proc wait(): tuple[pid: int, status: int] {....raises: [], tags: [], forbids: [].}

proc wait3(options: int): tuple[pid: int, status: int, rusage: struct_rusage] {.
    ...raises: [], tags: [], forbids: [].}

proc wait4(pid: int; options: int): tuple[pid: int, status: int,
    rusage: struct_rusage] {....raises: [], tags: [], forbids: [].}

proc waitpid(pid: int; options: int): tuple[pid: int, status: int] {....raises: [],
    tags: [], forbids: [].}

proc waitstatus_to_exitcode(status: int): int {....raises: [], tags: [],
    forbids: [].}

proc WCOREDUMP(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WEXITSTATUS(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WIFCONTINUED(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WIFEXITED(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WIFSIGNALED(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WIFSTOPPED(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WSTOPSIG(status: int): bool {....raises: [], tags: [], forbids: [].}

proc WTERMSIG(status: int): bool {....raises: [], tags: [], forbids: [].}