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 /* Return pointer to section header for section containing the given
463 relative virtual address. */
464 static IMAGE_SECTION_HEADER *
465 rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header)
467 PIMAGE_SECTION_HEADER section;
470 section = IMAGE_FIRST_SECTION (nt_header);
472 for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
474 if (rva >= section->VirtualAddress
475 && rva < section->VirtualAddress + section->SizeOfRawData)
484 win32_executable_type (const char * filename, int * is_dos_app, int * is_cygnus_app)
486 file_data executable;
489 /* Default values in case we can't tell for sure. */
491 *is_cygnus_app = FALSE;
493 if (!open_input_file (&executable, filename))
496 p = strrchr (filename, '.');
498 /* We can only identify DOS .com programs from the extension. */
499 if (p && stricmp (p, ".com") == 0)
501 else if (p && (stricmp (p, ".bat") == 0 ||
502 stricmp (p, ".cmd") == 0))
504 /* A DOS shell script - it appears that CreateProcess is happy to
505 accept this (somewhat surprisingly); presumably it looks at
506 COMSPEC to determine what executable to actually invoke.
507 Therefore, we have to do the same here as well. */
508 /* Actually, I think it uses the program association for that
509 extension, which is defined in the registry. */
510 p = egetenv ("COMSPEC");
512 win32_executable_type (p, is_dos_app, is_cygnus_app);
516 /* Look for DOS .exe signature - if found, we must also check that
517 it isn't really a 16- or 32-bit Windows exe, since both formats
518 start with a DOS program stub. Note that 16-bit Windows
519 executables use the OS/2 1.x format. */
522 /* mingw32 doesn't have enough headers to detect cygwin
523 apps, just do what we can. */
526 exe_header = (FILHDR*) executable.file_base;
527 if (exe_header->e_magic != DOSMAGIC)
530 if ((char*) exe_header->e_lfanew > (char*) executable.size)
532 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
535 else if (exe_header->nt_signature != NT_SIGNATURE)
540 IMAGE_DOS_HEADER * dos_header;
541 IMAGE_NT_HEADERS * nt_header;
543 dos_header = (PIMAGE_DOS_HEADER) executable.file_base;
544 if (dos_header->e_magic != IMAGE_DOS_SIGNATURE)
547 nt_header = (PIMAGE_NT_HEADERS) ((char*) dos_header + dos_header->e_lfanew);
549 if ((char*) nt_header > (char*) dos_header + executable.size)
551 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
554 else if (nt_header->Signature != IMAGE_NT_SIGNATURE &&
555 LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE)
559 else if (nt_header->Signature == IMAGE_NT_SIGNATURE)
561 /* Look for cygwin.dll in DLL import list. */
562 IMAGE_DATA_DIRECTORY import_dir =
563 nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
564 IMAGE_IMPORT_DESCRIPTOR * imports;
565 IMAGE_SECTION_HEADER * section;
567 section = rva_to_section (import_dir.VirtualAddress, nt_header);
568 imports = (IMAGE_IMPORT_DESCRIPTOR *) RVA_TO_PTR (import_dir.VirtualAddress,
569 section, executable);
571 for ( ; imports->Name; imports++)
573 char *dllname = (char*) RVA_TO_PTR (imports->Name, section, executable);
575 if (strcmp (dllname, "cygwin.dll") == 0)
577 *is_cygnus_app = TRUE;
586 close_file_data (&executable);
590 compare_env (const void *strp1, const void *strp2)
592 const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
594 while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
596 if ((*str1) > (*str2))
598 else if ((*str1) < (*str2))
603 if (*str1 == '=' && *str2 == '=')
605 else if (*str1 == '=')
612 merge_and_sort_env (char **envp1, char **envp2, char **new_envp)
628 qsort (new_envp, num, sizeof (char*), compare_env);
633 /* When a new child process is created we need to register it in our list,
634 so intercept spawn requests. */
636 sys_spawnve (int mode, const char *cmdname,
637 const char * const *argv, const char *const *envp)
639 Lisp_Object program, full;
640 char *cmdline, *env, *parg, **targ;
644 int is_dos_app, is_cygnus_app;
646 char escape_char = 0;
647 /* We pass our process ID to our children by setting up an environment
648 variable in their environment. */
649 char ppid_env_var_buffer[64];
650 char *extra_env[] = {ppid_env_var_buffer, NULL};
653 /* We don't care about the other modes */
654 if (mode != _P_NOWAIT)
660 /* Handle executable names without an executable suffix. */
661 program = make_string (cmdname, strlen (cmdname));
663 if (NILP (Ffile_executable_p (program)))
666 locate_file (Vexec_path, program, Vlisp_EXEC_SUFFIXES, &full, 1);
673 TO_EXTERNAL_FORMAT (LISP_STRING, full,
674 C_STRING_ALLOCA, cmdname,
679 cmdname = (char*)alloca (strlen (argv[0]) + 1);
680 strcpy ((char*)cmdname, argv[0]);
684 /* make sure argv[0] and cmdname are both in DOS format */
685 unixtodos_filename ((char*)cmdname);
687 ((const char**)argv)[0] = cmdname;
689 /* Determine whether program is a 16-bit DOS executable, or a Win32
690 executable that is implicitly linked to the Cygnus dll (implying it
691 was compiled with the Cygnus GNU toolchain and hence relies on
692 cygwin.dll to parse the command line - we use this to decide how to
693 escape quote chars in command line args that must be quoted). */
694 win32_executable_type (cmdname, &is_dos_app, &is_cygnus_app);
696 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
697 application to start it by specifying the helper app as cmdname,
698 while leaving the real app name as argv[0]. */
701 cmdname = (char*) alloca (MAXPATHLEN);
702 if (egetenv ("CMDPROXY"))
703 strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
706 strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
707 strcat ((char*)cmdname, "cmdproxy.exe");
709 unixtodos_filename ((char*)cmdname);
712 /* we have to do some conjuring here to put argv and envp into the
713 form CreateProcess wants... argv needs to be a space separated/null
714 terminated list of parameters, and envp is a null
715 separated/double-null terminated list of parameters.
717 Additionally, zero-length args and args containing whitespace or
718 quote chars need to be wrapped in double quotes - for this to work,
719 embedded quotes need to be escaped as well. The aim is to ensure
720 the child process reconstructs the argv array we start with
721 exactly, so we treat quotes at the beginning and end of arguments
724 The Win32 GNU-based library from Cygnus doubles quotes to escape
725 them, while MSVC uses backslash for escaping. (Actually the MSVC
726 startup code does attempt to recognize doubled quotes and accept
727 them, but gets it wrong and ends up requiring three quotes to get a
728 single embedded quote!) So by default we decide whether to use
729 quote or backslash as the escape character based on whether the
730 binary is apparently a Cygnus compiled app.
732 Note that using backslash to escape embedded quotes requires
733 additional special handling if an embedded quote is already
734 preceded by backslash, or if an arg requiring quoting ends with
735 backslash. In such cases, the run of escape characters needs to be
736 doubled. For consistency, we apply this special handling as long
737 as the escape character is not quote.
739 Since we have no idea how large argv and envp are likely to be we
740 figure out list lengths on the fly and allocate them. */
742 if (!NILP (Vwin32_quote_process_args))
745 /* Override escape char by binding win32-quote-process-args to
746 desired character, or use t for auto-selection. */
747 if (INTP (Vwin32_quote_process_args))
748 escape_char = (char) XINT (Vwin32_quote_process_args);
750 escape_char = is_cygnus_app ? '"' : '\\';
760 int escape_char_run = 0;
768 /* allow for embedded quotes to be escaped */
771 /* handle the case where the embedded quote is already escaped */
772 if (escape_char_run > 0)
774 /* To preserve the arg exactly, we need to double the
775 preceding escape characters (plus adding one to
776 escape the quote character itself). */
777 arglen += escape_char_run;
780 else if (*p == ' ' || *p == '\t')
785 if (*p == escape_char && escape_char != '"')
793 /* handle the case where the arg ends with an escape char - we
794 must not let the enclosing quote be escaped. */
795 if (escape_char_run > 0)
796 arglen += escape_char_run;
798 arglen += strlen (*targ++) + 1;
800 cmdline = (char*) alloca (arglen);
814 if (*p == ' ' || *p == '\t' || *p == '"')
819 int escape_char_run = 0;
825 last = p + strlen (p) - 1;
828 /* This version does not escape quotes if they occur at the
829 beginning or end of the arg - this could lead to incorrect
830 behavior when the arg itself represents a command line
831 containing quoted args. I believe this was originally done
832 as a hack to make some things work, before
833 `win32-quote-process-args' was added. */
836 if (*p == '"' && p > first && p < last)
837 *parg++ = escape_char; /* escape embedded quotes */
845 /* double preceding escape chars if any */
846 while (escape_char_run > 0)
848 *parg++ = escape_char;
851 /* escape all quote chars, even at beginning or end */
852 *parg++ = escape_char;
856 if (*p == escape_char && escape_char != '"')
861 /* double escape chars before enclosing quote */
862 while (escape_char_run > 0)
864 *parg++ = escape_char;
872 strcpy (parg, *targ);
873 parg += strlen (*targ);
882 targ = (char**) envp;
883 numenv = 1; /* for end null */
886 arglen += strlen (*targ++) + 1;
889 /* extra env vars... */
890 sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
891 GetCurrentProcessId ());
892 arglen += strlen (ppid_env_var_buffer) + 1;
895 /* merge env passed in and extra env into one, and sort it. */
896 targ = (char **) alloca (numenv * sizeof (char*));
897 merge_and_sort_env ((char**) envp, extra_env, targ);
899 /* concatenate env entries. */
900 env = (char*) alloca (arglen);
904 strcpy (parg, *targ);
905 parg += strlen (*targ++);
918 /* Now create the process. */
919 if (!create_child (cmdname, cmdline, env, &pid, cp))
929 /* Substitute for certain kill () operations */
932 find_child_console (HWND hwnd, child_process * cp)
937 thread_id = GetWindowThreadProcessId (hwnd, &process_id);
938 if (process_id == cp->procinfo.dwProcessId)
940 char window_class[32];
942 GetClassName (hwnd, window_class, sizeof (window_class));
943 if (strcmp (window_class,
946 : "ConsoleWindowClass") == 0)
957 sys_kill (int pid, int sig)
961 int need_to_free = 0;
964 /* Only handle signals that will result in the process dying */
965 if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP)
971 cp = find_child_pid (pid);
974 proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid);
975 if (proc_hand == NULL)
984 proc_hand = cp->procinfo.hProcess;
985 pid = cp->procinfo.dwProcessId;
987 /* Try to locate console window for process. */
988 EnumWindows ((WNDENUMPROC)find_child_console, (LPARAM) cp);
993 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
995 BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
996 BYTE vk_break_code = VK_CANCEL;
997 BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
998 HWND foreground_window;
1000 if (break_scan_code == 0)
1002 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
1003 vk_break_code = 'C';
1004 break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
1007 foreground_window = GetForegroundWindow ();
1008 if (foreground_window && SetForegroundWindow (cp->hwnd))
1010 /* Generate keystrokes as if user had typed Ctrl-Break or Ctrl-C. */
1011 keybd_event (VK_CONTROL, control_scan_code, 0, 0);
1012 keybd_event (vk_break_code, break_scan_code, 0, 0);
1013 keybd_event (vk_break_code, break_scan_code, KEYEVENTF_KEYUP, 0);
1014 keybd_event (VK_CONTROL, control_scan_code, KEYEVENTF_KEYUP, 0);
1016 /* Sleep for a bit to give time for Emacs frame to respond
1017 to focus change events (if Emacs was active app). */
1020 SetForegroundWindow (foreground_window);
1023 /* Ctrl-Break is NT equivalent of SIGINT. */
1024 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
1026 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
1027 "for pid %lu\n", GetLastError (), pid));
1034 if (NILP (Vwin32_start_process_share_console) && cp && cp->hwnd)
1037 if (msw_windows9x_p())
1040 Another possibility is to try terminating the VDM out-right by
1041 calling the Shell VxD (id 0x17) V86 interface, function #4
1042 "SHELL_Destroy_VM", ie.
1048 First need to determine the current VM handle, and then arrange for
1049 the shellapi call to be made from the system vm (by using
1050 Switch_VM_and_callback).
1052 Could try to invoke DestroyVM through CallVxD.
1056 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
1057 to hang when cmdproxy is used in conjunction with
1058 command.com for an interactive shell. Posting
1059 WM_CLOSE pops up a dialog that, when Yes is selected,
1060 does the same thing. TerminateProcess is also less
1061 than ideal in that subprocesses tend to stick around
1062 until the machine is shutdown, but at least it
1063 doesn't freeze the 16-bit subsystem. */
1064 PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
1066 if (!TerminateProcess (proc_hand, 0xff))
1068 DebPrint (("sys_kill.TerminateProcess returned %d "
1069 "for pid %lu\n", GetLastError (), pid));
1076 PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
1078 /* Kill the process. On Win32 this doesn't kill child processes
1079 so it doesn't work very well for shells which is why it's not
1080 used in every case. */
1081 else if (!TerminateProcess (proc_hand, 0xff))
1083 DebPrint (("sys_kill.TerminateProcess returned %d "
1084 "for pid %lu\n", GetLastError (), pid));
1091 CloseHandle (proc_hand);
1097 /* Sync with FSF Emacs 19.34.6 note: ifdef'ed out in XEmacs */
1098 extern int report_file_error (const char *, Lisp_Object);
1100 /* The following two routines are used to manipulate stdin, stdout, and
1101 stderr of our child processes.
1103 Assuming that in, out, and err are *not* inheritable, we make them
1104 stdin, stdout, and stderr of the child as follows:
1106 - Save the parent's current standard handles.
1107 - Set the std handles to inheritable duplicates of the ones being passed in.
1108 (Note that _get_osfhandle() is an io.h procedure that retrieves the
1109 NT file handle for a crt file descriptor.)
1110 - Spawn the child, which inherits in, out, and err as stdin,
1111 stdout, and stderr. (see Spawnve)
1112 - Close the std handles passed to the child.
1113 - Reset the parent's standard handles to the saved handles.
1114 (see reset_standard_handles)
1115 We assume that the caller closes in, out, and err after calling us. */
1118 prepare_standard_handles (int in, int out, int err, HANDLE handles[3])
1121 HANDLE newstdin, newstdout, newstderr;
1123 parent = GetCurrentProcess ();
1125 handles[0] = GetStdHandle (STD_INPUT_HANDLE);
1126 handles[1] = GetStdHandle (STD_OUTPUT_HANDLE);
1127 handles[2] = GetStdHandle (STD_ERROR_HANDLE);
1129 /* make inheritable copies of the new handles */
1130 if (!DuplicateHandle (parent,
1131 (HANDLE) _get_osfhandle (in),
1136 DUPLICATE_SAME_ACCESS))
1137 report_file_error ("Duplicating input handle for child", Qnil);
1139 if (!DuplicateHandle (parent,
1140 (HANDLE) _get_osfhandle (out),
1145 DUPLICATE_SAME_ACCESS))
1146 report_file_error ("Duplicating output handle for child", Qnil);
1148 if (!DuplicateHandle (parent,
1149 (HANDLE) _get_osfhandle (err),
1154 DUPLICATE_SAME_ACCESS))
1155 report_file_error ("Duplicating error handle for child", Qnil);
1157 /* and store them as our std handles */
1158 if (!SetStdHandle (STD_INPUT_HANDLE, newstdin))
1159 report_file_error ("Changing stdin handle", Qnil);
1161 if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout))
1162 report_file_error ("Changing stdout handle", Qnil);
1164 if (!SetStdHandle (STD_ERROR_HANDLE, newstderr))
1165 report_file_error ("Changing stderr handle", Qnil);
1169 reset_standard_handles (int in, int out, int err, HANDLE handles[3])
1171 /* close the duplicated handles passed to the child */
1172 CloseHandle (GetStdHandle (STD_INPUT_HANDLE));
1173 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE));
1174 CloseHandle (GetStdHandle (STD_ERROR_HANDLE));
1176 /* now restore parent's saved std handles */
1177 SetStdHandle (STD_INPUT_HANDLE, handles[0]);
1178 SetStdHandle (STD_OUTPUT_HANDLE, handles[1]);
1179 SetStdHandle (STD_ERROR_HANDLE, handles[2]);
1183 set_process_dir (const char * dir)
1188 /* Some miscellaneous functions that are Windows specific, but not GUI
1189 specific (ie. are applicable in terminal or batch mode as well). */
1191 /* lifted from fileio.c */
1192 #define CORRECT_DIR_SEPS(s) \
1193 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
1194 else unixtodos_filename (s); \
1197 DEFUN ("win32-short-file-name", Fwin32_short_file_name, 1, 1, "", /*
1198 Return the short file name version (8.3) of the full path of FILENAME.
1199 If FILENAME does not exist, return nil.
1200 All path elements in FILENAME are converted to their short names.
1204 char shortname[MAX_PATH];
1206 CHECK_STRING (filename);
1208 /* first expand it. */
1209 filename = Fexpand_file_name (filename, Qnil);
1211 /* luckily, this returns the short version of each element in the path. */
1212 if (GetShortPathName (XSTRING_DATA (filename), shortname, MAX_PATH) == 0)
1215 CORRECT_DIR_SEPS (shortname);
1217 return build_string (shortname);
1221 DEFUN ("win32-long-file-name", Fwin32_long_file_name, 1, 1, "", /*
1222 Return the long file name version of the full path of FILENAME.
1223 If FILENAME does not exist, return nil.
1224 All path elements in FILENAME are converted to their long names.
1228 char longname[ MAX_PATH ];
1230 CHECK_STRING (filename);
1232 /* first expand it. */
1233 filename = Fexpand_file_name (filename, Qnil);
1235 if (!win32_get_long_filename (XSTRING_DATA (filename), longname, MAX_PATH))
1238 CORRECT_DIR_SEPS (longname);
1240 return build_string (longname);
1243 DEFUN ("win32-set-process-priority", Fwin32_set_process_priority, 2, 2, "", /*
1244 Set the priority of PROCESS to PRIORITY.
1245 If PROCESS is nil, the priority of Emacs is changed, otherwise the
1246 priority of the process whose pid is PROCESS is changed.
1247 PRIORITY should be one of the symbols high, normal, or low;
1248 any other symbol will be interpreted as normal.
1250 If successful, the return value is t, otherwise nil.
1252 (process, priority))
1254 HANDLE proc_handle = GetCurrentProcess ();
1255 DWORD priority_class = NORMAL_PRIORITY_CLASS;
1256 Lisp_Object result = Qnil;
1258 CHECK_SYMBOL (priority);
1260 if (!NILP (process))
1265 CHECK_INT (process);
1267 /* Allow pid to be an internally generated one, or one obtained
1268 externally. This is necessary because real pids on Win95 are
1271 pid = XINT (process);
1272 cp = find_child_pid (pid);
1274 pid = cp->procinfo.dwProcessId;
1276 proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid);
1279 if (EQ (priority, Qhigh))
1280 priority_class = HIGH_PRIORITY_CLASS;
1281 else if (EQ (priority, Qlow))
1282 priority_class = IDLE_PRIORITY_CLASS;
1284 if (proc_handle != NULL)
1286 if (SetPriorityClass (proc_handle, priority_class))
1288 if (!NILP (process))
1289 CloseHandle (proc_handle);
1296 DEFUN ("win32-get-locale-info", Fwin32_get_locale_info, 1, 2, "", /*
1297 "Return information about the Windows locale LCID.
1298 By default, return a three letter locale code which encodes the default
1299 language as the first two characters, and the country or regional variant
1300 as the third letter. For example, ENU refers to `English (United States)',
1301 while ENC means `English (Canadian)'.
1303 If the optional argument LONGFORM is non-nil, the long form of the locale
1304 name is returned, e.g. `English (United States)' instead.
1306 If LCID (a 16-bit number) is not a valid locale, the result is nil.
1312 char abbrev_name[32] = { 0 };
1313 char full_name[256] = { 0 };
1317 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1320 if (NILP (longform))
1322 got_abbrev = GetLocaleInfo (XINT (lcid),
1323 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
1324 abbrev_name, sizeof (abbrev_name));
1326 return build_string (abbrev_name);
1330 got_full = GetLocaleInfo (XINT (lcid),
1331 LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP,
1332 full_name, sizeof (full_name));
1334 return build_string (full_name);
1341 DEFUN ("win32-get-current-locale-id", Fwin32_get_current_locale_id, 0, 0, "", /*
1342 "Return Windows locale id for current locale setting.
1343 This is a numerical value; use `win32-get-locale-info' to convert to a
1344 human-readable form.
1348 return make_int (GetThreadLocale ());
1352 DEFUN ("win32-get-default-locale-id", Fwin32_get_default_locale_id, 0, 1, "", /*
1353 "Return Windows locale id for default locale setting.
1354 By default, the system default locale setting is returned; if the optional
1355 parameter USERP is non-nil, the user default locale setting is returned.
1356 This is a numerical value; use `win32-get-locale-info' to convert to a
1357 human-readable form.
1362 return make_int (GetSystemDefaultLCID ());
1363 return make_int (GetUserDefaultLCID ());
1366 DWORD int_from_hex (char * s)
1369 static char hex[] = "0123456789abcdefABCDEF";
1372 while (*s && (p = strchr(hex, *s)) != NULL)
1374 unsigned digit = p - hex;
1377 val = val * 16 + digit;
1383 /* We need to build a global list, since the EnumSystemLocale callback
1384 function isn't given a context pointer. */
1385 Lisp_Object Vwin32_valid_locale_ids;
1387 BOOL CALLBACK enum_locale_fn (LPTSTR localeNum)
1389 DWORD id = int_from_hex (localeNum);
1390 Vwin32_valid_locale_ids = Fcons (make_int (id), Vwin32_valid_locale_ids);
1394 DEFUN ("win32-get-valid-locale-ids", Fwin32_get_valid_locale_ids, 0, 0, "", /*
1395 Return list of all valid Windows locale ids.
1396 Each id is a numerical value; use `win32-get-locale-info' to convert to a
1397 human-readable form.
1401 Vwin32_valid_locale_ids = Qnil;
1403 EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED);
1405 Vwin32_valid_locale_ids = Fnreverse (Vwin32_valid_locale_ids);
1406 return Vwin32_valid_locale_ids;
1410 DEFUN ("win32-set-current-locale", Fwin32_set_current_locale, 1, 1, "", /*
1411 Make Windows locale LCID be the current locale setting for Emacs.
1412 If successful, the new locale id is returned, otherwise nil.
1418 if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
1421 if (!SetThreadLocale (XINT (lcid)))
1424 /* Sync with FSF Emacs 19.34.6 note: dwWinThreadId declared in
1425 w32term.h and defined in w32fns.c, both of which are not in current
1426 XEmacs. #### Check what we lose by ifdef'ing out these. --marcpa */
1428 /* Need to set input thread locale if present. */
1430 /* Reply is not needed. */
1431 PostThreadMessage (dwWinThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0);
1434 return make_int (GetThreadLocale ());
1439 syms_of_ntproc (void)
1441 DEFSUBR (Fwin32_short_file_name);
1442 DEFSUBR (Fwin32_long_file_name);
1443 DEFSUBR (Fwin32_set_process_priority);
1444 DEFSUBR (Fwin32_get_locale_info);
1445 DEFSUBR (Fwin32_get_current_locale_id);
1446 DEFSUBR (Fwin32_get_default_locale_id);
1447 DEFSUBR (Fwin32_get_valid_locale_ids);
1448 DEFSUBR (Fwin32_set_current_locale);
1453 vars_of_ntproc (void)
1455 defsymbol (&Qhigh, "high");
1456 defsymbol (&Qlow, "low");
1458 DEFVAR_LISP ("win32-quote-process-args", &Vwin32_quote_process_args /*
1459 Non-nil enables quoting of process arguments to ensure correct parsing.
1460 Because Windows does not directly pass argv arrays to child processes,
1461 programs have to reconstruct the argv array by parsing the command
1462 line string. For an argument to contain a space, it must be enclosed
1463 in double quotes or it will be parsed as multiple arguments.
1465 If the value is a character, that character will be used to escape any
1466 quote characters that appear, otherwise a suitable escape character
1467 will be chosen based on the type of the program.
1469 Vwin32_quote_process_args = Qt;
1471 DEFVAR_LISP ("win32-start-process-show-window",
1472 &Vwin32_start_process_show_window /*
1473 When nil, processes started via start-process hide their windows.
1474 When non-nil, they show their window in the method of their choice.
1476 Vwin32_start_process_show_window = Qnil;
1478 DEFVAR_LISP ("win32-start-process-share-console",
1479 &Vwin32_start_process_share_console /*
1480 When nil, processes started via start-process are given a new console.
1481 When non-nil, they share the Emacs console; this has the limitation of
1482 allowing only only DOS subprocess to run at a time (whether started directly
1483 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
1484 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
1485 otherwise respond to interrupts from Emacs.
1487 Vwin32_start_process_share_console = Qt;
1489 DEFVAR_LISP ("win32-pipe-read-delay", &Vwin32_pipe_read_delay /*
1490 Forced delay before reading subprocess output.
1491 This is done to improve the buffering of subprocess output, by
1492 avoiding the inefficiency of frequently reading small amounts of data.
1494 If positive, the value is the number of milliseconds to sleep before
1495 reading the subprocess output. If negative, the magnitude is the number
1496 of time slices to wait (effectively boosting the priority of the child
1497 process temporarily). A value of zero disables waiting entirely.
1499 Vwin32_pipe_read_delay = make_int (50);
1502 DEFVAR_LISP ("win32-generate-fake-inodes", &Vwin32_generate_fake_inodes /*
1503 "Non-nil means attempt to fake realistic inode values.
1504 This works by hashing the truename of files, and should detect
1505 aliasing between long and short (8.3 DOS) names, but can have
1506 false positives because of hash collisions. Note that determining
1507 the truename of a file can be slow.
1509 Vwin32_generate_fake_inodes = Qnil;
1513 /* end of ntproc.c */