Function waitpid

src/backend/linux_raw/process/syscalls.rs:285–290

(
    pid: Option<Pid>,
    waitopts: WaitOptions,
)

#[inline]
pub(crate) fn waitpid(
    pid: Option<Pid>,
    waitopts: WaitOptions,
) -> io::Result<Option<(Pid, WaitStatus)>> {
    _waitpid(Pid::as_raw(pid), waitopts)
}

#[inline]
pub(crate) fn waitpgid(pgid: Pid, waitopts: WaitOptions) -> io::Result<Option<(Pid, WaitStatus)>> {