util.py 文件源码

def _setgroups_until_success(l):
        while(1):
            # NASTY NASTY HACK (but glibc does it so it must be okay):
            # In case sysconfig didn't give the right answer, find the limit
            # on max groups by just looping, trying to set fewer and fewer
            # groups each time until it succeeds.
            try:
                setgroups(l)
            except ValueError:
                # This exception comes from python itself restricting
                # number of groups allowed.
                if len(l) > 1:
                    del l[-1]
                else:
                    raise
            except OSError, e:
                if e.errno == errno.EINVAL and len(l) > 1:
                    # This comes from the OS saying too many groups
                    del l[-1]
                else:
                    raise
            else:
                # Success, yay!
                return