Re: [PATCH v4] gc: reject if another gc is running, unless --force is given

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On Fri, Aug 9, 2013 at 11:29 PM, Andres Perera <andres.p@xxxxxxxx> wrote:
> On Thu, Aug 8, 2013 at 6:35 AM, Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> wrote:
>> +       uintmax_t pid;
>
> pid_t is always an signed type, therefore unintmax_t does not make
> sense as a catch all value

I only catch real process id. In practice we don't have processes with
negative pid_t, do we? I can't find any document about this, but at
least waitpid seems to treat negative pid (except -1) just as an
indicator while the true pid is the positive counterpart.

> fork() returns -1 on failure, and its return type is pid_t. i don't
> know what fantasy unix system has an unsigned pid_t
-- 
Duy
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