428
+ − 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.
563
+ − 5 Copyright (C) 1995, 1996, 2000, 2001 Ben Wing.
428
+ − 6
+ − 7 This file is part of XEmacs.
+ − 8
+ − 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
+ − 12 later version.
+ − 13
+ − 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
+ − 17 for more details.
+ − 18
+ − 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. */
+ − 23
+ − 24 /* Written by Kirill M. Katsnelson <kkm@kis.ru>, April 1998 */
+ − 25
+ − 26 #include <config.h>
+ − 27 #include "lisp.h"
+ − 28
442
+ − 29 #include "buffer.h"
+ − 30 #include "console-msw.h"
428
+ − 31 #include "hash.h"
+ − 32 #include "lstream.h"
442
+ − 33 #include "nt.h"
428
+ − 34 #include "process.h"
+ − 35 #include "procimpl.h"
+ − 36 #include "sysdep.h"
+ − 37
558
+ − 38 #include "syssignal.h"
+ − 39 #include "sysfile.h"
+ − 40 #include "sysproc.h"
428
+ − 41
442
+ − 42 /* Bound by win32-native.el */
+ − 43 Lisp_Object Qmswindows_construct_process_command_line;
+ − 44
428
+ − 45 /* Arbitrary size limit for code fragments passed to run_in_other_process */
+ − 46 #define FRAGMENT_CODE_SIZE 32
+ − 47
+ − 48 /* Implementation-specific data. Pointed to by Lisp_Process->process_data */
+ − 49 struct nt_process_data
+ − 50 {
+ − 51 HANDLE h_process;
442
+ − 52 DWORD dwProcessId;
+ − 53 HWND hwnd; /* console window */
428
+ − 54 };
+ − 55
442
+ − 56 /* Control whether create_child causes the process to inherit Emacs'
+ − 57 console window, or be given a new one of its own. The default is
+ − 58 nil, to allow multiple DOS programs to run on Win95. Having separate
+ − 59 consoles also allows Emacs to cleanly terminate process groups. */
+ − 60 Lisp_Object Vmswindows_start_process_share_console;
+ − 61
+ − 62 /* Control whether create_child cause the process to inherit Emacs'
+ − 63 error mode setting. The default is t, to minimize the possibility of
+ − 64 subprocesses blocking when accessing unmounted drives. */
+ − 65 Lisp_Object Vmswindows_start_process_inherit_error_mode;
+ − 66
428
+ − 67 #define NT_DATA(p) ((struct nt_process_data*)((p)->process_data))
+ − 68
+ − 69 /*-----------------------------------------------------------------------*/
+ − 70 /* Process helpers */
+ − 71 /*-----------------------------------------------------------------------*/
+ − 72
+ − 73 /* This one breaks process abstraction. Prototype is in console-msw.h,
+ − 74 used by select_process method in event-msw.c */
+ − 75 HANDLE
440
+ − 76 get_nt_process_handle (Lisp_Process *p)
428
+ − 77 {
+ − 78 return (NT_DATA (p)->h_process);
+ − 79 }
442
+ − 80
+ − 81 static struct Lisp_Process *
+ − 82 find_process_from_pid (DWORD pid)
+ − 83 {
+ − 84 Lisp_Object tail, proc;
+ − 85
+ − 86 for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
+ − 87 {
+ − 88 proc = XCAR (tail);
+ − 89 if (NT_DATA (XPROCESS (proc))->dwProcessId == pid)
+ − 90 return XPROCESS (proc);
+ − 91 }
+ − 92 return 0;
+ − 93 }
+ − 94
428
+ − 95
+ − 96 /*-----------------------------------------------------------------------*/
+ − 97 /* Running remote threads. See Microsoft Systems Journal 1994 Number 5 */
+ − 98 /* Jeffrey Richter, Load Your 32-bit DLL into Another Process's Address..*/
+ − 99 /*-----------------------------------------------------------------------*/
+ − 100
+ − 101 typedef struct
+ − 102 {
+ − 103 HANDLE h_process;
+ − 104 HANDLE h_thread;
+ − 105 LPVOID address;
+ − 106 } process_memory;
+ − 107
+ − 108 /*
+ − 109 * Allocate SIZE bytes in H_PROCESS address space. Fill in PMC used
+ − 110 * further by other routines. Return nonzero if successful.
+ − 111 *
+ − 112 * The memory in other process is allocated by creating a suspended
+ − 113 * thread. Initial stack of that thread is used as the memory
+ − 114 * block. The thread entry point is the routine ExitThread in
+ − 115 * kernel32.dll, so the allocated memory is freed just by resuming the
+ − 116 * thread, which immediately terminates after that.
+ − 117 */
+ − 118
+ − 119 static int
+ − 120 alloc_process_memory (HANDLE h_process, size_t size,
+ − 121 process_memory* pmc)
+ − 122 {
+ − 123 LPTHREAD_START_ROUTINE adr_ExitThread =
+ − 124 (LPTHREAD_START_ROUTINE)
+ − 125 GetProcAddress (GetModuleHandle ("kernel32"), "ExitThread");
+ − 126 DWORD dw_unused;
+ − 127 CONTEXT context;
+ − 128 MEMORY_BASIC_INFORMATION mbi;
+ − 129
+ − 130 pmc->h_process = h_process;
+ − 131 pmc->h_thread = CreateRemoteThread (h_process, NULL, size,
+ − 132 adr_ExitThread, NULL,
+ − 133 CREATE_SUSPENDED, &dw_unused);
+ − 134 if (pmc->h_thread == NULL)
+ − 135 return 0;
+ − 136
+ − 137 /* Get context, for thread's stack pointer */
+ − 138 context.ContextFlags = CONTEXT_CONTROL;
+ − 139 if (!GetThreadContext (pmc->h_thread, &context))
+ − 140 goto failure;
+ − 141
+ − 142 /* Determine base address of the committed range */
+ − 143 if (sizeof(mbi) != VirtualQueryEx (h_process,
+ − 144 #if defined (_X86_)
+ − 145 (LPDWORD)context.Esp - 1,
+ − 146 #elif defined (_ALPHA_)
+ − 147 (LPDWORD)context.IntSp - 1,
+ − 148 #else
+ − 149 #error Unknown processor architecture
+ − 150 #endif
+ − 151 &mbi, sizeof(mbi)))
+ − 152 goto failure;
+ − 153
+ − 154 /* Change the page protection of the allocated memory to executable,
+ − 155 read, and write. */
+ − 156 if (!VirtualProtectEx (h_process, mbi.BaseAddress, size,
+ − 157 PAGE_EXECUTE_READWRITE, &dw_unused))
+ − 158 goto failure;
+ − 159
+ − 160 pmc->address = mbi.BaseAddress;
+ − 161 return 1;
+ − 162
+ − 163 failure:
+ − 164 ResumeThread (pmc->h_thread);
+ − 165 pmc->address = 0;
+ − 166 return 0;
+ − 167 }
+ − 168
+ − 169 static void
+ − 170 free_process_memory (process_memory* pmc)
+ − 171 {
+ − 172 ResumeThread (pmc->h_thread);
+ − 173 }
+ − 174
+ − 175 /*
+ − 176 * Run ROUTINE in the context of process determined by H_PROCESS. The
+ − 177 * routine is passed the address of DATA as parameter. The ROUTINE must
+ − 178 * not be longer than ROUTINE_CODE_SIZE bytes. DATA_SIZE is the size of
+ − 179 * DATA structure.
+ − 180 *
+ − 181 * Note that the code must be positionally independent, and compiled
+ − 182 * without stack checks (they cause implicit calls into CRT so will
+ − 183 * fail). DATA should not refer any data in calling process, as both
+ − 184 * routine and its data are copied into remote process. Size of data
+ − 185 * and code together should not exceed one page (4K on x86 systems).
+ − 186 *
+ − 187 * Return the value returned by ROUTINE, or (DWORD)-1 if call failed.
+ − 188 */
+ − 189 static DWORD
+ − 190 run_in_other_process (HANDLE h_process,
+ − 191 LPTHREAD_START_ROUTINE routine,
+ − 192 LPVOID data, size_t data_size)
+ − 193 {
+ − 194 process_memory pm;
442
+ − 195 const size_t code_size = FRAGMENT_CODE_SIZE;
428
+ − 196 /* Need at most 3 extra bytes of memory, for data alignment */
+ − 197 size_t total_size = code_size + data_size + 3;
+ − 198 LPVOID remote_data;
+ − 199 HANDLE h_thread;
+ − 200 DWORD dw_unused;
+ − 201
+ − 202 /* Allocate memory */
+ − 203 if (!alloc_process_memory (h_process, total_size, &pm))
+ − 204 return (DWORD)-1;
+ − 205
+ − 206 /* Copy code */
+ − 207 if (!WriteProcessMemory (h_process, pm.address, (LPVOID)routine,
+ − 208 code_size, NULL))
+ − 209 goto failure;
+ − 210
+ − 211 /* Copy data */
+ − 212 if (data_size)
+ − 213 {
+ − 214 remote_data = (LPBYTE)pm.address + ((code_size + 4) & ~3);
+ − 215 if (!WriteProcessMemory (h_process, remote_data, data, data_size, NULL))
+ − 216 goto failure;
+ − 217 }
+ − 218 else
+ − 219 remote_data = NULL;
+ − 220
+ − 221 /* Execute the remote copy of code, passing it remote data */
+ − 222 h_thread = CreateRemoteThread (h_process, NULL, 0,
+ − 223 (LPTHREAD_START_ROUTINE) pm.address,
+ − 224 remote_data, 0, &dw_unused);
+ − 225 if (h_thread == NULL)
+ − 226 goto failure;
+ − 227
+ − 228 /* Wait till thread finishes */
+ − 229 WaitForSingleObject (h_thread, INFINITE);
+ − 230
+ − 231 /* Free remote memory */
+ − 232 free_process_memory (&pm);
+ − 233
+ − 234 /* Return thread's exit code */
+ − 235 {
+ − 236 DWORD exit_code;
+ − 237 GetExitCodeThread (h_thread, &exit_code);
+ − 238 CloseHandle (h_thread);
+ − 239 return exit_code;
+ − 240 }
+ − 241
+ − 242 failure:
+ − 243 free_process_memory (&pm);
+ − 244 return (DWORD)-1;
+ − 245 }
+ − 246
+ − 247 /*-----------------------------------------------------------------------*/
+ − 248 /* Sending signals */
+ − 249 /*-----------------------------------------------------------------------*/
+ − 250
442
+ − 251 /* ---------------------------- the NT way ------------------------------- */
+ − 252
428
+ − 253 /*
+ − 254 * We handle the following signals:
+ − 255 *
+ − 256 * SIGKILL, SIGTERM, SIGQUIT, SIGHUP - These four translate to ExitProcess
+ − 257 * executed by the remote process
+ − 258 * SIGINT - The remote process is sent CTRL_BREAK_EVENT
+ − 259 *
+ − 260 * The MSVC5.0 compiler feels free to re-order functions within a
+ − 261 * compilation unit, so we have no way of finding out the size of the
+ − 262 * following functions. Therefore these functions must not be larger than
+ − 263 * FRAGMENT_CODE_SIZE.
+ − 264 */
+ − 265
+ − 266 /*
+ − 267 * Sending SIGKILL
+ − 268 */
+ − 269 typedef struct
+ − 270 {
+ − 271 void (WINAPI *adr_ExitProcess) (UINT);
+ − 272 } sigkill_data;
+ − 273
+ − 274 static DWORD WINAPI
+ − 275 sigkill_proc (sigkill_data* data)
+ − 276 {
+ − 277 (*data->adr_ExitProcess)(255);
+ − 278 return 1;
+ − 279 }
+ − 280
+ − 281 /*
+ − 282 * Sending break or control c
+ − 283 */
+ − 284 typedef struct
+ − 285 {
+ − 286 BOOL (WINAPI *adr_GenerateConsoleCtrlEvent) (DWORD, DWORD);
+ − 287 DWORD event;
+ − 288 } sigint_data;
+ − 289
+ − 290 static DWORD WINAPI
+ − 291 sigint_proc (sigint_data* data)
+ − 292 {
+ − 293 return (*data->adr_GenerateConsoleCtrlEvent) (data->event, 0);
+ − 294 }
+ − 295
+ − 296 /*
+ − 297 * Enabling signals
+ − 298 */
+ − 299 typedef struct
+ − 300 {
+ − 301 BOOL (WINAPI *adr_SetConsoleCtrlHandler) (LPVOID, BOOL);
+ − 302 } sig_enable_data;
+ − 303
+ − 304 static DWORD WINAPI
+ − 305 sig_enable_proc (sig_enable_data* data)
+ − 306 {
+ − 307 (*data->adr_SetConsoleCtrlHandler) (NULL, FALSE);
+ − 308 return 1;
+ − 309 }
+ − 310
+ − 311 /*
+ − 312 * Send signal SIGNO to process H_PROCESS.
+ − 313 * Return nonzero if successful.
+ − 314 */
+ − 315
+ − 316 static int
442
+ − 317 send_signal_the_nt_way (struct nt_process_data *cp, int pid, int signo)
428
+ − 318 {
442
+ − 319 HANDLE h_process;
428
+ − 320 HMODULE h_kernel = GetModuleHandle ("kernel32");
442
+ − 321 int close_process = 0;
428
+ − 322 DWORD retval;
+ − 323
+ − 324 assert (h_kernel != NULL);
+ − 325
442
+ − 326 if (cp)
+ − 327 {
+ − 328 pid = cp->dwProcessId;
+ − 329 h_process = cp->h_process;
+ − 330 }
+ − 331 else
+ − 332 {
+ − 333 close_process = 1;
+ − 334 /* Try to open the process with required privileges */
+ − 335 h_process = OpenProcess (PROCESS_CREATE_THREAD
+ − 336 | PROCESS_QUERY_INFORMATION
+ − 337 | PROCESS_VM_OPERATION
+ − 338 | PROCESS_VM_WRITE,
+ − 339 FALSE, pid);
+ − 340 if (!h_process)
+ − 341 return 0;
+ − 342 }
+ − 343
428
+ − 344 switch (signo)
+ − 345 {
+ − 346 case SIGKILL:
+ − 347 case SIGTERM:
+ − 348 case SIGQUIT:
+ − 349 case SIGHUP:
+ − 350 {
+ − 351 sigkill_data d;
442
+ − 352
+ − 353 d.adr_ExitProcess =
+ − 354 (void (WINAPI *) (UINT)) GetProcAddress (h_kernel, "ExitProcess");
428
+ − 355 assert (d.adr_ExitProcess);
+ − 356 retval = run_in_other_process (h_process,
+ − 357 (LPTHREAD_START_ROUTINE)sigkill_proc,
+ − 358 &d, sizeof (d));
+ − 359 break;
+ − 360 }
+ − 361 case SIGINT:
+ − 362 {
+ − 363 sigint_data d;
+ − 364 d.adr_GenerateConsoleCtrlEvent =
442
+ − 365 (BOOL (WINAPI *) (DWORD, DWORD))
428
+ − 366 GetProcAddress (h_kernel, "GenerateConsoleCtrlEvent");
+ − 367 assert (d.adr_GenerateConsoleCtrlEvent);
+ − 368 d.event = CTRL_C_EVENT;
+ − 369 retval = run_in_other_process (h_process,
+ − 370 (LPTHREAD_START_ROUTINE)sigint_proc,
+ − 371 &d, sizeof (d));
+ − 372 break;
+ − 373 }
+ − 374 default:
+ − 375 assert (0);
+ − 376 }
+ − 377
442
+ − 378 if (close_process)
+ − 379 CloseHandle (h_process);
428
+ − 380 return (int)retval > 0 ? 1 : 0;
+ − 381 }
+ − 382
+ − 383 /*
+ − 384 * Enable CTRL_C_EVENT handling in a new child process
+ − 385 */
+ − 386 static void
+ − 387 enable_child_signals (HANDLE h_process)
+ − 388 {
+ − 389 HMODULE h_kernel = GetModuleHandle ("kernel32");
+ − 390 sig_enable_data d;
+ − 391
+ − 392 assert (h_kernel != NULL);
+ − 393 d.adr_SetConsoleCtrlHandler =
442
+ − 394 (BOOL (WINAPI *) (LPVOID, BOOL))
428
+ − 395 GetProcAddress (h_kernel, "SetConsoleCtrlHandler");
+ − 396 assert (d.adr_SetConsoleCtrlHandler);
+ − 397 run_in_other_process (h_process, (LPTHREAD_START_ROUTINE)sig_enable_proc,
+ − 398 &d, sizeof (d));
+ − 399 }
+ − 400
+ − 401 #pragma warning (default : 4113)
+ − 402
442
+ − 403 /* ---------------------------- the 95 way ------------------------------- */
+ − 404
+ − 405 static BOOL CALLBACK
+ − 406 find_child_console (HWND hwnd, long putada)
+ − 407 {
+ − 408 DWORD thread_id;
+ − 409 DWORD process_id;
+ − 410 struct nt_process_data *cp = (struct nt_process_data *) putada;
+ − 411
+ − 412 thread_id = GetWindowThreadProcessId (hwnd, &process_id);
+ − 413 if (process_id == cp->dwProcessId)
+ − 414 {
+ − 415 char window_class[32];
+ − 416
+ − 417 GetClassName (hwnd, window_class, sizeof (window_class));
+ − 418 if (strcmp (window_class,
+ − 419 mswindows_windows9x_p ()
+ − 420 ? "tty"
+ − 421 : "ConsoleWindowClass") == 0)
+ − 422 {
+ − 423 cp->hwnd = hwnd;
+ − 424 return FALSE;
+ − 425 }
+ − 426 }
+ − 427 /* keep looking */
+ − 428 return TRUE;
+ − 429 }
+ − 430
+ − 431 static int
+ − 432 send_signal_the_95_way (struct nt_process_data *cp, int pid, int signo)
+ − 433 {
+ − 434 HANDLE h_process;
+ − 435 int close_process = 0;
+ − 436 int rc = 1;
+ − 437
+ − 438 if (cp)
+ − 439 {
+ − 440 pid = cp->dwProcessId;
+ − 441 h_process = cp->h_process;
+ − 442
+ − 443 /* Try to locate console window for process. */
+ − 444 EnumWindows (find_child_console, (LPARAM) cp);
+ − 445 }
+ − 446 else
+ − 447 {
+ − 448 close_process = 1;
+ − 449 /* Try to open the process with required privileges */
+ − 450 h_process = OpenProcess (PROCESS_TERMINATE, FALSE, pid);
+ − 451 if (!h_process)
+ − 452 return 0;
+ − 453 }
+ − 454
+ − 455 if (signo == SIGINT)
+ − 456 {
+ − 457 if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
+ − 458 {
+ − 459 BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
+ − 460 BYTE vk_break_code = VK_CANCEL;
+ − 461 BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
+ − 462 HWND foreground_window;
+ − 463
+ − 464 if (break_scan_code == 0)
+ − 465 {
+ − 466 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
+ − 467 vk_break_code = 'C';
+ − 468 break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
+ − 469 }
+ − 470
+ − 471 foreground_window = GetForegroundWindow ();
+ − 472 if (foreground_window)
+ − 473 {
+ − 474 /* NT 5.0, and apparently also Windows 98, will not allow
+ − 475 a Window to be set to foreground directly without the
+ − 476 user's involvement. The workaround is to attach
+ − 477 ourselves to the thread that owns the foreground
+ − 478 window, since that is the only thread that can set the
+ − 479 foreground window. */
+ − 480 DWORD foreground_thread, child_thread;
+ − 481 foreground_thread =
+ − 482 GetWindowThreadProcessId (foreground_window, NULL);
+ − 483 if (foreground_thread == GetCurrentThreadId ()
+ − 484 || !AttachThreadInput (GetCurrentThreadId (),
+ − 485 foreground_thread, TRUE))
+ − 486 foreground_thread = 0;
+ − 487
+ − 488 child_thread = GetWindowThreadProcessId (cp->hwnd, NULL);
+ − 489 if (child_thread == GetCurrentThreadId ()
+ − 490 || !AttachThreadInput (GetCurrentThreadId (),
+ − 491 child_thread, TRUE))
+ − 492 child_thread = 0;
+ − 493
+ − 494 /* Set the foreground window to the child. */
+ − 495 if (SetForegroundWindow (cp->hwnd))
+ − 496 {
+ − 497 /* Generate keystrokes as if user had typed Ctrl-Break or
+ − 498 Ctrl-C. */
+ − 499 keybd_event (VK_CONTROL, control_scan_code, 0, 0);
+ − 500 keybd_event (vk_break_code, break_scan_code,
+ − 501 (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0);
+ − 502 keybd_event (vk_break_code, break_scan_code,
+ − 503 (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY)
+ − 504 | KEYEVENTF_KEYUP, 0);
+ − 505 keybd_event (VK_CONTROL, control_scan_code,
+ − 506 KEYEVENTF_KEYUP, 0);
+ − 507
+ − 508 /* Sleep for a bit to give time for Emacs frame to respond
+ − 509 to focus change events (if Emacs was active app). */
+ − 510 Sleep (100);
+ − 511
+ − 512 SetForegroundWindow (foreground_window);
+ − 513 }
+ − 514 /* Detach from the foreground and child threads now that
+ − 515 the foreground switching is over. */
+ − 516 if (foreground_thread)
+ − 517 AttachThreadInput (GetCurrentThreadId (),
+ − 518 foreground_thread, FALSE);
+ − 519 if (child_thread)
+ − 520 AttachThreadInput (GetCurrentThreadId (),
+ − 521 child_thread, FALSE);
+ − 522 }
+ − 523 }
+ − 524 /* Ctrl-Break is NT equivalent of SIGINT. */
+ − 525 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
+ − 526 {
+ − 527 #if 0 /* FSF Emacs */
+ − 528 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
+ − 529 "for pid %lu\n", GetLastError (), pid));
+ − 530 errno = EINVAL;
+ − 531 #endif
+ − 532 rc = 0;
+ − 533 }
+ − 534 }
+ − 535 else
+ − 536 {
+ − 537 if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
+ − 538 {
+ − 539 #if 1
+ − 540 if (mswindows_windows9x_p ())
+ − 541 {
+ − 542 /*
+ − 543 Another possibility is to try terminating the VDM out-right by
+ − 544 calling the Shell VxD (id 0x17) V86 interface, function #4
+ − 545 "SHELL_Destroy_VM", ie.
+ − 546
+ − 547 mov edx,4
+ − 548 mov ebx,vm_handle
+ − 549 call shellapi
+ − 550
+ − 551 First need to determine the current VM handle, and then arrange for
+ − 552 the shellapi call to be made from the system vm (by using
+ − 553 Switch_VM_and_callback).
+ − 554
+ − 555 Could try to invoke DestroyVM through CallVxD.
+ − 556
+ − 557 */
+ − 558 #if 0
+ − 559 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
+ − 560 to hang when cmdproxy is used in conjunction with
+ − 561 command.com for an interactive shell. Posting
+ − 562 WM_CLOSE pops up a dialog that, when Yes is selected,
+ − 563 does the same thing. TerminateProcess is also less
+ − 564 than ideal in that subprocesses tend to stick around
+ − 565 until the machine is shutdown, but at least it
+ − 566 doesn't freeze the 16-bit subsystem. */
+ − 567 PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
+ − 568 #endif
+ − 569 if (!TerminateProcess (h_process, 0xff))
+ − 570 {
+ − 571 #if 0 /* FSF Emacs */
+ − 572 DebPrint (("sys_kill.TerminateProcess returned %d "
+ − 573 "for pid %lu\n", GetLastError (), pid));
+ − 574 errno = EINVAL;
+ − 575 #endif
+ − 576 rc = 0;
+ − 577 }
+ − 578 }
+ − 579 else
+ − 580 #endif
+ − 581 PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
+ − 582 }
+ − 583 /* Kill the process. On W32 this doesn't kill child processes
+ − 584 so it doesn't work very well for shells which is why it's not
+ − 585 used in every case. */
+ − 586 else if (!TerminateProcess (h_process, 0xff))
+ − 587 {
+ − 588 #if 0 /* FSF Emacs */
+ − 589 DebPrint (("sys_kill.TerminateProcess returned %d "
+ − 590 "for pid %lu\n", GetLastError (), pid));
+ − 591 errno = EINVAL;
+ − 592 #endif
+ − 593 rc = 0;
+ − 594 }
+ − 595 }
+ − 596
+ − 597 if (close_process)
+ − 598 CloseHandle (h_process);
+ − 599
+ − 600 return rc;
+ − 601 }
+ − 602
+ − 603 /* -------------------------- all-OS functions ---------------------------- */
+ − 604
+ − 605 static int
+ − 606 send_signal (struct nt_process_data *cp, int pid, int signo)
+ − 607 {
+ − 608 return (!mswindows_windows9x_p () && send_signal_the_nt_way (cp, pid, signo))
+ − 609 || send_signal_the_95_way (cp, pid, signo);
+ − 610 }
+ − 611
428
+ − 612 /*
+ − 613 * Signal error if SIGNO is not supported
+ − 614 */
+ − 615 static void
+ − 616 validate_signal_number (int signo)
+ − 617 {
+ − 618 if (signo != SIGKILL && signo != SIGTERM
+ − 619 && signo != SIGQUIT && signo != SIGINT
+ − 620 && signo != SIGHUP)
563
+ − 621 invalid_constant ("Signal number not supported", make_int (signo));
428
+ − 622 }
+ − 623
+ − 624 /*-----------------------------------------------------------------------*/
+ − 625 /* Process methods */
+ − 626 /*-----------------------------------------------------------------------*/
+ − 627
+ − 628 /*
+ − 629 * Allocate and initialize Lisp_Process->process_data
+ − 630 */
+ − 631
+ − 632 static void
440
+ − 633 nt_alloc_process_data (Lisp_Process *p)
428
+ − 634 {
+ − 635 p->process_data = xnew_and_zero (struct nt_process_data);
+ − 636 }
+ − 637
+ − 638 static void
440
+ − 639 nt_finalize_process_data (Lisp_Process *p, int for_disksave)
428
+ − 640 {
+ − 641 assert (!for_disksave);
442
+ − 642 if (NT_DATA (p)->h_process)
+ − 643 CloseHandle (NT_DATA (p)->h_process);
428
+ − 644 }
+ − 645
+ − 646 /*
+ − 647 * Initialize XEmacs process implementation once
+ − 648 */
+ − 649 static void
+ − 650 nt_init_process (void)
+ − 651 {
+ − 652 /* Initialize winsock */
+ − 653 WSADATA wsa_data;
+ − 654 /* Request Winsock v1.1 Note the order: (minor=1, major=1) */
+ − 655 WSAStartup (MAKEWORD (1,1), &wsa_data);
+ − 656 }
+ − 657
563
+ − 658 DOESNT_RETURN
+ − 659 mswindows_report_process_error (const char *string, Lisp_Object data,
+ − 660 int errnum)
+ − 661 {
+ − 662 report_file_type_error (Qprocess_error, mswindows_lisp_error (errnum),
+ − 663 string, data);
+ − 664 }
428
+ − 665
563
+ − 666 static DOESNT_RETURN
+ − 667 mswindows_report_winsock_error (const char *string, Lisp_Object data,
+ − 668 int errnum)
428
+ − 669 {
563
+ − 670 report_file_type_error (Qnetwork_error, mswindows_lisp_error (errnum),
+ − 671 string, data);
442
+ − 672 }
+ − 673
+ − 674 static void
+ − 675 ensure_console_window_exists (void)
+ − 676 {
+ − 677 if (mswindows_windows9x_p ())
+ − 678 mswindows_hide_console ();
+ − 679 }
+ − 680
+ − 681 int
+ − 682 compare_env (const void *strp1, const void *strp2)
+ − 683 {
+ − 684 const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
+ − 685
+ − 686 while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
+ − 687 {
+ − 688 if ((*str1) > (*str2))
+ − 689 return 1;
+ − 690 else if ((*str1) < (*str2))
+ − 691 return -1;
+ − 692 str1++, str2++;
+ − 693 }
+ − 694
+ − 695 if (*str1 == '=' && *str2 == '=')
+ − 696 return 0;
+ − 697 else if (*str1 == '=')
+ − 698 return -1;
+ − 699 else
+ − 700 return 1;
428
+ − 701 }
+ − 702
563
+ − 703 /*
+ − 704 * Fork off a subprocess. P is a pointer to newly created subprocess
+ − 705 * object. If this function signals, the caller is responsible for
+ − 706 * deleting (and finalizing) the process object.
+ − 707 *
+ − 708 * The method must return PID of the new process, a (positive??? ####) number
+ − 709 * which fits into Lisp_Int. No return value indicates an error, the method
+ − 710 * must signal an error instead.
+ − 711 */
+ − 712
428
+ − 713 static int
440
+ − 714 nt_create_process (Lisp_Process *p,
428
+ − 715 Lisp_Object *argv, int nargv,
+ − 716 Lisp_Object program, Lisp_Object cur_dir)
+ − 717 {
442
+ − 718 /* Synched up with sys_spawnve in FSF 20.6. Significantly different
+ − 719 but still synchable. */
430
+ − 720 HANDLE hmyshove, hmyslurp, hprocin, hprocout, hprocerr;
442
+ − 721 Extbyte *command_line;
428
+ − 722 BOOL do_io, windowed;
+ − 723 char *proc_env;
+ − 724
442
+ − 725 /* No need to DOS-ize the filename; expand-file-name (called prior)
+ − 726 already does this. */
+ − 727
428
+ − 728 /* Find out whether the application is windowed or not */
442
+ − 729 if (xSHGetFileInfoA)
+ − 730 {
+ − 731 /* SHGetFileInfo tends to return ERROR_FILE_NOT_FOUND on most
+ − 732 errors. This leads to bogus error message. */
+ − 733 DWORD image_type;
+ − 734 char *p = strrchr ((char *)XSTRING_DATA (program), '.');
+ − 735 if (p != NULL &&
+ − 736 (stricmp (p, ".exe") == 0 ||
+ − 737 stricmp (p, ".com") == 0 ||
+ − 738 stricmp (p, ".bat") == 0 ||
+ − 739 stricmp (p, ".cmd") == 0))
+ − 740 {
+ − 741 image_type = xSHGetFileInfoA ((char *)XSTRING_DATA (program), 0,NULL,
+ − 742 0, SHGFI_EXETYPE);
+ − 743 }
+ − 744 else
+ − 745 {
558
+ − 746 char progname[PATH_MAX];
442
+ − 747 sprintf (progname, "%s.exe", (char *)XSTRING_DATA (program));
+ − 748 image_type = xSHGetFileInfoA (progname, 0, NULL, 0, SHGFI_EXETYPE);
+ − 749 }
+ − 750 if (image_type == 0)
563
+ − 751 mswindows_report_process_error
+ − 752 ("Error starting",
+ − 753 program,
+ − 754 GetLastError () == ERROR_FILE_NOT_FOUND
+ − 755 ? ERROR_BAD_FORMAT : GetLastError ());
442
+ − 756 windowed = HIWORD (image_type) != 0;
+ − 757 }
+ − 758 else /* NT 3.5; we have no idea so just guess. */
+ − 759 windowed = 0;
428
+ − 760
+ − 761 /* Decide whether to do I/O on process handles, or just mark the
+ − 762 process exited immediately upon successful launching. We do I/O if the
+ − 763 process is a console one, or if it is windowed but windowed_process_io
+ − 764 is non-zero */
+ − 765 do_io = !windowed || windowed_process_io ;
+ − 766
+ − 767 if (do_io)
+ − 768 {
+ − 769 /* Create two unidirectional named pipes */
+ − 770 HANDLE htmp;
+ − 771 SECURITY_ATTRIBUTES sa;
+ − 772
+ − 773 sa.nLength = sizeof(sa);
+ − 774 sa.bInheritHandle = TRUE;
+ − 775 sa.lpSecurityDescriptor = NULL;
+ − 776
+ − 777 CreatePipe (&hprocin, &hmyshove, &sa, 0);
+ − 778 CreatePipe (&hmyslurp, &hprocout, &sa, 0);
+ − 779
430
+ − 780 /* Duplicate the stdout handle for use as stderr */
442
+ − 781 DuplicateHandle(GetCurrentProcess(), hprocout, GetCurrentProcess(),
+ − 782 &hprocerr, 0, TRUE, DUPLICATE_SAME_ACCESS);
430
+ − 783
428
+ − 784 /* Stupid Win32 allows to create a pipe with *both* ends either
+ − 785 inheritable or not. We need process ends inheritable, and local
+ − 786 ends not inheritable. */
442
+ − 787 DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(),
+ − 788 &htmp, 0, FALSE,
+ − 789 DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
428
+ − 790 hmyshove = htmp;
442
+ − 791 DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(),
+ − 792 &htmp, 0, FALSE,
+ − 793 DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
428
+ − 794 hmyslurp = htmp;
+ − 795 }
+ − 796
+ − 797 /* Convert an argv vector into Win32 style command line by a call to
442
+ − 798 lisp function `mswindows-construct-process-command-line'
+ − 799 (in win32-native.el) */
428
+ − 800 {
+ − 801 int i;
+ − 802 Lisp_Object args_or_ret = Qnil;
+ − 803 struct gcpro gcpro1;
+ − 804
+ − 805 GCPRO1 (args_or_ret);
+ − 806
+ − 807 for (i = 0; i < nargv; ++i)
+ − 808 args_or_ret = Fcons (*argv++, args_or_ret);
+ − 809 args_or_ret = Fnreverse (args_or_ret);
+ − 810 args_or_ret = Fcons (program, args_or_ret);
+ − 811
442
+ − 812 args_or_ret = call1 (Qmswindows_construct_process_command_line,
+ − 813 args_or_ret);
428
+ − 814
+ − 815 if (!STRINGP (args_or_ret))
+ − 816 /* Luser wrote his/her own clever version */
442
+ − 817 invalid_argument
+ − 818 ("Bogus return value from `mswindows-construct-process-command-line'",
+ − 819 args_or_ret);
428
+ − 820
442
+ − 821 LISP_STRING_TO_EXTERNAL (args_or_ret, command_line, Qmswindows_tstr);
428
+ − 822
+ − 823 UNGCPRO; /* args_or_ret */
+ − 824 }
+ − 825
+ − 826 /* Set `proc_env' to a nul-separated array of the strings in
+ − 827 Vprocess_environment terminated by 2 nuls. */
+ − 828
+ − 829 {
+ − 830 char **env;
+ − 831 REGISTER Lisp_Object tem;
+ − 832 REGISTER char **new_env;
+ − 833 REGISTER int new_length = 0, i, new_space;
+ − 834 char *penv;
+ − 835
+ − 836 for (tem = Vprocess_environment;
+ − 837 (CONSP (tem)
+ − 838 && STRINGP (XCAR (tem)));
+ − 839 tem = XCDR (tem))
+ − 840 new_length++;
442
+ − 841
+ − 842 /* FSF adds an extra env var to hold the current process ID of the
+ − 843 Emacs process. Apparently this is used only by emacsserver.c,
+ − 844 which we have superseded to gnuserv.c. (#### Does it work under
+ − 845 MS Windows?)
+ − 846
+ − 847 sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d",
+ − 848 GetCurrentProcessId ());
+ − 849 arglen += strlen (ppid_env_var_buffer) + 1;
+ − 850 numenv++;
+ − 851 */
428
+ − 852
+ − 853 /* new_length + 1 to include terminating 0. */
+ − 854 env = new_env = alloca_array (char *, new_length + 1);
+ − 855
+ − 856 /* Copy the Vprocess_environment strings into new_env. */
+ − 857 for (tem = Vprocess_environment;
+ − 858 (CONSP (tem)
+ − 859 && STRINGP (XCAR (tem)));
+ − 860 tem = XCDR (tem))
+ − 861 {
+ − 862 char **ep = env;
+ − 863 char *string = (char *) XSTRING_DATA (XCAR (tem));
+ − 864 /* See if this string duplicates any string already in the env.
+ − 865 If so, don't put it in.
+ − 866 When an env var has multiple definitions,
+ − 867 we keep the definition that comes first in process-environment. */
+ − 868 for (; ep != new_env; ep++)
+ − 869 {
+ − 870 char *p = *ep, *q = string;
+ − 871 while (1)
+ − 872 {
+ − 873 if (*q == 0)
+ − 874 /* The string is malformed; might as well drop it. */
+ − 875 goto duplicate;
+ − 876 if (*q != *p)
+ − 877 break;
+ − 878 if (*q == '=')
+ − 879 goto duplicate;
+ − 880 p++, q++;
+ − 881 }
+ − 882 }
+ − 883 *new_env++ = string;
+ − 884 duplicate: ;
+ − 885 }
+ − 886 *new_env = 0;
+ − 887
+ − 888 /* Sort the environment variables */
+ − 889 new_length = new_env - env;
+ − 890 qsort (env, new_length, sizeof (char *), compare_env);
+ − 891
+ − 892 /* Work out how much space to allocate */
+ − 893 new_space = 0;
+ − 894 for (i = 0; i < new_length; i++)
+ − 895 {
+ − 896 new_space += strlen(env[i]) + 1;
+ − 897 }
+ − 898 new_space++;
+ − 899
+ − 900 /* Allocate space and copy variables into it */
442
+ − 901 penv = proc_env = (char*) alloca(new_space);
428
+ − 902 for (i = 0; i < new_length; i++)
+ − 903 {
+ − 904 strcpy(penv, env[i]);
+ − 905 penv += strlen(env[i]) + 1;
+ − 906 }
+ − 907 *penv = 0;
+ − 908 }
442
+ − 909
+ − 910 #if 0
+ − 911 /* #### we need to port this. */
+ − 912 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
+ − 913 application to start it by specifying the helper app as cmdname,
+ − 914 while leaving the real app name as argv[0]. */
+ − 915 if (is_dos_app)
+ − 916 {
+ − 917 cmdname = (char*) alloca (MAXPATHLEN);
+ − 918 if (egetenv ("CMDPROXY"))
+ − 919 strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
+ − 920 else
+ − 921 {
+ − 922 strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
+ − 923 strcat ((char*)cmdname, "cmdproxy.exe");
+ − 924 }
+ − 925 }
+ − 926 #endif
428
+ − 927
+ − 928 /* Create process */
+ − 929 {
+ − 930 STARTUPINFO si;
+ − 931 PROCESS_INFORMATION pi;
+ − 932 DWORD err;
442
+ − 933 DWORD flags;
428
+ − 934
+ − 935 xzero (si);
+ − 936 si.dwFlags = STARTF_USESHOWWINDOW;
+ − 937 si.wShowWindow = windowed ? SW_SHOWNORMAL : SW_HIDE;
+ − 938 if (do_io)
+ − 939 {
+ − 940 si.hStdInput = hprocin;
+ − 941 si.hStdOutput = hprocout;
430
+ − 942 si.hStdError = hprocerr;
428
+ − 943 si.dwFlags |= STARTF_USESTDHANDLES;
+ − 944 }
+ − 945
442
+ − 946 flags = CREATE_SUSPENDED;
+ − 947 if (mswindows_windows9x_p ())
+ − 948 flags |= (!NILP (Vmswindows_start_process_share_console)
+ − 949 ? CREATE_NEW_PROCESS_GROUP
+ − 950 : CREATE_NEW_CONSOLE);
+ − 951 else
+ − 952 flags |= CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP;
+ − 953 if (NILP (Vmswindows_start_process_inherit_error_mode))
+ − 954 flags |= CREATE_DEFAULT_ERROR_MODE;
+ − 955
+ − 956 ensure_console_window_exists ();
+ − 957
+ − 958 err = (CreateProcess (NULL, command_line, NULL, NULL, TRUE, flags,
428
+ − 959 proc_env, (char *) XSTRING_DATA (cur_dir), &si, &pi)
+ − 960 ? 0 : GetLastError ());
+ − 961
+ − 962 if (do_io)
+ − 963 {
+ − 964 /* These just have been inherited; we do not need a copy */
+ − 965 CloseHandle (hprocin);
+ − 966 CloseHandle (hprocout);
430
+ − 967 CloseHandle (hprocerr);
428
+ − 968 }
+ − 969
+ − 970 /* Handle process creation failure */
+ − 971 if (err)
+ − 972 {
+ − 973 if (do_io)
+ − 974 {
+ − 975 CloseHandle (hmyshove);
+ − 976 CloseHandle (hmyslurp);
+ − 977 }
563
+ − 978 mswindows_report_process_error
+ − 979 ("Error starting",
+ − 980 program, GetLastError ());
428
+ − 981 }
+ − 982
+ − 983 /* The process started successfully */
+ − 984 if (do_io)
+ − 985 {
+ − 986 NT_DATA(p)->h_process = pi.hProcess;
442
+ − 987 NT_DATA(p)->dwProcessId = pi.dwProcessId;
428
+ − 988 init_process_io_handles (p, (void*)hmyslurp, (void*)hmyshove, 0);
+ − 989 }
+ − 990 else
+ − 991 {
+ − 992 /* Indicate as if the process has exited immediately. */
+ − 993 p->status_symbol = Qexit;
+ − 994 CloseHandle (pi.hProcess);
+ − 995 }
+ − 996
442
+ − 997 if (!windowed)
+ − 998 enable_child_signals (pi.hProcess);
+ − 999
428
+ − 1000 ResumeThread (pi.hThread);
+ − 1001 CloseHandle (pi.hThread);
+ − 1002
432
+ − 1003 return ((int)pi.dwProcessId);
428
+ − 1004 }
+ − 1005 }
+ − 1006
+ − 1007 /*
+ − 1008 * This method is called to update status fields of the process
+ − 1009 * structure. If the process has not existed, this method is expected
+ − 1010 * to do nothing.
+ − 1011 *
+ − 1012 * The method is called only for real child processes.
+ − 1013 */
+ − 1014
+ − 1015 static void
440
+ − 1016 nt_update_status_if_terminated (Lisp_Process* p)
428
+ − 1017 {
+ − 1018 DWORD exit_code;
+ − 1019 if (GetExitCodeProcess (NT_DATA(p)->h_process, &exit_code)
+ − 1020 && exit_code != STILL_ACTIVE)
+ − 1021 {
+ − 1022 p->tick++;
+ − 1023 p->core_dumped = 0;
+ − 1024 /* The exit code can be a code returned by process, or an
+ − 1025 NTSTATUS value. We cannot accurately handle the latter since
+ − 1026 it is a full 32 bit integer */
+ − 1027 if (exit_code & 0xC0000000)
+ − 1028 {
+ − 1029 p->status_symbol = Qsignal;
+ − 1030 p->exit_code = exit_code & 0x1FFFFFFF;
+ − 1031 }
+ − 1032 else
+ − 1033 {
+ − 1034 p->status_symbol = Qexit;
+ − 1035 p->exit_code = exit_code;
+ − 1036 }
+ − 1037 }
+ − 1038 }
+ − 1039
+ − 1040 /*
+ − 1041 * Stuff the entire contents of LSTREAM to the process output pipe
+ − 1042 */
+ − 1043
+ − 1044 /* #### If only this function could be somehow merged with
+ − 1045 unix_send_process... */
+ − 1046
+ − 1047 static void
+ − 1048 nt_send_process (Lisp_Object proc, struct lstream* lstream)
+ − 1049 {
432
+ − 1050 volatile Lisp_Object vol_proc = proc;
440
+ − 1051 Lisp_Process *volatile p = XPROCESS (proc);
428
+ − 1052
+ − 1053 /* use a reasonable-sized buffer (somewhere around the size of the
+ − 1054 stream buffer) so as to avoid inundating the stream with blocked
+ − 1055 data. */
442
+ − 1056 Bufbyte chunkbuf[512];
428
+ − 1057 Bytecount chunklen;
+ − 1058
+ − 1059 while (1)
+ − 1060 {
462
+ − 1061 Lstream_data_count writeret;
428
+ − 1062
442
+ − 1063 chunklen = Lstream_read (lstream, chunkbuf, 512);
428
+ − 1064 if (chunklen <= 0)
+ − 1065 break; /* perhaps should abort() if < 0?
+ − 1066 This should never happen. */
+ − 1067
+ − 1068 /* Lstream_write() will never successfully write less than the
+ − 1069 amount sent in. In the worst case, it just buffers the
+ − 1070 unwritten data. */
+ − 1071 writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM(p)), chunkbuf,
+ − 1072 chunklen);
+ − 1073 Lstream_flush (XLSTREAM (DATA_OUTSTREAM(p)));
+ − 1074 if (writeret < 0)
+ − 1075 {
+ − 1076 p->status_symbol = Qexit;
+ − 1077 p->exit_code = ERROR_BROKEN_PIPE;
+ − 1078 p->core_dumped = 0;
+ − 1079 p->tick++;
+ − 1080 process_tick++;
432
+ − 1081 deactivate_process (*((Lisp_Object *) (&vol_proc)));
442
+ − 1082 invalid_operation ("Broken pipe error sending to process; closed it",
+ − 1083 p->name);
428
+ − 1084 }
+ − 1085
+ − 1086 {
+ − 1087 int wait_ms = 25;
+ − 1088 while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
+ − 1089 {
+ − 1090 /* Buffer is full. Wait, accepting input; that may allow
+ − 1091 the program to finish doing output and read more. */
+ − 1092 Faccept_process_output (Qnil, Qzero, make_int (wait_ms));
+ − 1093 Lstream_flush (XLSTREAM (p->pipe_outstream));
+ − 1094 wait_ms = min (1000, 2 * wait_ms);
+ − 1095 }
+ − 1096 }
+ − 1097 }
+ − 1098 }
+ − 1099
+ − 1100 /*
+ − 1101 * Send a signal number SIGNO to PROCESS.
+ − 1102 * CURRENT_GROUP means send to the process group that currently owns
+ − 1103 * the terminal being used to communicate with PROCESS.
+ − 1104 * This is used for various commands in shell mode.
+ − 1105 * If NOMSG is zero, insert signal-announcements into process's buffers
+ − 1106 * right away.
+ − 1107 *
+ − 1108 * If we can, we try to signal PROCESS by sending control characters
+ − 1109 * down the pty. This allows us to signal inferiors who have changed
+ − 1110 * their uid, for which killpg would return an EPERM error.
+ − 1111 *
+ − 1112 * The method signals an error if the given SIGNO is not valid
+ − 1113 */
+ − 1114
+ − 1115 static void
+ − 1116 nt_kill_child_process (Lisp_Object proc, int signo,
+ − 1117 int current_group, int nomsg)
+ − 1118 {
440
+ − 1119 Lisp_Process *p = XPROCESS (proc);
428
+ − 1120
+ − 1121 /* Signal error if SIGNO cannot be sent */
+ − 1122 validate_signal_number (signo);
+ − 1123
+ − 1124 /* Send signal */
442
+ − 1125 if (!send_signal (NT_DATA (p), 0, signo))
+ − 1126 invalid_operation ("Cannot send signal to process", proc);
428
+ − 1127 }
+ − 1128
+ − 1129 /*
442
+ − 1130 * Kill any process in the system given its PID
428
+ − 1131 *
+ − 1132 * Returns zero if a signal successfully sent, or
+ − 1133 * negative number upon failure
+ − 1134 */
+ − 1135 static int
+ − 1136 nt_kill_process_by_pid (int pid, int signo)
+ − 1137 {
442
+ − 1138 struct Lisp_Process *p;
+ − 1139
428
+ − 1140 /* Signal error if SIGNO cannot be sent */
+ − 1141 validate_signal_number (signo);
+ − 1142
442
+ − 1143 p = find_process_from_pid (pid);
+ − 1144 return send_signal (p ? NT_DATA (p) : 0, pid, signo) ? 0 : -1;
428
+ − 1145 }
+ − 1146
+ − 1147 /*-----------------------------------------------------------------------*/
+ − 1148 /* Sockets connections */
+ − 1149 /*-----------------------------------------------------------------------*/
+ − 1150 #ifdef HAVE_SOCKETS
+ − 1151
+ − 1152 /* #### Hey MS, how long Winsock 2 for '95 will be in beta? */
+ − 1153
+ − 1154 #define SOCK_TIMER_ID 666
+ − 1155 #define XM_SOCKREPLY (WM_USER + 666)
+ − 1156
563
+ − 1157 /* Return 0 for success, or error code */
+ − 1158
428
+ − 1159 static int
563
+ − 1160 get_internet_address (Lisp_Object host, struct sockaddr_in *address)
428
+ − 1161 {
+ − 1162 char buf [MAXGETHOSTSTRUCT];
+ − 1163 HWND hwnd;
+ − 1164 HANDLE hasync;
563
+ − 1165 int errcode = 0;
428
+ − 1166
+ − 1167 address->sin_family = AF_INET;
+ − 1168
+ − 1169 /* First check if HOST is already a numeric address */
+ − 1170 {
+ − 1171 unsigned long inaddr = inet_addr (XSTRING_DATA (host));
+ − 1172 if (inaddr != INADDR_NONE)
+ − 1173 {
+ − 1174 address->sin_addr.s_addr = inaddr;
563
+ − 1175 return 0;
428
+ − 1176 }
+ − 1177 }
+ − 1178
+ − 1179 /* Create a window which will receive completion messages */
+ − 1180 hwnd = CreateWindow ("STATIC", NULL, WS_OVERLAPPED, 0, 0, 1, 1,
+ − 1181 NULL, NULL, NULL, NULL);
+ − 1182 assert (hwnd);
+ − 1183
+ − 1184 /* Post name resolution request */
+ − 1185 hasync = WSAAsyncGetHostByName (hwnd, XM_SOCKREPLY, XSTRING_DATA (host),
+ − 1186 buf, sizeof (buf));
+ − 1187 if (hasync == NULL)
563
+ − 1188 {
+ − 1189 errcode = WSAGetLastError ();
+ − 1190 goto done;
+ − 1191 }
428
+ − 1192
+ − 1193 /* Set a timer to poll for quit every 250 ms */
+ − 1194 SetTimer (hwnd, SOCK_TIMER_ID, 250, NULL);
+ − 1195
+ − 1196 while (1)
+ − 1197 {
+ − 1198 MSG msg;
+ − 1199 GetMessage (&msg, hwnd, 0, 0);
+ − 1200 if (msg.message == XM_SOCKREPLY)
+ − 1201 {
+ − 1202 /* Ok, got an answer */
563
+ − 1203 errcode = WSAGETASYNCERROR (msg.lParam);
428
+ − 1204 goto done;
+ − 1205 }
+ − 1206 else if (msg.message == WM_TIMER && msg.wParam == SOCK_TIMER_ID)
+ − 1207 {
+ − 1208 if (QUITP)
+ − 1209 {
+ − 1210 WSACancelAsyncRequest (hasync);
+ − 1211 KillTimer (hwnd, SOCK_TIMER_ID);
+ − 1212 DestroyWindow (hwnd);
+ − 1213 REALLY_QUIT;
+ − 1214 }
+ − 1215 }
+ − 1216 DispatchMessage (&msg);
+ − 1217 }
+ − 1218
+ − 1219 done:
+ − 1220 KillTimer (hwnd, SOCK_TIMER_ID);
+ − 1221 DestroyWindow (hwnd);
563
+ − 1222 if (!errcode)
428
+ − 1223 {
+ − 1224 /* BUF starts with struct hostent */
+ − 1225 struct hostent* he = (struct hostent*) buf;
+ − 1226 address->sin_addr.s_addr = *(unsigned long*)he->h_addr_list[0];
+ − 1227 }
563
+ − 1228 return errcode;
428
+ − 1229 }
+ − 1230
+ − 1231 static Lisp_Object
+ − 1232 nt_canonicalize_host_name (Lisp_Object host)
+ − 1233 {
+ − 1234 struct sockaddr_in address;
+ − 1235
563
+ − 1236 if (get_internet_address (host, &address)) /* error */
428
+ − 1237 return host;
+ − 1238
+ − 1239 if (address.sin_family == AF_INET)
+ − 1240 return build_string (inet_ntoa (address.sin_addr));
+ − 1241 else
+ − 1242 return host;
+ − 1243 }
+ − 1244
+ − 1245 /* open a TCP network connection to a given HOST/SERVICE. Treated
+ − 1246 exactly like a normal process when reading and writing. Only
+ − 1247 differences are in status display and process deletion. A network
+ − 1248 connection has no PID; you cannot signal it. All you can do is
+ − 1249 deactivate and close it via delete-process */
+ − 1250
+ − 1251 static void
442
+ − 1252 nt_open_network_stream (Lisp_Object name, Lisp_Object host,
+ − 1253 Lisp_Object service,
428
+ − 1254 Lisp_Object protocol, void** vinfd, void** voutfd)
+ − 1255 {
442
+ − 1256 /* !!#### not Mule-ized */
428
+ − 1257 struct sockaddr_in address;
+ − 1258 SOCKET s;
+ − 1259 int port;
+ − 1260 int retval;
563
+ − 1261 int errnum;
428
+ − 1262
+ − 1263 CHECK_STRING (host);
+ − 1264
+ − 1265 if (!EQ (protocol, Qtcp))
563
+ − 1266 invalid_constant ("Unsupported protocol", protocol);
428
+ − 1267
+ − 1268 if (INTP (service))
+ − 1269 port = htons ((unsigned short) XINT (service));
+ − 1270 else
+ − 1271 {
+ − 1272 struct servent *svc_info;
+ − 1273 CHECK_STRING (service);
+ − 1274 svc_info = getservbyname ((char *) XSTRING_DATA (service), "tcp");
+ − 1275 if (svc_info == 0)
442
+ − 1276 invalid_argument ("Unknown service", service);
428
+ − 1277 port = svc_info->s_port;
+ − 1278 }
+ − 1279
563
+ − 1280 retval = get_internet_address (host, &address);
+ − 1281 if (retval)
+ − 1282 mswindows_report_winsock_error ("Getting IP address", host,
+ − 1283 retval);
428
+ − 1284 address.sin_port = port;
+ − 1285
+ − 1286 s = socket (address.sin_family, SOCK_STREAM, 0);
+ − 1287 if (s < 0)
563
+ − 1288 mswindows_report_winsock_error ("Creating socket", name,
+ − 1289 WSAGetLastError ());
428
+ − 1290
+ − 1291 /* We don't want to be blocked on connect */
+ − 1292 {
+ − 1293 unsigned long nonblock = 1;
+ − 1294 ioctlsocket (s, FIONBIO, &nonblock);
+ − 1295 }
+ − 1296
+ − 1297 retval = connect (s, (struct sockaddr *) &address, sizeof (address));
+ − 1298 if (retval != NO_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
563
+ − 1299 {
+ − 1300 errnum = WSAGetLastError ();
+ − 1301 goto connect_failed;
+ − 1302 }
+ − 1303
+ − 1304 #if 0 /* PUTA! I thought getsockopt() was failing, so I created the
+ − 1305 following based on the code in get_internet_address(), but
+ − 1306 it was my own fault down below. Both versions should work. */
428
+ − 1307 /* Wait while connection is established */
563
+ − 1308 {
+ − 1309 HWND hwnd;
+ − 1310
+ − 1311 /* Create a window which will receive completion messages */
+ − 1312 hwnd = CreateWindow ("STATIC", NULL, WS_OVERLAPPED, 0, 0, 1, 1,
+ − 1313 NULL, NULL, NULL, NULL);
+ − 1314 assert (hwnd);
+ − 1315
+ − 1316 /* Post request */
+ − 1317 if (WSAAsyncSelect (s, hwnd, XM_SOCKREPLY, FD_CONNECT))
+ − 1318 {
+ − 1319 errnum = WSAGetLastError ();
+ − 1320 goto done;
+ − 1321 }
+ − 1322
+ − 1323 /* Set a timer to poll for quit every 250 ms */
+ − 1324 SetTimer (hwnd, SOCK_TIMER_ID, 250, NULL);
+ − 1325
+ − 1326 while (1)
+ − 1327 {
+ − 1328 MSG msg;
+ − 1329 GetMessage (&msg, hwnd, 0, 0);
+ − 1330 if (msg.message == XM_SOCKREPLY)
+ − 1331 {
+ − 1332 /* Ok, got an answer */
+ − 1333 errnum = WSAGETASYNCERROR (msg.lParam);
+ − 1334 goto done;
+ − 1335 }
+ − 1336
+ − 1337 else if (msg.message == WM_TIMER && msg.wParam == SOCK_TIMER_ID)
+ − 1338 {
+ − 1339 if (QUITP)
+ − 1340 {
+ − 1341 WSAAsyncSelect (s, hwnd, XM_SOCKREPLY, 0);
+ − 1342 KillTimer (hwnd, SOCK_TIMER_ID);
+ − 1343 DestroyWindow (hwnd);
+ − 1344 REALLY_QUIT;
+ − 1345 }
+ − 1346 }
+ − 1347 DispatchMessage (&msg);
+ − 1348 }
+ − 1349
+ − 1350 done:
+ − 1351 WSAAsyncSelect (s, hwnd, XM_SOCKREPLY, 0);
+ − 1352 KillTimer (hwnd, SOCK_TIMER_ID);
+ − 1353 DestroyWindow (hwnd);
+ − 1354 if (errnum)
+ − 1355 goto connect_failed;
+ − 1356 }
+ − 1357
+ − 1358 #else
428
+ − 1359 while (1)
+ − 1360 {
563
+ − 1361 fd_set fdwriteset, fdexceptset;
428
+ − 1362 struct timeval tv;
+ − 1363 int nsel;
+ − 1364
+ − 1365 if (QUITP)
+ − 1366 {
+ − 1367 closesocket (s);
+ − 1368 REALLY_QUIT;
+ − 1369 }
+ − 1370
+ − 1371 /* Poll for quit every 250 ms */
+ − 1372 tv.tv_sec = 0;
+ − 1373 tv.tv_usec = 250 * 1000;
+ − 1374
563
+ − 1375 FD_ZERO (&fdwriteset);
+ − 1376 FD_SET (s, &fdwriteset);
+ − 1377 FD_ZERO (&fdexceptset);
+ − 1378 FD_SET (s, &fdexceptset);
+ − 1379 nsel = select (0, NULL, &fdwriteset, &fdexceptset, &tv);
+ − 1380
+ − 1381 if (nsel == SOCKET_ERROR)
+ − 1382 {
+ − 1383 errnum = WSAGetLastError ();
+ − 1384 goto connect_failed;
+ − 1385 }
428
+ − 1386
+ − 1387 if (nsel > 0)
+ − 1388 {
+ − 1389 /* Check: was connection successful or not? */
563
+ − 1390 if (FD_ISSET (s, &fdwriteset))
+ − 1391 break;
+ − 1392 else if (FD_ISSET (s, &fdexceptset))
+ − 1393 {
+ − 1394 int store_me_harder = sizeof (errnum);
+ − 1395 /* OK, we finally can get the REAL error code. Any paths
+ − 1396 in this code that lead to a call of WSAGetLastError()
+ − 1397 indicate probable logic failure. */
+ − 1398 if (getsockopt (s, SOL_SOCKET, SO_ERROR, (char *) &errnum,
+ − 1399 &store_me_harder))
+ − 1400 errnum = WSAGetLastError ();
+ − 1401 goto connect_failed;
+ − 1402 }
428
+ − 1403 else
563
+ − 1404 {
+ − 1405 signal_error (Qinternal_error,
+ − 1406 "Porra, esse caralho de um sistema de operacao",
+ − 1407 Qunbound);
+ − 1408 break;
+ − 1409 }
428
+ − 1410 }
+ − 1411 }
563
+ − 1412 #endif
428
+ − 1413
+ − 1414 /* We are connected at this point */
+ − 1415 *vinfd = (void*)s;
+ − 1416 DuplicateHandle (GetCurrentProcess(), (HANDLE)s,
+ − 1417 GetCurrentProcess(), (LPHANDLE)voutfd,
+ − 1418 0, FALSE, DUPLICATE_SAME_ACCESS);
+ − 1419 return;
+ − 1420
563
+ − 1421 connect_failed:
+ − 1422 {
+ − 1423 closesocket (s);
+ − 1424 mswindows_report_winsock_error ("Connection failed",
+ − 1425 list3 (Qunbound, host, service),
+ − 1426 errnum);
+ − 1427 }
428
+ − 1428 }
+ − 1429
+ − 1430 #endif
+ − 1431
+ − 1432 /*-----------------------------------------------------------------------*/
+ − 1433 /* Initialization */
+ − 1434 /*-----------------------------------------------------------------------*/
+ − 1435
+ − 1436 void
+ − 1437 process_type_create_nt (void)
+ − 1438 {
+ − 1439 PROCESS_HAS_METHOD (nt, alloc_process_data);
+ − 1440 PROCESS_HAS_METHOD (nt, finalize_process_data);
+ − 1441 PROCESS_HAS_METHOD (nt, init_process);
+ − 1442 PROCESS_HAS_METHOD (nt, create_process);
+ − 1443 PROCESS_HAS_METHOD (nt, update_status_if_terminated);
+ − 1444 PROCESS_HAS_METHOD (nt, send_process);
+ − 1445 PROCESS_HAS_METHOD (nt, kill_child_process);
+ − 1446 PROCESS_HAS_METHOD (nt, kill_process_by_pid);
+ − 1447 #ifdef HAVE_SOCKETS
+ − 1448 PROCESS_HAS_METHOD (nt, canonicalize_host_name);
+ − 1449 PROCESS_HAS_METHOD (nt, open_network_stream);
+ − 1450 #ifdef HAVE_MULTICAST
+ − 1451 #error I won't do this until '95 has winsock2
+ − 1452 PROCESS_HAS_METHOD (nt, open_multicast_group);
+ − 1453 #endif
+ − 1454 #endif
+ − 1455 }
+ − 1456
+ − 1457 void
+ − 1458 syms_of_process_nt (void)
+ − 1459 {
442
+ − 1460 DEFSYMBOL (Qmswindows_construct_process_command_line);
428
+ − 1461 }
+ − 1462
+ − 1463 void
+ − 1464 vars_of_process_nt (void)
+ − 1465 {
442
+ − 1466 DEFVAR_LISP ("mswindows-start-process-share-console",
+ − 1467 &Vmswindows_start_process_share_console /*
+ − 1468 When nil, new child processes are given a new console.
+ − 1469 When non-nil, they share the Emacs console; this has the limitation of
+ − 1470 allowing only only DOS subprocess to run at a time (whether started directly
+ − 1471 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
+ − 1472 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
+ − 1473 otherwise respond to interrupts from Emacs.
+ − 1474 */ );
+ − 1475 Vmswindows_start_process_share_console = Qnil;
+ − 1476
+ − 1477 DEFVAR_LISP ("mswindows-start-process-inherit-error-mode",
+ − 1478 &Vmswindows_start_process_inherit_error_mode /*
+ − 1479 "When nil, new child processes revert to the default error mode.
+ − 1480 When non-nil, they inherit their error mode setting from Emacs, which stops
+ − 1481 them blocking when trying to access unmounted drives etc.
+ − 1482 */ );
+ − 1483 Vmswindows_start_process_inherit_error_mode = Qt;
428
+ − 1484 }
