Procs

proc getgrgid(gid: int): tuple[gr_name, gr_passwd: string, gr_gid: int,
                               gr_mem: seq[string]] {.
    ...raises: [Exception, ValueError, OSError, IOError, EOFError, KeyError],
    tags: [RootEffect].}

proc getgrnam(name: string): tuple[gr_name, gr_passwd: string, gr_gid: int,
                                   gr_mem: seq[string]] {.
    ...raises: [Exception, ValueError, OSError, IOError, EOFError, KeyError],
    tags: [RootEffect].}

proc getgrall(): seq[tuple[gr_name, gr_passwd: string, gr_gid: int,
                           gr_mem: seq[string]]] {.
    ...raises: [Exception, ValueError, OSError, IOError, EOFError, KeyError],
    tags: [RootEffect].}