-/* Process support for Windows NT port of GNU EMACS.
- Copyright (C) 1992, 1995 Free Software Foundation, Inc.
+/* Process support for GNU Emacs on the Microsoft W32 API.
+ Copyright (C) 1992, 1995, 1999 Free Software Foundation, Inc.
- This file is part of GNU Emacs.
+This file is part of GNU Emacs.
- GNU Emacs 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.
+GNU Emacs 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.
- GNU Emacs 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.
+GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.
Drew Bliss Oct 14, 1993
Adapted from alarm.c by Tim Fleehart
*/
-#include <config.h>
-
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <io.h>
+#include <fcntl.h>
#include <signal.h>
+/* must include CRT headers *before* config.h */
+#include "config.h"
+#undef signal
+#undef wait
+#undef spawnve
+#undef select
+#undef kill
+
#include <windows.h>
#include "lisp.h"
-#include "nt.h"
+#include "w32.h"
+#include "w32heap.h"
#include "systime.h"
+#include "syswait.h"
+#include "process.h"
+#include "w32term.h"
-/* #define FULL_DEBUG */
+/* Control whether spawnve quotes arguments as necessary to ensure
+ correct parsing by child process. Because not all uses of spawnve
+ are careful about constructing argv arrays, we make this behaviour
+ conditional (off by default). */
+Lisp_Object Vw32_quote_process_args;
-typedef void (_CALLBACK_ *signal_handler)(int);
+/* Control whether create_child causes the process' window to be
+ hidden. The default is nil. */
+Lisp_Object Vw32_start_process_show_window;
-/* Defined in process.h which conflicts with the local copy */
-#define _P_NOWAIT 1
+/* 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 Vw32_start_process_share_console;
-typedef struct _child_process
-{
- int fd;
- HANDLE char_avail;
- HANDLE char_consumed;
- char chr;
- BOOL status;
- HANDLE process;
- DWORD pid;
- HANDLE thrd;
-} child_process;
+/* 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 Vw32_start_process_inherit_error_mode;
+
+/* Time to sleep before reading from a subprocess output pipe - this
+ avoids the inefficiency of frequently reading small amounts of data.
+ This is primarily necessary for handling DOS processes on Windows 95,
+ but is useful for W32 processes on both Windows 95 and NT as well. */
+Lisp_Object Vw32_pipe_read_delay;
+
+/* Control conversion of upper case file names to lower case.
+ nil means no, t means yes. */
+Lisp_Object Vw32_downcase_file_names;
+
+/* Control whether stat() attempts to generate fake but hopefully
+ "accurate" inode values, by hashing the absolute truenames of files.
+ This should detect aliasing between long and short names, but still
+ allows the possibility of hash collisions. */
+Lisp_Object Vw32_generate_fake_inodes;
+
+/* Control whether stat() attempts to determine file type and link count
+ exactly, at the expense of slower operation. Since true hard links
+ are supported on NTFS volumes, this is only relevant on NT. */
+Lisp_Object Vw32_get_true_file_attributes;
-#define MAX_CHILDREN MAXDESC
+Lisp_Object Qhigh, Qlow;
#ifdef EMACSDEBUG
-void _CRTAPI1
-_DebPrint (char *fmt, ...)
+void _DebPrint (const char *fmt, ...)
{
- char buf[256];
+ char buf[1024];
va_list args;
va_start (args, fmt);
}
#endif
-/* Child process management list. */
-static int child_proc_count = 0;
-static child_process child_procs[MAX_CHILDREN];
-static child_process *dead_child = NULL;
-
-#define CHILD_ACTIVE(cp) ((cp)->process != NULL)
-#define DEACTIVATE_CHILD(cp) ((cp)->process = NULL)
+typedef void (_CALLBACK_ *signal_handler)(int);
/* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */
static signal_handler sig_handlers[NSIG];
/* Fake signal implementation to record the SIGCHLD handler. */
signal_handler
-win32_signal (int sig, signal_handler handler)
+sys_signal (int sig, signal_handler handler)
{
signal_handler old;
return old;
}
+/* Defined in <process.h> which conflicts with the local copy */
+#define _P_NOWAIT 1
+
+/* Child process management list. */
+int child_proc_count = 0;
+child_process child_procs[ MAX_CHILDREN ];
+child_process *dead_child = NULL;
+
+DWORD WINAPI reader_thread (void *arg);
+
/* Find an unused process slot. */
-static child_process *
+child_process *
new_child (void)
{
child_process *cp;
-
- if (child_proc_count == MAX_CHILDREN)
- return NULL;
+ DWORD id;
for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
if (!CHILD_ACTIVE (cp))
- return cp;
- return &child_procs[child_proc_count++];
+ goto Initialise;
+ if (child_proc_count == MAX_CHILDREN)
+ return NULL;
+ cp = &child_procs[child_proc_count++];
+
+ Initialise:
+ memset (cp, 0, sizeof(*cp));
+ cp->fd = -1;
+ cp->pid = -1;
+ cp->procinfo.hProcess = NULL;
+ cp->status = STATUS_READ_ERROR;
+
+ /* use manual reset event so that select() will function properly */
+ cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL);
+ if (cp->char_avail)
+ {
+ cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL);
+ if (cp->char_consumed)
+ {
+ cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id);
+ if (cp->thrd)
+ return cp;
+ }
+ }
+ delete_child (cp);
+ return NULL;
+}
+
+void
+delete_child (child_process *cp)
+{
+ int i;
+
+ /* Should not be deleting a child that is still needed. */
+ for (i = 0; i < MAXDESC; i++)
+ if (fd_info[i].cp == cp)
+ abort ();
+
+ if (!CHILD_ACTIVE (cp))
+ return;
+
+ /* reap thread if necessary */
+ if (cp->thrd)
+ {
+ DWORD rc;
+
+ if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE)
+ {
+ /* let the thread exit cleanly if possible */
+ cp->status = STATUS_READ_ERROR;
+ SetEvent (cp->char_consumed);
+ if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0)
+ {
+ DebPrint (("delete_child.WaitForSingleObject (thread) failed "
+ "with %lu for fd %ld\n", GetLastError (), cp->fd));
+ TerminateThread (cp->thrd, 0);
+ }
+ }
+ CloseHandle (cp->thrd);
+ cp->thrd = NULL;
+ }
+ if (cp->char_avail)
+ {
+ CloseHandle (cp->char_avail);
+ cp->char_avail = NULL;
+ }
+ if (cp->char_consumed)
+ {
+ CloseHandle (cp->char_consumed);
+ cp->char_consumed = NULL;
+ }
+
+ /* update child_proc_count (highest numbered slot in use plus one) */
+ if (cp == child_procs + child_proc_count - 1)
+ {
+ for (i = child_proc_count-1; i >= 0; i--)
+ if (CHILD_ACTIVE (&child_procs[i]))
+ {
+ child_proc_count = i + 1;
+ break;
+ }
+ }
+ if (i < 0)
+ child_proc_count = 0;
}
/* Find a child by pid. */
find_child_pid (DWORD pid)
{
child_process *cp;
-
+
for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
if (CHILD_ACTIVE (cp) && pid == cp->pid)
return cp;
return NULL;
}
-/* Find a child by fd. */
-static child_process *
-find_child_fd (int fd)
-{
- child_process *cp;
-
- for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
- if (CHILD_ACTIVE (cp) && fd == cp->fd)
- return cp;
- return NULL;
-}
-/* Thread proc for child process reader threads
- The threads just sit in a loop waiting for input
- When they detect input, they signal the char_avail input to
- wake up the select emulator
- When the select emulator processes their input, it pulses
- char_consumed so that the reader thread goes back to reading. */
+/* Thread proc for child process and socket reader threads. Each thread
+ is normally blocked until woken by select() to check for input by
+ reading one char. When the read completes, char_avail is signalled
+ to wake up the select emulator and the thread blocks itself again. */
DWORD WINAPI
reader_thread (void *arg)
{
cp = (child_process *)arg;
/* We have to wait for the go-ahead before we can start */
- if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
- return 0;
- /* If something went wrong, quit */
- if (!cp->status)
- return 0;
-
+ if (cp == NULL
+ || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0)
+ return 1;
+
for (;;)
{
- /* Use read to get CRLF translation */
- if (read (cp->fd, &cp->chr, sizeof (char)) == sizeof (char))
- {
- cp->status = TRUE;
- }
- else
- {
-#ifdef FULL_DEBUG
- DebPrint (("reader_thread.read failed with %lu for fd %ld\n",
- GetLastError (), cp->fd));
-#endif
- cp->status = FALSE;
- }
-
+ int rc;
+
+ rc = _sys_read_ahead (cp->fd);
+
+ /* The name char_avail is a misnomer - it really just means the
+ read-ahead has completed, whether successfully or not. */
if (!SetEvent (cp->char_avail))
{
DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n",
GetLastError (), cp->fd));
- break;
- }
+ return 1;
+ }
+
+ if (rc == STATUS_READ_ERROR)
+ return 1;
/* If the read died, the child has died so let the thread die */
- if (!cp->status)
+ if (rc == STATUS_READ_FAILED)
break;
/* Wait until our input is acknowledged before reading again */
return 0;
}
+/* To avoid Emacs changing directory, we just record here the directory
+ the new process should start in. This is set just before calling
+ sys_spawnve, and is not generally valid at any other time. */
+static char * process_dir;
+
static BOOL
create_child (char *exe, char *cmdline, char *env,
- PROCESS_INFORMATION *info)
+ int * pPid, child_process *cp)
{
- child_process *cp;
- DWORD id;
STARTUPINFO start;
SECURITY_ATTRIBUTES sec_attrs;
SECURITY_DESCRIPTOR sec_desc;
+ DWORD flags;
+ char dir[ MAXPATHLEN ];
- cp = new_child ();
- if (cp == NULL)
- goto EH_Fail;
-
- cp->fd = -1;
-
- cp->char_avail = CreateEvent (NULL, FALSE, FALSE, NULL);
- if (cp->char_avail == NULL)
- goto EH_Fail;
-
- cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL);
- if (cp->char_consumed == NULL)
- goto EH_char_avail;
-
- cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id);
- if (cp->thrd == NULL)
- goto EH_char_consumed;
+ if (cp == NULL) abort ();
memset (&start, 0, sizeof (start));
start.cb = sizeof (start);
+#ifdef HAVE_NTGUI
+ if (NILP (Vw32_start_process_show_window))
+ start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+ else
+ start.dwFlags = STARTF_USESTDHANDLES;
+ start.wShowWindow = SW_HIDE;
+
+ start.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
+ start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
+ start.hStdError = GetStdHandle (STD_ERROR_HANDLE);
+#endif /* HAVE_NTGUI */
+
/* Explicitly specify no security */
if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION))
- goto EH_thrd;
+ goto EH_Fail;
if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE))
- goto EH_thrd;
+ goto EH_Fail;
sec_attrs.nLength = sizeof (sec_attrs);
sec_attrs.lpSecurityDescriptor = &sec_desc;
sec_attrs.bInheritHandle = FALSE;
+ strcpy (dir, process_dir);
+ unixtodos_filename (dir);
+
+ flags = (!NILP (Vw32_start_process_share_console)
+ ? CREATE_NEW_PROCESS_GROUP
+ : CREATE_NEW_CONSOLE);
+ if (NILP (Vw32_start_process_inherit_error_mode))
+ flags |= CREATE_DEFAULT_ERROR_MODE;
if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE,
- CREATE_NEW_PROCESS_GROUP, env, NULL,
- &start, info))
- goto EH_thrd;
- cp->process = info->hProcess;
- cp->pid = info->dwProcessId;
-
+ flags, env, dir, &start, &cp->procinfo))
+ goto EH_Fail;
+
+ cp->pid = (int) cp->procinfo.dwProcessId;
+
+ /* Hack for Windows 95, which assigns large (ie negative) pids */
+ if (cp->pid < 0)
+ cp->pid = -cp->pid;
+
+ /* pid must fit in a Lisp_Int */
+ cp->pid = (cp->pid & VALMASK);
+
+ *pPid = cp->pid;
+
return TRUE;
-
- EH_thrd:
- id = GetLastError ();
-
- cp->status = FALSE;
- SetEvent (cp->char_consumed);
- EH_char_consumed:
- CloseHandle (cp->char_consumed);
- EH_char_avail:
- CloseHandle (cp->char_avail);
+
EH_Fail:
+ DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError()););
return FALSE;
}
#endif
cp->fd = fd;
- cp->status = TRUE;
- /* Tell the reader thread to start */
- if (!SetEvent (cp->char_consumed))
+ /* thread is initially blocked until select is called; set status so
+ that select will release thread */
+ cp->status = STATUS_READ_ACKNOWLEDGED;
+
+ /* attach child_process to fd_info */
+ if (fd_info[fd].cp != NULL)
{
- DebPrint (("register_child.SetEvent failed with %lu for fd %ld\n",
- GetLastError (), cp->fd));
+ DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd));
+ abort ();
}
+
+ fd_info[fd].cp = cp;
}
/* When a process dies its pipe will break so the reader thread will
The select emulator then calls this routine to clean up.
Since the thread signaled failure we can assume it is exiting. */
static void
-remove_child (child_process *cp)
+reap_subprocess (child_process *cp)
{
- /* Reap the thread */
- if (WaitForSingleObject (cp->thrd, INFINITE) != WAIT_OBJECT_0)
- {
- DebPrint (("remove_child.WaitForSingleObject (thread) failed "
- "with %lu for fd %ld\n", GetLastError (), cp->fd));
- }
- CloseHandle (cp->thrd);
- CloseHandle (cp->char_consumed);
- CloseHandle (cp->char_avail);
-
- /* Reap the process */
- if (WaitForSingleObject (cp->process, INFINITE) != WAIT_OBJECT_0)
+ if (cp->procinfo.hProcess)
{
- DebPrint (("remove_child.WaitForSingleObject (process) failed "
- "with %lu for fd %ld\n", GetLastError (), cp->fd));
+ /* Reap the process */
+#ifdef FULL_DEBUG
+ /* Process should have already died before we are called. */
+ if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0)
+ DebPrint (("reap_subprocess: child fpr fd %d has not died yet!", cp->fd));
+#endif
+ CloseHandle (cp->procinfo.hProcess);
+ cp->procinfo.hProcess = NULL;
+ CloseHandle (cp->procinfo.hThread);
+ cp->procinfo.hThread = NULL;
}
- CloseHandle (cp->process);
-
- DEACTIVATE_CHILD (cp);
+
+ /* For asynchronous children, the child_proc resources will be freed
+ when the last pipe read descriptor is closed; for synchronous
+ children, we must explicitly free the resources now because
+ register_child has not been called. */
+ if (cp->fd == -1)
+ delete_child (cp);
}
/* Wait for any of our existing child processes to die
When it does, close its handle
Return the pid and fill in the status if non-NULL. */
-/* From callproc.c */
-extern int synch_process_alive;
-extern int synch_process_retcode;
-
int
-win32_wait (int *status)
+sys_wait (int *status)
{
DWORD active, retval;
int nh;
+ int pid;
child_process *cp, *cps[MAX_CHILDREN];
HANDLE wait_hnd[MAX_CHILDREN];
if (dead_child != NULL)
{
/* We want to wait for a specific child */
- wait_hnd[nh] = dead_child->process;
+ wait_hnd[nh] = dead_child->procinfo.hProcess;
cps[nh] = dead_child;
+ if (!wait_hnd[nh]) abort ();
nh++;
+ active = 0;
+ goto get_result;
}
else
{
for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
- if (CHILD_ACTIVE (cp))
+ /* some child_procs might be sockets; ignore them */
+ if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess)
{
- wait_hnd[nh] = cp->process;
+ wait_hnd[nh] = cp->procinfo.hProcess;
cps[nh] = cp;
nh++;
}
errno = ECHILD;
return -1;
}
-
- active = WaitForMultipleObjects (nh, wait_hnd, FALSE, INFINITE);
+
+ do
+ {
+ /* Check for quit about once a second. */
+ QUIT;
+ active = WaitForMultipleObjects (nh, wait_hnd, FALSE, 1000);
+ } while (active == WAIT_TIMEOUT);
+
if (active == WAIT_FAILED)
{
errno = EBADF;
return -1;
}
- else if (active == WAIT_TIMEOUT)
- {
- /* Should never happen */
- errno = EINVAL;
- return -1;
- }
- else if (active >= WAIT_OBJECT_0 &&
- active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
+ else if (active >= WAIT_OBJECT_0
+ && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
{
active -= WAIT_OBJECT_0;
}
- else if (active >= WAIT_ABANDONED_0 &&
- active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
+ else if (active >= WAIT_ABANDONED_0
+ && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
{
active -= WAIT_ABANDONED_0;
}
-
+ else
+ abort ();
+
+get_result:
if (!GetExitCodeProcess (wait_hnd[active], &retval))
{
DebPrint (("Wait.GetExitCodeProcess failed with %lu\n",
errno = EINVAL;
return -1;
}
+
+ /* Massage the exit code from the process to match the format expected
+ by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and
+ WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */
+
+ if (retval == STATUS_CONTROL_C_EXIT)
+ retval = SIGINT;
+ else
+ retval <<= 8;
cp = cps[active];
+ pid = cp->pid;
+#ifdef FULL_DEBUG
+ DebPrint (("Wait signaled with process pid %d\n", cp->pid));
+#endif
if (status)
{
else if (synch_process_alive)
{
synch_process_alive = 0;
- synch_process_retcode = retval;
- TerminateThread (cp->thrd, 0);
- CloseHandle (cp->thrd);
- CloseHandle (cp->char_consumed);
- CloseHandle (cp->char_avail);
- CloseHandle (cp->process);
- DEACTIVATE_CHILD (cp);
+ /* Report the status of the synchronous process. */
+ if (WIFEXITED (retval))
+ synch_process_retcode = WRETCODE (retval);
+ else if (WIFSIGNALED (retval))
+ {
+ int code = WTERMSIG (retval);
+ char *signame;
+
+ synchronize_system_messages_locale ();
+ signame = strsignal (code);
+
+ if (signame == 0)
+ signame = "unknown";
+
+ synch_process_death = signame;
+ }
+
+ reap_subprocess (cp);
+ }
+
+ reap_subprocess (cp);
+
+ return pid;
+}
+
+void
+w32_executable_type (char * filename, int * is_dos_app, int * is_cygnus_app)
+{
+ file_data executable;
+ char * p;
+
+ /* Default values in case we can't tell for sure. */
+ *is_dos_app = FALSE;
+ *is_cygnus_app = FALSE;
+
+ if (!open_input_file (&executable, filename))
+ return;
+
+ p = strrchr (filename, '.');
+
+ /* We can only identify DOS .com programs from the extension. */
+ if (p && stricmp (p, ".com") == 0)
+ *is_dos_app = TRUE;
+ else if (p && (stricmp (p, ".bat") == 0
+ || stricmp (p, ".cmd") == 0))
+ {
+ /* A DOS shell script - it appears that CreateProcess is happy to
+ accept this (somewhat surprisingly); presumably it looks at
+ COMSPEC to determine what executable to actually invoke.
+ Therefore, we have to do the same here as well. */
+ /* Actually, I think it uses the program association for that
+ extension, which is defined in the registry. */
+ p = egetenv ("COMSPEC");
+ if (p)
+ w32_executable_type (p, is_dos_app, is_cygnus_app);
+ }
+ else
+ {
+ /* Look for DOS .exe signature - if found, we must also check that
+ it isn't really a 16- or 32-bit Windows exe, since both formats
+ start with a DOS program stub. Note that 16-bit Windows
+ executables use the OS/2 1.x format. */
+
+ IMAGE_DOS_HEADER * dos_header;
+ IMAGE_NT_HEADERS * nt_header;
+
+ dos_header = (PIMAGE_DOS_HEADER) executable.file_base;
+ if (dos_header->e_magic != IMAGE_DOS_SIGNATURE)
+ goto unwind;
+
+ nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
+
+ if ((char *) nt_header > (char *) dos_header + executable.size)
+ {
+ /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
+ *is_dos_app = TRUE;
+ }
+ else if (nt_header->Signature != IMAGE_NT_SIGNATURE
+ && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE)
+ {
+ *is_dos_app = TRUE;
+ }
+ else if (nt_header->Signature == IMAGE_NT_SIGNATURE)
+ {
+ /* Look for cygwin.dll in DLL import list. */
+ IMAGE_DATA_DIRECTORY import_dir =
+ nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
+ IMAGE_IMPORT_DESCRIPTOR * imports;
+ IMAGE_SECTION_HEADER * section;
+
+ section = rva_to_section (import_dir.VirtualAddress, nt_header);
+ imports = RVA_TO_PTR (import_dir.VirtualAddress, section, executable);
+
+ for ( ; imports->Name; imports++)
+ {
+ char * dllname = RVA_TO_PTR (imports->Name, section, executable);
+
+ /* The exact name of the cygwin dll has changed with
+ various releases, but hopefully this will be reasonably
+ future proof. */
+ if (strncmp (dllname, "cygwin", 6) == 0)
+ {
+ *is_cygnus_app = TRUE;
+ break;
+ }
+ }
+ }
}
- return cp->pid;
+unwind:
+ close_file_data (&executable);
+}
+
+int
+compare_env (const char **strp1, const char **strp2)
+{
+ const char *str1 = *strp1, *str2 = *strp2;
+
+ while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
+ {
+ if (tolower (*str1) > tolower (*str2))
+ return 1;
+ else if (tolower (*str1) < tolower (*str2))
+ return -1;
+ str1++, str2++;
+ }
+
+ if (*str1 == '=' && *str2 == '=')
+ return 0;
+ else if (*str1 == '=')
+ return -1;
+ else
+ return 1;
}
-/* We pass our process ID to our children by setting up an environment
- variable in their environment. */
-char ppid_env_var_buffer[64];
+void
+merge_and_sort_env (char **envp1, char **envp2, char **new_envp)
+{
+ char **optr, **nptr;
+ int num;
+
+ nptr = new_envp;
+ optr = envp1;
+ while (*optr)
+ *nptr++ = *optr++;
+ num = optr - envp1;
+
+ optr = envp2;
+ while (*optr)
+ *nptr++ = *optr++;
+ num += optr - envp2;
+
+ qsort (new_envp, num, sizeof (char *), compare_env);
+
+ *nptr = NULL;
+}
/* When a new child process is created we need to register it in our list,
so intercept spawn requests. */
int
-win32_spawnve (int mode, char *cmdname, char **argv, char **envp)
+sys_spawnve (int mode, char *cmdname, char **argv, char **envp)
{
Lisp_Object program, full;
char *cmdline, *env, *parg, **targ;
- int arglen;
- PROCESS_INFORMATION pi;
+ int arglen, numenv;
+ int pid;
+ child_process *cp;
+ int is_dos_app, is_cygnus_app;
+ int do_quoting = 0;
+ char escape_char;
+ /* We pass our process ID to our children by setting up an environment
+ variable in their environment. */
+ char ppid_env_var_buffer[64];
+ char *extra_env[] = {ppid_env_var_buffer, NULL};
+
+ /* We don't care about the other modes */
+ if (mode != _P_NOWAIT)
+ {
+ errno = EINVAL;
+ return -1;
+ }
/* Handle executable names without an executable suffix. */
program = make_string (cmdname, strlen (cmdname));
errno = EINVAL;
return -1;
}
- cmdname = XSTRING (full)->data;
- argv[0] = cmdname;
+ program = full;
}
- if (child_proc_count == MAX_CHILDREN)
- {
- errno = EAGAIN;
- return -1;
- }
-
- /* We don't care about the other modes */
- if (mode != _P_NOWAIT)
+ /* make sure argv[0] and cmdname are both in DOS format */
+ cmdname = XSTRING (program)->data;
+ unixtodos_filename (cmdname);
+ argv[0] = cmdname;
+
+ /* Determine whether program is a 16-bit DOS executable, or a w32
+ executable that is implicitly linked to the Cygnus dll (implying it
+ was compiled with the Cygnus GNU toolchain and hence relies on
+ cygwin.dll to parse the command line - we use this to decide how to
+ escape quote chars in command line args that must be quoted). */
+ w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app);
+
+ /* 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)
{
- errno = EINVAL;
- return -1;
+ cmdname = alloca (MAXPATHLEN);
+ if (egetenv ("CMDPROXY"))
+ strcpy (cmdname, egetenv ("CMDPROXY"));
+ else
+ {
+ strcpy (cmdname, XSTRING (Vinvocation_directory)->data);
+ strcat (cmdname, "cmdproxy.exe");
+ }
+ unixtodos_filename (cmdname);
}
/* we have to do some conjuring here to put argv and envp into the
form CreateProcess wants... argv needs to be a space separated/null
terminated list of parameters, and envp is a null
separated/double-null terminated list of parameters.
-
- Since I have no idea how large argv and envp are likely to be
- we figure out list lengths on the fly and allocate them. */
+
+ Additionally, zero-length args and args containing whitespace or
+ quote chars need to be wrapped in double quotes - for this to work,
+ embedded quotes need to be escaped as well. The aim is to ensure
+ the child process reconstructs the argv array we start with
+ exactly, so we treat quotes at the beginning and end of arguments
+ as embedded quotes.
+
+ The w32 GNU-based library from Cygnus doubles quotes to escape
+ them, while MSVC uses backslash for escaping. (Actually the MSVC
+ startup code does attempt to recognise doubled quotes and accept
+ them, but gets it wrong and ends up requiring three quotes to get a
+ single embedded quote!) So by default we decide whether to use
+ quote or backslash as the escape character based on whether the
+ binary is apparently a Cygnus compiled app.
+
+ Note that using backslash to escape embedded quotes requires
+ additional special handling if an embedded quote is already
+ preceeded by backslash, or if an arg requiring quoting ends with
+ backslash. In such cases, the run of escape characters needs to be
+ doubled. For consistency, we apply this special handling as long
+ as the escape character is not quote.
+
+ Since we have no idea how large argv and envp are likely to be we
+ figure out list lengths on the fly and allocate them. */
+
+ if (!NILP (Vw32_quote_process_args))
+ {
+ do_quoting = 1;
+ /* Override escape char by binding w32-quote-process-args to
+ desired character, or use t for auto-selection. */
+ if (INTEGERP (Vw32_quote_process_args))
+ escape_char = XINT (Vw32_quote_process_args);
+ else
+ escape_char = is_cygnus_app ? '"' : '\\';
+ }
/* do argv... */
arglen = 0;
targ = argv;
while (*targ)
{
+ char * p = *targ;
+ int need_quotes = 0;
+ int escape_char_run = 0;
+
+ if (*p == 0)
+ need_quotes = 1;
+ for ( ; *p; p++)
+ {
+ if (*p == '"')
+ {
+ /* allow for embedded quotes to be escaped */
+ arglen++;
+ need_quotes = 1;
+ /* handle the case where the embedded quote is already escaped */
+ if (escape_char_run > 0)
+ {
+ /* To preserve the arg exactly, we need to double the
+ preceding escape characters (plus adding one to
+ escape the quote character itself). */
+ arglen += escape_char_run;
+ }
+ }
+ else if (*p == ' ' || *p == '\t')
+ {
+ need_quotes = 1;
+ }
+
+ if (*p == escape_char && escape_char != '"')
+ escape_char_run++;
+ else
+ escape_char_run = 0;
+ }
+ if (need_quotes)
+ {
+ arglen += 2;
+ /* handle the case where the arg ends with an escape char - we
+ must not let the enclosing quote be escaped. */
+ if (escape_char_run > 0)
+ arglen += escape_char_run;
+ }
arglen += strlen (*targ++) + 1;
}
- cmdline = malloc (arglen);
- if (cmdline == NULL)
- {
- errno = ENOMEM;
- goto EH_Fail;
- }
+ cmdline = alloca (arglen);
targ = argv;
parg = cmdline;
while (*targ)
{
- strcpy (parg, *targ);
- parg += strlen (*targ++);
+ char * p = *targ;
+ int need_quotes = 0;
+
+ if (*p == 0)
+ need_quotes = 1;
+
+ if (do_quoting)
+ {
+ for ( ; *p; p++)
+ if (*p == ' ' || *p == '\t' || *p == '"')
+ need_quotes = 1;
+ }
+ if (need_quotes)
+ {
+ int escape_char_run = 0;
+ char * first;
+ char * last;
+
+ p = *targ;
+ first = p;
+ last = p + strlen (p) - 1;
+ *parg++ = '"';
+#if 0
+ /* This version does not escape quotes if they occur at the
+ beginning or end of the arg - this could lead to incorrect
+ behaviour when the arg itself represents a command line
+ containing quoted args. I believe this was originally done
+ as a hack to make some things work, before
+ `w32-quote-process-args' was added. */
+ while (*p)
+ {
+ if (*p == '"' && p > first && p < last)
+ *parg++ = escape_char; /* escape embedded quotes */
+ *parg++ = *p++;
+ }
+#else
+ for ( ; *p; p++)
+ {
+ if (*p == '"')
+ {
+ /* double preceding escape chars if any */
+ while (escape_char_run > 0)
+ {
+ *parg++ = escape_char;
+ escape_char_run--;
+ }
+ /* escape all quote chars, even at beginning or end */
+ *parg++ = escape_char;
+ }
+ *parg++ = *p;
+
+ if (*p == escape_char && escape_char != '"')
+ escape_char_run++;
+ else
+ escape_char_run = 0;
+ }
+ /* double escape chars before enclosing quote */
+ while (escape_char_run > 0)
+ {
+ *parg++ = escape_char;
+ escape_char_run--;
+ }
+#endif
+ *parg++ = '"';
+ }
+ else
+ {
+ strcpy (parg, *targ);
+ parg += strlen (*targ);
+ }
*parg++ = ' ';
+ targ++;
}
*--parg = '\0';
/* and envp... */
arglen = 1;
targ = envp;
+ numenv = 1; /* for end null */
while (*targ)
{
arglen += strlen (*targ++) + 1;
+ numenv++;
}
- sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
+ /* extra env vars... */
+ sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d",
GetCurrentProcessId ());
arglen += strlen (ppid_env_var_buffer) + 1;
+ numenv++;
- env = malloc (arglen);
- if (env == NULL)
- {
- errno = ENOMEM;
- goto EH_cmdline;
- }
- targ = envp;
+ /* merge env passed in and extra env into one, and sort it. */
+ targ = (char **) alloca (numenv * sizeof (char *));
+ merge_and_sort_env (envp, extra_env, targ);
+
+ /* concatenate env entries. */
+ env = alloca (arglen);
parg = env;
while (*targ)
{
parg += strlen (*targ++);
*parg++ = '\0';
}
- strcpy (parg, ppid_env_var_buffer);
- parg += strlen (ppid_env_var_buffer);
*parg++ = '\0';
*parg = '\0';
+
+ cp = new_child ();
+ if (cp == NULL)
+ {
+ errno = EAGAIN;
+ return -1;
+ }
/* Now create the process. */
- if (!create_child (cmdname, cmdline, env, &pi))
+ if (!create_child (cmdname, cmdline, env, &pid, cp))
{
+ delete_child (cp);
errno = ENOEXEC;
- goto EH_env;
+ return -1;
}
- return pi.dwProcessId;
-
- EH_env:
- free (env);
- EH_cmdline:
- free (cmdline);
- EH_Fail:
- return -1;
+ return pid;
}
/* Emulate the select call
Wait for available input on any of the given rfds, or timeout if
a timeout is given and no input is detected
- wfds and efds are not supported and must be NULL. */
+ wfds and efds are not supported and must be NULL.
+
+ For simplicity, we detect the death of child processes here and
+ synchronously call the SIGCHLD handler. Since it is possible for
+ children to be created without a corresponding pipe handle from which
+ to read output, we wait separately on the process handles as well as
+ the char_avail events for each process pipe. We only call
+ wait/reap_process when the process actually terminates.
+
+ To reduce the number of places in which Emacs can be hung such that
+ C-g is not able to interrupt it, we always wait on interrupt_handle
+ (which is signalled by the input thread when C-g is detected). If we
+ detect that we were woken up by C-g, we return -1 with errno set to
+ EINTR as on Unix. */
/* From ntterm.c */
extern HANDLE keyboard_handle;
+
+/* From w32xfns.c */
+extern HANDLE interrupt_handle;
+
/* From process.c */
extern int proc_buffered_char[];
EMACS_TIME *timeout)
{
SELECT_TYPE orfds;
- DWORD timeout_ms;
- int i, nh, nr;
+ DWORD timeout_ms, start_time;
+ int i, nh, nc, nr;
DWORD active;
child_process *cp, *cps[MAX_CHILDREN];
- HANDLE wait_hnd[MAX_CHILDREN];
+ HANDLE wait_hnd[MAXDESC + MAX_CHILDREN];
+ int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */
+ timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE;
+
/* If the descriptor sets are NULL but timeout isn't, then just Sleep. */
if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL)
{
-#ifdef HAVE_TIMEVAL
- Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
-#else
- Sleep ((*timeout) * 1000);
-#endif
+ Sleep (timeout_ms);
return 0;
}
orfds = *rfds;
FD_ZERO (rfds);
nr = 0;
+
+ /* Always wait on interrupt_handle, to detect C-g (quit). */
+ wait_hnd[0] = interrupt_handle;
+ fdindex[0] = -1;
- /* Build a list of handles to wait on. */
- nh = 0;
+ /* Build a list of pipe handles to wait on. */
+ nh = 1;
for (i = 0; i < nfds; i++)
if (FD_ISSET (i, &orfds))
{
if (i == 0)
{
- /* Handle stdin specially */
- wait_hnd[nh] = keyboard_handle;
- cps[nh] = NULL;
- nh++;
+ if (keyboard_handle)
+ {
+ /* Handle stdin specially */
+ wait_hnd[nh] = keyboard_handle;
+ fdindex[nh] = i;
+ nh++;
+ }
/* Check for any emacs-generated input in the queue since
it won't be detected in the wait */
if (detect_input_pending ())
{
FD_SET (i, rfds);
- nr++;
+ return 1;
}
}
else
{
- /* Child process input */
- cp = find_child_fd (i);
+ /* Child process and socket input */
+ cp = fd_info[i].cp;
if (cp)
{
+ int current_status = cp->status;
+
+ if (current_status == STATUS_READ_ACKNOWLEDGED)
+ {
+ /* Tell reader thread which file handle to use. */
+ cp->fd = i;
+ /* Wake up the reader thread for this process */
+ cp->status = STATUS_READ_READY;
+ if (!SetEvent (cp->char_consumed))
+ DebPrint (("nt_select.SetEvent failed with "
+ "%lu for fd %ld\n", GetLastError (), i));
+ }
+
+#ifdef CHECK_INTERLOCK
+ /* slightly crude cross-checking of interlock between threads */
+
+ current_status = cp->status;
+ if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0)
+ {
+ /* char_avail has been signalled, so status (which may
+ have changed) should indicate read has completed
+ but has not been acknowledged. */
+ current_status = cp->status;
+ if (current_status != STATUS_READ_SUCCEEDED
+ && current_status != STATUS_READ_FAILED)
+ DebPrint (("char_avail set, but read not completed: status %d\n",
+ current_status));
+ }
+ else
+ {
+ /* char_avail has not been signalled, so status should
+ indicate that read is in progress; small possibility
+ that read has completed but event wasn't yet signalled
+ when we tested it (because a context switch occurred
+ or if running on separate CPUs). */
+ if (current_status != STATUS_READ_READY
+ && current_status != STATUS_READ_IN_PROGRESS
+ && current_status != STATUS_READ_SUCCEEDED
+ && current_status != STATUS_READ_FAILED)
+ DebPrint (("char_avail reset, but read status is bad: %d\n",
+ current_status));
+ }
+#endif
+ wait_hnd[nh] = cp->char_avail;
+ fdindex[nh] = i;
+ if (!wait_hnd[nh]) abort ();
+ nh++;
#ifdef FULL_DEBUG
DebPrint (("select waiting on child %d fd %d\n",
cp-child_procs, i));
#endif
- wait_hnd[nh] = cp->char_avail;
- cps[nh] = cp;
- nh++;
}
else
{
- /* Unable to find something to wait on for this fd, fail */
- DebPrint (("select unable to find child process "
- "for fd %ld\n", i));
- nh = 0;
- break;
+ /* Unable to find something to wait on for this fd, skip */
+
+ /* Note that this is not a fatal error, and can in fact
+ happen in unusual circumstances. Specifically, if
+ sys_spawnve fails, eg. because the program doesn't
+ exist, and debug-on-error is t so Fsignal invokes a
+ nested input loop, then the process output pipe is
+ still included in input_wait_mask with no child_proc
+ associated with it. (It is removed when the debugger
+ exits the nested input loop and the error is thrown.) */
+
+ DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i));
}
}
}
+
+count_children:
+ /* Add handles of child processes. */
+ nc = 0;
+ for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--)
+ /* Some child_procs might be sockets; ignore them. Also some
+ children may have died already, but we haven't finished reading
+ the process output; ignore them too. */
+ if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess
+ && (cp->fd < 0
+ || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0
+ || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0)
+ )
+ {
+ wait_hnd[nh + nc] = cp->procinfo.hProcess;
+ cps[nc] = cp;
+ nc++;
+ }
/* Nothing to look for, so we didn't find anything */
- if (nh == 0)
+ if (nh + nc == 0)
{
if (timeout)
-#ifdef HAVE_TIMEVAL
- Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
-#else
- Sleep ((*timeout) * 1000);
-#endif
+ Sleep (timeout_ms);
return 0;
}
- /* Check for immediate return without waiting */
- if (nr > 0)
- return nr;
-
- /*
- Wait for input
- If a child process dies while this is waiting, its pipe will break
- so the reader thread will signal an error condition, thus, the wait
- will wake up
- */
-#ifdef HAVE_TIMEVAL
- timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE;
-#else
- timeout_ms = timeout ? *timeout*1000 : INFINITE;
-#endif
- active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms);
+ start_time = GetTickCount ();
+
+ /* Wait for input or child death to be signalled. If user input is
+ allowed, then also accept window messages. */
+ if (FD_ISSET (0, &orfds))
+ active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms,
+ QS_ALLINPUT);
+ else
+ active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms);
+
if (active == WAIT_FAILED)
{
DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n",
- nh, timeout_ms, GetLastError ()));
- /* Is there a better error? */
- errno = EBADF;
+ nh + nc, timeout_ms, GetLastError ()));
+ /* don't return EBADF - this causes wait_reading_process_input to
+ abort; WAIT_FAILED is returned when single-stepping under
+ Windows 95 after switching thread focus in debugger, and
+ possibly at other times. */
+ errno = EINTR;
return -1;
}
else if (active == WAIT_TIMEOUT)
{
return 0;
}
- else if (active >= WAIT_OBJECT_0 &&
- active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
+ else if (active >= WAIT_OBJECT_0
+ && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS)
{
active -= WAIT_OBJECT_0;
}
- else if (active >= WAIT_ABANDONED_0 &&
- active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
+ else if (active >= WAIT_ABANDONED_0
+ && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
{
active -= WAIT_ABANDONED_0;
}
-
- if (cps[active] == NULL)
- {
- /* Keyboard input available */
- FD_SET (0, rfds);
- nr++;
-
- /* This shouldn't be necessary, but apparently just setting the input
- fd is not good enough for emacs */
- read_input_waiting ();
- }
else
+ abort ();
+
+ /* Loop over all handles after active (now officially documented as
+ being the first signalled handle in the array). We do this to
+ ensure fairness, so that all channels with data available will be
+ processed - otherwise higher numbered channels could be starved. */
+ do
{
- /* Child process */
- cp = cps[active];
+ if (active == nh + nc)
+ {
+ /* There are messages in the lisp thread's queue; we must
+ drain the queue now to ensure they are processed promptly,
+ because if we don't do so, we will not be woken again until
+ further messages arrive.
- /* If status is FALSE the read failed so don't report input */
- if (cp->status)
- {
- FD_SET (cp->fd, rfds);
- proc_buffered_char[cp->fd] = cp->chr;
- nr++;
- }
- else
- {
- /* The SIGCHLD handler will do a Wait so we know it won't
- return until the process is dead
- We force Wait to only wait for this process to avoid it
- picking up other children that happen to be dead but that
- we haven't noticed yet
- SIG_DFL for SIGCHLD is ignore? */
- if (sig_handlers[SIGCHLD] != SIG_DFL &&
- sig_handlers[SIGCHLD] != SIG_IGN)
- {
+ NB. If ever we allow window message procedures to callback
+ into lisp, we will need to ensure messages are dispatched
+ at a safe time for lisp code to be run (*), and we may also
+ want to provide some hooks in the dispatch loop to cater
+ for modeless dialogs created by lisp (ie. to register
+ window handles to pass to IsDialogMessage).
+
+ (*) Note that MsgWaitForMultipleObjects above is an
+ internal dispatch point for messages that are sent to
+ windows created by this thread. */
+ drain_message_queue ();
+ }
+ else if (active >= nh)
+ {
+ cp = cps[active - nh];
+
+ /* We cannot always signal SIGCHLD immediately; if we have not
+ finished reading the process output, we must delay sending
+ SIGCHLD until we do. */
+
+ if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0)
+ fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD;
+ /* SIG_DFL for SIGCHLD is ignore */
+ else if (sig_handlers[SIGCHLD] != SIG_DFL &&
+ sig_handlers[SIGCHLD] != SIG_IGN)
+ {
#ifdef FULL_DEBUG
DebPrint (("select calling SIGCHLD handler for pid %d\n",
cp->pid));
#endif
dead_child = cp;
- sig_handlers[SIGCHLD](SIGCHLD);
+ sig_handlers[SIGCHLD] (SIGCHLD);
dead_child = NULL;
- }
-
- /* Clean up the child process entry in the table */
- remove_child (cp);
- }
+ }
+ }
+ else if (fdindex[active] == -1)
+ {
+ /* Quit (C-g) was detected. */
+ errno = EINTR;
+ return -1;
+ }
+ else if (fdindex[active] == 0)
+ {
+ /* Keyboard input available */
+ FD_SET (0, rfds);
+ nr++;
+ }
+ else
+ {
+ /* must be a socket or pipe - read ahead should have
+ completed, either succeeding or failing. */
+ FD_SET (fdindex[active], rfds);
+ nr++;
+ }
+
+ /* Even though wait_reading_process_output only reads from at most
+ one channel, we must process all channels here so that we reap
+ all children that have died. */
+ while (++active < nh + nc)
+ if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0)
+ break;
+ } while (active < nh + nc);
+
+ /* If no input has arrived and timeout hasn't expired, wait again. */
+ if (nr == 0)
+ {
+ DWORD elapsed = GetTickCount () - start_time;
+
+ if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */
+ {
+ if (timeout_ms != INFINITE)
+ timeout_ms -= elapsed;
+ goto count_children;
+ }
}
+
return nr;
}
-/*
- Substitute for certain kill () operations
- */
+/* Substitute for certain kill () operations */
+
+static BOOL CALLBACK
+find_child_console (HWND hwnd, child_process * cp)
+{
+ DWORD thread_id;
+ DWORD process_id;
+
+ thread_id = GetWindowThreadProcessId (hwnd, &process_id);
+ if (process_id == cp->procinfo.dwProcessId)
+ {
+ char window_class[32];
+
+ GetClassName (hwnd, window_class, sizeof (window_class));
+ if (strcmp (window_class,
+ (os_subtype == OS_WIN95)
+ ? "tty"
+ : "ConsoleWindowClass") == 0)
+ {
+ cp->hwnd = hwnd;
+ return FALSE;
+ }
+ }
+ /* keep looking */
+ return TRUE;
+}
+
int
-win32_kill_process (int pid, int sig)
+sys_kill (int pid, int sig)
{
child_process *cp;
+ HANDLE proc_hand;
+ int need_to_free = 0;
+ int rc = 0;
/* Only handle signals that will result in the process dying */
if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP)
errno = EINVAL;
return -1;
}
-
+
cp = find_child_pid (pid);
if (cp == NULL)
{
- DebPrint (("win32_kill_process didn't find a child with pid %lu\n", pid));
- errno = ECHILD;
- return -1;
+ proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid);
+ if (proc_hand == NULL)
+ {
+ errno = EPERM;
+ return -1;
+ }
+ need_to_free = 1;
+ }
+ else
+ {
+ proc_hand = cp->procinfo.hProcess;
+ pid = cp->procinfo.dwProcessId;
+
+ /* Try to locate console window for process. */
+ EnumWindows (find_child_console, (LPARAM) cp);
}
if (sig == SIGINT)
{
- /* Fake Ctrl-Break. */
- if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
+ if (NILP (Vw32_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))
{
- DebPrint (("win32_kill_process.GenerateConsoleCtrlEvent return %d "
+ DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
"for pid %lu\n", GetLastError (), pid));
errno = EINVAL;
- return -1;
- }
+ rc = -1;
+ }
}
else
{
- /* Kill the process. On Win32 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. */
- if (!TerminateProcess (cp->process, 0xff))
+ if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd)
+ {
+#if 1
+ if (os_subtype == OS_WIN95)
+ {
+/*
+ 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 (proc_hand, 0xff))
+ {
+ DebPrint (("sys_kill.TerminateProcess returned %d "
+ "for pid %lu\n", GetLastError (), pid));
+ errno = EINVAL;
+ rc = -1;
+ }
+ }
+ 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 (proc_hand, 0xff))
{
- DebPrint (("win32_kill_process.TerminateProcess returned %d "
+ DebPrint (("sys_kill.TerminateProcess returned %d "
"for pid %lu\n", GetLastError (), pid));
errno = EINVAL;
- return -1;
+ rc = -1;
}
}
- return 0;
+
+ if (need_to_free)
+ CloseHandle (proc_hand);
+
+ return rc;
}
-/* If the channel is a pipe this read might block since we don't
- know how many characters are available, so check and read only
- what's there
- We also need to wake up the reader thread once we've read our data. */
-int
-read_child_output (int fd, char *buf, int max)
+/* extern int report_file_error (char *, Lisp_Object); */
+
+/* The following two routines are used to manipulate stdin, stdout, and
+ stderr of our child processes.
+
+ Assuming that in, out, and err are *not* inheritable, we make them
+ stdin, stdout, and stderr of the child as follows:
+
+ - Save the parent's current standard handles.
+ - Set the std handles to inheritable duplicates of the ones being passed in.
+ (Note that _get_osfhandle() is an io.h procedure that retrieves the
+ NT file handle for a crt file descriptor.)
+ - Spawn the child, which inherits in, out, and err as stdin,
+ stdout, and stderr. (see Spawnve)
+ - Close the std handles passed to the child.
+ - Reset the parent's standard handles to the saved handles.
+ (see reset_standard_handles)
+ We assume that the caller closes in, out, and err after calling us. */
+
+void
+prepare_standard_handles (int in, int out, int err, HANDLE handles[3])
{
- HANDLE h;
- int to_read, nchars;
- DWORD waiting;
- child_process *cp;
+ HANDLE parent;
+ HANDLE newstdin, newstdout, newstderr;
+
+ parent = GetCurrentProcess ();
+
+ handles[0] = GetStdHandle (STD_INPUT_HANDLE);
+ handles[1] = GetStdHandle (STD_OUTPUT_HANDLE);
+ handles[2] = GetStdHandle (STD_ERROR_HANDLE);
+
+ /* make inheritable copies of the new handles */
+ if (!DuplicateHandle (parent,
+ (HANDLE) _get_osfhandle (in),
+ parent,
+ &newstdin,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS))
+ report_file_error ("Duplicating input handle for child", Qnil);
+
+ if (!DuplicateHandle (parent,
+ (HANDLE) _get_osfhandle (out),
+ parent,
+ &newstdout,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS))
+ report_file_error ("Duplicating output handle for child", Qnil);
- h = (HANDLE)_get_osfhandle (fd);
- if (GetFileType (h) == FILE_TYPE_PIPE)
+ if (!DuplicateHandle (parent,
+ (HANDLE) _get_osfhandle (err),
+ parent,
+ &newstderr,
+ 0,
+ TRUE,
+ DUPLICATE_SAME_ACCESS))
+ report_file_error ("Duplicating error handle for child", Qnil);
+
+ /* and store them as our std handles */
+ if (!SetStdHandle (STD_INPUT_HANDLE, newstdin))
+ report_file_error ("Changing stdin handle", Qnil);
+
+ if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout))
+ report_file_error ("Changing stdout handle", Qnil);
+
+ if (!SetStdHandle (STD_ERROR_HANDLE, newstderr))
+ report_file_error ("Changing stderr handle", Qnil);
+}
+
+void
+reset_standard_handles (int in, int out, int err, HANDLE handles[3])
+{
+ /* close the duplicated handles passed to the child */
+ CloseHandle (GetStdHandle (STD_INPUT_HANDLE));
+ CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE));
+ CloseHandle (GetStdHandle (STD_ERROR_HANDLE));
+
+ /* now restore parent's saved std handles */
+ SetStdHandle (STD_INPUT_HANDLE, handles[0]);
+ SetStdHandle (STD_OUTPUT_HANDLE, handles[1]);
+ SetStdHandle (STD_ERROR_HANDLE, handles[2]);
+}
+
+void
+set_process_dir (char * dir)
+{
+ process_dir = dir;
+}
+
+#ifdef HAVE_SOCKETS
+
+/* To avoid problems with winsock implementations that work over dial-up
+ connections causing or requiring a connection to exist while Emacs is
+ running, Emacs no longer automatically loads winsock on startup if it
+ is present. Instead, it will be loaded when open-network-stream is
+ first called.
+
+ To allow full control over when winsock is loaded, we provide these
+ two functions to dynamically load and unload winsock. This allows
+ dial-up users to only be connected when they actually need to use
+ socket services. */
+
+/* From nt.c */
+extern HANDLE winsock_lib;
+extern BOOL term_winsock (void);
+extern BOOL init_winsock (int load_now);
+
+extern Lisp_Object Vsystem_name;
+
+DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0,
+ "Test for presence of the Windows socket library `winsock'.\n\
+Returns non-nil if winsock support is present, nil otherwise.\n\
+\n\
+If the optional argument LOAD-NOW is non-nil, the winsock library is\n\
+also loaded immediately if not already loaded. If winsock is loaded,\n\
+the winsock local hostname is returned (since this may be different from\n\
+the value of `system-name' and should supplant it), otherwise t is\n\
+returned to indicate winsock support is present.")
+ (load_now)
+ Lisp_Object load_now;
+{
+ int have_winsock;
+
+ have_winsock = init_winsock (!NILP (load_now));
+ if (have_winsock)
{
- PeekNamedPipe (h, NULL, 0, NULL, &waiting, NULL);
- to_read = min (waiting, (DWORD)max);
+ if (winsock_lib != NULL)
+ {
+ /* Return new value for system-name. The best way to do this
+ is to call init_system_name, saving and restoring the
+ original value to avoid side-effects. */
+ Lisp_Object orig_hostname = Vsystem_name;
+ Lisp_Object hostname;
+
+ init_system_name ();
+ hostname = Vsystem_name;
+ Vsystem_name = orig_hostname;
+ return hostname;
+ }
+ return Qt;
}
- else
- to_read = max;
+ return Qnil;
+}
+
+DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock,
+ 0, 0, 0,
+ "Unload the Windows socket library `winsock' if loaded.\n\
+This is provided to allow dial-up socket connections to be disconnected\n\
+when no longer needed. Returns nil without unloading winsock if any\n\
+socket connections still exist.")
+ ()
+{
+ return term_winsock () ? Qt : Qnil;
+}
+
+#endif /* HAVE_SOCKETS */
+
+\f
+/* Some miscellaneous functions that are Windows specific, but not GUI
+ specific (ie. are applicable in terminal or batch mode as well). */
+
+/* lifted from fileio.c */
+#define CORRECT_DIR_SEPS(s) \
+ do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
+ else unixtodos_filename (s); \
+ } while (0)
+
+DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0,
+ "Return the short file name version (8.3) of the full path of FILENAME.\n\
+If FILENAME does not exist, return nil.\n\
+All path elements in FILENAME are converted to their short names.")
+ (filename)
+ Lisp_Object filename;
+{
+ char shortname[MAX_PATH];
+
+ CHECK_STRING (filename, 0);
+
+ /* first expand it. */
+ filename = Fexpand_file_name (filename, Qnil);
+
+ /* luckily, this returns the short version of each element in the path. */
+ if (GetShortPathName (XSTRING (filename)->data, shortname, MAX_PATH) == 0)
+ return Qnil;
+
+ CORRECT_DIR_SEPS (shortname);
+
+ return build_string (shortname);
+}
+
+
+DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name,
+ 1, 1, 0,
+ "Return the long file name version of the full path of FILENAME.\n\
+If FILENAME does not exist, return nil.\n\
+All path elements in FILENAME are converted to their long names.")
+ (filename)
+ Lisp_Object filename;
+{
+ char longname[ MAX_PATH ];
+
+ CHECK_STRING (filename, 0);
+
+ /* first expand it. */
+ filename = Fexpand_file_name (filename, Qnil);
+
+ if (!w32_get_long_filename (XSTRING (filename)->data, longname, MAX_PATH))
+ return Qnil;
+
+ CORRECT_DIR_SEPS (longname);
+
+ return build_string (longname);
+}
+
+DEFUN ("w32-set-process-priority", Fw32_set_process_priority, Sw32_set_process_priority,
+ 2, 2, 0,
+ "Set the priority of PROCESS to PRIORITY.\n\
+If PROCESS is nil, the priority of Emacs is changed, otherwise the\n\
+priority of the process whose pid is PROCESS is changed.\n\
+PRIORITY should be one of the symbols high, normal, or low;\n\
+any other symbol will be interpreted as normal.\n\
+\n\
+If successful, the return value is t, otherwise nil.")
+ (process, priority)
+ Lisp_Object process, priority;
+{
+ HANDLE proc_handle = GetCurrentProcess ();
+ DWORD priority_class = NORMAL_PRIORITY_CLASS;
+ Lisp_Object result = Qnil;
+
+ CHECK_SYMBOL (priority, 0);
+
+ if (!NILP (process))
+ {
+ DWORD pid;
+ child_process *cp;
+
+ CHECK_NUMBER (process, 0);
+
+ /* Allow pid to be an internally generated one, or one obtained
+ externally. This is necessary because real pids on Win95 are
+ negative. */
+
+ pid = XINT (process);
+ cp = find_child_pid (pid);
+ if (cp != NULL)
+ pid = cp->procinfo.dwProcessId;
+
+ proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid);
+ }
+
+ if (EQ (priority, Qhigh))
+ priority_class = HIGH_PRIORITY_CLASS;
+ else if (EQ (priority, Qlow))
+ priority_class = IDLE_PRIORITY_CLASS;
+
+ if (proc_handle != NULL)
+ {
+ if (SetPriorityClass (proc_handle, priority_class))
+ result = Qt;
+ if (!NILP (process))
+ CloseHandle (proc_handle);
+ }
+
+ return result;
+}
+
+
+DEFUN ("w32-get-locale-info", Fw32_get_locale_info, Sw32_get_locale_info, 1, 2, 0,
+ "Return information about the Windows locale LCID.\n\
+By default, return a three letter locale code which encodes the default\n\
+language as the first two characters, and the country or regionial variant\n\
+as the third letter. For example, ENU refers to `English (United States)',\n\
+while ENC means `English (Canadian)'.\n\
+\n\
+If the optional argument LONGFORM is t, the long form of the locale\n\
+name is returned, e.g. `English (United States)' instead; if LONGFORM\n\
+is a number, it is interpreted as an LCTYPE constant and the corresponding\n\
+locale information is returned.\n\
+\n\
+If LCID (a 16-bit number) is not a valid locale, the result is nil.")
+ (lcid, longform)
+ Lisp_Object lcid, longform;
+{
+ int got_abbrev;
+ int got_full;
+ char abbrev_name[32] = { 0 };
+ char full_name[256] = { 0 };
+
+ CHECK_NUMBER (lcid, 0);
+
+ if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
+ return Qnil;
+
+ if (NILP (longform))
+ {
+ got_abbrev = GetLocaleInfo (XINT (lcid),
+ LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
+ abbrev_name, sizeof (abbrev_name));
+ if (got_abbrev)
+ return build_string (abbrev_name);
+ }
+ else if (EQ (longform, Qt))
+ {
+ got_full = GetLocaleInfo (XINT (lcid),
+ LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP,
+ full_name, sizeof (full_name));
+ if (got_full)
+ return build_string (full_name);
+ }
+ else if (NUMBERP (longform))
+ {
+ got_full = GetLocaleInfo (XINT (lcid),
+ XINT (longform),
+ full_name, sizeof (full_name));
+ if (got_full)
+ return make_unibyte_string (full_name, got_full);
+ }
+
+ return Qnil;
+}
+
+
+DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, Sw32_get_current_locale_id, 0, 0, 0,
+ "Return Windows locale id for current locale setting.\n\
+This is a numerical value; use `w32-get-locale-info' to convert to a\n\
+human-readable form.")
+ ()
+{
+ return make_number (GetThreadLocale ());
+}
+
+DWORD int_from_hex (char * s)
+{
+ DWORD val = 0;
+ static char hex[] = "0123456789abcdefABCDEF";
+ char * p;
+
+ while (*s && (p = strchr(hex, *s)) != NULL)
+ {
+ unsigned digit = p - hex;
+ if (digit > 15)
+ digit -= 6;
+ val = val * 16 + digit;
+ s++;
+ }
+ return val;
+}
+
+/* We need to build a global list, since the EnumSystemLocale callback
+ function isn't given a context pointer. */
+Lisp_Object Vw32_valid_locale_ids;
+
+BOOL CALLBACK enum_locale_fn (LPTSTR localeNum)
+{
+ DWORD id = int_from_hex (localeNum);
+ Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids);
+ return TRUE;
+}
+
+DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, Sw32_get_valid_locale_ids, 0, 0, 0,
+ "Return list of all valid Windows locale ids.\n\
+Each id is a numerical value; use `w32-get-locale-info' to convert to a\n\
+human-readable form.")
+ ()
+{
+ Vw32_valid_locale_ids = Qnil;
+
+ EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED);
+
+ Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids);
+ return Vw32_valid_locale_ids;
+}
+
+
+DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0,
+ "Return Windows locale id for default locale setting.\n\
+By default, the system default locale setting is returned; if the optional\n\
+parameter USERP is non-nil, the user default locale setting is returned.\n\
+This is a numerical value; use `w32-get-locale-info' to convert to a\n\
+human-readable form.")
+ (userp)
+ Lisp_Object userp;
+{
+ if (NILP (userp))
+ return make_number (GetSystemDefaultLCID ());
+ return make_number (GetUserDefaultLCID ());
+}
+
+
+DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0,
+ "Make Windows locale LCID be the current locale setting for Emacs.\n\
+If successful, the new locale id is returned, otherwise nil.")
+ (lcid)
+ Lisp_Object lcid;
+{
+ CHECK_NUMBER (lcid, 0);
+
+ if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
+ return Qnil;
+
+ if (!SetThreadLocale (XINT (lcid)))
+ return Qnil;
+
+ /* Need to set input thread locale if present. */
+ if (dwWindowsThreadId)
+ /* Reply is not needed. */
+ PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0);
+
+ return make_number (GetThreadLocale ());
+}
+
+
+/* We need to build a global list, since the EnumCodePages callback
+ function isn't given a context pointer. */
+Lisp_Object Vw32_valid_codepages;
+
+BOOL CALLBACK enum_codepage_fn (LPTSTR codepageNum)
+{
+ DWORD id = atoi (codepageNum);
+ Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages);
+ return TRUE;
+}
+
+DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, Sw32_get_valid_codepages, 0, 0, 0,
+ "Return list of all valid Windows codepages.")
+ ()
+{
+ Vw32_valid_codepages = Qnil;
+
+ EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED);
+
+ Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages);
+ return Vw32_valid_codepages;
+}
+
+
+DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, Sw32_get_console_codepage, 0, 0, 0,
+ "Return current Windows codepage for console input.")
+ ()
+{
+ return make_number (GetConsoleCP ());
+}
+
- /* Use read to get CRLF translation */
- nchars = read (fd, buf, to_read);
+DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, Sw32_set_console_codepage, 1, 1, 0,
+ "Make Windows codepage CP be the current codepage setting for Emacs.\n\
+The codepage setting affects keyboard input and display in tty mode.\n\
+If successful, the new CP is returned, otherwise nil.")
+ (cp)
+ Lisp_Object cp;
+{
+ CHECK_NUMBER (cp, 0);
+
+ if (!IsValidCodePage (XINT (cp)))
+ return Qnil;
+
+ if (!SetConsoleCP (XINT (cp)))
+ return Qnil;
+
+ return make_number (GetConsoleCP ());
+}
+
+
+DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, Sw32_get_console_output_codepage, 0, 0, 0,
+ "Return current Windows codepage for console output.")
+ ()
+{
+ return make_number (GetConsoleOutputCP ());
+}
+
- if (GetFileType (h) == FILE_TYPE_PIPE)
+DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, Sw32_set_console_output_codepage, 1, 1, 0,
+ "Make Windows codepage CP be the current codepage setting for Emacs.\n\
+The codepage setting affects keyboard input and display in tty mode.\n\
+If successful, the new CP is returned, otherwise nil.")
+ (cp)
+ Lisp_Object cp;
+{
+ CHECK_NUMBER (cp, 0);
+
+ if (!IsValidCodePage (XINT (cp)))
+ return Qnil;
+
+ if (!SetConsoleOutputCP (XINT (cp)))
+ return Qnil;
+
+ return make_number (GetConsoleOutputCP ());
+}
+
+
+DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, Sw32_get_codepage_charset, 1, 1, 0,
+ "Return charset of codepage CP.\n\
+Returns nil if the codepage is not valid.")
+ (cp)
+ Lisp_Object cp;
+{
+ CHARSETINFO info;
+
+ CHECK_NUMBER (cp, 0);
+
+ if (!IsValidCodePage (XINT (cp)))
+ return Qnil;
+
+ if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE))
+ return make_number (info.ciCharset);
+
+ return Qnil;
+}
+
+
+DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, Sw32_get_valid_keyboard_layouts, 0, 0, 0,
+ "Return list of Windows keyboard languages and layouts.\n\
+The return value is a list of pairs of language id and layout id.")
+ ()
+{
+ int num_layouts = GetKeyboardLayoutList (0, NULL);
+ HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL));
+ Lisp_Object obj = Qnil;
+
+ if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts)
{
- /* Wake up the reader thread
- for this process */
- cp = find_child_fd (fd);
- if (cp)
- {
- if (!SetEvent (cp->char_consumed))
- DebPrint (("read_child_output.SetEvent failed with "
- "%lu for fd %ld\n", GetLastError (), fd));
- }
- else
- DebPrint (("read_child_output couldn't find a child with fd %d\n",
- fd));
+ while (--num_layouts >= 0)
+ {
+ DWORD kl = (DWORD) layouts[num_layouts];
+
+ obj = Fcons (Fcons (make_number (kl & 0xffff),
+ make_number ((kl >> 16) & 0xffff)),
+ obj);
+ }
}
+
+ return obj;
+}
+
+
+DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, Sw32_get_keyboard_layout, 0, 0, 0,
+ "Return current Windows keyboard language and layout.\n\
+The return value is the cons of the language id and the layout id.")
+ ()
+{
+ DWORD kl = (DWORD) GetKeyboardLayout (dwWindowsThreadId);
+
+ return Fcons (make_number (kl & 0xffff),
+ make_number ((kl >> 16) & 0xffff));
+}
+
- return nchars;
+DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, Sw32_set_keyboard_layout, 1, 1, 0,
+ "Make LAYOUT be the current keyboard layout for Emacs.\n\
+The keyboard layout setting affects interpretation of keyboard input.\n\
+If successful, the new layout id is returned, otherwise nil.")
+ (layout)
+ Lisp_Object layout;
+{
+ DWORD kl;
+
+ CHECK_CONS (layout, 0);
+ CHECK_NUMBER (XCAR (layout), 0);
+ CHECK_NUMBER (XCDR (layout), 0);
+
+ kl = (XINT (XCAR (layout)) & 0xffff)
+ | (XINT (XCDR (layout)) << 16);
+
+ /* Synchronize layout with input thread. */
+ if (dwWindowsThreadId)
+ {
+ if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT,
+ (WPARAM) kl, 0))
+ {
+ MSG msg;
+ GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE);
+
+ if (msg.wParam == 0)
+ return Qnil;
+ }
+ }
+ else if (!ActivateKeyboardLayout ((HKL) kl, 0))
+ return Qnil;
+
+ return Fw32_get_keyboard_layout ();
+}
+
+\f
+syms_of_ntproc ()
+{
+ Qhigh = intern ("high");
+ Qlow = intern ("low");
+
+#ifdef HAVE_SOCKETS
+ defsubr (&Sw32_has_winsock);
+ defsubr (&Sw32_unload_winsock);
+#endif
+ defsubr (&Sw32_short_file_name);
+ defsubr (&Sw32_long_file_name);
+ defsubr (&Sw32_set_process_priority);
+ defsubr (&Sw32_get_locale_info);
+ defsubr (&Sw32_get_current_locale_id);
+ defsubr (&Sw32_get_default_locale_id);
+ defsubr (&Sw32_get_valid_locale_ids);
+ defsubr (&Sw32_set_current_locale);
+
+ defsubr (&Sw32_get_console_codepage);
+ defsubr (&Sw32_set_console_codepage);
+ defsubr (&Sw32_get_console_output_codepage);
+ defsubr (&Sw32_set_console_output_codepage);
+ defsubr (&Sw32_get_valid_codepages);
+ defsubr (&Sw32_get_codepage_charset);
+
+ defsubr (&Sw32_get_valid_keyboard_layouts);
+ defsubr (&Sw32_get_keyboard_layout);
+ defsubr (&Sw32_set_keyboard_layout);
+
+ DEFVAR_LISP ("w32-quote-process-args", &Vw32_quote_process_args,
+ "Non-nil enables quoting of process arguments to ensure correct parsing.\n\
+Because Windows does not directly pass argv arrays to child processes,\n\
+programs have to reconstruct the argv array by parsing the command\n\
+line string. For an argument to contain a space, it must be enclosed\n\
+in double quotes or it will be parsed as multiple arguments.\n\
+\n\
+If the value is a character, that character will be used to escape any\n\
+quote characters that appear, otherwise a suitable escape character\n\
+will be chosen based on the type of the program.");
+ Vw32_quote_process_args = Qt;
+
+ DEFVAR_LISP ("w32-start-process-show-window",
+ &Vw32_start_process_show_window,
+ "When nil, new child processes hide their windows.\n\
+When non-nil, they show their window in the method of their choice.");
+ Vw32_start_process_show_window = Qnil;
+
+ DEFVAR_LISP ("w32-start-process-share-console",
+ &Vw32_start_process_share_console,
+ "When nil, new child processes are given a new console.\n\
+When non-nil, they share the Emacs console; this has the limitation of\n\
+allowing only only DOS subprocess to run at a time (whether started directly\n\
+or indirectly by Emacs), and preventing Emacs from cleanly terminating the\n\
+subprocess group, but may allow Emacs to interrupt a subprocess that doesn't\n\
+otherwise respond to interrupts from Emacs.");
+ Vw32_start_process_share_console = Qnil;
+
+ DEFVAR_LISP ("w32-start-process-inherit-error-mode",
+ &Vw32_start_process_inherit_error_mode,
+ "When nil, new child processes revert to the default error mode.\n\
+When non-nil, they inherit their error mode setting from Emacs, which stops\n\
+them blocking when trying to access unmounted drives etc.");
+ Vw32_start_process_inherit_error_mode = Qt;
+
+ DEFVAR_INT ("w32-pipe-read-delay", &Vw32_pipe_read_delay,
+ "Forced delay before reading subprocess output.\n\
+This is done to improve the buffering of subprocess output, by\n\
+avoiding the inefficiency of frequently reading small amounts of data.\n\
+\n\
+If positive, the value is the number of milliseconds to sleep before\n\
+reading the subprocess output. If negative, the magnitude is the number\n\
+of time slices to wait (effectively boosting the priority of the child\n\
+process temporarily). A value of zero disables waiting entirely.");
+ Vw32_pipe_read_delay = 50;
+
+ DEFVAR_LISP ("w32-downcase-file-names", &Vw32_downcase_file_names,
+ "Non-nil means convert all-upper case file names to lower case.\n\
+This applies when performing completions and file name expansion.");
+ Vw32_downcase_file_names = Qnil;
+
+#if 0
+ DEFVAR_LISP ("w32-generate-fake-inodes", &Vw32_generate_fake_inodes,
+ "Non-nil means attempt to fake realistic inode values.\n\
+This works by hashing the truename of files, and should detect \n\
+aliasing between long and short (8.3 DOS) names, but can have\n\
+false positives because of hash collisions. Note that determing\n\
+the truename of a file can be slow.");
+ Vw32_generate_fake_inodes = Qnil;
+#endif
+
+ DEFVAR_LISP ("w32-get-true-file-attributes", &Vw32_get_true_file_attributes,
+ "Non-nil means determine accurate link count in file-attributes.\n\
+This option slows down file-attributes noticeably, so is disabled by\n\
+default. Note that it is only useful for files on NTFS volumes,\n\
+where hard links are supported.");
+ Vw32_get_true_file_attributes = Qnil;
}
+/* end of ntproc.c */
HCoop / bpt / emacs.git / blobdiff