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I have my chroot environment setup (Alpine Linux) in /sdcard/alpine. I try running my chroot with the following commands:
su
chroot alpine /bin/busybox
(busybox is the cli of Alpine)
I get the following error:
chroot: exec /bin/busybox: Permission denied.
How can I fix this?
My device specs:
Google Pixel XL (marlin)
Android 9.0
Rooted (obviously) with Magisk
Binaries can't be executed on /sdcard because it's an emulated filesystem with fixed file permissions, mounted with noexec mount option. Create alpine directory on some other filesystem e.g. /data:
~# mkdir -p /data/local/tmp/alpine/bin
Place your executable in newly created directory and do chroot:
~# cd /data/local/tmp
~# chmod 0755 alpine/bin/busybox
~# chroot alpine /bin/busybox sh
This will drop you to a root shell (UID 0) with changed root (/).
/data, the OP might be able to perform the whole procedure there.
– Grimoire
Sep 25 '19 at 0:56
