changelog-1997

cygwin, 著名的在win32下模拟unix操作系统的东东

	* spawn.cc (spawn_guts): save the path of the script itself,
	use the saved path while building the command line to execute.

Thu Nov 20 22:58:23 1997  Geoffrey Noer  <[e-mail]>

	* stubs.cc: delete file, move unimplemented stubs to the
	files in which they would normally belong.
	* grp.cc (setgrent): implement (was in stubs.cc)
	* syscalls.cc: move regfree, mknod, setgid, set(e)uid, sync,
	crypt, and PPC __chkstk/_alloca/dll_entry stubs here from stubs.cc
	(sync): just return zero for now instead of -1
	(crypt): return -1 instead of 0

Thu Nov 20 22:41:57 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
        * spawn.cc (spawn_guts): A premature close of the spawned filehandle    
        was possible when reparenting an exited process.  Fix this.
        * dcrt0.cc (do_exit): Only do minimal cleanup if "pid focus"
        has moved to another windows process or the other process will
        become confused.

	patch from [e-mail] (Sergey Okhapkin):
	* sigproc.cc (getsem): set errno to EPERM if existing semaphore
	cannot be opened.
	(wait_subproc): allow access to signal semaphores to process's
	owner only except for SIGCHLD (needed for SIGCHLD delivery after
	sexecXX calls).

Thu Nov 20 00:52:58 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* syscalls.cc (hash_path_name): Ignore trailing backslash when
        calculating pathname hash.
        * hinfo.cc (hinfo_vec::de_linearize_fd_array): Set use_tty
        if /dev/ttyn is detected in the shared_fd_table.  Before this
	change, executing "set CYGWIN_TTY=1", "bash", "unset CYGWIN_TTY",
	"/bin/pwd" would result in pwd printing nothing because
	the de_linearize code would use the wrong fhandler_xxx when
	reading from the buffer inherited from the parent process.
        * cygwin.din: Add new ctermid function for export.
        * syscalls.cc (ctermid): New function
	* exceptions.cc (call_handler): If called during a P_OVERLAY
	spawn, merely set appropriate flags and return.  The spawn
	code will then clean up and exit.
	* sigproc.cc (proc_exists): Reorganize to better detect defunct
	processes.  Don't clean up pinfo if process has a parent since the
	parent should clean up eventually.
	* spawn.cc: New global exec_exit.  Set by signal handler to
	value which should be used on exit from aborted spawn.
	(spawn_guts): Try harder to let the child terminate (if it is
	going to) before exiting on a signal.  Remove obsolete code.

	patch from [e-mail] (Sergey Okhapkin):
	* exec.cc (file_exists): Removed
	* spawn.cc (spawn_guts): call perhaps_suffix to convert filename
	to win32 form and to check file existance; prog variable
	removed, all references changed to real_path variable.
	Do not inherit parent's window station/desktop on sexecXX calls.
	They are no longer needed with the new signal handling.
	(_spawnve): extra file existance check removed
	* winsup.h: file_exists prototype removed

Wed Nov 19 16:23:47 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* cygwin.din: add missing exports for random -- initstate
	and setstate (accessed by gawk among others?)

Tue Nov 18 22:27:10 1997  Geoffrey Noer  <[e-mail]>

	* Makefile.in: Add spaces after colons in rules for make

Mon Nov 17 22:35:25 1997  Geoffrey Noer  <[e-mail]>

        patch from [e-mail] (Chris Provenzano):
        * Makefile.in: set SHELL = @SHELL@, set VPATH to only @srcdir@.
	Remove mingw from directories to build for now, adapt rules
	for building sysdef files without fancy VPATH
        * configure: regenerate
	* config/i386/makefrag: add rules to build setjmp/longjmp
	* regexp/Makefile.in: set SHELL = @SHELL@
	* regexp/configure: regenerate
	* utils/Makefile.in: set SHELL = @SHELL@
	* utils/configure: regenerate

Mon Nov 17 18:36:50 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* fhandler.cc (fhandler_disk_file::open): calls to symlink_XXX
	replaced with path_conv class calls.
	* path.cc (path_conv::path_conv): comments added, O_NOSYMLINK case
	added.
	* path.h (class path_conv): symlink_p, exec_p - new class members.
	* spawn.cc (spawn_guts): call path_conv instead of symlink_follow.

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* dcrt0.cc (do_exit): Use new pinfo element in debug statement.
	* pinfo.cc (pinfo_init): Eliminate use of "PID" environment
	variable in favor of scanning the process table for a
	SpawnedProcessId field matching current windows process id.
	Should speed up spawned process startup slightly.  Delay setting
	of dwProcessId until process is capable of processing signals
	since this field is used to build signal semaphores.
	* signal.cc (kill_worker): Perform a `proc_exists' on the pid
	in question if signal == 0.  This will verify that the process
	actually exists and was not abnormally terminated.
	* sigproc.cc (sigproc_init): Initialize dwProcessId field after
	signal processing has been initialized.
	(sigproc_terminate): Remove events[0] close.
	(getsem): Use GetCurrentProcessId to find the windows pid since
	this dwProcessId field is not yet set up.  Use proc_exists to
	determine if error should be printed on OpenSemaphore error.
	(proc_exists): New function.  Makes more exhaustive test of
	process existence.  Determines if process died without going
	through normal shutdown.
	(wait_subproc): Close wakeup event only on thread exit.
	* spawn.cc: Remove pExeced.  Use new field in pinfo.
	(spawn_guts): Initialize dwSpawnedProcessId field.
	* utils/ps.cc (main): Perform a kill(pid, 0) on any pids that
	appear to be active.  This will clear out pids that have died
	abnormally.  'ps -f' bypasses this.
	* winsup.h (class pinfo): Add dwSpawnedProcessId field.
	
Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* pinfo.cc ((pinfo_init): use dwProcessId for execed/spawned
	check, set subproc_ready event only if the process is exec'ed.
	* spawn.cc (spawn_guts): initialize hProcess and dwProcessId
	fields of pinfo on exec, keep progname field on spawn.

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* dcrt0.cc: remove commented out code
	* spawn.cc: fix misapplied patch problem

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* fhandler.cc (fhandler_dev_null::open): Open Windows 'nul'
	device rather than "faking" a real open.
	(fhandler_dev_null::close): delete.
	(fhandler_dev_null::fstat): delete.
	(fhandler_dev_null::ioctl): delete.
	(fhandler_dev_null::read): delete.
	(fhandler_dev_null::write): delete.
	(fhandler_dev_null::lseek): delete.
	(fhandler_dev_null::dup): delete.
	* fhandler.h (class fhandler_base): delete above methods from
	class.
	* hinfo.cc (hinfo_vec::build_fhandler): Use new fhandler_dev_null
	class which opens 'nul' device.  Treat /dev/null similarly to
	other Windows devices.  This allows redirection of /dev/null to
	non-cygwin processes.

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
	* dcrt0.cc (do_exit): Use EXIT_* flags to determine how exit
	should proceed.  Honor new EXIT_NOCLOSEALL to avoid
	close_all_files.
	* exceptions.cc (__cygwin32_exception_handler): Use new
	EXIT_SIGNAL define to indicate exiting due to signal.
	* signal.cc (sigprocmask): Slightly more defensive check against
	being called prior to complete cygwin setup.
	(_raise): Defensive check to guard against being called prior to
	complete cygwin setup.
	* sigproc.cc (stopped_or_terminated): Use new EXIT_SIGNAL define
	to detect exiting due to signal.
	* sigproc.h: Define flags to be used during exit process as
	EXIT_*.
	* spawn.cc (spawn_guts): Use EXIT_* constants to control how
	do_exit proceeds after _P_OVERLAY.

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

	* sysconf.cc (sysconf): return 1048576 for ARG_MAX until
	we figure out the right value (_POSIX_ARG_MAX is only 4K
	which is too small).

Sun Nov 16 15:54:27 1997  Geoffrey Noer  <[e-mail]>

        patch from [e-mail] (Sergey Okhapkin):
        * dcrt0.cc (dll_crt0_1): call winsock_init if neccesary.
        * fhandler.cc ((fhandler_socket::fhandler_socket): moved to net.cc
        * fhandler.h (class fhandler_socket): destructor prototype added.
        * fork.cc (cygwin_fork_helper1): set PID_SOCKETS_USED in the
        child's pinfo if parent has open socket descriptors; call
        winsock_init in child code if necessary.
        * net.cc: static variable winsock_init_p removed;
        number_of_sockets is new global variable containing number of
        opened sockets.
        (winsock_init): made global, save "winsock inited" flag in process
        state field.
        (cygwin32_winsock calls): condition for winsock initialisation
        changed
        (fhandler_socket::fhandler_socket): new, moved from fhandler.cc;
        increment number_of_sockets on constructor call.
        (fhandler_socket::~fhandler_socket): new.  Decrement
        number_of_sockets on destructor call, check for negative value.
        (fhandler_socket::ioctl): check for winsock initialisation added.
        * spawn.cc (spawn_guts): handle PID_SOCKETS_USED in child's pinfo.
        * winsup.h: PID_SOCKETS_USED - new enum value; number_of_sockets
	and winsock_init() prototypes added.

Wed Nov 12 23:02:34 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
        * exceptions.cc: Substitute do_exit for _exit as appropriate.
        do_exit allows full 32 bits of exit value.  The upper 16 bits
        are used for special cygwin operations.
        * winsup.h: Change definition of do_exit to allow calling from
        signal handler.
        * dcrt0.cc (do_exit): Change to allow calling from signal handler
        in place of _exit.  This is necessary to ensure that only cygwin
        internal applications can exit with the upper order 16 bits set
        to non-zero.

Wed Nov 12 23:02:34 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Chris Faylor):
        * dcrt0.cc (do_exit): New function.  Subsumes functionality of
	_exit but takes a DWORD argument.  Changed to avoid some shutdown
	activities when called with REPARENTING bit set in argument.  Also
	explicitly kills any executing non-cygwin subprocess from a
	spawn(P_OVERLAY)...
        (_exit): Use do_exit for exiting.  Ensure that only low order 1
        bits of status are used or confusion will result if exiting with
        some higher order bits set.
        * exceptions.cc (set_process_mask): Reflect new method for
	sig_send to send signals to self.
        (handle_sigsuspend): Reflect new method for sig_send to send
	signals to self.
        * fork.cc: A handle name was changed in the pinfo structure to
        be more reflective of its use.  Change forkee_stopped to
        subproc_ready everywhere.
        * pinfo.cc (pinfo::clearout): Change forkee_stopped to
	subproc_ready.
        (pinfo_init): Use PID_EXECED flag to determine if this process has
        been execed.  If so, signal the remaining stub in the process
	which invoked us so that the stub can terminate and let us take
	over as this pid.
        * sigproc.cc (sig_send): Change method for determining if sending
        signals to myself.  A NULL pointer means communicate with my
        signal handler.  This is necessary to allow communication with
        our own signal processors after reparenting an execed process.
        Also, add an additional test to detect if a process goes away in
        the middle of attempting to send it a signal.
        (allow_sig_dispatch): Reflect new method for sig_send to send
	signals to self.
        (getsem): Use dwProcessId in names for signal semaphores.  Allows
        communicating with both parts of a process that is temporarily
        "split in two" while execing.
        (sig_proc): Avoid printing an error if WAIT_FAILED and exiting
        anyway.  Process requests even if loop_wait == 0.
        (proc_subproc): Defensive check for manipulating processes prior
        to initialization or after terminating sigproc.
        Use different check for subprocesses that have been reparented.
        Hopefully this will eliminate WFSO, error 6 problems.
        (wait_subproc): Only exit when loop_wait == 0 and not dealing with
        a process.
        * spawn.cc: Set up two global variables, used on exit when
        execing a non-cygwin process: hExeced - handle of non-cygwin
	process which is being waited for by a stub, pExeced - windows pid
	of the process.
        (spawn_guts): Reorganize to always (temporarily) wait for the new
        process when P_OVERLAY.  If a cygwin process is invoked, then the
        wait will return when an event is signalled and the new process
	will be "reparented" in the ppid.  If a non-cygwin process is
	invoked, wait until the process exits or a signal is received
	which terminates the process.  In this case, the do_exit function
	will terminate the non-cygwin process.
        * winsup.h: Rename forkee_stopped to subproc_ready since this
	event now has a dual role which is better defined by this new
	name.  Add a new flag (PID_EXECED) for process_state.  Define a
	new function `do_exit' which operates similarly to _exit
        but takes > 16 quantities with the high order bit signifying
	different exit actions.

Mon Nov 10 17:11:08 1997  Geoffrey Noer  <[e-mail]>

        * include/utime.h: remove (moved to newlib/libc/sys/cygwin32/sys)
        so as not to conflict with the one in newlib/libc/include.

Mon Nov 10 15:11:42 1997  Geoffrey Noer  <[e-mail]>

	patch from [e-mail] (Sergey Okhapkin):
	* exceptions.cc (__cygwin32_exception_handler): exit with
	"core dumped" exit code after writing "core" file.

Mon Nov 10 15:11:42 1997  Geoffrey Noer  <[e-mail]>