process.c 201 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Asynchronous subprocess control for GNU Emacs.
2 3 4
   Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
                 1996, 1998, 1999, 2001, 2002, 2003, 2004,
                 2005 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
5 6 7 8 9

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
11 12 13 14 15 16 17 18 19
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
Lute Kamstra's avatar
Lute Kamstra committed
20 21
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */
Jim Blandy's avatar
Jim Blandy committed
22 23


24
#include <config.h>
25 26
#include <signal.h>

Jim Blandy's avatar
Jim Blandy committed
27 28 29 30 31 32 33 34
/* This file is split into two parts by the following preprocessor
   conditional.  The 'then' clause contains all of the support for
   asynchronous subprocesses.  The 'else' clause contains stub
   versions of some of the asynchronous subprocess routines that are
   often called elsewhere in Emacs, so we don't have to #ifdef the
   sections that call them.  */


Jim Blandy's avatar
Jim Blandy committed
35 36 37 38 39 40 41 42
#ifdef subprocesses

#include <stdio.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/types.h>		/* some typedefs are used in sys/file.h */
#include <sys/file.h>
#include <sys/stat.h>
Richard M. Stallman's avatar
Richard M. Stallman committed
43 44 45
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
Jim Blandy's avatar
Jim Blandy committed
46

47
#if defined(WINDOWSNT) || defined(UNIX98_PTYS)
48 49 50 51
#include <stdlib.h>
#include <fcntl.h>
#endif /* not WINDOWSNT */

Jim Blandy's avatar
Jim Blandy committed
52 53 54 55 56
#ifdef HAVE_SOCKETS	/* TCP connection support, if kernel can do it */
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
57 58 59
#ifdef NEED_NET_ERRNO_H
#include <net/errno.h>
#endif /* NEED_NET_ERRNO_H */
60 61

/* Are local (unix) sockets supported?  */
62
#if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
63 64 65 66 67 68 69 70
#if !defined (AF_LOCAL) && defined (AF_UNIX)
#define AF_LOCAL AF_UNIX
#endif
#ifdef AF_LOCAL
#define HAVE_LOCAL_SOCKETS
#include <sys/un.h>
#endif
#endif
Jim Blandy's avatar
Jim Blandy committed
71 72
#endif /* HAVE_SOCKETS */

73
/* TERM is a poor-man's SLIP, used on GNU/Linux.  */
74 75 76 77
#ifdef TERM
#include <client.h>
#endif

78 79
/* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
#ifdef HAVE_BROKEN_INET_ADDR
80 81 82 83 84 85 86
#define IN_ADDR struct in_addr
#define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
#else
#define IN_ADDR unsigned long
#define NUMERIC_ADDR_ERROR (numeric_addr == -1)
#endif

87
#if defined(BSD_SYSTEM) || defined(STRIDE)
Jim Blandy's avatar
Jim Blandy committed
88
#include <sys/ioctl.h>
89
#if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
Jim Blandy's avatar
Jim Blandy committed
90 91
#include <fcntl.h>
#endif /* HAVE_PTYS and no O_NDELAY */
92
#endif /* BSD_SYSTEM || STRIDE */
Jim Blandy's avatar
Jim Blandy committed
93

94 95 96 97
#ifdef BROKEN_O_NONBLOCK
#undef O_NONBLOCK
#endif /* BROKEN_O_NONBLOCK */

Jim Blandy's avatar
Jim Blandy committed
98 99 100 101
#ifdef NEED_BSDTTY
#include <bsdtty.h>
#endif

102 103 104 105 106 107 108 109 110 111 112
/* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
#ifdef HAVE_SOCKETS
#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
/* sys/ioctl.h may have been included already */
#ifndef SIOCGIFADDR
#include <sys/ioctl.h>
#endif
#include <net/if.h>
#endif
#endif

Jim Blandy's avatar
Jim Blandy committed
113 114 115
#ifdef IRIS
#include <sys/sysmacros.h>	/* for "minor" */
#endif /* not IRIS */
116

Dave Love's avatar
Dave Love committed
117 118 119
#ifdef HAVE_SYS_WAIT
#include <sys/wait.h>
#endif
Jim Blandy's avatar
Jim Blandy committed
120 121

#include "systime.h"
122
#include "systty.h"
Jim Blandy's avatar
Jim Blandy committed
123 124 125 126

#include "lisp.h"
#include "window.h"
#include "buffer.h"
Karl Heuer's avatar
Karl Heuer committed
127 128
#include "charset.h"
#include "coding.h"
Jim Blandy's avatar
Jim Blandy committed
129 130 131 132
#include "process.h"
#include "termhooks.h"
#include "termopts.h"
#include "commands.h"
133
#include "keyboard.h"
134
#include "frame.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
135
#include "blockinput.h"
Andreas Schwab's avatar
Andreas Schwab committed
136
#include "dispextern.h"
Kenichi Handa's avatar
Kenichi Handa committed
137
#include "composite.h"
Gerd Moellmann's avatar
Gerd Moellmann committed
138
#include "atimer.h"
Jim Blandy's avatar
Jim Blandy committed
139

140
Lisp_Object Qprocessp;
141
Lisp_Object Qrun, Qstop, Qsignal;
142
Lisp_Object Qopen, Qclosed, Qconnect, Qfailed, Qlisten;
143 144
Lisp_Object Qlocal, Qdatagram;
Lisp_Object QCname, QCbuffer, QChost, QCservice, QCtype;
145
Lisp_Object QClocal, QCremote, QCcoding;
146
Lisp_Object QCserver, QCnowait, QCnoquery, QCstop;
147
Lisp_Object QCsentinel, QClog, QCoptions, QCplist;
Kim F. Storm's avatar
Kim F. Storm committed
148
Lisp_Object QCfilter_multibyte;
149
Lisp_Object Qlast_nonmenu_event;
150 151 152 153
/* QCfamily is declared and initialized in xfaces.c,
   QCfilter in keyboard.c.  */
extern Lisp_Object QCfamily, QCfilter;

Jim Blandy's avatar
Jim Blandy committed
154 155
/* Qexit is declared and initialized in eval.c.  */

156 157 158 159 160
/* QCfamily is defined in xfaces.c.  */
extern Lisp_Object QCfamily;
/* QCfilter is defined in keyboard.c.  */
extern Lisp_Object QCfilter;

Jim Blandy's avatar
Jim Blandy committed
161
/* a process object is a network connection when its childp field is neither
162
   Qt nor Qnil but is instead a property list (KEY VAL ...).  */
Jim Blandy's avatar
Jim Blandy committed
163 164

#ifdef HAVE_SOCKETS
165
#define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
166
#define NETCONN1_P(p) (GC_CONSP ((p)->childp))
Jim Blandy's avatar
Jim Blandy committed
167 168
#else
#define NETCONN_P(p) 0
169
#define NETCONN1_P(p) 0
Jim Blandy's avatar
Jim Blandy committed
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
#endif /* HAVE_SOCKETS */

/* Define first descriptor number available for subprocesses.  */
#ifdef VMS
#define FIRST_PROC_DESC 1
#else /* Not VMS */
#define FIRST_PROC_DESC 3
#endif

/* Define SIGCHLD as an alias for SIGCLD.  There are many conditionals
   testing SIGCHLD.  */

#if !defined (SIGCHLD) && defined (SIGCLD)
#define SIGCHLD SIGCLD
#endif /* SIGCLD */

#include "syssignal.h"

Richard M. Stallman's avatar
Richard M. Stallman committed
188
#include "syswait.h"
Jim Blandy's avatar
Jim Blandy committed
189

190
extern void set_waiting_for_input P_ ((EMACS_TIME *));
191
extern char *get_operating_system_release ();
192

193
#ifndef USE_CRT_DLL
Roland McGrath's avatar
Roland McGrath committed
194
extern int errno;
195
#endif
Roland McGrath's avatar
Roland McGrath committed
196
#ifdef VMS
Jim Blandy's avatar
Jim Blandy committed
197
extern char *sys_errlist[];
Roland McGrath's avatar
Roland McGrath committed
198
#endif
Jim Blandy's avatar
Jim Blandy committed
199

200 201 202 203
#ifndef HAVE_H_ERRNO
extern int h_errno;
#endif

Jim Blandy's avatar
Jim Blandy committed
204 205
/* t means use pty, nil means use a pipe,
   maybe other values to come.  */
206
static Lisp_Object Vprocess_connection_type;
Jim Blandy's avatar
Jim Blandy committed
207 208 209 210 211 212 213

#ifdef SKTPAIR
#ifndef HAVE_SOCKETS
#include <sys/socket.h>
#endif
#endif /* SKTPAIR */

214 215
/* These next two vars are non-static since sysdep.c uses them in the
   emulation of `select'.  */
Jim Blandy's avatar
Jim Blandy committed
216
/* Number of events of change of status of a process.  */
217
int process_tick;
Jim Blandy's avatar
Jim Blandy committed
218
/* Number of events for which the user or sentinel has been notified.  */
219
int update_tick;
Jim Blandy's avatar
Jim Blandy committed
220

221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
/* Define NON_BLOCKING_CONNECT if we can support non-blocking connects.  */

#ifdef BROKEN_NON_BLOCKING_CONNECT
#undef NON_BLOCKING_CONNECT
#else
#ifndef NON_BLOCKING_CONNECT
#ifdef HAVE_SOCKETS
#ifdef HAVE_SELECT
#if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
#if defined (O_NONBLOCK) || defined (O_NDELAY)
#if defined (EWOULDBLOCK) || defined (EINPROGRESS)
#define NON_BLOCKING_CONNECT
#endif /* EWOULDBLOCK || EINPROGRESS */
#endif /* O_NONBLOCK || O_NDELAY */
#endif /* HAVE_GETPEERNAME || GNU_LINUX */
#endif /* HAVE_SELECT */
#endif /* HAVE_SOCKETS */
#endif /* NON_BLOCKING_CONNECT */
#endif /* BROKEN_NON_BLOCKING_CONNECT */

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259
/* Define DATAGRAM_SOCKETS if datagrams can be used safely on
   this system.  We need to read full packets, so we need a
   "non-destructive" select.  So we require either native select,
   or emulation of select using FIONREAD.  */

#ifdef BROKEN_DATAGRAM_SOCKETS
#undef DATAGRAM_SOCKETS
#else
#ifndef DATAGRAM_SOCKETS
#ifdef HAVE_SOCKETS
#if defined (HAVE_SELECT) || defined (FIONREAD)
#if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
#define DATAGRAM_SOCKETS
#endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
#endif /* HAVE_SELECT || FIONREAD */
#endif /* HAVE_SOCKETS */
#endif /* DATAGRAM_SOCKETS */
#endif /* BROKEN_DATAGRAM_SOCKETS */

260 261
#ifdef TERM
#undef NON_BLOCKING_CONNECT
262
#undef DATAGRAM_SOCKETS
263 264
#endif

265 266 267 268 269 270 271 272 273 274 275
#if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
#ifdef EMACS_HAS_USECS
#define ADAPTIVE_READ_BUFFERING
#endif
#endif

#ifdef ADAPTIVE_READ_BUFFERING
#define READ_OUTPUT_DELAY_INCREMENT 10000
#define READ_OUTPUT_DELAY_MAX       (READ_OUTPUT_DELAY_INCREMENT * 5)
#define READ_OUTPUT_DELAY_MAX_MAX   (READ_OUTPUT_DELAY_INCREMENT * 7)

276 277
/* Number of processes which have a non-zero read_output_delay,
   and therefore might be delayed for adaptive read buffering.  */
278 279 280

static int process_output_delay_count;

281
/* Non-zero if any process has non-nil read_output_skip.  */
282 283 284 285 286

static int process_output_skip;

/* Non-nil means to delay reading process output to improve buffering.
   A value of t means that delay is reset after each send, any other
287 288
   non-nil value does not reset the delay.  A value of nil disables
   adaptive read buffering completely.  */
289 290 291 292 293
static Lisp_Object Vprocess_adaptive_read_buffering;
#else
#define process_output_delay_count 0
#endif

294

295
#include "sysselect.h"
Jim Blandy's avatar
Jim Blandy committed
296

297 298
extern int keyboard_bit_set P_ ((SELECT_TYPE *));

299
/* If we support a window system, turn on the code to poll periodically
300
   to detect C-g.  It isn't actually used when doing interrupt input.  */
301
#ifdef HAVE_WINDOW_SYSTEM
302 303 304
#define POLL_FOR_INPUT
#endif

305
/* Mask of bits indicating the descriptors that we wait for input on.  */
Jim Blandy's avatar
Jim Blandy committed
306

307 308
static SELECT_TYPE input_wait_mask;

309 310 311 312
/* Mask that excludes keyboard input descriptor (s).  */

static SELECT_TYPE non_keyboard_wait_mask;

313 314 315 316
/* Mask that excludes process input descriptor (s).  */

static SELECT_TYPE non_process_wait_mask;

317
#ifdef NON_BLOCKING_CONNECT
318 319 320 321 322 323 324 325 326
/* Mask of bits indicating the descriptors that we wait for connect to
   complete on.  Once they complete, they are removed from this mask
   and added to the input_wait_mask and non_keyboard_wait_mask.  */

static SELECT_TYPE connect_wait_mask;

/* Number of bits set in connect_wait_mask.  */
static int num_pending_connects;

327 328 329 330 331
#define IF_NON_BLOCKING_CONNECT(s) s
#else
#define IF_NON_BLOCKING_CONNECT(s)
#endif

332 333 334
/* The largest descriptor currently in use for a process object.  */
static int max_process_desc;

335 336
/* The largest descriptor currently in use for keyboard input.  */
static int max_keyboard_desc;
Jim Blandy's avatar
Jim Blandy committed
337

338 339
/* Nonzero means delete a process right away if it exits.  */
static int delete_exited_processes;
Jim Blandy's avatar
Jim Blandy committed
340 341

/* Indexed by descriptor, gives the process (if any) for that descriptor */
342
Lisp_Object chan_process[MAXDESC];
Jim Blandy's avatar
Jim Blandy committed
343 344

/* Alist of elements (NAME . PROCESS) */
345
Lisp_Object Vprocess_alist;
Jim Blandy's avatar
Jim Blandy committed
346 347 348 349 350 351 352

/* Buffered-ahead input char from process, indexed by channel.
   -1 means empty (no char is buffered).
   Used on sys V where the only way to tell if there is any
   output from the process is to read at least one char.
   Always -1 on systems that support FIONREAD.  */

353 354
/* Don't make static; need to access externally.  */
int proc_buffered_char[MAXDESC];
355

Karl Heuer's avatar
Karl Heuer committed
356
/* Table of `struct coding-system' for each process.  */
357 358
static struct coding_system *proc_decode_coding_system[MAXDESC];
static struct coding_system *proc_encode_coding_system[MAXDESC];
Karl Heuer's avatar
Karl Heuer committed
359

360 361 362 363 364 365 366
#ifdef DATAGRAM_SOCKETS
/* Table of `partner address' for datagram sockets.  */
struct sockaddr_and_len {
  struct sockaddr *sa;
  int len;
} datagram_address[MAXDESC];
#define DATAGRAM_CHAN_P(chan)	(datagram_address[chan].sa != 0)
367
#define DATAGRAM_CONN_P(proc)	(PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
368 369 370 371 372
#else
#define DATAGRAM_CHAN_P(chan)	(0)
#define DATAGRAM_CONN_P(proc)	(0)
#endif

373
static Lisp_Object get_process ();
374
static void exec_sentinel ();
Richard M. Stallman's avatar
Richard M. Stallman committed
375

376
extern EMACS_TIME timer_check ();
377
extern int timers_run;
378

Richard M. Stallman's avatar
Richard M. Stallman committed
379 380
/* Maximum number of bytes to send to a pty without an eof.  */
static int pty_max_bytes;
381

382
#ifdef HAVE_PTYS
Dave Love's avatar
Dave Love committed
383 384 385
#ifdef HAVE_PTY_H
#include <pty.h>
#endif
386
/* The file name of the pty opened by allocate_pty.  */
387 388

static char pty_name[24];
389
#endif
Jim Blandy's avatar
Jim Blandy committed
390 391 392 393

/* Compute the Lisp form of the process status, p->status, from
   the numeric status that was returned by `wait'.  */

394 395
Lisp_Object status_convert ();

Andreas Schwab's avatar
Andreas Schwab committed
396
void
Jim Blandy's avatar
Jim Blandy committed
397 398 399 400 401 402 403 404 405 406
update_status (p)
     struct Lisp_Process *p;
{
  union { int i; WAITTYPE wt; } u;
  u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16);
  p->status = status_convert (u.wt);
  p->raw_status_low = Qnil;
  p->raw_status_high = Qnil;
}

407
/*  Convert a process status word in Unix format to
Jim Blandy's avatar
Jim Blandy committed
408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437
    the list that we use internally.  */

Lisp_Object
status_convert (w)
     WAITTYPE w;
{
  if (WIFSTOPPED (w))
    return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil));
  else if (WIFEXITED (w))
    return Fcons (Qexit, Fcons (make_number (WRETCODE (w)),
				WCOREDUMP (w) ? Qt : Qnil));
  else if (WIFSIGNALED (w))
    return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)),
				  WCOREDUMP (w) ? Qt : Qnil));
  else
    return Qrun;
}

/* Given a status-list, extract the three pieces of information
   and store them individually through the three pointers.  */

void
decode_status (l, symbol, code, coredump)
     Lisp_Object l;
     Lisp_Object *symbol;
     int *code;
     int *coredump;
{
  Lisp_Object tem;

438
  if (SYMBOLP (l))
Jim Blandy's avatar
Jim Blandy committed
439 440 441 442 443 444 445
    {
      *symbol = l;
      *code = 0;
      *coredump = 0;
    }
  else
    {
446 447 448 449
      *symbol = XCAR (l);
      tem = XCDR (l);
      *code = XFASTINT (XCAR (tem));
      tem = XCDR (tem);
Jim Blandy's avatar
Jim Blandy committed
450 451 452 453 454 455
      *coredump = !NILP (tem);
    }
}

/* Return a string describing a process status list.  */

456 457 458
static Lisp_Object
status_message (p)
     struct Lisp_Process *p;
Jim Blandy's avatar
Jim Blandy committed
459
{
460
  Lisp_Object status = p->status;
Jim Blandy's avatar
Jim Blandy committed
461 462 463 464 465 466 467 468
  Lisp_Object symbol;
  int code, coredump;
  Lisp_Object string, string2;

  decode_status (status, &symbol, &code, &coredump);

  if (EQ (symbol, Qsignal) || EQ (symbol, Qstop))
    {
469
      char *signame;
470
      synchronize_system_messages_locale ();
471
      signame = strsignal (code);
472 473 474
      if (signame == 0)
	signame = "unknown";
      string = build_string (signame);
Jim Blandy's avatar
Jim Blandy committed
475
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
476
      SSET (string, 0, DOWNCASE (SREF (string, 0)));
Jim Blandy's avatar
Jim Blandy committed
477 478 479 480
      return concat2 (string, string2);
    }
  else if (EQ (symbol, Qexit))
    {
481 482
      if (NETCONN1_P (p))
	return build_string (code == 0 ? "deleted\n" : "connection broken by remote peer\n");
Jim Blandy's avatar
Jim Blandy committed
483 484
      if (code == 0)
	return build_string ("finished\n");
485
      string = Fnumber_to_string (make_number (code));
Jim Blandy's avatar
Jim Blandy committed
486
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
487 488
      return concat3 (build_string ("exited abnormally with code "),
		      string, string2);
Jim Blandy's avatar
Jim Blandy committed
489
    }
490 491 492 493
  else if (EQ (symbol, Qfailed))
    {
      string = Fnumber_to_string (make_number (code));
      string2 = build_string ("\n");
494 495
      return concat3 (build_string ("failed with code "),
		      string, string2);
496
    }
Jim Blandy's avatar
Jim Blandy committed
497 498 499 500 501 502
  else
    return Fcopy_sequence (Fsymbol_name (symbol));
}

#ifdef HAVE_PTYS

503 504 505 506 507
/* Open an available pty, returning a file descriptor.
   Return -1 on failure.
   The file name of the terminal corresponding to the pty
   is left in the variable pty_name.  */

Jim Blandy's avatar
Jim Blandy committed
508 509 510
int
allocate_pty ()
{
Andreas Schwab's avatar
Andreas Schwab committed
511
  register int c, i;
Jim Blandy's avatar
Jim Blandy committed
512 513 514 515 516 517 518 519 520
  int fd;

#ifdef PTY_ITERATION
  PTY_ITERATION
#else
  for (c = FIRST_PTY_LETTER; c <= 'z'; c++)
    for (i = 0; i < 16; i++)
#endif
      {
521
	struct stat stb;	/* Used in some PTY_OPEN.  */
Jim Blandy's avatar
Jim Blandy committed
522 523 524 525 526 527
#ifdef PTY_NAME_SPRINTF
	PTY_NAME_SPRINTF
#else
	sprintf (pty_name, "/dev/pty%c%x", c, i);
#endif /* no PTY_NAME_SPRINTF */

528 529 530
#ifdef PTY_OPEN
	PTY_OPEN;
#else /* no PTY_OPEN */
531 532 533 534 535 536 537 538 539 540 541 542 543 544 545
	{
# ifdef IRIS
	  /* Unusual IRIS code */
	  *ptyv = emacs_open ("/dev/ptc", O_RDWR | O_NDELAY, 0);
	  if (fd < 0)
	    return -1;
	  if (fstat (fd, &stb) < 0)
	    return -1;
# else /* not IRIS */
	  { /* Some systems name their pseudoterminals so that there are gaps in
	       the usual sequence - for example, on HP9000/S700 systems, there
	       are no pseudoterminals with names ending in 'f'.  So we wait for
	       three failures in a row before deciding that we've reached the
	       end of the ptys.  */
	    int failed_count = 0;
546

547 548 549 550 551 552 553 554
	    if (stat (pty_name, &stb) < 0)
	      {
		failed_count++;
		if (failed_count >= 3)
		  return -1;
	      }
	    else
	      failed_count = 0;
Jim Blandy's avatar
Jim Blandy committed
555
	  }
556 557 558 559 560 561 562
#  ifdef O_NONBLOCK
	  fd = emacs_open (pty_name, O_RDWR | O_NONBLOCK, 0);
#  else
	  fd = emacs_open (pty_name, O_RDWR | O_NDELAY, 0);
#  endif
# endif /* not IRIS */
	}
563
#endif /* no PTY_OPEN */
Jim Blandy's avatar
Jim Blandy committed
564 565 566 567 568 569 570 571 572 573 574 575 576

	if (fd >= 0)
	  {
	    /* check to make certain that both sides are available
	       this avoids a nasty yet stupid bug in rlogins */
#ifdef PTY_TTY_NAME_SPRINTF
	    PTY_TTY_NAME_SPRINTF
#else
            sprintf (pty_name, "/dev/tty%c%x", c, i);
#endif /* no PTY_TTY_NAME_SPRINTF */
#ifndef UNIPLUS
	    if (access (pty_name, 6) != 0)
	      {
577
		emacs_close (fd);
578
# if !defined(IRIS) && !defined(__sgi)
Jim Blandy's avatar
Jim Blandy committed
579
		continue;
580
# else
Jim Blandy's avatar
Jim Blandy committed
581
		return -1;
582
# endif /* IRIS */
Jim Blandy's avatar
Jim Blandy committed
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
	      }
#endif /* not UNIPLUS */
	    setup_pty (fd);
	    return fd;
	  }
      }
  return -1;
}
#endif /* HAVE_PTYS */

Lisp_Object
make_process (name)
     Lisp_Object name;
{
  register Lisp_Object val, tem, name1;
  register struct Lisp_Process *p;
  char suffix[10];
  register int i;

602
  p = allocate_process ();
603

604 605
  XSETINT (p->infd, -1);
  XSETINT (p->outfd, -1);
606 607 608
  XSETFASTINT (p->pid, 0);
  XSETFASTINT (p->tick, 0);
  XSETFASTINT (p->update_tick, 0);
Jim Blandy's avatar
Jim Blandy committed
609 610 611 612 613
  p->raw_status_low = Qnil;
  p->raw_status_high = Qnil;
  p->status = Qrun;
  p->mark = Fmake_marker ();

614 615 616 617 618 619
#ifdef ADAPTIVE_READ_BUFFERING
  p->adaptive_read_buffering = Qnil;
  XSETFASTINT (p->read_output_delay, 0);
  p->read_output_skip = Qnil;
#endif

Jim Blandy's avatar
Jim Blandy committed
620 621 622 623 624 625 626 627 628 629 630 631
  /* If name is already in use, modify it until it is unused.  */

  name1 = name;
  for (i = 1; ; i++)
    {
      tem = Fget_process (name1);
      if (NILP (tem)) break;
      sprintf (suffix, "<%d>", i);
      name1 = concat2 (name, build_string (suffix));
    }
  name = name1;
  p->name = name;
632
  XSETPROCESS (val, p);
Jim Blandy's avatar
Jim Blandy committed
633 634 635 636
  Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist);
  return val;
}

Andreas Schwab's avatar
Andreas Schwab committed
637
void
Jim Blandy's avatar
Jim Blandy committed
638 639 640 641 642 643 644 645 646 647
remove_process (proc)
     register Lisp_Object proc;
{
  register Lisp_Object pair;

  pair = Frassq (proc, Vprocess_alist);
  Vprocess_alist = Fdelq (pair, Vprocess_alist);

  deactivate_process (proc);
}
648 649 650 651 652 653 654 655 656 657 658

/* Setup coding systems of PROCESS.  */

void
setup_process_coding_systems (process)
     Lisp_Object process;
{
  struct Lisp_Process *p = XPROCESS (process);
  int inch = XINT (p->infd);
  int outch = XINT (p->outfd);

659 660 661
  if (inch < 0 || outch < 0)
    return;

662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
  if (!proc_decode_coding_system[inch])
    proc_decode_coding_system[inch]
      = (struct coding_system *) xmalloc (sizeof (struct coding_system));
  setup_coding_system (p->decode_coding_system,
		       proc_decode_coding_system[inch]);
  if (! NILP (p->filter))
    {
      if (NILP (p->filter_multibyte))
	setup_raw_text_coding_system (proc_decode_coding_system[inch]);
    }
  else if (BUFFERP (p->buffer))
    {
      if (NILP (XBUFFER (p->buffer)->enable_multibyte_characters))
	setup_raw_text_coding_system (proc_decode_coding_system[inch]);
    }

  if (!proc_encode_coding_system[outch])
    proc_encode_coding_system[outch]
      = (struct coding_system *) xmalloc (sizeof (struct coding_system));
  setup_coding_system (p->encode_coding_system,
		       proc_encode_coding_system[outch]);
}
Jim Blandy's avatar
Jim Blandy committed
684 685

DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0,
686 687
       doc: /* Return t if OBJECT is a process.  */)
     (object)
688
     Lisp_Object object;
Jim Blandy's avatar
Jim Blandy committed
689
{
690
  return PROCESSP (object) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
691 692 693
}

DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0,
694 695
       doc: /* Return the process named NAME, or nil if there is none.  */)
     (name)
Jim Blandy's avatar
Jim Blandy committed
696 697
     register Lisp_Object name;
{
698
  if (PROCESSP (name))
Jim Blandy's avatar
Jim Blandy committed
699
    return name;
700
  CHECK_STRING (name);
Jim Blandy's avatar
Jim Blandy committed
701 702 703 704
  return Fcdr (Fassoc (name, Vprocess_alist));
}

DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0,
705 706 707
       doc: /* Return the (or a) process associated with BUFFER.
BUFFER may be a buffer or the name of one.  */)
     (buffer)
708
     register Lisp_Object buffer;
Jim Blandy's avatar
Jim Blandy committed
709 710 711
{
  register Lisp_Object buf, tail, proc;

712 713
  if (NILP (buffer)) return Qnil;
  buf = Fget_buffer (buffer);
Jim Blandy's avatar
Jim Blandy committed
714 715 716 717 718
  if (NILP (buf)) return Qnil;

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      proc = Fcdr (Fcar (tail));
719
      if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf))
Jim Blandy's avatar
Jim Blandy committed
720 721 722 723 724
	return proc;
    }
  return Qnil;
}

Jim Blandy's avatar
Jim Blandy committed
725 726 727 728
/* 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.  */
Jim Blandy's avatar
Jim Blandy committed
729

730
static Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
731 732 733
get_process (name)
     register Lisp_Object name;
{
734 735 736 737 738 739 740
  register Lisp_Object proc, obj;
  if (STRINGP (name))
    {
      obj = Fget_process (name);
      if (NILP (obj))
	obj = Fget_buffer (name);
      if (NILP (obj))
741
	error ("Process %s does not exist", SDATA (name));
742 743 744
    }
  else if (NILP (name))
    obj = Fcurrent_buffer ();
Jim Blandy's avatar
Jim Blandy committed
745
  else
746 747 748 749 750
    obj = name;

  /* Now obj should be either a buffer object or a process object.
   */
  if (BUFFERP (obj))
Jim Blandy's avatar
Jim Blandy committed
751
    {
752
      proc = Fget_buffer_process (obj);
Jim Blandy's avatar
Jim Blandy committed
753
      if (NILP (proc))
754
	error ("Buffer %s has no process", SDATA (XBUFFER (obj)->name));
Jim Blandy's avatar
Jim Blandy committed
755 756
    }
  else
757
    {
758
      CHECK_PROCESS (obj);
759 760 761
      proc = obj;
    }
  return proc;
Jim Blandy's avatar
Jim Blandy committed
762 763 764
}

DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0,
765 766 767 768
       doc: /* Delete PROCESS: kill it and forget about it immediately.
PROCESS may be a process, a buffer, the name of a process or buffer, or
nil, indicating the current buffer's process.  */)
     (process)
769
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
770
{
771 772 773 774
  process = get_process (process);
  XPROCESS (process)->raw_status_low = Qnil;
  XPROCESS (process)->raw_status_high = Qnil;
  if (NETCONN_P (process))
Jim Blandy's avatar
Jim Blandy committed
775
    {
776 777
      XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil));
      XSETINT (XPROCESS (process)->tick, ++process_tick);
778
      status_notify ();
Jim Blandy's avatar
Jim Blandy committed
779
    }
780
  else if (XINT (XPROCESS (process)->infd) >= 0)
Jim Blandy's avatar
Jim Blandy committed
781
    {
782
      Fkill_process (process, Qnil);
Jim Blandy's avatar
Jim Blandy committed
783
      /* Do this now, since remove_process will make sigchld_handler do nothing.  */
784
      XPROCESS (process)->status
Jim Blandy's avatar
Jim Blandy committed
785
	= Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil));
786
      XSETINT (XPROCESS (process)->tick, ++process_tick);
Jim Blandy's avatar
Jim Blandy committed
787 788
      status_notify ();
    }
789
  remove_process (process);
Jim Blandy's avatar
Jim Blandy committed
790 791 792 793
  return Qnil;
}

DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0,
794 795 796 797 798 799 800
       doc: /* Return the status of PROCESS.
The returned value is one of the following symbols:
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.
801
listen -- for a network stream server that is listening.
802
closed -- for a network stream connection that is closed.
803 804
connect -- when waiting for a non-blocking connection to complete.
failed -- when a non-blocking connection has failed.
805 806 807 808
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
nil, indicating the current buffer's process.  */)
     (process)
809
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
810 811 812
{
  register struct Lisp_Process *p;
  register Lisp_Object status;
813

814 815
  if (STRINGP (process))
    process = Fget_process (process);
816
  else
817
    process = get_process (process);
818

819 820
  if (NILP (process))
    return process;
821

822
  p = XPROCESS (process);
Jim Blandy's avatar
Jim Blandy committed
823 824 825
  if (!NILP (p->raw_status_low))
    update_status (p);
  status = p->status;
826
  if (CONSP (status))
827
    status = XCAR (status);
828
  if (NETCONN1_P (p))
Jim Blandy's avatar
Jim Blandy committed
829
    {
830
      if (EQ (status, Qexit))
Jim Blandy's avatar
Jim Blandy committed
831
	status = Qclosed;
832 833 834 835
      else if (EQ (p->command, Qt))
	status = Qstop;
      else if (EQ (status, Qrun))
	status = Qopen;
Jim Blandy's avatar
Jim Blandy committed
836 837 838 839 840 841
    }
  return status;
}

DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status,
       1, 1, 0,
842 843 844
       doc: /* Return the exit status of PROCESS or the signal number that killed it.
If PROCESS has not yet exited or died, return 0.  */)
     (process)
845
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
846
{
847
  CHECK_PROCESS (process);
848 849 850
  if (!NILP (XPROCESS (process)->raw_status_low))
    update_status (XPROCESS (process));
  if (CONSP (XPROCESS (process)->status))
851
    return XCAR (XCDR (XPROCESS (process)->status));
Jim Blandy's avatar
Jim Blandy committed
852 853 854 855
  return make_number (0);
}

DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0,
856
       doc: /* Return the process id of PROCESS.
857
This is the pid of the external process which PROCESS uses or talks to.
858 859
For a network connection, this value is nil.  */)
     (process)
860
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
861
{
862
  CHECK_PROCESS (process);
863
  return XPROCESS (process)->pid;
Jim Blandy's avatar
Jim Blandy committed
864 865 866
}

DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0,
867 868 869 870
       doc: /* 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.  */)
     (process)
871
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
872
{
873
  CHECK_PROCESS (process);
874
  return XPROCESS (process)->name;
Jim Blandy's avatar
Jim Blandy committed
875 876 877
}

DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0,
878 879 880 881 882
       doc: /* 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.
For a non-child channel, this is nil.  */)
     (process)
883
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
884
{
885
  CHECK_PROCESS (process);
886
  return XPROCESS (process)->command;
Jim Blandy's avatar
Jim Blandy committed
887 888
}

889
DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0,
890 891 892 893
       doc: /* 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.  */)
     (process)
894
     register Lisp_Object process;
895
{
896
  CHECK_PROCESS (process);
897
  return XPROCESS (process)->tty_name;
898 899
}

Jim Blandy's avatar
Jim Blandy committed
900
DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer,
901 902 903
       2, 2, 0,
       doc: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).  */)
     (process, buffer)
904
     register Lisp_Object process, buffer;
Jim Blandy's avatar
Jim Blandy committed
905
{
906 907
  struct Lisp_Process *p;

908
  CHECK_PROCESS (process);
Jim Blandy's avatar
Jim Blandy committed
909
  if (!NILP (buffer))
910
    CHECK_BUFFER (buffer);
911 912 913 914
  p = XPROCESS (process);
  p->buffer = buffer;
  if (NETCONN1_P (p))
    p->childp = Fplist_put (p->childp, QCbuffer, buffer);
915
  setup_process_coding_systems (process);
Jim Blandy's avatar
Jim Blandy committed
916 917 918 919
  return buffer;
}

DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer,
920 921 922 923
       1, 1, 0,
       doc: /* Return the buffer PROCESS is associated with.
Output from PROCESS is inserted in this buffer unless PROCESS has a filter.  */)
     (process)
924
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
925
{
926
  CHECK_PROCESS (process);
927
  return XPROCESS (process)->buffer;
Jim Blandy's avatar
Jim Blandy committed
928 929 930
}

DEFUN ("process-mark", Fprocess_mark, Sprocess_mark,
931 932 933
       1, 1, 0,
       doc: /* Return the marker for the end of the last output from PROCESS.  */)
     (process)
934
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
935
{
936
  CHECK_PROCESS (process);
937
  return XPROCESS (process)->mark;
Jim Blandy's avatar
Jim Blandy committed
938 939 940
}

DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter,
941 942 943
       2, 2, 0,
       doc: /* Give PROCESS the filter function FILTER; nil means no filter.
t means stop accepting output from the process.
944 945 946

When a process has a filter, its buffer is not used for output.
Instead, each time it does output, the entire string of output is
947
passed to the filter.
948

949
The filter gets two arguments: the process and the string of output.
950 951 952 953 954 955
The string argument is normally a multibyte string, except:
- if the process' input coding system is no-conversion or raw-text,
  it is a unibyte string (the non-converted input), or else
- if `default-enable-multibyte-characters' is nil, it is a unibyte
  string (the result of converting the decoded input multibyte
  string to unibyte with `string-make-unibyte').  */)
956
     (process, filter)
957
     register Lisp_Object process, filter;
Jim Blandy's avatar
Jim Blandy committed
958
{
959
  struct Lisp_Process *p;
960

961
  CHECK_PROCESS (process);
962 963 964 965 966 967 968 969 970
  p = XPROCESS (process);

  /* Don't signal an error if the process' input file descriptor
     is closed.  This could make debugging Lisp more difficult,
     for example when doing something like

     (setq process (start-process ...))
     (debug)
     (set-process-filter process ...)  */
971

972
  if (XINT (p->infd) >= 0)
973
    {
974
      if (EQ (filter, Qt) && !EQ (p->status, Qlisten))
975 976 977 978
	{
	  FD_CLR (XINT (p->infd), &input_wait_mask);
	  FD_CLR (XINT (p->infd), &non_keyboard_wait_mask);
	}
979 980
      else if (EQ (p->filter, Qt)
	       && !EQ (p->command, Qt)) /* Network process not stopped. */
981 982 983 984
	{
	  FD_SET (XINT (p->infd), &input_wait_mask);
	  FD_SET (XINT (p->infd), &non_keyboard_wait_mask);
	}
985
    }
986

987
  p->filter = filter;
988 989
  if (NETCONN1_P (p))
    p->childp = Fplist_put (p->childp, QCfilter, filter);
990
  setup_process_coding_systems (process);
Jim Blandy's avatar
Jim Blandy committed
991 992 993 994
  return filter;
}

DEFUN ("process-filter", Fprocess_filter, Sprocess_filter,
995 996 997 998
       1, 1, 0,
       doc: /* Returns the filter function of PROCESS; nil if none.
See `set-process-filter' for more info on filter functions.  */)
     (process)
999
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
1000
{
1001
  CHECK_PROCESS (process);
1002
  return XPROCESS (process)->filter;
Jim Blandy's avatar
Jim Blandy committed
1003 1004 1005
}

DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel,
1006 1007 1008 1009 1010
       2, 2, 0,
       doc: /* 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.  */)
     (process, sentinel)
1011
     register Lisp_Object process, sentinel;
Jim Blandy's avatar
Jim Blandy committed
1012
{
1013 1014
  struct Lisp_Process *p;

1015
  CHECK_PROCESS (process);
1016 1017 1018 1019 1020
  p = XPROCESS (process);

  p->sentinel = sentinel;
  if (NETCONN1_P (p))
    p->childp = Fplist_put (p->childp, QCsentinel, sentinel);
Jim Blandy's avatar
Jim Blandy committed
1021 1022 1023 1024
  return sentinel;
}

DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel,
1025 1026 1027 1028
       1, 1, 0,
       doc: /* Return the sentinel of PROCESS; nil if none.
See `set-process-sentinel' for more info on sentinels.  */)
     (process)
1029
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
1030
{
1031
  CHECK_PROCESS (process);
1032
  return XPROCESS (process)->sentinel;
Jim Blandy's avatar
Jim Blandy committed
1033 1034
}

1035
DEFUN ("set-process-window-size", Fset_process_window_size,
1036 1037 1038
       Sset_process_window_size, 3, 3, 0,
       doc: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH.  */)
     (process, height, width)
1039
     register Lisp_Object process, height, width;
1040
{
1041 1042 1043
  CHECK_PROCESS (process);
  CHECK_NATNUM (height);
  CHECK_NATNUM (width);
1044

1045
  if (XINT (XPROCESS (process)->infd) < 0
1046 1047
      || set_window_size (XINT (XPROCESS (process)->infd),
			  XINT (height), XINT (width)) <= 0)
1048 1049 1050 1051 1052
    return Qnil;
  else
    return Qt;
}

1053
DEFUN ("set-process-inherit-coding-system-flag",
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070
       Fset_process_inherit_coding_system_flag,
       Sset_process_inherit_coding_system_flag, 2, 2, 0,
       doc: /* Determine whether buffer of PROCESS will inherit coding-system.
If the second argument FLAG is non-nil, then the variable
`buffer-file-coding-system' of the buffer associated with PROCESS
will be bound to the value of the coding system used to decode
the process output.

This is useful when the coding system specified for the process buffer
leaves either the character code conversion or the end-of-line conversion
unspecified, or if the coding system used to decode the process output
is more appropriate for saving the process buffer.

Binding the variable `inherit-process-coding-system' to non-nil before
starting the process is an alternative way of setting the inherit flag
for the process which will run.  */)
     (process, flag)
1071 1072
     register Lisp_Object process, flag;
{
1073
  CHECK_PROCESS (process);
1074
  XPROCESS (process)->inherit_coding_system_flag = flag;
1075 1076 1077 1078
  return flag;
}

DEFUN ("process-inherit-coding-system-flag",
1079 1080 1081 1082 1083 1084 1085
       Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag,
       1, 1, 0,
       doc: /* Return the value of inherit-coding-system flag for PROCESS.
If this flag is t, `buffer-file-coding-system' of the buffer
associated with PROCESS will inherit the coding system used to decode
the process output.  */)
     (process)
1086 1087
     register Lisp_Object process;
{
1088
  CHECK_PROCESS (process);
1089
  return XPROCESS (process)->inherit_coding_system_flag;
1090 1091
}

1092 1093 1094 1095
DEFUN ("set-process-query-on-exit-flag",
       Fset_process_query_on_exit_flag, Sset_process_query_on_exit_flag,
       2, 2, 0,
       doc: /* Specify if query is needed for PROCESS when Emacs is exited.
1096
If the second argument FLAG is non-nil, Emacs will query the user before
1097 1098 1099
exiting if PROCESS is running.  */)
     (process, flag)
     register Lisp_Object process, flag;
Jim Blandy's avatar
Jim Blandy committed
1100
{
1101
  CHECK_PROCESS (process);
1102 1103
  XPROCESS (process)->kill_without_query = Fnull (flag);
  return flag;
Jim Blandy's avatar
Jim Blandy committed
1104
}
1105

1106 1107
DEFUN ("process-query-on-exit-flag",
       Fprocess_query_on_exit_flag, Sprocess_query_on_exit_flag,
1108
       1, 1, 0,
1109
       doc: /* Return the current value of query-on-exit flag for PROCESS.  */)
1110
     (process)
1111 1112
     register Lisp_Object process;
{
1113
  CHECK_PROCESS (process);
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
  return Fnull (XPROCESS (process)->kill_without_query);
}

#ifdef DATAGRAM_SOCKETS
Lisp_Object Fprocess_datagram_address ();
#endif

DEFUN ("process-contact", Fprocess_contact, Sprocess_contact,
       1, 2, 0,
       doc: /* Return the contact info of PROCESS; t for a real child.
For a net connection, the value depends on the optional KEY arg.
If KEY is nil, value is a cons cell of the form (HOST SERVICE),
if KEY is t, the complete contact information for the connection is
returned, else the specific value for the keyword KEY is returned.
See `make-network-process' for a list of keywords.  */)
     (process, key)
     register Lisp_Object process, key;
{
  Lisp_Object contact;

  CHECK_PROCESS (process);
  contact = XPROCESS (process)->childp;

#ifdef DATAGRAM_SOCKETS
  if (DATAGRAM_CONN_P (process)
      && (EQ (key, Qt) || EQ (key, QCremote)))
1140
    contact = Fplist_put (contact, QCremote,
1141 1142 1143 1144 1145 1146 1147 1148 1149
			  Fprocess_datagram_address (process));
#endif

  if (!NETCONN_P (process) || EQ (key, Qt))
    return contact;
  if (NILP (key))
    return Fcons (Fplist_get (contact, QChost),
		  Fcons (Fplist_get (contact, QCservice), Qnil));
  return Fplist_get (contact, key);
1150 1151
}

1152 1153 1154 1155 1156
DEFUN ("process-plist", Fprocess_plist, Sprocess_plist,
       1, 1, 0,
       doc: /* Return the plist of PROCESS.  */)
     (process)
     register Lisp_Object process;
1157
{
Kim F. Storm's avatar
Kim F. Storm committed
1158
  CHECK_PROCESS (process);
1159
  return XPROCESS (process)->plist;
Kim F. Storm's avatar
Kim F. Storm committed
1160
}
1161

1162 1163
DEFUN ("set-process-plist", Fset_process_plist, Sset_process_plist,
       2, 2, 0,
1164
       doc: /* Replace the plist of PROCESS with PLIST.  Returns PLIST.  */)