Hello Robert, * Robert Watson <[EMAIL PROTECTED]> wrote: > On Sat, 23 Aug 2008, Ed Schouten wrote: > >> Remove old BSD-style entries from /etc/ttys and increase pts(4) to 512. >> >> Because we now use pts(4)-style PTY's exclusively, there is no use for >> these entries in /etc/ttys. Right now the pts(4) entries only go from 0 >> to 255. Because we're going to touch these files anyway, increase the >> number to 511. > > Won't older pty-using binaries from 4.x/5.x/6.x/7.x running with compat > parts or old library versions still use old-style ptys, and hence need > them in /etc/ttys?
It really depends on what your definition of "need" is in this case. The reason why PTY's are listed in /etc/ttys, is to store login entries in /var/run/utmp. This means lastlog and wtmp are not affected. There is no need for an entry in /etc/ttys to be able to use a TTY and there is no guarantee an application using PTY's actually logs its usage in any logfile. The reason why I chose to remove the old devices and add some additional lines for pts(4), was because I was looking at a typical setup. The previous /etc/ttys was quite broken in two ways: - It contained 512 entries for a PTY naming scheme that (in RFC terms) SHOULD NOT be used on most common setups. - It contained 256 entries for a PTY naming scheme that we use right now. If we wanted to make everyone happy, I could have just added all pts(4) entries from 0 to 999, but that would have made /var/run/utmp at least 75 KB, which is a little big in my opinion. Rhis is why I, based on my expectations of the typical use case, decided to remove the pty(4) entries and extend the pts(4) ones. -- Ed Schouten <[EMAIL PROTECTED]> WWW: http://80386.nl/
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