Date: Mon, 04 Jun 2001 21:43:55 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Jim Pirzyk <Jim.Pirzyk@disney.com> Cc: freebsd-arch@FreeBSD.ORG Subject: Re: sysctl interger type max Message-ID: <61282.991683835@critter> In-Reply-To: Your message of "Mon, 04 Jun 2001 12:36:18 PDT." <01060412361804.00744@snoopy>
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In message <01060412361804.00744@snoopy>, Jim Pirzyk writes:
>On Monday 04 June 2001 12:26 pm, Poul-Henning Kamp wrote:
>> In message <01060412242703.00744@snoopy>, Jim Pirzyk writes:
>> >In sysctl(8), you can set an integer type, but the max value
>> >an int can be is 2 * N-1 where N is the size of int. This leads
>> >to a problem when trying to set kern.hostid and the number is
>> >greater that 2GB on an IA32 system. So my question is should
>> >CTLTYPE_INT be treated as a long or some other larger numeric
>> >number? Or should we declare some CLTYPE_UINT type?
>>
>> We do have an SYSCTL_UINT these days.
>
>Yes for establishing the oid in the kernel, but sysctl command
>line is limited to 2 * 31 bits even if the variable is set to
>CLTYPE_{UINT|LONG|ULONG}. This means you cannot set the variables
>to a possible range of values.
Then sysctl(8) is obviously broken...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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