Re: How to increase the max pty's on Freebsd 7.0?
On Wed, Apr 08, 2009 at 12:43:53PM +0100, Max Laier wrote:
> On Wednesday 08 April 2009 13:25:39 Bernd Walter wrote:
> > On Thu, Apr 02, 2009 at 08:10:03AM +0200, Ed Schouten wrote:
> > > * Paul Schenkeveld wrote:
> > > > Or change 'pts' to, for example, 'pt' so without changing utmp and
> > > > related stuff we'll have space for a four digit pty number.
> > >
> > > I've noticed lots of apps already misbehave because of the pty(4) ->
> > > pts(4) migration. I guess using a new naming scheme would totally break
> > > stuff. There are lots of apps that do things like:
> > >
> > > if (strncmp(tty, "tty", 3) != 0 && strncmp(tty, "pts/", 4) != 0)
> > > printf("Not a valid pseudo-terminal!\n");
> > >
> > > But those are just workarounds. Our utmp format is broken anyway. It's
> > > not just UT_LINESIZE that's too small. I think we received many
> > > complaints from people who want to increase UT_HOSTSIZE as well.
> >
> > Well, UT_HOSTSIZE can't hold a full sized IPv6 address.
>
> RFC 1924 (still needs four more, but avoids ridiculously large UT_HOSTSIZE ;)
It doesn't handle scope information ;-)
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Re: How to increase the max pty's on Freebsd 7.0?
On Wednesday 08 April 2009 13:25:39 Bernd Walter wrote:
> On Thu, Apr 02, 2009 at 08:10:03AM +0200, Ed Schouten wrote:
> > * Paul Schenkeveld wrote:
> > > Or change 'pts' to, for example, 'pt' so without changing utmp and
> > > related stuff we'll have space for a four digit pty number.
> >
> > I've noticed lots of apps already misbehave because of the pty(4) ->
> > pts(4) migration. I guess using a new naming scheme would totally break
> > stuff. There are lots of apps that do things like:
> >
> > if (strncmp(tty, "tty", 3) != 0 && strncmp(tty, "pts/", 4) != 0)
> > printf("Not a valid pseudo-terminal!\n");
> >
> > But those are just workarounds. Our utmp format is broken anyway. It's
> > not just UT_LINESIZE that's too small. I think we received many
> > complaints from people who want to increase UT_HOSTSIZE as well.
>
> Well, UT_HOSTSIZE can't hold a full sized IPv6 address.
RFC 1924 (still needs four more, but avoids ridiculously large UT_HOSTSIZE ;)
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Re: How to increase the max pty's on Freebsd 7.0?
On Thu, Apr 02, 2009 at 08:10:03AM +0200, Ed Schouten wrote:
> * Paul Schenkeveld wrote:
> > Or change 'pts' to, for example, 'pt' so without changing utmp and
> > related stuff we'll have space for a four digit pty number.
>
> I've noticed lots of apps already misbehave because of the pty(4) ->
> pts(4) migration. I guess using a new naming scheme would totally break
> stuff. There are lots of apps that do things like:
>
> if (strncmp(tty, "tty", 3) != 0 && strncmp(tty, "pts/", 4) != 0)
> printf("Not a valid pseudo-terminal!\n");
>
> But those are just workarounds. Our utmp format is broken anyway. It's
> not just UT_LINESIZE that's too small. I think we received many
> complaints from people who want to increase UT_HOSTSIZE as well.
Well, UT_HOSTSIZE can't hold a full sized IPv6 address.
--
B.Walter http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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Re: How to increase the max pty's on Freebsd 7.0?
Yep that's what I came up with after looking though the code thanks for the link though, always good to get confirmation that I didn't miss something. Regards Steve - Original Message - From: "John Baldwin" On Wednesday 01 April 2009 1:55:12 pm Steven Hartland 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. http://people.freebsd.org/~jhb/patches/pty_1152.patch This might require 7.1 instead of 7.0 as I simplified the pty allocation code in <= 7.x so that it was easier to add new ones. This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmas...@multiplay.co.uk. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
On Wednesday 01 April 2009 1:55:12 pm Steven Hartland 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. http://people.freebsd.org/~jhb/patches/pty_1152.patch This might require 7.1 instead of 7.0 as I simplified the pty allocation code in <= 7.x so that it was easier to add new ones. -- John Baldwin ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
0n Wed, Apr 01, 2009 at 10:53:06PM +0200, Ed Schouten wrote: 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). Thanks for the confirmation I've managed to patch our local source tree to increase this to 1024. Seems the last patch to raise to 512 has one bug so fixed that while I was there. If anyone wants the patch set shout. Regards Steve This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmas...@multiplay.co.uk. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
Hi Alex, * Wilkinson, Alex wrote: > > 0n Wed, Apr 01, 2009 at 10:53:06PM +0200, Ed Schouten wrote: > > >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). > > What are "Unix98-style PTYs" ? Unix98-style PTYS is a name often given to implementations of pseudo-terminals that use a character device called /dev/ptmx to allocate a new pseudo-terminal. After /dev/ptmx has been opened, it will expose a new TTY in /dev/pts. The name of the TTY can be obtained using routines like ptsname(). Operating systems like Linux and Solaris use this as well. FreeBSD's pts(4) driver also has a /dev/ptmx character device, but it's just there for compatibility (Linux binary emulation, older -CURRENT libcs). The preferred way to allocate pseudo-terminals is to call posix_openpt(2). An advantage of the current design is that allocating pseudo-terminals can be done a lot more easily. On RELENG_[67] posix_openpt(3) is a libc routine that has to loop through devfs to search for the first unused pseudo-terminal. It also requires a set-uid utility (pt_chown) to change the ownership of the TTY: http://svn.freebsd.org/viewvc/base/stable/7/lib/libc/stdlib/grantpt.c?view=markup In -CURRENT the TTYs are allocated on demand with the proper permissions in place. -- Ed Schouten WWW: http://80386.nl/ pgpbZIg13TEfl.pgp Description: PGP signature
Re: How to increase the max pty's on Freebsd 7.0?
* Paul Schenkeveld wrote:
> Or change 'pts' to, for example, 'pt' so without changing utmp and
> related stuff we'll have space for a four digit pty number.
I've noticed lots of apps already misbehave because of the pty(4) ->
pts(4) migration. I guess using a new naming scheme would totally break
stuff. There are lots of apps that do things like:
if (strncmp(tty, "tty", 3) != 0 && strncmp(tty, "pts/", 4) != 0)
printf("Not a valid pseudo-terminal!\n");
But those are just workarounds. Our utmp format is broken anyway. It's
not just UT_LINESIZE that's too small. I think we received many
complaints from people who want to increase UT_HOSTSIZE as well.
--
Ed Schouten
WWW: http://80386.nl/
pgpvuMfsX7ctx.pgp
Description: PGP signature
Re: How to increase the max pty's on Freebsd 7.0?
0n Wed, Apr 01, 2009 at 10:53:06PM +0200, Ed Schouten wrote: >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). What are "Unix98-style PTYs" ? -aW IMPORTANT: This email remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the CRIMES ACT 1914. If you have received this email in error, you are requested to contact the sender and delete the email. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
On Wed, Apr 01, 2009 at 11:08:35PM +0200, Ed Schouten wrote: > Hi Kostik, > > * Kostik Belousov wrote: > > Can we switch to %x ? Or even, use some radix encoding of the number, > > to allow alphabetical symbols too ? > > I guess that would break a lot of existing libraries. For example: older > RELENG_7/CURRENT libcs might still use TIOCGPTN. This ioctl just returns > a number that is just printed into a device name using "/dev/pts/%u" as > a format. I also suspect a lot of Linux/Solaris-minded software expects > the names to be in decimal form. Or change 'pts' to, for example, 'pt' so without changing utmp and related stuff we'll have space for a four digit pty number. -- Paul Schenkeveld ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
* Ed Schouten wrote: > I also thought about that, but the risks are probably too high. I think > it's better to just redesign our utmp/wtmp/lastlog system. I guess we > could do something like this: I forgot one step: > - Implement utmpx. At first utmpx should just be a set of wrappers > around utmp/wtmp/lastlog. > - Migrate all applications to utmpx. - Remove ttyslot() and . > - Change the utmpx code to use some new fancy file format. -- Ed Schouten WWW: http://80386.nl/ pgpThQaEOytzg.pgp Description: PGP signature
Re: How to increase the max pty's on Freebsd 7.0?
Hi Kostik, * Kostik Belousov wrote: > Can we switch to %x ? Or even, use some radix encoding of the number, > to allow alphabetical symbols too ? I guess that would break a lot of existing libraries. For example: older RELENG_7/CURRENT libcs might still use TIOCGPTN. This ioctl just returns a number that is just printed into a device name using "/dev/pts/%u" as a format. I also suspect a lot of Linux/Solaris-minded software expects the names to be in decimal form. I also thought about that, but the risks are probably too high. I think it's better to just redesign our utmp/wtmp/lastlog system. I guess we could do something like this: - Implement utmpx. At first utmpx should just be a set of wrappers around utmp/wtmp/lastlog. - Migrate all applications to utmpx. - Change the utmpx code to use some new fancy file format. I think I can finish the first step before 8.0 if I start working on this one of these weeks. -- Ed Schouten WWW: http://80386.nl/ pgpJdd2GtY3g5.pgp Description: PGP signature
Re: How to increase the max pty's on Freebsd 7.0?
On Wed, Apr 01, 2009 at 10:53:06PM +0200, Ed Schouten wrote: > Hi Steven, > > * Steven Hartland 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. Can we switch to %x ? Or even, use some radix encoding of the number, to allow alphabetical symbols too ? pgpYSMuFFs3XB.pgp Description: PGP signature
Re: How to increase the max pty's on Freebsd 7.0?
Hi Steven, * Steven Hartland 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 WWW: http://80386.nl/ ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
Re: How to increase the max pty's on Freebsd 7.0?
I knew his sounded very familiar, seems I asked the same
question back in 2007 for 5.4 just it was capped at 256:
http://lists.freebsd.org/mailman/htdig/freebsd-hackers/2007-October/021852.html
I'm sure I also remember saying this limit had been removed in 7.x
but looking in the source for pqrsPQRS it seems there are several
places where this still hard coded:-
contrib/telnet/telnetd/sys_term.c: for (cp = "pqrsPQRS"; *cp; cp++) {
lib/libc/stdlib/grantpt.c:#define PTY_DEV1"pqrsPQRSlmnoLMNO"
lib/libutil/pty.c: for (cp1 = "pqrsPQRSlmnoLMNO"; *cp1; cp1++) {
sys/kern/tty_pty.c:static const char names[] = "pqrsPQRSlmnoLMNOtuvwTUVWxyzXYZ";
sys/kern/tty_pty.c: * pts ==
/dev/tty[pqrsPQRSlmnoLMNO][0123456789abcdefghijklmnopqrstuv]
sys/kern/tty_pty.c: * ptc ==
/dev/pty[pqrsPQRSlmnoLMNO][0123456789abcdefghijklmnopqrstuv]
usr.sbin/ac/ac.c: strchr("pqrsPQRS",
usr.ut_line[3]) != 0 ||
So the questions are:-
1. Is the fix to this still to just to update these settings?
2. Is there any significance to the upper case lower case thing?
3. Are there any other restrictions on the letters that can be used?
- Original Message -
From: "Steven Hartland"
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.
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.
In the event of misdirection, illegible or incomplete transmission please
telephone +44 845 868 1337
or return the E.mail to postmas...@multiplay.co.uk.
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