How can I use `if` in an adb run-as command?

Question

I want to check if there is a file in an Android app's private storage through adb, so I have to use run-as <packagename> in the command.

But it does not even let me use the if statement:

adb exec-out "run-as myPackage "if true; then echo HELLO; fi""

gives run-as: exec failed for if: Permission denied .

adb exec-out "if true; then echo HELLO; fi"

(without the run-as ) gives: HELLO , as expected.

How can I use the if statement in a run-as command?

Answer 1

run-as seems to be not smart enough to understand that whole block, it expects an executable.

adb -d exec-out run-as myPackage sh -c "if true; then echo HELLO; fi"

sh is smart enough.