ref: 68af611454400ea7ef8617c7c8b35d817e9caa50
dir: /proc.c/
static int
p9_rfork(lua_State *L)
{
lua_Integer flags;
int r;
flags = luaL_checkinteger(L, 1);
if((r = rfork(flags)) == -1)
lerror(L, "rfork");
lua_pushinteger(L, r);
return 1;
}