Grant external SD-card write permissions as root?

[Wynadorn]

Is it possible to grant Termux write access to the external sd-card as root?
For example by adding the uid (u0_a425) to the sdcard_rw group.

When ssh'ing into termux I'd like to avoid using the root user.
I guess it'd be possible to chmod 777 the entire external sd, though I'd like to avoid it.

What's the propper way to set this up?
Is it even possible?

[Wynadorn]

I'm looking to do this because I have my phone's storage mounted though sshfs on my desktop.
So it'd be nice to have read/write access on the sd-card.

[Wynadorn]

In case anyone else wants to set up something similar in the furture

On my PC in wsl I run /usr/bin/mnt_termux which then runs sudo /etc/profile.d/su/mnt_termux.sh which runs
sshfs -v [email protected]:/data/data/com.termux/files/home /mnt/termux -p 8022 -o IdentityFile=/home/wyn/.ssh/id_rsa -o allow_other -o follow_symlinks -o reconnect 2> /dev/null &

I have this indirect construction so I can run sudo on mnt_termux.sh without password, cause /etc/profile.d/su/ is set to NOPASSWD in /etc/sudoers

[agnostic-apollo]

You can likely use bindfs from root-repo to remount external sd card with termux uid in termux home ~/external-sd.

Check Storage Requirements section at the end of termux/termux-packages#7227 (comment)

[Wynadorn]

Very cool, ill give it ago

[Wynadorn]

all done!
sudo bindfs --map=0/10425:@0/@10425 "/storage/B8D7-217A/" "/data/data/com.termux/files/home/sdcard/"

such a nerdflex to take a photo and access instantly it under \\wsl.localhost\Debian\mnt\termux\sdcard\dcim on my desktop 😁