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"
58 /*#include "w32term.h"*/ /* From 19.34.6: sync in ? --marcpa */
60 /* #### I'm not going to play with shit. */
61 #pragma warning (disable:4013 4024 4090)
63 /* Control whether spawnve quotes arguments as necessary to ensure
64 correct parsing by child process. Because not all uses of spawnve
65 are careful about constructing argv arrays, we make this behavior
66 conditional (off by default). */
67 Lisp_Object Vwin32_quote_process_args;
69 /* Control whether create_child causes the process' window to be
70 hidden. The default is nil. */
71 Lisp_Object Vwin32_start_process_show_window;
73 /* Control whether create_child causes the process to inherit Emacs'
74 console window, or be given a new one of its own. The default is
75 nil, to allow multiple DOS programs to run on Win95. Having separate
76 consoles also allows Emacs to cleanly terminate process groups. */
77 Lisp_Object Vwin32_start_process_share_console;
79 /* Time to sleep before reading from a subprocess output pipe - this
80 avoids the inefficiency of frequently reading small amounts of data.
81 This is primarily necessary for handling DOS processes on Windows 95,
82 but is useful for Win32 processes on both Win95 and NT as well. */
83 Lisp_Object Vwin32_pipe_read_delay;
85 /* Control whether stat() attempts to generate fake but hopefully
86 "accurate" inode values, by hashing the absolute truenames of files.
87 This should detect aliasing between long and short names, but still
88 allows the possibility of hash collisions. */
89 Lisp_Object Vwin32_generate_fake_inodes;
91 Lisp_Object Qhigh, Qlow;
93 extern Lisp_Object Vlisp_EXEC_SUFFIXES;
98 void _DebPrint (const char *fmt, ...)
104 va_start (args, fmt);
105 vsprintf (buf, fmt, args);
107 OutputDebugString (buf);
111 /* sys_signal moved to nt.c. It's now called msw_signal... */
113 /* Defined in <process.h> which conflicts with the local copy */
116 /* Child process management list. */
117 int child_proc_count = 0;
118 child_process child_procs[ MAX_CHILDREN ];
119 child_process *dead_child = NULL;
121 DWORD WINAPI reader_thread (void *arg);
123 /* Find an unused process slot. */
130 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
131 if (!CHILD_ACTIVE (cp))
133 if (child_proc_count == MAX_CHILDREN)
135 cp = &child_procs[child_proc_count++];
141 if (cp->procinfo.hProcess)
142 CloseHandle(cp->procinfo.hProcess);
143 cp->procinfo.hProcess = NULL;
144 cp->status = STATUS_READ_ERROR;
146 /* use manual reset event so that select() will function properly */
147 cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL);
150 cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL);
151 if (cp->char_consumed)
153 cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id);
163 delete_child (child_process *cp)
167 /* Should not be deleting a child that is still needed. */
168 for (i = 0; i < MAXDESC; i++)
169 if (fd_info[i].cp == cp)
172 if (!CHILD_ACTIVE (cp))
175 /* reap thread if necessary */
180 if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE)
182 /* let the thread exit cleanly if possible */
183 cp->status = STATUS_READ_ERROR;
184 SetEvent (cp->char_consumed);
185 if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0)
187 DebPrint (("delete_child.WaitForSingleObject (thread) failed "
188 "with %lu for fd %ld\n", GetLastError (), cp->fd));
189 TerminateThread (cp->thrd, 0);
192 CloseHandle (cp->thrd);
197 CloseHandle (cp->char_avail);
198 cp->char_avail = NULL;
200 if (cp->char_consumed)
202 CloseHandle (cp->char_consumed);
203 cp->char_consumed = NULL;
206 /* update child_proc_count (highest numbered slot in use plus one) */
207 if (cp == child_procs + child_proc_count - 1)
209 for (i = child_proc_count-1; i >= 0; i--)
210 if (CHILD_ACTIVE (&child_procs[i]))
212 child_proc_count = i + 1;
217 child_proc_count = 0;
220 /* Find a child by pid. */
221 static child_process *
222 find_child_pid (DWORD pid)
226 for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
227 if (CHILD_ACTIVE (cp) && pid == cp->pid)
232 /* Function to do blocking read of one byte, needed to implement
233 select. It is only allowed on sockets and pipes. */
235 _sys_read_ahead (int fd)
240 if (fd < 0 || fd >= MAXDESC)
241 return STATUS_READ_ERROR;
245 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
246 return STATUS_READ_ERROR;
248 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET)) == 0
249 || (fd_info[fd].flags & FILE_READ) == 0)
251 /* fd is not a pipe or socket */
255 cp->status = STATUS_READ_IN_PROGRESS;
257 if (fd_info[fd].flags & FILE_PIPE)
259 rc = _read (fd, &cp->chr, sizeof (char));
261 /* Give subprocess time to buffer some more output for us before
262 reporting that input is available; we need this because Win95
263 connects DOS programs to pipes by making the pipe appear to be
264 the normal console stdout - as a result most DOS programs will
265 write to stdout without buffering, ie. one character at a
266 time. Even some Win32 programs do this - "dir" in a command
267 shell on NT is very slow if we don't do this. */
270 int wait = XINT (Vwin32_pipe_read_delay);
276 /* Yield remainder of our time slice, effectively giving a
277 temporary priority boost to the child process. */
282 if (rc == sizeof (char))
283 cp->status = STATUS_READ_SUCCEEDED;
285 cp->status = STATUS_READ_FAILED;
290 /* Thread proc for child process and socket reader threads. Each thread
291 is normally blocked until woken by select() to check for input by
292 reading one char. When the read completes, char_avail is signalled
293 to wake up the select emulator and the thread blocks itself again. */
295 reader_thread (void *arg)
300 cp = (child_process *)arg;
302 /* <matts@tibco.com> - I think the test below is wrong - we don't
303 want to wait for someone to signal char_consumed, as we haven't
304 read anything for them to consume yet! */
308 WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
320 rc = _sys_read_ahead (cp->fd);
322 /* The name char_avail is a misnomer - it really just means the
323 read-ahead has completed, whether successfully or not. */
324 if (!SetEvent (cp->char_avail))
326 DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n",
327 GetLastError (), cp->fd));
331 if (rc == STATUS_READ_ERROR)
333 /* We are finished, so clean up handles and set to NULL so
334 that CHILD_ACTIVE will see what is going on */
335 if (cp->char_avail) {
336 CloseHandle (cp->char_avail);
337 cp->char_avail = NULL;
340 CloseHandle (cp->thrd);
343 if (cp->char_consumed) {
344 CloseHandle(cp->char_consumed);
345 cp->char_consumed = NULL;
347 if (cp->procinfo.hProcess)
349 CloseHandle (cp->procinfo.hProcess);
350 cp->procinfo.hProcess=NULL;
355 /* If the read died, the child has died so let the thread die */
356 if (rc == STATUS_READ_FAILED)
359 /* Wait until our input is acknowledged before reading again */
360 if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
362 DebPrint (("reader_thread.WaitForSingleObject failed with "
363 "%lu for fd %ld\n", GetLastError (), cp->fd));
367 /* We are finished, so clean up handles and set to NULL so that
368 CHILD_ACTIVE will see what is going on */
369 if (cp->char_avail) {
370 CloseHandle (cp->char_avail);
371 cp->char_avail = NULL;
374 CloseHandle (cp->thrd);
377 if (cp->char_consumed) {
378 CloseHandle(cp->char_consumed);
379 cp->char_consumed = NULL;
381 if (cp->procinfo.hProcess)
383 CloseHandle (cp->procinfo.hProcess);
384 cp->procinfo.hProcess=NULL;
390 /* To avoid Emacs changing directory, we just record here the directory
391 the new process should start in. This is set just before calling
392 sys_spawnve, and is not generally valid at any other time. */
393 static const char * process_dir;
396 create_child (CONST char *exe, char *cmdline, char *env,
397 int * pPid, child_process *cp)
400 SECURITY_ATTRIBUTES sec_attrs;
401 SECURITY_DESCRIPTOR sec_desc;
402 char dir[ MAXPATHLEN ];
404 if (cp == NULL) abort ();
407 start.cb = sizeof (start);
410 if (NILP (Vwin32_start_process_show_window))
411 start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
413 start.dwFlags = STARTF_USESTDHANDLES;
414 start.wShowWindow = SW_HIDE;
416 start.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
417 start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
418 start.hStdError = GetStdHandle (STD_ERROR_HANDLE);
419 #endif /* HAVE_NTGUI */
421 /* Explicitly specify no security */
422 if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION))
424 if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE))
426 sec_attrs.nLength = sizeof (sec_attrs);
427 sec_attrs.lpSecurityDescriptor = &sec_desc;
428 sec_attrs.bInheritHandle = FALSE;
430 strcpy (dir, process_dir);
431 unixtodos_filename (dir);
433 if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE,
434 (!NILP (Vwin32_start_process_share_console)
435 ? CREATE_NEW_PROCESS_GROUP
436 : CREATE_NEW_CONSOLE),
438 &start, &cp->procinfo))
441 cp->pid = (int) cp->procinfo.dwProcessId;
443 CloseHandle (cp->procinfo.hThread);
444 CloseHandle (cp->procinfo.hProcess);
445 cp->procinfo.hThread=NULL;
446 cp->procinfo.hProcess=NULL;
448 /* Hack for Windows 95, which assigns large (ie negative) pids */
452 /* pid must fit in a Lisp_Int */
453 #ifdef USE_UNION_TYPE
454 cp->pid = (cp->pid & ((1U << VALBITS) - 1));
456 cp->pid = (cp->pid & VALMASK);
464 DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError()););
469 /* Return pointer to section header for section containing the given
470 relative virtual address. */
471 static IMAGE_SECTION_HEADER *
472 rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header)
474 PIMAGE_SECTION_HEADER section;
477 section = IMAGE_FIRST_SECTION (nt_header);
479 for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
481 if (rva >= section->VirtualAddress
482 && rva < section->VirtualAddress + section->SizeOfRawData)
491 win32_executable_type (CONST char * filename, int * is_dos_app, int * is_cygnus_app)
493 file_data executable;
496 /* Default values in case we can't tell for sure. */
498 *is_cygnus_app = FALSE;
500 if (!open_input_file (&executable, filename))
503 p = strrchr (filename, '.');
505 /* We can only identify DOS .com programs from the extension. */
506 if (p && stricmp (p, ".com") == 0)
508 else if (p && (stricmp (p, ".bat") == 0 ||
509 stricmp (p, ".cmd") == 0))
511 /* A DOS shell script - it appears that CreateProcess is happy to
512 accept this (somewhat surprisingly); presumably it looks at
513 COMSPEC to determine what executable to actually invoke.
514 Therefore, we have to do the same here as well. */
515 /* Actually, I think it uses the program association for that
516 extension, which is defined in the registry. */
517 p = egetenv ("COMSPEC");
519 win32_executable_type (p, is_dos_app, is_cygnus_app);
523 /* Look for DOS .exe signature - if found, we must also check that
524 it isn't really a 16- or 32-bit Windows exe, since both formats
525 start with a DOS program stub. Note that 16-bit Windows
526 executables use the OS/2 1.x format. */
529 /* mingw32 doesn't have enough headers to detect cygwin
530 apps, just do what we can. */
533 exe_header = (FILHDR*) executable.file_base;
534 if (exe_header->e_magic != DOSMAGIC)
537 if ((char *) exe_header->e_lfanew > (char *) executable.size)
539 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
542 else if (exe_header->nt_signature != NT_SIGNATURE)
547 IMAGE_DOS_HEADER * dos_header;
548 IMAGE_NT_HEADERS * nt_header;
550 dos_header = (PIMAGE_DOS_HEADER) executable.file_base;
551 if (dos_header->e_magic != IMAGE_DOS_SIGNATURE)
554 nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
556 if ((char *) nt_header > (char *) dos_header + executable.size)
558 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
561 else if (nt_header->Signature != IMAGE_NT_SIGNATURE &&
562 LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE)
566 else if (nt_header->Signature == IMAGE_NT_SIGNATURE)
568 /* Look for cygwin.dll in DLL import list. */
569 IMAGE_DATA_DIRECTORY import_dir =
570 nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
571 IMAGE_IMPORT_DESCRIPTOR * imports;
572 IMAGE_SECTION_HEADER * section;
574 section = rva_to_section (import_dir.VirtualAddress, nt_header);
575 imports = RVA_TO_PTR (import_dir.VirtualAddress, section, executable);
577 for ( ; imports->Name; imports++)
579 char * dllname = RVA_TO_PTR (imports->Name, section, executable);
581 if (strcmp (dllname, "cygwin.dll") == 0)
583 *is_cygnus_app = TRUE;
592 close_file_data (&executable);
596 compare_env (const void *strp1, const void *strp2)
598 const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
600 while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
602 if ((*str1) > (*str2))
604 else if ((*str1) < (*str2))
609 if (*str1 == '=' && *str2 == '=')
611 else if (*str1 == '=')
618 merge_and_sort_env (char **envp1, char **envp2, char **new_envp)
634 qsort (new_envp, num, sizeof (char *), compare_env);
639 /* When a new child process is created we need to register it in our list,
640 so intercept spawn requests. */
642 sys_spawnve (int mode, CONST char *cmdname,
643 CONST char * CONST *argv, CONST char *CONST *envp)
645 Lisp_Object program, full;
646 char *cmdline, *env, *parg, **targ;
650 int is_dos_app, is_cygnus_app;
652 char escape_char = 0;
653 /* We pass our process ID to our children by setting up an environment
654 variable in their environment. */
655 char ppid_env_var_buffer[64];
656 char *extra_env[] = {ppid_env_var_buffer, NULL};
659 /* We don't care about the other modes */
660 if (mode != _P_NOWAIT)
666 /* Handle executable names without an executable suffix. */
667 program = make_string (cmdname, strlen (cmdname));
669 if (NILP (Ffile_executable_p (program)))
672 locate_file (Vexec_path, program, Vlisp_EXEC_SUFFIXES, &full, 1);
679 GET_C_STRING_FILENAME_DATA_ALLOCA (full, cmdname);
683 (char*)cmdname = alloca (strlen (argv[0]) + 1);
684 strcpy ((char*)cmdname, argv[0]);
688 /* make sure argv[0] and cmdname are both in DOS format */
689 unixtodos_filename ((char*)cmdname);
691 ((CONST char**)argv)[0] = cmdname;
693 /* Determine whether program is a 16-bit DOS executable, or a Win32
694 executable that is implicitly linked to the Cygnus dll (implying it
695 was compiled with the Cygnus GNU toolchain and hence relies on
696 cygwin.dll to parse the command line - we use this to decide how to
697 escape quote chars in command line args that must be quoted). */
698 win32_executable_type (cmdname, &is_dos_app, &is_cygnus_app);
700 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
701 application to start it by specifying the helper app as cmdname,
702 while leaving the real app name as argv[0]. */
705 cmdname = alloca (MAXPATHLEN);
706 if (egetenv ("CMDPROXY"))
707 strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
710 strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
711 strcat ((char*)cmdname, "cmdproxy.exe");
713 unixtodos_filename ((char*)cmdname);
716 /* we have to do some conjuring here to put argv and envp into the
717 form CreateProcess wants... argv needs to be a space separated/null
718 terminated list of parameters, and envp is a null
719 separated/double-null terminated list of parameters.
721 Additionally, zero-length args and args containing whitespace or
722 quote chars need to be wrapped in double quotes - for this to work,
723 embedded quotes need to be escaped as well. The aim is to ensure
724 the child process reconstructs the argv array we start with
725 exactly, so we treat quotes at the beginning and end of arguments
728 The Win32 GNU-based library from Cygnus doubles quotes to escape
729 them, while MSVC uses backslash for escaping. (Actually the MSVC
730 startup code does attempt to recognize doubled quotes and accept
731 them, but gets it wrong and ends up requiring three quotes to get a
732 single embedded quote!) So by default we decide whether to use
733 quote or backslash as the escape character based on whether the
734 binary is apparently a Cygnus compiled app.
736 Note that using backslash to escape embedded quotes requires
737 additional special handling if an embedded quote is already
738 preceded by backslash, or if an arg requiring quoting ends with
739 backslash. In such cases, the run of escape characters needs to be
740 doubled. For consistency, we apply this special handling as long
741 as the escape character is not quote.
743 Since we have no idea how large argv and envp are likely to be we
744 figure out list lengths on the fly and allocate them. */
746 if (!NILP (Vwin32_quote_process_args))
749 /* Override escape char by binding win32-quote-process-args to
750 desired character, or use t for auto-selection. */
751 if (INTP (Vwin32_quote_process_args))
752 escape_char = XINT (Vwin32_quote_process_args);
754 escape_char = is_cygnus_app ? '"' : '\\';
764 int escape_char_run = 0;
772 /* allow for embedded quotes to be escaped */
775 /* handle the case where the embedded quote is already escaped */
776 if (escape_char_run > 0)
778 /* To preserve the arg exactly, we need to double the
779 preceding escape characters (plus adding one to
780 escape the quote character itself). */
781 arglen += escape_char_run;
784 else if (*p == ' ' || *p == '\t')
789 if (*p == escape_char && escape_char != '"')
797 /* handle the case where the arg ends with an escape char - we
798 must not let the enclosing quote be escaped. */
799 if (escape_char_run > 0)
800 arglen += escape_char_run;
802 arglen += strlen (*targ++) + 1;
804 cmdline = alloca (arglen);
818 if (*p == ' ' || *p == '\t' || *p == '"')
823 int escape_char_run = 0;
829 last = p + strlen (p) - 1;
832 /* This version does not escape quotes if they occur at the
833 beginning or end of the arg - this could lead to incorrect
834 behavior when the arg itself represents a command line
835 containing quoted args. I believe this was originally done
836 as a hack to make some things work, before
837 `win32-quote-process-args' was added. */
840 if (*p == '"' && p > first && p < last)
841 *parg++ = escape_char; /* escape embedded quotes */
849 /* double preceding escape chars if any */
850 while (escape_char_run > 0)
852 *parg++ = escape_char;
855 /* escape all quote chars, even at beginning or end */
856 *parg++ = escape_char;
860 if (*p == escape_char && escape_char != '"')
865 /* double escape chars before enclosing quote */
866 while (escape_char_run > 0)
868 *parg++ = escape_char;
876 strcpy (parg, *targ);
877 parg += strlen (*targ);
887 numenv = 1; /* for end null */
890 arglen += strlen (*targ++) + 1;
893 /* extra env vars... */
894 sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
895 GetCurrentProcessId ());
896 arglen += strlen (ppid_env_var_buffer) + 1;
899 /* merge env passed in and extra env into one, and sort it. */
900 targ = (char **) alloca (numenv * sizeof (char *));
901 merge_and_sort_env ((char**)envp, extra_env, targ);
903 /* concatenate env entries. */
904 env = alloca (arglen);
908 strcpy (parg, *targ);
909 parg += strlen (*targ++);
922 /* Now create the process. */
923 if (!create_child (cmdname, cmdline, env, &pid, cp))
933 /* Substitute for certain kill () operations */
936 find_child_console (HWND hwnd, child_process * cp)
941 thread_id = GetWindowThreadProcessId (hwnd, &process_id);
942 if (process_id == cp->procinfo.dwProcessId)
944 char window_class[32];
946 GetClassName (hwnd, window_class, sizeof (window_class));
947 if (strcmp (window_class,
948 (os_subtype == OS_WIN95)
950 : "ConsoleWindowClass") == 0)
961 sys_kill (int pid, int sig)
965 int need_to_free = 0;
968 /* Only handle signals that will result in the process dying */
969 if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP)
975 cp = find_child_pid (pid);
978 proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid);
979 if (proc_hand == NULL)
988 proc_hand = cp->procinfo.hProcess;
989 pid = cp->procinfo.dwProcessId;
991 /* Try to locate console window for process. */
992 EnumWindows ((WNDENUMPROC)find_child_console, (LPARAM) cp);
997 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
999 BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
1000 BYTE vk_break_code = VK_CANCEL;
1001 BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
1002 HWND foreground_window;
1004 if (break_scan_code == 0)
1006 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
1007 vk_break_code = 'C';
1008 break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
1011 foreground_window = GetForegroundWindow ();
1012 if (foreground_window && SetForegroundWindow (cp->hwnd))
1014 /* Generate keystrokes as if user had typed Ctrl-Break or Ctrl-C. */
1015 keybd_event (VK_CONTROL, control_scan_code, 0, 0);
1016 keybd_event (vk_break_code, break_scan_code, 0, 0);
1017 keybd_event (vk_break_code, break_scan_code, KEYEVENTF_KEYUP, 0);
1018 keybd_event (VK_CONTROL, control_scan_code, KEYEVENTF_KEYUP, 0);
1020 /* Sleep for a bit to give time for Emacs frame to respond
1021 to focus change events (if Emacs was active app). */
1024 SetForegroundWindow (foreground_window);
1027 /* Ctrl-Break is NT equivalent of SIGINT. */
1028 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
1030 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
1031 "for pid %lu\n", GetLastError (), pid));
1038 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
1041 if (os_subtype == OS_WIN95)
1044 Another possibility is to try terminating the VDM out-right by
1045 calling the Shell VxD (id 0x17) V86 interface, function #4
1046 "SHELL_Destroy_VM", ie.
1052 First need to determine the current VM handle, and then arrange for
1053 the shellapi call to be made from the system vm (by using
1054 Switch_VM_and_callback).
1056 Could try to invoke DestroyVM through CallVxD.
1060 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
1061 to hang when cmdproxy is used in conjunction with
1062 command.com for an interactive shell. Posting
1063 WM_CLOSE pops up a dialog that, when Yes is selected,
1064 does the same thing. TerminateProcess is also less
1065 than ideal in that subprocesses tend to stick around
1066 until the machine is shutdown, but at least it
1067 doesn't freeze the 16-bit subsystem. */
1068 PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
1070 if (!TerminateProcess (proc_hand, 0xff))
1072 DebPrint (("sys_kill.TerminateProcess returned %d "
1073 "for pid %lu\n", GetLastError (), pid));
1080 PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
1082 /* Kill the process. On Win32 this doesn't kill child processes
1083 so it doesn't work very well for shells which is why it's not
1084 used in every case. */
1085 else if (!TerminateProcess (proc_hand, 0xff))
1087 DebPrint (("sys_kill.TerminateProcess returned %d "
1088 "for pid %lu\n", GetLastError (), pid));
1095 CloseHandle (proc_hand);
1101 /* Sync with FSF Emacs 19.34.6 note: ifdef'ed out in XEmacs */
1102 extern int report_file_error (CONST char *, Lisp_Object);
1104 /* The following two routines are used to manipulate stdin, stdout, and
1105 stderr of our child processes.
1107 Assuming that in, out, and err are *not* inheritable, we make them
1108 stdin, stdout, and stderr of the child as follows:
1110 - Save the parent's current standard handles.
1111 - Set the std handles to inheritable duplicates of the ones being passed in.
1112 (Note that _get_osfhandle() is an io.h procedure that retrieves the
1113 NT file handle for a crt file descriptor.)
1114 - Spawn the child, which inherits in, out, and err as stdin,
1115 stdout, and stderr. (see Spawnve)
1116 - Close the std handles passed to the child.
1117 - Reset the parent's standard handles to the saved handles.
1118 (see reset_standard_handles)
1119 We assume that the caller closes in, out, and err after calling us. */
1122 prepare_standard_handles (int in, int out, int err, HANDLE handles[3])
1125 HANDLE newstdin, newstdout, newstderr;
1127 parent = GetCurrentProcess ();
1129 handles[0] = GetStdHandle (STD_INPUT_HANDLE);
1130 handles[1] = GetStdHandle (STD_OUTPUT_HANDLE);
1131 handles[2] = GetStdHandle (STD_ERROR_HANDLE);
1133 /* make inheritable copies of the new handles */
1134 if (!DuplicateHandle (parent,
1135 (HANDLE) _get_osfhandle (in),
1140 DUPLICATE_SAME_ACCESS))
1141 report_file_error ("Duplicating input handle for child", Qnil);
1143 if (!DuplicateHandle (parent,
1144 (HANDLE) _get_osfhandle (out),
1149 DUPLICATE_SAME_ACCESS))
1150 report_file_error ("Duplicating output handle for child", Qnil);
1152 if (!DuplicateHandle (parent,
1153 (HANDLE) _get_osfhandle (err),
1158 DUPLICATE_SAME_ACCESS))
1159 report_file_error ("Duplicating error handle for child", Qnil);
1161 /* and store them as our std handles */
1162 if (!SetStdHandle (STD_INPUT_HANDLE, newstdin))
1163 report_file_error ("Changing stdin handle", Qnil);
1165 if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout))
1166 report_file_error ("Changing stdout handle", Qnil);
1168 if (!SetStdHandle (STD_ERROR_HANDLE, newstderr))
1169 report_file_error ("Changing stderr handle", Qnil);
1173 reset_standard_handles (int in, int out, int err, HANDLE handles[3])
1175 /* close the duplicated handles passed to the child */
1176 CloseHandle (GetStdHandle (STD_INPUT_HANDLE));
1177 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE));
1178 CloseHandle (GetStdHandle (STD_ERROR_HANDLE));
1180 /* now restore parent's saved std handles */
1181 SetStdHandle (STD_INPUT_HANDLE, handles[0]);
1182 SetStdHandle (STD_OUTPUT_HANDLE, handles[1]);
1183 SetStdHandle (STD_ERROR_HANDLE, handles[2]);
1187 set_process_dir (const char * dir)
1192 /* Some miscellaneous functions that are Windows specific, but not GUI
1193 specific (ie. are applicable in terminal or batch mode as well). */
1195 /* lifted from fileio.c */
1196 #define CORRECT_DIR_SEPS(s) \
1197 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
1198 else unixtodos_filename (s); \
1201 DEFUN ("win32-short-file-name", Fwin32_short_file_name, 1, 1, "", /*
1202 Return the short file name version (8.3) of the full path of FILENAME.
1203 If FILENAME does not exist, return nil.
1204 All path elements in FILENAME are converted to their short names.
1208 char shortname[MAX_PATH];
1210 CHECK_STRING (filename);
1212 /* first expand it. */
1213 filename = Fexpand_file_name (filename, Qnil);
1215 /* luckily, this returns the short version of each element in the path. */
1216 if (GetShortPathName (XSTRING_DATA (filename), shortname, MAX_PATH) == 0)
1219 CORRECT_DIR_SEPS (shortname);
1221 return build_string (shortname);
1225 DEFUN ("win32-long-file-name", Fwin32_long_file_name, 1, 1, "", /*
1226 Return the long file name version of the full path of FILENAME.
1227 If FILENAME does not exist, return nil.
1228 All path elements in FILENAME are converted to their long names.
1232 char longname[ MAX_PATH ];
1234 CHECK_STRING (filename);
1236 /* first expand it. */
1237 filename = Fexpand_file_name (filename, Qnil);
1239 if (!win32_get_long_filename (XSTRING_DATA (filename), longname, MAX_PATH))
1242 CORRECT_DIR_SEPS (longname);
1244 return build_string (longname);
1247 DEFUN ("win32-set-process-priority", Fwin32_set_process_priority, 2, 2, "", /*
1248 Set the priority of PROCESS to PRIORITY.
1249 If PROCESS is nil, the priority of Emacs is changed, otherwise the
1250 priority of the process whose pid is PROCESS is changed.
1251 PRIORITY should be one of the symbols high, normal, or low;
1252 any other symbol will be interpreted as normal.
1254 If successful, the return value is t, otherwise nil.
1256 (process, priority))
1258 HANDLE proc_handle = GetCurrentProcess ();
1259 DWORD priority_class = NORMAL_PRIORITY_CLASS;
1260 Lisp_Object result = Qnil;
1262 CHECK_SYMBOL (priority);
1264 if (!NILP (process))
1269 CHECK_INT (process);
1271 /* Allow pid to be an internally generated one, or one obtained
1272 externally. This is necessary because real pids on Win95 are
1275 pid = XINT (process);
1276 cp = find_child_pid (pid);
1278 pid = cp->procinfo.dwProcessId;
1280 proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid);
1283 if (EQ (priority, Qhigh))
1284 priority_class = HIGH_PRIORITY_CLASS;
1285 else if (EQ (priority, Qlow))
1286 priority_class = IDLE_PRIORITY_CLASS;
1288 if (proc_handle != NULL)
1290 if (SetPriorityClass (proc_handle, priority_class))
1292 if (!NILP (process))
1293 CloseHandle (proc_handle);
1300 DEFUN ("win32-get-locale-info", Fwin32_get_locale_info, 1, 2, "", /*
1301 "Return information about the Windows locale LCID.
1302 By default, return a three letter locale code which encodes the default
1303 language as the first two characters, and the country or regional variant
1304 as the third letter. For example, ENU refers to `English (United States)',
1305 while ENC means `English (Canadian)'.
1307 If the optional argument LONGFORM is non-nil, the long form of the locale
1308 name is returned, e.g. `English (United States)' instead.
1310 If LCID (a 16-bit number) is not a valid locale, the result is nil.
1316 char abbrev_name[32] = { 0 };
1317 char full_name[256] = { 0 };
1321 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1324 if (NILP (longform))
1326 got_abbrev = GetLocaleInfo (XINT (lcid),
1327 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
1328 abbrev_name, sizeof (abbrev_name));
1330 return build_string (abbrev_name);
1334 got_full = GetLocaleInfo (XINT (lcid),
1335 LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP,
1336 full_name, sizeof (full_name));
1338 return build_string (full_name);
1345 DEFUN ("win32-get-current-locale-id", Fwin32_get_current_locale_id, 0, 0, "", /*
1346 "Return Windows locale id for current locale setting.
1347 This is a numerical value; use `win32-get-locale-info' to convert to a
1348 human-readable form.
1352 return make_int (GetThreadLocale ());
1356 DEFUN ("win32-get-default-locale-id", Fwin32_get_default_locale_id, 0, 1, "", /*
1357 "Return Windows locale id for default locale setting.
1358 By default, the system default locale setting is returned; if the optional
1359 parameter USERP is non-nil, the user default locale setting is returned.
1360 This is a numerical value; use `win32-get-locale-info' to convert to a
1361 human-readable form.
1366 return make_int (GetSystemDefaultLCID ());
1367 return make_int (GetUserDefaultLCID ());
1370 DWORD int_from_hex (char * s)
1373 static char hex[] = "0123456789abcdefABCDEF";
1376 while (*s && (p = strchr(hex, *s)) != NULL)
1378 unsigned digit = p - hex;
1381 val = val * 16 + digit;
1387 /* We need to build a global list, since the EnumSystemLocale callback
1388 function isn't given a context pointer. */
1389 Lisp_Object Vwin32_valid_locale_ids;
1391 BOOL CALLBACK enum_locale_fn (LPTSTR localeNum)
1393 DWORD id = int_from_hex (localeNum);
1394 Vwin32_valid_locale_ids = Fcons (make_int (id), Vwin32_valid_locale_ids);
1398 DEFUN ("win32-get-valid-locale-ids", Fwin32_get_valid_locale_ids, 0, 0, "", /*
1399 Return list of all valid Windows locale ids.
1400 Each id is a numerical value; use `win32-get-locale-info' to convert to a
1401 human-readable form.
1405 Vwin32_valid_locale_ids = Qnil;
1407 EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED);
1409 Vwin32_valid_locale_ids = Fnreverse (Vwin32_valid_locale_ids);
1410 return Vwin32_valid_locale_ids;
1414 DEFUN ("win32-set-current-locale", Fwin32_set_current_locale, 1, 1, "", /*
1415 Make Windows locale LCID be the current locale setting for Emacs.
1416 If successful, the new locale id is returned, otherwise nil.
1422 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1425 if (!SetThreadLocale (XINT (lcid)))
1428 /* Sync with FSF Emacs 19.34.6 note: dwWinThreadId declared in
1429 w32term.h and defined in w32fns.c, both of which are not in current
1430 XEmacs. ### Check what we lose by ifdef'ing out these. --marcpa */
1432 /* Need to set input thread locale if present. */
1434 /* Reply is not needed. */
1435 PostThreadMessage (dwWinThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0);
1438 return make_int (GetThreadLocale ());
1445 Qhigh = intern ("high");
1446 Qlow = intern ("low");
1448 DEFSUBR (Fwin32_short_file_name);
1449 DEFSUBR (Fwin32_long_file_name);
1450 DEFSUBR (Fwin32_set_process_priority);
1451 DEFSUBR (Fwin32_get_locale_info);
1452 DEFSUBR (Fwin32_get_current_locale_id);
1453 DEFSUBR (Fwin32_get_default_locale_id);
1454 DEFSUBR (Fwin32_get_valid_locale_ids);
1455 DEFSUBR (Fwin32_set_current_locale);
1457 DEFVAR_LISP ("win32-quote-process-args", &Vwin32_quote_process_args /*
1458 Non-nil enables quoting of process arguments to ensure correct parsing.
1459 Because Windows does not directly pass argv arrays to child processes,
1460 programs have to reconstruct the argv array by parsing the command
1461 line string. For an argument to contain a space, it must be enclosed
1462 in double quotes or it will be parsed as multiple arguments.
1464 If the value is a character, that character will be used to escape any
1465 quote characters that appear, otherwise a suitable escape character
1466 will be chosen based on the type of the program.
1468 Vwin32_quote_process_args = Qt;
1470 DEFVAR_LISP ("win32-start-process-show-window",
1471 &Vwin32_start_process_show_window /*
1472 When nil, processes started via start-process hide their windows.
1473 When non-nil, they show their window in the method of their choice.
1475 Vwin32_start_process_show_window = Qnil;
1477 DEFVAR_LISP ("win32-start-process-share-console",
1478 &Vwin32_start_process_share_console /*
1479 When nil, processes started via start-process are given a new console.
1480 When non-nil, they share the Emacs console; this has the limitation of
1481 allowing only only DOS subprocess to run at a time (whether started directly
1482 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
1483 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
1484 otherwise respond to interrupts from Emacs.
1486 Vwin32_start_process_share_console = Qnil;
1488 DEFVAR_LISP ("win32-pipe-read-delay", &Vwin32_pipe_read_delay /*
1489 Forced delay before reading subprocess output.
1490 This is done to improve the buffering of subprocess output, by
1491 avoiding the inefficiency of frequently reading small amounts of data.
1493 If positive, the value is the number of milliseconds to sleep before
1494 reading the subprocess output. If negative, the magnitude is the number
1495 of time slices to wait (effectively boosting the priority of the child
1496 process temporarily). A value of zero disables waiting entirely.
1498 Vwin32_pipe_read_delay = make_int (50);
1501 DEFVAR_LISP ("win32-generate-fake-inodes", &Vwin32_generate_fake_inodes /*
1502 "Non-nil means attempt to fake realistic inode values.
1503 This works by hashing the truename of files, and should detect
1504 aliasing between long and short (8.3 DOS) names, but can have
1505 false positives because of hash collisions. Note that determining
1506 the truename of a file can be slow.
1508 Vwin32_generate_fake_inodes = Qnil;
1511 /* end of ntproc.c */