Date: Wed, 1 Apr 2009 22:53:06 +0200 From: Ed Schouten <ed@80386.nl> To: Steven Hartland <killing@multiplay.co.uk> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: How to increase the max pty's on Freebsd 7.0? Message-ID: <20090401205306.GO13393@hoeg.nl> In-Reply-To: <A48E38AADF784030A7496551F1416A3B@multiplay.co.uk> References: <A48E38AADF784030A7496551F1416A3B@multiplay.co.uk>
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Hi Steven, * Steven Hartland <killing@multiplay.co.uk> wrote: > How can I increase the maximum number or ptys available on FreeBSD 7.0? > > It seems that currently the machine is maxing out at 512 but there is > still loads of capacity left on the machine. > > Ideally would like to double at least the number of ttys available, > any help would be most appreciated. You can increase the maximum amount of PTYs by editing a lot of source files on your system. There is some good news: in -CURRENT we switched to Unix98-style PTYs (/dev/pts/%u). Right now the maximum amount of PTYs is limited to 1000 (0 to 999). We're currently limited to 7 characters (pts/999) because our utmp/ wtmp/lastlog files only reserve 8 bytes for the TTY name. If you're brave enough, you can increase UT_LINESIZE in include/utmp.h and MAXPTSDEVS in sys/kern/tty_pts.c. Be sure to recompile everything and to remove your utmp/wtmp/lastlog files. -- Ed Schouten <ed@80386.nl> WWW: http://80386.nl/
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