Function accessat

pub fn accessat<P: Arg, Fd: AsFd>(
    dirfd: Fd,
    path: P,
    access: Access,
    flags: AtFlags,
) -> Result<()>

faccessat(dirfd, path, access, flags)—Tests permissions for a file or directory.

On Linux before 5.8, this function uses the faccessat system call which doesn’t support any flags. This function emulates support for the AtFlags::EACCESS flag by checking whether the uid and gid of the process match the effective uid and gid, in which case the EACCESS flag can be ignored. In Linux 5.8 and beyond faccessat2 is used, which supports flags.

References

• POSIX
• Linux