越狱iPhone - root权限

Question

I would like to make an app that will manage some files on jailbroken devices like SMS, Notes .db, but I have problems with accessing such files. I've also made just to test my skills, similar application like your file manager and I could browse almost whole file system and access everything except some folders in /var/mobile/Library/. I get a list of contents of /var/mobile/Library but I get nothing in subdirectories like /var/mobile/Library/Notes/, /var/mobile/Library/SBSettings/, and btw what is most important in my case: /var/mobile/Library/SMS/ or /Notes/ displays nothing. Of course when I browse my device by SSH using Fugu I got everything and have access to everything (like chmod ie)

I would be great if you please give me some advices or source code what should I do to have, I guess the root's privileges, not only to access those files, but also change their permissions and names. I know how to make such operations using typically NSFileManager, but not on files from the directories above like /.../SMS/.

I've never developed an application that strictly need jailbroken device to perform the given tasks. I believe I will need some extra libraries? Is it true? Can I use Xcode or there is something else to develop such apps.

I would be very grateful!

Answer 1

Even when jailbroken, applications installed via Xcode or the App Store are still sandboxed. To get read-only access to the entire filesystem, an application has to be installed in /Applications/ instead of /var/mobile/Applications/ . To get write access to the entire filesystem, the application would additionally have to be owned by root and be flagged with the setuid mode