process.c 141 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Asynchronous subprocess control for GNU Emacs.
Richard M. Stallman's avatar
Richard M. Stallman committed
2
   Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998
3
      Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
4 5 6 7 8

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
9
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
10 11 12 13 14 15 16 17 18
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
19 20
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Jim Blandy's avatar
Jim Blandy committed
21 22 23 24


#include <signal.h>

25
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
26

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 48 49 50 51
#ifdef WINDOWSNT
#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 */
Jim Blandy's avatar
Jim Blandy committed
60 61
#endif /* HAVE_SOCKETS */

62 63 64 65 66
/* TERM is a poor-man's SLIP, used on Linux.  */
#ifdef TERM
#include <client.h>
#endif

67 68
/* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
#ifdef HAVE_BROKEN_INET_ADDR
69 70 71 72 73 74 75
#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

76
#if defined(BSD_SYSTEM) || defined(STRIDE)
Jim Blandy's avatar
Jim Blandy committed
77
#include <sys/ioctl.h>
78
#if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
Jim Blandy's avatar
Jim Blandy committed
79 80
#include <fcntl.h>
#endif /* HAVE_PTYS and no O_NDELAY */
81
#endif /* BSD_SYSTEM || STRIDE */
Jim Blandy's avatar
Jim Blandy committed
82

83 84 85 86
#ifdef BROKEN_O_NONBLOCK
#undef O_NONBLOCK
#endif /* BROKEN_O_NONBLOCK */

Jim Blandy's avatar
Jim Blandy committed
87 88 89 90 91 92 93 94 95
#ifdef NEED_BSDTTY
#include <bsdtty.h>
#endif

#ifdef IRIS
#include <sys/sysmacros.h>	/* for "minor" */
#endif /* not IRIS */

#include "systime.h"
96
#include "systty.h"
Jim Blandy's avatar
Jim Blandy committed
97 98 99 100

#include "lisp.h"
#include "window.h"
#include "buffer.h"
Karl Heuer's avatar
Karl Heuer committed
101 102
#include "charset.h"
#include "coding.h"
Jim Blandy's avatar
Jim Blandy committed
103 104 105 106
#include "process.h"
#include "termhooks.h"
#include "termopts.h"
#include "commands.h"
107
#include "frame.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
108
#include "blockinput.h"
Andreas Schwab's avatar
Andreas Schwab committed
109 110
#include "keyboard.h"
#include "dispextern.h"
Jim Blandy's avatar
Jim Blandy committed
111

112 113
#define max(a, b) ((a) > (b) ? (a) : (b))

114
Lisp_Object Qprocessp;
Jim Blandy's avatar
Jim Blandy committed
115
Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed;
116
Lisp_Object Qlast_nonmenu_event;
Jim Blandy's avatar
Jim Blandy committed
117 118 119
/* Qexit is declared and initialized in eval.c.  */

/* a process object is a network connection when its childp field is neither
120
   Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM).  */
Jim Blandy's avatar
Jim Blandy committed
121 122

#ifdef HAVE_SOCKETS
123
#define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
Jim Blandy's avatar
Jim Blandy committed
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
#else
#define NETCONN_P(p) 0
#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
144
#include "syswait.h"
Jim Blandy's avatar
Jim Blandy committed
145

146 147
extern void set_waiting_for_input P_ ((EMACS_TIME *));

Roland McGrath's avatar
Roland McGrath committed
148 149 150
extern int errno;
extern char *strerror ();
#ifdef VMS
Jim Blandy's avatar
Jim Blandy committed
151
extern char *sys_errlist[];
Roland McGrath's avatar
Roland McGrath committed
152
#endif
Jim Blandy's avatar
Jim Blandy committed
153

154 155 156 157
#ifndef HAVE_H_ERRNO
extern int h_errno;
#endif

158
#ifndef SYS_SIGLIST_DECLARED
Jim Blandy's avatar
Jim Blandy committed
159 160
#ifndef VMS
#ifndef BSD4_1
161
#ifndef WINDOWSNT
162
#ifndef LINUX
Jim Blandy's avatar
Jim Blandy committed
163
extern char *sys_siglist[];
Richard M. Stallman's avatar
Richard M. Stallman committed
164 165
#endif /* not LINUX */
#else /* BSD4_1 */
Jim Blandy's avatar
Jim Blandy committed
166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194
char *sys_siglist[] =
  {
    "bum signal!!",
    "hangup",
    "interrupt",
    "quit",
    "illegal instruction",
    "trace trap",
    "iot instruction",
    "emt instruction",
    "floating point exception",
    "kill",
    "bus error",
    "segmentation violation",
    "bad argument to system call",
    "write on a pipe with no one to read it",
    "alarm clock",
    "software termination signal from kill",
    "status signal",
    "sendable stop signal not from tty",
    "stop signal from tty",
    "continue a stopped process",
    "child status has changed",
    "background read attempted from control tty",
    "background write attempted from control tty",
    "input record available at control tty",
    "exceeded CPU time limit",
    "exceeded file size limit"
    };
195
#endif /* not WINDOWSNT */
Jim Blandy's avatar
Jim Blandy committed
196 197
#endif
#endif /* VMS */
198
#endif /* ! SYS_SIGLIST_DECLARED */
Jim Blandy's avatar
Jim Blandy committed
199 200 201

/* t means use pty, nil means use a pipe,
   maybe other values to come.  */
202
static Lisp_Object Vprocess_connection_type;
Jim Blandy's avatar
Jim Blandy committed
203 204 205 206 207 208 209

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

210 211
/* These next two vars are non-static since sysdep.c uses them in the
   emulation of `select'.  */
Jim Blandy's avatar
Jim Blandy committed
212
/* Number of events of change of status of a process.  */
213
int process_tick;
Jim Blandy's avatar
Jim Blandy committed
214
/* Number of events for which the user or sentinel has been notified.  */
215
int update_tick;
Jim Blandy's avatar
Jim Blandy committed
216

217
#include "sysselect.h"
Jim Blandy's avatar
Jim Blandy committed
218

219 220
extern int keyboard_bit_set P_ ((SELECT_TYPE *));

221
/* If we support a window system, turn on the code to poll periodically
222
   to detect C-g.  It isn't actually used when doing interrupt input.  */
223
#ifdef HAVE_WINDOW_SYSTEM
224 225 226
#define POLL_FOR_INPUT
#endif

227
/* Mask of bits indicating the descriptors that we wait for input on.  */
Jim Blandy's avatar
Jim Blandy committed
228

229 230
static SELECT_TYPE input_wait_mask;

231 232 233 234
/* Mask that excludes keyboard input descriptor (s).  */

static SELECT_TYPE non_keyboard_wait_mask;

235 236 237 238
/* Mask that excludes process input descriptor (s).  */

static SELECT_TYPE non_process_wait_mask;

239 240 241
/* The largest descriptor currently in use for a process object.  */
static int max_process_desc;

242 243
/* The largest descriptor currently in use for keyboard input.  */
static int max_keyboard_desc;
Jim Blandy's avatar
Jim Blandy committed
244

245 246
/* Nonzero means delete a process right away if it exits.  */
static int delete_exited_processes;
Jim Blandy's avatar
Jim Blandy committed
247 248

/* Indexed by descriptor, gives the process (if any) for that descriptor */
249
Lisp_Object chan_process[MAXDESC];
Jim Blandy's avatar
Jim Blandy committed
250 251

/* Alist of elements (NAME . PROCESS) */
252
Lisp_Object Vprocess_alist;
Jim Blandy's avatar
Jim Blandy committed
253 254 255 256 257 258 259

/* 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.  */

260 261
/* Don't make static; need to access externally.  */
int proc_buffered_char[MAXDESC];
262

Karl Heuer's avatar
Karl Heuer committed
263
/* Table of `struct coding-system' for each process.  */
264 265
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
266

267
static Lisp_Object get_process ();
Richard M. Stallman's avatar
Richard M. Stallman committed
268

269
extern EMACS_TIME timer_check ();
270
extern int timers_run;
271

Richard M. Stallman's avatar
Richard M. Stallman committed
272 273
/* Maximum number of bytes to send to a pty without an eof.  */
static int pty_max_bytes;
274

275
extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system;
276

277 278
#ifdef HAVE_PTYS
/* The file name of the pty opened by allocate_pty.  */
279 280

static char pty_name[24];
281
#endif
Jim Blandy's avatar
Jim Blandy committed
282 283 284 285

/* Compute the Lisp form of the process status, p->status, from
   the numeric status that was returned by `wait'.  */

286 287
Lisp_Object status_convert ();

Andreas Schwab's avatar
Andreas Schwab committed
288
void
Jim Blandy's avatar
Jim Blandy committed
289 290 291 292 293 294 295 296 297 298
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;
}

Jim Blandy's avatar
Typo.  
Jim Blandy committed
299
/*  Convert a process status word in Unix format to 
Jim Blandy's avatar
Jim Blandy committed
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329
    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;

330
  if (SYMBOLP (l))
Jim Blandy's avatar
Jim Blandy committed
331 332 333 334 335 336 337
    {
      *symbol = l;
      *code = 0;
      *coredump = 0;
    }
  else
    {
338 339 340 341
      *symbol = XCAR (l);
      tem = XCDR (l);
      *code = XFASTINT (XCAR (tem));
      tem = XCDR (tem);
Jim Blandy's avatar
Jim Blandy committed
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
      *coredump = !NILP (tem);
    }
}

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

Lisp_Object 
status_message (status)
     Lisp_Object status;
{
  Lisp_Object symbol;
  int code, coredump;
  Lisp_Object string, string2;

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

  if (EQ (symbol, Qsignal) || EQ (symbol, Qstop))
    {
360 361 362
      char *signame = 0;
      if (code < NSIG)
	{
363
#ifndef VMS
364 365
	  /* Cast to suppress warning if the table has const char *.  */
	  signame = (char *) sys_siglist[code];
366
#else
367
	  signame = sys_errlist[code];
368
#endif
369 370 371 372
	}
      if (signame == 0)
	signame = "unknown";
      string = build_string (signame);
Jim Blandy's avatar
Jim Blandy committed
373 374 375 376 377 378 379 380
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
      XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]);
      return concat2 (string, string2);
    }
  else if (EQ (symbol, Qexit))
    {
      if (code == 0)
	return build_string ("finished\n");
381
      string = Fnumber_to_string (make_number (code));
Jim Blandy's avatar
Jim Blandy committed
382 383 384 385 386 387 388 389 390 391
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
      return concat2 (build_string ("exited abnormally with code "),
		      concat2 (string, string2));
    }
  else
    return Fcopy_sequence (Fsymbol_name (symbol));
}

#ifdef HAVE_PTYS

392 393 394 395 396
/* 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
397 398 399 400
int
allocate_pty ()
{
  struct stat stb;
Andreas Schwab's avatar
Andreas Schwab committed
401
  register int c, i;
Jim Blandy's avatar
Jim Blandy committed
402 403
  int fd;

Jim Blandy's avatar
Jim Blandy committed
404 405 406 407 408 409 410
  /* 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;

Jim Blandy's avatar
Jim Blandy committed
411 412 413 414 415 416 417 418 419 420 421 422 423
#ifdef PTY_ITERATION
  PTY_ITERATION
#else
  for (c = FIRST_PTY_LETTER; c <= 'z'; c++)
    for (i = 0; i < 16; i++)
#endif
      {
#ifdef PTY_NAME_SPRINTF
	PTY_NAME_SPRINTF
#else
	sprintf (pty_name, "/dev/pty%c%x", c, i);
#endif /* no PTY_NAME_SPRINTF */

424 425 426
#ifdef PTY_OPEN
	PTY_OPEN;
#else /* no PTY_OPEN */
Jim Blandy's avatar
Jim Blandy committed
427 428 429 430 431 432
#ifdef IRIS
	/* Unusual IRIS code */
 	*ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0);
 	if (fd < 0)
 	  return -1;
	if (fstat (fd, &stb) < 0)
Jim Blandy's avatar
Jim Blandy committed
433
	  return -1;
434
#else /* not IRIS */
Jim Blandy's avatar
Jim Blandy committed
435 436 437 438 439 440 441 442
	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
443 444 445 446 447
#ifdef O_NONBLOCK
	fd = open (pty_name, O_RDWR | O_NONBLOCK, 0);
#else
	fd = open (pty_name, O_RDWR | O_NDELAY, 0);
#endif
448 449
#endif /* not IRIS */
#endif /* no PTY_OPEN */
Jim Blandy's avatar
Jim Blandy committed
450 451 452 453 454 455 456 457 458 459 460 461 462 463

	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)
	      {
		close (fd);
464
#if !defined(IRIS) && !defined(__sgi)
Jim Blandy's avatar
Jim Blandy committed
465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482
		continue;
#else
		return -1;
#endif /* IRIS */
	      }
#endif /* not UNIPLUS */
	    setup_pty (fd);
	    return fd;
	  }
      }
  return -1;
}
#endif /* HAVE_PTYS */

Lisp_Object
make_process (name)
     Lisp_Object name;
{
483
  struct Lisp_Vector *vec;
Jim Blandy's avatar
Jim Blandy committed
484 485 486 487 488
  register Lisp_Object val, tem, name1;
  register struct Lisp_Process *p;
  char suffix[10];
  register int i;

489 490 491 492 493 494
  vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process));
  for (i = 0; i < VECSIZE (struct Lisp_Process); i++)
    vec->contents[i] = Qnil;
  vec->size = VECSIZE (struct Lisp_Process);
  p = (struct Lisp_Process *)vec;

495 496
  XSETINT (p->infd, -1);
  XSETINT (p->outfd, -1);
497 498 499
  XSETFASTINT (p->pid, 0);
  XSETFASTINT (p->tick, 0);
  XSETFASTINT (p->update_tick, 0);
Jim Blandy's avatar
Jim Blandy committed
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516
  p->raw_status_low = Qnil;
  p->raw_status_high = Qnil;
  p->status = Qrun;
  p->mark = Fmake_marker ();

  /* 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;
517
  XSETPROCESS (val, p);
Jim Blandy's avatar
Jim Blandy committed
518 519 520 521
  Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist);
  return val;
}

Andreas Schwab's avatar
Andreas Schwab committed
522
void
Jim Blandy's avatar
Jim Blandy committed
523 524 525 526 527 528 529 530 531 532 533 534 535
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);
}

DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0,
  "Return t if OBJECT is a process.")
536 537
  (object)
     Lisp_Object object;
Jim Blandy's avatar
Jim Blandy committed
538
{
539
  return PROCESSP (object) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
540 541 542 543 544 545 546
}

DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0,
  "Return the process named NAME, or nil if there is none.")
  (name)
     register Lisp_Object name;
{
547
  if (PROCESSP (name))
Jim Blandy's avatar
Jim Blandy committed
548 549 550 551 552 553
    return name;
  CHECK_STRING (name, 0);
  return Fcdr (Fassoc (name, Vprocess_alist));
}

DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0,
Karl Heuer's avatar
Karl Heuer committed
554
  "Return the (or a) process associated with BUFFER.\n\
Jim Blandy's avatar
Jim Blandy committed
555
BUFFER may be a buffer or the name of one.")
556 557
  (buffer)
     register Lisp_Object buffer;
Jim Blandy's avatar
Jim Blandy committed
558 559 560
{
  register Lisp_Object buf, tail, proc;

561 562
  if (NILP (buffer)) return Qnil;
  buf = Fget_buffer (buffer);
Jim Blandy's avatar
Jim Blandy committed
563 564 565 566 567
  if (NILP (buf)) return Qnil;

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      proc = Fcdr (Fcar (tail));
568
      if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf))
Jim Blandy's avatar
Jim Blandy committed
569 570 571 572 573
	return proc;
    }
  return Qnil;
}

Jim Blandy's avatar
Jim Blandy committed
574 575 576 577
/* 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
578

579
static Lisp_Object
Jim Blandy's avatar
Jim Blandy committed
580 581 582
get_process (name)
     register Lisp_Object name;
{
583 584 585 586 587 588 589 590 591 592 593
  register Lisp_Object proc, obj;
  if (STRINGP (name))
    {
      obj = Fget_process (name);
      if (NILP (obj))
	obj = Fget_buffer (name);
      if (NILP (obj))
	error ("Process %s does not exist", XSTRING (name)->data);
    }
  else if (NILP (name))
    obj = Fcurrent_buffer ();
Jim Blandy's avatar
Jim Blandy committed
594
  else
595 596 597 598 599
    obj = name;

  /* Now obj should be either a buffer object or a process object.
   */
  if (BUFFERP (obj))
Jim Blandy's avatar
Jim Blandy committed
600
    {
601
      proc = Fget_buffer_process (obj);
Jim Blandy's avatar
Jim Blandy committed
602
      if (NILP (proc))
603
	error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data);
Jim Blandy's avatar
Jim Blandy committed
604 605
    }
  else
606 607 608 609 610
    {
      CHECK_PROCESS (obj, 0);
      proc = obj;
    }
  return proc;
Jim Blandy's avatar
Jim Blandy committed
611 612 613 614
}

DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0,
  "Delete PROCESS: kill it and forget about it immediately.\n\
Jim Blandy's avatar
Jim Blandy committed
615 616
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.")
617 618
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
619
{
620 621 622 623
  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
624
    {
625 626
      XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil));
      XSETINT (XPROCESS (process)->tick, ++process_tick);
Jim Blandy's avatar
Jim Blandy committed
627
    }
628
  else if (XINT (XPROCESS (process)->infd) >= 0)
Jim Blandy's avatar
Jim Blandy committed
629
    {
630
      Fkill_process (process, Qnil);
Jim Blandy's avatar
Jim Blandy committed
631
      /* Do this now, since remove_process will make sigchld_handler do nothing.  */
632
      XPROCESS (process)->status 
Jim Blandy's avatar
Jim Blandy committed
633
	= Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil));
634
      XSETINT (XPROCESS (process)->tick, ++process_tick);
Jim Blandy's avatar
Jim Blandy committed
635 636
      status_notify ();
    }
637
  remove_process (process);
Jim Blandy's avatar
Jim Blandy committed
638 639 640 641
  return Qnil;
}

DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0,
Karl Heuer's avatar
Karl Heuer committed
642 643
  "Return the status of PROCESS.\n\
The returned value is one of the following symbols:\n\
Jim Blandy's avatar
Jim Blandy committed
644 645 646 647 648 649
run  -- for a process that is running.\n\
stop -- for a process stopped but continuable.\n\
exit -- for a process that has exited.\n\
signal -- for a process that has got a fatal signal.\n\
open -- for a network stream connection that is open.\n\
closed -- for a network stream connection that is closed.\n\
Jim Blandy's avatar
Jim Blandy committed
650
nil -- if arg is a process name and no such process exists.\n\
Karl Heuer's avatar
Karl Heuer committed
651
PROCESS may be a process, a buffer, the name of a process, or\n\
Jim Blandy's avatar
Jim Blandy committed
652
nil, indicating the current buffer's process.")
653 654
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
655 656 657
{
  register struct Lisp_Process *p;
  register Lisp_Object status;
658

659 660
  if (STRINGP (process))
    process = Fget_process (process);
661
  else
662
    process = get_process (process);
663

664 665
  if (NILP (process))
    return process;
666

667
  p = XPROCESS (process);
Jim Blandy's avatar
Jim Blandy committed
668 669 670
  if (!NILP (p->raw_status_low))
    update_status (p);
  status = p->status;
671
  if (CONSP (status))
672
    status = XCAR (status);
673
  if (NETCONN_P (process))
Jim Blandy's avatar
Jim Blandy committed
674 675 676 677 678 679 680 681 682 683 684 685 686
    {
      if (EQ (status, Qrun))
	status = Qopen;
      else if (EQ (status, Qexit))
	status = Qclosed;
    }
  return status;
}

DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status,
       1, 1, 0,
  "Return the exit status of PROCESS or the signal number that killed it.\n\
If PROCESS has not yet exited or died, return 0.")
687 688
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
689
{
690 691 692 693
  CHECK_PROCESS (process, 0);
  if (!NILP (XPROCESS (process)->raw_status_low))
    update_status (XPROCESS (process));
  if (CONSP (XPROCESS (process)->status))
694
    return XCAR (XCDR (XPROCESS (process)->status));
Jim Blandy's avatar
Jim Blandy committed
695 696 697 698 699 700 701
  return make_number (0);
}

DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0,
  "Return the process id of PROCESS.\n\
This is the pid of the Unix process which PROCESS uses or talks to.\n\
For a network connection, this value is nil.")
702 703
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
704
{
705 706
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->pid;
Jim Blandy's avatar
Jim Blandy committed
707 708 709 710 711 712
}

DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0,
  "Return the name of PROCESS, as a string.\n\
This is the name of the program invoked in PROCESS,\n\
possibly modified to make it unique among process names.")
713 714
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
715
{
716 717
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->name;
Jim Blandy's avatar
Jim Blandy committed
718 719 720 721 722 723 724
}

DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0,
  "Return the command that was executed to start PROCESS.\n\
This is a list of strings, the first string being the program executed\n\
and the rest of the strings being the arguments given to it.\n\
For a non-child channel, this is nil.")
725 726
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
727
{
728 729
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->command;
Jim Blandy's avatar
Jim Blandy committed
730 731
}

732 733 734 735
DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0,
  "Return the name of the terminal PROCESS uses, or nil if none.\n\
This is the terminal that the process itself reads and writes on,\n\
not the name of the pty that Emacs uses to talk with that terminal.")
736 737
  (process)
     register Lisp_Object process;
738
{
739 740
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->tty_name;
741 742
}

Jim Blandy's avatar
Jim Blandy committed
743 744 745
DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer,
  2, 2, 0,
  "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
746 747
  (process, buffer)
     register Lisp_Object process, buffer;
Jim Blandy's avatar
Jim Blandy committed
748
{
749
  CHECK_PROCESS (process, 0);
Jim Blandy's avatar
Jim Blandy committed
750 751
  if (!NILP (buffer))
    CHECK_BUFFER (buffer, 1);
752
  XPROCESS (process)->buffer = buffer;
Jim Blandy's avatar
Jim Blandy committed
753 754 755 756 757 758
  return buffer;
}

DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer,
  1, 1, 0,
  "Return the buffer PROCESS is associated with.\n\
Karl Heuer's avatar
Karl Heuer committed
759
Output from PROCESS is inserted in this buffer unless PROCESS has a filter.")
760 761
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
762
{
763 764
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->buffer;
Jim Blandy's avatar
Jim Blandy committed
765 766 767 768 769
}

DEFUN ("process-mark", Fprocess_mark, Sprocess_mark,
  1, 1, 0,
  "Return the marker for the end of the last output from PROCESS.")
770 771
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
772
{
773 774
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->mark;
Jim Blandy's avatar
Jim Blandy committed
775 776 777 778 779
}

DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter,
  2, 2, 0,
  "Give PROCESS the filter function FILTER; nil means no filter.\n\
780
t means stop accepting output from the process.\n\
Jim Blandy's avatar
Jim Blandy committed
781 782 783 784
When a process has a filter, each time it does output\n\
the entire string of output is passed to the filter.\n\
The filter gets two arguments: the process and the string of output.\n\
If the process has a filter, its buffer is not used for output.")
785 786
  (process, filter)
     register Lisp_Object process, filter;
Jim Blandy's avatar
Jim Blandy committed
787
{
788
  CHECK_PROCESS (process, 0);
789
  if (EQ (filter, Qt))
790
    {
791 792
      FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask);
      FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask);
793
    }
794
  else if (EQ (XPROCESS (process)->filter, Qt))
795
    {
796 797
      FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask);
      FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask);
798
    }
799
  XPROCESS (process)->filter = filter;
Jim Blandy's avatar
Jim Blandy committed
800 801 802 803 804 805 806
  return filter;
}

DEFUN ("process-filter", Fprocess_filter, Sprocess_filter,
  1, 1, 0,
  "Returns the filter function of PROCESS; nil if none.\n\
See `set-process-filter' for more info on filter functions.")
807 808
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
809
{
810 811
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->filter;
Jim Blandy's avatar
Jim Blandy committed
812 813 814 815 816 817 818
}

DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel,
  2, 2, 0,
  "Give PROCESS the sentinel SENTINEL; nil for none.\n\
The sentinel is called as a function when the process changes state.\n\
It gets two arguments: the process, and a string describing the change.")
819 820
  (process, sentinel)
     register Lisp_Object process, sentinel;
Jim Blandy's avatar
Jim Blandy committed
821
{
822 823
  CHECK_PROCESS (process, 0);
  XPROCESS (process)->sentinel = sentinel;
Jim Blandy's avatar
Jim Blandy committed
824 825 826 827 828 829 830
  return sentinel;
}

DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel,
  1, 1, 0,
  "Return the sentinel of PROCESS; nil if none.\n\
See `set-process-sentinel' for more info on sentinels.")
831 832
  (process)
     register Lisp_Object process;
Jim Blandy's avatar
Jim Blandy committed
833
{
834 835
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->sentinel;
Jim Blandy's avatar
Jim Blandy committed
836 837
}

838 839 840
DEFUN ("set-process-window-size", Fset_process_window_size,
  Sset_process_window_size, 3, 3, 0,
  "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
841 842
  (process, height, width)
     register Lisp_Object process, height, width;
843
{
844
  CHECK_PROCESS (process, 0);
845 846
  CHECK_NATNUM (height, 0);
  CHECK_NATNUM (width, 0);
847
  if (set_window_size (XINT (XPROCESS (process)->infd),
848
		       XINT (height), XINT (width)) <= 0)
849 850 851 852 853
    return Qnil;
  else
    return Qt;
}

854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
DEFUN ("set-process-inherit-coding-system-flag",
  Fset_process_inherit_coding_system_flag,
  Sset_process_inherit_coding_system_flag, 2, 2, 0,
  "Determine whether buffer of PROCESS will inherit coding-system.\n\
If the second argument FLAG is non-nil, then the variable\n\
`buffer-file-coding-system' of the buffer associated with PROCESS\n\
will be bound to the value of the coding system used to decode\n\
the process output.\n\
\n\
This is useful when the coding system specified for the process buffer\n\
leaves either the character code conversion or the end-of-line conversion\n\
unspecified, or if the coding system used to decode the process output\n\
is more appropriate for saving the process buffer.\n\
\n\
Binding the variable `inherit-process-coding-system' to non-nil before\n\
starting the process is an alternative way of setting the inherit flag\n\
for the process which will run.")
  (process, flag)
     register Lisp_Object process, flag;
{
  CHECK_PROCESS (process, 0);
875
  XPROCESS (process)->inherit_coding_system_flag = flag;
876 877 878 879 880 881 882 883 884 885 886 887 888 889
  return flag;
}

DEFUN ("process-inherit-coding-system-flag",
  Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag,
  1, 1, 0,
  "Return the value of inherit-coding-system flag for PROCESS.\n\
If this flag is t, `buffer-file-coding-system' of the buffer\n\
associated with PROCESS will inherit the coding system used to decode\n\
the process output.")
  (process)
     register Lisp_Object process;
{
  CHECK_PROCESS (process, 0);
890
  return XPROCESS (process)->inherit_coding_system_flag;
891 892
}

Jim Blandy's avatar
Jim Blandy committed
893 894 895
DEFUN ("process-kill-without-query", Fprocess_kill_without_query,
  Sprocess_kill_without_query, 1, 2, 0,
  "Say no query needed if PROCESS is running when Emacs is exited.\n\
896
Optional second argument if non-nil says to require a query.\n\
Jim Blandy's avatar
Jim Blandy committed
897
Value is t if a query was formerly required.")
898 899
  (process, value)
     register Lisp_Object process, value;
Jim Blandy's avatar
Jim Blandy committed
900 901 902
{
  Lisp_Object tem;

903 904 905
  CHECK_PROCESS (process, 0);
  tem = XPROCESS (process)->kill_without_query;
  XPROCESS (process)->kill_without_query = Fnull (value);
Jim Blandy's avatar
Jim Blandy committed
906 907 908

  return Fnull (tem);
}
909

910 911 912 913 914 915 916 917 918 919 920
DEFUN ("process-contact", Fprocess_contact, Sprocess_contact,
  1, 1, 0,
  "Return the contact info of PROCESS; t for a real child.\n\
For a net connection, the value is a cons cell of the form (HOST SERVICE).")
  (process)
     register Lisp_Object process;
{
  CHECK_PROCESS (process, 0);
  return XPROCESS (process)->childp;
}

921 922 923
#if 0 /* Turned off because we don't currently record this info
	 in the process.  Perhaps add it.  */
DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0,
Karl Heuer's avatar
Karl Heuer committed
924 925 926
 "Return the connection type of PROCESS.\n\
The value is nil for a pipe, t or `pty' for a pty, or `stream' for\n\
a socket connection.")
927 928 929 930 931 932
  (process)
     Lisp_Object process;
{
  return XPROCESS (process)->type;
}
#endif
Jim Blandy's avatar
Jim Blandy committed
933 934 935 936 937 938 939 940 941

Lisp_Object
list_processes_1 ()
{
  register Lisp_Object tail, tem;
  Lisp_Object proc, minspace, tem1;
  register struct Lisp_Process *p;
  char tembuf[80];

942
  XSETFASTINT (minspace, 1);
Jim Blandy's avatar
Jim Blandy committed
943 944 945 946 947 948 949

  set_buffer_internal (XBUFFER (Vstandard_output));
  Fbuffer_disable_undo (Vstandard_output);

  current_buffer->truncate_lines = Qt;

  write_string ("\
950 951
Proc         Status   Buffer         Tty         Command\n\
----         ------   ------         ---         -------\n", -1);
Jim Blandy's avatar
Jim Blandy committed
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      Lisp_Object symbol;

      proc = Fcdr (Fcar (tail));
      p = XPROCESS (proc);
      if (NILP (p->childp))
	continue;

      Finsert (1, &p->name);
      Findent_to (make_number (13), minspace);

      if (!NILP (p->raw_status_low))
	update_status (p);
      symbol = p->status;
968
      if (CONSP (p->status))
969
	symbol = XCAR (p->status);
Jim Blandy's avatar
Jim Blandy committed
970 971 972 973 974 975 976 977

      
      if (EQ (symbol, Qsignal))
	{
	  Lisp_Object tem;
	  tem = Fcar (Fcdr (p->status));
#ifdef VMS
	  if (XINT (tem) < NSIG)
978
	    write_string (sys_errlist [XINT (tem)], -1);
Jim Blandy's avatar
Jim Blandy committed
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
	  else
#endif
	    Fprinc (symbol, Qnil);
	}
      else if (NETCONN_P (proc))
	{
	  if (EQ (symbol, Qrun))
	    write_string ("open", -1);
	  else if (EQ (symbol, Qexit))
	    write_string ("closed", -1);
	  else
	    Fprinc (symbol, Qnil);
	}
      else
	Fprinc (symbol, Qnil);

      if (EQ (symbol, Qexit))
	{
	  Lisp_Object tem;
	  tem = Fcar (Fcdr (p->status));
	  if (XFASTINT (tem))
	    {
1001
	      sprintf (tembuf, " %d", (int) XFASTINT (tem));
Jim Blandy's avatar
Jim Blandy committed
1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
	      write_string (tembuf, -1);
	    }
	}

      if (EQ (symbol, Qsignal) || EQ (symbol, Qexit))
	remove_process (proc);

      Findent_to (make_number (22), minspace);
      if (NILP (p->buffer))
	insert_string ("(none)");
      else if (NILP (XBUFFER (p->buffer)->name))
	insert_string ("(Killed)");
      else
	Finsert (1, &XBUFFER (p->buffer)->name);

      Findent_to (make_number (37), minspace);

1019 1020 1021 1022 1023 1024 1025
      if (STRINGP (p->tty_name))
	Finsert (1, &p->tty_name);
      else
	insert_string ("(none)");

      Findent_to (make_number (49), minspace);

Jim Blandy's avatar
Jim Blandy committed
1026 1027 1028
      if (NETCONN_P (proc))
        {
	  sprintf (tembuf, "(network stream connection to %s)\n",
1029
		   XSTRING (XCAR (p->childp))->data);
Jim Blandy's avatar
Jim Blandy committed
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
	  insert_string (tembuf);
        }
      else 
	{
	  tem = p->command;
	  while (1)
	    {
	      tem1 = Fcar (tem);
	      Finsert (1, &tem1);
	      tem = Fcdr (tem);
	      if (NILP (tem))
		break;
	      insert_string (" ");
	    }
	  insert_string ("\n");
       }
    }
  return Qnil;
}

DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "",
  "Display a list of all processes.\n\
Karl Heuer's avatar
Karl Heuer committed
1052 1053
Any process listed as exited or signaled is actually eliminated\n\
after the listing is made.")
Jim Blandy's avatar
Jim Blandy committed
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
  ()
{
  internal_with_output_to_temp_buffer ("*Process List*",
				       list_processes_1, Qnil);
  return Qnil;
}

DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0,
  "Return a list of all processes.")
  ()
{
  return Fmapcar (Qcdr, Vprocess_alist);
}

1068 1069 1070 1071
/* Starting asynchronous inferior processes.  */

static Lisp_Object start_process_unwind ();

Jim Blandy's avatar
Jim Blandy committed
1072 1073 1074 1075 1076 1077 1078 1079
DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0,
  "Start a program in a subprocess.  Return the process object for it.\n\
Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
NAME is name for process.  It is modified if necessary to make it unique.\n\
BUFFER is the buffer or (buffer-name) to associate with the process.\n\
 Process output goes at end of that buffer, unless you specify\n\
 an output stream or filter function to handle the output.\n\
 BUFFER may be also nil, meaning that this process is not associated\n\
Karl Heuer's avatar
Karl Heuer committed
1080
 with any buffer.\n\
1081
Third arg is program file name.  It is searched for in PATH.\n\
Jim Blandy's avatar
Jim Blandy committed
1082 1083 1084 1085 1086
Remaining arguments are strings to give program as arguments.")
  (nargs, args)
     int nargs;
     register Lisp_Object *args;
{
1087
  Lisp_Object buffer, name, program, proc, current_dir, tem;
Jim Blandy's avatar
Jim Blandy committed
1088 1089 1090 1091 1092 1093 1094
#ifdef VMS
  register unsigned char *new_argv;
  int len;
#else
  register unsigned char **new_argv;
#endif
  register int i;
1095
  int count = specpdl_ptr - specpdl;
Jim Blandy's avatar
Jim Blandy committed
1096 1097 1098 1099 1100

  buffer = args[1];
  if (!NILP (buffer))
    buffer = Fget_buffer_create (buffer);

1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116
  /* 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.

     We have to GCPRO around this because Fexpand_file_name and
     Funhandled_file_name_directory might call a file name handling
     function.  The argument list is protected by the caller, so all
     we really have to worry about is buffer.  */
  {
    struct gcpro gcpro1, gcpro2;

    current_dir = current_buffer->directory;

    GCPRO2 (buffer, current_dir);

1117 1118 1119
    current_dir 
      = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir),
				Qnil);
1120 1121 1122 1123 1124 1125 1126
    if (NILP (Ffile_accessible_directory_p (current_dir)))
      report_file_error ("Setting current directory",
			 Fcons (current_buffer->directory, Qnil));

    UNGCPRO;
  }

Jim Blandy's avatar
Jim Blandy committed
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
  name = args[0];
  CHECK_STRING (name, 0);

  program = args[2];

  CHECK_STRING (program, 2);

#ifdef VMS
  /* Make a one member argv with all args concatenated
     together separated by a blank.  */
1137
  len = STRING_BYTES (XSTRING (program)) + 2;
Jim Blandy's avatar
Jim Blandy committed
1138 1139 1140 1141
  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
1142
      len += STRING_BYTES (XSTRING (tem)) + 1;	/* count the blank */
Jim Blandy's avatar
Jim Blandy committed
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
    }
  new_argv = (unsigned char *) alloca (len);
  strcpy (new_argv, XSTRING (program)->data);
  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
      strcat (new_argv, " ");
      strcat (new_argv, XSTRING (tem)->data);
    }
1153 1154
  /* Need to add code here to check for program existence on VMS */
  
Jim Blandy's avatar
Jim Blandy committed
1155 1156 1157 1158
#else /* not VMS */
  new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *));

  /* If program file name is not absolute, search our path for it */
1159 1160 1161
  if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0])
      && !(XSTRING (program)->size > 1
	   && IS_DEVICE_SEP (XSTRING (program)->data[1])))
Jim Blandy's avatar
Jim Blandy committed
1162
    {
1163 1164
      struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

Jim Blandy's avatar
Jim Blandy committed
1165
      tem = Qnil;
1166
      GCPRO4 (name, program, buffer, current_dir);
1167
      openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1);
1168
      UNGCPRO;
Jim Blandy's avatar
Jim Blandy committed
1169 1170
      if (NILP (tem))
	report_file_error ("Searching for program", Fcons (program, Qnil));
1171
      tem = Fexpand_file_name (tem, Qnil);
Jim Blandy's avatar
Jim Blandy committed
1172 1173
      new_argv[0] = XSTRING (tem)->data;
    }
1174
  else
1175 1176 1177 1178 1179 1180
    {
      if (!NILP (Ffile_directory_p (program)))
	error ("Specified program for new process is a directory");

      new_argv[0] = XSTRING (program)->data;
    }
1181 1182 1183 1184 1185 1186 1187 1188

  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
      new_argv[i - 2] = XSTRING (tem)->data;
    }
  new_argv[i - 2] = 0;
Jim Blandy's avatar
Jim Blandy committed
1189 1190 1191
#endif /* not VMS */

  proc = make_process (name);
1192 1193 1194 1195 1196
  /* 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);
Jim Blandy's avatar
Jim Blandy committed
1197 1198 1199 1200 1201 1202 1203 1204

  XPROCESS (proc)->childp = Qt;
  XPROCESS (proc)->command_channel_p = Qnil;
  XPROCESS (proc)->buffer = buffer;
  XPROCESS (proc)->sentinel = Qnil;
  XPROCESS (proc)->filter = Qnil;
  XPROCESS (proc)->command = Flist (nargs - 2, args + 2);

1205 1206
  /* Make the process marker point into the process buffer (if any).  */
  if (!NILP (buffer))
1207 1208 1209
    set_marker_both (XPROCESS (proc)->mark, buffer,
		     BUF_ZV (XBUFFER (buffer)),
		     BUF_ZV_BYTE (XBUFFER (buffer)));