Date: Wed, 27 Aug 2008 13:46:23 +0200 From: Ollivier Robert <roberto@keltia.freenix.fr> To: freebsd-current@freebsd.org Subject: Re: Enormous utmp since mpsafetty Message-ID: <20080827114623.GA52927@keltia.freenix.fr> In-Reply-To: <20080827132141.593e728d@peedub.jennejohn.org> References: <20080826124335.GD3305@carrot.paeps.cx> <48B416E7.70905@163.com> <20080827091255.GH3305@carrot.paeps.cx> <20080827132141.593e728d@peedub.jennejohn.org>
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According to Gary Jennejohn:
> There are many more pseudo-ttys in /etc/ttys now. AFAIK utmp allocates
> an entry for every one of them at startup.
utmp concepts are ancient. It is indexed by the tty/pty number so can grow
rather large but it should be a sparse one too. I remember talks about
replacing it with something a bit more modern. Backward compatibility is
assured through login(3) although it would break programs digging in the
utmp file itself. SVR4 had utmp/utmpx and setutline/getutline BTW...
cf. sessreg(1)
System V has a better interface to utmp than BSD; it dynamically allo-
cates entries in the file, instead of writing them at fixed positions
indexed by position in /etc/ttys.
--
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr
Darwin sidhe.keltia.net Version 9.2.0: Tue Feb 5 16:13:22 PST 2008; i386
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