I am trying to issue this command
adb shell "su -c echo 'boot-recovery' > /cache/recovery/command"
//OR//
adb shell "echo 'boot-recovery' > /cache/recovery/command"
outputs the same: /system/bin/sh: can't create /cache/recovery/command: Permission denied
I granted root permission for adb and i can run other commands with root normally like touch for example
I tried the command both ways when the file did and did not existed.
I tried checking for the existence of the file:
adb shell "if [ -f /cache/recovery/command ]; then echo "file found"; else echo "error"; fi"
it returned error even though the file does in fact exist
The Goal is to add a few lines to the recovery queue so the run the next time the device boots into recovery
Please correct me, I'm not so good at android command line, do I need to use a different command to achieve this goal?
More info: Android 8.1 (RR oreo) ... Magisk SU ... TWRP 3.2 (But need this to be compatible with as many android versions, recoveries, and su binaries as possbible .... I hope lol)