__argz_next (char *argz, size_t argz_len, const char *entry)
__argz_next (const char *argz, size_t argz_len, const char *entry)
__argz_next (char *argz, size_t argz_len, const char *entry){  if (entry)    {      if (entry < argz + argz_len)	entry = strchr (entry, '\0') + 1;      return entry >= argz + argz_len ? NULL : (char *) entry;    }  else    if (argz_len > 0)      return argz;    else      return NULL;}