Return Output/Error as String?

[TheRealPSV]

Is there a way to get the output or error message as a String I can use in the application?
For example if I want to get the list of files inside the archive, using the below command, is there a way to get the list that is output?
7z l archive.zip
Right now the command just returns the error code Int, with no command output.

[huzongyao]

I don't if i can get the output, but I think may be you can modify the std::<<cout part to get the stream

[TheRealPSV]

Thanks for the response!

One other question, is it possible to pass a file into 7z directly, instead of typing a command? Like could I pass in a file descriptor, like in this StackOverflow post?

With newer versions of Android it's not possible to just send a path to the library, since we have to use the StorageAccessFramework to access files. If I try to access a file with this lib on Android Q, it returns an error about not having permissions.