--- /dev/null
+/* Asynchronous subprocess implementation for Win32
+ Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
+ Free Software Foundation, Inc.
+ Copyright (C) 1995 Sun Microsystems, Inc.
+ Copyright (C) 1995, 1996, 2000 Ben Wing.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Written by Kirill M. Katsnelson <kkm@kis.ru>, April 1998 */
+
+#include <config.h>
+#include "lisp.h"
+
+#include "buffer.h"
+#include "console-msw.h"
+#include "hash.h"
+#include "lstream.h"
+#include "nt.h"
+#include "process.h"
+#include "procimpl.h"
+#include "sysdep.h"
+
+#include <shellapi.h>
+#include <errno.h>
+#include <signal.h>
+#ifdef HAVE_SOCKETS
+#include <winsock.h>
+#endif
+
+/* Bound by win32-native.el */
+Lisp_Object Qmswindows_construct_process_command_line;
+
+/* Arbitrary size limit for code fragments passed to run_in_other_process */
+#define FRAGMENT_CODE_SIZE 32
+
+/* Implementation-specific data. Pointed to by Lisp_Process->process_data */
+struct nt_process_data
+{
+ HANDLE h_process;
+ DWORD dwProcessId;
+ HWND hwnd; /* console window */
+};
+
+/* Control whether create_child causes the process to inherit Emacs'
+ console window, or be given a new one of its own. The default is
+ nil, to allow multiple DOS programs to run on Win95. Having separate
+ consoles also allows Emacs to cleanly terminate process groups. */
+Lisp_Object Vmswindows_start_process_share_console;
+
+/* Control whether create_child cause the process to inherit Emacs'
+ error mode setting. The default is t, to minimize the possibility of
+ subprocesses blocking when accessing unmounted drives. */
+Lisp_Object Vmswindows_start_process_inherit_error_mode;
+
+#define NT_DATA(p) ((struct nt_process_data*)((p)->process_data))
+\f
+/*-----------------------------------------------------------------------*/
+/* Process helpers */
+/*-----------------------------------------------------------------------*/
+
+/* This one breaks process abstraction. Prototype is in console-msw.h,
+ used by select_process method in event-msw.c */
+HANDLE
+get_nt_process_handle (Lisp_Process *p)
+{
+ return (NT_DATA (p)->h_process);
+}
+
+static struct Lisp_Process *
+find_process_from_pid (DWORD pid)
+{
+ Lisp_Object tail, proc;
+
+ for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
+ {
+ proc = XCAR (tail);
+ if (NT_DATA (XPROCESS (proc))->dwProcessId == pid)
+ return XPROCESS (proc);
+ }
+ return 0;
+}
+
+\f
+/*-----------------------------------------------------------------------*/
+/* Running remote threads. See Microsoft Systems Journal 1994 Number 5 */
+/* Jeffrey Richter, Load Your 32-bit DLL into Another Process's Address..*/
+/*-----------------------------------------------------------------------*/
+
+typedef struct
+{
+ HANDLE h_process;
+ HANDLE h_thread;
+ LPVOID address;
+} process_memory;
+
+/*
+ * Allocate SIZE bytes in H_PROCESS address space. Fill in PMC used
+ * further by other routines. Return nonzero if successful.
+ *
+ * The memory in other process is allocated by creating a suspended
+ * thread. Initial stack of that thread is used as the memory
+ * block. The thread entry point is the routine ExitThread in
+ * kernel32.dll, so the allocated memory is freed just by resuming the
+ * thread, which immediately terminates after that.
+ */
+
+static int
+alloc_process_memory (HANDLE h_process, size_t size,
+ process_memory* pmc)
+{
+ LPTHREAD_START_ROUTINE adr_ExitThread =
+ (LPTHREAD_START_ROUTINE)
+ GetProcAddress (GetModuleHandle ("kernel32"), "ExitThread");
+ DWORD dw_unused;
+ CONTEXT context;
+ MEMORY_BASIC_INFORMATION mbi;
+
+ pmc->h_process = h_process;
+ pmc->h_thread = CreateRemoteThread (h_process, NULL, size,
+ adr_ExitThread, NULL,
+ CREATE_SUSPENDED, &dw_unused);
+ if (pmc->h_thread == NULL)
+ return 0;
+
+ /* Get context, for thread's stack pointer */
+ context.ContextFlags = CONTEXT_CONTROL;
+ if (!GetThreadContext (pmc->h_thread, &context))
+ goto failure;
+
+ /* Determine base address of the committed range */
+ if (sizeof(mbi) != VirtualQueryEx (h_process,
+#if defined (_X86_)
+ (LPDWORD)context.Esp - 1,
+#elif defined (_ALPHA_)
+ (LPDWORD)context.IntSp - 1,
+#else
+#error Unknown processor architecture
+#endif
+ &mbi, sizeof(mbi)))
+ goto failure;
+
+ /* Change the page protection of the allocated memory to executable,
+ read, and write. */
+ if (!VirtualProtectEx (h_process, mbi.BaseAddress, size,
+ PAGE_EXECUTE_READWRITE, &dw_unused))
+ goto failure;
+
+ pmc->address = mbi.BaseAddress;
+ return 1;
+
+ failure:
+ ResumeThread (pmc->h_thread);
+ pmc->address = 0;
+ return 0;
+}
+
+static void
+free_process_memory (process_memory* pmc)
+{
+ ResumeThread (pmc->h_thread);
+}
+
+/*
+ * Run ROUTINE in the context of process determined by H_PROCESS. The
+ * routine is passed the address of DATA as parameter. The ROUTINE must
+ * not be longer than ROUTINE_CODE_SIZE bytes. DATA_SIZE is the size of
+ * DATA structure.
+ *
+ * Note that the code must be positionally independent, and compiled
+ * without stack checks (they cause implicit calls into CRT so will
+ * fail). DATA should not refer any data in calling process, as both
+ * routine and its data are copied into remote process. Size of data
+ * and code together should not exceed one page (4K on x86 systems).
+ *
+ * Return the value returned by ROUTINE, or (DWORD)-1 if call failed.
+ */
+static DWORD
+run_in_other_process (HANDLE h_process,
+ LPTHREAD_START_ROUTINE routine,
+ LPVOID data, size_t data_size)
+{
+ process_memory pm;
+ const size_t code_size = FRAGMENT_CODE_SIZE;
+ /* Need at most 3 extra bytes of memory, for data alignment */
+ size_t total_size = code_size + data_size + 3;
+ LPVOID remote_data;
+ HANDLE h_thread;
+ DWORD dw_unused;
+
+ /* Allocate memory */
+ if (!alloc_process_memory (h_process, total_size, &pm))
+ return (DWORD)-1;
+
+ /* Copy code */
+ if (!WriteProcessMemory (h_process, pm.address, (LPVOID)routine,
+ code_size, NULL))
+ goto failure;
+
+ /* Copy data */
+ if (data_size)
+ {
+ remote_data = (LPBYTE)pm.address + ((code_size + 4) & ~3);
+ if (!WriteProcessMemory (h_process, remote_data, data, data_size, NULL))
+ goto failure;
+ }
+ else
+ remote_data = NULL;
+
+ /* Execute the remote copy of code, passing it remote data */
+ h_thread = CreateRemoteThread (h_process, NULL, 0,
+ (LPTHREAD_START_ROUTINE) pm.address,
+ remote_data, 0, &dw_unused);
+ if (h_thread == NULL)
+ goto failure;
+
+ /* Wait till thread finishes */
+ WaitForSingleObject (h_thread, INFINITE);
+
+ /* Free remote memory */
+ free_process_memory (&pm);
+
+ /* Return thread's exit code */
+ {
+ DWORD exit_code;
+ GetExitCodeThread (h_thread, &exit_code);
+ CloseHandle (h_thread);
+ return exit_code;
+ }
+
+ failure:
+ free_process_memory (&pm);
+ return (DWORD)-1;
+}
+\f
+/*-----------------------------------------------------------------------*/
+/* Sending signals */
+/*-----------------------------------------------------------------------*/
+
+/* ---------------------------- the NT way ------------------------------- */
+
+/*
+ * We handle the following signals:
+ *
+ * SIGKILL, SIGTERM, SIGQUIT, SIGHUP - These four translate to ExitProcess
+ * executed by the remote process
+ * SIGINT - The remote process is sent CTRL_BREAK_EVENT
+ *
+ * The MSVC5.0 compiler feels free to re-order functions within a
+ * compilation unit, so we have no way of finding out the size of the
+ * following functions. Therefore these functions must not be larger than
+ * FRAGMENT_CODE_SIZE.
+ */
+
+/*
+ * Sending SIGKILL
+ */
+typedef struct
+{
+ void (WINAPI *adr_ExitProcess) (UINT);
+} sigkill_data;
+
+static DWORD WINAPI
+sigkill_proc (sigkill_data* data)
+{
+ (*data->adr_ExitProcess)(255);
+ return 1;
+}
+
+/*
+ * Sending break or control c
+ */
+typedef struct
+{
+ BOOL (WINAPI *adr_GenerateConsoleCtrlEvent) (DWORD, DWORD);
+ DWORD event;
+} sigint_data;
+
+static DWORD WINAPI
+sigint_proc (sigint_data* data)
+{
+ return (*data->adr_GenerateConsoleCtrlEvent) (data->event, 0);
+}
+
+/*
+ * Enabling signals
+ */
+typedef struct
+{
+ BOOL (WINAPI *adr_SetConsoleCtrlHandler) (LPVOID, BOOL);
+} sig_enable_data;
+
+static DWORD WINAPI
+sig_enable_proc (sig_enable_data* data)
+{
+ (*data->adr_SetConsoleCtrlHandler) (NULL, FALSE);
+ return 1;
+}
+
+/*
+ * Send signal SIGNO to process H_PROCESS.
+ * Return nonzero if successful.
+ */
+
+static int
+send_signal_the_nt_way (struct nt_process_data *cp, int pid, int signo)
+{
+ HANDLE h_process;
+ HMODULE h_kernel = GetModuleHandle ("kernel32");
+ int close_process = 0;
+ DWORD retval;
+
+ assert (h_kernel != NULL);
+
+ if (cp)
+ {
+ pid = cp->dwProcessId;
+ h_process = cp->h_process;
+ }
+ else
+ {
+ close_process = 1;
+ /* Try to open the process with required privileges */
+ h_process = OpenProcess (PROCESS_CREATE_THREAD
+ | PROCESS_QUERY_INFORMATION
+ | PROCESS_VM_OPERATION
+ | PROCESS_VM_WRITE,
+ FALSE, pid);
+ if (!h_process)
+ return 0;
+ }
+
+ switch (signo)
+ {
+ case SIGKILL:
+ case SIGTERM:
+ case SIGQUIT:
+ case SIGHUP:
+ {
+ sigkill_data d;
+
+ d.adr_ExitProcess =
+ (void (WINAPI *) (UINT)) GetProcAddress (h_kernel, "ExitProcess");
+ assert (d.adr_ExitProcess);
+ retval = run_in_other_process (h_process,
+ (LPTHREAD_START_ROUTINE)sigkill_proc,
+ &d, sizeof (d));
+ break;
+ }
+ case SIGINT:
+ {
+ sigint_data d;
+ d.adr_GenerateConsoleCtrlEvent =
+ (BOOL (WINAPI *) (DWORD, DWORD))
+ GetProcAddress (h_kernel, "GenerateConsoleCtrlEvent");
+ assert (d.adr_GenerateConsoleCtrlEvent);
+ d.event = CTRL_C_EVENT;
+ retval = run_in_other_process (h_process,
+ (LPTHREAD_START_ROUTINE)sigint_proc,
+ &d, sizeof (d));
+ break;
+ }
+ default:
+ assert (0);
+ }
+
+ if (close_process)
+ CloseHandle (h_process);
+ return (int)retval > 0 ? 1 : 0;
+}
+
+/*
+ * Enable CTRL_C_EVENT handling in a new child process
+ */
+static void
+enable_child_signals (HANDLE h_process)
+{
+ HMODULE h_kernel = GetModuleHandle ("kernel32");
+ sig_enable_data d;
+
+ assert (h_kernel != NULL);
+ d.adr_SetConsoleCtrlHandler =
+ (BOOL (WINAPI *) (LPVOID, BOOL))
+ GetProcAddress (h_kernel, "SetConsoleCtrlHandler");
+ assert (d.adr_SetConsoleCtrlHandler);
+ run_in_other_process (h_process, (LPTHREAD_START_ROUTINE)sig_enable_proc,
+ &d, sizeof (d));
+}
+
+#pragma warning (default : 4113)
+
+/* ---------------------------- the 95 way ------------------------------- */
+
+static BOOL CALLBACK
+find_child_console (HWND hwnd, long putada)
+{
+ DWORD thread_id;
+ DWORD process_id;
+ struct nt_process_data *cp = (struct nt_process_data *) putada;
+
+ thread_id = GetWindowThreadProcessId (hwnd, &process_id);
+ if (process_id == cp->dwProcessId)
+ {
+ char window_class[32];
+
+ GetClassName (hwnd, window_class, sizeof (window_class));
+ if (strcmp (window_class,
+ mswindows_windows9x_p ()
+ ? "tty"
+ : "ConsoleWindowClass") == 0)
+ {
+ cp->hwnd = hwnd;
+ return FALSE;
+ }
+ }
+ /* keep looking */
+ return TRUE;
+}
+
+static int
+send_signal_the_95_way (struct nt_process_data *cp, int pid, int signo)
+{
+ HANDLE h_process;
+ int close_process = 0;
+ int rc = 1;
+
+ if (cp)
+ {
+ pid = cp->dwProcessId;
+ h_process = cp->h_process;
+
+ /* Try to locate console window for process. */
+ EnumWindows (find_child_console, (LPARAM) cp);
+ }
+ else
+ {
+ close_process = 1;
+ /* Try to open the process with required privileges */
+ h_process = OpenProcess (PROCESS_TERMINATE, FALSE, pid);
+ if (!h_process)
+ return 0;
+ }
+
+ if (signo == SIGINT)
+ {
+ if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
+ {
+ BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0);
+ BYTE vk_break_code = VK_CANCEL;
+ BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
+ HWND foreground_window;
+
+ if (break_scan_code == 0)
+ {
+ /* Fake Ctrl-C if we can't manage Ctrl-Break. */
+ vk_break_code = 'C';
+ break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0);
+ }
+
+ foreground_window = GetForegroundWindow ();
+ if (foreground_window)
+ {
+ /* NT 5.0, and apparently also Windows 98, will not allow
+ a Window to be set to foreground directly without the
+ user's involvement. The workaround is to attach
+ ourselves to the thread that owns the foreground
+ window, since that is the only thread that can set the
+ foreground window. */
+ DWORD foreground_thread, child_thread;
+ foreground_thread =
+ GetWindowThreadProcessId (foreground_window, NULL);
+ if (foreground_thread == GetCurrentThreadId ()
+ || !AttachThreadInput (GetCurrentThreadId (),
+ foreground_thread, TRUE))
+ foreground_thread = 0;
+
+ child_thread = GetWindowThreadProcessId (cp->hwnd, NULL);
+ if (child_thread == GetCurrentThreadId ()
+ || !AttachThreadInput (GetCurrentThreadId (),
+ child_thread, TRUE))
+ child_thread = 0;
+
+ /* Set the foreground window to the child. */
+ if (SetForegroundWindow (cp->hwnd))
+ {
+ /* Generate keystrokes as if user had typed Ctrl-Break or
+ Ctrl-C. */
+ keybd_event (VK_CONTROL, control_scan_code, 0, 0);
+ keybd_event (vk_break_code, break_scan_code,
+ (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0);
+ keybd_event (vk_break_code, break_scan_code,
+ (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY)
+ | KEYEVENTF_KEYUP, 0);
+ keybd_event (VK_CONTROL, control_scan_code,
+ KEYEVENTF_KEYUP, 0);
+
+ /* Sleep for a bit to give time for Emacs frame to respond
+ to focus change events (if Emacs was active app). */
+ Sleep (100);
+
+ SetForegroundWindow (foreground_window);
+ }
+ /* Detach from the foreground and child threads now that
+ the foreground switching is over. */
+ if (foreground_thread)
+ AttachThreadInput (GetCurrentThreadId (),
+ foreground_thread, FALSE);
+ if (child_thread)
+ AttachThreadInput (GetCurrentThreadId (),
+ child_thread, FALSE);
+ }
+ }
+ /* Ctrl-Break is NT equivalent of SIGINT. */
+ else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
+ {
+#if 0 /* FSF Emacs */
+ DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
+ "for pid %lu\n", GetLastError (), pid));
+ errno = EINVAL;
+#endif
+ rc = 0;
+ }
+ }
+ else
+ {
+ if (NILP (Vmswindows_start_process_share_console) && cp && cp->hwnd)
+ {
+#if 1
+ if (mswindows_windows9x_p ())
+ {
+/*
+ Another possibility is to try terminating the VDM out-right by
+ calling the Shell VxD (id 0x17) V86 interface, function #4
+ "SHELL_Destroy_VM", ie.
+
+ mov edx,4
+ mov ebx,vm_handle
+ call shellapi
+
+ First need to determine the current VM handle, and then arrange for
+ the shellapi call to be made from the system vm (by using
+ Switch_VM_and_callback).
+
+ Could try to invoke DestroyVM through CallVxD.
+
+*/
+#if 0
+ /* On Win95, posting WM_QUIT causes the 16-bit subsystem
+ to hang when cmdproxy is used in conjunction with
+ command.com for an interactive shell. Posting
+ WM_CLOSE pops up a dialog that, when Yes is selected,
+ does the same thing. TerminateProcess is also less
+ than ideal in that subprocesses tend to stick around
+ until the machine is shutdown, but at least it
+ doesn't freeze the 16-bit subsystem. */
+ PostMessage (cp->hwnd, WM_QUIT, 0xff, 0);
+#endif
+ if (!TerminateProcess (h_process, 0xff))
+ {
+#if 0 /* FSF Emacs */
+ DebPrint (("sys_kill.TerminateProcess returned %d "
+ "for pid %lu\n", GetLastError (), pid));
+ errno = EINVAL;
+#endif
+ rc = 0;
+ }
+ }
+ else
+#endif
+ PostMessage (cp->hwnd, WM_CLOSE, 0, 0);
+ }
+ /* Kill the process. On W32 this doesn't kill child processes
+ so it doesn't work very well for shells which is why it's not
+ used in every case. */
+ else if (!TerminateProcess (h_process, 0xff))
+ {
+#if 0 /* FSF Emacs */
+ DebPrint (("sys_kill.TerminateProcess returned %d "
+ "for pid %lu\n", GetLastError (), pid));
+ errno = EINVAL;
+#endif
+ rc = 0;
+ }
+ }
+
+ if (close_process)
+ CloseHandle (h_process);
+
+ return rc;
+}
+
+/* -------------------------- all-OS functions ---------------------------- */
+
+static int
+send_signal (struct nt_process_data *cp, int pid, int signo)
+{
+ return (!mswindows_windows9x_p () && send_signal_the_nt_way (cp, pid, signo))
+ || send_signal_the_95_way (cp, pid, signo);
+}
+
+/*
+ * Signal error if SIGNO is not supported
+ */
+static void
+validate_signal_number (int signo)
+{
+ if (signo != SIGKILL && signo != SIGTERM
+ && signo != SIGQUIT && signo != SIGINT
+ && signo != SIGHUP)
+ invalid_argument ("Signal number not supported", make_int (signo));
+}
+\f
+/*-----------------------------------------------------------------------*/
+/* Process methods */
+/*-----------------------------------------------------------------------*/
+
+/*
+ * Allocate and initialize Lisp_Process->process_data
+ */
+
+static void
+nt_alloc_process_data (Lisp_Process *p)
+{
+ p->process_data = xnew_and_zero (struct nt_process_data);
+}
+
+static void
+nt_finalize_process_data (Lisp_Process *p, int for_disksave)
+{
+ assert (!for_disksave);
+ /* If it's still in the list of processes we are waiting on delete
+ it. */
+ mswindows_unwait_process (p);
+ if (NT_DATA (p)->h_process)
+ CloseHandle (NT_DATA (p)->h_process);
+}
+
+/*
+ * Initialize XEmacs process implementation once
+ */
+static void
+nt_init_process (void)
+{
+ /* Initialize winsock */
+ WSADATA wsa_data;
+ /* Request Winsock v1.1 Note the order: (minor=1, major=1) */
+ WSAStartup (MAKEWORD (1,1), &wsa_data);
+}
+
+/*
+ * Fork off a subprocess. P is a pointer to newly created subprocess
+ * object. If this function signals, the caller is responsible for
+ * deleting (and finalizing) the process object.
+ *
+ * The method must return PID of the new process, a (positive??? ####) number
+ * which fits into Lisp_Int. No return value indicates an error, the method
+ * must signal an error instead.
+ */
+
+static void
+signal_cannot_launch (Lisp_Object image_file, DWORD err)
+{
+ mswindows_set_errno (err);
+ report_file_error ("Error starting", image_file);
+}
+
+static void
+ensure_console_window_exists (void)
+{
+ if (mswindows_windows9x_p ())
+ mswindows_hide_console ();
+}
+
+int
+compare_env (const void *strp1, const void *strp2)
+{
+ const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
+
+ while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
+ {
+ if ((*str1) > (*str2))
+ return 1;
+ else if ((*str1) < (*str2))
+ return -1;
+ str1++, str2++;
+ }
+
+ if (*str1 == '=' && *str2 == '=')
+ return 0;
+ else if (*str1 == '=')
+ return -1;
+ else
+ return 1;
+}
+
+static int
+nt_create_process (Lisp_Process *p,
+ Lisp_Object *argv, int nargv,
+ Lisp_Object program, Lisp_Object cur_dir)
+{
+ /* Synched up with sys_spawnve in FSF 20.6. Significantly different
+ but still synchable. */
+ HANDLE hmyshove, hmyslurp, hprocin, hprocout, hprocerr;
+ Extbyte *command_line;
+ BOOL do_io, windowed;
+ char *proc_env;
+
+ /* No need to DOS-ize the filename; expand-file-name (called prior)
+ already does this. */
+
+ /* Find out whether the application is windowed or not */
+ if (xSHGetFileInfoA)
+ {
+ /* SHGetFileInfo tends to return ERROR_FILE_NOT_FOUND on most
+ errors. This leads to bogus error message. */
+ DWORD image_type;
+ char *p = strrchr ((char *)XSTRING_DATA (program), '.');
+ if (p != NULL &&
+ (stricmp (p, ".exe") == 0 ||
+ stricmp (p, ".com") == 0 ||
+ stricmp (p, ".bat") == 0 ||
+ stricmp (p, ".cmd") == 0))
+ {
+ image_type = xSHGetFileInfoA ((char *)XSTRING_DATA (program), 0,NULL,
+ 0, SHGFI_EXETYPE);
+ }
+ else
+ {
+ char progname[MAX_PATH];
+ sprintf (progname, "%s.exe", (char *)XSTRING_DATA (program));
+ image_type = xSHGetFileInfoA (progname, 0, NULL, 0, SHGFI_EXETYPE);
+ }
+ if (image_type == 0)
+ signal_cannot_launch (program, (GetLastError () == ERROR_FILE_NOT_FOUND
+ ? ERROR_BAD_FORMAT : GetLastError ()));
+ windowed = HIWORD (image_type) != 0;
+ }
+ else /* NT 3.5; we have no idea so just guess. */
+ windowed = 0;
+
+ /* Decide whether to do I/O on process handles, or just mark the
+ process exited immediately upon successful launching. We do I/O if the
+ process is a console one, or if it is windowed but windowed_process_io
+ is non-zero */
+ do_io = !windowed || windowed_process_io ;
+
+ if (do_io)
+ {
+ /* Create two unidirectional named pipes */
+ HANDLE htmp;
+ SECURITY_ATTRIBUTES sa;
+
+ sa.nLength = sizeof(sa);
+ sa.bInheritHandle = TRUE;
+ sa.lpSecurityDescriptor = NULL;
+
+ CreatePipe (&hprocin, &hmyshove, &sa, 0);
+ CreatePipe (&hmyslurp, &hprocout, &sa, 0);
+
+ /* Duplicate the stdout handle for use as stderr */
+ DuplicateHandle(GetCurrentProcess(), hprocout, GetCurrentProcess(),
+ &hprocerr, 0, TRUE, DUPLICATE_SAME_ACCESS);
+
+ /* Stupid Win32 allows to create a pipe with *both* ends either
+ inheritable or not. We need process ends inheritable, and local
+ ends not inheritable. */
+ DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(),
+ &htmp, 0, FALSE,
+ DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
+ hmyshove = htmp;
+ DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(),
+ &htmp, 0, FALSE,
+ DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
+ hmyslurp = htmp;
+ }
+
+ /* Convert an argv vector into Win32 style command line by a call to
+ lisp function `mswindows-construct-process-command-line'
+ (in win32-native.el) */
+ {
+ int i;
+ Lisp_Object args_or_ret = Qnil;
+ struct gcpro gcpro1;
+
+ GCPRO1 (args_or_ret);
+
+ for (i = 0; i < nargv; ++i)
+ args_or_ret = Fcons (*argv++, args_or_ret);
+ args_or_ret = Fnreverse (args_or_ret);
+ args_or_ret = Fcons (program, args_or_ret);
+
+ args_or_ret = call1 (Qmswindows_construct_process_command_line,
+ args_or_ret);
+
+ if (!STRINGP (args_or_ret))
+ /* Luser wrote his/her own clever version */
+ invalid_argument
+ ("Bogus return value from `mswindows-construct-process-command-line'",
+ args_or_ret);
+
+ LISP_STRING_TO_EXTERNAL (args_or_ret, command_line, Qmswindows_tstr);
+
+ UNGCPRO; /* args_or_ret */
+ }
+
+ /* Set `proc_env' to a nul-separated array of the strings in
+ Vprocess_environment terminated by 2 nuls. */
+
+ {
+ char **env;
+ REGISTER Lisp_Object tem;
+ REGISTER char **new_env;
+ REGISTER int new_length = 0, i, new_space;
+ char *penv;
+
+ for (tem = Vprocess_environment;
+ (CONSP (tem)
+ && STRINGP (XCAR (tem)));
+ tem = XCDR (tem))
+ new_length++;
+
+ /* FSF adds an extra env var to hold the current process ID of the
+ Emacs process. Apparently this is used only by emacsserver.c,
+ which we have superseded to gnuserv.c. (#### Does it work under
+ MS Windows?)
+
+ sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d",
+ GetCurrentProcessId ());
+ arglen += strlen (ppid_env_var_buffer) + 1;
+ numenv++;
+ */
+
+ /* new_length + 1 to include terminating 0. */
+ env = new_env = alloca_array (char *, new_length + 1);
+
+ /* Copy the Vprocess_environment strings into new_env. */
+ for (tem = Vprocess_environment;
+ (CONSP (tem)
+ && STRINGP (XCAR (tem)));
+ tem = XCDR (tem))
+ {
+ char **ep = env;
+ char *string = (char *) XSTRING_DATA (XCAR (tem));
+ /* See if this string duplicates any string already in the env.
+ If so, don't put it in.
+ When an env var has multiple definitions,
+ we keep the definition that comes first in process-environment. */
+ for (; ep != new_env; ep++)
+ {
+ char *p = *ep, *q = string;
+ while (1)
+ {
+ if (*q == 0)
+ /* The string is malformed; might as well drop it. */
+ goto duplicate;
+ if (*q != *p)
+ break;
+ if (*q == '=')
+ goto duplicate;
+ p++, q++;
+ }
+ }
+ *new_env++ = string;
+ duplicate: ;
+ }
+ *new_env = 0;
+
+ /* Sort the environment variables */
+ new_length = new_env - env;
+ qsort (env, new_length, sizeof (char *), compare_env);
+
+ /* Work out how much space to allocate */
+ new_space = 0;
+ for (i = 0; i < new_length; i++)
+ {
+ new_space += strlen(env[i]) + 1;
+ }
+ new_space++;
+
+ /* Allocate space and copy variables into it */
+ penv = proc_env = (char*) alloca(new_space);
+ for (i = 0; i < new_length; i++)
+ {
+ strcpy(penv, env[i]);
+ penv += strlen(env[i]) + 1;
+ }
+ *penv = 0;
+ }
+
+#if 0
+ /* #### we need to port this. */
+ /* On Windows 95, if cmdname is a DOS app, we invoke a helper
+ application to start it by specifying the helper app as cmdname,
+ while leaving the real app name as argv[0]. */
+ if (is_dos_app)
+ {
+ cmdname = (char*) alloca (MAXPATHLEN);
+ if (egetenv ("CMDPROXY"))
+ strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
+ else
+ {
+ strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
+ strcat ((char*)cmdname, "cmdproxy.exe");
+ }
+ }
+#endif
+
+ /* Create process */
+ {
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+ DWORD err;
+ DWORD flags;
+
+ xzero (si);
+ si.dwFlags = STARTF_USESHOWWINDOW;
+ si.wShowWindow = windowed ? SW_SHOWNORMAL : SW_HIDE;
+ if (do_io)
+ {
+ si.hStdInput = hprocin;
+ si.hStdOutput = hprocout;
+ si.hStdError = hprocerr;
+ si.dwFlags |= STARTF_USESTDHANDLES;
+ }
+
+ flags = CREATE_SUSPENDED;
+ if (mswindows_windows9x_p ())
+ flags |= (!NILP (Vmswindows_start_process_share_console)
+ ? CREATE_NEW_PROCESS_GROUP
+ : CREATE_NEW_CONSOLE);
+ else
+ flags |= CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP;
+ if (NILP (Vmswindows_start_process_inherit_error_mode))
+ flags |= CREATE_DEFAULT_ERROR_MODE;
+
+ ensure_console_window_exists ();
+
+ err = (CreateProcess (NULL, command_line, NULL, NULL, TRUE, flags,
+ proc_env, (char *) XSTRING_DATA (cur_dir), &si, &pi)
+ ? 0 : GetLastError ());
+
+ if (do_io)
+ {
+ /* These just have been inherited; we do not need a copy */
+ CloseHandle (hprocin);
+ CloseHandle (hprocout);
+ CloseHandle (hprocerr);
+ }
+
+ /* Handle process creation failure */
+ if (err)
+ {
+ if (do_io)
+ {
+ CloseHandle (hmyshove);
+ CloseHandle (hmyslurp);
+ }
+ signal_cannot_launch (program, GetLastError ());
+ }
+
+ /* The process started successfully */
+ if (do_io)
+ {
+ NT_DATA(p)->h_process = pi.hProcess;
+ NT_DATA(p)->dwProcessId = pi.dwProcessId;
+ init_process_io_handles (p, (void*)hmyslurp, (void*)hmyshove, 0);
+ }
+ else
+ {
+ /* Indicate as if the process has exited immediately. */
+ p->status_symbol = Qexit;
+ CloseHandle (pi.hProcess);
+ }
+
+ if (!windowed)
+ enable_child_signals (pi.hProcess);
+
+ ResumeThread (pi.hThread);
+ CloseHandle (pi.hThread);
+
+ return ((int)pi.dwProcessId);
+ }
+}
+
+/*
+ * This method is called to update status fields of the process
+ * structure. If the process has not existed, this method is expected
+ * to do nothing.
+ *
+ * The method is called only for real child processes.
+ */
+
+static void
+nt_update_status_if_terminated (Lisp_Process* p)
+{
+ DWORD exit_code;
+ if (GetExitCodeProcess (NT_DATA(p)->h_process, &exit_code)
+ && exit_code != STILL_ACTIVE)
+ {
+ p->tick++;
+ p->core_dumped = 0;
+ /* The exit code can be a code returned by process, or an
+ NTSTATUS value. We cannot accurately handle the latter since
+ it is a full 32 bit integer */
+ if (exit_code & 0xC0000000)
+ {
+ p->status_symbol = Qsignal;
+ p->exit_code = exit_code & 0x1FFFFFFF;
+ }
+ else
+ {
+ p->status_symbol = Qexit;
+ p->exit_code = exit_code;
+ }
+ }
+}
+
+/*
+ * Stuff the entire contents of LSTREAM to the process output pipe
+ */
+
+/* #### If only this function could be somehow merged with
+ unix_send_process... */
+
+static void
+nt_send_process (Lisp_Object proc, struct lstream* lstream)
+{
+ volatile Lisp_Object vol_proc = proc;
+ Lisp_Process *volatile p = XPROCESS (proc);
+
+ /* use a reasonable-sized buffer (somewhere around the size of the
+ stream buffer) so as to avoid inundating the stream with blocked
+ data. */
+ Bufbyte chunkbuf[512];
+ Bytecount chunklen;
+
+ while (1)
+ {
+ Lstream_data_count writeret;
+
+ chunklen = Lstream_read (lstream, chunkbuf, 512);
+ if (chunklen <= 0)
+ break; /* perhaps should ABORT() if < 0?
+ This should never happen. */
+
+ /* Lstream_write() will never successfully write less than the
+ amount sent in. In the worst case, it just buffers the
+ unwritten data. */
+ writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM(p)), chunkbuf,
+ chunklen);
+ Lstream_flush (XLSTREAM (DATA_OUTSTREAM(p)));
+ if (writeret < 0)
+ {
+ p->status_symbol = Qexit;
+ p->exit_code = ERROR_BROKEN_PIPE;
+ p->core_dumped = 0;
+ p->tick++;
+ process_tick++;
+ deactivate_process (*((Lisp_Object *) (&vol_proc)));
+ invalid_operation ("Broken pipe error sending to process; closed it",
+ p->name);
+ }
+
+ {
+ int wait_ms = 25;
+ while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
+ {
+ /* Buffer is full. Wait, accepting input; that may allow
+ the program to finish doing output and read more. */
+ Faccept_process_output (Qnil, Qzero, make_int (wait_ms));
+ Lstream_flush (XLSTREAM (p->pipe_outstream));
+ wait_ms = min (1000, 2 * wait_ms);
+ }
+ }
+ }
+}
+
+/*
+ * Send a signal number SIGNO to PROCESS.
+ * CURRENT_GROUP means send to the process group that currently owns
+ * the terminal being used to communicate with PROCESS.
+ * This is used for various commands in shell mode.
+ * If NOMSG is zero, insert signal-announcements into process's buffers
+ * right away.
+ *
+ * If we can, we try to signal PROCESS by sending control characters
+ * down the pty. This allows us to signal inferiors who have changed
+ * their uid, for which killpg would return an EPERM error.
+ *
+ * The method signals an error if the given SIGNO is not valid
+ */
+
+static void
+nt_kill_child_process (Lisp_Object proc, int signo,
+ int current_group, int nomsg)
+{
+ Lisp_Process *p = XPROCESS (proc);
+
+ /* Signal error if SIGNO cannot be sent */
+ validate_signal_number (signo);
+
+ /* Send signal */
+ if (!send_signal (NT_DATA (p), 0, signo))
+ invalid_operation ("Cannot send signal to process", proc);
+}
+
+/*
+ * Kill any process in the system given its PID
+ *
+ * Returns zero if a signal successfully sent, or
+ * negative number upon failure
+ */
+static int
+nt_kill_process_by_pid (int pid, int signo)
+{
+ struct Lisp_Process *p;
+
+ /* Signal error if SIGNO cannot be sent */
+ validate_signal_number (signo);
+
+ p = find_process_from_pid (pid);
+ return send_signal (p ? NT_DATA (p) : 0, pid, signo) ? 0 : -1;
+}
+\f
+/*-----------------------------------------------------------------------*/
+/* Sockets connections */
+/*-----------------------------------------------------------------------*/
+#ifdef HAVE_SOCKETS
+
+/* #### Hey MS, how long Winsock 2 for '95 will be in beta? */
+
+#define SOCK_TIMER_ID 666
+#define XM_SOCKREPLY (WM_USER + 666)
+
+static int
+get_internet_address (Lisp_Object host, struct sockaddr_in *address,
+ Error_behavior errb)
+{
+ char buf [MAXGETHOSTSTRUCT];
+ HWND hwnd;
+ HANDLE hasync;
+ int success = 0;
+
+ address->sin_family = AF_INET;
+
+ /* First check if HOST is already a numeric address */
+ {
+ unsigned long inaddr = inet_addr (XSTRING_DATA (host));
+ if (inaddr != INADDR_NONE)
+ {
+ address->sin_addr.s_addr = inaddr;
+ return 1;
+ }
+ }
+
+ /* Create a window which will receive completion messages */
+ hwnd = CreateWindow ("STATIC", NULL, WS_OVERLAPPED, 0, 0, 1, 1,
+ NULL, NULL, NULL, NULL);
+ assert (hwnd);
+
+ /* Post name resolution request */
+ hasync = WSAAsyncGetHostByName (hwnd, XM_SOCKREPLY, XSTRING_DATA (host),
+ buf, sizeof (buf));
+ if (hasync == NULL)
+ goto done;
+
+ /* Set a timer to poll for quit every 250 ms */
+ SetTimer (hwnd, SOCK_TIMER_ID, 250, NULL);
+
+ while (1)
+ {
+ MSG msg;
+ GetMessage (&msg, hwnd, 0, 0);
+ if (msg.message == XM_SOCKREPLY)
+ {
+ /* Ok, got an answer */
+ if (WSAGETASYNCERROR(msg.lParam) == NO_ERROR)
+ success = 1;
+ else
+ {
+ warn_when_safe(Qstream, Qwarning,
+ "cannot get IP address for host \"%s\"",
+ XSTRING_DATA (host));
+ }
+ goto done;
+ }
+ else if (msg.message == WM_TIMER && msg.wParam == SOCK_TIMER_ID)
+ {
+ if (QUITP)
+ {
+ WSACancelAsyncRequest (hasync);
+ KillTimer (hwnd, SOCK_TIMER_ID);
+ DestroyWindow (hwnd);
+ REALLY_QUIT;
+ }
+ }
+ DispatchMessage (&msg);
+ }
+
+ done:
+ KillTimer (hwnd, SOCK_TIMER_ID);
+ DestroyWindow (hwnd);
+ if (success)
+ {
+ /* BUF starts with struct hostent */
+ struct hostent* he = (struct hostent*) buf;
+ address->sin_addr.s_addr = *(unsigned long*)he->h_addr_list[0];
+ }
+ return success;
+}
+
+static Lisp_Object
+nt_canonicalize_host_name (Lisp_Object host)
+{
+ struct sockaddr_in address;
+
+ if (!get_internet_address (host, &address, ERROR_ME_NOT))
+ return host;
+
+ if (address.sin_family == AF_INET)
+ return build_string (inet_ntoa (address.sin_addr));
+ else
+ return host;
+}
+
+/* open a TCP network connection to a given HOST/SERVICE. Treated
+ exactly like a normal process when reading and writing. Only
+ differences are in status display and process deletion. A network
+ connection has no PID; you cannot signal it. All you can do is
+ deactivate and close it via delete-process */
+
+static void
+nt_open_network_stream (Lisp_Object name, Lisp_Object host,
+ Lisp_Object service,
+ Lisp_Object protocol, void** vinfd, void** voutfd)
+{
+ /* !!#### not Mule-ized */
+ struct sockaddr_in address;
+ SOCKET s;
+ int port;
+ int retval;
+
+ CHECK_STRING (host);
+
+ if (!EQ (protocol, Qtcp))
+ invalid_argument ("Unsupported protocol", protocol);
+
+ if (INTP (service))
+ port = htons ((unsigned short) XINT (service));
+ else
+ {
+ struct servent *svc_info;
+ CHECK_STRING (service);
+ svc_info = getservbyname ((char *) XSTRING_DATA (service), "tcp");
+ if (svc_info == 0)
+ invalid_argument ("Unknown service", service);
+ port = svc_info->s_port;
+ }
+
+ get_internet_address (host, &address, ERROR_ME);
+ address.sin_port = port;
+
+ s = socket (address.sin_family, SOCK_STREAM, 0);
+ if (s < 0)
+ report_file_error ("error creating socket", list1 (name));
+
+ /* We don't want to be blocked on connect */
+ {
+ unsigned long nonblock = 1;
+ ioctlsocket (s, FIONBIO, &nonblock);
+ }
+
+ retval = connect (s, (struct sockaddr *) &address, sizeof (address));
+ if (retval != NO_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
+ goto connect_failed;
+ /* Wait while connection is established */
+ while (1)
+ {
+ fd_set fdset;
+ struct timeval tv;
+ int nsel;
+
+ if (QUITP)
+ {
+ closesocket (s);
+ REALLY_QUIT;
+ }
+
+ /* Poll for quit every 250 ms */
+ tv.tv_sec = 0;
+ tv.tv_usec = 250 * 1000;
+
+ FD_ZERO (&fdset);
+ FD_SET (s, &fdset);
+ nsel = select (0, NULL, &fdset, &fdset, &tv);
+
+ if (nsel > 0)
+ {
+ /* Check: was connection successful or not? */
+ tv.tv_usec = 0;
+ nsel = select (0, NULL, NULL, &fdset, &tv);
+ if (nsel > 0)
+ goto connect_failed;
+ else
+ break;
+ }
+ }
+
+ /* We are connected at this point */
+ *vinfd = (void*)s;
+ DuplicateHandle (GetCurrentProcess(), (HANDLE)s,
+ GetCurrentProcess(), (LPHANDLE)voutfd,
+ 0, FALSE, DUPLICATE_SAME_ACCESS);
+ return;
+
+ connect_failed:
+ closesocket (s);
+ if (INTP (service))
+ {
+ warn_when_safe (Qstream, Qwarning,
+ "failure to open network stream to host \"%s\" for service \"%d\"",
+ XSTRING_DATA (host),
+ (unsigned short) XINT (service));
+ }
+ else
+ {
+ warn_when_safe (Qstream, Qwarning,
+ "failure to open network stream to host \"%s\" for service \"%s\"",
+ XSTRING_DATA (host),
+ XSTRING_DATA (service));
+ }
+ report_file_error ("connection failed", list2 (host, name));
+}
+
+#endif
+\f
+/*-----------------------------------------------------------------------*/
+/* Initialization */
+/*-----------------------------------------------------------------------*/
+
+void
+process_type_create_nt (void)
+{
+ PROCESS_HAS_METHOD (nt, alloc_process_data);
+ PROCESS_HAS_METHOD (nt, finalize_process_data);
+ PROCESS_HAS_METHOD (nt, init_process);
+ PROCESS_HAS_METHOD (nt, create_process);
+ PROCESS_HAS_METHOD (nt, update_status_if_terminated);
+ PROCESS_HAS_METHOD (nt, send_process);
+ PROCESS_HAS_METHOD (nt, kill_child_process);
+ PROCESS_HAS_METHOD (nt, kill_process_by_pid);
+#ifdef HAVE_SOCKETS
+ PROCESS_HAS_METHOD (nt, canonicalize_host_name);
+ PROCESS_HAS_METHOD (nt, open_network_stream);
+#ifdef HAVE_MULTICAST
+#error I won't do this until '95 has winsock2
+ PROCESS_HAS_METHOD (nt, open_multicast_group);
+#endif
+#endif
+}
+
+void
+syms_of_process_nt (void)
+{
+ DEFSYMBOL (Qmswindows_construct_process_command_line);
+}
+
+void
+vars_of_process_nt (void)
+{
+ DEFVAR_LISP ("mswindows-start-process-share-console",
+ &Vmswindows_start_process_share_console /*
+When nil, new child processes are given a new console.
+When non-nil, they share the Emacs console; this has the limitation of
+allowing only one DOS subprocess to run at a time (whether started directly
+or indirectly by Emacs), and preventing Emacs from cleanly terminating the
+subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
+otherwise respond to interrupts from Emacs.
+*/ );
+ Vmswindows_start_process_share_console = Qnil;
+
+ DEFVAR_LISP ("mswindows-start-process-inherit-error-mode",
+ &Vmswindows_start_process_inherit_error_mode /*
+ "When nil, new child processes revert to the default error mode.
+When non-nil, they inherit their error mode setting from Emacs, which stops
+them blocking when trying to access unmounted drives etc.
+*/ );
+ Vmswindows_start_process_inherit_error_mode = Qt;
+}
projects / chise / xemacs-chise.git- / blobdiff