Sat Aug 22 00:17:33 BST 1998

	* Use TIOCINQ instead of FIONREAD in the STREAMS ioctl
	  handler.
	  -- Mike

	* Changed some stray KERN_ERRs to KERN_DEBUGs in ioctl.c
	  -- Mike

	* Added support for the "fat" IPC structures which use
	  32 bit uids, gids etc.
	  -- Mike


Fri Aug 21 20:26:34 BST 1998

	* Changed the CONFIG default to NOT support Xenix 286.
	  -- Mike

	* Somehow fchdir had been missed from the main iBCS call
	  map even though it had been added to the BSD map. Oops.
	  -- Mike


--------------------------------------------------------------------------
This is the point where the versions of iBCS for 2.0 and 2.1 kernels split
--------------------------------------------------------------------------


Mon May 18 22:49:56 BST 1998

	* Fixed xnx_rdchk() return value.
	  -- Mike

	* The serial number returned in the SCO utsname struct
	  can now be set with sco_serial="..." as a module
	  option. Some program apparently want to find a real,
	  believable serial number there. This should be documented
	  somewhere other than here I guess...
	  -- Mike


Mon May 18 22:03:49 BST 1998

	* A class 't' ioctl with no arg type stuff in the top
	  word is either an SVR4 tape ioctl a Coherent BSD-ish
	  termios ioctl.
	  -- Mike


Mon Feb  2 22:57:45 GMT 1998

	* Other relatively minor changes to allow compilation
	  under glibc (specifically 2.0.6 but it shouldn't
	  matter).
	  -- Mike

	* Added an explicit -I flag to search /usr/src/linux/include
	  since glibc doesn't necessarily require the kernel
	  includes to be symlinked under /usr/include.
	  -- Mike

	* The personality defaults in binfmt_coff should probably
	  select short inodes on the assumption that newer stuff
	  is likely to be built as ELF anyway. I hope.
	  -- Mike


Wed Nov 19 19:28:07 GMT/BST 1997

	* Attempt to work around problems with sign extension
	  when programs believe that the fs magic in a sysfs()
	  call is short rather than long.
	  -- Mike

	* Added IPPROTO_IP/SOL_IP option name mapping for
	  {get,set}sockopt. This is correct for SCO OS5 and
	  hopefully for other SYSV derived Unices. Note that
	  SCO OS5 ping still doesn't work because it uses an
	  unsigned char for the IP_TTL value whereas Linux
	  wants an int - and it objects to getting an error
	  return. Apparently POSIX 1003g says IP_TTL should
	  be an unsigned char so OS5, or at least its ping,
	  is at fault. This probably isn't worth hacking
	  around unless someone _really_ needs it.
	  -- Mike


Wed Nov 12 22:28:19 GMT/BST 1997

	* Added the SCO-ish syscall shortcut to the socksys
	  networking code.
	  -- Mike


Fri Nov  7 20:13:05 GMT/BST 1997

	* Oops, I installed the SCO signal tables in the old
	  personality mapping but forgot to create a specific
	  SCO personality using them.
	  -- Mike


Thu Nov  6 08:04:37 GMT/BST 1997

	* No, it really should be USR1 for URG under SCO, not
	  USR2. This is according to the SCO Network Programmer's
	  documentation. The previous problem was because
	  confusion between the SVR4 and SCO/SVR3 requirements
	  prevented a SCO program from registering a handler
	  for the right signal, I think.
	  -- Mike


Wed Nov  5 14:23:22 GMT/BST 1997

	* Created a new signal mapping for SCO and mapped
	  Linux SIGURG to SCO SIGUSR2. Also changed the
	  plain ibcs mapping for SIGURG back to IBCS_SIGURG.
	  Previously I had SIGURG mapped to SIGUSR1 for
	  what my subconscious says was a good reason but
	  I can't figure out where I got it from. The USR2
	  mapping is according to Peter Brueckner - and if
	  it works for him...
	  -- Mike


Wed Nov  5 09:14:27 GMT/BST 1997

	* Repair the STREAMS based socket code. The new socket
	  hashing in 2.0.30 and beyond means the old code no
	  longer works. We now delay replacing the fd with
	  a socket until the first read, write or ioctl. Since
	  the open has completed at this stage and the fd is
	  fully initialized we can then use dup() to do the
	  fd switch, which should always work. As a side effect
	  this allows us to auto-connect an SPX pipe to X :0
	  if the first operation is other than a single character
	  write - which should allow us to handle v. old SVR3
	  X programs side by side with their more modern, and
	  common, multi-SPX pipe descendants.
	    This does mean that some error returns from an
	  open of a TLI special file might be delayed until
	  the first operation, however a) these are unlikely
	  to occur (they are things like no such protocol)
	  and b) most opens of such files are hidden in
	  functions like t_open() anyway so if there is a
	  problem a simple fix to libnsl to check the first
	  ioctl is all that is needed.
	  -- Mike

	* sysfs() used to enumerate available filesystems seems
	  to be 0 based on Linux but 1 based on SYSV.
	  -- Mike


Sun Oct 12 00:18:33 GMT/BST 1997
	* Ioctls on the NFS pseudo device need to go via the
	  emulation code rather than the native ioctl handler.
	  -- Mike


Sat Aug 16 14:56:24 GMT/BST 1997

	* Changed the use of errno in a prototype in ibcs.h to
	  avoid possible conflict with an SMP errno definition
	  which could get inherited from an include file if we
	  aren't careful.
	  -- Mike


Sat Jul 12 01:00:00 GMT/BST 1997

	* Added Xenix locking() modes 5, 6, 7 as per patch from
	  David Bruce <admin@hulcote.com> (there were others
	  too). I rewrote it to be a bit cleaner but I haven't
	  tested it (it's late...). Some one will tell me I guess.
	  -- Mike

Fri Jul 11 22:27:13 GMT/BST 1997

	* Added more console ioctl traps to discourage programs
	  from trying to do funky stuff with the console without
	  logging unsupported ioctl messages.
	  -- Mike

	* sysfs() can, apparently, map an fs magic number to
	  an fs name. We do this outside the kernel sysfs()
	  because there seems no clean way to do it. We simply
	  have a list of known magic numbers hard coded :-(.
	  -- Mike

	* Implemented sysconfig(). This is appears to be the SVR4
	  forerunner to the POSIX sysconf().
	  -- Mike


Tue May 13 20:52:05 GMT/BST 1997

	* Hand off xmknod calls via ibcs_mknod so that we can
	  create a directory if that is what the flags imply.
	  I have not tested to see if xmknod is allowed to create
	  directories - I just noticed it in passing.
	  -- Mike

	* Added SCO's F_GETHFDO (get highest fd open) fcntl. This is
	  used by /bin/csh on SCO OS5 to save a few syscalls.
	  -- Mike


Tue May 13 00:10:09 GMT/BST 1997

	* More changes to handle long/short inode environments
	  plus more explanation in the code. Are we having fun yet?
	  -- Mike


Sat May 10 15:19:39 GMT/BST 1997

	* Added socketpair() to the socksys emulation. This is
	  as implemented by SCO OpenServer 5.
	  -- Mike

	* Change binfmt_coff.c to recognise programs compiled for
	  SCO OpenServer 5, programs compiled for SCO 3.2.4 and
	  programs compiled under SCO OpenServer 5 but with
	  compatibility for ODT3.0. Why? Well, sometimes we
	  should be giving long inodes in returns from getdents,
	  sometimes short inodes. We don't just want to mask
	  off the high part because that can lead to some
	  things becoming invisible. We don't want that.
	  -- Mike


Fri May  9 23:29:37 GMT/BST 1997

	* Added some more tape ioctls.
	  -- Mike


Wed Apr 16 23:12:37 GMT/BST 1997

	* Fix memory leaks in poll.c and change ENOMEM return
	  to EAGAIN.
	  -- Mike


Tue Mar 11 21:29:15 GMT/BST 1997

	* Add {get,set}rlimit to the SYSV personalities.
	  -- Mike


Fri Mar  7 21:04:24 GMT/BST 1997

	* Only build x286emul if EMU_X286 is enabled in CONFIG. There
	  are many insallations which appear to either not have the
	  a.out compiler support or have it installed incorrectly.
	  -- Mike


Tue Feb 18 22:04:39 GMT/BST 1997

	* Removed unnecessary and incorrect includes.
	  -- Mike


Wed Feb 12 22:03:13 GMT/BST 1997

	* Documentation updates for release.
	  -- Mike


Mon Feb 10 22:36:27 GMT/BST 1997

	* Dammit! The inode folding in stat() and getdents() was
	  out of step _again_ :-(.
	  -- Mike


Sun Jan  5 17:20:20 GMT/BST 1997

	* sysconf(_SC_CLK_TCK) should return the value of HZ.
	  -- Mike

	* Small clarification to README concerning shared libraries.
	  -- Mike

	* Removed the bit about UnixWare X binaries not working from
	  Doc/HINTS. Now we have STREAMS/TLI emulation this is no
	  longer true (and hasn't been for a while).
	  -- Mike


Sat Jan  4 19:31:26 GMT/BST 1997

	* If we open() something that is really a socket we close
	  it and reopen it using socket(), connect(). This allows
	  a Unix domain socket to look like a named pipe which
	  enables more SYSV X clients to connect to a local X
	  server using the local method (with suitable symlinks
	  to map the pathnames).
	  -- Mike


Fri Jan  3 22:39:15 GMT/BST 1997

	* Added a (simplistic) implementation of the I_CANPUT SVR4
	  STREAMS ioctl.
	  -- Mike

	* Changed CONFIG.i386 to note that a correct setting of SMP
	  is now necessary.
	  -- Mike


Wed Oct  2 16:28:39 GMT/BST 1996

	* Intercept mknod() and allow it to create directories. Linux
	  doesn't allow this but SYSV does. (What about BSD?)
	  -- Mike


Wed Oct  2 15:56:57 GMT/BST 1996

	* Separated out the spx connect code so we can support old,
	  single connection spx implementations once we know how to
	  recognise them.
	  -- Mike

Wed Oct  2 15:54:45 GMT/BST 1996

	* At some stage I add some binfmt_elf.c changes that were
	  made to the kernel ELF loader in some 2.0.x patch. I forget
	  which now but no one should be using the iBCS ELF loader
	  currently anyway.
	  -- Mike


Fri Aug 23 15:42:04 GMT/BST 1996

	* Moved svr4sig to the right place.
	  -- Mike

	* Moved error message strings to a separate file so they can
	  be shared by emulate.c and solaris.c.
	  -- Mike

	* CONFIG files now define ARCH to be the CPU architecture. This
	  is used to ensure that architecture specific files are only
	  used when necessary.
	  -- Mike

	* Changed the getdents routine in open.c to use the same
	  rules for folding 32 bit inodes to 16 as stat and read.
	  -- Mike


Mon Aug 19 13:33:42 GMT/BST 1996

	* Correct IPC problem introduced with Sparc changes.
	  -- Mike


Fri Aug  9 13:27:49 GMT/BST 1996

	* Fix the inode swapping for /dev/spx and XTI/TLI transports.
	  -- Mike

	* If a COFF binary doesn't have a .comment section we have no
	  way to tell what personality we should be using. Switch to
	  SCO anyway - odds on it is.
	  -- Mike


Wed Aug  7 14:22:11 GMT/BST 1996

	* On SCO at least lseek on a character or block device
	  returns 0 not -ESPIPE.
	  -- C.A. Lademann <cal@zls.com>

	* Some problems with /dev/spx and TLI end point handling that
	  could leak descriptors, memory and leave the lists of file
	  locks in an inconsistent state. Not to mention the fact that
	  the socket data in an inode also contains a pointer back to
	  the process' file structure. I _think_ I have this sorted
	  out now...
	  -- Mike

	* Sparc changes broke select. While I was at it I changed it
	  to use the newselect Linux call as well. If we build without
	  tracing we'll save a few more bytes of code now too.
	  -- Mike


Wed Jul 31 14:16:38 GMT/BST 1996

	* Map EAGAIN to EWOULDBLOCK for recv*() and send*() syscalls.
	  Linux seems to return EAGAIN. X/Open allows either EAGAIN
	  or EWOULDBLOCK. SVR4 and Wyse V/386 specify EWOULDBLOCK in
	  their man pages. SCO doesn't admit to non-blocking possibilities
	  in their man pages but some code seems to expect only
	  EWOULDBLOCK.
	  -- Mike


Mon Jul 29 16:58:11 GMT/BST 1996

	* Added a CONFIG option for SMP. This is enabled by default.
	  I don't think this is a problem for non-SMP systems?
	  -- Mike

	* Minor change to the SCO error map.
	  -- Mike


Fri Jul 26 09:13:43 GMT/BST 1996

	* Updated README and RELEASE
	  -- Mike

	* Merged Sparc patches from:
		Miguel de Icaza <miguel@roxanne.nuclecu.unam.mx>
	  -- Mike


Thu Jul  4 12:24:06 GMT/BST 1996

	* The default is now *not* to build a versioned module. I got
	  too many questions about why it wouldn't compile.
	  -- Mike

	* Fix to binfmt_xout.c when Xenix 286 is emulation is not
	  configured.
	  -- Mike


Fri Jun 14 13:36:18 GMT/BST 1996

	* Added code to explicitly fail the SCO LD?MAP ioctls used
	  for channel mapping.
	  -- Mike


Thu Jun  6 17:21:00 GMT/BST 1996

	* Cleaned up Stephans SCO tape ioctls and added the
	  corresponding SVR4 versions (untested).
	  -- Mike


Wed Jun  5 10:47:24 GMT/BST 1996

	* Rewritten the Xenix locking() syscall. The previous one
	  was crap.
	  -- Mike

	* Change the read on directory emulation to fold long inodes
	  to shorts in the same way as stat and getdents. This may
	  help old programs that use stat and read to do a getcwd
	  rather than a stat and getdents.
	  -- Mike

	* Use __get_free_page instead of get_free_page in getdents
	  since we don't need the buffer cleared initially (I think).
	  -- Mike


Sat Jun  1 09:50:30 MET DST 1996
        * Added some tape ioctrls for SCO to iBCSemul/ioctl.c.
          -- Stephan


Fri May 31 08:44:51 GMT/BST 1996

	* Move bsdioctl.c to the main group of source files from
	  than the BSD specifics. Just about everything else has
	  BSD style sgtty stuff and some seemingly modern code
	  actually depends on it (e.g. ISC SVR4 telnet)!
	  -- Mike

	* Add CONFIG option to build a versioned module.
	  -- Mike

	* Install the modules in /lib/modules/`uname -r`/misc for
	  compatibility with the modules tools.
	  -- Mike

	* If the requested connection indications in a bind request
	  is greater than zero do a listen() if the bind is successful.
	  We still also do a listen() if the program selects() on
	  a bound but unconnected stream. This may help some broken
	  programs. It may also break some broken programs. It's
	  debatable whether this should now be in or out.
	  -- Mike

	* The bit vector mapping used for converting vectors of
	  signal flags had an off by one error. The signal maps
	  themselves were also one entry short.
	  -- Mike

	* At some stage I changed the I_SETOWN STREAMS ioctl but
	  never committed it?
	  -- Mike


Thu May  9 12:51:10 GMT/BST 1996

	* Change to install in /lib/modules/`uname -r`/misc instead
	  of /usr/lib/modules for compatibility with the way the
	  modules tools have gone.
	  -- Mike


Thu Apr 25 12:34:06 GMT/BST 1996

	* Use the CONIND_number in a T_BIND_REQ to decide whether
	  or not we should listen() on the socket.
	  -- Mike


Mon Apr 22 15:42:47 GMT/BST 1996

	* Added a simple loader that will attempt to pass scripts
	  that start with ":" and things that look like simple text
	  to /bin/sh. Hopefully this isn't going to conflict with
	  magic for other needed formats...
	  -- Mike


Fri Mar 29 17:11:35 GMT/BST 1996

	* Committing the all new TLI/XTI options handling. Note that
	  TLI and XTI option handling is mutually exclusive at the
	  moment. The default is to enable TLI options handling since
	  that is what existing SVR3/4 systems use. I haven't found
	  one that actually handles X/Open format (they use the
	  TNOTSUPPORT cop out) so I don't know how the stack is
	  told to use XTI format instead of TLI.
	    Note that only SOL_SOCKET/* and SOL_TCP/TCP_NDELAY are
	  known to work to any extent at the moment. Others may (or
	  may not need mapping) but I can't find the motivation to
	  wade through the headers and create yet another table of
	  magic numbers. Hopefully everyone just nicked the BSD
	  reference code...
	  -- Mike

	* Some more 1.3.7x changes related to process accounting
	  (fork but no exec etc.).
	  -- Mike


Wed Mar 20 13:36:07 GMT/BST 1996

	* I seem to have forgotten to add a comment about merging
	  changes from mid 1.3.7x kernels.
	  -- Mike


Wed Feb 28 14:53:00 GMT/BST 1996

	* Fix to shared library loader in binfmt_aout.c from kernel
	  patch 1.3.69.
	  -- Mike


Wed Jan 24 09:58:34 GMT/BST 1996

	* Implemented I_PEEK.
	  -- Mike

	* Changed I_NREAD to understand that control messages constitute
	  queued data.
	  -- Mike


Fri Jan 19 11:57:20 GMT/BST 1996

	* Make the socket level connect in timod.c happen synchronously
	  always. Allowing the async possibility is a little harder.
	  -- Mike


Thu Jan 18 16:06:13 GMT/BST 1996

	* Added (some of) the intial framework for option management.
	  This is documented by X/Open but many XTI stacks don't
	  seem to implement it. Certainly the man page for t_optmgmt
	  in SCO OS5 says it isn't yet implemented. There do seem
	  to be programs out there that make options requests though.
	  Unfortunately I don't have one right now so this is currently
	  disabled and MAY CAUSE KERNEL FAULTS. I don't know...
	  -- Mike


Tue Jan 16 12:35:21 GMT/BST 1996

	* Added a slight change to mmap.c. The SVR4 headers describe
	  a slight change in functionality which is specified with
	  a special flag that is supposedly set by the C library
	  interface. I haven't actually seen this flag set by the
	  SVR4 dynamic loader (which is the only mmapper I've seen)
	  and things seem to work with or without this change. It
	  may not be necessary at all?
	  -- Mike


Fri Jan 12 14:56:38 GMT/BST 1996

	* Remove trace flag from context() in the callmaps. SVR4's
	  /bin/sh seems to use it but doesn't care if it fails.
	  -- Mike

	* Added the SCO OS5 SI86GETFEATURES request to sysi86(). OS5
	  uses this to establish what "features" are available when
	  a program starts (i.e. in crt*.o). Currently we just return
	  the same vector as OS5 itself. I haven't found what the
	  flags mean - but one of them indicates xstat extensions
	  which I have added to iBCS.
	  -- Mike

	* Change .comment parsers in binfmt_coff.c and binfmt_elf.c
	  so we only grab a single page (asking for two contiguous
	  pages is antisocial) and then roll through the comment
	  section in stages.
	  -- Mike

	* Fixes to binfmt_elf.c and binfmt_aout.c so they compile
	  and load with 1.3 kernels.
	  -- Mike


Tue Jan  9 14:29:49 GMT/BST 1996

	* Add a kludge to the TLI connect code. For some reason, under
	  ISC SVR4, telnet seems to gve the port number in network
	  byte order ok but the X programs give it in host byte order.
	  One of them is wrong but presumably both work on ISC (I don't
	  have the hardware to actually install it). We kludge around
	  it here by checking if we are SVR4, AF_INET, port 6000 (host
	  order) and, if so, change it to port 6000 (network order).
	  This will break anything that wants to make an outgoing
	  call to port 28695. There are probably other things that
	  expect incorrect port numbers to work but there seems to
	  be no easy solution here.
	  -- Mike


Fri Jan  5 13:34:43 GMT/BST 1996

	* First draft of code to handle select/poll on transport end
	  points correctly. This isn't well tested but should be good
	  enough to support normal timod usage.
	  -- Mike


Thu Jan  4 13:52:25 GMT/BST 1996

	* TLI changes to get error returns from connects correctly.
	  -- Mike


Wed Jan  3 17:06:07 GMT/BST 1996

	* Added a manual page in the Doc directory. This is not
	  installed by default.
	  -- Mike

	* Fixed a problem in the .comment parsers in binfmt_elf.c
	  and binfmt_coff.c where a number of pages was passed to
	  __get_free_pages() instead of a binary power. This has
	  been in release versions of binfmt_coff.c for a long
	  time but exactly one person has reported anything that
	  might be attributable to it. Strange, since the bug should
	  have manifested itself as insidious memory leakage and
	  corruption...
	  -- Mike


Wed Jan  3 12:16:47 GMT/BST 1996

	* Removed all kernel patches in the Patches directory. None
	  should be need for kernels 1.3.50 (or earlier?) and onwards.
	  None should be essential for 1.2.13 - although some capability
	  is lost notably SCO OpenServer 5 ELF binaries (if the kernel
	  ELF loader is present) and BSD a.out binaries.
	  -- Mike

	* Another fix to termio[s] ioctls to get the control character
	  settings right for SVR4. Previously this was just copied
	  from the SCO mapping and just never got changed.
	  -- Mike


Thu Dec 14 10:41:36 GMT 1995

	* Added basic getpmsg/putpmsg support. It doesn't do anything
	  with bands but we don't have anyway to use them.
	  -- Mike


Tue Dec 12 09:38:01 GMT 1995

	* First commit of the major TLI rewrite for Eric Sixt. This
	  should be enough for normal TCP & UDP clients. It may be
	  sufficient for servers as well but this is untested so far.
	  The client stuff has been tested with SCO cu, ISC telnet
	  and custom test code down to the getmsg/putmsg level. A shared
	  libnsl_s is also included. This has the functions needed for
	  clients but lacks some needed for servers currently. It has
	  been tested on a real SCO system. It could be done better
	  (and should be) but for now we are interested in making existing
	  programs work rather than handling all the error conditions
	  by the book. The library uses SVR3 shared library tools and
	  needs to be built on an SVR3 system (I used SCO).
	    Included is a rewrite of the /dev/spx kludging (the old didn't
	  work if TLI was enabled). This now allows connections to other
	  than /tmp/.X11-unix/X0 (if configured) so you can run multiple
	  X servers on the VCs and display SCO X programs on all of them.
	    The major/minor numbers used for the emulation devices have
	  (necessarily) changed. The top level Makefile will (re)create
	  them on a "make install" or "make devices".
	    Oh yeah, I built stubs for other libraries as well (specifically
	  SCO/SecureWare protlib_s) but don't expect it to have any real
	  support. If programs _really_ need stuff from there they are
	  like to have reduced or completely broken functionality on
	  Linux!
	    The script I used to generate the skeleton APIs for the
	  shared libraries is libs/mkltab if anyone feels the urge to
	  look at other libraries...
	  -- Mike

	* Removed the old quota compile option. It isn't compatible with
	  the quota stuff in 1.3.46 and would only cause confusion. This
	  means you can't use iBCS if you have the old quota patches
	  in a pre-1.3.46 kernel. Tough :-).
	  -- Mike


Mon Dec 11 15:14:46 GMT 1995

	* Map I_SETSIG/I_GETSIG to FIOSETOWN/FIOGETOWN and pray...
	  -- Mike

	* Fixed possible memory leak in COFF & ELF personality recognition
	  when the offset/size of the .comments section is invalid. This
	  could leak when the .comments section exists but is zero bytes
	  long I think.
	  -- Mike


Wed Dec  6 11:31:27 GMT 1995

	* A stat of a file must give an inode that matches what we get
	  from a read of the directory since code that figures out cwd
	  needs the inodes to match. Mind you, if there are several inode
	  numbers greater than 65534 in the directory we are going to get
	  some strange paths. I don't know if this is fixable properly at
	  all?
	  -- Mike

	* Yes it is. We just mask off the high word to get the short
	  inode number for the stat structure.
	  -- Mike


Thu Nov 30 16:21:32 GMT 1995

	* Fix the SVR4 additions to the V7 terminal ioctls. Add handling
	  of TIOC[GS]ETD. Have TIOCL[GS]ET trivially succeed (I can't
	  find the documentation for the arguments).
	  -- Mike


Wed Nov 29 12:57:42 GMT 1995

	* Changed the guesswork svr4_waitsys to implement the correct
	  waitid syscall.
	  -- Mike

	* Enable the i486-linuxaout option in x286emul/Makefile by
	  default. There seem to be significant numbers of people
	  using ELF compilers now. This may be a mistake...
	  -- Mike

	* Fixes to sigsuspend and sigpause in signal.c. The previous
	  invocations of the Linux sigsuspend syscall were wrong and
	  liable to lead to random freeze ups of programs which used
	  sigsuspend() or sigpause().
	  -- Mike


Fri Nov 24 11:03:01 GMT 1995

	* Interactive SVR4 seems to be overloading the BSD termio
	  ioctls with its own.
	  -- Mike

	* The SVR4 procid subcodes don't match the SCO ones. Or, at
	  least, I seem to remember I got the orignal set from SCO
	  and UnixWare and Interactive SVR4 are different (but match
	  each other).
	  -- Mike


Thu Nov 23 17:21:56 GMT 1995

	* Interactive SVR4's /bin/sh calls access(..., 011) but Linux
	  returns EINVAL if the access mode has any other bits than
	  007 set. So we have to wrap it and mask it :-(.
	  -- Mike


Wed Nov 22 10:11:49 GMT 1995

	* Change to binfmt_elf.c to set total_vm value introduced in
	  kernel 1.3.43.
	  -- Mike


Thu Nov 16 15:02:58 GMT 1995

	* Added support for SCO OpenServer 5 binaries using .comment
	  section parsing as with COFF.
	    Built a BSD capable a.out loader as part of iBCS.
	    The iBCS ELF loader is only used for recognised (using
	  .comments) binaries if the standard ELF loader is configured
	  in the kernel iBCS is built against. If the ELF loader is
	  not configured in the kernel iBCS is built against the iBCS
	  ELF loader is used for all ELF binaries. This prevents the
	  iBCS module from becoming un-unloadable on ELF based Linux
	  systems.
	    Similarly the iBCS a.out loader tries to avoid dealing
	  with anything other than BSD binaries for the same reasons.
	    This requires a kernel 1.3.42 or greater to allow iBCS
	  to insert its loaders into the list before the standard
	  kernel ones. Kernels 1.3.39(~) to 1.3.41 have some support
	  but there are bugs which will likely prevent you running
	  *anything* as soon as iBCS is loaded. Mea culpa. Tough.
	  -- Mike


Thu Nov 16 11:00:08 GMT 1995

	* Minor clean up in binfmt_coff.c and fix a minor bug in
	  parse_comments that caused it to miss checking a string
	  if there was a zero length string in among.
	  -- Mike


Fri Nov 10 12:22:05 GMT 1995

	* Changes for latest module bogosities (~1.3.38). We need to
	  define __NO_VERSION__ to avoid linux/module.h putting
	  a kernel_version in *every* damn file.
	  -- Mike


Tue Nov  7 10:55:05 GMT 1995

	* When stealing temp space from the stack we have to actually
	  move esp down and then restore it as the 1.3.x kernels add
	  a check to trap out of bounds stack accesses. This is not
	  tested but I think it only affects the TLI emulation code
	  which is disabled by default.
	  -- Mike


Mon Oct  9 11:22:29 BST 1995

	* Use kernel readv/writev if available.
	  -- Mike


Thu Sep 14 12:21:48 BST 1995

	* Changed references to current->sigaction to allow for the
	  changes in kernel patch 1.3.26 which allow sharing of signal
	  state between clone processes.
	  -- Mike


Mon Sep  4 10:04:22 BST 1995
	  Originally: Wed Aug  2 09:57:56 GMT 1995

	* Removed Xenix interrupt bug, created wait() workaround
	  for INFORMIX-SQL and built the locking() to fcntl()
	  mapping.
	  -- Peter <polte@bbtt.com>


Wed Aug 30 09:19:54 BST 1995

	* Merged kernel patch for binfmt_elf.c from 1.3.21 which sets
	  EDX to zero on process start up. See the comment in the code
	  for reasons.
	  -- Mike


Tue Aug 29 08:44:50 BST 1995

	* Workaround. Local X won't work because a putmsg occurs
	  after we have already swapped the open descriptor for a
	  Unix domain socket. We either need to peek at socket
	  internals or actually implement the messages for passing
	  file descriptors. This quick fix enables local X connections
	  if we build without XTI support.
	  -- Mike


Tue Aug  8 11:36:41 BST 1995

	* Fix streams kludging so local X works again (should do
	  anyway - it's untested as yet due to hard disk collapse.
	  Hopefully someone will tell me if it doesn't work.)
	  -- Mike


Mon Jul 31 13:25:58 BST 1995

	* Changes to allow compilation in the presence of a kernel
	  built with the quota patches.
	  -- Dimitrios Mpougoulias <dbougo@leon.nrcps.ariadne-t.gr>


Tue Jul 18 09:01:53 BST 1995

	* Fixed timod getinfo ioctl. This functionality should move
	  into the message handling as bind has.
	  -- Mike


Mon Jul 17 10:16:43 BST 1995

	* Added handling of BSD-ish sgtty ioctls. For some reason the
	  SVR4 network programs such as telnet have been modified to
	  pushd the ttold STREAMS modules and use sgtty calls instead
	  of simply using termio[s]. Don't blame me! :-)
	  -- Mike

	* Restructuring of timod.c complete. Timod ioctls now use
	  message routines to avoid duplicating code.
	  -- Mike


Wed Jul 12 14:44:30 BST 1995

	* Made debug output in binfmt_coff.c less verbose. We only
	  really care about matched comment strings. If we dump them
	  all here we overrun the kernel message buffer and miss
	  interesting stuff when the program actually starts running.
	  -- Mike

	* Changed __get_free_pages in binfmt_coff.c to give the extra
	  argument required in 1.3 kernels.
	  -- Mike


Tue Jul  4 11:48:27 BST 1995

	* Restructure timod.c ready to rewrite timod_ioctl to use
	  putmsg/getmsg rather than reimplementing the same message
	  protocol again.
	  -- Mike


Mon Jul  3 13:41:49 BST 1995

	* Initial TLI support for outgoing TCP and UDP. Merged BSD/Wyse
	  socket ioctl handling with the socksys handler. Fixed (some)
	  bugs in poll() emulation. Devices in /dev/inet have changed
	  to support TLI access. See README for details.
	  -- Mike


Tue Jun 27 09:00:02 BST 1995

	* Don't export symbols from iBCS. I'm not sure when register_symtab
	  was introduced so we only drop our symbol table in 1.3
	  and later.
	  -- Mike

	* Added missing brackets in binfmt_elf.c as per kernel
	  patch 1.3.4.
	  -- Mike


Thu Jun 22 13:09:49 BST 1995

	* Big step forward with TLI. I now seem to understand what is
	  happening when and have enough to do the initial open and
	  get info requests. This may one day actually work...
	  -- Mike

	* Trap EUC ioctls and return EINVAL. We don't do EUC :-).
	  -- Mike

	* Changes for the 1.3 development kernel. This compiles but is
	  as yet untested. It still seems ok with 1.2.10.
	  -- Mike


Wed Jun 14 09:15:39 BST 1995

	* Added Eric's protection mapping fixes to binfmt_elf.c
	  from 1.2.10.
	  -- Mike


Fri Jun  9 12:31:53 BST 1995

	* Linux can't stat unmounted filesystems but SCO can (by
	  specifying the pathname/fd of a block device and the
	  filesystem type. Linux will just stat the filesystem
	  that the device node is on (i.e. the root filesystem).
	  There isn't much we can do about it. I just lie and
	  claim there is 100MB free of 1GB. I hope this won't
	  cause too much grief...
	  -- Mike


Thu May 18 12:06:50 BST 1995

	* When trying to get an IP domain name don't try the utsname
	  domainname if it is "(none)". If we get that far we have to
	  give in and return a blank domain name.
	  -- Mike


Wed May 17 10:15:42 BST 1995

	* Recheck the socket functions when accept returns a new socket.
	  This is pedantic at this stage since we must have had a
	  socket initially and the current kernel code isn't likely
	  to handle removal and reloading of in use modules. iBCS
	  can handle this happening to it though :-).
	  -- Mike

	* Fix timod faking to correctly return an error if given an
	  invalid file descriptor rather than trying to dereference
	  a null pointer in kernel mode.
	  -- Mike


Tue Apr 25 11:35:43 BST 1995

	* If nap() is given a zero timeout return immediately rather
	  than blocking indefinitely. Ensure that SIGALRM is not ignored
	  during the pause or we never get woken up by the timeout.
	  -- Mike


Mon Apr 24 09:21:30 BST 1995

	* Various documentation updates from Eric.
	  -- Mike


Fri Apr 21 14:34:25 BST 1995

	* Fixes to IPC. Now it really *should* work...
	  -- Mike


Thu Apr 13 14:03:45 BST 1995

	* Tidy up documentation ready for new release.
	  -- Mike


Wed Apr 12 11:07:52 BST 1995

	* Moved to an ELF development system with a GCC 2.6.4 snapshot.
	  This pointed out a few signed/unsigned mismatches so I
	  fixed them. We also have to ensure that x286emul is built
	  as a QMAGIC a.out because it won't work any other way. It
	  isn't likely to work any other way unless someone pays for
	  for it to be done - it isn't what you might call a "sexy"
	  project...
	  -- Mike


Wed Apr 12 08:53:22 BST 1995

	* Added the kernel patch to handle statically linked SVR4 ELF
	  binaries to the Patches directory since it doesn't seem to
	  have made any of the 1.2.x patches yet.
	  -- Mike


Tue Mar 28 09:55:38 BST 1995

	* Made the ISC specific stuff optional via CONFIG.
	  -- Mike

	* 1.	INTERACTIVE UNIX signal numbers are different from IBCS2.
		I added new signalmaps and exec_domains.
	  2.	setpgrp does not deattach the controlling terminal.
		Try the setpgrp test program included here after the patch
		on real SCO or xxxx and Linux/IBCS2.
	  3.	sigset behavior is incorrect. Test program also included.
		Short description: signal handlers registered whith sigset
		should run with the signal blocked, and after return
		the handler must be restored, so sa_flags = 0
		is the correct setting.
		Calling sigset should remove the signal from the
		blocked set.
	  -- Remete Gabor <rg@tomx.elte.hu>


Fri Mar 24 10:20:57 GMT 1995

	* Set the fragment size to zero for [f]statfs() just to be
	  pedantic (SCO does this).
	  -- Mike


Tue Mar 21 10:24:14 GMT 1995

	* Fixes to 286 overlay and x.out loader by Don Camp
	  <don@funsoft.com>.
	  -- Mike

	* New code for SVR4 {get,set}groups since SVR4 uses longs
	  for gids whereas Linux uses shorts.
	  -- Mike


Mon Mar 20 17:06:23 GMT 1995

	* Added code for waitsys(). This is guesswork at this stage
	  but appears sufficient for ISC 4.0 ksh to do something
	  reasonable in the simplest case.
	  -- Mike


Tue Mar 14 09:44:13 GMT 1995

	* Initial implementation of ptrace. This allows programs
	  (SCO and Wyse V/386 programs) to access a process'
	  registers but actual tracing semantics will be difficult
	  to make functional.
	  -- Mike

	* Alter emulate return to allow return of numbers > 2^^31
	  which don't fall in the error code space.
	  -- Mike

	* Added signal mapping to wait() syscalls.
	  -- Mike

	* Updated the main README with the vger mailing list details
	  and a few other tidy ups.
	  -- Mike


Thu Mar  9 10:10:53 GMT 1995

	* Added a load more system calls to the SVR4 tables (these
	  match UnixWare at least I think). Some of these may work,
	  some are just marked to shut up run time warnings.
	  -- Mike

	* Increased the size of the buffer used for parsing comment
	  sections in binfmt_coff.c to 8k (from 1k). There are
	  programs out there that need it.
	  -- Mike


Tue Mar  7 16:12:36 GMT 1995

	* More XLI/TLI changes - mostly fixes.
	  -- Mike

	* Added basic handling of the termiox extension used by SVR4
	  to give access to hardware flow control. Only RTS & CTS
	  or nothing is allowed because that's all Linux does. The
	  same comments as below apply to the status of this.
	  -- Mike

	* Rework ioctl handling for termios. SCO uses short in a termios
	  structure, SVR4 uses longs. The bit shuffling used for SVR4 is
	  the same as for SCO - there are known to be some slight
	  differences but these are not believed to be critical for
	  most things. A large amount of guesswork went in to this.
	  One day I may be able to test it...
	  -- Mike


Mon Mar  6 12:31:05 GMT 1995

	* Added a -DMODULE to iBCSemul/Makefile to make new style kernel
	  modules work.
	  -- Mike


Fri Mar  3 15:04:14 GMT 1995

	* Patches from Eric. (Use Eric's [f]statvfs instead of mine).
	  -- Mike


Thu Mar  2 11:46:03 GMT 1995

	* Fixed a silly in the handling of SO_IMASOCKET and SO_PROTOTYPE
	  plus added a check on the given buffer length.
	  -- Mike

	* Fixed a silly in the sockopt.inc options mapping.
	  -- Mike


Wed Mar  1 14:20:06 GMT 1995

	* Added SVR4 console keyboard mapping and termcap/terminfo
	  options to the PROD.Patches directory.
	  -- Mike


Mon Feb 27 13:30:17 GMT 1995

	* Added simpleminded implementation of [f]statvfs().
	  -- Mike

	* [f]statfs() now respects the length argument to allow for
	  older/smartass code which uses a smaller buffer size.
	  -- Mike


Fri Feb 17 10:33:23 GMT 1995

	* More tidy up, a little more work on TLI/XTI (still nowhere
	  near usable), fixed the signal debugging messages so it
	  makes more sense.
	  -- Mike


Thu Feb  2 12:45:25 GMT 1995

	* Changed the BSD termio ioctl handler to recognise the fact
	  that some provide V7 compatibility and may be invoked from
	  non-BSD binaries - possibly without BSD size encoding.
	  -- Mike

	* Changes for 1.1.88. More definitions moved around in the
	  Linux header files :-).
	  -- Mike


Fri Jan 27 10:12:51 GMT 1995

	* Also mapped new Linux SIGIO to iBCS SIGIO and changed Linux
	  SIGURG to map to SIGUSR1 as documented in SCO's TCP/IP
	  programmer's guide. Is SVR4 the same? How badly do we care?
	  -- Mike

	* Had to add a new personality for Xenix binaries since they
	  have a different number for SIGPOLL - sigh...
	  -- Mike


Mon Jan 23 15:34:01 GMT 1995

	* Changes to includes for 1.1.84.
	  -- Mike

	* Change to binfmt_elf.c from kernel patch 1.1.84.
	  -- Mike


Tue Jan 17 17:10:25 GMT 1995

	* Added tracing of argument and environment vectors passed
	  to exec().
	  -- Mike


Mon Jan 16 11:34:58 GMT 1995

	* Change socksys.c for 1.1.81. There doesn't seem to be a
	  convenient define to test but I intended to roll out
	  most of the "magic" define testing for 1.2 to clean
	  things up.
	  -- Mike

	* Ensure the segment registers are correctly set up when we
	  exec a new program - the LDT we may have been using before
	  no longer exists.
	  -- Mike


Fri Jan  6 11:32:52 GMT 1995

	* Fixed a problem where the Xenix 286 emultor wasn't getting
	  the correct return and error codes from lcall7s.
	  -- Mike

	* Added support for exec() in the Xenix 286 emulator.
	  -- Mike

	* Made the spin-before-launch trap in binfmt_xout.c settable
	  via a trace option, "xout-block". This is used to attach
	  gdb to a 286 process to debug the emulator.
	  -- Mike

	* Fixed a problem with binfmt_xout.c setting the wrong intial
	  brk value for impure segmented binaries. The checks for brk
	  collisions with mapped space were failing brk changes. Before
	  the brk checks were introduced I image we simply trashed
	  text or data...
	  -- Mike


Thu Jan  5 11:21:51 GMT 1995

	* Added some debug to the STREAMS I_PUSH and I_POP. Also made
	  them succeed without actually doing anything. We may be able
	  to work round some instances of STREAMS usage one day...
	  -- Mike


Wed Jan  4 11:17:14 GMT 1995

	* Change yesterday's mkdir to use getname()/putname() to
	  fetch the pathname from user space. I hadn't realised
	  these were already in ksyms.c (although how long have they
	  been there? This breaks compatibility with older versions
	  of the kernel I guess).
	  -- Mike

	* Implement the NIOC ioctls for getting file handles since
	  Oracle's TCP server seems to be wanting to do this for some
	  reason (why???). This is a simple implementation that simply
	  fills in the device number of the filesystem and the inode
	  number of the file. This seems to agree with what SCO is
	  doing. I don't know what the "exported" fields are or should be.
	  -- Mike


Tue Jan  3 14:31:13 GMT 1995

	* POSIX says that a pathname ending with a '/' means the current
	  directory whereas SYSV drops the trailing slash. This is only
	  a problem with mkdir() I think.
	  -- Mike


Fri Dec 16 16:25:44 GMT 1994

	* Added basic support for Wyse V/386 MPX syslocal().
	  -- Mike


Fri Dec  9 09:14:04 GMT 1994

	* Changed eaccess() again. We should always set the uid/gid
	  rather than fsuid/fsgid since the Linux access() call is
	  getting fsuid/fsgid from the current uid/gid.
	  -- Mike

	* Don't bother trying to read x.out segments which have no
	  data in the executable.
	  -- Mike


Thu Dec  8 11:51:06 GMT 1994

	* Only include <linux/segment.h> if <asm/segment.h> hasn't
	  defined KERNEL_DS. The header in the linux subdirectory
	  was obsoleted in 1.1.69.
	  -- Mike


Fri Dec  2 13:50:03 GMT 1994

	* Force QMAGIC format when building x286emul.
	  -- Mike

	* Patches for 1.1.69.
	  -- Mike


Thu Dec  1 13:50:37 GMT 1994

	* Binfmt_xout.c now checks the trace flag to see if debug messages
	  should be produced. Trace now has an "xout" option. Trace is
	  now a Linux binary which uses a personality() syscall to enable
	  emulation so the iBCS trace syscall becomes accessible.
	  -- Mike

	* Changed binfmt_xout.c to use 0x1020 as the entry point for
	  the x286emul kludge overlay. This is the expected value
	  for a QMAGIC binary which is the default with the newest
	  compiler. Really I think uselib() should return something
	  useful but I haven't decided what.
	  -- Mike

	* Made the schedule() trap (so gdb can be attached before the
	  process starts running) in binfmt_xout.c a CONFIG option
	  controlled by the XOUT_TRACE setting.
	  -- Mike

	* Moved the configuration for the optional items out of Makefile
	  and into CONFIG.
	  -- Mike


Wed Nov 30 17:08:05 GMT 1994

	* Fixed a nasty bug in binfmt_coff.c where an extra page was
	  being allocated in the bss causing brk() checks in 1.1.64
	  and later to fail _in_certain_circumstances_.
	  -- Mike


Wed Nov 30 13:58:46 GMT 1994

	* Added support for unpacking ioctls passed via the STREAMS
	  interface and forwarding them to the file descriptor. With
	  a slight change to socksys so that devices with minor 2 get
	  an anonymous dgram socket immediately they are opened this
	  allows many more network programs to work. Thanks to an old
	  piece of code from Chip Rosenthal for revealing how it all
	  worked - it isn't in the documentation :-).
	  -- Mike


Wed Nov 30 11:27:56 GMT 1994

	* Fixed handling of brk and BSD sbrk so error returns are
	  handled correctly.


Mon Nov 28 10:48:25 GMT 1994

	* When doing an IPC_STAT on a semaphore force the semaphore
	  number to be zero as the kernel code erroneously checks
	  it.
	  -- Mike


Fri Nov 25 14:26:41 GMT 1994

	* Massive rework of ipc.c. The previous one was buggy as hell.
	  This one works with all the demo programs from the Wyse V/386
	  IPC documentation. Hopefully someone is going to test it with
	  some *real* applications!
	  -- Mike


Tue Nov 22 09:11:46 GMT 1994

	* Change the TTYDEVTYPE ioctl to say we on a pseudo terminal
	  rather than a console. Anything calling this is likely to
	  want to try fancy stuff like mapping the console memory
	  and playing with I/O ports if it thinks we are on a console.
	  -- Mike


Tue Nov 22 09:07:04 GMT 1994

	* Allow direct usage of 57600 and 115200 serial speeds from
	  the BSD domain with kernels 1.1.65 and later.
	  The mask-and-merge for iBCS<->Linux termios should be checked
	  as we tend to try and preserve unmappable bits where there
	  is no other conflict. In 99% of cases we won't see a problem
	  though...
	  -- Mike


Mon Nov 21 10:05:19 GMT 1994

	* Slight change to previous patch. Confusion over which struct
	  size we should be using for the verify_area plus we need to
	  do a VERIFY_WRITE as we will rewrite the data before returning.
	  -- Mike

	* Changes to ipc.c for reading structures from user space.
	  -- Roberto Bagnara <bagnara@di.unipi.it>


Thu Nov 17 15:24:23 GMT 1994

	* Some of the unused KD ioctls were removed from Linux 1.1.64
	  (or was it 63?). Changed vtkd.c accordingly.
	  -- Mike


Fri Nov 11 14:15:09 GMT 1994

	* Moved the x286emul overlay to /usr/lib instead of /lib. There
	  is no real need for this to be on the root filesystem.
	  -- Mike


Mon Nov  7 13:51:55 GMT 1994

	* Added a version of the BSD exec.c patch for Linux 1.1.62.
	  -- Mike

	* Extended SCO keyboard mapping for new kbd.
	  -- Mike


Tue Nov  1 10:57:18 GMT 1994

	* Changed the personality test in the BSD kernel patch. Apparently
	  FreeBSD uses a machtype of 134 so it's safer to test for Linux
	  rather than BSD.
	  -- Mike


Fri Oct 28 11:25:43 GMT 1994

	* General clean up of the configuration options in the Makefile
	  and elsewhere. It is now possible to choose which loaders are
	  included and whether or not BSD or Xenix 286 emulation is
	  required.
	  -- Mike

	* Added the x286emul overlay library. This is still very alpha
	  but SCO's /bin/masm seems to do the things expected of it :-).
	  -- Mike


Wed Oct  5 17:00:13 BST 1994

	* Fleshed out the F_CHSIZE and F_RDCHK fcntls. I still don't
	  know if these are ever used from the user layer.
	  -- Mike


Tue Oct  4 13:17:32 BST 1994

	* Fixed the BSD termios mappings. This _looks_ ok from the
	  point of view of the NetBSD stty.
	  -- Mike


Fri Sep 23 11:08:31 BST 1994

	* Add SCO ODT version of CorelDraw to COMPAT file.
	  -- Doug Ledford


Thu Sep 22 09:25:04 BST 1994

	* Added the phone numbers of McGraw Hill's order desk to the
	  README file.
	  -- Mike

	* chsize() was causing a segment error. The callmap entry punted
	  to a Linux system call but the argument count was not negative
	  resulting in a call to a bad function pointer.
	  -- Mike

	* Linux doesn't have the l_sysid field in struct flock so we need
	  to slide the l_pid field down a word after doing a locking
	  fcntl.
	  -- Mike


Tue Sep 20 10:31:01 BST 1994

	* Added a simplistic implementation of writev since BSD seems
	  so keen to use it as much as possible.
	  -- Mike

	* Fixed the x.out loader (mostly). This requires a minor patch
	  to the kernel. Expect this to be put in to the kernel itself
	  sometime after 1.1.51. Segment support is still buggy and
	  therefore disabled. If programs assume they know what segments
	  exist it they are broken anyway!
	  -- Mike


Wed Sep 14 11:24:18 BST 1994

	* Added extra fcntl code 14 (used by SVR4 for GETLCK).
	  -- Mike


Tue Sep  6 10:58:49 BST 1994

	* Added setting of fsuid/fsgid to the loaders and changed the
	  eaccess() function in xnx.c to flip fsuid/fsgid rather than
	  uid/gid. If you were having problems with setuid/setgid iBCS
	  binaries this is likely to help.
	  -- Mike


Mon Sep  5 15:07:06 BST 1994

	* Fixed the bad initialisation of howcnv in signal.c.
	  -- Mike


Fri Sep  2 11:01:26 BST 1994

	* Added a little program to the Tools subdirectory which will
	  restamp old binaries with the Linux machine type rather than
	  zero which is used by BSD. Once this is done you can reliably
	  distinguish between BSD and Linux binaries (the current Linux
	  linker will set the correct machine type on all new binaries).
	  -- Mike

	* Updated the BSD patch.
	  -- Mike

	* Changed binfmt_coff to avoid passing meaningless MAP_DENYWRITE
	  and MAP_EXECUTABLE flags to mmap when we are not actually
	  mapping from a file. It would probably never be a problem...
	  -- Mike


Tue Aug 23 17:21:45 BST 1994

	* Added my device trace stub in case anyone needs to investigate
	  and emulate some special device.
	  -- Mike


Wed Aug 17 14:06:34 BST 1994

	* Added an extern definition of the formats list needed by
	  the 1.0.x hooks. Presumably this went AWOL at some stage?
	  -- Mike


Fri Aug 12 09:52:38 BST 1994

	* Slight change to the socksys major allocation. Removed
	  redundant error message.
	  -- Mike


Wed Aug 10 08:57:32 BST 1994

	* Added the spelling corrections from the 1.1.42 kernel patch.
	  -- Mike


Fri Aug  5 10:05:14 BST 1994

	* Added Scott Michel's SCO multiscreen patches.
	  -- Mike

	* More changes to loaders for latest kernel changes.
	  -- Mike


Wed Jul 27 10:59:14 BST 1994

	* Changes for 1.1.36 vm/mprotect.
	  -- Mike


Tue Jul 26 14:20:27 BST 1994

	* Tidied up the system call maps a little. ISC is now handled
	  by the same maps as SCO.
	  -- Mike


Wed Jul 20 12:39:55 BST 1994

	* Removed the lock.patch. This is in the latest kernels.
	  -- Mike

	* Changed the socksys/SCO utsname stuff to do the right thing
	  if we have the hostname set to the fqdn and the domainname
	  set to the NIS domain. If hostname is not an fqdn we assume
	  we are using the domainname == IP domain convention.
	  -- Mike


Wed Jun 29 13:34:34 BST 1994

	* Revised the lock.patch to fix the unlock problem and allow
	  locks on devices. This should go to Linus (and probably has).
	  -- Mike

	* Removed the kernel 1.1.20 patch. This isn't needed as of
	  1.1.22.
	  -- Mike


Mon Jun 27 09:26:24 BST 1994

	* Can't use select() for nap() since the Linux select system
	  call expects to pull its arguments from the user stack.
	  Rewritten nap() using itimers.
	  -- Mike

	* More fixes from Eric for 1.0 compatibility.
	  -- Mike


Fri Jun 24 09:37:50 BST 1994

	* Added a bit about time zones to the HINTS file.
	  -- Mike

	* First draft of BSD termios mapping. Still buggy. Needs
	  work to be useful.
	  -- Mike

	* Fixed BSD getdirentries() to align dirents on long word
	  boundaries. 'ls' now works and 'tcsh' finds and executes
	  commands successfully.
	  -- Mike

	* ibcs_exit should be listed in callmap.inc with arg count 1
	  not -1.
	  -- Mike

Thu Jun 23 09:48:43 BST 1994

	* Lots more BSD-ish stuff. Commit now for release since there is
	  confusion over versions at the moment.
	  -- Mike

	* List Xess MOTIF spreadsheet in COMPAT file.
	  -- Michael K.Johnson <johnsonm@merengue.oit.unc.edu>

	* When slurping in mis-aligned COFF binaries we shouldn't be
	  aligning the file offset and virtual address to a page
	  boundary!
	  -- Mike

	* Merged Eric's latest patches for 1.0 compatibility and Linux
	  ELF capability. This was done by hand. I think it's perfect...
	  -- Mike


Wed Jun 22 14:28:38 BST 1994

	* Many sigsuspend entries in the callmap had argumetn counts
	  of 1 instead of Spl. This caused kernel faults.
	  -- Mike

	* Implemented the ioctls for the pseudo nfs device which under
	  SCO is used to get/set the NIS domain. You need to link
	  /dev/nfsd to /dev/socksys.
	  -- Mike

	* The socksys getdomainname() was doing the same write null to
	  kernel space instead of user space as the wysev386 version.
	  -- Mike


Tue Jun 21 08:54:34 BST 1994

	* Use the map_bitvec() function (added as part of the BSD changes)
	  in signal.c. Note that there were quite a few mapping bugs in
	  the old code. I think I got them all but few would have been
	  triggered by my SCO and Wyse stuff.
	  -- Mike

	* Snapshot BSD stuff again ready for release.
	  -- Mike

	* binfmt_coff.c and binfmt_xout.c should be using mmap(NULL,...)
	  instead of zeromap_page_range as this will create the vm area
	  descriptor as well as mapping the pages. This is needed for
	  the verify_area() in 1.1.20 which has tighter checks than
	  previous versions.
	  -- Mike

	* Map stack region as a GROWSDOWN vm area in binfmt_elf.c
	  -- Mike


Fri Jun 17 16:42:59 BST 1994

	* Major and on going work to add BSD support (optional - see the
	  Makefile). I'm committing this now so I have a current tree
	  ready for release when Linus goes to 1.1.20.
	  -- Mike

	* Wyse get{host,domain}name were using direct assignment to add
	  a trailing null instead of put_fs_byte(). Oops...
	  -- Mike

	* Changes for execution domain support which will be in the main
	  kernel as of 1.1.20. This allows easy registration of lcall7
	  handlers, binary loaders etc. for different personalities.
	  -- Mike


Fri Jun 10 10:12:55 BST 1994

	* Added patch file for kernel locking from Niklas Hallqvist
	  <niklas@appli.se>. This (or something very similar) should
	  end up in the kernel at some stage.
	  -- Mike

	* Merged Eric's changes for 1.0 compatibilty - or rather didn't.
	  After playing with diff for quite a while I finally realised
	  we'd both done exactly the same changes :-). However Eric
	  has tested them...
	  -- Mike

	* Added Brandon's iBCS trace binary from Eric's 1.0 compatibility
	  release.
	  -- Mike


Thu Jun  9 10:22:56 BST 1994

	* Mapped msgsys to ibcs_msgsys in callmap.inc. It existed, we
	  just didn't admit it before :-).
	  -- Mike


Tue Jun  7 08:50:34 BST 1994

	* Sorted out some more ioctl stuff and added a handler for the
	  STREAMS ioctl set. This is needed for I_NREAD (number of
	  characters readable). Some SYSV X libraries contain implicit
	  assumptions that the X connection is via a STREAM and use
	  I_NREAD in preference to BSD/socket FIONREAD.
	  -- Mike

	* Oh, Jeez... The changes made for the official kernel patches
	  completely shafted the 1.0 compatibility. I've remerged the
	  previous code with the new code - there may still be some
	  things that need pulling back though. At this point I don't
	  have a 1.0 kernel tree around to test against.
	  -- Mike

	* If a COFF program is not correctly aligned disable demand
	  paging and resort to slurping the whole lot in at start up.
	  -- Mike

	* Added missing -I../include to the Tools Makefile.
	  -- Mike


Fri Jun  3 11:53:21 BST 1994

	* Added my virtual system tools. A virtualised SCO 3.2.4
	  system is usable for real work for me...
	  -- Mike

	* Added the synchronous ioctl set. This conflicts with the
	  SCO 3.2.x (x < 4) ioctl for getting the video map so it should
	  be dependent on the file descriptor it is applied to but since
	  we don't currently support either...
	  -- Mike


Thu Jun  2 17:02:26 BST 1994

	* Added support for FIORDCHK ioctl. SCO says it's there for
	  "backward compatibility" but the system programs still
	  seem to use it (notably ksh).
	  -- Mike


Tue May 31 13:39:34 BST 1994

	* Patches to sysfs.c for 1.0.x compatibility from Tor with
	  some extra clean up.
	  -- Mike


Fri May 27 09:15:21 BST 1994

	* Ensure we set up signal() handlers as SA_ONESHOT and sigaction()
	  handlers as sticky - similar to patch from Remete Gabor.
	  -- Mike

	* Added the SCO cxenix sigaction extensions. Barely tested...
	  -- Mike

	* Added the cxenix {get,set}itimer calls discovered on SCO by
	  Brandon. Currently these are directly mapped to the Linux
	  syscalls. They are undocumented by SCO (as far as we know)
	  and untested by us (for now).
	  -- Mike


Thu May 26 11:58:18 BST 1994

	* Don't include the 0.0.0.0 to localhost address mapping if we
	  are building for 1.1.15+. This is mapped in the kernel as of
	  1.1.6 and since we don't support 1.1 kernels before 15...
	  -- Mike

	* Type of signal map vectors should be unsigned long not int.
	  -- Mike

	* Allow tracing to be compiled in to the COFF loader and turned
	  on and off with the Tools/trace program.
	  -- Mike

	* Signal maps moved out to maps/signal.inc. The only special
	  mapping that happens is for ISC which has a problem with
	  Oracle sending SIGSTOP to its backend when SIGSTOP doesn't
	  appear to be defined for ISC. We just map SIGSTOP to 0 so
	  it appears to work but does nothing.
	  -- Mike

	* Changes for 1.1.15. This will not work with kernels between
	  1.1.10 and 1.1.14 inclusive - guaranteed. It should still
	  work with the 1.0.x series but has not been tested recently.
	  It probably works against 1.1.0 to 1.1.13 inclusive but that
	  is purely coincidence - you shouldn't be using old 1.1.x
	  kernels as it's a development series.
	  -- Mike


Tue May 24 17:27:54 1994  Eric Youngdale  (eric@tantalus)

	* binfmt_xout.c: Use linux_binfmt struct, register_binfmt,
	  unregister_binfmt as in pl14.

	* binfmt_elf.c, binfmt_xout.c: Likewise.

	* signals.c: Make signals[] and lsignals[] global variables.

	* ibcs/include/ibcs.h: Add prototypes for signals[] and lsignals[].


Tue May 24 10:37:01 BST 1994

	* Added map entries for the ISC personality to all the maps
	  files. Must be more careful adding personalities.
	  -- Mike

	* Added Oracle to the COMPAT file.
	  -- Mike

	* Remember the problem with interrupting an Informix 4GL program
	  causing it to go psycho because of I/O errors from the tty?
	  Well, this doesn't happen with the new tty drivers in 1.1.13.
	  I never found why it happened...
	  -- Mike

	* Noted that the 1.1.11 kernel patches are still ok with 1.1.13.
	  -- Mike


Mon May 23 08:50:21 BST 1994

	* Mapped ISC sysconf() to the existing Xenix sysconf(). This
	  looks right but isn't checked at all.
	  -- Mike

	* Added ISC TCSETPGRP and TCGETPGRP ioctl traps.
	  -- Mike


Thu May 19 09:26:34 BST 1994

	* Added a bug hunting section to the README.
	  -- Mike

	* Always access the socket layer by picking up the file operations
	  from an open socket descriptor. This removes the need for
	  kernel socket functions to be global and should be friendlier
	  towards a loadable socket layer one day.
	  -- Mike


Mon May 16 10:20:38 BST 1994

	* Always access system calls via the system call table regardless
	  of whether we are using a loadable module or linking directly
	  to the kernel. This allows other things to be loadable too.
	  -- Mike


Wed May 11 13:52:12 BST 1994

	* Added a tip on how to fix X font problems to the HINTS file.
	  Other "soft" changes welcome. Does anyone read the ChangeLog?
	  -- Mike

	* Introduced the PROD.Patches directory and put the WP install
	  fixes in there. Documented in COMPAT and README.
	  -- Mike

	* Added some hints on incompatible shell behaviour.
	  -- Mike


Mon May  9 11:07:52 BST 1994

	* Updated the 1.1 patch file for 1.1.11.
	  -- Mike

	* Additions for Interactive 4.0
	  -- Karl Kiniger (ki@kretz.co.at)


Fri May  6 12:03:00 BST 1994

	* Merged old sysfs.c with the new sysfs.c. The code will now
	  work against any kernel - 1.0, 1.1, 1.1.9, 1.1.10...
	  -- Mike


Thu May  5 10:39:52 BST 1994

	* Reworked for compatibility with 1.1.10. Kernel patches
	  are *not* updated yet. We expect the kernel changes to go
	  in to the official distribution any time now...
	  -- Mike


Tue May  3 12:03:31 BST 1994

	* Joe/Brad's IPC additions.


Fri Apr 29 10:06:10 BST 1994

	* Updated the README to explain the difference between sysfs.c
	  and sysfs.c.old
	  -- Mike


Wed Apr 27 11:38:52 BST 1994

	* Added mapping of chsize() to ftruncate(). Implemented nap()
	  using select().
	  -- Mike

	* Further fix to termios mapping for iexten and tostop.
	  -- Mike

	* Updated the 1.1.? patch. New ksyms.c with fewer symbols plus
	  removed all the socket patches. Sockfunc.h is no longer
	  required. The 1.0 patch isn't updated but the extra cruft
	  that's in there now shouldn't be any problem.
	  -- Mike


Tue Apr 26 11:49:07 BST 1994

	* Removed references to linux/sockfunc.h. We seem to have run
	  out of internal socket functions to put in it finally.
	  -- Mike

	* Removed use of socki_lookup(). This just wraps some checks
	  around inode->i_socket. We assume the socket layer is stable
	  by now...
	  -- Mike

	* Access [gs]etsockopt via the socketcall interface.
	  -- Mike

	* If we have to use our own CFLAGS look in the include directory
	  above in case we have been dropped in to the kernel.
	  -- Eric

	* Grab socket file operations when we create a socket rather
	  than linking against them directly. Similar to Eric's
	  changes but different...
	  -- Mike


Fri Apr 22 11:10:18 BST 1994

	* The 'x' class of ioctls are back to being termios rather
	  than termio. The problem was that the field size in iBCS
	  termios and Linux termios is different.
	  -- Mike

	* Added iBCS <-> Linux termios mapping. This is untested and
	  probably imperfect at this stage but nothing crashes with
	  this code...
	  -- Mike

	* The iBCS time() syscall doesn't take an argument, the save,
	  if any, is handled in the interface library.
	  -- Mike

	* Updated the 1.1 kernel patch to be against 1.1.8. It won't
	  work with anything less than 1.1.8 but then if you are
	  playing with 1.1 you should be playing with the latest...
	  This involves a change in the way sysfs() works. If you
	  are using 1.0 and have applications that call sysfs()
	  (practically none do) then you need to build with sysfs.c.old.
	  -- Mike

	* The Linux kernel 1.1.8 replaces the static file_systems
	  table with a linked list ready for loadable file systems.
	  Naturally, I was ready for this... :-(
	  -- Mike


Thu Apr 21 10:34:34 BST 1994

	* sysfs.c should be including linux/string.h to get the
	  inline string functions rather than needing library
	  functions.
	  -- Mike

	* Added code to map between Linux termio structs and SCO/iBCS
	  termio structs. There are slight differences. Mapping needs
	  to be done for termios structs too. Anything that uses termios
	  at this stage is likely to ge a nasty shock!
	  -- Mike


Tue Apr 19 22:56:55 1994  Eric Youngdale  (eric@esp22)
 
	* ibcs.h: Put declaration of sys_call_table outside of ifdef.
	  (So can be compiled into kernel instead as a module).


Tue Apr 19 10:21:17 BST 1994

	* It looks as though the 'x' class of ioctls should be termio
	  ioctls rather than termios. At least this is the case as far
	  as SCO 3.2.4 stty appears to be concerned.
	  -- Mike

	* Avoid copying the entire lock structure backwards and forwards
	  just to increment one field in open.c. There could be a problem
	  here - SCO has a sysid field *before* the pid field but only
	  if _XOPEN_SOURCE or _POSIX_SOURCE is defined at compile time.
	  There appears to be no obvious way to know what is being used???
	  -- Mike


Mon Apr 18 08:49:37 BST 1994

	* There appear to odd little niceties involved with SYSV which
	  depend on system configuration and the way users do things.
	  Added a HINTS file with known problems/workarounds.
	  -- Mike

	* Changed some annoying KERN_ERRs to KERN_DEBUGs in signal.c
	  -- Mike

	* Watch out for (mis)use of INADDR_ANY instead of localhost
	  (primarily by syslog() code?) and replace it with the
	  localhost address. We should perhaps do this for sendto()
	  as well? (Eric spotted this one on CorelDraw but it's a
	  problem with the standard libsocket.c)
	  -- Mike

	* Processes should be allowed to reduce their file size
	  limit but only increase it if they have root privileges.
	  -- Mike

	* Fixed the bug in [f]statfs where the first two arguments
	  to memcpt_tofs() were exchanged (spotted by Eric).
	  -- Mike

	* SCO seems to like utsys (v7_utsname) to return the same
	  thing for sysname and nodename fields just like the SCO
	  extended utsname structure has. The SVR4 (abi_utsname)
	  return is unknown at this time.
	  -- Mike

	* Removed comments on IPC from README. It *is* fixed?
	  -- Mike

	* Fix IPC which was broken by syscall changes. Also fix
	  structure mappings.
	  -- Joseph L. Portman III <baron@hebron.connected.com>


Thu Apr 14 11:27:24 BST 1994

	* At some stage SCO managed to build some of their binaries
	  with the copyright comment string in quotes so we have a
	  new recognition string in the COFF loader. (Seen in uname
	  on a 3.2.2 system).
	  -- Mike

	* If we have tracing compiled in then only give unsupported
	  syscall messages if we are tracing the API or the syscall
	  in question. This allows us to quieten unsupported but
	  unimportant syscalls.
	  -- Mike

	* Comment on the IPC limitations in the README file.
	  -- Mike

	* Added implementation of xnx_pathconf(). Actually it doesn't
	  look as if we really need it. The Microsoft C compiler seems
	  to be misusing it anyway and doesn't even care that it gets
	  an error.
	  -- Mike


Wed Apr 13 09:14:50 BST 1994

	* Added handling of TIOC[GS]PGRP.
	  -- Mike

	* Added implementation of xnx_eaccess(). This is currently
	  simpleminded because Linux access() is. My eaccess() may
	  even be wrong.
	  -- Mike

	* When tracing signal delivery we shouldn't be clearing the
	  signal flag after reporting it or the signal is never actually
	  delivered. I copied the assembler from the kernel and forgot
	  to deleted an opcode...
	  -- Mike

	* Signal 0 should have been identity mapped so kill 0 works.
	  -- Brandon S. Allbery (kf8nh@kf8nh.ampr.org) (bsa@kf8nh.wariat.org)

Tue Apr 12 14:30:25 BST 1994

	* Corrected file size passed to/from setrlimit/getrlimit
	  -- Graham Adams (gadams@ddrive.demon.co.uk)


Tue Apr 12 11:16:45 BST 1994

	* Added support for an obscure SCO extension that is used
	  to get SCO's extended utsname information.
	  -- Mike

	* Changed ipc.c to always go via the ipc syscall rather than
	  direct to internal functions. This should survive if ipc
	  isn't in the kernel. It should even do sensible things if
	  the ipc module is loaded/unloaded on us.
	  -- Mike

	* Initial changes to access system calls via sys_call_table
	  -- Mike


05 April 1994

	* Eric's pre-release fixes.


Wed Mar 30 22:35:28 1994  Eric Youngdale  (eric@esp22)
 
	* ioctl.c: Change 'F' to 'f' for SVr4 FIONREAD ioctl.

	* Makefile: Add svr4.c.
 
	* svr4.c: New file (sort of - it got lost in shuffle before).

	* include/ibcs/ibcs.h: Include prototypes for abi_uname.

	* maps/callmap.inc: Insert abi_uname in syscall number 135.
	Add sys_rename in slot 134 (emacs v18 requires this).


Tue Mar 29 23:32:35 1994  Eric Youngdale  (eric@esp22)

	* Makefile: Fix so that we do not need uname.  Use symbol from
	.config instead.

	* README: Update a bit.


28 March 1994

	* Preparation for release:
	  Tidy up documentation and create CREDITS file from the old
	  ToDo list.
	  -- Mike


27 March 1994

	* Preparation for release:
	  Move headers into a subdirectory.
	  Move maps into a subdirectory.
	  -- Mike


25 March 1994

	* Changed the COFF loader so that if the filesystem doesn't
	  support mmap we read in the whole lot initially and let
	  it page to swap if necessary. This is already in the x.out
	  loader, it should go in the ELF loader too at some point.
	  -- Mike


24 March 1994

	* Added a loader for x.out i386 small model binaries - i.e 386
	  Xenix programs. <=286, non-small model binaries are not
	  supported and not likely to be in the near future.
	  -- Mike


Wed Mar 23 23:12:54 1994  Eric Youngdale  (eric@esp22)

	* Add ioctl for 0x4004667f (FIONREAD) (used by SVr4).

	* map.h (map_segment.map): Make unsigned.

	* hrtsys.c: New file implementing parts of the hrtsys syscall.


02 March 1994

	* Add socket value mappings. This meant a general move round
	  to tidy things up and group map functions/tables.
	  There is a new kernel patch in the Patches directory called
	  net.patch which gives us access to the sock_*sockopts
	  functions directly.
	  -- Mike


28 February 1994

	* Implementation of poll().
	  -- Eric


25 February 1994

	* Pedantic change to call maps so that IBCS_function contains
	  a void * instead of a function pointer - we cast it as
	  necessary later in emulate.c. The warnings were annoying me.

	* Moved struct abi_sigaction from signal.c to abi4.h so it is
	  available for prototype declarations. Changed prototype for
	  abi_sigsuspend to correspond to implementation in signal.c.
	  -- Mike

	* Reversed out Eric's earlier signal patches and added new ones.
	  -- Mike

	* Updated trace code and trace control program to be useful.
	  Control of tracing individual functions is still not there
	  yet - perhaps another day.
	  Default trace mode is now none (i.e. only functions with
	  the trace flag set are traced). Use the trace program to
	  change the trace level.
	  -- Mike

	* File modes (open/fcntl flags) are different between Linux and
	  iBCS so we need to map between them. Open also requires this
	  so fcntl.c is now merged with open.c. Failure to set and reset
	  non-blocking mode was what was breaking Unipox.
	  -- Mike

	* Signal handling function changes to map to and from the Linux
	  signal set and sigaction flags correctly.
	  -- Eric


24 February 1994

	* Added code to the emulate() function to let us know when we
	  are about to process a signal on exit from the syscall.
	  -- Mike

	* Implemented proctl() as a no-op. It's not really relevent
	  under Linux.
	  -- Mike

	* Added argument count and type for eaccess()
	  -- Mike

	* Have emulate.c return -ENOSYS for unimplemented system calls
	  rather than zero.
	  -- Mike

	* Added Eric's patches to waitpid.

	* Created the ChangeLog!
