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272 Commits

Author SHA1 Message Date
Andrey A. Chernov
911b598f11 1. If some output still present at the end of ttywait, kill it. 
2. Even if ttywait() fails, call ttyflush(FREAD) in ttywflush.
This two fixes guarantee that queues are empty after calling ttywflush()
in any case
 1995-02-12 23:01:13 +00:00
Jordan K. Hubbard
3663f75c18 >32 PTY support 
Submitted by: Heikki Suonsivu <hsu@cs.hut.fi>
 1995-02-09 11:13:30 +00:00
Bruce Evans
a2d5fd1975 Disable bogus attempt to switch from the TS_ISOPEN state to the 
TS_WOPEN state when CLOCAL is toggled from on to off while there
is no carrier.  There is no way back, and with sio there is no way
forward either (TS_ISOPEN will never be set again for the current
open).  This bug was observed in 1.1 and was fixed in 1.1.5.
 1995-02-08 22:02:02 +00:00
Bruce Evans
c9c9e30a03 Increase the reserved clist space for the raw queue from 512 to TTYHOG. 
This might help avoid tty buffer overflows on loaded systems.
 1995-01-30 06:16:59 +00:00
Bruce Evans
4c5e4b09a7 Fix error handling for new TIOCSDRAINWAIT ioctl. 1995-01-06 14:56:42 +00:00
Andrey A. Chernov
33c38bd574 Fight against hanging modems: add timeout to ttywait. 
Reviewed by: Bruce
 1995-01-05 00:01:07 +00:00
Andrey A. Chernov
73a361245d Call d_stop in ttyflush not only for WRITE but for READ too 
Obtained from: 1.1.5.1
 1994-12-04 01:01:45 +00:00
Bruce Evans
d1a795a280 Fix cblock starvation bugs by reserving enough cblocks for minimal 
operation of each clist.  Limit the growth of each clist.  Clists
can only grow larger than the reserved minimum if there are free
cblocks in a shared pool.  The size of this pool is now fixed
(this could be improved).  The reserved and maximum sizes are more
carefully allocated for slip and ppp, depending on the mtu.  A maximum
MTU of 16384 is now enforced for ppp.
 1994-11-26 19:24:13 +00:00
Bruce Evans
ba77d4e47b Don't block for output in non-blocking mode if clists run out. 
Remove an unnecessary test (if the output queue is above high water
then it is nonempty).
 1994-11-26 18:54:25 +00:00
Bruce Evans
e8b7f39747 Return immediately from ttwrite() if the ttysleep()s that wait for 
a clist return with an error.  There are some clist starvation/deadlock
bugs elsewhere and killing clist hogs didn't help because the breaks
only exited from the inner loops.
 1994-11-01 22:23:29 +00:00
David Greenman
26305b211a Round down instead of up in 'kerninfo'/ctrl-T stats code. Incorrect output 
can result otherwise.

Submitted by:	John Dyson
 1994-10-23 06:18:13 +00:00
Andrey A. Chernov
61181d7df2 ttywait: check conditions again right after oproc 
Obtained from: (I know, but can't say :-)
 1994-10-15 17:59:02 +00:00
Poul-Henning Kamp
dcd01eb305 Cosmetics: added ()'s and fixed prinf-formats to make gcc silent. 1994-10-08 22:33:43 +00:00
David Greenman
824789192c Use tsleep() rather than sleep so that 'ps' is more informative about 
the wait.
 1994-10-06 21:07:04 +00:00
Andrey A. Chernov
d32198f15b Add VMIN/VTIME support 
Obtained from:  scratch :-)
 1994-10-03 01:12:18 +00:00
Poul-Henning Kamp
797f2d22f0 All of this is cosmetic. prototypes, #includes, printfs and so on. Makes 
GCC a lot more silent.
 1994-10-02 17:35:40 +00:00
David Greenman
9a500b2bcc Added support for TIOCSTAT ioctl. This allows shells that use raw/cbreak 
tty modes to process a control-T and do the right thing.
 1994-08-18 09:16:37 +00:00
David Greenman
3c4dd3568f Added $Id$ 1994-08-02 07:55:43 +00:00
David Greenman
9b970c5afa Allow for output processing routine to handle entire character buffer 
and thus not require a sleep/wakeup.
Reviewed by:
Submitted by:
 1994-08-01 10:42:26 +00:00
David Greenman
c16bf37e86 Added code to allocate and deallocate a number of cblocks on open/close of 
a tty.
Note that this might  conflict with the collateral use of TS_WOPEN, but
for the moment I can find no problems associated with this. (TS_WOPEN
will likely go away in the future anyway). This should be looked at
again in the future (the potential problem is that the cblock pool
may either run out or accumulate too many cblocks).
 1994-07-06 06:42:34 +00:00
Rodney W. Grimes
26f9a76710 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. 
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
 1994-05-25 09:21:21 +00:00
Rodney W. Grimes
df8bae1de4 BSD 4.4 Lite Kernel Sources 1994-05-24 10:09:53 +00:00