changelog-1997

cygwin, 著名的在win32下模拟unix操作系统的东东

	initialization of signal/sub process handling.  Change to use new
	process_state field in pinfo.
	(_exit): Remove spurious debugging statement.  Terminate sigproc
	processing.  Remove signal blocking obviated by previous signal
	termination.  Remove SIGCHLD notification of parent as it is now
	handled automatically in the parent.
	(api_fatal): Terminate sigproc processing.
	* exceptions.cc: Add new sigproc.h include.  Change name of
	ourhThread.
	(ctrl_c_handler): Change to static as this is no longer called
	outside of this module.
	(lock_cs): Change to a function which will optionally grab new
	signal dispatch mutex.  Don't wait forever for cs mutex.
	(unlock_cs): Change to a function which will optionally release
	new signal dispatch mutex.
	(init_exceptions): Detect errors from SetConsoleCtrlHandler.
	Initialize new sig_dispatch mutex.  This mutex is used to
	control dispatching to a function on signal receipt.
	(sig_dispatch_pending): New function.  Called from signal
	processing thread to dispatch pending signals.
	(set_process_mask): Block signal dispatch during setting of new
	mask, if possible.  Contact signal thread to dispatch pending
	signals.
	(handle_sigsuspend): New function.  Attempts to implement a
	sigsuspend which will not lose signal notification.  Called from
	sigsuspend.
	(call_handler): Use sigproc_printf where appropriate.
	(ctrl_c_handler): Use _raise to invoke the correct signal.
	(sighandle): New function.  Subsumes most of ctrl_c_handler.
	Change to mark as suspended signals which would dispatch for which
	the sig_dispatch mutex is unavailable.  Use sigproc_printf where
	appropriate.
	(events_init): Remove application_stopped mutex made obsolete by
	new sigproc handling.
	(events_terminate):  Remove application_stopped mutex made
	obsolete by new sigproc handling.
	* fork.cc: Add new sigproc.h include.
	(cygwin_fork_helper1): Use process_state field in pinfo (replaces
	inuse_p).  Call proc_register to add a new subproc to sigproc
	handling.  Call sigproc_init for new subprocess.  Remove obsolete
	window_init.
	* heap.cc (_sbrk): Use process_state field in pinfo (replaces
	split_heap_p).
	* hinfo.cc (hmap_init): Use process_state field in pinfo (replaces
	cygwin_parent_p).
	* include/sys/strace.h: Add tracing for signal/subprocesses.
	* init.cc:  Add new sigproc.h include.  Add waitq_storage global
	for new sigproc handling.
	(dll_entry): Add initialization, destruction of structures needed
	by new sigproc handling.
	* net.cc (fhandler_socket::ioctl): Use gethwnd() function to find
	hwnd of hidden window.
	* pinfo.cc: Add new sigproc.h include.
	(pinfo::clearout): Use process_state field in pinfo (replaces
	split_heap_p).  Explicitly initialize various handles to NULL.
	(pinfo_init): Use process_state field in pinfo (replaces
	cygwin_parent_p).
	(pinfo_list::operator): Use process_state field in pinfo (replaces
	inuse_p).
	(pinfo_list::alocate_pid): Initialize process_state field.
	(pinfo::init_self): Remove obsolete initialization of hProcess.
	(pinfo::record_death_nolock): Changes for new sigproc handling.
	(pinfo::record_death): Move bulk of this code to sigproc.cc.
	(pinfo::terminate): Remove function made obsolete by sigproc
	handling.
	(pinfo::init_from_exec): Use process_state field (replaces
	inuse_p).
	* signal.cc: Add new sigproc.h include.
	(kill_worker): Call new sig_send function to send signals to
	cygwin processes.
	(_kill): Use process_state field in pinfo (replaces inuse_p).
	(sigsuspend): Call handle_sigsuspend in exceptions.cc to handle
	sigsuspend in a non-raceable way.
	* sigproc.cc: New signal/subprocess handling module.  Replaces
	SendMessage method for signals with a method using semaphores.
	Also detects changes in the state of child processes.
	* sigproc.h: New header file defining constants and functions for
	signal/subprocess handling.
	* spawn.cc: Add new sigproc.h include.  Clean up trailing spaces.
	(spawn_guts): Reorganize to use new sigproc handling.
	Use new pinfo process_state field (replaces inuse_p).
	* syscalls.cc (_read): Use new pinfo process_state field (replaces
	inuse_p).
	(_write): ditto.
	* tty.cc (tty_init): Use new pinfo process_state field (replaces
	cygwin_parent_p).
	* utils/ps.cc (main): Use new pinfo process_state field (replaces
	inuse_p).  Detect "zombie" processes similarly to UNIX ps.
	* wait.cc: Add required includes.
	(wait_found): Function obsoleted by new sigproc handling.
	(wait4): Reorganize to use new sigproc handling.
	* window.cc: Changes for new sigproc handling.
	(WndProc): Remove SIGNAL handling obsoleted by new sigproc
	handling.  Use static window handle since the field has been
	removed from pinfo.  Use _raise where appropriate to send signals.
	(Winmain): Replace global window handle with static since the
	field has been removed from pinfo.
	(window_init): Remove obsolete function.
	(gethwnd): New function to allocate hidden window on demand rather
	than at startup.
	(window_terminate): Kill hidden window only if allocated.
	(setitimer): Use gethwnd function to retrieve hidden window
	handle.
	* winsup.h: Remove stuff made obsolete by sigproc handling.  Move
	some constants to new sigproc.h header file.  Remove inuse_p,
	cygin_parent_p, split_heap_p.  Replace with a single process_state
	field.  Define bit fields for process_state in an enum for easier
	debugging.

Mon Oct 20 19:17:33 1997  Geoffrey Noer  <[e-mail]>

	* sysdef/i386/winserve.def: remove ancient version of cygwin.din
	* include/sgtty.h: remove since Cygwin32's tty handling doesn't
	support bsd syntax/semantics
	* include/sys/termios.h: change winsize struct to include
	ws_xpixel and ws_ypixel members
	* cygwin.din: remove export of ScreenCols, ScreenGetCursor,
	ScreenRows, ScreenSetCursor, get_pid__5pinfo, getkey, _getkey,
	kbhit, _kbhit, __small_printf = small_printf__FPCce
	* key.cc: remove.  Similar functionality exists in ncurses
	which can be compiled for Cygwin32
	* console.cc (ScreenCols, ScreenGetCursor, ScreenSetCursor,
	ScreenRows): delete and delete SCREEN_ROWS/COLS defines
	* pold.c: remove old pipe-related code that's no longer used
	* include/regex.h: remove, it's not a part of cygwin.dll
	* syscalls.cc: started to add comments including standards
	information
	(truncate): new
	(ftruncate): length is an off_t, not a size_t.  Add missing 
	return value to debug printf
	* syscalls.h: ftruncate length is an off_t, add proto for truncate

        patch from [e-mail] (Chris Faylor):
	* console.cc (fhandler_console::write): Recognize '@' as a valid
	character to follow a '\e[' sequence or get 'Bad escape' errors.

Wed Oct 15 18:44:25 1997  Geoffrey Noer  <[e-mail]>

	* cygwin.din: restore __main as an export

Mon Oct 13 18:41:09 1997  Geoffrey Noer  <[e-mail]>

	* cygwin.din: revert renaming of __assert since that's
	actually what it's supposed to be called
	* assert.cc: ditto

Fri Oct 10 19:25:49 1997  Tom Tromey  <[e-mail]>

        * include/Windows32/Base.h: Moved typedefs of CHAR, SHORT, etc,
        before all other uses in file.

Fri Oct 10 17:50:12 1997  Ian Lance Taylor  <[e-mail]>

        * include/Windows32/Base.h: Only typedef CHAR, SHORT, and LONG if
        VOID is not defined

Thu Oct  9 00:46:40 1997  Geoffrey Noer  <[e-mail]>

	* cygwin.din: remove all libgcc.a exports.  They don't
	belong here since libgcc.a doesn't really relate to the
	purpose of cygwin.dll, and (to make things worse) the contents
	change over time.
	* assert.cc: rename __assert to __cygwin32_assert
	* exceptions.cc: rename __stack_trace to __cygwin32_stack_trace,
	__cygwin_except_handler to __cygwin32_except_handler
	* version.h: increment major and minor numbers

Tue Oct  7 12:52:25 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* dcrt0.cc (_exit): under Win 95, don't send SIGCHLD
	unless special env variable is set.  This works around a
	problem where exiting a process can hang under Win 95.

Mon Oct  6 23:41:34 1997  Geoffrey Noer  <[e-mail]>

	* regexp: new directory containing free regexp code by
	Henry Spencer.  Taken from the most recent release of NetBSD.
	Write configure.in and Makefile.in, based on files from
	winsup/utils.
	* Makefile.in: build regexp directory and include objs in
	cygwin.dll.
	* stubs.cc: remove all reg* stubs except for regfree which
	isn't provided by above code.

Mon Oct  6 13:35:48 1997  Geoffrey Noer  <[e-mail]>

	* dcrt0.cc: remove asm idata3 terminator, now that ld is fixed
	such that this is no longer necessary.
	* libccrt0.cc: ditto

Mon Oct  6 13:14:00 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* spawn.cc (spawn_guts): return child's PID on
	spawn (_P_NOWAIT,...) instead of child's handle.
	(cwait): rewritten as a wrapper to waitpid.

Mon Oct  6 13:02:01 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* net.cc (socketpair): new
	* cygwin.din: add socketpair export

Mon Oct  6 13:01:51 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* dcrt0.cc: Remove obsolete call to fork_terminate.
        * exceptions.cc: Respace, remove extraneous trailing whitespace.
        Change critical section to mutex since there are supposedly
        multi-processor problems with critical sections under NT.
        Use "lock_cs" and "unlock_cs" macros to lock/unlock critical
	regions.
        (init_exceptions): Change critical section initialization to mutex
        initialization.
        (set_process_mask): Use locking macros to control access to
	sig_mask.
        (ctrl_c_handler): Use lock_cs/unlock_cs to control access.
        (events_init): Use standard cygname function to create names for
        shareable objects.
        (events_init): Close cs mutex.
        * fork.cc: Use event flags which are specific to the child being
        forked.  This prevents one process from prematurely activating
        another.  It also makes fork slightly more thread-safe.
        (fork_init): Remove event initialization.
        (fork_terminate): Remove function.
        (cygwin_fork_helper1): Initialize events on a per-fork basis.
        Events are inherited in child's pinfo structure.
        Remove child->hThread initialization as it not needed.  Use
        pi.hThread where child->hThread is used.
        Work around Windows 95 bug where a WaitForSingleObjects will
        sometimes return ERROR_INVALID_HANDLE when it is resumed after
        a suspend.
        * pinfo.cc: Remove references to hThread field whereever it occurs.
        * strace.cc: Use standard cygname function to create name for
        strace_mutex.  Prevents confusion between different .dll versions.
        * wait.cc (wait_found): Remove reference to hThread.
        * winsup.h (class pinfo): Remove reference to hThread.  Add
        per-process fork control event handles.
	* include/limits.h:  Increase NGROUPS_MAX from 0 to 1 to reflect
	recent change to getgroups.

Mon Oct  6 11:06:22 1997  Geoffrey Noer  <[e-mail]>

	Oops.  ../libio refers to objdir and is not the same
	as $(srcdir)/../libio.

Thu Oct  2 23:12:19 1997  Geoffrey Noer  <[e-mail]>

	Revert patches to sources applied after Sept 16.  Removed
	relevant portions of ChangeLog entries.  Some of those changes
	may reappear later (removing the entries makes this log easier
	to understand).

Thu Oct  2 15:34:03 1997  Geoffrey Noer  <[e-mail]>

	* Makefile.in: remove hardcoding of SHELL to /bin/sh, remove
	../libio from INCLUDES since $(srcdir)/../libio is already
	included.
	* glob/Makefile.in: remove hardcoding of SHELL to /bin/sh

Mon Sep 29 14:06:24 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* cygwin.din: add exports for rcmd, rresvport, rexec
	* net.cc (cygwin32_rcmd): new
	(cygwin32_rresvport): new
	(cygwin32_rexec): new
	* include/mywinsock.h: add protos for Winsock calls associated
	with functions called by the above.

Mon Sep 29 13:26:24 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* grp.cc (getgrent): Change overlooked comment to reflect new
	behavior.

Thu Sep 25 18:35:49 1997  Geoffrey Noer  <[e-mail]>

	* Makefile.in: remove debugdll defs since the shared memory
	overlap problem is solved by the timestamp addition of Sept 23
	* version.h: rework explanations of version numbers

Thu Sep 25 16:21:49 1997  Geoffrey Noer  <[e-mail]>

	* spawn.cc: add missing cast to debug printf

Thu Sep 25 16:14:17 1997  Ian Lance Taylor  <[e-mail]>

        * path.cc (conv_to_win32_path): Call backslashify on a win32
        path.

Tue Sep 23 17:58:17 1997  Geoffrey Noer  <[e-mail]>

	Fixes for things that were causing compile-time warnings: