Why is the PREFIX variable pointing to "/data/data/com.termux/files/usr" instead of "/data/data/com.termux/files" ?

[sebma]

Hi,
I don't really understand why is the PREFIX variable pointing to /data/data/com.termux/files/usr instead of /data/data/com.termux/files :

$ echo $PREFIX
/data/data/com.termux/files/usr
$ ls -F /data/data/com.termux/files
bin/  data/  dev/  etc/  home/  lib/  proc/  root/  sbin/  share/  storage/  system/  tmp/  usr/  var/  vendor/

As the dev/, home/, proc/, root/, var/ directories are located in /data/data/com.termux/files instead of /data/data/com.termux/files/usr, should not the PREFIX variable be pointing to /data/data/com.termux/files instead ?

[thunder-coding]

I don't know what level of mess you have done to your Termux environment, but I want to tell you that /data/data/com.termux/files only contains teo directories namely usr/(equivalent to /usr) and home/(equivalent to /home).

The PREFIX environment variable points to /data/data/com.termux/files/usr

Probably you need a fresh reinstallation of Termux

[sebma]

@thunder-coding I think the termux-chroot tool created these directories via the proot command :

$ man proot | col -b | sed -n "/-r path/,/recommended/p"
       -r path, --rootfs=path
	      Use path as the new guest root file-system, default is /.

	      The specified path typically contains a Linux distribution where
	      all new programs will be confined.  The default rootfs is / when
	      none is specified, this makes sense when the bind mechanism is
	      used to relocate host files and directories, see the -b option
	      and the Examples section for details.

	      It is recommended to use the -R or -S options instead.
$ bash -x termux-chroot "echo WHATEVER" 2>&1 | grep -w exec.*proot | grep -o -- "-r [^ ]*"
-r /data/data/com.termux/files/usr/..
$

As you can see this proot call has -r path, --rootfs point to /data/data/com.termux/files/usr/.. that is to say /data/data/com.termux/files/.