|
428
|
1 /* Asynchronous subprocess implementation for UNIX
|
|
|
2 Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
|
|
|
3 Free Software Foundation, Inc.
|
|
|
4 Copyright (C) 1995 Sun Microsystems, Inc.
|
|
1330
|
5 Copyright (C) 1995, 1996, 2001, 2002, 2003 Ben Wing.
|
|
428
|
6
|
|
|
7 This file is part of XEmacs.
|
|
|
8
|
|
|
9 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
10 under the terms of the GNU General Public License as published by the
|
|
|
11 Free Software Foundation; either version 2, or (at your option) any
|
|
|
12 later version.
|
|
|
13
|
|
|
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
17 for more details.
|
|
|
18
|
|
|
19 You should have received a copy of the GNU General Public License
|
|
|
20 along with XEmacs; see the file COPYING. If not, write to
|
|
|
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
22 Boston, MA 02111-1307, USA. */
|
|
|
23
|
|
771
|
24 /* Mule-ized as of 6-14-00 */
|
|
428
|
25
|
|
|
26 /* This file has been split into process.c and process-unix.c by
|
|
|
27 Kirill M. Katsnelson <kkm@kis.ru>, so please bash him and not
|
|
|
28 the original author(s) */
|
|
|
29
|
|
440
|
30 /* The IPv6 support is derived from the code for GNU Emacs-20.3
|
|
|
31 written by Wolfgang S. Rupprecht */
|
|
|
32
|
|
428
|
33 #include <config.h>
|
|
|
34
|
|
|
35 #if !defined (NO_SUBPROCESSES)
|
|
|
36
|
|
|
37 /* The entire file is within this conditional */
|
|
|
38
|
|
|
39 #include "lisp.h"
|
|
|
40
|
|
|
41 #include "buffer.h"
|
|
|
42 #include "events.h"
|
|
|
43 #include "frame.h"
|
|
|
44 #include "hash.h"
|
|
|
45 #include "lstream.h"
|
|
|
46 #include "opaque.h"
|
|
|
47 #include "process.h"
|
|
|
48 #include "procimpl.h"
|
|
|
49 #include "sysdep.h"
|
|
|
50 #include "window.h"
|
|
|
51 #include "file-coding.h"
|
|
|
52
|
|
|
53 #include <setjmp.h>
|
|
853
|
54 #include "sysdir.h"
|
|
428
|
55 #include "sysfile.h"
|
|
|
56 #include "sysproc.h"
|
|
859
|
57 #include "syssignal.h"
|
|
428
|
58 #include "systime.h"
|
|
|
59 #include "systty.h"
|
|
|
60 #include "syswait.h"
|
|
|
61
|
|
442
|
62 #ifdef HPUX
|
|
|
63 #include <grp.h> /* See grantpt fixups for HPUX below. */
|
|
|
64 #endif
|
|
428
|
65
|
|
502
|
66 #if defined (HAVE_GETADDRINFO) && defined (HAVE_GETNAMEINFO)
|
|
|
67 #define USE_GETADDRINFO
|
|
|
68 #endif
|
|
|
69
|
|
|
70
|
|
428
|
71 /*
|
|
|
72 * Implementation-specific data. Pointed to by Lisp_Process->process_data
|
|
|
73 */
|
|
|
74
|
|
|
75 struct unix_process_data
|
|
|
76 {
|
|
|
77 /* Non-0 if this is really a ToolTalk channel. */
|
|
|
78 int connected_via_filedesc_p;
|
|
|
79 /* Descriptor by which we read from this process. -1 for dead process */
|
|
|
80 int infd;
|
|
853
|
81 /* Descriptor by which we read stderr from this process. -1 for
|
|
|
82 dead process */
|
|
|
83 int errfd;
|
|
428
|
84 /* Descriptor for the tty which this process is using.
|
|
|
85 -1 if we didn't record it (on some systems, there's no need). */
|
|
|
86 int subtty;
|
|
|
87 /* Non-false if communicating through a pty. */
|
|
|
88 char pty_flag;
|
|
|
89 };
|
|
853
|
90 #define UNIX_DATA(p) ((struct unix_process_data*) ((p)->process_data))
|
|
428
|
91
|
|
|
92
|
|
|
93
|
|
|
94 /**********************************************************************/
|
|
|
95 /* Static helper routines */
|
|
|
96 /**********************************************************************/
|
|
|
97
|
|
|
98 static SIGTYPE
|
|
2286
|
99 close_safely_handler (int SIG_ARG_MAYBE_UNUSED (signo))
|
|
428
|
100 {
|
|
|
101 EMACS_REESTABLISH_SIGNAL (signo, close_safely_handler);
|
|
|
102 SIGRETURN;
|
|
|
103 }
|
|
|
104
|
|
|
105 static void
|
|
|
106 close_safely (int fd)
|
|
|
107 {
|
|
|
108 stop_interrupts ();
|
|
613
|
109 set_timeout_signal (SIGALRM, close_safely_handler);
|
|
428
|
110 alarm (1);
|
|
771
|
111 retry_close (fd);
|
|
428
|
112 alarm (0);
|
|
|
113 start_interrupts ();
|
|
|
114 }
|
|
|
115
|
|
|
116 static void
|
|
|
117 close_descriptor_pair (int in, int out)
|
|
|
118 {
|
|
|
119 if (in >= 0)
|
|
771
|
120 retry_close (in);
|
|
428
|
121 if (out != in && out >= 0)
|
|
771
|
122 retry_close (out);
|
|
428
|
123 }
|
|
|
124
|
|
|
125 /* Close all descriptors currently in use for communication
|
|
|
126 with subprocess. This is used in a newly-forked subprocess
|
|
|
127 to get rid of irrelevant descriptors. */
|
|
|
128
|
|
|
129 static int
|
|
2286
|
130 close_process_descs_mapfun (const void *UNUSED (key), void *contents,
|
|
|
131 void *UNUSED (arg))
|
|
428
|
132 {
|
|
853
|
133 Lisp_Object proc = VOID_TO_LISP (contents);
|
|
|
134 USID vaffan, culo;
|
|
|
135
|
|
|
136 event_stream_delete_io_streams (XPROCESS (proc)->pipe_instream,
|
|
|
137 XPROCESS (proc)->pipe_outstream,
|
|
|
138 XPROCESS (proc)->pipe_errstream,
|
|
|
139 &vaffan, &culo);
|
|
428
|
140 return 0;
|
|
|
141 }
|
|
|
142
|
|
|
143 void
|
|
|
144 close_process_descs (void)
|
|
|
145 {
|
|
|
146 maphash (close_process_descs_mapfun, usid_to_process, 0);
|
|
|
147 }
|
|
|
148
|
|
|
149 /* connect to an existing file descriptor. This is very similar to
|
|
|
150 open-network-stream except that it assumes that the connection has
|
|
|
151 already been initialized. It is currently used for ToolTalk
|
|
|
152 communication. */
|
|
|
153
|
|
|
154 /* This function used to be visible on the Lisp level, but there is no
|
|
|
155 real point in doing that. Here is the doc string:
|
|
|
156
|
|
442
|
157 "Connect to an existing file descriptor.
|
|
|
158 Return a subprocess-object to represent the connection.
|
|
|
159 Input and output work as for subprocesses; `delete-process' closes it.
|
|
|
160 Args are NAME BUFFER INFD OUTFD.
|
|
|
161 NAME is name for process. It is modified if necessary to make it unique.
|
|
|
162 BUFFER is the buffer (or buffer-name) to associate with the process.
|
|
|
163 Process output goes at end of that buffer, unless you specify
|
|
|
164 an output stream or filter function to handle the output.
|
|
|
165 BUFFER may also be nil, meaning that this process is not associated
|
|
|
166 with any buffer.
|
|
|
167 INFD and OUTFD specify the file descriptors to use for input and
|
|
428
|
168 output, respectively."
|
|
|
169 */
|
|
|
170
|
|
|
171 Lisp_Object
|
|
|
172 connect_to_file_descriptor (Lisp_Object name, Lisp_Object buffer,
|
|
|
173 Lisp_Object infd, Lisp_Object outfd)
|
|
|
174 {
|
|
|
175 /* This function can GC */
|
|
|
176 Lisp_Object proc;
|
|
|
177 int inch;
|
|
|
178
|
|
|
179 CHECK_STRING (name);
|
|
|
180 CHECK_INT (infd);
|
|
|
181 CHECK_INT (outfd);
|
|
|
182
|
|
|
183 inch = XINT (infd);
|
|
442
|
184 if (get_process_from_usid (FD_TO_USID (inch)))
|
|
|
185 invalid_operation ("There is already a process connected to fd", infd);
|
|
428
|
186 if (!NILP (buffer))
|
|
|
187 buffer = Fget_buffer_create (buffer);
|
|
|
188 proc = make_process_internal (name);
|
|
|
189
|
|
|
190 XPROCESS (proc)->pid = Fcons (infd, name);
|
|
|
191 XPROCESS (proc)->buffer = buffer;
|
|
853
|
192 init_process_io_handles (XPROCESS (proc), (void *) inch,
|
|
|
193 (void *) XINT (outfd), (void *) -1, 0);
|
|
428
|
194 UNIX_DATA (XPROCESS (proc))->connected_via_filedesc_p = 1;
|
|
|
195
|
|
853
|
196 event_stream_select_process (XPROCESS (proc), 1, 1);
|
|
428
|
197
|
|
|
198 return proc;
|
|
|
199 }
|
|
|
200
|
|
442
|
201 static int allocate_pty_the_old_fashioned_way (void);
|
|
|
202
|
|
|
203 /* The file name of the (slave) pty opened by allocate_pty(). */
|
|
|
204 #ifndef MAX_PTYNAME_LEN
|
|
|
205 #define MAX_PTYNAME_LEN 64
|
|
|
206 #endif
|
|
867
|
207 static Ibyte pty_name[MAX_PTYNAME_LEN];
|
|
428
|
208
|
|
|
209 /* Open an available pty, returning a file descriptor.
|
|
|
210 Return -1 on failure.
|
|
|
211 The file name of the terminal corresponding to the pty
|
|
442
|
212 is left in the variable `pty_name'. */
|
|
428
|
213
|
|
|
214 static int
|
|
|
215 allocate_pty (void)
|
|
|
216 {
|
|
442
|
217 /* Unix98 standardized grantpt, unlockpt, and ptsname, but not the
|
|
|
218 functions required to open a master pty in the first place :-(
|
|
|
219
|
|
|
220 Modern Unix systems all seems to have convenience methods to open
|
|
|
221 a master pty fd in one function call, but there is little
|
|
|
222 agreement on how to do it.
|
|
|
223
|
|
|
224 allocate_pty() tries all the different known easy ways of opening
|
|
|
225 a pty. In case of failure, we resort to the old BSD-style pty
|
|
|
226 grovelling code in allocate_pty_the_old_fashioned_way(). */
|
|
|
227 int master_fd = -1;
|
|
771
|
228 const Extbyte *slave_name = NULL;
|
|
867
|
229 const CIbyte *clone = NULL;
|
|
|
230 static const CIbyte * const clones[] =
|
|
771
|
231 /* Different pty master clone devices */
|
|
442
|
232 {
|
|
|
233 "/dev/ptmx", /* Various systems */
|
|
|
234 "/dev/ptm/clone", /* HPUX */
|
|
|
235 "/dev/ptc", /* AIX */
|
|
|
236 "/dev/ptmx_bsd" /* Tru64 */
|
|
|
237 };
|
|
|
238
|
|
|
239 #ifdef HAVE_GETPT /* glibc */
|
|
|
240 master_fd = getpt ();
|
|
|
241 if (master_fd >= 0)
|
|
|
242 goto have_master;
|
|
|
243 #endif /* HAVE_GETPT */
|
|
|
244
|
|
|
245
|
|
|
246 #if defined(HAVE_OPENPTY) /* BSD, Tru64, glibc */
|
|
|
247 {
|
|
|
248 int slave_fd = -1;
|
|
|
249 int rc;
|
|
|
250 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
251 rc = openpty (&master_fd, &slave_fd, NULL, NULL, NULL);
|
|
|
252 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
253 if (rc == 0)
|
|
|
254 {
|
|
|
255 slave_name = ttyname (slave_fd);
|
|
771
|
256 retry_close (slave_fd);
|
|
442
|
257 goto have_slave_name;
|
|
|
258 }
|
|
|
259 else
|
|
|
260 {
|
|
|
261 if (master_fd >= 0)
|
|
771
|
262 retry_close (master_fd);
|
|
442
|
263 if (slave_fd >= 0)
|
|
771
|
264 retry_close (slave_fd);
|
|
442
|
265 }
|
|
|
266 }
|
|
|
267 #endif /* HAVE_OPENPTY */
|
|
|
268
|
|
|
269 #if defined(HAVE__GETPTY) && defined (O_NDELAY) /* SGI */
|
|
|
270 master_fd = -1;
|
|
|
271 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
272 slave_name = _getpty (&master_fd, O_RDWR | O_NDELAY, 0600, 0);
|
|
|
273 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
274 if (master_fd >= 0 && slave_name != NULL)
|
|
|
275 goto have_slave_name;
|
|
|
276 #endif /* HAVE__GETPTY */
|
|
|
277
|
|
|
278 /* Master clone devices are available on most systems */
|
|
|
279 {
|
|
|
280 int i;
|
|
|
281 for (i = 0; i < countof (clones); i++)
|
|
|
282 {
|
|
|
283 clone = clones[i];
|
|
867
|
284 master_fd = qxe_open ((Ibyte *) clone,
|
|
771
|
285 O_RDWR | O_NONBLOCK | OPEN_BINARY, 0);
|
|
442
|
286 if (master_fd >= 0)
|
|
|
287 goto have_master;
|
|
|
288 }
|
|
|
289 clone = NULL;
|
|
|
290 }
|
|
|
291
|
|
|
292 goto lose;
|
|
|
293
|
|
|
294 have_master:
|
|
|
295
|
|
|
296 #if defined (HAVE_PTSNAME)
|
|
|
297 slave_name = ptsname (master_fd);
|
|
|
298 if (slave_name)
|
|
|
299 goto have_slave_name;
|
|
|
300 #endif
|
|
|
301
|
|
|
302 /* AIX docs say to use ttyname, not ptsname, to get slave_name */
|
|
|
303 if (clone
|
|
|
304 && !strcmp (clone, "/dev/ptc")
|
|
|
305 && (slave_name = ttyname (master_fd)) != NULL)
|
|
|
306 goto have_slave_name;
|
|
|
307
|
|
|
308 goto lose;
|
|
|
309
|
|
|
310 have_slave_name:
|
|
771
|
311 {
|
|
867
|
312 Ibyte *slaveint;
|
|
771
|
313
|
|
|
314 EXTERNAL_TO_C_STRING (slave_name, slaveint, Qfile_name);
|
|
|
315 qxestrncpy (pty_name, slaveint, sizeof (pty_name));
|
|
|
316 }
|
|
|
317
|
|
442
|
318 pty_name[sizeof (pty_name) - 1] = '\0';
|
|
|
319 setup_pty (master_fd);
|
|
|
320
|
|
|
321 /* We jump through some hoops to frob the pty.
|
|
|
322 It's not obvious that checking the return code here is useful. */
|
|
|
323
|
|
|
324 /* "The grantpt() function will fail if it is unable to successfully
|
|
|
325 invoke the setuid root program. It may also fail if the
|
|
|
326 application has installed a signal handler to catch SIGCHLD
|
|
|
327 signals." */
|
|
|
328 #if defined (HAVE_GRANTPT) || defined (HAVE_UNLOCKPT)
|
|
|
329 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
330
|
|
|
331 #if defined (HAVE_GRANTPT)
|
|
|
332 grantpt (master_fd);
|
|
|
333 #ifdef HPUX
|
|
|
334 /* grantpt() behavior on some versions of HP-UX differs from what's
|
|
|
335 specified in the man page: the group of the slave PTY is set to
|
|
|
336 the user's primary group, and we fix that. */
|
|
|
337 {
|
|
|
338 struct group *tty_group = getgrnam ("tty");
|
|
|
339 if (tty_group != NULL)
|
|
771
|
340 {
|
|
|
341 Extbyte *ptyout;
|
|
|
342
|
|
|
343 C_STRING_TO_EXTERNAL (pty_name, ptyout, Qfile_name);
|
|
|
344 chown (ptyout, (uid_t) -1, tty_group->gr_gid);
|
|
|
345 }
|
|
442
|
346 }
|
|
|
347 #endif /* HPUX has broken grantpt() */
|
|
|
348 #endif /* HAVE_GRANTPT */
|
|
|
349
|
|
|
350 #if defined (HAVE_UNLOCKPT)
|
|
|
351 unlockpt (master_fd);
|
|
|
352 #endif
|
|
|
353
|
|
|
354 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
355 #endif /* HAVE_GRANTPT || HAVE_UNLOCKPT */
|
|
|
356
|
|
|
357 return master_fd;
|
|
|
358
|
|
|
359 lose:
|
|
|
360 if (master_fd >= 0)
|
|
771
|
361 retry_close (master_fd);
|
|
442
|
362 return allocate_pty_the_old_fashioned_way ();
|
|
|
363 }
|
|
|
364
|
|
|
365 /* This function tries to allocate a pty by iterating through file
|
|
|
366 pairs with names like /dev/ptyp1 and /dev/ttyp1. */
|
|
|
367 static int
|
|
|
368 allocate_pty_the_old_fashioned_way (void)
|
|
|
369 {
|
|
428
|
370 struct stat stb;
|
|
|
371
|
|
|
372 /* Some systems name their pseudoterminals so that there are gaps in
|
|
|
373 the usual sequence - for example, on HP9000/S700 systems, there
|
|
|
374 are no pseudoterminals with names ending in 'f'. So we wait for
|
|
|
375 three failures in a row before deciding that we've reached the
|
|
|
376 end of the ptys. */
|
|
|
377 int failed_count = 0;
|
|
|
378 int fd;
|
|
|
379 int i;
|
|
|
380 int c;
|
|
|
381
|
|
|
382 #ifdef PTY_ITERATION
|
|
|
383 PTY_ITERATION
|
|
|
384 #else
|
|
442
|
385 # ifndef FIRST_PTY_LETTER
|
|
|
386 # define FIRST_PTY_LETTER 'p'
|
|
|
387 # endif
|
|
428
|
388 for (c = FIRST_PTY_LETTER; c <= 'z'; c++)
|
|
|
389 for (i = 0; i < 16; i++)
|
|
442
|
390 #endif /* PTY_ITERATION */
|
|
|
391
|
|
428
|
392 {
|
|
|
393 #ifdef PTY_NAME_SPRINTF
|
|
|
394 PTY_NAME_SPRINTF
|
|
|
395 #else
|
|
771
|
396 qxesprintf (pty_name, "/dev/pty%c%x", c, i);
|
|
428
|
397 #endif /* no PTY_NAME_SPRINTF */
|
|
|
398
|
|
771
|
399 if (qxe_stat (pty_name, &stb) < 0)
|
|
428
|
400 {
|
|
442
|
401 if (++failed_count >= 3)
|
|
428
|
402 return -1;
|
|
|
403 }
|
|
|
404 else
|
|
|
405 failed_count = 0;
|
|
771
|
406 fd = qxe_open (pty_name, O_RDWR | O_NONBLOCK | OPEN_BINARY, 0);
|
|
428
|
407
|
|
|
408 if (fd >= 0)
|
|
|
409 {
|
|
|
410 #ifdef PTY_TTY_NAME_SPRINTF
|
|
|
411 PTY_TTY_NAME_SPRINTF
|
|
|
412 #else
|
|
771
|
413 qxesprintf (pty_name, "/dev/tty%c%x", c, i);
|
|
428
|
414 #endif /* no PTY_TTY_NAME_SPRINTF */
|
|
771
|
415 if (qxe_access (pty_name, R_OK | W_OK) == 0)
|
|
428
|
416 {
|
|
442
|
417 setup_pty (fd);
|
|
|
418 return fd;
|
|
428
|
419 }
|
|
771
|
420 retry_close (fd);
|
|
428
|
421 }
|
|
442
|
422 } /* iteration */
|
|
428
|
423 return -1;
|
|
|
424 }
|
|
|
425
|
|
|
426 static int
|
|
|
427 create_bidirectional_pipe (int *inchannel, int *outchannel,
|
|
|
428 volatile int *forkin, volatile int *forkout)
|
|
|
429 {
|
|
|
430 int sv[2];
|
|
|
431
|
|
|
432 #ifdef SKTPAIR
|
|
|
433 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0)
|
|
|
434 return -1;
|
|
|
435 *outchannel = *inchannel = sv[0];
|
|
|
436 *forkout = *forkin = sv[1];
|
|
|
437 #else /* not SKTPAIR */
|
|
|
438 int temp;
|
|
|
439 temp = pipe (sv);
|
|
|
440 if (temp < 0) return -1;
|
|
|
441 *inchannel = sv[0];
|
|
|
442 *forkout = sv[1];
|
|
|
443 temp = pipe (sv);
|
|
|
444 if (temp < 0) return -1;
|
|
|
445 *outchannel = sv[1];
|
|
|
446 *forkin = sv[0];
|
|
|
447 #endif /* not SKTPAIR */
|
|
|
448 return 0;
|
|
|
449 }
|
|
|
450
|
|
|
451
|
|
|
452 #ifdef HAVE_SOCKETS
|
|
|
453
|
|
502
|
454 #ifndef USE_GETADDRINFO
|
|
428
|
455 static int
|
|
|
456 get_internet_address (Lisp_Object host, struct sockaddr_in *address,
|
|
578
|
457 Error_Behavior errb)
|
|
428
|
458 {
|
|
|
459 struct hostent *host_info_ptr = NULL;
|
|
|
460 #ifdef TRY_AGAIN
|
|
|
461 int count = 0;
|
|
|
462 #endif
|
|
|
463
|
|
|
464 xzero (*address);
|
|
|
465
|
|
|
466 while (1)
|
|
|
467 {
|
|
771
|
468 Extbyte *hostext;
|
|
|
469
|
|
428
|
470 #ifdef TRY_AGAIN
|
|
|
471 if (count++ > 10) break;
|
|
|
472 h_errno = 0;
|
|
|
473 #endif
|
|
771
|
474
|
|
1204
|
475 LISP_STRING_TO_EXTERNAL (host, hostext, Qunix_host_name_encoding);
|
|
771
|
476
|
|
428
|
477 /* Some systems can't handle SIGIO/SIGALARM in gethostbyname. */
|
|
|
478 slow_down_interrupts ();
|
|
771
|
479 host_info_ptr = gethostbyname (hostext);
|
|
428
|
480 speed_up_interrupts ();
|
|
|
481 #ifdef TRY_AGAIN
|
|
|
482 if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN))
|
|
|
483 #endif
|
|
|
484 break;
|
|
|
485 Fsleep_for (make_int (1));
|
|
|
486 }
|
|
|
487 if (host_info_ptr)
|
|
|
488 {
|
|
|
489 address->sin_family = host_info_ptr->h_addrtype;
|
|
502
|
490 memcpy (&address->sin_addr, host_info_ptr->h_addr,
|
|
|
491 host_info_ptr->h_length);
|
|
428
|
492 }
|
|
|
493 else
|
|
|
494 {
|
|
|
495 IN_ADDR numeric_addr;
|
|
1204
|
496 Extbyte *hostext;
|
|
|
497
|
|
428
|
498 /* Attempt to interpret host as numeric inet address */
|
|
1204
|
499 LISP_STRING_TO_EXTERNAL (host, hostext, Qunix_host_name_encoding);
|
|
|
500 numeric_addr = inet_addr (hostext);
|
|
428
|
501 if (NUMERIC_ADDR_ERROR)
|
|
|
502 {
|
|
563
|
503 maybe_signal_error (Qio_error, "Unknown host", host,
|
|
1204
|
504 Qprocess, errb);
|
|
428
|
505 return 0;
|
|
|
506 }
|
|
|
507
|
|
|
508 /* There was some broken code here that called strlen() here
|
|
|
509 on (char *) &numeric_addr and even sometimes accessed
|
|
|
510 uninitialized data. */
|
|
|
511 address->sin_family = AF_INET;
|
|
|
512 * (IN_ADDR *) &address->sin_addr = numeric_addr;
|
|
|
513 }
|
|
|
514
|
|
|
515 return 1;
|
|
|
516 }
|
|
502
|
517 #endif /* !USE_GETADDRINFO */
|
|
428
|
518
|
|
|
519 static void
|
|
2286
|
520 set_socket_nonblocking_maybe (int fd,
|
|
|
521 #ifdef PROCESS_IO_BLOCKING
|
|
|
522 int port, const char *proto
|
|
|
523 #else
|
|
|
524 int UNUSED (port), const char *UNUSED (proto)
|
|
|
525 #endif
|
|
|
526 )
|
|
428
|
527 {
|
|
|
528 #ifdef PROCESS_IO_BLOCKING
|
|
|
529 Lisp_Object tail;
|
|
|
530
|
|
|
531 for (tail = network_stream_blocking_port_list; CONSP (tail); tail = XCDR (tail))
|
|
|
532 {
|
|
|
533 Lisp_Object tail_port = XCAR (tail);
|
|
|
534
|
|
|
535 if (STRINGP (tail_port))
|
|
|
536 {
|
|
|
537 struct servent *svc_info;
|
|
771
|
538 Extbyte *tailportext;
|
|
|
539
|
|
428
|
540 CHECK_STRING (tail_port);
|
|
771
|
541 TO_EXTERNAL_FORMAT (LISP_STRING, tail_port, C_STRING_ALLOCA,
|
|
|
542 tailportext, Qnative);
|
|
|
543
|
|
|
544 svc_info = getservbyname (tailportext, proto);
|
|
428
|
545 if ((svc_info != 0) && (svc_info->s_port == port))
|
|
|
546 break;
|
|
|
547 else
|
|
|
548 continue;
|
|
|
549 }
|
|
|
550 else if (INTP (tail_port) && (htons ((unsigned short) XINT (tail_port)) == port))
|
|
|
551 break;
|
|
|
552 }
|
|
|
553
|
|
|
554 if (!CONSP (tail))
|
|
|
555 {
|
|
|
556 set_descriptor_non_blocking (fd);
|
|
|
557 }
|
|
|
558 #else
|
|
|
559 set_descriptor_non_blocking (fd);
|
|
|
560 #endif /* PROCESS_IO_BLOCKING */
|
|
|
561 }
|
|
|
562
|
|
|
563 #endif /* HAVE_SOCKETS */
|
|
|
564
|
|
|
565 /* Compute the Lisp form of the process status from
|
|
|
566 the numeric status that was returned by `wait'. */
|
|
|
567
|
|
|
568 static void
|
|
440
|
569 update_status_from_wait_code (Lisp_Process *p, int *w_fmh)
|
|
428
|
570 {
|
|
|
571 /* C compiler lossage when attempting to pass w directly */
|
|
|
572 int w = *w_fmh;
|
|
|
573
|
|
|
574 if (WIFSTOPPED (w))
|
|
|
575 {
|
|
|
576 p->status_symbol = Qstop;
|
|
|
577 p->exit_code = WSTOPSIG (w);
|
|
|
578 p->core_dumped = 0;
|
|
|
579 }
|
|
|
580 else if (WIFEXITED (w))
|
|
|
581 {
|
|
|
582 p->status_symbol = Qexit;
|
|
|
583 p->exit_code = WEXITSTATUS (w);
|
|
|
584 p->core_dumped = 0;
|
|
|
585 }
|
|
|
586 else if (WIFSIGNALED (w))
|
|
|
587 {
|
|
|
588 p->status_symbol = Qsignal;
|
|
|
589 p->exit_code = WTERMSIG (w);
|
|
|
590 p->core_dumped = WCOREDUMP (w);
|
|
|
591 }
|
|
|
592 else
|
|
|
593 {
|
|
|
594 p->status_symbol = Qrun;
|
|
|
595 p->exit_code = 0;
|
|
|
596 }
|
|
|
597 }
|
|
|
598
|
|
|
599 #ifdef SIGCHLD
|
|
|
600
|
|
|
601 #define MAX_EXITED_PROCESSES 1000
|
|
|
602 static volatile pid_t exited_processes[MAX_EXITED_PROCESSES];
|
|
|
603 static volatile int exited_processes_status[MAX_EXITED_PROCESSES];
|
|
|
604 static volatile int exited_processes_index;
|
|
|
605
|
|
|
606 static volatile int sigchld_happened;
|
|
|
607
|
|
|
608 /* On receipt of a signal that a child status has changed,
|
|
|
609 loop asking about children with changed statuses until
|
|
|
610 the system says there are no more. All we do is record
|
|
|
611 the processes and wait status.
|
|
|
612
|
|
|
613 This function could be called from within the SIGCHLD
|
|
|
614 handler, so it must be completely reentrant. When
|
|
|
615 not called from a SIGCHLD handler, BLOCK_SIGCHLD should
|
|
|
616 be non-zero so that SIGCHLD is blocked while this
|
|
|
617 function is running. (This is necessary so avoid
|
|
|
618 race conditions with the SIGCHLD_HAPPENED flag). */
|
|
|
619
|
|
|
620 static void
|
|
|
621 record_exited_processes (int block_sigchld)
|
|
|
622 {
|
|
|
623 if (!sigchld_happened)
|
|
|
624 {
|
|
|
625 return;
|
|
|
626 }
|
|
|
627
|
|
|
628 #ifdef EMACS_BLOCK_SIGNAL
|
|
|
629 if (block_sigchld)
|
|
|
630 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
631 #endif
|
|
|
632
|
|
|
633 while (sigchld_happened)
|
|
|
634 {
|
|
|
635 int pid;
|
|
|
636 int w;
|
|
|
637
|
|
|
638 /* Keep trying to get a status until we get a definitive result. */
|
|
|
639 do
|
|
|
640 {
|
|
|
641 errno = 0;
|
|
|
642 #ifdef WNOHANG
|
|
|
643 # ifndef WUNTRACED
|
|
|
644 # define WUNTRACED 0
|
|
|
645 # endif /* not WUNTRACED */
|
|
|
646 # ifdef HAVE_WAITPID
|
|
|
647 pid = waitpid ((pid_t) -1, &w, WNOHANG | WUNTRACED);
|
|
|
648 # else
|
|
|
649 pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
|
|
|
650 # endif
|
|
|
651 #else /* not WNOHANG */
|
|
|
652 pid = wait (&w);
|
|
|
653 #endif /* not WNOHANG */
|
|
|
654 }
|
|
|
655 while (pid <= 0 && errno == EINTR);
|
|
|
656
|
|
|
657 if (pid <= 0)
|
|
|
658 break;
|
|
|
659
|
|
|
660 if (exited_processes_index < MAX_EXITED_PROCESSES)
|
|
|
661 {
|
|
|
662 exited_processes[exited_processes_index] = pid;
|
|
|
663 exited_processes_status[exited_processes_index] = w;
|
|
|
664 exited_processes_index++;
|
|
|
665 }
|
|
|
666
|
|
|
667 /* On systems with WNOHANG, we just ignore the number
|
|
|
668 of times that SIGCHLD was signalled, and keep looping
|
|
|
669 until there are no more processes to wait on. If we
|
|
|
670 don't have WNOHANG, we have to rely on the count in
|
|
|
671 SIGCHLD_HAPPENED. */
|
|
|
672 #ifndef WNOHANG
|
|
|
673 sigchld_happened--;
|
|
|
674 #endif /* not WNOHANG */
|
|
|
675 }
|
|
|
676
|
|
|
677 sigchld_happened = 0;
|
|
|
678
|
|
|
679 if (block_sigchld)
|
|
|
680 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
681 }
|
|
|
682
|
|
|
683 /* For any processes that have changed status and are recorded
|
|
440
|
684 and such, update the corresponding Lisp_Process.
|
|
428
|
685 We separate this from record_exited_processes() so that
|
|
|
686 we never have to call this function from within a signal
|
|
|
687 handler. We block SIGCHLD in case record_exited_processes()
|
|
|
688 is called from a signal handler. */
|
|
|
689
|
|
|
690 /** USG WARNING: Although it is not obvious from the documentation
|
|
|
691 in signal(2), on a USG system the SIGCLD handler MUST NOT call
|
|
|
692 signal() before executing at least one wait(), otherwise the handler
|
|
|
693 will be called again, resulting in an infinite loop. The relevant
|
|
|
694 portion of the documentation reads "SIGCLD signals will be queued
|
|
|
695 and the signal-catching function will be continually reentered until
|
|
|
696 the queue is empty". Invoking signal() causes the kernel to reexamine
|
|
|
697 the SIGCLD queue. Fred Fish, UniSoft Systems Inc.
|
|
|
698
|
|
|
699 (Note that now this only applies in SYS V Release 2 and before.
|
|
|
700 On SYS V Release 3, we use sigset() to set the signal handler for
|
|
|
701 the first time, and so we don't have to reestablish the signal handler
|
|
|
702 in the handler below. On SYS V Release 4, we don't get this weirdo
|
|
|
703 behavior when we use sigaction(), which we do use.) */
|
|
|
704
|
|
|
705 static SIGTYPE
|
|
2286
|
706 sigchld_handler (int SIG_ARG_MAYBE_UNUSED (signo))
|
|
428
|
707 {
|
|
|
708 #ifdef OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR
|
|
|
709 int old_errno = errno;
|
|
|
710
|
|
|
711 sigchld_happened++;
|
|
|
712 record_exited_processes (0);
|
|
|
713 errno = old_errno;
|
|
|
714 #else
|
|
|
715 sigchld_happened++;
|
|
|
716 #endif
|
|
|
717 #ifdef HAVE_UNIXOID_EVENT_LOOP
|
|
|
718 signal_fake_event ();
|
|
|
719 #endif
|
|
|
720 /* WARNING - must come after wait3() for USG systems */
|
|
|
721 EMACS_REESTABLISH_SIGNAL (signo, sigchld_handler);
|
|
|
722 SIGRETURN;
|
|
|
723 }
|
|
|
724
|
|
|
725 #endif /* SIGCHLD */
|
|
|
726
|
|
|
727 #ifdef SIGNALS_VIA_CHARACTERS
|
|
|
728 /* Get signal character to send to process if SIGNALS_VIA_CHARACTERS */
|
|
|
729
|
|
|
730 static int
|
|
|
731 process_signal_char (int tty_fd, int signo)
|
|
|
732 {
|
|
|
733 /* If it's not a tty, pray that these default values work */
|
|
853
|
734 if (! isatty (tty_fd))
|
|
|
735 {
|
|
428
|
736 #define CNTL(ch) (037 & (ch))
|
|
853
|
737 switch (signo)
|
|
|
738 {
|
|
|
739 case SIGINT: return CNTL ('C');
|
|
|
740 case SIGQUIT: return CNTL ('\\');
|
|
428
|
741 #ifdef SIGTSTP
|
|
853
|
742 case SIGTSTP: return CNTL ('Z');
|
|
428
|
743 #endif
|
|
853
|
744 }
|
|
|
745 }
|
|
428
|
746
|
|
|
747 #ifdef HAVE_TERMIOS
|
|
|
748 /* TERMIOS is the latest and bestest, and seems most likely to work.
|
|
|
749 If the system has it, use it. */
|
|
|
750 {
|
|
|
751 struct termios t;
|
|
|
752 tcgetattr (tty_fd, &t);
|
|
|
753 switch (signo)
|
|
|
754 {
|
|
|
755 case SIGINT: return t.c_cc[VINTR];
|
|
|
756 case SIGQUIT: return t.c_cc[VQUIT];
|
|
|
757 #if defined(SIGTSTP) && defined(VSUSP)
|
|
|
758 case SIGTSTP: return t.c_cc[VSUSP];
|
|
|
759 #endif
|
|
|
760 }
|
|
|
761 }
|
|
|
762
|
|
|
763 # elif defined (TIOCGLTC) && defined (TIOCGETC) /* not HAVE_TERMIOS */
|
|
|
764 {
|
|
|
765 /* On Berkeley descendants, the following IOCTL's retrieve the
|
|
|
766 current control characters. */
|
|
|
767 struct tchars c;
|
|
|
768 struct ltchars lc;
|
|
|
769 switch (signo)
|
|
|
770 {
|
|
|
771 case SIGINT: ioctl (tty_fd, TIOCGETC, &c); return c.t_intrc;
|
|
|
772 case SIGQUIT: ioctl (tty_fd, TIOCGETC, &c); return c.t_quitc;
|
|
|
773 # ifdef SIGTSTP
|
|
|
774 case SIGTSTP: ioctl (tty_fd, TIOCGLTC, &lc); return lc.t_suspc;
|
|
|
775 # endif /* SIGTSTP */
|
|
|
776 }
|
|
|
777 }
|
|
|
778
|
|
|
779 # elif defined (TCGETA) /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
|
|
|
780 {
|
|
|
781 /* On SYSV descendants, the TCGETA ioctl retrieves the current
|
|
|
782 control characters. */
|
|
|
783 struct termio t;
|
|
|
784 ioctl (tty_fd, TCGETA, &t);
|
|
|
785 switch (signo) {
|
|
|
786 case SIGINT: return t.c_cc[VINTR];
|
|
|
787 case SIGQUIT: return t.c_cc[VQUIT];
|
|
|
788 # ifdef SIGTSTP
|
|
|
789 case SIGTSTP: return t.c_cc[VSWTCH];
|
|
|
790 # endif /* SIGTSTP */
|
|
|
791 }
|
|
|
792 }
|
|
|
793 # else /* ! defined (TCGETA) */
|
|
|
794 #error ERROR! Using SIGNALS_VIA_CHARACTERS, but not HAVE_TERMIOS || (TIOCGLTC && TIOCGETC) || TCGETA
|
|
|
795 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
|
|
|
796 you'd better be using one of the alternatives above! */
|
|
|
797 # endif /* ! defined (TCGETA) */
|
|
|
798 return '\0';
|
|
|
799 }
|
|
|
800 #endif /* SIGNALS_VIA_CHARACTERS */
|
|
|
801
|
|
|
802
|
|
|
803
|
|
|
804
|
|
|
805 /**********************************************************************/
|
|
|
806 /* Process implementation methods */
|
|
|
807 /**********************************************************************/
|
|
|
808
|
|
|
809 /*
|
|
|
810 * Allocate and initialize Lisp_Process->process_data
|
|
|
811 */
|
|
|
812
|
|
|
813 static void
|
|
440
|
814 unix_alloc_process_data (Lisp_Process *p)
|
|
428
|
815 {
|
|
|
816 p->process_data = xnew (struct unix_process_data);
|
|
|
817
|
|
1204
|
818 UNIX_DATA (p)->connected_via_filedesc_p = 0;
|
|
|
819 UNIX_DATA (p)->infd = -1;
|
|
|
820 UNIX_DATA (p)->errfd = -1;
|
|
|
821 UNIX_DATA (p)->subtty = -1;
|
|
|
822 UNIX_DATA (p)->pty_flag = 0;
|
|
428
|
823 }
|
|
|
824
|
|
|
825 /*
|
|
|
826 * Initialize XEmacs process implementation once
|
|
|
827 */
|
|
|
828
|
|
|
829 #ifdef SIGCHLD
|
|
|
830 static void
|
|
|
831 unix_init_process (void)
|
|
|
832 {
|
|
|
833 if (! noninteractive || initialized)
|
|
613
|
834 EMACS_SIGNAL (SIGCHLD, sigchld_handler);
|
|
428
|
835 }
|
|
|
836 #endif /* SIGCHLD */
|
|
|
837
|
|
|
838 /*
|
|
|
839 * Initialize any process local data. This is called when newly
|
|
|
840 * created process is connected to real OS file handles. The
|
|
|
841 * handles are generally represented by void* type, but are
|
|
442
|
842 * of type int (file descriptors) for UNIX.
|
|
428
|
843 */
|
|
|
844
|
|
|
845 static void
|
|
2286
|
846 unix_init_process_io_handles (Lisp_Process *p, void *in, void *UNUSED (out),
|
|
|
847 void *err, int UNUSED (flags))
|
|
853
|
848 {
|
|
|
849 UNIX_DATA(p)->infd = (int) in;
|
|
|
850 UNIX_DATA(p)->errfd = (int) err;
|
|
|
851 }
|
|
|
852
|
|
|
853 /* Move the file descriptor FD so that its number is not less than MIN. *
|
|
|
854 The original file descriptor remains open. */
|
|
|
855 static int
|
|
|
856 relocate_fd (int fd, int min)
|
|
|
857 {
|
|
|
858 if (fd >= min)
|
|
|
859 return fd;
|
|
|
860 else
|
|
|
861 {
|
|
|
862 int newfd = dup (fd);
|
|
|
863 if (newfd == -1)
|
|
|
864 {
|
|
867
|
865 Ibyte *errmess;
|
|
853
|
866 GET_STRERROR (errmess, errno);
|
|
|
867 stderr_out ("Error while setting up child: %s\n", errmess);
|
|
|
868 _exit (1);
|
|
|
869 }
|
|
|
870 return relocate_fd (newfd, min);
|
|
|
871 }
|
|
|
872 }
|
|
|
873
|
|
|
874 /* This is the last thing run in a newly forked inferior process.
|
|
|
875 Copy descriptors IN, OUT and ERR
|
|
|
876 as descriptors STDIN_FILENO, STDOUT_FILENO, and STDERR_FILENO.
|
|
|
877 Initialize inferior's priority, pgrp, connected dir and environment.
|
|
|
878 then exec another program based on new_argv.
|
|
|
879
|
|
|
880 XEmacs: We've removed the SET_PGRP argument because it's already
|
|
|
881 done by the callers of child_setup.
|
|
|
882
|
|
|
883 CURRENT_DIR is an elisp string giving the path of the current
|
|
|
884 directory the subprocess should have. Since we can't really signal
|
|
|
885 a decent error from within the child (#### not quite correct in
|
|
|
886 XEmacs?), this should be verified as an executable directory by the
|
|
|
887 parent. */
|
|
|
888
|
|
2268
|
889 static DECLARE_DOESNT_RETURN (child_setup (int, int, int, Ibyte **,
|
|
|
890 Lisp_Object));
|
|
|
891
|
|
|
892 static DOESNT_RETURN
|
|
867
|
893 child_setup (int in, int out, int err, Ibyte **new_argv,
|
|
853
|
894 Lisp_Object current_dir)
|
|
428
|
895 {
|
|
867
|
896 Ibyte **env;
|
|
|
897 Ibyte *pwd;
|
|
853
|
898
|
|
|
899 #ifdef SET_EMACS_PRIORITY
|
|
|
900 if (emacs_priority != 0)
|
|
|
901 nice (- emacs_priority);
|
|
|
902 #endif
|
|
|
903
|
|
|
904 #if !defined (NO_SUBPROCESSES)
|
|
|
905 /* Close Emacs's descriptors that this process should not have. */
|
|
|
906 close_process_descs ();
|
|
|
907 #endif /* not NO_SUBPROCESSES */
|
|
|
908 close_load_descs ();
|
|
|
909
|
|
|
910 /* [[Note that use of alloca is always safe here. It's obvious for systems
|
|
|
911 that do not have true vfork or that have true (stack) alloca.
|
|
|
912 If using vfork and C_ALLOCA it is safe because that changes
|
|
|
913 the superior's static variables as if the superior had done alloca
|
|
|
914 and will be cleaned up in the usual way.]] -- irrelevant because
|
|
|
915 XEmacs does not use vfork. */
|
|
|
916 {
|
|
|
917 REGISTER Bytecount i;
|
|
|
918
|
|
|
919 i = XSTRING_LENGTH (current_dir);
|
|
2367
|
920 pwd = alloca_ibytes (i + 6);
|
|
853
|
921 memcpy (pwd, "PWD=", 4);
|
|
|
922 memcpy (pwd + 4, XSTRING_DATA (current_dir), i);
|
|
|
923 i += 4;
|
|
|
924 if (!IS_DIRECTORY_SEP (pwd[i - 1]))
|
|
|
925 pwd[i++] = DIRECTORY_SEP;
|
|
|
926 pwd[i] = 0;
|
|
|
927
|
|
|
928 /* [[We can't signal an Elisp error here; we're in a vfork. Since
|
|
|
929 the callers check the current directory before forking, this
|
|
|
930 should only return an error if the directory's permissions
|
|
|
931 are changed between the check and this chdir, but we should
|
|
|
932 at least check.]] -- irrelevant because XEmacs does not use vfork. */
|
|
|
933 if (qxe_chdir (pwd + 4) < 0)
|
|
|
934 {
|
|
|
935 /* Don't report the chdir error, or ange-ftp.el doesn't work. */
|
|
|
936 /* (FSFmacs does _exit (errno) here.) */
|
|
|
937 pwd = 0;
|
|
|
938 }
|
|
|
939 else
|
|
|
940 {
|
|
|
941 /* Strip trailing "/". Cretinous *[]&@$#^%@#$% Un*x */
|
|
|
942 /* leave "//" (from FSF) */
|
|
|
943 while (i > 6 && IS_DIRECTORY_SEP (pwd[i - 1]))
|
|
|
944 pwd[--i] = 0;
|
|
|
945 }
|
|
|
946 }
|
|
|
947
|
|
|
948 /* Set `env' to a vector of the strings in Vprocess_environment. */
|
|
|
949 /* + 2 to include PWD and terminating 0. */
|
|
867
|
950 env = alloca_array (Ibyte *, XINT (Flength (Vprocess_environment)) + 2);
|
|
853
|
951 {
|
|
|
952 REGISTER Lisp_Object tail;
|
|
867
|
953 Ibyte **new_env = env;
|
|
853
|
954
|
|
|
955 /* If we have a PWD envvar and we know the real current directory,
|
|
|
956 pass one down, but with corrected value. */
|
|
|
957 if (pwd && egetenv ("PWD"))
|
|
|
958 *new_env++ = pwd;
|
|
|
959
|
|
|
960 /* Copy the Vprocess_environment strings into new_env. */
|
|
|
961 for (tail = Vprocess_environment;
|
|
|
962 CONSP (tail) && STRINGP (XCAR (tail));
|
|
|
963 tail = XCDR (tail))
|
|
|
964 {
|
|
867
|
965 Ibyte **ep = env;
|
|
|
966 Ibyte *envvar = XSTRING_DATA (XCAR (tail));
|
|
853
|
967
|
|
|
968 /* See if envvar duplicates any string already in the env.
|
|
|
969 If so, don't put it in.
|
|
|
970 When an env var has multiple definitions,
|
|
|
971 we keep the definition that comes first in process-environment. */
|
|
|
972 for (; ep != new_env; ep++)
|
|
|
973 {
|
|
867
|
974 Ibyte *p = *ep, *q = envvar;
|
|
853
|
975 while (1)
|
|
|
976 {
|
|
|
977 if (*q == 0)
|
|
|
978 /* The string is malformed; might as well drop it. */
|
|
|
979 goto duplicate;
|
|
|
980 if (*q != *p)
|
|
|
981 break;
|
|
|
982 if (*q == '=')
|
|
|
983 goto duplicate;
|
|
|
984 p++, q++;
|
|
|
985 }
|
|
|
986 }
|
|
867
|
987 if (pwd && !qxestrncmp ((Ibyte *) "PWD=", envvar, 4))
|
|
853
|
988 {
|
|
|
989 *new_env++ = pwd;
|
|
|
990 pwd = 0;
|
|
|
991 }
|
|
|
992 else
|
|
|
993 *new_env++ = envvar;
|
|
|
994
|
|
|
995 duplicate: ;
|
|
|
996 }
|
|
|
997
|
|
|
998 *new_env = 0;
|
|
|
999 }
|
|
|
1000
|
|
|
1001 /* Make sure that in, out, and err are not actually already in
|
|
|
1002 descriptors zero, one, or two; this could happen if Emacs is
|
|
|
1003 started with its standard in, out, or error closed, as might
|
|
|
1004 happen under X. */
|
|
|
1005 in = relocate_fd (in, 3);
|
|
|
1006 out = relocate_fd (out, 3);
|
|
|
1007 err = relocate_fd (err, 3);
|
|
|
1008
|
|
|
1009 /* Set the standard input/output channels of the new process. */
|
|
|
1010 retry_close (STDIN_FILENO);
|
|
|
1011 retry_close (STDOUT_FILENO);
|
|
|
1012 retry_close (STDERR_FILENO);
|
|
|
1013
|
|
|
1014 dup2 (in, STDIN_FILENO);
|
|
|
1015 dup2 (out, STDOUT_FILENO);
|
|
|
1016 dup2 (err, STDERR_FILENO);
|
|
|
1017
|
|
|
1018 retry_close (in);
|
|
|
1019 retry_close (out);
|
|
|
1020 retry_close (err);
|
|
|
1021
|
|
1015
|
1022 /* Close non-process-related file descriptors. It would be cleaner to
|
|
932
|
1023 close just the ones that need to be, but the following brute
|
|
1015
|
1024 force approach is certainly effective, and not too slow. */
|
|
932
|
1025
|
|
|
1026 {
|
|
|
1027 int fd;
|
|
1015
|
1028
|
|
|
1029 for (fd = 3; fd < MAXDESC; fd++)
|
|
932
|
1030 retry_close (fd);
|
|
|
1031 }
|
|
|
1032
|
|
853
|
1033 /* we've wrapped execve; it translates its arguments */
|
|
|
1034 qxe_execve (new_argv[0], new_argv, env);
|
|
|
1035
|
|
|
1036 stdout_out ("Can't exec program %s\n", new_argv[0]);
|
|
|
1037 _exit (1);
|
|
428
|
1038 }
|
|
|
1039
|
|
|
1040 /*
|
|
|
1041 * Fork off a subprocess. P is a pointer to a newly created subprocess
|
|
|
1042 * object. If this function signals, the caller is responsible for
|
|
|
1043 * deleting (and finalizing) the process object.
|
|
|
1044 *
|
|
|
1045 * The method must return PID of the new process, a (positive??? ####) number
|
|
|
1046 * which fits into Lisp_Int. No return value indicates an error, the method
|
|
|
1047 * must signal an error instead.
|
|
|
1048 */
|
|
|
1049
|
|
|
1050 static int
|
|
440
|
1051 unix_create_process (Lisp_Process *p,
|
|
428
|
1052 Lisp_Object *argv, int nargv,
|
|
853
|
1053 Lisp_Object program, Lisp_Object cur_dir,
|
|
|
1054 int separate_err)
|
|
428
|
1055 {
|
|
|
1056 int pid;
|
|
|
1057 int inchannel = -1;
|
|
|
1058 int outchannel = -1;
|
|
853
|
1059 int errchannel = -1;
|
|
428
|
1060 /* Use volatile to protect variables from being clobbered by longjmp. */
|
|
|
1061 volatile int forkin = -1;
|
|
|
1062 volatile int forkout = -1;
|
|
853
|
1063 volatile int forkerr = -1;
|
|
428
|
1064 volatile int pty_flag = 0;
|
|
|
1065
|
|
|
1066 if (!NILP (Vprocess_connection_type))
|
|
|
1067 {
|
|
|
1068 /* find a new pty, open the master side, return the opened
|
|
|
1069 file handle, and store the name of the corresponding slave
|
|
|
1070 side in global variable pty_name. */
|
|
|
1071 outchannel = inchannel = allocate_pty ();
|
|
|
1072 }
|
|
|
1073
|
|
535
|
1074 if (inchannel >= 0) /* We successfully allocated a pty. */
|
|
428
|
1075 {
|
|
|
1076 /* You're "supposed" to now open the slave in the child.
|
|
|
1077 On some systems, we can open it here; this allows for
|
|
|
1078 better error checking. */
|
|
|
1079 #if !defined(USG)
|
|
|
1080 /* On USG systems it does not work to open the pty's tty here
|
|
|
1081 and then close and reopen it in the child. */
|
|
853
|
1082 # ifdef O_NOCTTY
|
|
428
|
1083 /* Don't let this terminal become our controlling terminal
|
|
|
1084 (in case we don't have one). */
|
|
771
|
1085 forkout = forkin = qxe_open (pty_name,
|
|
|
1086 O_RDWR | O_NOCTTY | OPEN_BINARY, 0);
|
|
853
|
1087 # else
|
|
771
|
1088 forkout = forkin = qxe_open (pty_name, O_RDWR | OPEN_BINARY, 0);
|
|
853
|
1089 # endif
|
|
428
|
1090 if (forkin < 0)
|
|
|
1091 goto io_failure;
|
|
|
1092 #endif /* not USG */
|
|
853
|
1093 UNIX_DATA (p)->pty_flag = pty_flag = 1;
|
|
428
|
1094 }
|
|
|
1095 else
|
|
|
1096 if (create_bidirectional_pipe (&inchannel, &outchannel,
|
|
|
1097 &forkin, &forkout) < 0)
|
|
|
1098 goto io_failure;
|
|
|
1099
|
|
853
|
1100 if (separate_err)
|
|
|
1101 {
|
|
|
1102 int sv[2];
|
|
854
|
1103
|
|
853
|
1104 if (pipe (sv) < 0)
|
|
|
1105 goto io_failure;
|
|
|
1106 forkerr = sv[1];
|
|
|
1107 errchannel = sv[0];
|
|
|
1108 }
|
|
854
|
1109
|
|
428
|
1110 #if 0
|
|
|
1111 /* Replaced by close_process_descs */
|
|
|
1112 set_exclusive_use (inchannel);
|
|
|
1113 set_exclusive_use (outchannel);
|
|
|
1114 #endif
|
|
|
1115
|
|
|
1116 set_descriptor_non_blocking (inchannel);
|
|
1192
|
1117 set_descriptor_non_blocking (outchannel);
|
|
853
|
1118 if (errchannel >= 0)
|
|
|
1119 set_descriptor_non_blocking (errchannel);
|
|
428
|
1120
|
|
|
1121 /* Record this as an active process, with its channels.
|
|
|
1122 As a result, child_setup will close Emacs's side of the pipes. */
|
|
853
|
1123 init_process_io_handles (p, (void *) inchannel, (void *) outchannel,
|
|
|
1124 (void *) errchannel,
|
|
428
|
1125 pty_flag ? STREAM_PTY_FLUSHING : 0);
|
|
|
1126 /* Record the tty descriptor used in the subprocess. */
|
|
853
|
1127 UNIX_DATA (p)->subtty = forkin;
|
|
428
|
1128
|
|
|
1129 {
|
|
|
1130 pid = fork ();
|
|
|
1131 if (pid == 0)
|
|
|
1132 {
|
|
|
1133 /**** Now we're in the child process ****/
|
|
|
1134 int xforkin = forkin;
|
|
|
1135 int xforkout = forkout;
|
|
853
|
1136 int xforkerr = forkerr;
|
|
428
|
1137
|
|
1015
|
1138 /* Checking for quit in the child is bad because that will
|
|
|
1139 cause I/O, and that, in turn, can confuse the X connection. */
|
|
|
1140 begin_dont_check_for_quit();
|
|
|
1141
|
|
442
|
1142 /* Disconnect the current controlling terminal, pursuant to
|
|
|
1143 making the pty be the controlling terminal of the process.
|
|
|
1144 Also put us in our own process group. */
|
|
|
1145
|
|
|
1146 disconnect_controlling_terminal ();
|
|
|
1147
|
|
|
1148 if (pty_flag)
|
|
428
|
1149 {
|
|
|
1150 /* Open the pty connection and make the pty's terminal
|
|
|
1151 our controlling terminal.
|
|
|
1152
|
|
|
1153 On systems with TIOCSCTTY, we just use it to set
|
|
|
1154 the controlling terminal. On other systems, the
|
|
|
1155 first TTY we open becomes the controlling terminal.
|
|
|
1156 So, we end up with four possibilities:
|
|
|
1157
|
|
|
1158 (1) on USG and TIOCSCTTY systems, we open the pty
|
|
|
1159 and use TIOCSCTTY.
|
|
|
1160 (2) on other USG systems, we just open the pty.
|
|
|
1161 (3) on non-USG systems with TIOCSCTTY, we
|
|
|
1162 just use TIOCSCTTY. (On non-USG systems, we
|
|
|
1163 already opened the pty in the parent process.)
|
|
|
1164 (4) on non-USG systems without TIOCSCTTY, we
|
|
|
1165 close the pty and reopen it.
|
|
|
1166
|
|
|
1167 This would be cleaner if we didn't open the pty
|
|
|
1168 in the parent process, but doing it that way
|
|
|
1169 makes it possible to trap error conditions.
|
|
|
1170 It's harder to convey an error from the child
|
|
|
1171 process, and I don't feel like messing with
|
|
|
1172 this now. */
|
|
|
1173
|
|
|
1174 /* There was some weirdo, probably wrong,
|
|
|
1175 conditionalization on RTU and UNIPLUS here.
|
|
|
1176 I deleted it. So sue me. */
|
|
|
1177
|
|
|
1178 /* SunOS has TIOCSCTTY but the close/open method
|
|
|
1179 also works. */
|
|
|
1180
|
|
853
|
1181 #if defined (USG) || !defined (TIOCSCTTY)
|
|
428
|
1182 /* Now close the pty (if we had it open) and reopen it.
|
|
|
1183 This makes the pty the controlling terminal of the
|
|
|
1184 subprocess. */
|
|
853
|
1185 /* I wonder if retry_close (qxe_open (pty_name, ...)) would
|
|
|
1186 work? */
|
|
428
|
1187 if (xforkin >= 0)
|
|
771
|
1188 retry_close (xforkin);
|
|
|
1189 xforkout = xforkin = qxe_open (pty_name, O_RDWR | OPEN_BINARY, 0);
|
|
428
|
1190 if (xforkin < 0)
|
|
|
1191 {
|
|
771
|
1192 retry_write (1, "Couldn't open the pty terminal ", 31);
|
|
|
1193 retry_write (1, pty_name, qxestrlen (pty_name));
|
|
|
1194 retry_write (1, "\n", 1);
|
|
428
|
1195 _exit (1);
|
|
|
1196 }
|
|
853
|
1197 #endif /* USG or not TIOCSCTTY */
|
|
428
|
1198
|
|
|
1199 /* Miscellaneous setup required for some systems.
|
|
|
1200 Must be done before using tc* functions on xforkin.
|
|
|
1201 This guarantees that isatty(xforkin) is true. */
|
|
|
1202
|
|
853
|
1203 #if defined (HAVE_ISASTREAM) && defined (I_PUSH)
|
|
442
|
1204 if (isastream (xforkin))
|
|
|
1205 {
|
|
853
|
1206 # if defined (I_FIND)
|
|
|
1207 # define stream_module_pushed(fd, module) (ioctl (fd, I_FIND, module) == 1)
|
|
|
1208 # else
|
|
|
1209 # define stream_module_pushed(fd, module) 0
|
|
|
1210 # endif
|
|
442
|
1211 if (! stream_module_pushed (xforkin, "ptem"))
|
|
|
1212 ioctl (xforkin, I_PUSH, "ptem");
|
|
|
1213 if (! stream_module_pushed (xforkin, "ldterm"))
|
|
|
1214 ioctl (xforkin, I_PUSH, "ldterm");
|
|
|
1215 if (! stream_module_pushed (xforkin, "ttcompat"))
|
|
|
1216 ioctl (xforkin, I_PUSH, "ttcompat");
|
|
|
1217 }
|
|
853
|
1218 #endif /* defined (HAVE_ISASTREAM) && defined (I_PUSH) */
|
|
428
|
1219
|
|
853
|
1220 #ifdef TIOCSCTTY
|
|
428
|
1221 /* We ignore the return value
|
|
|
1222 because faith@cs.unc.edu says that is necessary on Linux. */
|
|
|
1223 assert (isatty (xforkin));
|
|
|
1224 ioctl (xforkin, TIOCSCTTY, 0);
|
|
853
|
1225 #endif /* TIOCSCTTY */
|
|
428
|
1226
|
|
|
1227 /* Change the line discipline. */
|
|
|
1228
|
|
853
|
1229 #if defined (HAVE_TERMIOS) && defined (LDISC1)
|
|
428
|
1230 {
|
|
|
1231 struct termios t;
|
|
|
1232 assert (isatty (xforkin));
|
|
|
1233 tcgetattr (xforkin, &t);
|
|
|
1234 t.c_lflag = LDISC1;
|
|
|
1235 if (tcsetattr (xforkin, TCSANOW, &t) < 0)
|
|
|
1236 perror ("create_process/tcsetattr LDISC1 failed\n");
|
|
|
1237 }
|
|
853
|
1238 #elif defined (NTTYDISC) && defined (TIOCSETD)
|
|
428
|
1239 {
|
|
|
1240 /* Use new line discipline. TIOCSETD is accepted and
|
|
|
1241 ignored on Sys5.4 systems with ttcompat. */
|
|
|
1242 int ldisc = NTTYDISC;
|
|
|
1243 assert (isatty (xforkin));
|
|
|
1244 ioctl (xforkin, TIOCSETD, &ldisc);
|
|
|
1245 }
|
|
853
|
1246 #endif /* TIOCSETD & NTTYDISC */
|
|
428
|
1247
|
|
|
1248 /* Make our process group be the foreground group
|
|
|
1249 of our new controlling terminal. */
|
|
|
1250
|
|
|
1251 {
|
|
442
|
1252 pid_t piddly = EMACS_GET_PROCESS_GROUP ();
|
|
428
|
1253 EMACS_SET_TTY_PROCESS_GROUP (xforkin, &piddly);
|
|
|
1254 }
|
|
|
1255
|
|
|
1256 /* On AIX, we've disabled SIGHUP above once we start a
|
|
|
1257 child on a pty. Now reenable it in the child, so it
|
|
|
1258 will die when we want it to.
|
|
|
1259 JV: This needs to be done ALWAYS as we might have inherited
|
|
|
1260 a SIG_IGN handling from our parent (nohup) and we are in new
|
|
|
1261 process group.
|
|
|
1262 */
|
|
613
|
1263 EMACS_SIGNAL (SIGHUP, SIG_DFL);
|
|
428
|
1264
|
|
535
|
1265 /* Set up the terminal characteristics of the pty. */
|
|
|
1266 child_setup_tty (xforkout);
|
|
|
1267 } /* if (pty_flag) */
|
|
428
|
1268
|
|
|
1269
|
|
613
|
1270 EMACS_SIGNAL (SIGINT, SIG_DFL);
|
|
|
1271 EMACS_SIGNAL (SIGQUIT, SIG_DFL);
|
|
428
|
1272
|
|
|
1273 {
|
|
867
|
1274 Ibyte **new_argv = alloca_array (Ibyte *, nargv + 2);
|
|
428
|
1275 int i;
|
|
|
1276
|
|
|
1277 /* Nothing below here GCs so our string pointers shouldn't move. */
|
|
771
|
1278 new_argv[0] = XSTRING_DATA (program);
|
|
428
|
1279 for (i = 0; i < nargv; i++)
|
|
|
1280 {
|
|
|
1281 CHECK_STRING (argv[i]);
|
|
771
|
1282 new_argv[i + 1] = XSTRING_DATA (argv[i]);
|
|
428
|
1283 }
|
|
|
1284 new_argv[i + 1] = 0;
|
|
|
1285
|
|
853
|
1286 child_setup (xforkin, xforkout, separate_err ? xforkerr : xforkout,
|
|
|
1287 new_argv, cur_dir);
|
|
428
|
1288 }
|
|
|
1289
|
|
|
1290 } /**** End of child code ****/
|
|
|
1291
|
|
|
1292 /**** Back in parent process ****/
|
|
|
1293 }
|
|
|
1294
|
|
|
1295 if (pid < 0)
|
|
|
1296 {
|
|
853
|
1297 /* Note: The caller set up an unwind-protect to automatically delete
|
|
|
1298 the process if we fail. This will correctly deselect and close
|
|
|
1299 inchannel, outchannel, and errchannel. */
|
|
442
|
1300 int save_errno = errno;
|
|
428
|
1301 close_descriptor_pair (forkin, forkout);
|
|
853
|
1302 if (separate_err)
|
|
|
1303 retry_close (forkerr);
|
|
442
|
1304 errno = save_errno;
|
|
563
|
1305 report_process_error ("Doing fork", Qunbound);
|
|
428
|
1306 }
|
|
|
1307
|
|
|
1308 /* #### dmoore - why is this commented out, otherwise we leave
|
|
|
1309 subtty = forkin, but then we close forkin just below. */
|
|
853
|
1310 /* UNIX_DATA (p)->subtty = -1; */
|
|
428
|
1311
|
|
|
1312 /* If the subfork execv fails, and it exits,
|
|
|
1313 this close hangs. I don't know why.
|
|
|
1314 So have an interrupt jar it loose. */
|
|
|
1315 if (forkin >= 0)
|
|
|
1316 close_safely (forkin);
|
|
|
1317 if (forkin != forkout && forkout >= 0)
|
|
771
|
1318 retry_close (forkout);
|
|
853
|
1319 if (separate_err)
|
|
|
1320 retry_close (forkerr);
|
|
428
|
1321
|
|
1204
|
1322 p->tty_name = pty_flag ? build_intstring (pty_name) : Qnil;
|
|
428
|
1323
|
|
|
1324 /* Notice that SIGCHLD was not blocked. (This is not possible on
|
|
|
1325 some systems.) No biggie if SIGCHLD occurs right around the
|
|
|
1326 time that this call happens, because SIGCHLD() does not actually
|
|
|
1327 deselect the process (that doesn't occur until the next time
|
|
|
1328 we're waiting for an event, when status_notify() is called). */
|
|
|
1329 return pid;
|
|
|
1330
|
|
853
|
1331 io_failure:
|
|
428
|
1332 {
|
|
|
1333 int save_errno = errno;
|
|
|
1334 close_descriptor_pair (forkin, forkout);
|
|
|
1335 close_descriptor_pair (inchannel, outchannel);
|
|
853
|
1336 close_descriptor_pair (forkerr, errchannel);
|
|
428
|
1337 errno = save_errno;
|
|
563
|
1338 report_process_error ("Opening pty or pipe", Qunbound);
|
|
1204
|
1339 RETURN_NOT_REACHED (0);
|
|
428
|
1340 }
|
|
|
1341 }
|
|
|
1342
|
|
|
1343 /* Return nonzero if this process is a ToolTalk connection. */
|
|
|
1344
|
|
|
1345 static int
|
|
440
|
1346 unix_tooltalk_connection_p (Lisp_Process *p)
|
|
428
|
1347 {
|
|
853
|
1348 return UNIX_DATA (p)->connected_via_filedesc_p;
|
|
428
|
1349 }
|
|
|
1350
|
|
|
1351 /* This is called to set process' virtual terminal size */
|
|
|
1352
|
|
|
1353 static int
|
|
853
|
1354 unix_set_window_size (Lisp_Process *p, int cols, int rows)
|
|
428
|
1355 {
|
|
853
|
1356 return set_window_size (UNIX_DATA (p)->infd, cols, rows);
|
|
428
|
1357 }
|
|
|
1358
|
|
|
1359 /*
|
|
|
1360 * This method is called to update status fields of the process
|
|
|
1361 * structure. If the process has not existed, this method is
|
|
|
1362 * expected to do nothing.
|
|
|
1363 *
|
|
|
1364 * The method is called only for real child processes.
|
|
|
1365 */
|
|
|
1366
|
|
|
1367 #ifdef HAVE_WAITPID
|
|
|
1368 static void
|
|
853
|
1369 unix_update_status_if_terminated (Lisp_Process *p)
|
|
428
|
1370 {
|
|
|
1371 int w;
|
|
|
1372 #ifdef SIGCHLD
|
|
|
1373 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
1374 #endif
|
|
|
1375 if (waitpid (XINT (p->pid), &w, WNOHANG) == XINT (p->pid))
|
|
|
1376 {
|
|
|
1377 p->tick++;
|
|
|
1378 update_status_from_wait_code (p, &w);
|
|
|
1379 }
|
|
|
1380 #ifdef SIGCHLD
|
|
|
1381 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
1382 #endif
|
|
|
1383 }
|
|
|
1384 #endif
|
|
|
1385
|
|
|
1386 /*
|
|
|
1387 * Update status of all exited processes. Called when SIGCLD has signaled.
|
|
|
1388 */
|
|
|
1389
|
|
|
1390 #ifdef SIGCHLD
|
|
|
1391 static void
|
|
|
1392 unix_reap_exited_processes (void)
|
|
|
1393 {
|
|
|
1394 int i;
|
|
440
|
1395 Lisp_Process *p;
|
|
428
|
1396
|
|
|
1397 #ifndef OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR
|
|
|
1398 record_exited_processes (1);
|
|
|
1399 #endif
|
|
|
1400
|
|
|
1401 if (exited_processes_index <= 0)
|
|
|
1402 {
|
|
|
1403 return;
|
|
|
1404 }
|
|
|
1405
|
|
853
|
1406 #ifdef EMACS_BLOCK_SIGNAL
|
|
428
|
1407 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
1408 #endif
|
|
|
1409 for (i = 0; i < exited_processes_index; i++)
|
|
|
1410 {
|
|
|
1411 int pid = exited_processes[i];
|
|
|
1412 int w = exited_processes_status[i];
|
|
|
1413
|
|
|
1414 /* Find the process that signaled us, and record its status. */
|
|
|
1415
|
|
|
1416 p = 0;
|
|
|
1417 {
|
|
|
1418 Lisp_Object tail;
|
|
|
1419 LIST_LOOP (tail, Vprocess_list)
|
|
|
1420 {
|
|
|
1421 Lisp_Object proc = XCAR (tail);
|
|
|
1422 p = XPROCESS (proc);
|
|
|
1423 if (INTP (p->pid) && XINT (p->pid) == pid)
|
|
|
1424 break;
|
|
|
1425 p = 0;
|
|
|
1426 }
|
|
|
1427 }
|
|
|
1428
|
|
|
1429 if (p)
|
|
|
1430 {
|
|
|
1431 /* Change the status of the process that was found. */
|
|
|
1432 p->tick++;
|
|
|
1433 process_tick++;
|
|
|
1434 update_status_from_wait_code (p, &w);
|
|
|
1435
|
|
|
1436 /* If process has terminated, stop waiting for its output. */
|
|
|
1437 if (WIFSIGNALED (w) || WIFEXITED (w))
|
|
|
1438 {
|
|
853
|
1439 if (!NILP (p->pipe_instream))
|
|
428
|
1440 {
|
|
|
1441 /* We can't just call event_stream->unselect_process_cb (p)
|
|
|
1442 here, because that calls XtRemoveInput, which is not
|
|
|
1443 necessarily reentrant, so we can't call this at interrupt
|
|
|
1444 level.
|
|
|
1445 */
|
|
|
1446 }
|
|
|
1447 }
|
|
|
1448 }
|
|
853
|
1449 #ifdef NEED_SYNC_PROCESS_CODE
|
|
428
|
1450 else
|
|
|
1451 {
|
|
|
1452 /* There was no asynchronous process found for that id. Check
|
|
|
1453 if we have a synchronous process. Only set sync process status
|
|
|
1454 if there is one, so we work OK with the waitpid() call in
|
|
|
1455 wait_for_termination(). */
|
|
|
1456 if (synch_process_alive != 0)
|
|
|
1457 { /* Set the global sync process status variables. */
|
|
|
1458 synch_process_alive = 0;
|
|
|
1459
|
|
|
1460 /* Report the status of the synchronous process. */
|
|
|
1461 if (WIFEXITED (w))
|
|
|
1462 synch_process_retcode = WEXITSTATUS (w);
|
|
|
1463 else if (WIFSIGNALED (w))
|
|
|
1464 synch_process_death = signal_name (WTERMSIG (w));
|
|
|
1465 }
|
|
|
1466 }
|
|
853
|
1467 #endif /* NEED_SYNC_PROCESS_CODE */
|
|
428
|
1468 }
|
|
|
1469
|
|
|
1470 exited_processes_index = 0;
|
|
|
1471
|
|
|
1472 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
1473 }
|
|
|
1474 #endif /* SIGCHLD */
|
|
|
1475
|
|
|
1476 /*
|
|
|
1477 * Stuff the entire contents of LSTREAM to the process output pipe
|
|
|
1478 */
|
|
|
1479
|
|
|
1480 static JMP_BUF send_process_frame;
|
|
|
1481
|
|
|
1482 static SIGTYPE
|
|
|
1483 send_process_trap (int signum)
|
|
|
1484 {
|
|
|
1485 EMACS_REESTABLISH_SIGNAL (signum, send_process_trap);
|
|
|
1486 EMACS_UNBLOCK_SIGNAL (signum);
|
|
|
1487 LONGJMP (send_process_frame, 1);
|
|
|
1488 }
|
|
|
1489
|
|
|
1490 static void
|
|
853
|
1491 unix_send_process (Lisp_Object proc, struct lstream *lstream)
|
|
428
|
1492 {
|
|
1111
|
1493 /* See comment lisp.h circa line 787 */
|
|
|
1494 SIGTYPE (*VOLATILE_IF_NOT_CPP old_sigpipe) (int) = 0;
|
|
|
1495 VOLATILE_IF_NOT_CPP Lisp_Object vol_proc = proc;
|
|
|
1496 Lisp_Process *VOLATILE_IF_NOT_CPP p = XPROCESS (proc);
|
|
428
|
1497
|
|
442
|
1498 /* #### JV: layering violation?
|
|
|
1499
|
|
|
1500 This function knows too much about the relation between the encoding
|
|
|
1501 stream (DATA_OUTSTREAM) and the actual output stream p->output_stream.
|
|
|
1502
|
|
|
1503 If encoding streams properly forwarded all calls, we could simply
|
|
|
1504 use DATA_OUTSTREAM everywhere. */
|
|
|
1505
|
|
428
|
1506 if (!SETJMP (send_process_frame))
|
|
|
1507 {
|
|
|
1508 /* use a reasonable-sized buffer (somewhere around the size of the
|
|
|
1509 stream buffer) so as to avoid inundating the stream with blocked
|
|
|
1510 data. */
|
|
867
|
1511 Ibyte chunkbuf[512];
|
|
428
|
1512 Bytecount chunklen;
|
|
|
1513
|
|
|
1514 while (1)
|
|
|
1515 {
|
|
771
|
1516 int writeret;
|
|
428
|
1517
|
|
|
1518 chunklen = Lstream_read (lstream, chunkbuf, 512);
|
|
|
1519 if (chunklen <= 0)
|
|
2500
|
1520 break; /* perhaps should ABORT() if < 0?
|
|
428
|
1521 This should never happen. */
|
|
|
1522 old_sigpipe =
|
|
613
|
1523 (SIGTYPE (*) (int)) EMACS_SIGNAL (SIGPIPE, send_process_trap);
|
|
428
|
1524 /* Lstream_write() will never successfully write less than
|
|
|
1525 the amount sent in. In the worst case, it just buffers
|
|
|
1526 the unwritten data. */
|
|
800
|
1527 writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM (p)), chunkbuf,
|
|
428
|
1528 chunklen);
|
|
563
|
1529 {
|
|
|
1530 int save_errno = errno;
|
|
613
|
1531 EMACS_SIGNAL (SIGPIPE, old_sigpipe);
|
|
563
|
1532 errno = save_errno;
|
|
|
1533 if (writeret < 0)
|
|
|
1534 /* This is a real error. Blocking errors are handled
|
|
|
1535 specially inside of the filedesc stream. */
|
|
|
1536 report_process_error ("writing to process", proc);
|
|
|
1537 }
|
|
428
|
1538 while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
|
|
|
1539 {
|
|
|
1540 /* Buffer is full. Wait, accepting input;
|
|
|
1541 that may allow the program
|
|
|
1542 to finish doing output and read more. */
|
|
1111
|
1543 Faccept_process_output (Qnil, make_int (1), Qnil);
|
|
442
|
1544 /* It could have *really* finished, deleting the process */
|
|
|
1545 if (NILP(p->pipe_outstream))
|
|
|
1546 return;
|
|
428
|
1547 old_sigpipe =
|
|
613
|
1548 (SIGTYPE (*) (int)) EMACS_SIGNAL (SIGPIPE, send_process_trap);
|
|
428
|
1549 Lstream_flush (XLSTREAM (p->pipe_outstream));
|
|
613
|
1550 EMACS_SIGNAL (SIGPIPE, old_sigpipe);
|
|
428
|
1551 }
|
|
|
1552 }
|
|
|
1553 }
|
|
|
1554 else
|
|
|
1555 { /* We got here from a longjmp() from the SIGPIPE handler */
|
|
613
|
1556 EMACS_SIGNAL (SIGPIPE, old_sigpipe);
|
|
428
|
1557 /* Close the file lstream so we don't attempt to write to it further */
|
|
|
1558 /* #### There is controversy over whether this might cause fd leakage */
|
|
|
1559 /* my tests say no. -slb */
|
|
|
1560 XLSTREAM (p->pipe_outstream)->flags &= ~LSTREAM_FL_IS_OPEN;
|
|
898
|
1561 XLSTREAM (p->coding_outstream)->flags &= ~LSTREAM_FL_IS_OPEN;
|
|
428
|
1562 p->status_symbol = Qexit;
|
|
|
1563 p->exit_code = 256; /* #### SIGPIPE ??? */
|
|
|
1564 p->core_dumped = 0;
|
|
|
1565 p->tick++;
|
|
|
1566 process_tick++;
|
|
898
|
1567 deactivate_process (vol_proc);
|
|
442
|
1568 invalid_operation ("SIGPIPE raised on process; closed it", p->name);
|
|
428
|
1569 }
|
|
|
1570
|
|
613
|
1571 old_sigpipe = (SIGTYPE (*) (int)) EMACS_SIGNAL (SIGPIPE, send_process_trap);
|
|
800
|
1572 Lstream_flush (XLSTREAM (DATA_OUTSTREAM (p)));
|
|
613
|
1573 EMACS_SIGNAL (SIGPIPE, old_sigpipe);
|
|
428
|
1574 }
|
|
|
1575
|
|
|
1576 /*
|
|
|
1577 * Send EOF to the process. The default implementation simply
|
|
|
1578 * closes the output stream. The method must return 0 to call
|
|
|
1579 * the default implementation, or 1 if it has taken all care about
|
|
|
1580 * sending EOF to the process.
|
|
|
1581 */
|
|
|
1582
|
|
|
1583 static int
|
|
|
1584 unix_process_send_eof (Lisp_Object proc)
|
|
|
1585 {
|
|
|
1586 if (!UNIX_DATA (XPROCESS (proc))->pty_flag)
|
|
|
1587 return 0;
|
|
|
1588
|
|
|
1589 /* #### get_eof_char simply doesn't return the correct character
|
|
|
1590 here. Maybe it is needed to determine the right eof
|
|
|
1591 character in init_process_io_handles but here it simply screws
|
|
|
1592 things up. */
|
|
|
1593 #if 0
|
|
867
|
1594 Ibyte eof_char = get_eof_char (XPROCESS (proc));
|
|
428
|
1595 send_process (proc, Qnil, &eof_char, 0, 1);
|
|
|
1596 #else
|
|
867
|
1597 send_process (proc, Qnil, (const Ibyte *) "\004", 0, 1);
|
|
428
|
1598 #endif
|
|
|
1599 return 1;
|
|
|
1600 }
|
|
|
1601
|
|
|
1602 /*
|
|
|
1603 * Called before the process is deactivated. The process object
|
|
|
1604 * is not immediately finalized, just undergoes a transition to
|
|
|
1605 * inactive state.
|
|
|
1606 *
|
|
|
1607 * The return value is a unique stream ID, as returned by
|
|
853
|
1608 * event_stream_delete_io_streams
|
|
428
|
1609 *
|
|
853
|
1610 * In the lack of this method, only event_stream_delete_io_streams
|
|
428
|
1611 * is called on both I/O streams of the process.
|
|
|
1612 *
|
|
|
1613 * The UNIX version guards this by ignoring possible SIGPIPE.
|
|
|
1614 */
|
|
|
1615
|
|
853
|
1616 static void
|
|
|
1617 unix_deactivate_process (Lisp_Process *p,
|
|
|
1618 USID *in_usid,
|
|
|
1619 USID *err_usid)
|
|
428
|
1620 {
|
|
|
1621 SIGTYPE (*old_sigpipe) (int) = 0;
|
|
|
1622
|
|
2367
|
1623 if (UNIX_DATA (p)->infd >= 0)
|
|
|
1624 flush_pending_output (UNIX_DATA (p)->infd);
|
|
|
1625 if (UNIX_DATA (p)->errfd >= 0)
|
|
|
1626 flush_pending_output (UNIX_DATA (p)->errfd);
|
|
428
|
1627
|
|
|
1628 /* closing the outstream could result in SIGPIPE, so ignore it. */
|
|
613
|
1629 old_sigpipe = (SIGTYPE (*) (int)) EMACS_SIGNAL (SIGPIPE, SIG_IGN);
|
|
853
|
1630 event_stream_delete_io_streams (p->pipe_instream, p->pipe_outstream,
|
|
|
1631 p->pipe_errstream, in_usid, err_usid);
|
|
613
|
1632 EMACS_SIGNAL (SIGPIPE, old_sigpipe);
|
|
428
|
1633
|
|
2367
|
1634 UNIX_DATA (p)->infd = -1;
|
|
|
1635 UNIX_DATA (p)->errfd = -1;
|
|
428
|
1636 }
|
|
|
1637
|
|
442
|
1638 /* If the subtty field of the process data is not filled in, do so now. */
|
|
|
1639 static void
|
|
1204
|
1640 try_to_initialize_subtty (Lisp_Process *p)
|
|
442
|
1641 {
|
|
1204
|
1642 struct unix_process_data *upd = UNIX_DATA (p);
|
|
442
|
1643 if (upd->pty_flag
|
|
444
|
1644 && (upd->subtty == -1 || ! isatty (upd->subtty))
|
|
1204
|
1645 && STRINGP (p->tty_name))
|
|
|
1646 upd->subtty = qxe_open (XSTRING_DATA (p->tty_name), O_RDWR, 0);
|
|
442
|
1647 }
|
|
|
1648
|
|
|
1649 /* Send signal number SIGNO to PROCESS.
|
|
428
|
1650 CURRENT_GROUP means send to the process group that currently owns
|
|
|
1651 the terminal being used to communicate with PROCESS.
|
|
|
1652 This is used for various commands in shell mode.
|
|
|
1653 If NOMSG is zero, insert signal-announcements into process's buffers
|
|
|
1654 right away.
|
|
|
1655
|
|
|
1656 If we can, we try to signal PROCESS by sending control characters
|
|
|
1657 down the pty. This allows us to signal inferiors who have changed
|
|
442
|
1658 their uid, for which killpg would return an EPERM error,
|
|
|
1659 or processes running on other machines via remote login.
|
|
428
|
1660
|
|
442
|
1661 The method signals an error if the given SIGNO is not valid. */
|
|
428
|
1662
|
|
|
1663 static void
|
|
|
1664 unix_kill_child_process (Lisp_Object proc, int signo,
|
|
|
1665 int current_group, int nomsg)
|
|
|
1666 {
|
|
442
|
1667 pid_t pgid = -1;
|
|
440
|
1668 Lisp_Process *p = XPROCESS (proc);
|
|
442
|
1669 struct unix_process_data *d = UNIX_DATA (p);
|
|
428
|
1670
|
|
|
1671 switch (signo)
|
|
|
1672 {
|
|
|
1673 #ifdef SIGCONT
|
|
|
1674 case SIGCONT:
|
|
|
1675 p->status_symbol = Qrun;
|
|
|
1676 p->exit_code = 0;
|
|
|
1677 p->tick++;
|
|
|
1678 process_tick++;
|
|
|
1679 if (!nomsg)
|
|
|
1680 status_notify ();
|
|
|
1681 break;
|
|
|
1682 #endif /* ! defined (SIGCONT) */
|
|
|
1683 case SIGINT:
|
|
|
1684 case SIGQUIT:
|
|
|
1685 case SIGKILL:
|
|
442
|
1686 flush_pending_output (d->infd);
|
|
853
|
1687 flush_pending_output (d->errfd);
|
|
428
|
1688 break;
|
|
|
1689 }
|
|
|
1690
|
|
442
|
1691 if (! d->pty_flag)
|
|
|
1692 current_group = 0;
|
|
|
1693
|
|
|
1694 /* If current_group is true, we want to send a signal to the
|
|
|
1695 foreground process group of the terminal our child process is
|
|
|
1696 running on. You would think that would be easy.
|
|
|
1697
|
|
|
1698 The BSD people invented the TIOCPGRP ioctl to get the foreground
|
|
|
1699 process group of a tty. That, combined with killpg, gives us
|
|
|
1700 what we want.
|
|
|
1701
|
|
|
1702 However, the POSIX standards people, in their infinite wisdom,
|
|
|
1703 have seen fit to only allow this for processes which have the
|
|
|
1704 terminal as controlling terminal, which doesn't apply to us.
|
|
|
1705
|
|
|
1706 Sooo..., we have to do something non-standard. The ioctls
|
|
|
1707 TIOCSIGNAL, TIOCSIG, and TIOCSIGSEND send the signal directly on
|
|
|
1708 many systems. POSIX tcgetpgrp(), since it is *documented* as not
|
|
|
1709 doing what we want, is actually less likely to work than the BSD
|
|
|
1710 ioctl TIOCGPGRP it is supposed to obsolete. Sometimes we have to
|
|
|
1711 use TIOCGPGRP on the master end, sometimes the slave end
|
|
|
1712 (probably an AIX bug). So we better get a fd for the slave if we
|
|
444
|
1713 haven't got it yet.
|
|
|
1714
|
|
|
1715 Anal operating systems like SGI Irix and Compaq Tru64 adhere
|
|
|
1716 strictly to the letter of the law, so our hack doesn't work.
|
|
|
1717 The following fragment from an Irix header file is suggestive:
|
|
|
1718
|
|
|
1719 #ifdef __notdef__
|
|
|
1720 // this is not currently supported
|
|
|
1721 #define TIOCSIGNAL (tIOC|31) // pty: send signal to slave
|
|
|
1722 #endif
|
|
|
1723
|
|
|
1724 On those systems where none of our tricks work, we just fall back
|
|
|
1725 to the non-current_group behavior and kill the process group of
|
|
|
1726 the child.
|
|
|
1727 */
|
|
442
|
1728 if (current_group)
|
|
428
|
1729 {
|
|
1204
|
1730 try_to_initialize_subtty (p);
|
|
442
|
1731
|
|
|
1732 #ifdef SIGNALS_VIA_CHARACTERS
|
|
|
1733 /* If possible, send signals to the entire pgrp
|
|
|
1734 by sending an input character to it. */
|
|
|
1735 {
|
|
867
|
1736 Ibyte sigchar = process_signal_char (d->subtty, signo);
|
|
442
|
1737 if (sigchar)
|
|
|
1738 {
|
|
853
|
1739 send_process (proc, Qnil, &sigchar, 0, 1);
|
|
442
|
1740 return;
|
|
|
1741 }
|
|
|
1742 }
|
|
|
1743 #endif /* SIGNALS_VIA_CHARACTERS */
|
|
|
1744
|
|
|
1745 #ifdef TIOCGPGRP
|
|
|
1746 if (pgid == -1)
|
|
|
1747 ioctl (d->infd, TIOCGPGRP, &pgid); /* BSD */
|
|
|
1748 if (pgid == -1 && d->subtty != -1)
|
|
|
1749 ioctl (d->subtty, TIOCGPGRP, &pgid); /* Only this works on AIX! */
|
|
|
1750 #endif /* TIOCGPGRP */
|
|
|
1751
|
|
|
1752 if (pgid == -1)
|
|
428
|
1753 {
|
|
442
|
1754 /* Many systems provide an ioctl to send a signal directly */
|
|
|
1755 #ifdef TIOCSIGNAL /* Solaris, HP-UX */
|
|
|
1756 if (ioctl (d->infd, TIOCSIGNAL, signo) != -1)
|
|
|
1757 return;
|
|
|
1758 #endif /* TIOCSIGNAL */
|
|
|
1759
|
|
|
1760 #ifdef TIOCSIG /* BSD */
|
|
|
1761 if (ioctl (d->infd, TIOCSIG, signo) != -1)
|
|
|
1762 return;
|
|
|
1763 #endif /* TIOCSIG */
|
|
428
|
1764 }
|
|
442
|
1765 } /* current_group */
|
|
428
|
1766
|
|
442
|
1767 if (pgid == -1)
|
|
|
1768 /* Either current_group is 0, or we failed to get the foreground
|
|
|
1769 process group using the trickery above. So we fall back to
|
|
|
1770 sending the signal to the process group of our child process.
|
|
|
1771 Since this is often a shell that ignores signals like SIGINT,
|
|
|
1772 the shell's subprocess is killed, which is the desired effect.
|
|
|
1773 The process group of p->pid is always p->pid, since it was
|
|
|
1774 created as a process group leader. */
|
|
|
1775 pgid = XINT (p->pid);
|
|
|
1776
|
|
|
1777 /* Finally send the signal. */
|
|
|
1778 if (EMACS_KILLPG (pgid, signo) == -1)
|
|
458
|
1779 {
|
|
|
1780 /* It's not an error if our victim is already dead.
|
|
462
|
1781 And we can't rely on the result of killing a zombie, since
|
|
|
1782 XPG 4.2 requires that killing a zombie fail with ESRCH,
|
|
|
1783 while FIPS 151-2 requires that it succeeds! */
|
|
458
|
1784 #ifdef ESRCH
|
|
|
1785 if (errno != ESRCH)
|
|
|
1786 #endif
|
|
563
|
1787 signal_ferror_with_frob (Qio_error, lisp_strerror (errno),
|
|
|
1788 "kill (pgid=%ld, signo=%ld) failed",
|
|
|
1789 (long) pgid, (long) signo);
|
|
458
|
1790 }
|
|
428
|
1791 }
|
|
|
1792
|
|
442
|
1793 /* Send signal SIGCODE to any process in the system given its PID.
|
|
|
1794 Return zero if successful, a negative number upon failure. */
|
|
428
|
1795
|
|
|
1796 static int
|
|
|
1797 unix_kill_process_by_pid (int pid, int sigcode)
|
|
|
1798 {
|
|
|
1799 return kill (pid, sigcode);
|
|
|
1800 }
|
|
|
1801
|
|
442
|
1802 /* Canonicalize host name HOST, and return its canonical form.
|
|
|
1803 The default implementation just takes HOST for a canonical name. */
|
|
428
|
1804
|
|
|
1805 #ifdef HAVE_SOCKETS
|
|
|
1806 static Lisp_Object
|
|
|
1807 unix_canonicalize_host_name (Lisp_Object host)
|
|
|
1808 {
|
|
502
|
1809 #ifdef USE_GETADDRINFO
|
|
440
|
1810 struct addrinfo hints, *res;
|
|
|
1811 static char addrbuf[NI_MAXHOST];
|
|
|
1812 Lisp_Object canonname;
|
|
|
1813 int retval;
|
|
|
1814 char *ext_host;
|
|
|
1815
|
|
|
1816 xzero (hints);
|
|
|
1817 hints.ai_flags = AI_CANONNAME;
|
|
724
|
1818 #ifdef IPV6_CANONICALIZE
|
|
440
|
1819 hints.ai_family = AF_UNSPEC;
|
|
724
|
1820 #else
|
|
|
1821 hints.ai_family = PF_INET;
|
|
|
1822 #endif
|
|
440
|
1823 hints.ai_socktype = SOCK_STREAM;
|
|
|
1824 hints.ai_protocol = 0;
|
|
442
|
1825 LISP_STRING_TO_EXTERNAL (host, ext_host, Qnative);
|
|
440
|
1826 retval = getaddrinfo (ext_host, NULL, &hints, &res);
|
|
|
1827 if (retval != 0)
|
|
|
1828 {
|
|
867
|
1829 CIbyte *gai_err;
|
|
440
|
1830
|
|
855
|
1831 EXTERNAL_TO_C_STRING (gai_strerror (retval), gai_err,
|
|
771
|
1832 Qstrerror_encoding);
|
|
855
|
1833 maybe_signal_error (Qio_error, gai_err, host,
|
|
793
|
1834 Qprocess, ERROR_ME_DEBUG_WARN);
|
|
440
|
1835 canonname = host;
|
|
|
1836 }
|
|
|
1837 else
|
|
|
1838 {
|
|
|
1839 int gni = getnameinfo (res->ai_addr, res->ai_addrlen,
|
|
|
1840 addrbuf, sizeof(addrbuf),
|
|
|
1841 NULL, 0, NI_NUMERICHOST);
|
|
|
1842 canonname = gni ? host : build_ext_string (addrbuf, Qnative);
|
|
|
1843
|
|
|
1844 freeaddrinfo (res);
|
|
|
1845 }
|
|
|
1846
|
|
|
1847 return canonname;
|
|
502
|
1848 #else /* ! USE_GETADDRINFO */
|
|
428
|
1849 struct sockaddr_in address;
|
|
|
1850
|
|
|
1851 if (!get_internet_address (host, &address, ERROR_ME_NOT))
|
|
|
1852 return host;
|
|
|
1853
|
|
|
1854 if (address.sin_family == AF_INET)
|
|
|
1855 return build_string (inet_ntoa (address.sin_addr));
|
|
|
1856 else
|
|
|
1857 /* #### any clue what to do here? */
|
|
|
1858 return host;
|
|
502
|
1859 #endif /* ! USE_GETADDRINFO */
|
|
428
|
1860 }
|
|
|
1861
|
|
442
|
1862 /* Open a TCP network connection to a given HOST/SERVICE.
|
|
|
1863 Treated exactly like a normal process when reading and writing.
|
|
|
1864 Only differences are in status display and process deletion.
|
|
|
1865 A network connection has no PID; you cannot signal it. All you can
|
|
|
1866 do is deactivate and close it via delete-process. */
|
|
428
|
1867
|
|
|
1868 static void
|
|
502
|
1869 unix_open_network_stream (Lisp_Object name, Lisp_Object host,
|
|
|
1870 Lisp_Object service, Lisp_Object protocol,
|
|
|
1871 void **vinfd, void **voutfd)
|
|
428
|
1872 {
|
|
|
1873 int inch;
|
|
|
1874 int outch;
|
|
502
|
1875 volatile int s = -1;
|
|
428
|
1876 volatile int port;
|
|
|
1877 volatile int retry = 0;
|
|
502
|
1878 volatile int xerrno = 0;
|
|
|
1879 volatile int failed_connect = 0;
|
|
428
|
1880 int retval;
|
|
|
1881
|
|
|
1882 CHECK_STRING (host);
|
|
|
1883
|
|
|
1884 if (!EQ (protocol, Qtcp) && !EQ (protocol, Qudp))
|
|
563
|
1885 invalid_constant ("Unsupported protocol", protocol);
|
|
428
|
1886
|
|
440
|
1887 {
|
|
502
|
1888 #ifdef USE_GETADDRINFO
|
|
|
1889
|
|
440
|
1890 struct addrinfo hints, *res;
|
|
|
1891 struct addrinfo * volatile lres;
|
|
771
|
1892 Extbyte *portstring;
|
|
|
1893 Extbyte *ext_host;
|
|
|
1894 Extbyte portbuf[128];
|
|
440
|
1895 /*
|
|
|
1896 * Caution: service can either be a string or int.
|
|
|
1897 * Convert to a C string for later use by getaddrinfo.
|
|
|
1898 */
|
|
|
1899 if (INTP (service))
|
|
|
1900 {
|
|
|
1901 snprintf (portbuf, sizeof (portbuf), "%ld", (long) XINT (service));
|
|
|
1902 portstring = portbuf;
|
|
|
1903 port = htons ((unsigned short) XINT (service));
|
|
|
1904 }
|
|
|
1905 else
|
|
|
1906 {
|
|
|
1907 CHECK_STRING (service);
|
|
771
|
1908 LISP_STRING_TO_EXTERNAL (service, portstring,
|
|
|
1909 Qunix_service_name_encoding);
|
|
440
|
1910 port = 0;
|
|
|
1911 }
|
|
|
1912
|
|
|
1913 xzero (hints);
|
|
|
1914 hints.ai_flags = 0;
|
|
|
1915 hints.ai_family = AF_UNSPEC;
|
|
|
1916 if (EQ (protocol, Qtcp))
|
|
|
1917 hints.ai_socktype = SOCK_STREAM;
|
|
|
1918 else /* EQ (protocol, Qudp) */
|
|
|
1919 hints.ai_socktype = SOCK_DGRAM;
|
|
|
1920 hints.ai_protocol = 0;
|
|
771
|
1921 LISP_STRING_TO_EXTERNAL (host, ext_host, Qunix_host_name_encoding);
|
|
440
|
1922 retval = getaddrinfo (ext_host, portstring, &hints, &res);
|
|
|
1923 if (retval != 0)
|
|
|
1924 {
|
|
867
|
1925 CIbyte *gai_err;
|
|
440
|
1926
|
|
855
|
1927 EXTERNAL_TO_C_STRING (gai_strerror (retval), gai_err,
|
|
771
|
1928 Qstrerror_encoding);
|
|
855
|
1929 signal_error (Qio_error, gai_err, list2 (host, service));
|
|
440
|
1930 }
|
|
|
1931
|
|
|
1932 /* address loop */
|
|
|
1933 for (lres = res; lres ; lres = lres->ai_next)
|
|
|
1934
|
|
502
|
1935 #else /* !USE_GETADDRINFO */
|
|
440
|
1936
|
|
|
1937 struct sockaddr_in address;
|
|
502
|
1938 volatile int i;
|
|
440
|
1939
|
|
|
1940 if (INTP (service))
|
|
|
1941 port = htons ((unsigned short) XINT (service));
|
|
|
1942 else
|
|
|
1943 {
|
|
|
1944 struct servent *svc_info;
|
|
771
|
1945 Extbyte *servext;
|
|
|
1946
|
|
440
|
1947 CHECK_STRING (service);
|
|
771
|
1948 LISP_STRING_TO_EXTERNAL (service, servext,
|
|
|
1949 Qunix_service_name_encoding);
|
|
440
|
1950
|
|
|
1951 if (EQ (protocol, Qtcp))
|
|
771
|
1952 svc_info = getservbyname (servext, "tcp");
|
|
440
|
1953 else /* EQ (protocol, Qudp) */
|
|
771
|
1954 svc_info = getservbyname (servext, "udp");
|
|
428
|
1955
|
|
440
|
1956 if (svc_info == 0)
|
|
442
|
1957 invalid_argument ("Unknown service", service);
|
|
440
|
1958 port = svc_info->s_port;
|
|
|
1959 }
|
|
428
|
1960
|
|
440
|
1961 get_internet_address (host, &address, ERROR_ME);
|
|
|
1962 address.sin_port = port;
|
|
428
|
1963
|
|
502
|
1964 /* use a trivial address loop */
|
|
|
1965 for (i = 0; i < 1; i++)
|
|
|
1966
|
|
|
1967 #endif /* !USE_GETADDRINFO */
|
|
|
1968 {
|
|
|
1969 #ifdef USE_GETADDRINFO
|
|
|
1970 int family = lres->ai_family;
|
|
|
1971 #else
|
|
|
1972 int family = address.sin_family;
|
|
|
1973 #endif
|
|
|
1974
|
|
|
1975 if (EQ (protocol, Qtcp))
|
|
|
1976 s = socket (family, SOCK_STREAM, 0);
|
|
|
1977 else /* EQ (protocol, Qudp) */
|
|
|
1978 s = socket (family, SOCK_DGRAM, 0);
|
|
|
1979
|
|
|
1980 if (s < 0)
|
|
|
1981 {
|
|
|
1982 xerrno = errno;
|
|
|
1983 failed_connect = 0;
|
|
|
1984 continue;
|
|
|
1985 }
|
|
|
1986
|
|
|
1987 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1988 /* Slow down polling. Some kernels have a bug which causes retrying
|
|
|
1989 connect to fail after a connect. (Note that the entire purpose
|
|
|
1990 for this code is a very old comment concerning an Ultrix bug that
|
|
|
1991 requires this code. We used to do this ALWAYS despite this!
|
|
|
1992 This messes up C-g out of connect() in a big way. So instead we
|
|
|
1993 just assume that anyone who sees such a kernel bug will define
|
|
|
1994 this constant, which for now is only defined under Ultrix.) --ben
|
|
|
1995 */
|
|
|
1996 slow_down_interrupts ();
|
|
|
1997 #endif
|
|
|
1998
|
|
|
1999 loop:
|
|
|
2000
|
|
|
2001 /* A system call interrupted with a SIGALRM or SIGIO comes back
|
|
|
2002 here, with can_break_system_calls reset to 0. */
|
|
|
2003 SETJMP (break_system_call_jump);
|
|
|
2004 if (QUITP)
|
|
|
2005 {
|
|
|
2006 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
2007 speed_up_interrupts ();
|
|
|
2008 #endif
|
|
853
|
2009 QUIT;
|
|
502
|
2010 /* In case something really weird happens ... */
|
|
|
2011 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
2012 slow_down_interrupts ();
|
|
|
2013 #endif
|
|
|
2014 }
|
|
|
2015
|
|
|
2016 /* Break out of connect with a signal (it isn't otherwise possible).
|
|
|
2017 Thus you don't get screwed with a hung network. */
|
|
|
2018 can_break_system_calls = 1;
|
|
|
2019
|
|
|
2020 #ifdef USE_GETADDRINFO
|
|
|
2021 retval = connect (s, lres->ai_addr, lres->ai_addrlen);
|
|
|
2022 #else
|
|
|
2023 retval = connect (s, (struct sockaddr *) &address, sizeof (address));
|
|
|
2024 #endif
|
|
|
2025 can_break_system_calls = 0;
|
|
|
2026 if (retval == -1 && errno != EISCONN)
|
|
|
2027 {
|
|
|
2028 xerrno = errno;
|
|
859
|
2029
|
|
|
2030 if (errno == EINTR || errno == EINPROGRESS || errno == EALREADY)
|
|
502
|
2031 goto loop;
|
|
|
2032 if (errno == EADDRINUSE && retry < 20)
|
|
|
2033 {
|
|
|
2034 #ifdef __FreeBSD__
|
|
|
2035 /* A delay here is needed on some FreeBSD systems,
|
|
|
2036 and it is harmless, since this retrying takes
|
|
|
2037 time anyway and should be infrequent.
|
|
|
2038 `sleep-for' allowed for quitting this loop with
|
|
|
2039 interrupts slowed down so it can't be used
|
|
|
2040 here. Async timers should already be disabled
|
|
|
2041 at this point so we can use `sleep'.
|
|
|
2042
|
|
|
2043 (Again, this was not conditionalized on FreeBSD.
|
|
854
|
2044 Let's not mess up systems without the problem. --ben)
|
|
502
|
2045 */
|
|
|
2046 sleep (1);
|
|
|
2047 #endif
|
|
|
2048 retry++;
|
|
|
2049 goto loop;
|
|
|
2050 }
|
|
|
2051
|
|
|
2052 failed_connect = 1;
|
|
771
|
2053 retry_close (s);
|
|
502
|
2054 s = -1;
|
|
|
2055
|
|
|
2056 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
2057 speed_up_interrupts ();
|
|
|
2058 #endif
|
|
|
2059
|
|
|
2060 continue;
|
|
|
2061 }
|
|
|
2062
|
|
|
2063 #ifdef USE_GETADDRINFO
|
|
|
2064 if (port == 0)
|
|
|
2065 {
|
|
|
2066 int gni;
|
|
|
2067 char servbuf[NI_MAXSERV];
|
|
|
2068
|
|
|
2069 if (EQ (protocol, Qtcp))
|
|
|
2070 gni = getnameinfo (lres->ai_addr, lres->ai_addrlen,
|
|
|
2071 NULL, 0, servbuf, sizeof(servbuf),
|
|
|
2072 NI_NUMERICSERV);
|
|
|
2073 else /* EQ (protocol, Qudp) */
|
|
|
2074 gni = getnameinfo (lres->ai_addr, lres->ai_addrlen,
|
|
|
2075 NULL, 0, servbuf, sizeof(servbuf),
|
|
|
2076 NI_NUMERICSERV | NI_DGRAM);
|
|
|
2077
|
|
|
2078 if (gni == 0)
|
|
|
2079 port = strtol (servbuf, NULL, 10);
|
|
|
2080 }
|
|
|
2081
|
|
|
2082 break;
|
|
|
2083 #endif /* USE_GETADDRINFO */
|
|
|
2084 } /* address loop */
|
|
|
2085
|
|
|
2086 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
2087 speed_up_interrupts ();
|
|
|
2088 #endif
|
|
|
2089
|
|
|
2090 #ifdef USE_GETADDRINFO
|
|
|
2091 freeaddrinfo (res);
|
|
|
2092 #endif
|
|
428
|
2093
|
|
440
|
2094 if (s < 0)
|
|
502
|
2095 {
|
|
|
2096 errno = xerrno;
|
|
428
|
2097
|
|
502
|
2098 if (failed_connect)
|
|
563
|
2099 report_network_error ("connection failed", list3 (Qunbound, host,
|
|
|
2100 name));
|
|
502
|
2101 else
|
|
563
|
2102 report_network_error ("error creating socket", name);
|
|
440
|
2103 }
|
|
|
2104 }
|
|
428
|
2105
|
|
|
2106 inch = s;
|
|
|
2107 outch = dup (s);
|
|
|
2108 if (outch < 0)
|
|
|
2109 {
|
|
563
|
2110 int save_errno = errno;
|
|
771
|
2111 retry_close (s); /* this used to be leaked; from Kyle Jones */
|
|
563
|
2112 errno = save_errno;
|
|
|
2113 report_network_error ("error duplicating socket", name);
|
|
428
|
2114 }
|
|
|
2115
|
|
|
2116 set_socket_nonblocking_maybe (inch, port, "tcp");
|
|
|
2117
|
|
502
|
2118 *vinfd = (void *) inch;
|
|
|
2119 *voutfd = (void *) outch;
|
|
428
|
2120 }
|
|
|
2121
|
|
|
2122
|
|
|
2123 #ifdef HAVE_MULTICAST
|
|
|
2124
|
|
442
|
2125 /* Didier Verna <didier@xemacs.org> Nov. 28 1997.
|
|
428
|
2126
|
|
|
2127 This function is similar to open-network-stream-internal, but provides a
|
|
|
2128 mean to open an UDP multicast connection instead of a TCP one. Like in the
|
|
|
2129 TCP case, the multicast connection will be seen as a sub-process,
|
|
|
2130
|
|
|
2131 Some notes:
|
|
|
2132 - Normally, we should use sendto and recvfrom with non connected
|
|
|
2133 sockets. The current code doesn't allow us to do this. In the future, it
|
|
|
2134 would be a good idea to extend the process data structure in order to deal
|
|
|
2135 properly with the different types network connections.
|
|
|
2136 - For the same reason, when leaving a multicast group, it is better to make
|
|
|
2137 a setsockopt - IP_DROP_MEMBERSHIP before closing the descriptors.
|
|
|
2138 Unfortunately, this can't be done here because delete_process doesn't know
|
|
|
2139 about the kind of connection we have. However, this is not such an
|
|
|
2140 important issue.
|
|
|
2141 */
|
|
|
2142
|
|
|
2143 static void
|
|
442
|
2144 unix_open_multicast_group (Lisp_Object name, Lisp_Object dest,
|
|
853
|
2145 Lisp_Object port, Lisp_Object ttl, void **vinfd,
|
|
|
2146 void **voutfd)
|
|
428
|
2147 {
|
|
|
2148 struct ip_mreq imr;
|
|
|
2149 struct sockaddr_in sa;
|
|
|
2150 struct protoent *udp;
|
|
|
2151 int ws, rs;
|
|
|
2152 int theport;
|
|
|
2153 unsigned char thettl;
|
|
|
2154 int one = 1; /* For REUSEADDR */
|
|
|
2155 int ret;
|
|
|
2156 volatile int retry = 0;
|
|
|
2157
|
|
|
2158 CHECK_STRING (dest);
|
|
|
2159
|
|
|
2160 CHECK_NATNUM (port);
|
|
|
2161 theport = htons ((unsigned short) XINT (port));
|
|
|
2162
|
|
|
2163 CHECK_NATNUM (ttl);
|
|
|
2164 thettl = (unsigned char) XINT (ttl);
|
|
|
2165
|
|
|
2166 if ((udp = getprotobyname ("udp")) == NULL)
|
|
563
|
2167 invalid_operation ("No info available for UDP protocol", Qunbound);
|
|
428
|
2168
|
|
|
2169 /* Init the sockets. Yes, I need 2 sockets. I couldn't duplicate one. */
|
|
|
2170 if ((rs = socket (PF_INET, SOCK_DGRAM, udp->p_proto)) < 0)
|
|
563
|
2171 report_network_error ("error creating socket", name);
|
|
428
|
2172 if ((ws = socket (PF_INET, SOCK_DGRAM, udp->p_proto)) < 0)
|
|
|
2173 {
|
|
563
|
2174 int save_errno = errno;
|
|
771
|
2175 retry_close (rs);
|
|
563
|
2176 errno = save_errno;
|
|
|
2177 report_network_error ("error creating socket", name);
|
|
428
|
2178 }
|
|
|
2179
|
|
|
2180 /* This will be used for both sockets */
|
|
|
2181 memset (&sa, 0, sizeof(sa));
|
|
|
2182 sa.sin_family = AF_INET;
|
|
|
2183 sa.sin_port = theport;
|
|
671
|
2184 sa.sin_addr.s_addr = inet_addr ((char *) XSTRING_DATA (dest));
|
|
428
|
2185
|
|
|
2186 /* Socket configuration for reading ------------------------ */
|
|
|
2187
|
|
|
2188 /* Multiple connections from the same machine. This must be done before
|
|
|
2189 bind. If it fails, it shouldn't be fatal. The only consequence is that
|
|
|
2190 people won't be able to connect twice from the same machine. */
|
|
|
2191 if (setsockopt (rs, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof (one))
|
|
|
2192 < 0)
|
|
|
2193 warn_when_safe (Qmulticast, Qwarning, "Cannot reuse socket address");
|
|
|
2194
|
|
|
2195 /* bind socket name */
|
|
|
2196 if (bind (rs, (struct sockaddr *)&sa, sizeof(sa)))
|
|
|
2197 {
|
|
563
|
2198 int save_errno = errno;
|
|
771
|
2199 retry_close (rs);
|
|
|
2200 retry_close (ws);
|
|
563
|
2201 errno = save_errno;
|
|
|
2202 report_network_error ("error binding socket", list3 (Qunbound, name,
|
|
|
2203 port));
|
|
428
|
2204 }
|
|
|
2205
|
|
|
2206 /* join multicast group */
|
|
671
|
2207 imr.imr_multiaddr.s_addr = inet_addr ((char *) XSTRING_DATA (dest));
|
|
428
|
2208 imr.imr_interface.s_addr = htonl (INADDR_ANY);
|
|
|
2209 if (setsockopt (rs, IPPROTO_IP, IP_ADD_MEMBERSHIP,
|
|
442
|
2210 &imr, sizeof (struct ip_mreq)) < 0)
|
|
428
|
2211 {
|
|
563
|
2212 int save_errno = errno;
|
|
771
|
2213 retry_close (ws);
|
|
|
2214 retry_close (rs);
|
|
563
|
2215 errno = save_errno;
|
|
|
2216 report_network_error ("error adding membership", list3 (Qunbound, name,
|
|
|
2217 dest));
|
|
428
|
2218 }
|
|
|
2219
|
|
|
2220 /* Socket configuration for writing ----------------------- */
|
|
|
2221
|
|
|
2222 /* Normally, there's no 'connect' in multicast, since we prefer to use
|
|
|
2223 'sendto' and 'recvfrom'. However, in order to handle this connection in
|
|
|
2224 the process-like way it is done for TCP, we must be able to use 'write'
|
|
|
2225 instead of 'sendto'. Consequently, we 'connect' this socket. */
|
|
|
2226
|
|
|
2227 /* See open-network-stream-internal for comments on this part of the code */
|
|
502
|
2228 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2229 slow_down_interrupts ();
|
|
502
|
2230 #endif
|
|
428
|
2231
|
|
|
2232 loop:
|
|
|
2233
|
|
|
2234 /* A system call interrupted with a SIGALRM or SIGIO comes back
|
|
|
2235 here, with can_break_system_calls reset to 0. */
|
|
|
2236 SETJMP (break_system_call_jump);
|
|
|
2237 if (QUITP)
|
|
|
2238 {
|
|
502
|
2239 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2240 speed_up_interrupts ();
|
|
502
|
2241 #endif
|
|
853
|
2242 QUIT;
|
|
428
|
2243 /* In case something really weird happens ... */
|
|
502
|
2244 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2245 slow_down_interrupts ();
|
|
502
|
2246 #endif
|
|
428
|
2247 }
|
|
|
2248
|
|
|
2249 /* Break out of connect with a signal (it isn't otherwise possible).
|
|
|
2250 Thus you don't get screwed with a hung network. */
|
|
|
2251 can_break_system_calls = 1;
|
|
|
2252 ret = connect (ws, (struct sockaddr *) &sa, sizeof (sa));
|
|
|
2253 can_break_system_calls = 0;
|
|
|
2254 if (ret == -1 && errno != EISCONN)
|
|
|
2255 {
|
|
|
2256 int xerrno = errno;
|
|
|
2257
|
|
859
|
2258 if (errno == EINTR || errno == EINPROGRESS || errno == EALREADY)
|
|
428
|
2259 goto loop;
|
|
|
2260 if (errno == EADDRINUSE && retry < 20)
|
|
|
2261 {
|
|
859
|
2262 #ifdef __FreeBSD__
|
|
428
|
2263 /* A delay here is needed on some FreeBSD systems,
|
|
|
2264 and it is harmless, since this retrying takes time anyway
|
|
|
2265 and should be infrequent.
|
|
|
2266 `sleep-for' allowed for quitting this loop with interrupts
|
|
|
2267 slowed down so it can't be used here. Async timers should
|
|
|
2268 already be disabled at this point so we can use `sleep'. */
|
|
|
2269 sleep (1);
|
|
859
|
2270 #endif
|
|
428
|
2271 retry++;
|
|
|
2272 goto loop;
|
|
|
2273 }
|
|
|
2274
|
|
771
|
2275 retry_close (rs);
|
|
|
2276 retry_close (ws);
|
|
502
|
2277 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2278 speed_up_interrupts ();
|
|
502
|
2279 #endif
|
|
428
|
2280
|
|
|
2281 errno = xerrno;
|
|
563
|
2282 report_network_error ("error connecting socket", list3 (Qunbound, name,
|
|
|
2283 port));
|
|
428
|
2284 }
|
|
|
2285
|
|
502
|
2286 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2287 speed_up_interrupts ();
|
|
502
|
2288 #endif
|
|
428
|
2289
|
|
|
2290 /* scope */
|
|
|
2291 if (setsockopt (ws, IPPROTO_IP, IP_MULTICAST_TTL,
|
|
442
|
2292 &thettl, sizeof (thettl)) < 0)
|
|
428
|
2293 {
|
|
563
|
2294 int save_errno = errno;
|
|
771
|
2295 retry_close (rs);
|
|
|
2296 retry_close (ws);
|
|
563
|
2297 errno = save_errno;
|
|
|
2298 report_network_error ("error setting ttl", list3 (Qunbound, name, ttl));
|
|
428
|
2299 }
|
|
|
2300
|
|
|
2301 set_socket_nonblocking_maybe (rs, theport, "udp");
|
|
|
2302
|
|
|
2303 *vinfd = (void*)rs;
|
|
|
2304 *voutfd = (void*)ws;
|
|
|
2305 }
|
|
|
2306
|
|
|
2307 #endif /* HAVE_MULTICAST */
|
|
|
2308
|
|
|
2309 #endif /* HAVE_SOCKETS */
|
|
|
2310
|
|
|
2311
|
|
|
2312 /**********************************************************************/
|
|
|
2313 /* Initialization */
|
|
|
2314 /**********************************************************************/
|
|
|
2315
|
|
|
2316 void
|
|
|
2317 process_type_create_unix (void)
|
|
|
2318 {
|
|
|
2319 PROCESS_HAS_METHOD (unix, alloc_process_data);
|
|
|
2320 #ifdef SIGCHLD
|
|
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2321 PROCESS_HAS_METHOD (unix, init_process);
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2322 PROCESS_HAS_METHOD (unix, reap_exited_processes);
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2323 #endif
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2324 PROCESS_HAS_METHOD (unix, init_process_io_handles);
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2325 PROCESS_HAS_METHOD (unix, create_process);
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2326 PROCESS_HAS_METHOD (unix, tooltalk_connection_p);
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2327 PROCESS_HAS_METHOD (unix, set_window_size);
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2328 #ifdef HAVE_WAITPID
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2329 PROCESS_HAS_METHOD (unix, update_status_if_terminated);
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2330 #endif
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2331 PROCESS_HAS_METHOD (unix, send_process);
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2332 PROCESS_HAS_METHOD (unix, process_send_eof);
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2333 PROCESS_HAS_METHOD (unix, deactivate_process);
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2334 PROCESS_HAS_METHOD (unix, kill_child_process);
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2335 PROCESS_HAS_METHOD (unix, kill_process_by_pid);
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2336 #ifdef HAVE_SOCKETS
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2337 PROCESS_HAS_METHOD (unix, canonicalize_host_name);
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2338 PROCESS_HAS_METHOD (unix, open_network_stream);
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2339 #ifdef HAVE_MULTICAST
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2340 PROCESS_HAS_METHOD (unix, open_multicast_group);
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2341 #endif
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2342 #endif
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2343 }
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2344
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2345 void
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2346 vars_of_process_unix (void)
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|
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2347 {
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2348 Fprovide (intern ("unix-processes"));
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2349 }
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2350
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2351 #endif /* !defined (NO_SUBPROCESSES) */
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