buildid 1.0.4

Examine the currently running executable to get its build-id or LC_UUID
Documentation 
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use core::mem::MaybeUninit;

extern "C" {
    fn build_id__get(build_id: *mut *const u8, len: *mut usize) -> core::ffi::c_int;
}

pub fn build_id() -> Option<&'static [u8]> {
    let mut b = MaybeUninit::<*const u8>::uninit();
    let mut l = MaybeUninit::<usize>::uninit();
    let r = unsafe { build_id__get(b.as_mut_ptr(), l.as_mut_ptr()) };

    match r {
        0 => None,
        1 => {
            let b = unsafe { b.assume_init() };
            let l = unsafe { l.assume_init() };

            Some(unsafe { core::slice::from_raw_parts(b, l) })
        }
        r => {
            log::error!("build_id__get returned error: {}", r);
            None
        }
    }
}