Commit Graph

152 Commits

Author SHA1 Message Date
christos cf6014f0ed use VREAD instead of VWRITE, this ioctl is used to redirect console output. 2003-04-10 22:35:00 +00:00
christos c4d28a0983 PR/732: Matt Green: TIOCCONS should work if the user owns /dev/console. 2003-04-10 22:05:57 +00:00
dsl 9be8ac5294 Alternative pid/proc allocater, removes all searches associated with pid
lookup and allocation, and any dependency on NPROC or MAXUSERS.
NO_PID changed to -1 (and renamed NO_PGID) to remove artificial limit
on PID_MAX.
As discussed on tech-kern.
2003-03-19 11:36:32 +00:00
christos e2b7a1ed43 Add a ttyprintf_nolock() to be called when we are printing the ttyinfo
stuff, since we already have the lock.
Adjust tputchar so that it does not lock, when NOLOCK is passed in flags.
2003-02-17 22:23:14 +00:00
pk 9d74642196 XXX ttioctl(): some drivers call back on us from t_param(), so delay acquiring
tty spin lock until after t_param() returns.

Require t_param() to unlock upon callback?
2003-02-06 12:21:21 +00:00
pk bb52ffdf64 Make the tty subsystem MP-safe..
..as far as mere mortals are able to, since this code illustrates the finest
points that Italian haute cuisine has to offer.
2003-02-05 15:49:02 +00:00
simonb 81b473285b Make the char_type array "unsigned char" since we stuff values > 0x80
into it.
2003-01-19 23:07:32 +00:00
thorpej e0d8d366df Merge the nathanw_sa branch. 2003-01-18 10:06:22 +00:00
christos e22906f6d0 si_ -> sel_ to avoid conflicts with siginfo. 2002-11-26 18:44:34 +00:00
jdolecek e0cc03a09b merge kqueue branch into -current
kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
2002-10-23 09:10:23 +00:00
gehenna 77a6b82b27 Merge the gehenna-devsw branch into the trunk.
This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

	device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
  by using this grammer.

- Added the new naming convention.
  The name of the device switch must be <prefix>_[bc]devsw for auto-generation
  of device switch tables.

- The backward compatibility of loading block/character device
  switch by LKM framework is broken. This is necessary to convert
  from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
  We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
  the LKM framework will refer it to assign device major number dynamically.
2002-09-06 13:18:43 +00:00
matt 48bbf5f234 Use the queue macros from <sys/queue.h> instead of referring to the queue
members directly.  Use *_FOREACH whenever possible.
2002-09-04 01:32:31 +00:00
thorpej d2f6f092f9 Avoid signed/unsigned comparison warnings from GCC 3.3. 2002-08-26 01:17:18 +00:00
jdolecek e462e316fb Make sure repeated TIOCSCTTY doesn't corrupt session hold count.
Fixes kern/17382 by David Laight.
2002-07-21 20:43:53 +00:00
enami e54e7305a2 - Fix more and more white space nits.
- ANSIfy the last K&R function definition in this file.
2002-05-02 13:38:57 +00:00
simonb b0b78e1e37 Fix a white-space nit. 2002-04-20 06:04:35 +00:00
christos 7d930e8572 Use SESSHOLD and SESSRELE consistently.
Add SESSHOLD and SESSRELE to the t_session, so that we don't have dangling
references [inspired by OpenBSD].
2002-04-12 17:02:33 +00:00
itohy ab5fe01c20 Print ttyinfo *before* (not after) sending SIGINFO to processes.
This generates more useful information of a process who catches SIGINFO,
rather than always printing "runnable" (the process is marked runnable
because of the signal).
Inspired by the behavior of BSD/OS.
2002-03-25 04:26:43 +00:00
atatat 31144d9976 Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for
indicating an unhandled "command".  ERESTART is -1, which can lead to
confusion.  ERESTART has been moved to -3 and EPASSTHROUGH has been
placed at -4.  No ioctl code should now return -1 anywhere.  The
ioctl() system call is now properly restartable.
2002-03-17 19:40:26 +00:00
thorpej a180cee23b Pool deals fairly well with physical memory shortage, but it doesn't
deal with shortages of the VM maps where the backing pages are mapped
(usually kmem_map).  Try to deal with this:

* Group all information about the backend allocator for a pool in a
  separate structure.  The pool references this structure, rather than
  the individual fields.
* Change the pool_init() API accordingly, and adjust all callers.
* Link all pools using the same backend allocator on a list.
* The backend allocator is responsible for waiting for physical memory
  to become available, but will still fail if it cannot callocate KVA
  space for the pages.  If this happens, carefully drain all pools using
  the same backend allocator, so that some KVA space can be freed.
* Change pool_reclaim() to indicate if it actually succeeded in freeing
  some pages, and use that information to make draining easier and more
  efficient.
* Get rid of PR_URGENT.  There was only one use of it, and it could be
  dealt with by the caller.

From art@openbsd.org.
2002-03-08 20:48:27 +00:00
simonb bc7301d415 nlinesw is already declared in <sys/conf.h>. 2002-03-04 02:32:58 +00:00
christos 980af1007c Andrew Brown found that we overflowed all cases in the TTLINEDNAMELEN.
ouch.
2002-02-08 18:36:53 +00:00
simonb bfc71f3c10 Add sysctls to read tk_{nin,nout,cancc,rawcc} (under a kern.tkstat node).
"extern" those variables in <sys/dkstat.h>, and add declarations for them
in sys/tty.c
2002-01-28 02:06:02 +00:00
lukem adc783d537 add RCSIDs 2001-11-12 15:25:01 +00:00
scw 2963ff5c58 Add `l_poll' to `struct linesw' and provide an xxxpoll() entry point
in each tty driver to indirect through it.

This allows tty line-disciplines to handle poll(2) system calls.
2001-05-02 10:32:08 +00:00
enami 2ceebb6c0e Remove unnecessary test of tp->t_linesw against NULL; they are results
of confusion while correcting compilation error after t_line is
replaced with t_linesw.
2001-03-31 00:35:21 +00:00
lukem b4e2b14fe6 convert to ANSI KNF 2001-03-22 04:52:25 +00:00
jdolecek e9e91a0fb5 split off thread specific stuff from struct sigacts to struct sigctx, leaving
only signal handler array sharable between threads
move other random signal stuff from struct proc to struct sigctx

This addresses kern/10981 by Matthew Orgass.
2000-12-22 22:58:52 +00:00
enami c4c6285008 Don't allow t_linesw to be NULL. 2000-11-15 01:47:14 +00:00
thorpej e39f7bbe1c NBPG -> PAGE_SIZE 2000-11-14 22:16:38 +00:00
jdolecek e8e4da6b87 add new function sigismasked(), which checks whether passed signal
is ignored or masked by the process, and use it appropriately
instead of directly checking p->p_sigmask and p->p_sigignore
2000-11-05 15:37:09 +00:00
eeh d85adca51f Make line disciplines modular so they can be added or removed dynamically. 2000-11-01 23:51:38 +00:00
mrg 32aa199ccf remove include of <vm/vm.h> 2000-06-27 17:41:07 +00:00
thorpej 8964c35eca Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor.  Test against SONPROC as appropriate rather than
combinations of SRUN and curproc.  Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.
2000-05-26 00:36:42 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00
kleink 2e68f6172e Cast timeval members to types we know the printf conversions of. 2000-03-28 18:39:03 +00:00
thorpej b667a5a357 New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
  resource allocation.
- Insertion and removal of callouts is constant time, important as
  this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.
2000-03-23 06:30:07 +00:00
tron d5442d74c5 Fix NULL pointer access. Patch supplied by Dave Huang in PR kern/8055. 1999-07-24 15:10:02 +00:00
thorpej 2715b812d1 Rework the process exit path, in preparation for making process exit
and PID allocation MP-safe.  A new process state is added: SDEAD.  This
state indicates that a process is dead, but not yet a zombie (has not
yet been processed by the process reaper).

SDEAD processes exist on both the zombproc list (via p_list) and deadproc
(via p_hash; the proc has been removed from the pidhash earlier in the exit
path).  When the reaper deals with a process, it changes the state to
SZOMB, so that wait4 can process it.

Add a P_ZOMBIE() macro, which treats a proc in SZOMB or SDEAD as a zombie,
and update various parts of the kernel to reflect the new state.
1999-07-22 18:13:36 +00:00
simonb 5d8b1ef3e4 g/c REAL_CLISTS. 1999-04-25 02:56:26 +00:00
mycroft fb526e055c Substantial signal handling changes:
* Increase the size of sigset_t to accomodate 128 signals -- adding new
  versions of sys_setprocmask(), sys_sigaction(), sys_sigpending() and
  sys_sigsuspend() to handle the changed arguments.
* Abstract the guts of sys_sigaltstack(), sys_setprocmask(), sys_sigaction(),
  sys_sigpending() and sys_sigsuspend() into separate functions, and call them
  from all the emulations rather than hard-coding everything.  (Avoids uses
  the stackgap crap for these system calls.)
* Add a new flag (p_checksig) to indicate that a process may have signals
  pending and userret() needs to do the full (slow) check.
* Eliminate SAS_ALTSTACK; it's exactly the inverse of SS_DISABLE.
* Correct emulation bugs with restoring SS_ONSTACK.
* Make the signal mask in the sigcontext always use the emulated mask format.
* Store signals internally in sigaction structures, rather than maintaining a
  bunch of little sigsets for each SA_* bit.
* Keep track of where we put the signal trampoline, rather than figuring it out
  in *_sendsig().
* Issue a warning when a non-emulated sigaction bit is observed.
* Add missing emulated signals, and a native SIGPWR (currently not used).
* Implement the `not reset when caught' semantics for relevant signals.

Note: Only code touched by the i386 port has been modified.  Other ports and
emulations need to be updated.
1998-09-11 12:50:05 +00:00
thorpej ad5e377513 Use the pool allocator and the "nointr" pool page allocator for tty
structures.
1998-09-01 00:23:28 +00:00
thorpej 7cc905f5c8 Add some braces to make egcs happy (ambiguous else warning). 1998-08-18 06:27:01 +00:00
perry 275d1554aa Abolition of bcopy, ovbcopy, bcmp, and bzero, phase one.
bcopy(x, y, z) ->  memcpy(y, x, z)
ovbcopy(x, y, z) -> memmove(y, x, z)
   bcmp(x, y, z) ->  memcmp(x, y, z)
  bzero(x, y)    ->  memset(x, 0, y)
1998-08-04 04:03:10 +00:00
perry 730baa7431 fix sizeofs so they comply with the KNF style guide. yes, it is pedantic. 1998-07-31 22:50:48 +00:00
mycroft 2bb5067e13 Move the code to wait for carrier on a tty into a common function, since it
depends only on device-independent state bits.
Implement SunOS-style `dialout' devices.
1998-03-22 00:55:37 +00:00
mycroft 2ada4b4af1 Replace TS_WOPEN with t_wopen, per mail on tech-kern. 1998-03-21 04:02:47 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
thorpej c1538fb038 Implement TIOCGSID. 1998-02-14 01:26:50 +00:00
kleink af9cc34b3c Add ONOCR and ONLRET output modes, from XPG4.2. 1998-02-13 21:53:44 +00:00