1 /* Process support for Windows NT port of XEMACS.
2 Copyright (C) 1992, 1995 Free Software Foundation, Inc.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA.
21 Drew Bliss Oct 14, 1993
22 Adapted from alarm.c by Tim Fleehart */
24 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
25 /* Synced with FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> */
34 /* must include CRT headers *before* config.h */
35 /* #### I don't believe it - martin */
44 #include <sys/socket.h>
51 #include "ntheap.h" /* From 19.34.6 */
53 #include "syssignal.h"
59 #include "console-msw.h"
61 /*#include "w32term.h"*/ /* From 19.34.6: sync in ? --marcpa */
63 /* #### I'm not going to play with shit. */
64 #pragma warning (disable:4013 4024 4090)
66 /* Control whether spawnve quotes arguments as necessary to ensure
67 correct parsing by child process. Because not all uses of spawnve
68 are careful about constructing argv arrays, we make this behavior
69 conditional (off by default). */
70 Lisp_Object Vwin32_quote_process_args;
72 /* Control whether create_child causes the process' window to be
73 hidden. The default is nil. */
74 Lisp_Object Vwin32_start_process_show_window;
76 /* Control whether create_child causes the process to inherit Emacs'
77 console window, or be given a new one of its own. The default is
78 nil, to allow multiple DOS programs to run on Win95. Having separate
79 consoles also allows Emacs to cleanly terminate process groups. */
80 Lisp_Object Vwin32_start_process_share_console;
82 /* Time to sleep before reading from a subprocess output pipe - this
83 avoids the inefficiency of frequently reading small amounts of data.
84 This is primarily necessary for handling DOS processes on Windows 95,
85 but is useful for Win32 processes on both Win95 and NT as well. */
86 Lisp_Object Vwin32_pipe_read_delay;
88 /* Control whether stat() attempts to generate fake but hopefully
89 "accurate" inode values, by hashing the absolute truenames of files.
90 This should detect aliasing between long and short names, but still
91 allows the possibility of hash collisions. */
92 Lisp_Object Vwin32_generate_fake_inodes;
94 Lisp_Object Qhigh, Qlow;
96 extern Lisp_Object Vlisp_EXEC_SUFFIXES;
101 void _DebPrint (const char *fmt, ...)
107 va_start (args, fmt);
108 vsprintf (buf, fmt, args);
110 OutputDebugString (buf);
114 /* sys_signal moved to nt.c. It's now called msw_signal... */
116 /* Defined in <process.h> which conflicts with the local copy */
119 /* Child process management list. */
120 int child_proc_count = 0;
121 child_process child_procs[ MAX_CHILDREN ];
122 child_process *dead_child = NULL;
124 DWORD WINAPI reader_thread (void *arg);
126 /* Find an unused process slot. */
133 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
134 if (!CHILD_ACTIVE (cp))
136 if (child_proc_count == MAX_CHILDREN)
138 cp = &child_procs[child_proc_count++];
144 if (cp->procinfo.hProcess)
145 CloseHandle(cp->procinfo.hProcess);
146 cp->procinfo.hProcess = NULL;
147 cp->status = STATUS_READ_ERROR;
149 /* use manual reset event so that select() will function properly */
150 cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL);
153 cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL);
154 if (cp->char_consumed)
156 cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id);
166 delete_child (child_process *cp)
170 /* Should not be deleting a child that is still needed. */
171 for (i = 0; i < MAXDESC; i++)
172 if (fd_info[i].cp == cp)
175 if (!CHILD_ACTIVE (cp))
178 /* reap thread if necessary */
183 if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE)
185 /* let the thread exit cleanly if possible */
186 cp->status = STATUS_READ_ERROR;
187 SetEvent (cp->char_consumed);
188 if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0)
190 DebPrint (("delete_child.WaitForSingleObject (thread) failed "
191 "with %lu for fd %ld\n", GetLastError (), cp->fd));
192 TerminateThread (cp->thrd, 0);
195 CloseHandle (cp->thrd);
200 CloseHandle (cp->char_avail);
201 cp->char_avail = NULL;
203 if (cp->char_consumed)
205 CloseHandle (cp->char_consumed);
206 cp->char_consumed = NULL;
209 /* update child_proc_count (highest numbered slot in use plus one) */
210 if (cp == child_procs + child_proc_count - 1)
212 for (i = child_proc_count-1; i >= 0; i--)
213 if (CHILD_ACTIVE (&child_procs[i]))
215 child_proc_count = i + 1;
220 child_proc_count = 0;
223 /* Find a child by pid. */
224 static child_process *
225 find_child_pid (DWORD pid)
229 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
230 if (CHILD_ACTIVE (cp) && pid == cp->pid)
235 /* Function to do blocking read of one byte, needed to implement
236 select. It is only allowed on sockets and pipes. */
238 _sys_read_ahead (int fd)
243 if (fd < 0 || fd >= MAXDESC)
244 return STATUS_READ_ERROR;
248 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
249 return STATUS_READ_ERROR;
251 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0
252 || (fd_info[fd].flags & FILE_READ) == 0)
254 /* fd is not a pipe or socket */
258 cp->status = STATUS_READ_IN_PROGRESS;
260 if (fd_info[fd].flags & FILE_PIPE)
262 rc = _read (fd, &cp->chr, sizeof (char));
264 /* Give subprocess time to buffer some more output for us before
265 reporting that input is available; we need this because Win95
266 connects DOS programs to pipes by making the pipe appear to be
267 the normal console stdout - as a result most DOS programs will
268 write to stdout without buffering, ie. one character at a
269 time. Even some Win32 programs do this - "dir" in a command
270 shell on NT is very slow if we don't do this. */
273 int wait = XINT (Vwin32_pipe_read_delay);
279 /* Yield remainder of our time slice, effectively giving a
280 temporary priority boost to the child process. */
285 if (rc == sizeof (char))
286 cp->status = STATUS_READ_SUCCEEDED;
288 cp->status = STATUS_READ_FAILED;
293 /* Thread proc for child process and socket reader threads. Each thread
294 is normally blocked until woken by select() to check for input by
295 reading one char. When the read completes, char_avail is signalled
296 to wake up the select emulator and the thread blocks itself again. */
298 reader_thread (void *arg)
303 cp = (child_process *)arg;
305 /* <matts@tibco.com> - I think the test below is wrong - we don't
306 want to wait for someone to signal char_consumed, as we haven't
307 read anything for them to consume yet! */
311 WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
323 rc = _sys_read_ahead (cp->fd);
325 /* The name char_avail is a misnomer - it really just means the
326 read-ahead has completed, whether successfully or not. */
327 if (!SetEvent (cp->char_avail))
329 DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n",
330 GetLastError (), cp->fd));
334 if (rc == STATUS_READ_ERROR)
336 /* We are finished, so clean up handles and set to NULL so
337 that CHILD_ACTIVE will see what is going on */
338 if (cp->char_avail) {
339 CloseHandle (cp->char_avail);
340 cp->char_avail = NULL;
343 CloseHandle (cp->thrd);
346 if (cp->char_consumed) {
347 CloseHandle(cp->char_consumed);
348 cp->char_consumed = NULL;
350 if (cp->procinfo.hProcess)
352 CloseHandle (cp->procinfo.hProcess);
353 cp->procinfo.hProcess=NULL;
358 /* If the read died, the child has died so let the thread die */
359 if (rc == STATUS_READ_FAILED)
362 /* Wait until our input is acknowledged before reading again */
363 if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
365 DebPrint (("reader_thread.WaitForSingleObject failed with "
366 "%lu for fd %ld\n", GetLastError (), cp->fd));
370 /* We are finished, so clean up handles and set to NULL so that
371 CHILD_ACTIVE will see what is going on */
372 if (cp->char_avail) {
373 CloseHandle (cp->char_avail);
374 cp->char_avail = NULL;
377 CloseHandle (cp->thrd);
380 if (cp->char_consumed) {
381 CloseHandle(cp->char_consumed);
382 cp->char_consumed = NULL;
384 if (cp->procinfo.hProcess)
386 CloseHandle (cp->procinfo.hProcess);
387 cp->procinfo.hProcess=NULL;
393 /* To avoid Emacs changing directory, we just record here the directory
394 the new process should start in. This is set just before calling
395 sys_spawnve, and is not generally valid at any other time. */
396 static const char * process_dir;
399 create_child (const char *exe, char *cmdline, char *env,
400 int * pPid, child_process *cp)
403 SECURITY_ATTRIBUTES sec_attrs;
404 SECURITY_DESCRIPTOR sec_desc;
405 char dir[ MAXPATHLEN ];
407 if (cp == NULL) abort ();
410 start.cb = sizeof (start);
412 if (NILP (Vwin32_start_process_show_window))
413 start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
415 start.dwFlags = STARTF_USESTDHANDLES;
416 start.wShowWindow = SW_HIDE;
418 start.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
419 start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
420 start.hStdError = GetStdHandle (STD_ERROR_HANDLE);
422 /* Explicitly specify no security */
423 if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION))
425 if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE))
427 sec_attrs.nLength = sizeof (sec_attrs);
428 sec_attrs.lpSecurityDescriptor = &sec_desc;
429 sec_attrs.bInheritHandle = FALSE;
431 strcpy (dir, process_dir);
432 unixtodos_filename (dir);
434 if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE,
435 (!NILP (Vwin32_start_process_share_console)
436 ? CREATE_NEW_PROCESS_GROUP
437 : CREATE_NEW_CONSOLE),
439 &start, &cp->procinfo))
442 cp->pid = (int) cp->procinfo.dwProcessId;
444 CloseHandle (cp->procinfo.hThread);
445 CloseHandle (cp->procinfo.hProcess);
446 cp->procinfo.hThread=NULL;
447 cp->procinfo.hProcess=NULL;
449 /* pid must fit in a Lisp_Int */
457 DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError()););
462 merge_and_sort_env (char **envp1, char **envp2, char **new_envp)
478 qsort (new_envp, num, sizeof (char*), compare_env);
483 /* When a new child process is created we need to register it in our list,
484 so intercept spawn requests. */
486 sys_spawnve (int mode, const char *cmdname,
487 const char * const *argv, const char *const *envp)
489 Lisp_Object program, full;
490 char *cmdline, *env, *parg, **targ;
494 int is_dos_app, is_cygnus_app;
496 char escape_char = 0;
497 /* We pass our process ID to our children by setting up an environment
498 variable in their environment. */
499 char ppid_env_var_buffer[64];
500 char *extra_env[] = {ppid_env_var_buffer, NULL};
503 /* We don't care about the other modes */
504 if (mode != _P_NOWAIT)
510 /* Handle executable names without an executable suffix. */
511 program = make_string (cmdname, strlen (cmdname));
513 if (NILP (Ffile_executable_p (program)))
516 locate_file (Vexec_path, program, Vlisp_EXEC_SUFFIXES, &full, 1);
523 TO_EXTERNAL_FORMAT (LISP_STRING, full,
524 C_STRING_ALLOCA, cmdname,
529 cmdname = (char*)alloca (strlen (argv[0]) + 1);
530 strcpy ((char*)cmdname, argv[0]);
534 /* make sure argv[0] and cmdname are both in DOS format */
535 unixtodos_filename ((char*)cmdname);
537 ((const char**)argv)[0] = cmdname;
539 /* Determine whether program is a 16-bit DOS executable, or a Win32
540 executable that is implicitly linked to the Cygnus dll (implying it
541 was compiled with the Cygnus GNU toolchain and hence relies on
542 cygwin.dll to parse the command line - we use this to decide how to
543 escape quote chars in command line args that must be quoted). */
544 mswindows_executable_type (cmdname, &is_dos_app, &is_cygnus_app);
546 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
547 application to start it by specifying the helper app as cmdname,
548 while leaving the real app name as argv[0]. */
551 cmdname = (char*) alloca (MAXPATHLEN);
552 if (egetenv ("CMDPROXY"))
553 strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
556 strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
557 strcat ((char*)cmdname, "cmdproxy.exe");
559 unixtodos_filename ((char*)cmdname);
562 /* we have to do some conjuring here to put argv and envp into the
563 form CreateProcess wants... argv needs to be a space separated/null
564 terminated list of parameters, and envp is a null
565 separated/double-null terminated list of parameters.
567 Additionally, zero-length args and args containing whitespace or
568 quote chars need to be wrapped in double quotes - for this to work,
569 embedded quotes need to be escaped as well. The aim is to ensure
570 the child process reconstructs the argv array we start with
571 exactly, so we treat quotes at the beginning and end of arguments
574 The Win32 GNU-based library from Cygnus doubles quotes to escape
575 them, while MSVC uses backslash for escaping. (Actually the MSVC
576 startup code does attempt to recognize doubled quotes and accept
577 them, but gets it wrong and ends up requiring three quotes to get a
578 single embedded quote!) So by default we decide whether to use
579 quote or backslash as the escape character based on whether the
580 binary is apparently a Cygnus compiled app.
582 Note that using backslash to escape embedded quotes requires
583 additional special handling if an embedded quote is already
584 preceded by backslash, or if an arg requiring quoting ends with
585 backslash. In such cases, the run of escape characters needs to be
586 doubled. For consistency, we apply this special handling as long
587 as the escape character is not quote.
589 Since we have no idea how large argv and envp are likely to be we
590 figure out list lengths on the fly and allocate them. */
592 if (!NILP (Vwin32_quote_process_args))
595 /* Override escape char by binding win32-quote-process-args to
596 desired character, or use t for auto-selection. */
597 if (INTP (Vwin32_quote_process_args))
598 escape_char = (char) XINT (Vwin32_quote_process_args);
600 escape_char = is_cygnus_app ? '"' : '\\';
610 int escape_char_run = 0;
618 /* allow for embedded quotes to be escaped */
621 /* handle the case where the embedded quote is already escaped */
622 if (escape_char_run > 0)
624 /* To preserve the arg exactly, we need to double the
625 preceding escape characters (plus adding one to
626 escape the quote character itself). */
627 arglen += escape_char_run;
630 else if (*p == ' ' || *p == '\t')
635 if (*p == escape_char && escape_char != '"')
643 /* handle the case where the arg ends with an escape char - we
644 must not let the enclosing quote be escaped. */
645 if (escape_char_run > 0)
646 arglen += escape_char_run;
648 arglen += strlen (*targ++) + 1;
650 cmdline = (char*) alloca (arglen);
664 if (*p == ' ' || *p == '\t' || *p == '"')
669 int escape_char_run = 0;
675 last = p + strlen (p) - 1;
678 /* This version does not escape quotes if they occur at the
679 beginning or end of the arg - this could lead to incorrect
680 behavior when the arg itself represents a command line
681 containing quoted args. I believe this was originally done
682 as a hack to make some things work, before
683 `win32-quote-process-args' was added. */
686 if (*p == '"' && p > first && p < last)
687 *parg++ = escape_char; /* escape embedded quotes */
695 /* double preceding escape chars if any */
696 while (escape_char_run > 0)
698 *parg++ = escape_char;
701 /* escape all quote chars, even at beginning or end */
702 *parg++ = escape_char;
706 if (*p == escape_char && escape_char != '"')
711 /* double escape chars before enclosing quote */
712 while (escape_char_run > 0)
714 *parg++ = escape_char;
722 strcpy (parg, *targ);
723 parg += strlen (*targ);
732 targ = (char**) envp;
733 numenv = 1; /* for end null */
736 arglen += strlen (*targ++) + 1;
739 /* extra env vars... */
740 sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
741 GetCurrentProcessId ());
742 arglen += strlen (ppid_env_var_buffer) + 1;
745 /* merge env passed in and extra env into one, and sort it. */
746 targ = (char **) alloca (numenv * sizeof (char*));
747 merge_and_sort_env ((char**) envp, extra_env, targ);
749 /* concatenate env entries. */
750 env = (char*) alloca (arglen);
754 strcpy (parg, *targ);
755 parg += strlen (*targ++);
768 /* Now create the process. */
769 if (!create_child (cmdname, cmdline, env, &pid, cp))
779 /* Substitute for certain kill () operations */
782 find_child_console (HWND hwnd, child_process * cp)
787 thread_id = GetWindowThreadProcessId (hwnd, &process_id);
788 if (process_id == cp->procinfo.dwProcessId)
790 char window_class[32];
792 GetClassName (hwnd, window_class, sizeof (window_class));
793 if (strcmp (window_class,
796 : "ConsoleWindowClass") == 0)
807 sys_kill (int pid, int sig)
811 int need_to_free = 0;
814 /* Only handle signals that will result in the process dying */
815 if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP)
821 cp = find_child_pid (pid);
824 proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid);
825 if (proc_hand == NULL)
834 proc_hand = cp->procinfo.hProcess;
835 pid = cp->procinfo.dwProcessId;
837 /* Try to locate console window for process. */
838 EnumWindows ((WNDENUMPROC)find_child_console, (LPARAM) cp);
843 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
845 BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
846 BYTE vk_break_code = VK_CANCEL;
847 BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
848 HWND foreground_window;
850 if (break_scan_code == 0)
852 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
854 break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
857 foreground_window = GetForegroundWindow ();
858 if (foreground_window && SetForegroundWindow (cp->hwnd))
860 /* Generate keystrokes as if user had typed Ctrl-Break or Ctrl-C. */
861 keybd_event (VK_CONTROL, control_scan_code, 0, 0);
862 keybd_event (vk_break_code, break_scan_code, 0, 0);
863 keybd_event (vk_break_code, break_scan_code, KEYEVENTF_KEYUP, 0);
864 keybd_event (VK_CONTROL, control_scan_code, KEYEVENTF_KEYUP, 0);
866 /* Sleep for a bit to give time for Emacs frame to respond
867 to focus change events (if Emacs was active app). */
870 SetForegroundWindow (foreground_window);
873 /* Ctrl-Break is NT equivalent of SIGINT. */
874 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
876 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
877 "for pid %lu\n", GetLastError (), pid));
884 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
887 if (msw_windows9x_p())
890 Another possibility is to try terminating the VDM out-right by
891 calling the Shell VxD (id 0x17) V86 interface, function #4
892 "SHELL_Destroy_VM", ie.
898 First need to determine the current VM handle, and then arrange for
899 the shellapi call to be made from the system vm (by using
900 Switch_VM_and_callback).
902 Could try to invoke DestroyVM through CallVxD.
906 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
907 to hang when cmdproxy is used in conjunction with
908 command.com for an interactive shell. Posting
909 WM_CLOSE pops up a dialog that, when Yes is selected,
910 does the same thing. TerminateProcess is also less
911 than ideal in that subprocesses tend to stick around
912 until the machine is shutdown, but at least it
913 doesn't freeze the 16-bit subsystem. */
914 PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
916 if (!TerminateProcess (proc_hand, 0xff))
918 DebPrint (("sys_kill.TerminateProcess returned %d "
919 "for pid %lu\n", GetLastError (), pid));
926 PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
928 /* Kill the process. On Win32 this doesn't kill child processes
929 so it doesn't work very well for shells which is why it's not
930 used in every case. */
931 else if (!TerminateProcess (proc_hand, 0xff))
933 DebPrint (("sys_kill.TerminateProcess returned %d "
934 "for pid %lu\n", GetLastError (), pid));
941 CloseHandle (proc_hand);
947 /* Sync with FSF Emacs 19.34.6 note: ifdef'ed out in XEmacs */
948 extern int report_file_error (const char *, Lisp_Object);
950 /* The following two routines are used to manipulate stdin, stdout, and
951 stderr of our child processes.
953 Assuming that in, out, and err are *not* inheritable, we make them
954 stdin, stdout, and stderr of the child as follows:
956 - Save the parent's current standard handles.
957 - Set the std handles to inheritable duplicates of the ones being passed in.
958 (Note that _get_osfhandle() is an io.h procedure that retrieves the
959 NT file handle for a crt file descriptor.)
960 - Spawn the child, which inherits in, out, and err as stdin,
961 stdout, and stderr. (see Spawnve)
962 - Close the std handles passed to the child.
963 - Reset the parent's standard handles to the saved handles.
964 (see reset_standard_handles)
965 We assume that the caller closes in, out, and err after calling us. */
968 prepare_standard_handles (int in, int out, int err, HANDLE handles[3])
971 HANDLE newstdin, newstdout, newstderr;
973 parent = GetCurrentProcess ();
975 handles[0] = GetStdHandle (STD_INPUT_HANDLE);
976 handles[1] = GetStdHandle (STD_OUTPUT_HANDLE);
977 handles[2] = GetStdHandle (STD_ERROR_HANDLE);
979 /* make inheritable copies of the new handles */
980 if (!DuplicateHandle (parent,
981 (HANDLE) _get_osfhandle (in),
986 DUPLICATE_SAME_ACCESS))
987 report_file_error ("Duplicating input handle for child", Qnil);
989 if (!DuplicateHandle (parent,
990 (HANDLE) _get_osfhandle (out),
995 DUPLICATE_SAME_ACCESS))
996 report_file_error ("Duplicating output handle for child", Qnil);
998 if (!DuplicateHandle (parent,
999 (HANDLE) _get_osfhandle (err),
1004 DUPLICATE_SAME_ACCESS))
1005 report_file_error ("Duplicating error handle for child", Qnil);
1007 /* and store them as our std handles */
1008 if (!SetStdHandle (STD_INPUT_HANDLE, newstdin))
1009 report_file_error ("Changing stdin handle", Qnil);
1011 if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout))
1012 report_file_error ("Changing stdout handle", Qnil);
1014 if (!SetStdHandle (STD_ERROR_HANDLE, newstderr))
1015 report_file_error ("Changing stderr handle", Qnil);
1019 reset_standard_handles (int in, int out, int err, HANDLE handles[3])
1021 /* close the duplicated handles passed to the child */
1022 CloseHandle (GetStdHandle (STD_INPUT_HANDLE));
1023 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE));
1024 CloseHandle (GetStdHandle (STD_ERROR_HANDLE));
1026 /* now restore parent's saved std handles */
1027 SetStdHandle (STD_INPUT_HANDLE, handles[0]);
1028 SetStdHandle (STD_OUTPUT_HANDLE, handles[1]);
1029 SetStdHandle (STD_ERROR_HANDLE, handles[2]);
1033 set_process_dir (const char * dir)
1038 /* Some miscellaneous functions that are Windows specific, but not GUI
1039 specific (ie. are applicable in terminal or batch mode as well). */
1041 /* lifted from fileio.c */
1042 #define CORRECT_DIR_SEPS(s) \
1043 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
1044 else unixtodos_filename (s); \
1047 DEFUN ("win32-short-file-name", Fwin32_short_file_name, 1, 1, "", /*
1048 Return the short file name version (8.3) of the full path of FILENAME.
1049 If FILENAME does not exist, return nil.
1050 All path elements in FILENAME are converted to their short names.
1054 char shortname[MAX_PATH];
1056 CHECK_STRING (filename);
1058 /* first expand it. */
1059 filename = Fexpand_file_name (filename, Qnil);
1061 /* luckily, this returns the short version of each element in the path. */
1062 if (GetShortPathName (XSTRING_DATA (filename), shortname, MAX_PATH) == 0)
1065 CORRECT_DIR_SEPS (shortname);
1067 return build_string (shortname);
1071 DEFUN ("win32-long-file-name", Fwin32_long_file_name, 1, 1, "", /*
1072 Return the long file name version of the full path of FILENAME.
1073 If FILENAME does not exist, return nil.
1074 All path elements in FILENAME are converted to their long names.
1078 char longname[ MAX_PATH ];
1080 CHECK_STRING (filename);
1082 /* first expand it. */
1083 filename = Fexpand_file_name (filename, Qnil);
1085 if (!win32_get_long_filename (XSTRING_DATA (filename), longname, MAX_PATH))
1088 CORRECT_DIR_SEPS (longname);
1090 return build_string (longname);
1093 DEFUN ("win32-set-process-priority", Fwin32_set_process_priority, 2, 2, "", /*
1094 Set the priority of PROCESS to PRIORITY.
1095 If PROCESS is nil, the priority of Emacs is changed, otherwise the
1096 priority of the process whose pid is PROCESS is changed.
1097 PRIORITY should be one of the symbols high, normal, or low;
1098 any other symbol will be interpreted as normal.
1100 If successful, the return value is t, otherwise nil.
1102 (process, priority))
1104 HANDLE proc_handle = GetCurrentProcess ();
1105 DWORD priority_class = NORMAL_PRIORITY_CLASS;
1106 Lisp_Object result = Qnil;
1108 CHECK_SYMBOL (priority);
1110 if (!NILP (process))
1115 CHECK_INT (process);
1117 /* Allow pid to be an internally generated one, or one obtained
1118 externally. This is necessary because real pids on Win95 are
1121 pid = XINT (process);
1122 cp = find_child_pid (pid);
1124 pid = cp->procinfo.dwProcessId;
1126 proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid);
1129 if (EQ (priority, Qhigh))
1130 priority_class = HIGH_PRIORITY_CLASS;
1131 else if (EQ (priority, Qlow))
1132 priority_class = IDLE_PRIORITY_CLASS;
1134 if (proc_handle != NULL)
1136 if (SetPriorityClass (proc_handle, priority_class))
1138 if (!NILP (process))
1139 CloseHandle (proc_handle);
1146 DEFUN ("win32-get-locale-info", Fwin32_get_locale_info, 1, 2, "", /*
1147 "Return information about the Windows locale LCID.
1148 By default, return a three letter locale code which encodes the default
1149 language as the first two characters, and the country or regional variant
1150 as the third letter. For example, ENU refers to `English (United States)',
1151 while ENC means `English (Canadian)'.
1153 If the optional argument LONGFORM is non-nil, the long form of the locale
1154 name is returned, e.g. `English (United States)' instead.
1156 If LCID (a 16-bit number) is not a valid locale, the result is nil.
1162 char abbrev_name[32] = { 0 };
1163 char full_name[256] = { 0 };
1167 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1170 if (NILP (longform))
1172 got_abbrev = GetLocaleInfo (XINT (lcid),
1173 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
1174 abbrev_name, sizeof (abbrev_name));
1176 return build_string (abbrev_name);
1180 got_full = GetLocaleInfo (XINT (lcid),
1181 LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP,
1182 full_name, sizeof (full_name));
1184 return build_string (full_name);
1191 DEFUN ("win32-get-current-locale-id", Fwin32_get_current_locale_id, 0, 0, "", /*
1192 "Return Windows locale id for current locale setting.
1193 This is a numerical value; use `win32-get-locale-info' to convert to a
1194 human-readable form.
1198 return make_int (GetThreadLocale ());
1202 DEFUN ("win32-get-default-locale-id", Fwin32_get_default_locale_id, 0, 1, "", /*
1203 "Return Windows locale id for default locale setting.
1204 By default, the system default locale setting is returned; if the optional
1205 parameter USERP is non-nil, the user default locale setting is returned.
1206 This is a numerical value; use `win32-get-locale-info' to convert to a
1207 human-readable form.
1212 return make_int (GetSystemDefaultLCID ());
1213 return make_int (GetUserDefaultLCID ());
1216 DWORD int_from_hex (char * s)
1219 static char hex[] = "0123456789abcdefABCDEF";
1222 while (*s && (p = strchr(hex, *s)) != NULL)
1224 unsigned digit = p - hex;
1227 val = val * 16 + digit;
1233 /* We need to build a global list, since the EnumSystemLocale callback
1234 function isn't given a context pointer. */
1235 Lisp_Object Vwin32_valid_locale_ids;
1237 BOOL CALLBACK enum_locale_fn (LPTSTR localeNum)
1239 DWORD id = int_from_hex (localeNum);
1240 Vwin32_valid_locale_ids = Fcons (make_int (id), Vwin32_valid_locale_ids);
1244 DEFUN ("win32-get-valid-locale-ids", Fwin32_get_valid_locale_ids, 0, 0, "", /*
1245 Return list of all valid Windows locale ids.
1246 Each id is a numerical value; use `win32-get-locale-info' to convert to a
1247 human-readable form.
1251 Vwin32_valid_locale_ids = Qnil;
1253 EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED);
1255 Vwin32_valid_locale_ids = Fnreverse (Vwin32_valid_locale_ids);
1256 return Vwin32_valid_locale_ids;
1260 DEFUN ("win32-set-current-locale", Fwin32_set_current_locale, 1, 1, "", /*
1261 Make Windows locale LCID be the current locale setting for Emacs.
1262 If successful, the new locale id is returned, otherwise nil.
1268 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1271 if (!SetThreadLocale (XINT (lcid)))
1274 /* Sync with FSF Emacs 19.34.6 note: dwWinThreadId declared in
1275 w32term.h and defined in w32fns.c, both of which are not in current
1276 XEmacs. #### Check what we lose by ifdef'ing out these. --marcpa */
1278 /* Need to set input thread locale if present. */
1280 /* Reply is not needed. */
1281 PostThreadMessage (dwWinThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0);
1284 return make_int (GetThreadLocale ());
1289 syms_of_ntproc (void)
1291 DEFSUBR (Fwin32_short_file_name);
1292 DEFSUBR (Fwin32_long_file_name);
1293 DEFSUBR (Fwin32_set_process_priority);
1294 DEFSUBR (Fwin32_get_locale_info);
1295 DEFSUBR (Fwin32_get_current_locale_id);
1296 DEFSUBR (Fwin32_get_default_locale_id);
1297 DEFSUBR (Fwin32_get_valid_locale_ids);
1298 DEFSUBR (Fwin32_set_current_locale);
1303 vars_of_ntproc (void)
1305 defsymbol (&Qhigh, "high");
1306 defsymbol (&Qlow, "low");
1308 DEFVAR_LISP ("win32-quote-process-args", &Vwin32_quote_process_args /*
1309 Non-nil enables quoting of process arguments to ensure correct parsing.
1310 Because Windows does not directly pass argv arrays to child processes,
1311 programs have to reconstruct the argv array by parsing the command
1312 line string. For an argument to contain a space, it must be enclosed
1313 in double quotes or it will be parsed as multiple arguments.
1315 If the value is a character, that character will be used to escape any
1316 quote characters that appear, otherwise a suitable escape character
1317 will be chosen based on the type of the program.
1319 Vwin32_quote_process_args = Qt;
1321 DEFVAR_LISP ("win32-start-process-show-window",
1322 &Vwin32_start_process_show_window /*
1323 When nil, processes started via start-process hide their windows.
1324 When non-nil, they show their window in the method of their choice.
1326 Vwin32_start_process_show_window = Qnil;
1328 DEFVAR_LISP ("win32-start-process-share-console",
1329 &Vwin32_start_process_share_console /*
1330 When nil, processes started via start-process are given a new console.
1331 When non-nil, they share the Emacs console; this has the limitation of
1332 allowing only only DOS subprocess to run at a time (whether started directly
1333 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
1334 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
1335 otherwise respond to interrupts from Emacs.
1337 Vwin32_start_process_share_console = Qt;
1339 DEFVAR_LISP ("win32-pipe-read-delay", &Vwin32_pipe_read_delay /*
1340 Forced delay before reading subprocess output.
1341 This is done to improve the buffering of subprocess output, by
1342 avoiding the inefficiency of frequently reading small amounts of data.
1344 If positive, the value is the number of milliseconds to sleep before
1345 reading the subprocess output. If negative, the magnitude is the number
1346 of time slices to wait (effectively boosting the priority of the child
1347 process temporarily). A value of zero disables waiting entirely.
1349 Vwin32_pipe_read_delay = make_int (50);
1352 DEFVAR_LISP ("win32-generate-fake-inodes", &Vwin32_generate_fake_inodes /*
1353 "Non-nil means attempt to fake realistic inode values.
1354 This works by hashing the truename of files, and should detect
1355 aliasing between long and short (8.3 DOS) names, but can have
1356 false positives because of hash collisions. Note that determining
1357 the truename of a file can be slow.
1359 Vwin32_generate_fake_inodes = Qnil;
1363 /* end of ntproc.c */