Function _setgroups_hack

celery/platforms.py:466–482

(groups)

def _setgroups_hack(groups):
    # :fun:`setgroups` may have a platform-dependent limit,
    # and it's not always possible to know in advance what this limit
    # is, so we use this ugly hack stolen from glibc.
    groups = groups[:]

    while 1:
        try:
            return os.setgroups(groups)
        except ValueError:  # error from Python's check.
            if len(groups) <= 1:
                raise
            groups[:] = groups[:-1]
        except OSError as exc:  # error from the OS.
            if exc.errno != errno.EINVAL or len(groups) <= 1:
                raise
            groups[:] = groups[:-1]


def setgroups(groups):