Messages in this thread | | | Date | Tue, 29 Dec 2009 20:56:08 +0100 | From | Samuel Thibault <> | Subject | Re: what's the purpose of MAXHOSTNAMELEN? |
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Jeff Garzik, le Tue 29 Dec 2009 14:40:05 -0500, a écrit : > On 12/29/2009 02:19 PM, Robert P. J. Day wrote: > >arch/s390/include/asm/param.h:#define MAXHOSTNAMELEN 64 /* max > >length of hostname */ > > > > so lots of people define it but no one uses it. it *is* exported to > >user space in /usr/include/asm/param.h, but i still have no idea what > >it's for in user space. obsolete? > > According to RFC 1034, "Each node has a label, which is zero to 63 > octets in length"
That's for Internet networks. Other kinds of networks could implement more. It could make sense to restrict ourself to Internet standards, but we don't :)
> What is it used for in userspace, and why is it export from the kernel?
Gethostname, typically, but also all kinds of functions that provide a hostname. It's also quite often completely badly used, for instance for getnameinfo()...
You have Debian's list on http://unstable.buildd.net/buildd/hurd-i386_Failed.html
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