On Fri, Aug 9, 2013 at 11:29 PM, Andres Perera <andre...@zoho.com> wrote:
> On Thu, Aug 8, 2013 at 6:35 AM, Nguyễn Thái Ngọc Duy <pclo...@gmail.com> 
> 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
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