cvs commit: src/sys/kern tty_pts.c

Robert Watson rwatson at
Sat Apr 29 13:16:51 UTC 2006

On Fri, 28 Apr 2006, Robert Watson wrote:

>  Modified files:
>    sys/kern             tty_pts.c
>  Log:
>  Also check use_pty in the ptmx clone lookup; this means that when ptmx
>  support is turned off using the sysctl, we no longer even allow the
>  ptmx device to be looked up.
>  Foot provided by:       peter

This should help people running applications that directly test for /dev/ptmx 
rather than using openpty() to allow the operating system to provide a pty via 
the preferred mechanism.  Obviously, it won't help with applications that 
either don't interact well with the new pts code or with bugs in the new pts 
code, but it means the frob works a bit better in the event that you have pts 

My leaning is to make pts the default pty implementation in FreeBSD 7.0, and 
to switch the default setting to "1" for enabling pts's sometime in the next 
month or two.  So if you tried it out, ran into a bug, and then decided not to 
run with it any more, now is a good time to figure out why it didn't work :-).

There are also, apparently, a number of devfs bugs that are floating around 
which pts does a good job at triggering as it creates and destroys device 
nodes fairly frequently.

Robert N M Watson

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