xemacs-beta: src/ntproc.c comparison

comparison src/ntproc.c @ 209:41ff10fd062f r20-4b3

Import from CVS: tag r20-4b3

author	cvs
date	Mon, 13 Aug 2007 10:04:58 +0200
parents	9b50b4588a93
children	2c611d1463a6

comparison

equal deleted inserted replaced

-:f427b8ec4379
+:41ff10fd062f
 Drew Bliss                   Oct 14, 1993
 Adapted from alarm.c by Tim Fleehart */
 /* Adapted for XEmacs by David Hobley <david@spook-le0.cia.com.au> */
+/* Synced with FSF Emacs 19.34.6 by Marc Paquette <marcpa@cam.org> */
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <io.h>
 #include <windows.h>
 #include "lisp.h"
 #include "nt.h"
+#include "ntheap.h" /* From 19.34.6 */
 #include "systime.h"
 #include "syswait.h"
 #include "process.h"
+/*#include "w32term.h"*/ /* From 19.34.6: sync in ? --marcpa */
 /* 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 Vwin32_quote_process_args;
+/* Control whether create_child causes the process' window to be
+hidden.  The default is nil. */
+Lisp_Object Vwin32_start_process_show_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 Vwin32_start_process_share_console;
 /* 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 Win32 processes on both Win95 and NT as well.  */
 Lisp_Object Vwin32_pipe_read_delay;
 /* Control conversion of upper case file names to lower case.
 nil means no, t means yes. */
 Lisp_Object Vwin32_downcase_file_names;
-/* Keep track of whether we have already started a DOS program. */
+/* Control whether stat() attempts to generate fake but hopefully
-BOOL dos_process_running;
+"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 Vwin32_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 Vwin32_get_true_file_attributes;
+Lisp_Object Qhigh, Qlow;
 #ifndef SYS_SIGLIST_DECLARED
 extern char *sys_siglist[];
 #endif
 }
 }
 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,
 	      int * pPid, child_process *cp)
 {
 STARTUPINFO start;
 SECURITY_ATTRIBUTES sec_attrs;
 SECURITY_DESCRIPTOR sec_desc;
+char dir[ MAXPATHLEN ];
 if (cp == NULL) abort ();
 memset (&start, 0, sizeof (start));
 start.cb = sizeof (start);
 #ifdef HAVE_NTGUI
+if (NILP (Vwin32_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);
 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);
 if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE,
-		      CREATE_NEW_PROCESS_GROUP,
+		      (!NILP (Vwin32_start_process_share_console)
-		      env, NULL,
+		       ? CREATE_NEW_PROCESS_GROUP
+		       : CREATE_NEW_CONSOLE),
+		      env, dir,
 		      &start, &cp->procinfo))
 goto EH_Fail;
 cp->pid = (int) cp->procinfo.dwProcessId;
 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;
 		   "with %lu for fd %ld\n", GetLastError (), cp->fd));
 CloseHandle (cp->procinfo.hProcess);
 cp->procinfo.hProcess = NULL;
 CloseHandle (cp->procinfo.hThread);
 cp->procinfo.hThread = NULL;
-/* If this was a DOS process, indicate that it is now safe to
-	 start a new one.  */
-if (cp->is_dos_process)
-	dos_process_running = FALSE;
 }
 /* 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
 /* We want to wait for a specific child */
 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--)
 	/* some child_procs might be sockets; ignore them */
 	if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess)
 	  {
 	    wait_hnd[nh] = cp->procinfo.hProcess;
 	    cps[nh] = cp;
-	    if (!wait_hnd[nh]) abort ();
+	    if (!wait_hnd[nh]) abort (); /* Sync with FSF Emacs 19.34.6 note: only in XEmacs */
 	    nh++;
 	  }
 }
 if (nh == 0)
 /* Nothing to wait on, so fail */
 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)
 {
 active -= WAIT_OBJECT_0;
 }
 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",
 		 GetLastError ()));
 retval = 1;
 	}
 reap_subprocess (cp);
 }
+reap_subprocess (cp);
 return pid;
 }
-int
+void
-win32_is_dos_binary (char * filename)
+win32_executable_type (char * filename, int * is_dos_app, int * is_cygnus_app)
 {
-IMAGE_DOS_HEADER dos_header;
+file_data executable;
-DWORD signature;
+char * p;
-int fd;
-int is_dos_binary = FALSE;
+/* Default values in case we can't tell for sure.  */
+*is_dos_app = FALSE;
-fd = open (filename, O_RDONLY | O_BINARY, 0);
+*is_cygnus_app = FALSE;
-if (fd >= 0)
-{
+if (!open_input_file (&executable, filename))
-char * p = strrchr (filename, '.');
+return;
+p = strrchr (filename, '.');
 /* We can only identify DOS .com programs from the extension. */
 if (p && stricmp (p, ".com") == 0)
-	is_dos_binary = TRUE;
+*is_dos_app = TRUE;
-else if (p && stricmp (p, ".bat") == 0)
+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
+/* A DOS shell script - it appears that CreateProcess is happy to
-	     at COMSPEC to determine what executable to actually invoke.
+	 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. */
-	  p = getenv ("COMSPEC");
+/* Actually, I think it uses the program association for that
+	 extension, which is defined in the registry.  */
+p = egetenv ("COMSPEC");
 	  if (p)
-	    is_dos_binary = win32_is_dos_binary (p);
+	win32_executable_type (p, is_dos_app, is_cygnus_app);
 	}
 else
 	{
-	  /* Look for DOS .exe signature - if found, we must also check
+/* Look for DOS .exe signature - if found, we must also check that
-	     that it isn't really a 16- or 32-bit Windows exe, since
+	 it isn't really a 16- or 32-bit Windows exe, since both formats
-	     both formats start with a DOS program stub.  Note that
+	 start with a DOS program stub.  Note that 16-bit Windows
-	     16-bit Windows executables use the OS/2 1.x format. */
+	 executables use the OS/2 1.x format. */
-	  if (read (fd, &dos_header, sizeof (dos_header)) == sizeof (dos_header)
-	      && dos_header.e_magic == IMAGE_DOS_SIGNATURE
+IMAGE_DOS_HEADER * dos_header;
-	      && lseek (fd, dos_header.e_lfanew, SEEK_SET) != -1)
+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++)
 	    {
-	      if (read (fd, &signature, sizeof (signature)) != sizeof (signature)
+	      char * dllname = RVA_TO_PTR (imports->Name, section, executable);
-		  || (signature != IMAGE_NT_SIGNATURE &&
-		      LOWORD (signature) != IMAGE_OS2_SIGNATURE))
+	      if (strcmp (dllname, "cygwin.dll") == 0)
-		is_dos_binary = TRUE;
+	    {
+		  *is_cygnus_app = TRUE;
+		  break;
+		}
 	    }
 	}
-close (fd);
+}
-}
+unwind:
-return is_dos_binary;
+close_file_data (&executable);
 }
-/* We pass our process ID to our children by setting up an environment
+int
-variable in their environment.  */
+compare_env (const char **strp1, const char **strp2)
-char ppid_env_var_buffer[64];
+{
+const char *str1 = *strp1, *str2 = *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;
+}
+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
 sys_spawnve (int mode, char *cmdname, char **argv, char **envp)
 {
 Lisp_Object program, full;
 char *cmdline, *env, *parg, **targ;
-int arglen;
+int arglen, numenv;
 int pid;
 child_process *cp;
-int is_dos_binary;
+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};
 struct gcpro gcpro1;
 /* We don't care about the other modes */
 if (mode != _P_NOWAIT)
 {
 	{
 	  UNGCPRO;
 	  errno = EINVAL;
 	  return -1;
 	}
-cmdname = XSTRING (full)->_data;
+cmdname = XSTRING_DATA (full);
 argv[0] = cmdname;
 }
 UNGCPRO;
+/* make sure argv[0] and cmdname are both in DOS format */
-/* make sure cmdname is in DOS format */
 strcpy (cmdname = alloca (strlen (cmdname) + 1), argv[0]);
 unixtodos_filename (cmdname);
 argv[0] = cmdname;
-/* Check if program is a DOS executable, and if so whether we are
+/* Determine whether program is a 16-bit DOS executable, or a Win32
-allowed to start it. */
+executable that is implicitly linked to the Cygnus dll (implying it
-is_dos_binary = win32_is_dos_binary (cmdname);
+was compiled with the Cygnus GNU toolchain and hence relies on
-if (is_dos_binary && dos_process_running)
+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). */
-errno = EAGAIN;
+win32_executable_type (cmdname, &is_dos_app, &is_cygnus_app);
-return -1;
+/* 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 = alloca (MAXPATHLEN);
+if (egetenv ("CMDPROXY"))
+	strcpy (cmdname, egetenv ("CMDPROXY"));
+else
+{
+	  strcpy (cmdname, XSTRING_DATA (Vinvocation_directory));
+	  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.
-Additionally, zero-length args and args containing whitespace need
+Additionally, zero-length args and args containing whitespace or
-to be wrapped in double quotes.  Args containing embedded double
+quote chars need to be wrapped in double quotes - for this to work,
-quotes (as opposed to enclosing quotes, which we leave alone) are
+embedded quotes need to be escaped as well.  The aim is to ensure
-usually illegal (most Win32 programs do not implement escaping of
+the child process reconstructs the argv array we start with
-double quotes - sad but true, at least for programs compiled with
+exactly, so we treat quotes at the beginning and end of arguments
-MSVC), but we will escape quotes anyway for those programs that can
+as embedded quotes.
-handle it.  The Win32 gcc library from Cygnus doubles quotes to
-escape them, so we will use that convention.
+The Win32 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 I have no idea how large argv and envp are likely to be
+Since we have no idea how large argv and envp are likely to be we
-we figure out list lengths on the fly and allocate them.  */
+figure out list lengths on the fly and allocate them.  */
+if (!NILP (Vwin32_quote_process_args))
+{
+do_quoting = 1;
+/* Override escape char by binding win32-quote-process-args to
+	 desired character, or use t for auto-selection.  */
+if (INTP (Vwin32_quote_process_args))
+	escape_char = XINT (Vwin32_quote_process_args);
+else
+	escape_char = is_cygnus_app ? '"' : '\\';
+}
 /* do argv...  */
 arglen = 0;
 targ = argv;
 while (*targ)
 {
 char * p = *targ;
-int add_quotes = 0;
+int need_quotes = 0;
+int escape_char_run = 0;
 if (*p == 0)
-	add_quotes = 1;
+	need_quotes = 1;
-while (*p)
+for ( ; *p; p++)
-	if (*p++ == '"')
+	{
+	  if (*p == '"')
 	  {
-	    /* allow for embedded quotes to be doubled - we won't
+	      /* allow for embedded quotes to be escaped */
-	       actually double quotes that aren't embedded though */
 	    arglen++;
-	    add_quotes = 1;
+	      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')
-	add_quotes = 1;
+	    {
-if (add_quotes)
+	      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 = alloca (arglen);
 targ = argv;
 parg = cmdline;
 while (*targ)
 {
 char * p = *targ;
-int add_quotes = 0;
+int need_quotes = 0;
 if (*p == 0)
-	add_quotes = 1;
+	need_quotes = 1;
-if (!NILP (Vwin32_quote_process_args))
+if (do_quoting)
 	{
-	  /* This is conditional because it sometimes causes more
-	     problems than it solves, since argv arrays are not always
-	     carefully constructed.  M-x grep, for instance, passes the
-	     whole command line as one argument, so it becomes
-	     impossible to pass a regexp which contains spaces. */
 	  for ( ; *p; p++)
 	    if (*p == ' ' || *p == '\t' || *p == '"')
-	      add_quotes = 1;
+	      need_quotes = 1;
 	}
-if (add_quotes)
+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
+	     `win32-quote-process-args' was added.  */
 	  while (*p)
 	    {
 	      if (*p == '"' && p > first && p < last)
-		*parg++ = '"';	/* double up embedded quotes only */
+		*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 = '\0';
 /* and envp...  */
 arglen = 1;
 targ = envp;
+numenv = 1; /* for end null */
 while (*targ)
 {
 arglen += strlen (*targ++) + 1;
-}
+numenv++;
+}
+/* extra env vars... */
 sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d",
 	   GetCurrentProcessId ());
 arglen += strlen (ppid_env_var_buffer) + 1;
+numenv++;
+/* 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);
-targ = envp;
 parg = env;
 while (*targ)
 {
 strcpy (parg, *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)
 delete_child (cp);
 errno = ENOEXEC;
 return -1;
 }
-if (is_dos_binary)
-{
-cp->is_dos_process = TRUE;
-dos_process_running = TRUE;
-}
 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.
-#if 0
+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.  */
 /* From ntterm.c */
 extern HANDLE keyboard_handle;
-#endif
 /* From process.c */
 extern int proc_buffered_char[];
 int
 sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds,
 	    EMACS_TIME *timeout)
 {
 SELECT_TYPE orfds;
-DWORD timeout_ms;
+DWORD timeout_ms, start_time;
-int i, nh, nr;
+int i, nh, nc, nr;
 DWORD active;
-child_process *cp;
+child_process *cp, *cps[MAX_CHILDREN];
-HANDLE wait_hnd[MAXDESC];
+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)
 {
-Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
+Sleep (timeout_ms);
 return 0;
 }
 /* Otherwise, we only handle rfds, so fail otherwise.  */
 if (rfds == NULL || wfds != NULL || efds != NULL)
 orfds = *rfds;
 FD_ZERO (rfds);
 nr = 0;
-/* Build a list of handles to wait on.  */
+/* Build a list of pipe handles to wait on.  */
 nh = 0;
 for (i = 0; i < nfds; i++)
 if (FD_ISSET (i, &orfds))
 {
 	if (i == 0)
 	  {
 #if 0
+/* Sync with FSF Emacs 19.34.6 note:  ifdef'ed out in XEmacs */
 	    if (keyboard_handle)
 	      {
 		/* Handle stdin specially */
 		wait_hnd[nh] = keyboard_handle;
 		fdindex[nh] = i;
 	      }
 #endif
 	    /* Check for any emacs-generated input in the queue since
 	       it won't be detected in the wait */
-	    if (detect_input_pending ())
+		if (detect_input_pending ())
 	      {
 		FD_SET (i, rfds);
 		return 1;
 	      }
 	  }
 #endif
 	      }
 	    else
 	      {
 		/* 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));
-		abort ();
+	      }
 	      }
 	  }
+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)
-	Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
+	Sleep (timeout_ms);
 return 0;
 }
-/*
+/* Wait for input or child death to be signalled.  */
-Wait for input
+start_time = GetTickCount ();
-If a child process dies while this is waiting, its pipe will break
+active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms);
-so the reader thread will signal an error condition, thus, the wait
-will wake up
-*/
-timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE;
-active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms);
 if (active == WAIT_FAILED)
 {
 DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n",
-		 nh, timeout_ms, GetLastError ()));
+		 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;
 else if (active >= WAIT_ABANDONED_0 &&
 	   active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS)
 {
 active -= WAIT_ABANDONED_0;
 }
+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
 {
-if (fdindex[active] == 0)
+if (active >= nh)
 	{
-	  /* Keyboard input available */
+	  cp = cps[active - nh];
-	  FD_SET (0, rfds);
-	  nr++;
+	  /* We cannot always signal SIGCHLD immediately; if we have not
-	}
+	     finished reading the process output, we must delay sending
-else
+	     SIGCHLD until we do.  */
-	{
-	  /* must be a socket or pipe */
+	  if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0)
-	  int current_status;
+	    fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD;
+	  /* SIG_DFL for SIGCHLD is ignore */
-	  cp = fd_info[ fdindex[active] ].cp;
+	  else if (sig_handlers[SIGCHLD] != SIG_DFL &&
-	  /* Read ahead should have completed, either succeeding or failing. */
-	  FD_SET (fdindex[active], rfds);
-	  nr++;
-	  current_status = cp->status;
-	  if (current_status != STATUS_READ_SUCCEEDED)
-	    {
-	      if (current_status != STATUS_READ_FAILED)
-		DebPrint (("internal error: subprocess pipe signalled "
-			   "at the wrong time (status %d)\n!", current_status));
-	      /* The child_process entry for a socket or pipe will be
-		 freed when the last descriptor using it is closed; for
-		 pipes, we call the SIGCHLD handler. */
-	      if (fd_info[ fdindex[active] ].flags & FILE_PIPE)
-		{
-		  /* 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)
 		    {
 #ifdef FULL_DEBUG
 		      DebPrint (("select calling SIGCHLD handler for pid %d\n",
 				 cp->pid));
 #endif
 		      dead_child = cp;
 		      sig_handlers[SIGCHLD] (SIGCHLD);
 		      dead_child = NULL;
 		    }
-		  /* Clean up the child process entry in the table */
-		  reap_subprocess (cp);
 		}
+else if (fdindex[active] == 0)
+	{
+	  /* Keyboard input available */
+	  FD_SET (0, rfds);
+	  nr++;
 	    }
-	}
+else
+	{
-/* Test for input on remaining channels. */
+	  /* must be a socket or pipe - read ahead should have
-while (++active < nh)
+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);
+} 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 */
+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
 sys_kill (int pid, int sig)
 {
 child_process *cp;
 HANDLE proc_hand;
 }
 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)
 {
+if (NILP (Vwin32_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 && 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, 0, 0);
+	      keybd_event (vk_break_code, break_scan_code, 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 (10);
+	      SetForegroundWindow (foreground_window);
+	    }
+	}
 /* Ctrl-Break is NT equivalent of SIGINT.  */
-if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
+else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid))
 {
 	  DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
 		     "for pid %lu\n", GetLastError (), pid));
 	  errno = EINVAL;
 	  rc = -1;
 }
 }
 else
 {
+if (NILP (Vwin32_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 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.  Also, don't try to terminate DOS processes
+	 used in every case.  */
-	 (on Win95), because this will hang Emacs. */
+else if (!TerminateProcess (proc_hand, 0xff))
-if (!(cp && cp->is_dos_process)
-	  && !TerminateProcess (proc_hand, 0xff))
 {
 	  DebPrint (("sys_kill.TerminateProcess returned %d "
 		     "for pid %lu\n", GetLastError (), pid));
 	  errno = EINVAL;
 	  rc = -1;
 return rc;
 }
 #if 0
+/* Sync with FSF Emacs 19.34.6 note: ifdef'ed out in XEmacs */
 extern int report_file_error (CONST char *, Lisp_Object);
 #endif
 /* The following two routines are used to manipulate stdin, stdout, and
 stderr of our child processes.
 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
 }
 #endif /* HAVE_SOCKETS */
+/* 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 ("win32-short-file-name", Fwin32_short_file_name, 1, 1, "", /*
+Return the short file name version (8.3) of the full path of FILENAME.
+If FILENAME does not exist, return nil.
+All path elements in FILENAME are converted to their short names.
+*/
+(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_DATA (filename), shortname, MAX_PATH) == 0)
+return Qnil;
+CORRECT_DIR_SEPS (shortname);
+return build_string (shortname);
+}
+DEFUN ("win32-long-file-name", Fwin32_long_file_name, 1, 1, "", /*
+Return the long file name version of the full path of FILENAME.
+If FILENAME does not exist, return nil.
+All path elements in FILENAME are converted to their long names.
+*/
+(filename))
+{
+char longname[ MAX_PATH ];
+CHECK_STRING (filename, 0);
+/* first expand it.  */
+filename = Fexpand_file_name (filename, Qnil);
+if (!win32_get_long_filename (XSTRING_DATA (filename), longname, MAX_PATH))
+return Qnil;
+CORRECT_DIR_SEPS (longname);
+return build_string (longname);
+}
+DEFUN ("win32-set-process-priority", Fwin32_set_process_priority, 2, 2, "", /*
+Set the priority of PROCESS to PRIORITY.
+If PROCESS is nil, the priority of Emacs is changed, otherwise the
+priority of the process whose pid is PROCESS is changed.
+PRIORITY should be one of the symbols high, normal, or low;
+any other symbol will be interpreted as normal.
+If successful, the return value is t, otherwise nil.
+*/
+(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_INT (process);
+/* 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 ("win32-get-locale-info", Fwin32_get_locale_info, 1, 2, "", /*
+"Return information about the Windows locale LCID.
+By default, return a three letter locale code which encodes the default
+language as the first two characters, and the country or regionial variant
+as the third letter.  For example, ENU refers to `English (United States)',
+while ENC means `English (Canadian)'.
+If the optional argument LONGFORM is non-nil, the long form of the locale
+name is returned, e.g. `English (United States)' instead.
+If LCID (a 16-bit number) is not a valid locale, the result is nil.
+*/
+(lcid, longform))
+{
+int got_abbrev;
+int got_full;
+char abbrev_name[32] = { 0 };
+char full_name[256] = { 0 };
+CHECK_INT (lcid);
+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
+{
+got_full = GetLocaleInfo (XINT (lcid),
+				LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP,
+				full_name, sizeof (full_name));
+if (got_full)
+	return build_string (full_name);
+}
+return Qnil;
+}
+DEFUN ("win32-get-current-locale-id", Fwin32_get_current_locale_id, 0, 0, "", /*
+"Return Windows locale id for current locale setting.
+This is a numerical value; use `win32-get-locale-info' to convert to a
+human-readable form.
+*/
+())
+{
+return make_int (GetThreadLocale ());
+}
+DEFUN ("win32-get-default-locale-id", Fwin32_get_default_locale_id, 0, 1, "", /*
+"Return Windows locale id for default locale setting.
+By default, the system default locale setting is returned; if the optional
+parameter USERP is non-nil, the user default locale setting is returned.
+This is a numerical value; use `win32-get-locale-info' to convert to a
+human-readable form.
+*/
+(userp))
+{
+if (NILP (userp))
+return make_int (GetSystemDefaultLCID ());
+return make_int (GetUserDefaultLCID ());
+}
+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 Vwin32_valid_locale_ids;
+BOOL CALLBACK enum_locale_fn (LPTSTR localeNum)
+{
+DWORD id = int_from_hex (localeNum);
+Vwin32_valid_locale_ids = Fcons (make_int (id), Vwin32_valid_locale_ids);
+return TRUE;
+}
+DEFUN ("win32-get-valid-locale-ids", Fwin32_get_valid_locale_ids, 0, 0, "", /*
+Return list of all valid Windows locale ids.
+Each id is a numerical value; use `win32-get-locale-info' to convert to a
+human-readable form.
+*/
+())
+{
+Vwin32_valid_locale_ids = Qnil;
+EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED);
+Vwin32_valid_locale_ids = Fnreverse (Vwin32_valid_locale_ids);
+return Vwin32_valid_locale_ids;
+}
+DEFUN ("win32-set-current-locale", Fwin32_set_current_locale, 1, 1, "", /*
+Make Windows locale LCID be the current locale setting for Emacs.
+If successful, the new locale id is returned, otherwise nil.
+*/
+(lcid))
+{
+CHECK_INT (lcid);
+if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED))
+return Qnil;
+if (!SetThreadLocale (XINT (lcid)))
+return Qnil;
+/* Sync with FSF Emacs 19.34.6 note: dwWinThreadId declared in
+w32term.h and defined in w32fns.c, both of which are not in current
+XEmacs.  ### Check what we lose by ifdef'ing out these. --marcpa */
+#if 0
+/* Need to set input thread locale if present.  */
+if (dwWinThreadId)
+/* Reply is not needed.  */
+PostThreadMessage (dwWinThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0);
+#endif
+return make_int (GetThreadLocale ());
+}
 syms_of_ntproc ()
 {
+Qhigh = intern ("high");
+Qlow = intern ("low");
 #ifdef HAVE_SOCKETS
 DEFSUBR (Fwin32_has_winsock);
 DEFSUBR (Fwin32_unload_winsock);
 #endif
+DEFSUBR (Fwin32_short_file_name);
+DEFSUBR (Fwin32_long_file_name);
+DEFSUBR (Fwin32_set_process_priority);
+DEFSUBR (Fwin32_get_locale_info);
+DEFSUBR (Fwin32_get_current_locale_id);
+DEFSUBR (Fwin32_get_default_locale_id);
+DEFSUBR (Fwin32_get_valid_locale_ids);
+DEFSUBR (Fwin32_set_current_locale);
 DEFVAR_LISP ("win32-quote-process-args", &Vwin32_quote_process_args /*
 Non-nil enables quoting of process arguments to ensure correct parsing.
 Because Windows does not directly pass argv arrays to child processes,
 programs have to reconstruct the argv array by parsing the command
 line string.  For an argument to contain a space, it must be enclosed
 in double quotes or it will be parsed as multiple arguments.
-However, the argument list to call-process is not always correctly
+If the value is a character, that character will be used to escape any
-constructed (or arguments have already been quoted), so enabling this
+quote characters that appear, otherwise a suitable escape character
-option may cause unexpected behavior.*/ );
+will be chosen based on the type of the program.
-Vwin32_quote_process_args = Qnil;
+*/ );
+Vwin32_quote_process_args = Qt;
+DEFVAR_LISP ("win32-start-process-show-window",
+	       &Vwin32_start_process_show_window /*
+When nil, processes started via start-process hide their windows.
+When non-nil, they show their window in the method of their choice.
+*/ );
+Vwin32_start_process_show_window = Qnil;
+DEFVAR_LISP ("win32-start-process-share-console",
+	       &Vwin32_start_process_share_console /*
+When nil, processes started via start-process are given a new console.
+When non-nil, they share the Emacs console; this has the limitation of
+allowing only only 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.
+*/ );
+Vwin32_start_process_share_console = Qnil;
 DEFVAR_INT ("win32-pipe-read-delay", &Vwin32_pipe_read_delay /*
 Forced delay before reading subprocess output.
 This is done to improve the buffering of subprocess output, by
 avoiding the inefficiency of frequently reading small amounts of data.
 If positive, the value is the number of milliseconds to sleep before
 reading the subprocess output.  If negative, the magnitude is the number
 of time slices to wait (effectively boosting the priority of the child
-process temporarily).  A value of zero disables waiting entirely.*/ );
+process temporarily).  A value of zero disables waiting entirely.
+*/ );
 Vwin32_pipe_read_delay = 50;
 DEFVAR_LISP ("win32-downcase-file-names", &Vwin32_downcase_file_names /*
 Non-nil means convert all-upper case file names to lower case.
 This applies when performing completions and file name expansion.*/ );
 Vwin32_downcase_file_names = Qnil;
+#if 0
+DEFVAR_LISP ("win32-generate-fake-inodes", &Vwin32_generate_fake_inodes /*
+"Non-nil means attempt to fake realistic inode values.
+This works by hashing the truename of files, and should detect
+aliasing between long and short (8.3 DOS) names, but can have
+false positives because of hash collisions.  Note that determing
+the truename of a file can be slow.
+*/ );
+Vwin32_generate_fake_inodes = Qnil;
+#endif
+DEFVAR_LISP ("win32-get-true-file-attributes", &Vwin32_get_true_file_attributes /*
+"Non-nil means determine accurate link count in file-attributes.
+This option slows down file-attributes noticeably, so is disabled by
+default.  Note that it is only useful for files on NTFS volumes,
+where hard links are supported.
+*/ );
+Vwin32_get_true_file_attributes = Qnil;
 }
 /* end of ntproc.c */

Mercurial > hg > xemacs-beta

comparison src/ntproc.c @ 209:41ff10fd062f r20-4b3