add optional access to external SD card from android app [answered]

Great, it works.

Now we need some solution without the need for devel-su.

Yeah, maybe in a future software update...

Unfortunately, it seems each reboot erase these folder permissions... :/ I'm looking for a more permanent fix

I just added in /usr/sbin/mount-sd.sh the following line :

chmod 755 /run/user/100000

after

            mount $SDCARD $MNT

It works fine but it's quite ugly...

I did it without editing system script:

1. Create this script and put it somewhere in the /usr/share/sdcard-symlink

#!/bin/bash

status=$(df -h /run/user/100000/media/*|tail -1|awk '{print $1}') if [[ "$status" == "tmpfs" ]]; then : else octal=$(stat -c "%a %n" /run/user/100000|awk '{print $1}') if [[ "$octal" == "755" ]]; then : else chmod 755 /run/user/100000 if [ -h /data/sdcard/SDcard_symlink ]; then : else ln -s /run/user/100000/media/sdcard /data/sdcard/SDcard_symlink fi fi fi

1. chmod 4755 /usr/share/sdcard-symlink/symlink.sh

2. Create service file, call it for example: symlinkboot.service and put it to /lib/systemd/system

[Unit] Description=Symlink boot After=mount-sd-onboot.service

[Service] Type=simple Environment="DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/100000/dbus/user_bus_socket" ExecStart=/usr/share/sdcard-symlink/symlink.sh

[Install] WantedBy=multi-user.target

1. systemctl enable symlinkboot.service

2. Now you can reboot and it will do the job ;) Or you can just install Nemo-symlink from: https://openrepos.net/content/schturman/nemo-symlink#comment-2176

I don't see /usr/share/sdcard-symlink, just /usr/share/ with a lot of directories. Should I create a script? How does it need to be named? Or should a script be edited, and if so, which script?