fn set_pid()

in src/platform_impl/linux/x11/window.rs [458:496]
37 lines of code
3 McCabe index (conditional complexity)

    fn set_pid(&self) -> Option<util::Flusher<'_>> {
        let pid_atom = unsafe { self.xconn.get_atom_unchecked(b"_NET_WM_PID\0") };
        let client_machine_atom = unsafe { self.xconn.get_atom_unchecked(b"WM_CLIENT_MACHINE\0") };
        unsafe {
            // 64 would suffice for Linux, but 256 will be enough everywhere (as per SUSv2). For instance, this is
            // the limit defined by OpenBSD.
            const MAXHOSTNAMELEN: usize = 256;
            // `assume_init` is safe here because the array consists of `MaybeUninit` values,
            // which do not require initialization.
            let mut buffer: [MaybeUninit<c_char>; MAXHOSTNAMELEN] =
                MaybeUninit::uninit().assume_init();
            let status = libc::gethostname(buffer.as_mut_ptr() as *mut c_char, buffer.len());
            if status != 0 {
                return None;
            }
            ptr::write(buffer[MAXHOSTNAMELEN - 1].as_mut_ptr() as *mut u8, b'\0'); // a little extra safety
            let hostname_length = libc::strlen(buffer.as_ptr() as *const c_char);

            let hostname = slice::from_raw_parts(buffer.as_ptr() as *const c_char, hostname_length);

            self.xconn
                .change_property(
                    self.xwindow,
                    pid_atom,
                    ffi::XA_CARDINAL,
                    util::PropMode::Replace,
                    &[libc::getpid() as util::Cardinal],
                )
                .queue();
            let flusher = self.xconn.change_property(
                self.xwindow,
                client_machine_atom,
                ffi::XA_STRING,
                util::PropMode::Replace,
                &hostname[0..hostname_length],
            );
            Some(flusher)
        }
    }