Date: Tue, 02 Oct 2007 14:05:03 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: "Steven Hartland" <killing@multiplay.co.uk> Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org Subject: Re: How to enable more than 256 pty's? Message-ID: <86abr1yb68.fsf@ds4.des.no> In-Reply-To: <012101c804e5$efa7e9c0$b6db87d4@multiplay.co.uk> (Steven Hartland's message of "Tue\, 2 Oct 2007 12\:18\:19 %2B0100") References: <001f01c80407$1358d490$b6db87d4@multiplay.co.uk> <00ab01c8040c$7c408160$b6db87d4@multiplay.co.uk> <012101c804e5$efa7e9c0$b6db87d4@multiplay.co.uk>
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"Steven Hartland" <killing@multiplay.co.uk> writes:
> Any one got any pointers on this, the machine we running this app on is o=
ver
> 90% idle so I really don't want to have to install a second machine just =
to
> workaround a limit on the number of pty's, surely there's a way to increa=
se
> this?
You need to change the way ptys are named in pty_create_slave() and
pty_clone() in sys/kern/tty_pty.c. Just changing names won't help as
the sequence is also hardcoded in pty_clone().
You also need to change grantpt(), openpty() and any other userland code
which has hardcoded knowledge of the naming scheme:
des@ds4 ~% gfs pqrsPQRS
src/sys/kern/tty_pty.c: static char *names =3D "pqrsPQRS";
src/sys/kern/tty_pty.c: * pts =3D=3D /dev/tty[pqrsPQRS][0123456789abcdefgh=
ijklmnopqrstuv]
src/sys/kern/tty_pty.c: * ptc =3D=3D /dev/pty[pqrsPQRS][0123456789abcdefgh=
ijklmnopqrstuv]
src/contrib/telnet/telnetd/sys_term.c: for (cp =3D "pqrsPQRS"; *cp; cp++) {
src/usr.sbin/ac/ac.c: strchr("pqrsPQRS", usr.=
ut_line[3]) !=3D 0 ||
src/lib/libutil/pty.c: for (cp1 =3D "pqrsPQRS"; *cp1; cp1++) {
src/lib/libc/stdlib/grantpt.c: #define PT_DEV1 "pqrsPQRS"
Alternatively, set kern.pts.enable to 1, and find and fix the
hang-on-close bug in the pts code (if it hasn't been fixed already)
DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
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