[patch] have rtprio check that arguments are numeric; change atoi to strtol

[Giorgos Keramidas]

On Tue, 4 Jan 2011 08:58:48 -0800, Garrett Cooper <yanegomi at gmail.com> wrote:
>>>> +	errno = 0;
>>>> +	res = strtol(str, &endp, 10);
>>>> +	if (errno != 0 || endp == str || *endp != '\0')
>>>> +		err(1, "%s shall be a number", errname);
>>>
>>> Small nit, maybe use 'must' instead of 'shall'.
>>
>> it seems at some point there has been a massive usage of the term
>> 'shall' in manual pages, which people tried to get rid of. hence the
>> 'usr/share/examples/mdoc/deshallify.sh' script.
>
> I know shall is used widely by opengroup when describing definitions
> and interfaces in the POSIX standards, but the connotation in English
> is very squishy, so I agree with John that must would be better.
>
> BTW, only if errno was non-zero would using err(3) be
> logical. Otherwise it will just produce noise :).

That's a good point.  I think we should change err() to errx() there.