Frank Li schrieb:
> int start_command(struct child_process *cmd)
> {
> int need_in, need_out, need_err;
> int fdin[2], fdout[2], fderr[2];
> int failed_errno = failed_errno;
>
> I have not found failed_errno as global variable.
> failed_errno = failed_errno means nothing.
This is a commonly used idiom to avoid an (incorrect) compiler warning
about an uninitialized variable.
Strictly speaking, I think that you are right by saying "means nothing"
because the use of the uninitialized variable invokes undefined behavior
(and for this reason, I dislike this construct), but in practice it will
not make a difference.
-- Hannes
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html