1 /* Asynchronous subprocess implementation for Win32
2 Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
3 Free Software Foundation, Inc.
4 Copyright (C) 1995 Sun Microsystems, Inc.
5 Copyright (C) 1995, 1996, 2000 Ben Wing.
7 This file is part of XEmacs.
9 XEmacs is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with XEmacs; see the file COPYING. If not, write to
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* Written by Kirill M. Katsnelson <kkm@kis.ru>, April 1998 */
30 #include "console-msw.h"
45 /* Bound by win32-native.el */
46 Lisp_Object Qmswindows_construct_process_command_line;
48 /* Arbitrary size limit for code fragments passed to run_in_other_process */
49 #define FRAGMENT_CODE_SIZE 32
51 /* Implementation-specific data. Pointed to by Lisp_Process->process_data */
52 struct nt_process_data
56 HWND hwnd; /* console window */
59 /* Control whether create_child causes the process to inherit Emacs'
60 console window, or be given a new one of its own. The default is
61 nil, to allow multiple DOS programs to run on Win95. Having separate
62 consoles also allows Emacs to cleanly terminate process groups. */
63 Lisp_Object Vmswindows_start_process_share_console;
65 /* Control whether create_child cause the process to inherit Emacs'
66 error mode setting. The default is t, to minimize the possibility of
67 subprocesses blocking when accessing unmounted drives. */
68 Lisp_Object Vmswindows_start_process_inherit_error_mode;
70 #define NT_DATA(p) ((struct nt_process_data*)((p)->process_data))
72 /*-----------------------------------------------------------------------*/
74 /*-----------------------------------------------------------------------*/
76 /* This one breaks process abstraction. Prototype is in console-msw.h,
77 used by select_process method in event-msw.c */
79 get_nt_process_handle (Lisp_Process *p)
81 return (NT_DATA (p)->h_process);
84 static struct Lisp_Process *
85 find_process_from_pid (DWORD pid)
87 Lisp_Object tail, proc;
89 for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
92 if (NT_DATA (XPROCESS (proc))->dwProcessId == pid)
93 return XPROCESS (proc);
99 /*-----------------------------------------------------------------------*/
100 /* Running remote threads. See Microsoft Systems Journal 1994 Number 5 */
101 /* Jeffrey Richter, Load Your 32-bit DLL into Another Process's Address..*/
102 /*-----------------------------------------------------------------------*/
112 * Allocate SIZE bytes in H_PROCESS address space. Fill in PMC used
113 * further by other routines. Return nonzero if successful.
115 * The memory in other process is allocated by creating a suspended
116 * thread. Initial stack of that thread is used as the memory
117 * block. The thread entry point is the routine ExitThread in
118 * kernel32.dll, so the allocated memory is freed just by resuming the
119 * thread, which immediately terminates after that.
123 alloc_process_memory (HANDLE h_process, size_t size,
126 LPTHREAD_START_ROUTINE adr_ExitThread =
127 (LPTHREAD_START_ROUTINE)
128 GetProcAddress (GetModuleHandle ("kernel32"), "ExitThread");
131 MEMORY_BASIC_INFORMATION mbi;
133 pmc->h_process = h_process;
134 pmc->h_thread = CreateRemoteThread (h_process, NULL, size,
135 adr_ExitThread, NULL,
136 CREATE_SUSPENDED, &dw_unused);
137 if (pmc->h_thread == NULL)
140 /* Get context, for thread's stack pointer */
141 context.ContextFlags = CONTEXT_CONTROL;
142 if (!GetThreadContext (pmc->h_thread, &context))
145 /* Determine base address of the committed range */
146 if (sizeof(mbi) != VirtualQueryEx (h_process,
148 (LPDWORD)context.Esp - 1,
149 #elif defined (_ALPHA_)
150 (LPDWORD)context.IntSp - 1,
152 #error Unknown processor architecture
157 /* Change the page protection of the allocated memory to executable,
159 if (!VirtualProtectEx (h_process, mbi.BaseAddress, size,
160 PAGE_EXECUTE_READWRITE, &dw_unused))
163 pmc->address = mbi.BaseAddress;
167 ResumeThread (pmc->h_thread);
173 free_process_memory (process_memory* pmc)
175 ResumeThread (pmc->h_thread);
179 * Run ROUTINE in the context of process determined by H_PROCESS. The
180 * routine is passed the address of DATA as parameter. The ROUTINE must
181 * not be longer than ROUTINE_CODE_SIZE bytes. DATA_SIZE is the size of
184 * Note that the code must be positionally independent, and compiled
185 * without stack checks (they cause implicit calls into CRT so will
186 * fail). DATA should not refer any data in calling process, as both
187 * routine and its data are copied into remote process. Size of data
188 * and code together should not exceed one page (4K on x86 systems).
190 * Return the value returned by ROUTINE, or (DWORD)-1 if call failed.
193 run_in_other_process (HANDLE h_process,
194 LPTHREAD_START_ROUTINE routine,
195 LPVOID data, size_t data_size)
198 const size_t code_size = FRAGMENT_CODE_SIZE;
199 /* Need at most 3 extra bytes of memory, for data alignment */
200 size_t total_size = code_size + data_size + 3;
205 /* Allocate memory */
206 if (!alloc_process_memory (h_process, total_size, &pm))
210 if (!WriteProcessMemory (h_process, pm.address, (LPVOID)routine,
217 remote_data = (LPBYTE)pm.address + ((code_size + 4) & ~3);
218 if (!WriteProcessMemory (h_process, remote_data, data, data_size, NULL))
224 /* Execute the remote copy of code, passing it remote data */
225 h_thread = CreateRemoteThread (h_process, NULL, 0,
226 (LPTHREAD_START_ROUTINE) pm.address,
227 remote_data, 0, &dw_unused);
228 if (h_thread == NULL)
231 /* Wait till thread finishes */
232 WaitForSingleObject (h_thread, INFINITE);
234 /* Free remote memory */
235 free_process_memory (&pm);
237 /* Return thread's exit code */
240 GetExitCodeThread (h_thread, &exit_code);
241 CloseHandle (h_thread);
246 free_process_memory (&pm);
250 /*-----------------------------------------------------------------------*/
251 /* Sending signals */
252 /*-----------------------------------------------------------------------*/
254 /* ---------------------------- the NT way ------------------------------- */
257 * We handle the following signals:
259 * SIGKILL, SIGTERM, SIGQUIT, SIGHUP - These four translate to ExitProcess
260 * executed by the remote process
261 * SIGINT - The remote process is sent CTRL_BREAK_EVENT
263 * The MSVC5.0 compiler feels free to re-order functions within a
264 * compilation unit, so we have no way of finding out the size of the
265 * following functions. Therefore these functions must not be larger than
266 * FRAGMENT_CODE_SIZE.
274 void (WINAPI *adr_ExitProcess) (UINT);
278 sigkill_proc (sigkill_data* data)
280 (*data->adr_ExitProcess)(255);
285 * Sending break or control c
289 BOOL (WINAPI *adr_GenerateConsoleCtrlEvent) (DWORD, DWORD);
294 sigint_proc (sigint_data* data)
296 return (*data->adr_GenerateConsoleCtrlEvent) (data->event, 0);
304 BOOL (WINAPI *adr_SetConsoleCtrlHandler) (LPVOID, BOOL);
308 sig_enable_proc (sig_enable_data* data)
310 (*data->adr_SetConsoleCtrlHandler) (NULL, FALSE);
315 * Send signal SIGNO to process H_PROCESS.
316 * Return nonzero if successful.
320 send_signal_the_nt_way (struct nt_process_data *cp, int pid, int signo)
323 HMODULE h_kernel = GetModuleHandle ("kernel32");
324 int close_process = 0;
327 assert (h_kernel != NULL);
331 pid = cp->dwProcessId;
332 h_process = cp->h_process;
337 /* Try to open the process with required privileges */
338 h_process = OpenProcess (PROCESS_CREATE_THREAD
339 | PROCESS_QUERY_INFORMATION
340 | PROCESS_VM_OPERATION
357 (void (WINAPI *) (UINT)) GetProcAddress (h_kernel, "ExitProcess");
358 assert (d.adr_ExitProcess);
359 retval = run_in_other_process (h_process,
360 (LPTHREAD_START_ROUTINE)sigkill_proc,
367 d.adr_GenerateConsoleCtrlEvent =
368 (BOOL (WINAPI *) (DWORD, DWORD))
369 GetProcAddress (h_kernel, "GenerateConsoleCtrlEvent");
370 assert (d.adr_GenerateConsoleCtrlEvent);
371 d.event = CTRL_C_EVENT;
372 retval = run_in_other_process (h_process,
373 (LPTHREAD_START_ROUTINE)sigint_proc,
382 CloseHandle (h_process);
383 return (int)retval > 0 ? 1 : 0;
387 * Enable CTRL_C_EVENT handling in a new child process
390 enable_child_signals (HANDLE h_process)
392 HMODULE h_kernel = GetModuleHandle ("kernel32");
395 assert (h_kernel != NULL);
396 d.adr_SetConsoleCtrlHandler =
397 (BOOL (WINAPI *) (LPVOID, BOOL))
398 GetProcAddress (h_kernel, "SetConsoleCtrlHandler");
399 assert (d.adr_SetConsoleCtrlHandler);
400 run_in_other_process (h_process, (LPTHREAD_START_ROUTINE)sig_enable_proc,
404 #pragma warning (default : 4113)
406 /* ---------------------------- the 95 way ------------------------------- */
409 find_child_console (HWND hwnd, long putada)
413 struct nt_process_data *cp = (struct nt_process_data *) putada;
415 thread_id = GetWindowThreadProcessId (hwnd, &process_id);
416 if (process_id == cp->dwProcessId)
418 char window_class[32];
420 GetClassName (hwnd, window_class, sizeof (window_class));
421 if (strcmp (window_class,
422 mswindows_windows9x_p ()
424 : "ConsoleWindowClass") == 0)
435 send_signal_the_95_way (struct nt_process_data *cp, int pid, int signo)
438 int close_process = 0;
443 pid = cp->dwProcessId;
444 h_process = cp->h_process;
446 /* Try to locate console window for process. */
447 EnumWindows (find_child_console, (LPARAM) cp);
452 /* Try to open the process with required privileges */
453 h_process = OpenProcess (PROCESS_TERMINATE, FALSE, pid);
460 if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
462 BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
463 BYTE vk_break_code = VK_CANCEL;
464 BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
465 HWND foreground_window;
467 if (break_scan_code == 0)
469 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
471 break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
474 foreground_window = GetForegroundWindow ();
475 if (foreground_window)
477 /* NT 5.0, and apparently also Windows 98, will not allow
478 a Window to be set to foreground directly without the
479 user's involvement. The workaround is to attach
480 ourselves to the thread that owns the foreground
481 window, since that is the only thread that can set the
482 foreground window. */
483 DWORD foreground_thread, child_thread;
485 GetWindowThreadProcessId (foreground_window, NULL);
486 if (foreground_thread == GetCurrentThreadId ()
487 || !AttachThreadInput (GetCurrentThreadId (),
488 foreground_thread, TRUE))
489 foreground_thread = 0;
491 child_thread = GetWindowThreadProcessId (cp->hwnd, NULL);
492 if (child_thread == GetCurrentThreadId ()
493 || !AttachThreadInput (GetCurrentThreadId (),
497 /* Set the foreground window to the child. */
498 if (SetForegroundWindow (cp->hwnd))
500 /* Generate keystrokes as if user had typed Ctrl-Break or
502 keybd_event (VK_CONTROL, control_scan_code, 0, 0);
503 keybd_event (vk_break_code, break_scan_code,
504 (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0);
505 keybd_event (vk_break_code, break_scan_code,
506 (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY)
507 | KEYEVENTF_KEYUP, 0);
508 keybd_event (VK_CONTROL, control_scan_code,
511 /* Sleep for a bit to give time for Emacs frame to respond
512 to focus change events (if Emacs was active app). */
515 SetForegroundWindow (foreground_window);
517 /* Detach from the foreground and child threads now that
518 the foreground switching is over. */
519 if (foreground_thread)
520 AttachThreadInput (GetCurrentThreadId (),
521 foreground_thread, FALSE);
523 AttachThreadInput (GetCurrentThreadId (),
524 child_thread, FALSE);
527 /* Ctrl-Break is NT equivalent of SIGINT. */
528 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
530 #if 0 /* FSF Emacs */
531 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
532 "for pid %lu\n", GetLastError (), pid));
540 if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
543 if (mswindows_windows9x_p ())
546 Another possibility is to try terminating the VDM out-right by
547 calling the Shell VxD (id 0x17) V86 interface, function #4
548 "SHELL_Destroy_VM", ie.
554 First need to determine the current VM handle, and then arrange for
555 the shellapi call to be made from the system vm (by using
556 Switch_VM_and_callback).
558 Could try to invoke DestroyVM through CallVxD.
562 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
563 to hang when cmdproxy is used in conjunction with
564 command.com for an interactive shell. Posting
565 WM_CLOSE pops up a dialog that, when Yes is selected,
566 does the same thing. TerminateProcess is also less
567 than ideal in that subprocesses tend to stick around
568 until the machine is shutdown, but at least it
569 doesn't freeze the 16-bit subsystem. */
570 PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
572 if (!TerminateProcess (h_process, 0xff))
574 #if 0 /* FSF Emacs */
575 DebPrint (("sys_kill.TerminateProcess returned %d "
576 "for pid %lu\n", GetLastError (), pid));
584 PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
586 /* Kill the process. On W32 this doesn't kill child processes
587 so it doesn't work very well for shells which is why it's not
588 used in every case. */
589 else if (!TerminateProcess (h_process, 0xff))
591 #if 0 /* FSF Emacs */
592 DebPrint (("sys_kill.TerminateProcess returned %d "
593 "for pid %lu\n", GetLastError (), pid));
601 CloseHandle (h_process);
606 /* -------------------------- all-OS functions ---------------------------- */
609 send_signal (struct nt_process_data *cp, int pid, int signo)
611 return (!mswindows_windows9x_p () && send_signal_the_nt_way (cp, pid, signo))
612 || send_signal_the_95_way (cp, pid, signo);
616 * Signal error if SIGNO is not supported
619 validate_signal_number (int signo)
621 if (signo != SIGKILL && signo != SIGTERM
622 && signo != SIGQUIT && signo != SIGINT
624 invalid_argument ("Signal number not supported", make_int (signo));
627 /*-----------------------------------------------------------------------*/
628 /* Process methods */
629 /*-----------------------------------------------------------------------*/
632 * Allocate and initialize Lisp_Process->process_data
636 nt_alloc_process_data (Lisp_Process *p)
638 p->process_data = xnew_and_zero (struct nt_process_data);
642 nt_finalize_process_data (Lisp_Process *p, int for_disksave)
644 assert (!for_disksave);
645 if (NT_DATA (p)->h_process)
646 CloseHandle (NT_DATA (p)->h_process);
650 * Initialize XEmacs process implementation once
653 nt_init_process (void)
655 /* Initialize winsock */
657 /* Request Winsock v1.1 Note the order: (minor=1, major=1) */
658 WSAStartup (MAKEWORD (1,1), &wsa_data);
662 * Fork off a subprocess. P is a pointer to newly created subprocess
663 * object. If this function signals, the caller is responsible for
664 * deleting (and finalizing) the process object.
666 * The method must return PID of the new process, a (positive??? ####) number
667 * which fits into Lisp_Int. No return value indicates an error, the method
668 * must signal an error instead.
672 signal_cannot_launch (Lisp_Object image_file, DWORD err)
674 mswindows_set_errno (err);
675 report_file_error ("Error starting", image_file);
679 ensure_console_window_exists (void)
681 if (mswindows_windows9x_p ())
682 mswindows_hide_console ();
686 compare_env (const void *strp1, const void *strp2)
688 const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
690 while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
692 if ((*str1) > (*str2))
694 else if ((*str1) < (*str2))
699 if (*str1 == '=' && *str2 == '=')
701 else if (*str1 == '=')
708 nt_create_process (Lisp_Process *p,
709 Lisp_Object *argv, int nargv,
710 Lisp_Object program, Lisp_Object cur_dir)
712 /* Synched up with sys_spawnve in FSF 20.6. Significantly different
713 but still synchable. */
714 HANDLE hmyshove, hmyslurp, hprocin, hprocout, hprocerr;
715 Extbyte *command_line;
716 BOOL do_io, windowed;
719 /* No need to DOS-ize the filename; expand-file-name (called prior)
720 already does this. */
722 /* Find out whether the application is windowed or not */
725 /* SHGetFileInfo tends to return ERROR_FILE_NOT_FOUND on most
726 errors. This leads to bogus error message. */
728 char *p = strrchr ((char *)XSTRING_DATA (program), '.');
730 (stricmp (p, ".exe") == 0 ||
731 stricmp (p, ".com") == 0 ||
732 stricmp (p, ".bat") == 0 ||
733 stricmp (p, ".cmd") == 0))
735 image_type = xSHGetFileInfoA ((char *)XSTRING_DATA (program), 0,NULL,
740 char progname[MAX_PATH];
741 sprintf (progname, "%s.exe", (char *)XSTRING_DATA (program));
742 image_type = xSHGetFileInfoA (progname, 0, NULL, 0, SHGFI_EXETYPE);
745 signal_cannot_launch (program, (GetLastError () == ERROR_FILE_NOT_FOUND
746 ? ERROR_BAD_FORMAT : GetLastError ()));
747 windowed = HIWORD (image_type) != 0;
749 else /* NT 3.5; we have no idea so just guess. */
752 /* Decide whether to do I/O on process handles, or just mark the
753 process exited immediately upon successful launching. We do I/O if the
754 process is a console one, or if it is windowed but windowed_process_io
756 do_io = !windowed || windowed_process_io ;
760 /* Create two unidirectional named pipes */
762 SECURITY_ATTRIBUTES sa;
764 sa.nLength = sizeof(sa);
765 sa.bInheritHandle = TRUE;
766 sa.lpSecurityDescriptor = NULL;
768 CreatePipe (&hprocin, &hmyshove, &sa, 0);
769 CreatePipe (&hmyslurp, &hprocout, &sa, 0);
771 /* Duplicate the stdout handle for use as stderr */
772 DuplicateHandle(GetCurrentProcess(), hprocout, GetCurrentProcess(),
773 &hprocerr, 0, TRUE, DUPLICATE_SAME_ACCESS);
775 /* Stupid Win32 allows to create a pipe with *both* ends either
776 inheritable or not. We need process ends inheritable, and local
777 ends not inheritable. */
778 DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(),
780 DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
782 DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(),
784 DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
788 /* Convert an argv vector into Win32 style command line by a call to
789 lisp function `mswindows-construct-process-command-line'
790 (in win32-native.el) */
793 Lisp_Object args_or_ret = Qnil;
796 GCPRO1 (args_or_ret);
798 for (i = 0; i < nargv; ++i)
799 args_or_ret = Fcons (*argv++, args_or_ret);
800 args_or_ret = Fnreverse (args_or_ret);
801 args_or_ret = Fcons (program, args_or_ret);
803 args_or_ret = call1 (Qmswindows_construct_process_command_line,
806 if (!STRINGP (args_or_ret))
807 /* Luser wrote his/her own clever version */
809 ("Bogus return value from `mswindows-construct-process-command-line'",
812 LISP_STRING_TO_EXTERNAL (args_or_ret, command_line, Qmswindows_tstr);
814 UNGCPRO; /* args_or_ret */
817 /* Set `proc_env' to a nul-separated array of the strings in
818 Vprocess_environment terminated by 2 nuls. */
822 REGISTER Lisp_Object tem;
823 REGISTER char **new_env;
824 REGISTER int new_length = 0, i, new_space;
827 for (tem = Vprocess_environment;
829 && STRINGP (XCAR (tem)));
833 /* FSF adds an extra env var to hold the current process ID of the
834 Emacs process. Apparently this is used only by emacsserver.c,
835 which we have superseded to gnuserv.c. (#### Does it work under
838 sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d",
839 GetCurrentProcessId ());
840 arglen += strlen (ppid_env_var_buffer) + 1;
844 /* new_length + 1 to include terminating 0. */
845 env = new_env = alloca_array (char *, new_length + 1);
847 /* Copy the Vprocess_environment strings into new_env. */
848 for (tem = Vprocess_environment;
850 && STRINGP (XCAR (tem)));
854 char *string = (char *) XSTRING_DATA (XCAR (tem));
855 /* See if this string duplicates any string already in the env.
856 If so, don't put it in.
857 When an env var has multiple definitions,
858 we keep the definition that comes first in process-environment. */
859 for (; ep != new_env; ep++)
861 char *p = *ep, *q = string;
865 /* The string is malformed; might as well drop it. */
879 /* Sort the environment variables */
880 new_length = new_env - env;
881 qsort (env, new_length, sizeof (char *), compare_env);
883 /* Work out how much space to allocate */
885 for (i = 0; i < new_length; i++)
887 new_space += strlen(env[i]) + 1;
891 /* Allocate space and copy variables into it */
892 penv = proc_env = (char*) alloca(new_space);
893 for (i = 0; i < new_length; i++)
895 strcpy(penv, env[i]);
896 penv += strlen(env[i]) + 1;
902 /* #### we need to port this. */
903 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
904 application to start it by specifying the helper app as cmdname,
905 while leaving the real app name as argv[0]. */
908 cmdname = (char*) alloca (MAXPATHLEN);
909 if (egetenv ("CMDPROXY"))
910 strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
913 strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
914 strcat ((char*)cmdname, "cmdproxy.exe");
922 PROCESS_INFORMATION pi;
927 si.dwFlags = STARTF_USESHOWWINDOW;
928 si.wShowWindow = windowed ? SW_SHOWNORMAL : SW_HIDE;
931 si.hStdInput = hprocin;
932 si.hStdOutput = hprocout;
933 si.hStdError = hprocerr;
934 si.dwFlags |= STARTF_USESTDHANDLES;
937 flags = CREATE_SUSPENDED;
938 if (mswindows_windows9x_p ())
939 flags |= (!NILP (Vmswindows_start_process_share_console)
940 ? CREATE_NEW_PROCESS_GROUP
941 : CREATE_NEW_CONSOLE);
943 flags |= CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP;
944 if (NILP (Vmswindows_start_process_inherit_error_mode))
945 flags |= CREATE_DEFAULT_ERROR_MODE;
947 ensure_console_window_exists ();
949 err = (CreateProcess (NULL, command_line, NULL, NULL, TRUE, flags,
950 proc_env, (char *) XSTRING_DATA (cur_dir), &si, &pi)
951 ? 0 : GetLastError ());
955 /* These just have been inherited; we do not need a copy */
956 CloseHandle (hprocin);
957 CloseHandle (hprocout);
958 CloseHandle (hprocerr);
961 /* Handle process creation failure */
966 CloseHandle (hmyshove);
967 CloseHandle (hmyslurp);
969 signal_cannot_launch (program, GetLastError ());
972 /* The process started successfully */
975 NT_DATA(p)->h_process = pi.hProcess;
976 NT_DATA(p)->dwProcessId = pi.dwProcessId;
977 init_process_io_handles (p, (void*)hmyslurp, (void*)hmyshove, 0);
981 /* Indicate as if the process has exited immediately. */
982 p->status_symbol = Qexit;
983 CloseHandle (pi.hProcess);
987 enable_child_signals (pi.hProcess);
989 ResumeThread (pi.hThread);
990 CloseHandle (pi.hThread);
992 return ((int)pi.dwProcessId);
997 * This method is called to update status fields of the process
998 * structure. If the process has not existed, this method is expected
1001 * The method is called only for real child processes.
1005 nt_update_status_if_terminated (Lisp_Process* p)
1008 if (GetExitCodeProcess (NT_DATA(p)->h_process, &exit_code)
1009 && exit_code != STILL_ACTIVE)
1013 /* The exit code can be a code returned by process, or an
1014 NTSTATUS value. We cannot accurately handle the latter since
1015 it is a full 32 bit integer */
1016 if (exit_code & 0xC0000000)
1018 p->status_symbol = Qsignal;
1019 p->exit_code = exit_code & 0x1FFFFFFF;
1023 p->status_symbol = Qexit;
1024 p->exit_code = exit_code;
1030 * Stuff the entire contents of LSTREAM to the process output pipe
1033 /* #### If only this function could be somehow merged with
1034 unix_send_process... */
1037 nt_send_process (Lisp_Object proc, struct lstream* lstream)
1039 volatile Lisp_Object vol_proc = proc;
1040 Lisp_Process *volatile p = XPROCESS (proc);
1042 /* use a reasonable-sized buffer (somewhere around the size of the
1043 stream buffer) so as to avoid inundating the stream with blocked
1045 Bufbyte chunkbuf[512];
1050 Lstream_data_count writeret;
1052 chunklen = Lstream_read (lstream, chunkbuf, 512);
1054 break; /* perhaps should abort() if < 0?
1055 This should never happen. */
1057 /* Lstream_write() will never successfully write less than the
1058 amount sent in. In the worst case, it just buffers the
1060 writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM(p)), chunkbuf,
1062 Lstream_flush (XLSTREAM (DATA_OUTSTREAM(p)));
1065 p->status_symbol = Qexit;
1066 p->exit_code = ERROR_BROKEN_PIPE;
1070 deactivate_process (*((Lisp_Object *) (&vol_proc)));
1071 invalid_operation ("Broken pipe error sending to process; closed it",
1077 while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
1079 /* Buffer is full. Wait, accepting input; that may allow
1080 the program to finish doing output and read more. */
1081 Faccept_process_output (Qnil, Qzero, make_int (wait_ms));
1082 Lstream_flush (XLSTREAM (p->pipe_outstream));
1083 wait_ms = min (1000, 2 * wait_ms);
1090 * Send a signal number SIGNO to PROCESS.
1091 * CURRENT_GROUP means send to the process group that currently owns
1092 * the terminal being used to communicate with PROCESS.
1093 * This is used for various commands in shell mode.
1094 * If NOMSG is zero, insert signal-announcements into process's buffers
1097 * If we can, we try to signal PROCESS by sending control characters
1098 * down the pty. This allows us to signal inferiors who have changed
1099 * their uid, for which killpg would return an EPERM error.
1101 * The method signals an error if the given SIGNO is not valid
1105 nt_kill_child_process (Lisp_Object proc, int signo,
1106 int current_group, int nomsg)
1108 Lisp_Process *p = XPROCESS (proc);
1110 /* Signal error if SIGNO cannot be sent */
1111 validate_signal_number (signo);
1114 if (!send_signal (NT_DATA (p), 0, signo))
1115 invalid_operation ("Cannot send signal to process", proc);
1119 * Kill any process in the system given its PID
1121 * Returns zero if a signal successfully sent, or
1122 * negative number upon failure
1125 nt_kill_process_by_pid (int pid, int signo)
1127 struct Lisp_Process *p;
1129 /* Signal error if SIGNO cannot be sent */
1130 validate_signal_number (signo);
1132 p = find_process_from_pid (pid);
1133 return send_signal (p ? NT_DATA (p) : 0, pid, signo) ? 0 : -1;
1136 /*-----------------------------------------------------------------------*/
1137 /* Sockets connections */
1138 /*-----------------------------------------------------------------------*/
1141 /* #### Hey MS, how long Winsock 2 for '95 will be in beta? */
1143 #define SOCK_TIMER_ID 666
1144 #define XM_SOCKREPLY (WM_USER + 666)
1147 get_internet_address (Lisp_Object host, struct sockaddr_in *address,
1148 Error_behavior errb)
1150 char buf [MAXGETHOSTSTRUCT];
1155 address->sin_family = AF_INET;
1157 /* First check if HOST is already a numeric address */
1159 unsigned long inaddr = inet_addr (XSTRING_DATA (host));
1160 if (inaddr != INADDR_NONE)
1162 address->sin_addr.s_addr = inaddr;
1167 /* Create a window which will receive completion messages */
1168 hwnd = CreateWindow ("STATIC", NULL, WS_OVERLAPPED, 0, 0, 1, 1,
1169 NULL, NULL, NULL, NULL);
1172 /* Post name resolution request */
1173 hasync = WSAAsyncGetHostByName (hwnd, XM_SOCKREPLY, XSTRING_DATA (host),
1178 /* Set a timer to poll for quit every 250 ms */
1179 SetTimer (hwnd, SOCK_TIMER_ID, 250, NULL);
1184 GetMessage (&msg, hwnd, 0, 0);
1185 if (msg.message == XM_SOCKREPLY)
1187 /* Ok, got an answer */
1188 if (WSAGETASYNCERROR(msg.lParam) == NO_ERROR)
1192 warn_when_safe(Qstream, Qwarning,
1193 "cannot get IP address for host \"%s\"",
1194 XSTRING_DATA (host));
1198 else if (msg.message == WM_TIMER && msg.wParam == SOCK_TIMER_ID)
1202 WSACancelAsyncRequest (hasync);
1203 KillTimer (hwnd, SOCK_TIMER_ID);
1204 DestroyWindow (hwnd);
1208 DispatchMessage (&msg);
1212 KillTimer (hwnd, SOCK_TIMER_ID);
1213 DestroyWindow (hwnd);
1216 /* BUF starts with struct hostent */
1217 struct hostent* he = (struct hostent*) buf;
1218 address->sin_addr.s_addr = *(unsigned long*)he->h_addr_list[0];
1224 nt_canonicalize_host_name (Lisp_Object host)
1226 struct sockaddr_in address;
1228 if (!get_internet_address (host, &address, ERROR_ME_NOT))
1231 if (address.sin_family == AF_INET)
1232 return build_string (inet_ntoa (address.sin_addr));
1237 /* open a TCP network connection to a given HOST/SERVICE. Treated
1238 exactly like a normal process when reading and writing. Only
1239 differences are in status display and process deletion. A network
1240 connection has no PID; you cannot signal it. All you can do is
1241 deactivate and close it via delete-process */
1244 nt_open_network_stream (Lisp_Object name, Lisp_Object host,
1245 Lisp_Object service,
1246 Lisp_Object protocol, void** vinfd, void** voutfd)
1248 /* !!#### not Mule-ized */
1249 struct sockaddr_in address;
1254 CHECK_STRING (host);
1256 if (!EQ (protocol, Qtcp))
1257 invalid_argument ("Unsupported protocol", protocol);
1260 port = htons ((unsigned short) XINT (service));
1263 struct servent *svc_info;
1264 CHECK_STRING (service);
1265 svc_info = getservbyname ((char *) XSTRING_DATA (service), "tcp");
1267 invalid_argument ("Unknown service", service);
1268 port = svc_info->s_port;
1271 get_internet_address (host, &address, ERROR_ME);
1272 address.sin_port = port;
1274 s = socket (address.sin_family, SOCK_STREAM, 0);
1276 report_file_error ("error creating socket", list1 (name));
1278 /* We don't want to be blocked on connect */
1280 unsigned long nonblock = 1;
1281 ioctlsocket (s, FIONBIO, &nonblock);
1284 retval = connect (s, (struct sockaddr *) &address, sizeof (address));
1285 if (retval != NO_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
1286 goto connect_failed;
1287 /* Wait while connection is established */
1300 /* Poll for quit every 250 ms */
1302 tv.tv_usec = 250 * 1000;
1306 nsel = select (0, NULL, &fdset, &fdset, &tv);
1310 /* Check: was connection successful or not? */
1312 nsel = select (0, NULL, NULL, &fdset, &tv);
1314 goto connect_failed;
1320 /* We are connected at this point */
1322 DuplicateHandle (GetCurrentProcess(), (HANDLE)s,
1323 GetCurrentProcess(), (LPHANDLE)voutfd,
1324 0, FALSE, DUPLICATE_SAME_ACCESS);
1331 warn_when_safe (Qstream, Qwarning,
1332 "failure to open network stream to host \"%s\" for service \"%d\"",
1333 XSTRING_DATA (host),
1334 (unsigned short) XINT (service));
1338 warn_when_safe (Qstream, Qwarning,
1339 "failure to open network stream to host \"%s\" for service \"%s\"",
1340 XSTRING_DATA (host),
1341 XSTRING_DATA (service));
1343 report_file_error ("connection failed", list2 (host, name));
1348 /*-----------------------------------------------------------------------*/
1349 /* Initialization */
1350 /*-----------------------------------------------------------------------*/
1353 process_type_create_nt (void)
1355 PROCESS_HAS_METHOD (nt, alloc_process_data);
1356 PROCESS_HAS_METHOD (nt, finalize_process_data);
1357 PROCESS_HAS_METHOD (nt, init_process);
1358 PROCESS_HAS_METHOD (nt, create_process);
1359 PROCESS_HAS_METHOD (nt, update_status_if_terminated);
1360 PROCESS_HAS_METHOD (nt, send_process);
1361 PROCESS_HAS_METHOD (nt, kill_child_process);
1362 PROCESS_HAS_METHOD (nt, kill_process_by_pid);
1364 PROCESS_HAS_METHOD (nt, canonicalize_host_name);
1365 PROCESS_HAS_METHOD (nt, open_network_stream);
1366 #ifdef HAVE_MULTICAST
1367 #error I won't do this until '95 has winsock2
1368 PROCESS_HAS_METHOD (nt, open_multicast_group);
1374 syms_of_process_nt (void)
1376 DEFSYMBOL (Qmswindows_construct_process_command_line);
1380 vars_of_process_nt (void)
1382 DEFVAR_LISP ("mswindows-start-process-share-console",
1383 &Vmswindows_start_process_share_console /*
1384 When nil, new child processes are given a new console.
1385 When non-nil, they share the Emacs console; this has the limitation of
1386 allowing only one DOS subprocess to run at a time (whether started directly
1387 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
1388 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
1389 otherwise respond to interrupts from Emacs.
1391 Vmswindows_start_process_share_console = Qnil;
1393 DEFVAR_LISP ("mswindows-start-process-inherit-error-mode",
1394 &Vmswindows_start_process_inherit_error_mode /*
1395 "When nil, new child processes revert to the default error mode.
1396 When non-nil, they inherit their error mode setting from Emacs, which stops
1397 them blocking when trying to access unmounted drives etc.
1399 Vmswindows_start_process_inherit_error_mode = Qt;