve this

Its not meant to be flashed using the stock recovery.

You need a custom recovery to use this script, like TWRP.

Judging by your story, you wont be able to use it.

 

[HTalaia]

Its not meant to be flashed using the stock recovery.

You need a custom recovery to use this script, like TWRP.

Judging by your story, you wont be able to use it.

Thank you for your help.
Well, the next step is trying to install a custom recovery... but seams that it won't be possible... I will keep looking and trying to find solutions.

Thank you once again

 

[DumiJ58]

Can I add entries to /vendor/build.prop ?
And how can I do it, (what do I have to change in tweakprop.sh)

 

[christian.arvin]

Can I add entries to /vendor/build.prop ?
And how can I do it, (what do I have to change in tweakprop.sh)

You can, you need to modify OP's codes
Find the line pointing to

build=/system/build.prop

Change it to

build=/system/vendor/build.prop
Or
build=/vendor/build.prop

 

[DumiJ58]

You can, you need to modify OP's codes
Find the line pointing to

build=/system/build.prop

Change it to

build=/system/vendor/build.prop
Or
build=/vendor/build.prop

Thanks, for the response...
It worked...:good:

 

[TraderJack]

Should this work on a Pixel 3 XL?

I'm running twrp but am unable to get this (or any other build.prop flashable I've tried) to work.
I don't get any errors, and in my various tests I'm pretty sure that the file is getting copied and executed, but my build.prop never gets modified.
I think there might be some issue with it mounting the partition to access the file, but I don't get any errors and not sure how to troubleshoot.
Also, no backup is created - yet another reason I think it can't even access the file.

I'm using the "a" version so my tweap.prop is inside the zip.

 

[Miustone]

I think this isn't working since system-as-root (or Treble) is a thing. Is anyone aware how we can mount the newer Android Systems the right way? My actual Script looks like that:

#!/sbin/sh
set -e

VER=V21

OUTFD=$2
ui_print() {
    echo -n -e "ui_print $1\n" > /proc/self/fd/$OUTFD
    echo -n -e "ui_print\n" > /proc/self/fd/$OUTFD
}

ui_print "M.A.R.S. PROP $VER"

ex() {
 chmod 0644 "$build"
    ui_print "-ERROR: [email protected], SCRIPT ABORTED"
    exit 1
}

build=/system/build.prop
echo "" >> "$build"
name=mars.prop

for part in system data
do
    ui_print "-MOUNTING /$part"
    if mount | grep -q "/$part"
    then
        mount -o rw,remount "/$part" "/$part" && ui_print "-REMOUNTING /$part RW" || ex "-CAN'T WRITE ON /$part"
    else
        mount -o rw "/$part" && ui_print "-/$part MOUNTED RW" || ex "-CAN'T MOUNT /$part"
    fi
done

ui_print "-SETTING PERMISSIONS FOR $build"
chmod 0666 "$build"

ui_print "-INJECTING PROP FILE"
prop=$(find /sdcard* /storage* /ext* /tmp* -name $name -type f -follow 2>/dev/null | sed 1q)

test -s "$prop" && ui_print "-$prop FOUND WITH CONTENT" || ex "-CUSTOM FILE $name NOT FOUND OR EMPTY"

answer=$(sed "s/BACKUP=//p;d" "$prop")

backup() {
    echo "# BACKUP OF $build CREATED AT `date` MARS PROP PATCHER $ver" > "$1" || ex "-CAN'T WRITE BACKUP FILE $1" && \
    (cat "$build" >> "$1" && ui_print "-$build BACKED UP AT $1.")
}

case "$answer" in
y|Y|yes|Yes|YES)
    backup "${prop%/*}/${build##*/}.backup"
    ;;

n|N|no|No|NO)
    ;;

*)
    [[ -z "$answer" || ! -d $(dirname "$answer") ]] && ex "Given path is empty or parent directory does not exist" || backup "$answer"
    ;;
esac

ui_print "-READING $prop"

sed -r '/(^#|^ *$|^BACKUP=)/d;/(.*=.*|^\!|^\@.*\|.*|^\$.*\|.*)/!d' "$prop" | while read line
do
    if echo "$line" | grep -q '^\!'
    then
        entry=$(echo "${line#?}" | sed -e 's/[\/&]/\\&/g')
        grep -q "$entry" "$build" && (sed "/$entry/d" -i "$build" && ui_print "-ALL LINES CONTAINING \"$entry\" REMOVED")

    elif echo "$line" | grep -q '^\@'
    then
        entry=$(echo "${line#?}" | sed -e 's/[\/&]/\\&/g')
        var=$(echo "$entry" | cut -d\| -f1)
        app=$(echo "$entry" | cut -d\| -f2)
        grep -q "$var" "$build" && (sed "s/^$var=.*$/&$app/" -i "$build" && ui_print "-\"$app\" APPENDED TO VALUE OF \"$var\"")

    elif echo "$line" | grep -q '^\$'
    then
        entry=$(echo "${line#?}" | sed -e 's/[\/&]/\\&/g')
        var=$(echo "$entry" | cut -d\| -f1)
        new=$(echo "$entry" | cut -d\| -f2)
        grep -q "$var=" "$build" && (sed "s/^$var=.*$/$var=$new/" -i "$build" && ui_print "-VALUE \"$var\" CHANGED TO \"$new\"")

    else
        var=$(echo "$line" | cut -d= -f1)
        if grep -q "$var" "$build"
        then
            grep -q $(grep "$var" "$prop") "$build" || (sed "s/^$var=.*$/$line/" -i "$build" && ui_print "-VALUE \"$var\" OVERRIDDEN")
        else
            echo "$line" >> "$build" && ui_print "-ENTRY \"$line\" ADDED"
        fi
    fi
done

sed '/^ *$/d' -i "$build"

ui_print "-CLEANING"

chmod 0644 "$build" && ui_print "-ORIGINAL PERMISSION FOR $build RESTORED"

for part in system data
do
    umount "/$part" && ui_print "-/$part UNMOUNTED"
done

ui_print "-DONE"

Thanks in advance for any Help with that!