Function guest_dirfd_path 

pub fn guest_dirfd_path(fs: &Fs, pid: u32, dirfd: i32) -> Result<Vec<u8>, i32>

The guest path of dirfd itself, or of the tracee’s cwd for AT_FDCWD: what an empty path names in the calls that allow one (AT_EMPTY_PATH, and readlinkat always).

Arguments

• fs - Guest filesystem view.
• pid - Tracee thread id.
• dirfd - Descriptor number in the tracee, or libc::AT_FDCWD.