--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/process.c	Mon Aug 13 11:28:15 2007 +0200
@@ -0,0 +1,2099 @@
+/* Asynchronous subprocess control for XEmacs.
+   Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
+   Free Software Foundation, Inc.
+   Copyright (C) 1995 Sun Microsystems, Inc.
+   Copyright (C) 1995, 1996 Ben Wing.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* This file has been Mule-ized except for `start-process-internal',
+   `open-network-stream-internal' and `open-multicast-group-internal'. */
+
+/* This file has been split into process.c and process-unix.c by
+   Kirill M. Katsnelson <kkm@kis.ru>, so please bash him and not
+   the original author(s) */
+
+#include <config.h>
+
+#if !defined (NO_SUBPROCESSES)
+
+/* The entire file is within this conditional */
+
+#include "lisp.h"
+
+#include "buffer.h"
+#include "commands.h"
+#include "events.h"
+#include "frame.h"
+#include "hash.h"
+#include "insdel.h"
+#include "lstream.h"
+#include "opaque.h"
+#include "process.h"
+#include "procimpl.h"
+#include "window.h"
+#ifdef FILE_CODING
+#include "file-coding.h"
+#endif
+
+#include "sysfile.h"
+#include "sysproc.h"
+#include "systime.h"
+#include "syssignal.h" /* Always include before systty.h */
+#include "systty.h"
+#include "syswait.h"
+
+Lisp_Object Qprocessp;
+
+/* Process methods */
+struct process_methods the_process_methods;
+
+/* a process object is a network connection when its pid field a cons
+   (name of name of port we are connected to . foreign host name) */
+
+/* Valid values of process->status_symbol */
+Lisp_Object Qrun, Qstop;
+/* Qrun => Qopen, Qexit => Qclosed for "network connection" processes */
+Lisp_Object Qopen, Qclosed;
+/* Protocol families */
+Lisp_Object Qtcp, Qudp;
+
+#ifdef HAVE_MULTICAST
+Lisp_Object Qmulticast; /* Will be used for occasional warnings */
+#endif
+
+/* t means use pty, nil means use a pipe,
+   maybe other values to come.  */
+Lisp_Object Vprocess_connection_type;
+
+/* Read comments to DEFVAR of this */
+int windowed_process_io;
+
+#ifdef PROCESS_IO_BLOCKING
+/* List of port numbers or port names to set a blocking I/O mode.
+   Nil means set a non-blocking I/O mode [default]. */
+Lisp_Object network_stream_blocking_port_list;
+#endif  /* PROCESS_IO_BLOCKING */
+
+/* Number of events of change of status of a process.  */
+volatile int process_tick;
+
+/* Number of events for which the user or sentinel has been notified.  */
+static int update_tick;
+
+/* Nonzero means delete a process right away if it exits.  */
+int delete_exited_processes;
+
+/* Hash table which maps USIDs as returned by create_stream_pair_cb to
+   process objects. Processes are not GC-protected through this! */
+struct hash_table *usid_to_process;
+
+/* List of process objects. */
+Lisp_Object Vprocess_list;
+
+extern Lisp_Object Vlisp_EXEC_SUFFIXES;
+
+
+
+static Lisp_Object
+mark_process (Lisp_Object obj)
+{
+  struct Lisp_Process *proc = XPROCESS (obj);
+  MAYBE_PROCMETH (mark_process_data, (proc));
+  mark_object (proc->name);
+  mark_object (proc->command);
+  mark_object (proc->filter);
+  mark_object (proc->sentinel);
+  mark_object (proc->buffer);
+  mark_object (proc->mark);
+  mark_object (proc->pid);
+  mark_object (proc->pipe_instream);
+  mark_object (proc->pipe_outstream);
+#ifdef FILE_CODING
+  mark_object (proc->coding_instream);
+  mark_object (proc->coding_outstream);
+#endif
+  return proc->status_symbol;
+}
+
+static void
+print_process (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  struct Lisp_Process *proc = XPROCESS (obj);
+
+  if (print_readably)
+    error ("printing unreadable object #<process %s>",
+           XSTRING_DATA (proc->name));
+
+  if (!escapeflag)
+    {
+      print_internal (proc->name, printcharfun, 0);
+    }
+  else
+    {
+      int netp = network_connection_p (obj);
+      write_c_string ((netp ? GETTEXT ("#<network connection ") :
+		       GETTEXT ("#<process ")), printcharfun);
+      print_internal (proc->name, printcharfun, 1);
+      write_c_string ((netp ? " " : " pid "), printcharfun);
+      print_internal (proc->pid, printcharfun, 1);
+      write_c_string (" state:", printcharfun);
+      print_internal (proc->status_symbol, printcharfun, 1);
+      MAYBE_PROCMETH (print_process_data, (proc, printcharfun));
+      write_c_string (">", printcharfun);
+    }
+}
+
+#ifdef HAVE_WINDOW_SYSTEM
+extern void debug_process_finalization (struct Lisp_Process *p);
+#endif /* HAVE_WINDOW_SYSTEM */
+
+static void
+finalize_process (void *header, int for_disksave)
+{
+  /* #### this probably needs to be tied into the tty event loop */
+  /* #### when there is one */
+  struct Lisp_Process *p = (struct Lisp_Process *) header;
+#ifdef HAVE_WINDOW_SYSTEM
+  if (!for_disksave)
+    {
+      debug_process_finalization (p);
+    }
+#endif /* HAVE_WINDOW_SYSTEM */
+
+  if (p->process_data)
+    {
+      MAYBE_PROCMETH (finalize_process_data, (p, for_disksave));
+      if (!for_disksave)
+	xfree (p->process_data);
+    }
+}
+
+DEFINE_LRECORD_IMPLEMENTATION ("process", process,
+                               mark_process, print_process, finalize_process,
+                               0, 0, 0, struct Lisp_Process);
+
+/************************************************************************/
+/*                       basic process accessors                        */
+/************************************************************************/
+
+/* Under FILE_CODING, this function returns low-level streams, connected
+   directly to the child process, rather than en/decoding FILE_CODING
+   streams */
+void
+get_process_streams (struct Lisp_Process *p,
+		     Lisp_Object *instr, Lisp_Object *outstr)
+{
+  assert (p);
+  assert (NILP (p->pipe_instream) || LSTREAMP(p->pipe_instream));
+  assert (NILP (p->pipe_outstream) || LSTREAMP(p->pipe_outstream));
+  *instr = p->pipe_instream;
+  *outstr = p->pipe_outstream;
+}
+
+struct Lisp_Process *
+get_process_from_usid (USID usid)
+{
+  CONST void *vval;
+
+  assert (usid != USID_ERROR && usid != USID_DONTHASH);
+
+  if (gethash ((CONST void*)usid, usid_to_process, &vval))
+    {
+      Lisp_Object proc;
+      CVOID_TO_LISP (proc, vval);
+      return XPROCESS (proc);
+    }
+  else
+    return 0;
+}
+
+int
+get_process_selected_p (struct Lisp_Process *p)
+{
+  return p->selected;
+}
+
+void
+set_process_selected_p (struct Lisp_Process *p, int selected_p)
+{
+  p->selected = !!selected_p;
+}
+
+int
+connected_via_filedesc_p (struct Lisp_Process *p)
+{
+  return MAYBE_INT_PROCMETH (tooltalk_connection_p, (p));
+}
+
+#ifdef HAVE_SOCKETS
+int
+network_connection_p (Lisp_Object process)
+{
+  return CONSP (XPROCESS (process)->pid);
+}
+#endif
+
+DEFUN ("processp", Fprocessp, 1, 1, 0, /*
+Return t if OBJECT is a process.
+*/
+       (obj))
+{
+  return PROCESSP (obj) ? Qt : Qnil;
+}
+
+DEFUN ("process-list", Fprocess_list, 0, 0, 0, /*
+Return a list of all processes.
+*/
+       ())
+{
+  return Fcopy_sequence (Vprocess_list);
+}
+
+DEFUN ("get-process", Fget_process, 1, 1, 0, /*
+Return the process named NAME, or nil if there is none.
+*/
+       (name))
+{
+  Lisp_Object tail;
+
+  if (PROCESSP (name))
+    return name;
+
+  if (!gc_in_progress)
+    /* this only gets called during GC when emacs is going away as a result
+       of a signal or crash. */
+    CHECK_STRING (name);
+
+  for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
+    {
+      Lisp_Object proc = XCAR (tail);
+      QUIT;
+      if (internal_equal (name, XPROCESS (proc)->name, 0))
+        return XCAR (tail);
+    }
+  return Qnil;
+}
+
+DEFUN ("get-buffer-process", Fget_buffer_process, 1, 1, 0, /*
+Return the (or, a) process associated with BUFFER.
+BUFFER may be a buffer or the name of one.
+*/
+       (name))
+{
+  Lisp_Object buf, tail, proc;
+
+  if (NILP (name)) return Qnil;
+  buf = Fget_buffer (name);
+  if (NILP (buf)) return Qnil;
+
+  for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
+    {
+      /* jwz: do not quit here - it isn't necessary, as there is no way for
+	 Vprocess_list to get circular or overwhelmingly long, and this
+	 function is called from layout_mode_element under redisplay. */
+      /* QUIT; */
+      proc = XCAR (tail);
+      if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf))
+	return proc;
+    }
+  return Qnil;
+}
+
+/* This is how commands for the user decode process arguments.  It
+   accepts a process, a process name, a buffer, a buffer name, or nil.
+   Buffers denote the first process in the buffer, and nil denotes the
+   current buffer.  */
+
+static Lisp_Object
+get_process (Lisp_Object name)
+{
+  Lisp_Object proc, obj;
+
+#ifdef I18N3
+  /* #### Look more closely into translating process names. */
+#endif
+
+  /* This may be called during a GC from process_send_signal() from
+     kill_buffer_processes() if emacs decides to abort(). */
+  if (PROCESSP (name))
+    return name;
+
+  if (STRINGP (name))
+    {
+      obj = Fget_process (name);
+      if (NILP (obj))
+        obj = Fget_buffer (name);
+      if (NILP (obj))
+        error ("Process %s does not exist", XSTRING_DATA (name));
+    }
+  else if (NILP (name))
+    obj = Fcurrent_buffer ();
+  else
+    obj = name;
+
+  /* Now obj should be either a buffer object or a process object.
+   */
+  if (BUFFERP (obj))
+    {
+      proc = Fget_buffer_process (obj);
+      if (NILP (proc))
+	error ("Buffer %s has no process", XSTRING_DATA (XBUFFER(obj)->name));
+    }
+  else
+    {
+      /* #### This was commented out. Although, simple
+	 (kill-process 7 "qqq") resulted in a fatal error. - kkm */
+      CHECK_PROCESS (obj);
+      proc = obj;
+    }
+  return proc;
+}
+
+DEFUN ("process-id", Fprocess_id, 1, 1, 0, /*
+Return the process id of PROCESS.
+This is the pid of the Unix process which PROCESS uses or talks to.
+For a network connection, this value is a cons of
+ (foreign-network-port . foreign-host-name).
+*/
+       (proc))
+{
+  Lisp_Object pid;
+  CHECK_PROCESS (proc);
+
+  pid = XPROCESS (proc)->pid;
+  if (network_connection_p (proc))
+    /* return Qnil; */
+    return Fcons (Fcar (pid), Fcdr (pid));
+  else
+    return pid;
+}
+
+DEFUN ("process-name", Fprocess_name, 1, 1, 0, /*
+Return the name of PROCESS, as a string.
+This is the name of the program invoked in PROCESS,
+possibly modified to make it unique among process names.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->name;
+}
+
+DEFUN ("process-command", Fprocess_command, 1, 1, 0, /*
+Return the command that was executed to start PROCESS.
+This is a list of strings, the first string being the program executed
+and the rest of the strings being the arguments given to it.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->command;
+}
+
+
+/************************************************************************/
+/*                          creating a process                          */
+/************************************************************************/
+
+Lisp_Object
+make_process_internal (Lisp_Object name)
+{
+  Lisp_Object val, name1;
+  int i;
+  struct Lisp_Process *p =
+    alloc_lcrecord_type (struct Lisp_Process, &lrecord_process);
+
+  /* If name is already in use, modify it until it is unused.  */
+  name1 = name;
+  for (i = 1; ; i++)
+    {
+      char suffix[10];
+      Lisp_Object tem = Fget_process (name1);
+      if (NILP (tem))
+        break;
+      sprintf (suffix, "<%d>", i);
+      name1 = concat2 (name, build_string (suffix));
+    }
+  name = name1;
+  p->name = name;
+
+  p->command  = Qnil;
+  p->filter   = Qnil;
+  p->sentinel = Qnil;
+  p->buffer   = Qnil;
+  p->mark = Fmake_marker ();
+  p->pid = Qnil;
+  p->status_symbol = Qrun;
+  p->exit_code = 0;
+  p->core_dumped = 0;
+  p->filter_does_read = 0;
+  p->kill_without_query = 0;
+  p->selected = 0;
+  p->tick = 0;
+  p->update_tick = 0;
+  p->pipe_instream  = Qnil;
+  p->pipe_outstream = Qnil;
+#ifdef FILE_CODING
+  p->coding_instream  = Qnil;
+  p->coding_outstream = Qnil;
+#endif
+
+  p->process_data = 0;
+  MAYBE_PROCMETH (alloc_process_data, (p));
+
+  XSETPROCESS (val, p);
+
+  Vprocess_list = Fcons (val, Vprocess_list);
+  return val;
+}
+
+void
+init_process_io_handles (struct Lisp_Process *p, void* in, void* out, int flags)
+{
+  USID usid = event_stream_create_stream_pair (in, out,
+					       &p->pipe_instream, &p->pipe_outstream,
+					       flags);
+
+  if (usid == USID_ERROR)
+    report_file_error ("Setting up communication with subprocess", Qnil);
+
+  if (usid != USID_DONTHASH)
+    {
+      Lisp_Object proc = Qnil;
+      XSETPROCESS (proc, p);
+      puthash ((CONST void*)usid, LISP_TO_VOID (proc), usid_to_process);
+    }
+
+  MAYBE_PROCMETH (init_process_io_handles, (p, in, out, flags));
+
+#ifdef FILE_CODING
+  p->coding_instream = make_decoding_input_stream
+    (XLSTREAM (p->pipe_instream),
+     Fget_coding_system (Vcoding_system_for_read));
+  Lstream_set_character_mode (XLSTREAM (p->coding_instream));
+  p->coding_outstream = make_encoding_output_stream
+    (XLSTREAM (p->pipe_outstream),
+     Fget_coding_system (Vcoding_system_for_write));
+  /* CODE_CNTL (&out_state[outchannel]) |= CC_END; !!####
+     What's going on here? */
+#endif /* FILE_CODING */
+}
+
+static void
+create_process (Lisp_Object process, Lisp_Object *argv, int nargv,
+		Lisp_Object program, Lisp_Object cur_dir)
+{
+  struct Lisp_Process *p = XPROCESS (process);
+  int pid;
+
+  /* *_create_process may change status_symbol, if the process
+     is a kind of "fire-and-forget" (no I/O, unwaitable) */
+  p->status_symbol = Qrun;
+  p->exit_code = 0;
+
+  pid = PROCMETH (create_process, (p, argv, nargv, program, cur_dir));
+
+  p->pid = make_int (pid);
+  if (!NILP(p->pipe_instream))
+    event_stream_select_process (p);
+}
+
+/* This function is the unwind_protect form for Fstart_process_internal.  If
+   PROC doesn't have its pid set, then we know someone has signalled
+   an error and the process wasn't started successfully, so we should
+   remove it from the process list.  */
+static void remove_process (Lisp_Object proc);
+static Lisp_Object
+start_process_unwind (Lisp_Object proc)
+{
+  /* Was PROC started successfully?  */
+  if (EQ (XPROCESS (proc)->pid, Qnil))
+    remove_process (proc);
+  return Qnil;
+}
+
+DEFUN ("start-process-internal", Fstart_process_internal, 3, MANY, 0, /*
+Start a program in a subprocess.  Return the process object for it.
+Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS
+NAME is name for process.  It is modified if necessary to make it unique.
+BUFFER is the buffer or (buffer-name) to associate with the process.
+ Process output goes at end of that buffer, unless you specify
+ an output stream or filter function to handle the output.
+ BUFFER may be also nil, meaning that this process is not associated
+ with any buffer
+Third arg is program file name.  It is searched for as in the shell.
+Remaining arguments are strings to give program as arguments.
+INCODE and OUTCODE specify the coding-system objects used in input/output
+ from/to the process.
+*/
+       (int nargs, Lisp_Object *args))
+{
+  /* This function can call lisp */
+  /* !!#### This function has not been Mule-ized */
+  Lisp_Object buffer, name, program, proc, current_dir;
+  Lisp_Object tem;
+  int speccount = specpdl_depth ();
+  struct gcpro gcpro1, gcpro2, gcpro3;
+
+  name = args[0];
+  buffer = args[1];
+  program = args[2];
+  current_dir = Qnil;
+
+  /* Protect against various file handlers doing GCs below. */
+  GCPRO3 (buffer, program, current_dir);
+
+  if (!NILP (buffer))
+    buffer = Fget_buffer_create (buffer);
+
+  CHECK_STRING (name);
+  CHECK_STRING (program);
+
+  /* Make sure that the child will be able to chdir to the current
+     buffer's current directory, or its unhandled equivalent.  We
+     can't just have the child check for an error when it does the
+     chdir, since it's in a vfork.
+
+     Note: these assignments and calls are like this in order to insure
+     "caller protects args" GC semantics. */
+  current_dir = current_buffer->directory;
+  current_dir = Funhandled_file_name_directory (current_dir);
+  current_dir = expand_and_dir_to_file (current_dir, Qnil);
+
+#if 0	/* This loser breaks ange-ftp */
+  /* dmoore - if you re-enable this code, you have to gcprotect
+     current_buffer through the above calls. */
+  if (NILP (Ffile_accessible_directory_p (current_dir)))
+    report_file_error ("Setting current directory",
+		       list1 (current_buffer->directory));
+#endif /* 0 */
+
+  /* If program file name is not absolute, search our path for it */
+  if (!IS_DIRECTORY_SEP (XSTRING_BYTE (program, 0))
+      && !(XSTRING_LENGTH (program) > 1
+	   && IS_DEVICE_SEP (XSTRING_BYTE (program, 1))))
+    {
+      struct gcpro ngcpro1;
+
+      tem = Qnil;
+      NGCPRO1 (tem);
+      locate_file (Vexec_path, program, Vlisp_EXEC_SUFFIXES, &tem, X_OK);
+      if (NILP (tem))
+	report_file_error ("Searching for program", list1 (program));
+      program = Fexpand_file_name (tem, Qnil);
+      NUNGCPRO;
+    }
+  else
+    {
+      if (!NILP (Ffile_directory_p (program)))
+	error ("Specified program for new process is a directory");
+    }
+
+  proc = make_process_internal (name);
+
+  XPROCESS (proc)->buffer = buffer;
+  XPROCESS (proc)->command = Flist (nargs - 2,
+				    args + 2);
+
+  /* Make the process marker point into the process buffer (if any).  */
+  if (!NILP (buffer))
+    Fset_marker (XPROCESS (proc)->mark,
+		 make_int (BUF_ZV (XBUFFER (buffer))), buffer);
+
+  /* If an error occurs and we can't start the process, we want to
+     remove it from the process list.  This means that each error
+     check in create_process doesn't need to call remove_process
+     itself; it's all taken care of here.  */
+  record_unwind_protect (start_process_unwind, proc);
+
+  create_process (proc, args + 3, nargs - 3, program, current_dir);
+
+  UNGCPRO;
+  return unbind_to (speccount, proc);
+}
+
+
+#ifdef HAVE_SOCKETS
+
+
+/* #### The network support is fairly synthetical. What we actually
+   need is a single function, which supports all datagram, stream and
+   packet stream connections, arbitrary protocol families should they
+   be supported by the target system, multicast groups, in both data
+   and control rooted/nonrooted flavors, service quality etc whatever
+   is supported by the underlying network.
+
+   It must accept a property list describing the connection. The current
+   functions must then go to lisp and provide a suitable list for the
+   generalized connection function.
+
+   Both UNIX and Win32 support BSD sockets, and there are many extensions
+   available (Sockets 2 spec).
+
+   A todo is define a consistent set of properties abstracting a
+   network connection.   -kkm
+*/
+
+
+/* open a TCP network connection to a given HOST/SERVICE.  Treated
+   exactly like a normal process when reading and writing.  Only
+   differences are in status display and process deletion.  A network
+   connection has no PID; you cannot signal it.  All you can do is
+   deactivate and close it via delete-process */
+
+DEFUN ("open-network-stream-internal", Fopen_network_stream_internal, 4, 5, 0, /*
+Open a TCP connection for a service to a host.
+Return a subprocess-object to represent the connection.
+Input and output work as for subprocesses; `delete-process' closes it.
+
+NAME is name for process.  It is modified if necessary to make it unique.
+BUFFER is the buffer (or buffer-name) to associate with the process.
+ Process output goes at end of that buffer, unless you specify
+ an output stream or filter function to handle the output.
+ BUFFER may also be nil, meaning that this process is not associated
+ with any buffer.
+Third arg is name of the host to connect to, or its IP address.
+Fourth arg SERVICE is name of the service desired, or an integer
+ specifying a port number to connect to.
+Fifth argument PROTOCOL is a network protocol.  Currently 'tcp
+ (Transmission Control Protocol) and 'udp (User Datagram Protocol) are
+ supported.  When omitted, 'tcp is assumed.
+
+Ouput via `process-send-string' and input via buffer or filter (see
+`set-process-filter') are stream-oriented.  That means UDP datagrams are
+not guaranteed to be sent and received in discrete packets. (But small
+datagrams around 500 bytes that are not truncated by `process-send-string'
+are usually fine.)  Note further that UDP protocol does not guard against
+lost packets.
+*/
+       (name, buffer, host, service, protocol))
+{
+  /* !!#### This function has not been Mule-ized */
+  /* This function can GC */
+  Lisp_Object proc = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, ngcpro1;
+  void *inch, *outch;
+
+  GCPRO5 (name, buffer, host, service, protocol);
+  CHECK_STRING (name);
+
+  if (NILP(protocol))
+    protocol = Qtcp;
+  else
+    CHECK_SYMBOL (protocol);
+
+  /* Since this code is inside HAVE_SOCKETS, existence of
+     open_network_stream is mandatory */
+  PROCMETH (open_network_stream, (name, host, service, protocol,
+				  &inch, &outch));
+
+  if (!NILP (buffer))
+    buffer = Fget_buffer_create (buffer);
+  proc = make_process_internal (name);
+  NGCPRO1 (proc);
+
+  XPROCESS (proc)->pid = Fcons (service, host);
+  XPROCESS (proc)->buffer = buffer;
+  init_process_io_handles (XPROCESS (proc), (void*)inch, (void*)outch,
+			   STREAM_NETWORK_CONNECTION);
+
+  event_stream_select_process (XPROCESS (proc));
+
+  UNGCPRO;
+  NUNGCPRO;
+  return proc;
+}
+
+#ifdef HAVE_MULTICAST
+
+DEFUN ("open-multicast-group-internal", Fopen_multicast_group_internal, 5, 5, 0, /*
+Open a multicast connection on the specified dest/port/ttl.
+Return a subprocess-object to represent the connection.
+Input and output work as for subprocesses; `delete-process' closes it.
+
+NAME is name for process.  It is modified if necessary to make it unique.
+BUFFER is the buffer (or buffer-name) to associate with the process.
+ Process output goes at end of that buffer, unless you specify
+ an output stream or filter function to handle the output.
+ BUFFER may also be nil, meaning that this process is not associated
+ with any buffer.
+Third, fourth and fifth args are the multicast destination group, port and ttl.
+ dest must be an internet address between 224.0.0.0 and 239.255.255.255
+ port is a communication port like in traditional unicast
+ ttl is the time-to-live (15 for site, 63 for region and 127 for world)
+*/
+       (name, buffer, dest, port, ttl))
+{
+  /* !!#### This function has not been Mule-ized */
+  /* This function can GC */
+  Lisp_Object proc = Qnil;
+  struct gcpro gcpro1;
+  void *inch, *outch;
+
+  CHECK_STRING (name);
+
+  /* Since this code is inside HAVE_MULTICAST, existence of
+     open_network_stream is mandatory */
+  PROCMETH (open_multicast_group, (name, dest, port, ttl,
+				   &inch, &outch));
+
+  if (!NILP (buffer))
+    buffer = Fget_buffer_create (buffer);
+
+  proc = make_process_internal (name);
+  GCPRO1 (proc);
+
+  XPROCESS (proc)->pid = Fcons (port, dest);
+  XPROCESS (proc)->buffer = buffer;
+  init_process_io_handles (XPROCESS (proc), (void*)inch, (void*)outch,
+			   STREAM_NETWORK_CONNECTION);
+
+  event_stream_select_process (XPROCESS (proc));
+
+  UNGCPRO;
+  return proc;
+}
+#endif /* HAVE_MULTICAST */
+
+#endif	/* HAVE_SOCKETS */
+
+Lisp_Object
+canonicalize_host_name (Lisp_Object host)
+{
+  return PROCMETH_OR_GIVEN (canonicalize_host_name, (host), host);
+}
+
+
+DEFUN ("set-process-window-size", Fset_process_window_size, 3, 3, 0, /*
+Tell PROCESS that it has logical window size HEIGHT and WIDTH.
+*/
+       (proc, height, width))
+{
+  CHECK_PROCESS (proc);
+  CHECK_NATNUM (height);
+  CHECK_NATNUM (width);
+  return
+    MAYBE_INT_PROCMETH (set_window_size, (XPROCESS (proc), XINT (height), XINT (width))) <= 0
+    ? Qnil : Qt;
+}
+
+
+/************************************************************************/
+/*                              Process I/O                             */
+/************************************************************************/
+
+/* Read pending output from the process channel,
+   starting with our buffered-ahead character if we have one.
+   Yield number of characters read.
+
+   This function reads at most 1024 bytes.
+   If you want to read all available subprocess output,
+   you must call it repeatedly until it returns zero.  */
+
+Charcount
+read_process_output (Lisp_Object proc)
+{
+  /* This function can GC */
+  Bytecount nbytes, nchars;
+  Bufbyte chars[1024];
+  Lisp_Object outstream;
+  struct Lisp_Process *p = XPROCESS (proc);
+
+  /* If there is a lot of output from the subprocess, the loop in
+     execute_internal_event() might call read_process_output() more
+     than once.  If the filter that was executed from one of these
+     calls set the filter to t, we have to stop now.  Return -1 rather
+     than 0 so execute_internal_event() doesn't close the process.
+     Really, the loop in execute_internal_event() should check itself
+     for a process-filter change, like in status_notify(); but the
+     struct Lisp_Process is not exported outside of this file. */
+  if (NILP(p->pipe_instream))
+    return -1; /* already closed */
+
+  if (!NILP (p->filter) && (p->filter_does_read))
+    {
+      Lisp_Object filter_result;
+
+      /* Some weird FSFmacs crap here with
+	 Vdeactivate_mark and current_buffer->keymap */
+      running_asynch_code = 1;
+      filter_result = call2_trapping_errors ("Error in process filter",
+					     p->filter, proc, Qnil);
+      running_asynch_code = 0;
+      restore_match_data ();
+      CHECK_INT (filter_result);
+      return XINT (filter_result);
+    }
+
+  nbytes = Lstream_read (XLSTREAM (DATA_INSTREAM(p)), chars, sizeof (chars));
+  if (nbytes <= 0) return nbytes;
+
+  nchars = bytecount_to_charcount (chars, nbytes);
+  outstream = p->filter;
+  if (!NILP (outstream))
+    {
+      /* We used to bind inhibit-quit to t here, but
+	 call2_trapping_errors() does that for us. */
+      running_asynch_code = 1;
+      call2_trapping_errors ("Error in process filter",
+			     outstream, proc, make_string (chars, nbytes));
+      running_asynch_code = 0;
+      restore_match_data ();
+      return nchars;
+    }
+
+  /* If no filter, write into buffer if it isn't dead.  */
+  if (!NILP (p->buffer) && BUFFER_LIVE_P (XBUFFER (p->buffer)))
+    {
+      Lisp_Object old_read_only = Qnil;
+      Bufpos old_point;
+      Bufpos old_begv;
+      Bufpos old_zv;
+      int old_zmacs_region_stays = zmacs_region_stays;
+      struct gcpro gcpro1, gcpro2;
+      struct buffer *buf = XBUFFER (p->buffer);
+
+      GCPRO2 (proc, old_read_only);
+
+      old_point = BUF_PT (buf);
+      old_begv = BUF_BEGV (buf);
+      old_zv = BUF_ZV (buf);
+      old_read_only = buf->read_only;
+      buf->read_only = Qnil;
+
+      /* Insert new output into buffer
+	 at the current end-of-output marker,
+	 thus preserving logical ordering of input and output.  */
+      if (XMARKER (p->mark)->buffer)
+	BUF_SET_PT (buf,
+		    bufpos_clip_to_bounds (old_begv, marker_position (p->mark),
+					   old_zv));
+      else
+	BUF_SET_PT (buf, old_zv);
+
+      /* If the output marker is outside of the visible region, save
+	 the restriction and widen.  */
+      if (! (BUF_BEGV (buf) <= BUF_PT (buf) &&
+	     BUF_PT (buf) <= BUF_ZV (buf)))
+	Fwiden (p->buffer);
+
+      /* Make sure opoint floats ahead of any new text, just as point
+	 would.  */
+      if (BUF_PT (buf) <= old_point)
+	old_point += nchars;
+
+      /* Insert after old_begv, but before old_zv.  */
+      if (BUF_PT (buf) < old_begv)
+	old_begv += nchars;
+      if (BUF_PT (buf) <= old_zv)
+	old_zv += nchars;
+
+#if 0
+      /* This screws up initial display of the window.  jla */
+
+      /* Insert before markers in case we are inserting where
+	 the buffer's mark is, and the user's next command is Meta-y.  */
+      buffer_insert_raw_string_1 (buf, -1, chars,
+				  nbytes, INSDEL_BEFORE_MARKERS);
+#else
+      buffer_insert_raw_string (buf, chars, nbytes);
+#endif
+
+      Fset_marker (p->mark, make_int (BUF_PT (buf)), p->buffer);
+
+      MARK_MODELINE_CHANGED;
+
+      /* If the restriction isn't what it should be, set it.  */
+      if (old_begv != BUF_BEGV (buf) || old_zv != BUF_ZV (buf))
+	{
+	  Fwiden(p->buffer);
+	  old_begv = bufpos_clip_to_bounds (BUF_BEG (buf),
+					    old_begv,
+					    BUF_Z (buf));
+	  old_zv = bufpos_clip_to_bounds (BUF_BEG (buf),
+					  old_zv,
+					  BUF_Z (buf));
+	  Fnarrow_to_region (make_int (old_begv), make_int (old_zv),
+			     p->buffer);
+	}
+
+      /* Handling the process output should not deactivate the mark.  */
+      zmacs_region_stays = old_zmacs_region_stays;
+      buf->read_only = old_read_only;
+      old_point = bufpos_clip_to_bounds (BUF_BEGV (buf),
+					 old_point,
+					 BUF_ZV (buf));
+      BUF_SET_PT (buf, old_point);
+
+      UNGCPRO;
+    }
+  return nchars;
+}
+
+/* Sending data to subprocess */
+
+/* send some data to process PROC.  If NONRELOCATABLE is non-NULL, it
+   specifies the address of the data.  Otherwise, the data comes from the
+   object RELOCATABLE (either a string or a buffer).  START and LEN
+   specify the offset and length of the data to send.
+
+   Note that START and LEN are in Bufpos's if RELOCATABLE is a buffer,
+   and in Bytecounts otherwise. */
+
+void
+send_process (Lisp_Object proc,
+              Lisp_Object relocatable, CONST Bufbyte *nonrelocatable,
+              int start, int len)
+{
+  /* This function can GC */
+  struct gcpro gcpro1, gcpro2;
+  Lisp_Object lstream = Qnil;
+
+  GCPRO2 (proc, lstream);
+
+  if (NILP (DATA_OUTSTREAM (XPROCESS (proc))))
+    signal_simple_error ("Process not open for writing", proc);
+
+  if (nonrelocatable)
+    lstream =
+      make_fixed_buffer_input_stream (nonrelocatable + start, len);
+  else if (BUFFERP (relocatable))
+    lstream = make_lisp_buffer_input_stream (XBUFFER (relocatable),
+					     start, start + len, 0);
+  else
+    lstream = make_lisp_string_input_stream (relocatable, start, len);
+
+  PROCMETH (send_process, (proc, XLSTREAM (lstream)));
+
+  UNGCPRO;
+  Lstream_delete (XLSTREAM (lstream));
+}
+
+DEFUN ("process-tty-name", Fprocess_tty_name, 1, 1, 0, /*
+Return the name of the terminal PROCESS uses, or nil if none.
+This is the terminal that the process itself reads and writes on,
+not the name of the pty that Emacs uses to talk with that terminal.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return MAYBE_LISP_PROCMETH (get_tty_name, (XPROCESS (proc)));
+}
+
+DEFUN ("set-process-buffer", Fset_process_buffer, 2, 2, 0, /*
+Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
+*/
+       (proc, buffer))
+{
+  CHECK_PROCESS (proc);
+  if (!NILP (buffer))
+    CHECK_BUFFER (buffer);
+  XPROCESS (proc)->buffer = buffer;
+  return buffer;
+}
+
+DEFUN ("process-buffer", Fprocess_buffer, 1, 1, 0, /*
+Return the buffer PROCESS is associated with.
+Output from PROCESS is inserted in this buffer
+unless PROCESS has a filter.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->buffer;
+}
+
+DEFUN ("process-mark", Fprocess_mark, 1, 1, 0, /*
+Return the marker for the end of the last output from PROCESS.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->mark;
+}
+
+void
+set_process_filter (Lisp_Object proc, Lisp_Object filter, int filter_does_read)
+{
+  CHECK_PROCESS (proc);
+  if (PROCESS_LIVE_P (proc)) {
+    if (EQ (filter, Qt))
+      event_stream_unselect_process (XPROCESS (proc));
+    else
+      event_stream_select_process (XPROCESS (proc));
+  }
+
+  XPROCESS (proc)->filter = filter;
+  XPROCESS (proc)->filter_does_read = filter_does_read;
+}
+
+DEFUN ("set-process-filter", Fset_process_filter, 2, 2, 0, /*
+Give PROCESS the filter function FILTER; nil means no filter.
+t means stop accepting output from the process.
+When a process has a filter, each time it does output
+the entire string of output is passed to the filter.
+The filter gets two arguments: the process and the string of output.
+If the process has a filter, its buffer is not used for output.
+*/
+       (proc, filter))
+{
+  set_process_filter (proc, filter, 0);
+  return filter;
+}
+
+DEFUN ("process-filter", Fprocess_filter, 1, 1, 0, /*
+Return the filter function of PROCESS; nil if none.
+See `set-process-filter' for more info on filter functions.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->filter;
+}
+
+DEFUN ("process-send-region", Fprocess_send_region, 3, 3, 0, /*
+Send current contents of region as input to PROCESS.
+PROCESS may be a process name or an actual process.
+Called from program, takes three arguments, PROCESS, START and END.
+If the region is more than 500 or so characters long,
+it is sent in several bunches.  This may happen even for shorter regions.
+Output from processes can arrive in between bunches.
+*/
+       (process, start, end))
+{
+  /* This function can GC */
+  Lisp_Object proc = get_process (process);
+  Bufpos st, en;
+
+  get_buffer_range_char (current_buffer, start, end, &st, &en, 0);
+
+  send_process (proc, Fcurrent_buffer (), 0,
+                st, en - st);
+  return Qnil;
+}
+
+DEFUN ("process-send-string", Fprocess_send_string, 2, 4, 0, /*
+Send PROCESS the contents of STRING as input.
+PROCESS may be a process name or an actual process.
+Optional arguments FROM and TO specify part of STRING, see `substring'.
+If STRING is more than 500 or so characters long,
+it is sent in several bunches.  This may happen even for shorter strings.
+Output from processes can arrive in between bunches.
+*/
+       (process, string, from, to))
+{
+  /* This function can GC */
+  Lisp_Object proc;
+  Bytecount len;
+  Bytecount bfr, bto;
+
+  proc = get_process (process);
+  CHECK_STRING (string);
+  get_string_range_byte (string, from, to, &bfr, &bto,
+			 GB_HISTORICAL_STRING_BEHAVIOR);
+  len = bto - bfr;
+
+  send_process (proc, string, 0, bfr, len);
+  return Qnil;
+}
+
+#ifdef FILE_CODING
+
+DEFUN ("process-input-coding-system", Fprocess_input_coding_system, 1, 1, 0, /*
+Return PROCESS's input coding system.
+*/
+       (process))
+{
+  process = get_process (process);
+  return decoding_stream_coding_system (XLSTREAM (XPROCESS (process)->coding_instream) );
+}
+
+DEFUN ("process-output-coding-system", Fprocess_output_coding_system, 1, 1, 0, /*
+Return PROCESS's output coding system.
+*/
+       (process))
+{
+  process = get_process (process);
+  return encoding_stream_coding_system (XLSTREAM (XPROCESS (process)->coding_outstream));
+}
+
+DEFUN ("process-coding-system", Fprocess_coding_system, 1, 1, 0, /*
+Return a pair of coding-system for decoding and encoding of PROCESS.
+*/
+       (process))
+{
+  process = get_process (process);
+  return Fcons (decoding_stream_coding_system
+		(XLSTREAM (XPROCESS (process)->coding_instream)),
+		encoding_stream_coding_system
+		(XLSTREAM (XPROCESS (process)->coding_outstream)));
+}
+
+DEFUN ("set-process-input-coding-system", Fset_process_input_coding_system,
+       2, 2, 0, /*
+Set PROCESS's input coding system to CODESYS.
+*/
+       (process, codesys))
+{
+  codesys = Fget_coding_system (codesys);
+  process = get_process (process);
+  set_decoding_stream_coding_system
+    (XLSTREAM (XPROCESS (process)->coding_instream), codesys);
+  return Qnil;
+}
+
+DEFUN ("set-process-output-coding-system", Fset_process_output_coding_system,
+       2, 2, 0, /*
+Set PROCESS's output coding system to CODESYS.
+*/
+       (process, codesys))
+{
+  codesys = Fget_coding_system (codesys);
+  process = get_process (process);
+  set_encoding_stream_coding_system
+    (XLSTREAM (XPROCESS (process)->coding_outstream), codesys);
+  return Qnil;
+}
+
+DEFUN ("set-process-coding-system", Fset_process_coding_system,
+       1, 3, 0, /*
+Set coding-systems of PROCESS to DECODING and ENCODING.
+*/
+       (process, decoding, encoding))
+{
+  if (!NILP (decoding))
+    Fset_process_input_coding_system (process, decoding);
+
+  if (!NILP (encoding))
+    Fset_process_output_coding_system (process, encoding);
+
+  return Qnil;
+}
+
+#endif /* FILE_CODING */
+
+/************************************************************************/
+/*                             process status                           */
+/************************************************************************/
+
+static Lisp_Object
+exec_sentinel_unwind (Lisp_Object datum)
+{
+  struct Lisp_Cons *d = XCONS (datum);
+  XPROCESS (d->car)->sentinel = d->cdr;
+  free_cons (d);
+  return Qnil;
+}
+
+static void
+exec_sentinel (Lisp_Object proc, Lisp_Object reason)
+{
+  /* This function can GC */
+  int speccount = specpdl_depth ();
+  struct Lisp_Process *p = XPROCESS (proc);
+  Lisp_Object sentinel = p->sentinel;
+
+  if (NILP (sentinel))
+    return;
+
+  /* Some weird FSFmacs crap here with
+     Vdeactivate_mark and current_buffer->keymap */
+
+  /* Zilch the sentinel while it's running, to avoid recursive invocations;
+     assure that it gets restored no matter how the sentinel exits.  */
+  p->sentinel = Qnil;
+  record_unwind_protect (exec_sentinel_unwind, noseeum_cons (proc, sentinel));
+  /* We used to bind inhibit-quit to t here, but call2_trapping_errors()
+     does that for us. */
+  running_asynch_code = 1;
+  call2_trapping_errors ("Error in process sentinel", sentinel, proc, reason);
+  running_asynch_code = 0;
+  restore_match_data ();
+  unbind_to (speccount, Qnil);
+}
+
+DEFUN ("set-process-sentinel", Fset_process_sentinel, 2, 2, 0, /*
+Give PROCESS the sentinel SENTINEL; nil for none.
+The sentinel is called as a function when the process changes state.
+It gets two arguments: the process, and a string describing the change.
+*/
+       (proc, sentinel))
+{
+  CHECK_PROCESS (proc);
+  XPROCESS (proc)->sentinel = sentinel;
+  return sentinel;
+}
+
+DEFUN ("process-sentinel", Fprocess_sentinel, 1, 1, 0, /*
+Return the sentinel of PROCESS; nil if none.
+See `set-process-sentinel' for more info on sentinels.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->sentinel;
+}
+
+
+CONST char *
+signal_name (int signum)
+{
+  if (signum >= 0 && signum < NSIG)
+    return (CONST char *) sys_siglist[signum];
+
+  return (CONST char *) GETTEXT ("unknown signal");
+}
+
+void
+update_process_status (Lisp_Object p,
+		       Lisp_Object status_symbol,
+		       int exit_code,
+		       int core_dumped)
+{
+  XPROCESS (p)->tick++;
+  process_tick++;
+  XPROCESS (p)->status_symbol = status_symbol;
+  XPROCESS (p)->exit_code = exit_code;
+  XPROCESS (p)->core_dumped = core_dumped;
+}
+
+/* Return a string describing a process status list.  */
+
+static Lisp_Object
+status_message (struct Lisp_Process *p)
+{
+  Lisp_Object symbol = p->status_symbol;
+  int code = p->exit_code;
+  int coredump = p->core_dumped;
+  Lisp_Object string, string2;
+
+  if (EQ (symbol, Qsignal) || EQ (symbol, Qstop))
+    {
+      string = build_string (signal_name (code));
+      if (coredump)
+	string2 = build_translated_string (" (core dumped)\n");
+      else
+	string2 = build_string ("\n");
+      set_string_char (XSTRING (string), 0,
+		       DOWNCASE (current_buffer,
+				 string_char (XSTRING (string), 0)));
+      return concat2 (string, string2);
+    }
+  else if (EQ (symbol, Qexit))
+    {
+      if (code == 0)
+	return build_translated_string ("finished\n");
+      string = Fnumber_to_string (make_int (code));
+      if (coredump)
+	string2 = build_translated_string (" (core dumped)\n");
+      else
+	string2 = build_string ("\n");
+      return concat2 (build_translated_string ("exited abnormally with code "),
+		      concat2 (string, string2));
+    }
+  else
+    return Fcopy_sequence (Fsymbol_name (symbol));
+}
+
+/* Tell status_notify() to check for terminated processes.  We do this
+   because on some systems we sometimes miss SIGCHLD calls. (Not sure
+   why.) */
+
+void
+kick_status_notify (void)
+{
+  process_tick++;
+}
+
+
+/* Report all recent events of a change in process status
+   (either run the sentinel or output a message).
+   This is done while Emacs is waiting for keyboard input.  */
+
+void
+status_notify (void)
+{
+  /* This function can GC */
+  Lisp_Object tail = Qnil;
+  Lisp_Object symbol = Qnil;
+  Lisp_Object msg = Qnil;
+  struct gcpro gcpro1, gcpro2, gcpro3;
+  /* process_tick is volatile, so we have to remember it now.
+     Otherwise, we get a race condition is SIGCHLD happens during
+     this function.
+
+     (Actually, this is not the case anymore.  The code to
+     update the process structures has been moved out of the
+     SIGCHLD handler.  But for the moment I'm leaving this
+     stuff in -- it can't hurt.) */
+  int temp_process_tick;
+
+  MAYBE_PROCMETH (reap_exited_processes, ());
+
+  temp_process_tick = process_tick;
+
+  if (update_tick == temp_process_tick)
+    return;
+
+  /* We need to gcpro tail; if read_process_output calls a filter
+     which deletes a process and removes the cons to which tail points
+     from Vprocess_alist, and then causes a GC, tail is an unprotected
+     reference.  */
+  GCPRO3 (tail, symbol, msg);
+
+  for (tail = Vprocess_list; CONSP (tail); tail = XCDR (tail))
+    {
+      Lisp_Object proc = XCAR (tail);
+      struct Lisp_Process *p = XPROCESS (proc);
+      /* p->tick is also volatile.  Same thing as above applies. */
+      int this_process_tick;
+
+      /* #### extra check for terminated processes, in case a SIGCHLD
+	 got missed (this seems to happen sometimes, I'm not sure why).
+       */
+      if (INTP (p->pid))
+	MAYBE_PROCMETH (update_status_if_terminated, (p));
+
+      this_process_tick = p->tick;
+      if (this_process_tick != p->update_tick)
+	{
+	  p->update_tick = this_process_tick;
+
+	  /* If process is still active, read any output that remains.  */
+          while (!EQ (p->filter, Qt)
+		 && read_process_output (proc) > 0)
+            ;
+
+	  /* Get the text to use for the message.  */
+	  msg = status_message (p);
+
+	  /* If process is terminated, deactivate it or delete it.  */
+	  symbol = p->status_symbol;
+
+	  if (EQ (symbol, Qsignal)
+              || EQ (symbol, Qexit))
+	    {
+	      if (delete_exited_processes)
+		remove_process (proc);
+	      else
+		deactivate_process (proc);
+	    }
+
+	  /* Now output the message suitably.  */
+	  if (!NILP (p->sentinel))
+	    exec_sentinel (proc, msg);
+	  /* Don't bother with a message in the buffer
+	     when a process becomes runnable.  */
+	  else if (!EQ (symbol, Qrun) && !NILP (p->buffer))
+	    {
+	      Lisp_Object old_read_only = Qnil;
+	      Lisp_Object old = Fcurrent_buffer ();
+	      Bufpos opoint;
+              struct gcpro ngcpro1, ngcpro2;
+
+	      /* Avoid error if buffer is deleted
+		 (probably that's why the process is dead, too) */
+	      if (!BUFFER_LIVE_P (XBUFFER (p->buffer)))
+		continue;
+
+              NGCPRO2 (old, old_read_only);
+	      Fset_buffer (p->buffer);
+	      opoint = BUF_PT (current_buffer);
+	      /* Insert new output into buffer
+		 at the current end-of-output marker,
+		 thus preserving logical ordering of input and output.  */
+	      if (XMARKER (p->mark)->buffer)
+		BUF_SET_PT (current_buffer, marker_position (p->mark));
+	      else
+		BUF_SET_PT (current_buffer, BUF_ZV (current_buffer));
+	      if (BUF_PT (current_buffer) <= opoint)
+		opoint += (string_char_length (XSTRING (msg))
+                           + string_char_length (XSTRING (p->name))
+                           + 10);
+
+	      old_read_only = current_buffer->read_only;
+	      current_buffer->read_only = Qnil;
+	      buffer_insert_c_string (current_buffer, "\nProcess ");
+	      Finsert (1, &p->name);
+	      buffer_insert_c_string (current_buffer, " ");
+	      Finsert (1, &msg);
+	      current_buffer->read_only = old_read_only;
+	      Fset_marker (p->mark, make_int (BUF_PT (current_buffer)),
+			   p->buffer);
+
+	      opoint = bufpos_clip_to_bounds(BUF_BEGV (XBUFFER (p->buffer)),
+					     opoint,
+					     BUF_ZV (XBUFFER (p->buffer)));
+	      BUF_SET_PT (current_buffer, opoint);
+	      Fset_buffer (old);
+              NUNGCPRO;
+	    }
+	}
+    } /* end for */
+
+  /* in case buffers use %s in modeline-format */
+  MARK_MODELINE_CHANGED;
+  redisplay ();
+
+  update_tick = temp_process_tick;
+
+  UNGCPRO;
+}
+
+DEFUN ("process-status", Fprocess_status, 1, 1, 0, /*
+Return the status of PROCESS.
+This is a symbol, one of these:
+
+run    -- for a process that is running.
+stop   -- for a process stopped but continuable.
+exit   -- for a process that has exited.
+signal -- for a process that has got a fatal signal.
+open   -- for a network stream connection that is open.
+closed -- for a network stream connection that is closed.
+nil    -- if arg is a process name and no such process exists.
+
+PROCESS may be a process, a buffer, the name of a process or buffer, or
+nil, indicating the current buffer's process.
+*/
+       (proc))
+{
+  Lisp_Object status_symbol;
+
+  if (STRINGP (proc))
+    proc = Fget_process (proc);
+  else
+    proc = get_process (proc);
+
+  if (NILP (proc))
+    return Qnil;
+
+  status_symbol = XPROCESS (proc)->status_symbol;
+  if (network_connection_p (proc))
+    {
+      if (EQ (status_symbol, Qrun))
+	status_symbol = Qopen;
+      else if (EQ (status_symbol, Qexit))
+	status_symbol = Qclosed;
+    }
+  return status_symbol;
+}
+
+DEFUN ("process-exit-status", Fprocess_exit_status, 1, 1, 0, /*
+Return the exit status of PROCESS or the signal number that killed it.
+If PROCESS has not yet exited or died, return 0.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return make_int (XPROCESS (proc)->exit_code);
+}
+
+
+
+/* send a signal number SIGNO to PROCESS.
+   CURRENT_GROUP means send to the process group that currently owns
+   the terminal being used to communicate with PROCESS.
+   This is used for various commands in shell mode.
+   If NOMSG is zero, insert signal-announcements into process's buffers
+   right away.
+
+   If we can, we try to signal PROCESS by sending control characters
+   down the pty.  This allows us to signal inferiors who have changed
+   their uid, for which killpg would return an EPERM error.  */
+
+static void
+process_send_signal (Lisp_Object process, int signo,
+                     int current_group, int nomsg)
+{
+  /* This function can GC */
+  Lisp_Object proc = get_process (process);
+
+  if (network_connection_p (proc))
+    error ("Network connection %s is not a subprocess",
+	   XSTRING_DATA (XPROCESS(proc)->name));
+  if (!PROCESS_LIVE_P (proc))
+    error ("Process %s is not active",
+	   XSTRING_DATA (XPROCESS(proc)->name));
+
+  MAYBE_PROCMETH (kill_child_process, (proc, signo, current_group, nomsg));
+}
+
+DEFUN ("interrupt-process", Finterrupt_process, 0, 2, 0, /*
+Interrupt process PROCESS.  May be process or name of one.
+Nil or no arg means current buffer's process.
+Second arg CURRENT-GROUP non-nil means send signal to
+the current process-group of the process's controlling terminal
+rather than to the process's own process group.
+If the process is a shell, this means interrupt current subjob
+rather than the shell.
+*/
+       (process, current_group))
+{
+  /* This function can GC */
+  process_send_signal (process, SIGINT, !NILP (current_group), 0);
+  return process;
+}
+
+DEFUN ("kill-process", Fkill_process, 0, 2, 0, /*
+Kill process PROCESS.  May be process or name of one.
+See function `interrupt-process' for more details on usage.
+*/
+       (process, current_group))
+{
+  /* This function can GC */
+#ifdef SIGKILL
+  process_send_signal (process, SIGKILL, !NILP (current_group), 0);
+#else
+  error ("kill-process: Not supported on this system");
+#endif
+  return process;
+}
+
+DEFUN ("quit-process", Fquit_process, 0, 2, 0, /*
+Send QUIT signal to process PROCESS.  May be process or name of one.
+See function `interrupt-process' for more details on usage.
+*/
+       (process, current_group))
+{
+  /* This function can GC */
+#ifdef SIGQUIT
+  process_send_signal (process, SIGQUIT, !NILP (current_group), 0);
+#else
+  error ("quit-process: Not supported on this system");
+#endif
+  return process;
+}
+
+DEFUN ("stop-process", Fstop_process, 0, 2, 0, /*
+Stop process PROCESS.  May be process or name of one.
+See function `interrupt-process' for more details on usage.
+*/
+       (process, current_group))
+{
+  /* This function can GC */
+#ifdef SIGTSTP
+  process_send_signal (process, SIGTSTP, !NILP (current_group), 0);
+#else
+  error ("stop-process: Not supported on this system");
+#endif
+  return process;
+}
+
+DEFUN ("continue-process", Fcontinue_process, 0, 2, 0, /*
+Continue process PROCESS.  May be process or name of one.
+See function `interrupt-process' for more details on usage.
+*/
+       (process, current_group))
+{
+  /* This function can GC */
+#ifdef SIGCONT
+  process_send_signal (process, SIGCONT, !NILP (current_group), 0);
+#else
+  error ("continue-process: Not supported on this system");
+#endif
+  return process;
+}
+
+DEFUN ("signal-process", Fsignal_process, 2, 2,
+       "nProcess number: \nnSignal code: ", /*
+Send the process with process id PID the signal with code SIGCODE.
+PID must be an integer.  The process need not be a child of this Emacs.
+SIGCODE may be an integer, or a symbol whose name is a signal name.
+*/
+       (pid, sigcode))
+{
+  CHECK_INT (pid);
+
+  if (INTP (sigcode))
+    ;
+  else
+    {
+      Bufbyte *name;
+
+      CHECK_SYMBOL (sigcode);
+      name = string_data (XSYMBOL (sigcode)->name);
+
+#define handle_signal(signal)				\
+  else if (!strcmp ((CONST char *) name, #signal))	\
+    XSETINT (sigcode, signal)
+
+      if (0)
+	;
+      handle_signal (SIGINT);  /* ANSI */
+      handle_signal (SIGILL);  /* ANSI */
+      handle_signal (SIGABRT); /* ANSI */
+      handle_signal (SIGFPE);  /* ANSI */
+      handle_signal (SIGSEGV); /* ANSI */
+      handle_signal (SIGTERM); /* ANSI */
+
+#ifdef SIGHUP
+      handle_signal (SIGHUP);  /* POSIX */
+#endif
+#ifdef SIGQUIT
+      handle_signal (SIGQUIT); /* POSIX */
+#endif
+#ifdef SIGTRAP
+      handle_signal (SIGTRAP); /* POSIX */
+#endif
+#ifdef SIGKILL
+      handle_signal (SIGKILL); /* POSIX */
+#endif
+#ifdef SIGUSR1
+      handle_signal (SIGUSR1); /* POSIX */
+#endif
+#ifdef SIGUSR2
+      handle_signal (SIGUSR2); /* POSIX */
+#endif
+#ifdef SIGPIPE
+      handle_signal (SIGPIPE); /* POSIX */
+#endif
+#ifdef SIGALRM
+      handle_signal (SIGALRM); /* POSIX */
+#endif
+#ifdef SIGCHLD
+      handle_signal (SIGCHLD); /* POSIX */
+#endif
+#ifdef SIGCONT
+      handle_signal (SIGCONT); /* POSIX */
+#endif
+#ifdef SIGSTOP
+      handle_signal (SIGSTOP); /* POSIX */
+#endif
+#ifdef SIGTSTP
+      handle_signal (SIGTSTP); /* POSIX */
+#endif
+#ifdef SIGTTIN
+      handle_signal (SIGTTIN); /* POSIX */
+#endif
+#ifdef SIGTTOU
+      handle_signal (SIGTTOU); /* POSIX */
+#endif
+
+#ifdef SIGBUS
+      handle_signal (SIGBUS);  /* XPG5 */
+#endif
+#ifdef SIGPOLL
+      handle_signal (SIGPOLL); /* XPG5 */
+#endif
+#ifdef SIGPROF
+      handle_signal (SIGPROF); /* XPG5 */
+#endif
+#ifdef SIGSYS
+      handle_signal (SIGSYS);  /* XPG5 */
+#endif
+#ifdef SIGURG
+      handle_signal (SIGURG);  /* XPG5 */
+#endif
+#ifdef SIGXCPU
+      handle_signal (SIGXCPU); /* XPG5 */
+#endif
+#ifdef SIGXFSZ
+      handle_signal (SIGXFSZ); /* XPG5 */
+#endif
+#ifdef SIGVTALRM
+      handle_signal (SIGVTALRM); /* XPG5 */
+#endif
+
+#ifdef SIGIO
+      handle_signal (SIGIO); /* BSD 4.2 */
+#endif
+#ifdef SIGWINCH
+      handle_signal (SIGWINCH); /* BSD 4.3 */
+#endif
+
+#ifdef SIGEMT
+      handle_signal (SIGEMT);
+#endif
+#ifdef SIGINFO
+      handle_signal (SIGINFO);
+#endif
+#ifdef SIGHWE
+      handle_signal (SIGHWE);
+#endif
+#ifdef SIGPRE
+      handle_signal (SIGPRE);
+#endif
+#ifdef SIGUME
+      handle_signal (SIGUME);
+#endif
+#ifdef SIGDLK
+      handle_signal (SIGDLK);
+#endif
+#ifdef SIGCPULIM
+      handle_signal (SIGCPULIM);
+#endif
+#ifdef SIGIOT
+      handle_signal (SIGIOT);
+#endif
+#ifdef SIGLOST
+      handle_signal (SIGLOST);
+#endif
+#ifdef SIGSTKFLT
+      handle_signal (SIGSTKFLT);
+#endif
+#ifdef SIGUNUSED
+      handle_signal (SIGUNUSED);
+#endif
+#ifdef SIGDANGER
+      handle_signal (SIGDANGER); /* AIX */
+#endif
+#ifdef SIGMSG
+      handle_signal (SIGMSG);
+#endif
+#ifdef SIGSOUND
+      handle_signal (SIGSOUND);
+#endif
+#ifdef SIGRETRACT
+      handle_signal (SIGRETRACT);
+#endif
+#ifdef SIGGRANT
+      handle_signal (SIGGRANT);
+#endif
+#ifdef SIGPWR
+      handle_signal (SIGPWR);
+#endif
+      else
+	error ("Undefined signal name %s", name);
+    }
+
+#undef handle_signal
+
+  return make_int (PROCMETH_OR_GIVEN (kill_process_by_pid,
+				      (XINT (pid), XINT (sigcode)), -1));
+}
+
+DEFUN ("process-send-eof", Fprocess_send_eof, 0, 1, 0, /*
+Make PROCESS see end-of-file in its input.
+PROCESS may be a process, a buffer, the name of a process or buffer, or
+nil, indicating the current buffer's process.
+If PROCESS is a network connection, or is a process communicating
+through a pipe (as opposed to a pty), then you cannot send any more
+text to PROCESS after you call this function.
+*/
+       (process))
+{
+  /* This function can GC */
+  Lisp_Object proc = get_process (process);
+
+  /* Make sure the process is really alive.  */
+  if (! EQ (XPROCESS (proc)->status_symbol, Qrun))
+    error ("Process %s not running", XSTRING_DATA (XPROCESS (proc)->name));
+
+  if (!MAYBE_INT_PROCMETH (process_send_eof, (proc)))
+    {
+      if (!NILP (DATA_OUTSTREAM (XPROCESS (proc))))
+	{
+	  Lstream_close (XLSTREAM (DATA_OUTSTREAM (XPROCESS (proc))));
+	  event_stream_delete_stream_pair (Qnil, XPROCESS (proc)->pipe_outstream);
+	  XPROCESS (proc)->pipe_outstream = Qnil;
+#ifdef FILE_CODING
+	  XPROCESS (proc)->coding_outstream = Qnil;
+#endif
+	}
+    }
+
+  return process;
+}
+
+
+/************************************************************************/
+/*                          deleting a process                          */
+/************************************************************************/
+
+void
+deactivate_process (Lisp_Object proc)
+{
+  struct Lisp_Process *p = XPROCESS (proc);
+  USID usid;
+
+  /* It's possible that we got as far in the process-creation
+     process as creating the descriptors but didn't get so
+     far as selecting the process for input.  In this
+     case, p->pid is nil: p->pid is set at the same time that
+     the process is selected for input. */
+  /* #### The comment does not look correct. event_stream_unselect_process
+     is guarded by process->selected, so this is not a problem. - kkm*/
+  /* Must call this before setting the streams to nil */
+  event_stream_unselect_process (p);
+
+  if (!NILP (DATA_OUTSTREAM (p)))
+    Lstream_close (XLSTREAM (DATA_OUTSTREAM (p)));
+  if (!NILP (DATA_INSTREAM (p)))
+    Lstream_close (XLSTREAM (DATA_INSTREAM (p)));
+
+  /* Provide minimal implementation for deactivate_process
+     if there's no process-specific one */
+  if (HAS_PROCMETH_P (deactivate_process))
+    usid = PROCMETH (deactivate_process, (p));
+  else
+    usid = event_stream_delete_stream_pair (p->pipe_instream,
+					    p->pipe_outstream);
+
+  if (usid != USID_DONTHASH)
+    remhash ((CONST void*)usid, usid_to_process);
+
+  p->pipe_instream = Qnil;
+  p->pipe_outstream = Qnil;
+#ifdef FILE_CODING
+  p->coding_instream = Qnil;
+  p->coding_outstream = Qnil;
+#endif
+}
+
+static void
+remove_process (Lisp_Object proc)
+{
+  Vprocess_list = delq_no_quit (proc, Vprocess_list);
+  Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil);
+
+  deactivate_process (proc);
+}
+
+DEFUN ("delete-process", Fdelete_process, 1, 1, 0, /*
+Delete PROCESS: kill it and forget about it immediately.
+PROCESS may be a process or the name of one, or a buffer name.
+*/
+       (proc))
+{
+  /* This function can GC */
+  struct Lisp_Process *p;
+  proc = get_process (proc);
+  p = XPROCESS (proc);
+  if (network_connection_p (proc))
+    {
+      p->status_symbol = Qexit;
+      p->exit_code = 0;
+      p->core_dumped = 0;
+      p->tick++;
+      process_tick++;
+    }
+  else if (!NILP(p->pipe_instream))
+    {
+      Fkill_process (proc, Qnil);
+      /* Do this now, since remove_process will make sigchld_handler do nothing.  */
+      p->status_symbol = Qsignal;
+      p->exit_code = SIGKILL;
+      p->core_dumped = 0;
+      p->tick++;
+      process_tick++;
+      status_notify ();
+    }
+  remove_process (proc);
+  return Qnil;
+}
+
+/* Kill all processes associated with `buffer'.
+ If `buffer' is nil, kill all processes  */
+
+void
+kill_buffer_processes (Lisp_Object buffer)
+{
+  Lisp_Object tail;
+
+  for (tail = Vprocess_list; CONSP (tail);
+       tail = XCDR (tail))
+    {
+      Lisp_Object proc = XCAR (tail);
+      if (PROCESSP (proc)
+	  && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer)))
+	{
+	  if (network_connection_p (proc))
+	    Fdelete_process (proc);
+	  else if (!NILP (XPROCESS (proc)->pipe_instream))
+	    process_send_signal (proc, SIGHUP, 0, 1);
+	}
+    }
+}
+
+DEFUN ("process-kill-without-query", Fprocess_kill_without_query, 1, 2, 0, /*
+Say no query needed if PROCESS is running when Emacs is exited.
+Optional second argument if non-nil says to require a query.
+Value is t if a query was formerly required.
+*/
+       (proc, require_query_p))
+{
+  int tem;
+
+  CHECK_PROCESS (proc);
+  tem = XPROCESS (proc)->kill_without_query;
+  XPROCESS (proc)->kill_without_query = NILP (require_query_p);
+
+  return tem ? Qnil : Qt;
+}
+
+DEFUN ("process-kill-without-query-p", Fprocess_kill_without_query_p, 1, 1, 0, /*
+Whether PROC will be killed without query if running when emacs is exited.
+*/
+       (proc))
+{
+  CHECK_PROCESS (proc);
+  return XPROCESS (proc)->kill_without_query ? Qt : Qnil;
+}
+
+
+/* This is not named init_process in order to avoid a conflict with NS 3.3 */
+void
+init_xemacs_process (void)
+{
+  MAYBE_PROCMETH (init_process, ());
+
+  Vprocess_list = Qnil;
+
+  if (usid_to_process)
+    clrhash (usid_to_process);
+  else
+    usid_to_process = make_hash_table (32);
+}
+
+#if 0
+
+xxDEFUN ("process-connection", Fprocess_connection, 0, 1, 0, /*
+Return the connection type of `PROCESS'.  This can be nil (pipe),
+t or pty (pty) or stream (socket connection).
+*/
+	 (process))
+{
+  return XPROCESS (process)->type;
+}
+
+#endif /* 0 */
+
+void
+syms_of_process (void)
+{
+  defsymbol (&Qprocessp, "processp");
+  defsymbol (&Qrun, "run");
+  defsymbol (&Qstop, "stop");
+  defsymbol (&Qopen, "open");
+  defsymbol (&Qclosed, "closed");
+
+  defsymbol (&Qtcp, "tcp");
+  defsymbol (&Qudp, "udp");
+
+#ifdef HAVE_MULTICAST
+  defsymbol(&Qmulticast, "multicast"); /* Used for occasional warnings */
+#endif
+
+  DEFSUBR (Fprocessp);
+  DEFSUBR (Fget_process);
+  DEFSUBR (Fget_buffer_process);
+  DEFSUBR (Fdelete_process);
+  DEFSUBR (Fprocess_status);
+  DEFSUBR (Fprocess_exit_status);
+  DEFSUBR (Fprocess_id);
+  DEFSUBR (Fprocess_name);
+  DEFSUBR (Fprocess_tty_name);
+  DEFSUBR (Fprocess_command);
+  DEFSUBR (Fset_process_buffer);
+  DEFSUBR (Fprocess_buffer);
+  DEFSUBR (Fprocess_mark);
+  DEFSUBR (Fset_process_filter);
+  DEFSUBR (Fprocess_filter);
+  DEFSUBR (Fset_process_window_size);
+  DEFSUBR (Fset_process_sentinel);
+  DEFSUBR (Fprocess_sentinel);
+  DEFSUBR (Fprocess_kill_without_query);
+  DEFSUBR (Fprocess_kill_without_query_p);
+  DEFSUBR (Fprocess_list);
+  DEFSUBR (Fstart_process_internal);
+#ifdef HAVE_SOCKETS
+  DEFSUBR (Fopen_network_stream_internal);
+#ifdef HAVE_MULTICAST
+  DEFSUBR (Fopen_multicast_group_internal);
+#endif /* HAVE_MULTICAST */
+#endif /* HAVE_SOCKETS */
+  DEFSUBR (Fprocess_send_region);
+  DEFSUBR (Fprocess_send_string);
+  DEFSUBR (Finterrupt_process);
+  DEFSUBR (Fkill_process);
+  DEFSUBR (Fquit_process);
+  DEFSUBR (Fstop_process);
+  DEFSUBR (Fcontinue_process);
+  DEFSUBR (Fprocess_send_eof);
+  DEFSUBR (Fsignal_process);
+/*  DEFSUBR (Fprocess_connection); */
+#ifdef FILE_CODING
+  DEFSUBR (Fprocess_input_coding_system);
+  DEFSUBR (Fprocess_output_coding_system);
+  DEFSUBR (Fset_process_input_coding_system);
+  DEFSUBR (Fset_process_output_coding_system);
+  DEFSUBR (Fprocess_coding_system);
+  DEFSUBR (Fset_process_coding_system);
+#endif /* FILE_CODING */
+}
+
+void
+vars_of_process (void)
+{
+  Fprovide (intern ("subprocesses"));
+#ifdef HAVE_SOCKETS
+  Fprovide (intern ("network-streams"));
+#ifdef HAVE_MULTICAST
+  Fprovide (intern ("multicast"));
+#endif /* HAVE_MULTICAST */
+#endif /* HAVE_SOCKETS */
+  staticpro (&Vprocess_list);
+
+  DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes /*
+*Non-nil means delete processes immediately when they exit.
+nil means don't delete them until `list-processes' is run.
+*/ );
+
+  delete_exited_processes = 1;
+
+  DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type /*
+Control type of device used to communicate with subprocesses.
+Values are nil to use a pipe, or t or `pty' to use a pty.
+The value has no effect if the system has no ptys or if all ptys are busy:
+then a pipe is used in any case.
+The value takes effect when `start-process' is called.
+*/ );
+  Vprocess_connection_type = Qt;
+
+  DEFVAR_BOOL ("windowed-process-io", &windowed_process_io /*
+Enables input/output on standard handles of a windowed process.
+When this variable is nil (the default), XEmacs does not attempt to read
+standard output handle of a windowed process. Instead, the process is
+immediately marked as exited immediately upon successful launching. This is
+done because normal windowed processes do not use standard I/O, as they are
+not connected to any console.
+
+When launching a specially crafted windowed process, which expects to be
+launched by XEmacs, or by other program which pipes its standard input and
+output, this variable must be set to non-nil, in which case XEmacs will
+treat this process just like a console process.
+
+NOTE: You should never set this variable, only bind it.
+
+Only Windows processes can be "windowed" or "console". This variable has no
+effect on UNIX processes, because all UNIX processes are "console".
+*/ );
+  windowed_process_io = 0;
+
+#ifdef PROCESS_IO_BLOCKING
+  DEFVAR_LISP ("network-stream-blocking-port-list", &network_stream_blocking_port_list /*
+List of port numbers or port names to set a blocking I/O mode with connection.
+Nil value means to set a default(non-blocking) I/O mode.
+The value takes effect when `open-network-stream-internal' is called.
+*/ );
+  network_stream_blocking_port_list = Qnil;
+#endif	/* PROCESS_IO_BLOCKING */
+}
+
+#endif /* not NO_SUBPROCESSES */