|
428
|
1 /* Asynchronous subprocess implementation for UNIX
|
|
|
2 Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 1995
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|
|
3 Free Software Foundation, Inc.
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|
4 Copyright (C) 1995 Sun Microsystems, Inc.
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|
|
5 Copyright (C) 1995, 1996 Ben Wing.
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|
|
6
|
|
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7 This file is part of XEmacs.
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|
|
8
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|
|
9 XEmacs is free software; you can redistribute it and/or modify it
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|
10 under the terms of the GNU General Public License as published by the
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|
|
11 Free Software Foundation; either version 2, or (at your option) any
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|
|
12 later version.
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|
|
13
|
|
|
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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|
|
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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|
|
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
17 for more details.
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|
18
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|
|
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
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|
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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|
|
22 Boston, MA 02111-1307, USA. */
|
|
|
23
|
|
|
24 /* This file has been Mule-ized except for `start-process-internal',
|
|
|
25 `open-network-stream-internal' and `open-multicast-group-internal'. */
|
|
|
26
|
|
|
27 /* This file has been split into process.c and process-unix.c by
|
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|
28 Kirill M. Katsnelson <kkm@kis.ru>, so please bash him and not
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|
29 the original author(s) */
|
|
|
30
|
|
440
|
31 /* The IPv6 support is derived from the code for GNU Emacs-20.3
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|
|
32 written by Wolfgang S. Rupprecht */
|
|
|
33
|
|
428
|
34 #include <config.h>
|
|
|
35
|
|
|
36 #if !defined (NO_SUBPROCESSES)
|
|
|
37
|
|
|
38 /* The entire file is within this conditional */
|
|
|
39
|
|
|
40 #include "lisp.h"
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|
|
41
|
|
|
42 #include "buffer.h"
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|
|
43 #include "events.h"
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|
|
44 #include "frame.h"
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|
|
45 #include "hash.h"
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|
|
46 #include "lstream.h"
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|
|
47 #include "opaque.h"
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|
|
48 #include "process.h"
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|
|
49 #include "procimpl.h"
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|
|
50 #include "sysdep.h"
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|
|
51 #include "window.h"
|
|
|
52 #ifdef FILE_CODING
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|
|
53 #include "file-coding.h"
|
|
|
54 #endif
|
|
|
55
|
|
|
56 #include <setjmp.h>
|
|
|
57 #include "sysfile.h"
|
|
|
58 #include "sysproc.h"
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|
|
59 #include "systime.h"
|
|
|
60 #include "syssignal.h" /* Always include before systty.h */
|
|
|
61 #include "systty.h"
|
|
|
62 #include "syswait.h"
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|
|
63
|
|
442
|
64 #ifdef HPUX
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|
|
65 #include <grp.h> /* See grantpt fixups for HPUX below. */
|
|
|
66 #endif
|
|
428
|
67
|
|
502
|
68 #if defined (HAVE_GETADDRINFO) && defined (HAVE_GETNAMEINFO)
|
|
|
69 #define USE_GETADDRINFO
|
|
|
70 #endif
|
|
|
71
|
|
|
72
|
|
428
|
73 /*
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|
|
74 * Implementation-specific data. Pointed to by Lisp_Process->process_data
|
|
|
75 */
|
|
|
76
|
|
|
77 struct unix_process_data
|
|
|
78 {
|
|
|
79 /* Non-0 if this is really a ToolTalk channel. */
|
|
|
80 int connected_via_filedesc_p;
|
|
|
81 /* Descriptor by which we read from this process. -1 for dead process */
|
|
|
82 int infd;
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|
|
83 /* Descriptor for the tty which this process is using.
|
|
|
84 -1 if we didn't record it (on some systems, there's no need). */
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|
|
85 int subtty;
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|
|
86 /* Name of subprocess terminal. */
|
|
|
87 Lisp_Object tty_name;
|
|
|
88 /* Non-false if communicating through a pty. */
|
|
|
89 char pty_flag;
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|
|
90 };
|
|
|
91
|
|
|
92 #define UNIX_DATA(p) ((struct unix_process_data*)((p)->process_data))
|
|
|
93
|
|
|
94
|
|
|
95
|
|
|
96 /**********************************************************************/
|
|
|
97 /* Static helper routines */
|
|
|
98 /**********************************************************************/
|
|
|
99
|
|
|
100 static SIGTYPE
|
|
|
101 close_safely_handler (int signo)
|
|
|
102 {
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|
|
103 EMACS_REESTABLISH_SIGNAL (signo, close_safely_handler);
|
|
|
104 SIGRETURN;
|
|
|
105 }
|
|
|
106
|
|
|
107 static void
|
|
|
108 close_safely (int fd)
|
|
|
109 {
|
|
|
110 stop_interrupts ();
|
|
|
111 signal (SIGALRM, close_safely_handler);
|
|
|
112 alarm (1);
|
|
|
113 close (fd);
|
|
|
114 alarm (0);
|
|
|
115 start_interrupts ();
|
|
|
116 }
|
|
|
117
|
|
|
118 static void
|
|
|
119 close_descriptor_pair (int in, int out)
|
|
|
120 {
|
|
|
121 if (in >= 0)
|
|
|
122 close (in);
|
|
|
123 if (out != in && out >= 0)
|
|
|
124 close (out);
|
|
|
125 }
|
|
|
126
|
|
|
127 /* Close all descriptors currently in use for communication
|
|
|
128 with subprocess. This is used in a newly-forked subprocess
|
|
|
129 to get rid of irrelevant descriptors. */
|
|
|
130
|
|
|
131 static int
|
|
442
|
132 close_process_descs_mapfun (const void* key, void* contents, void* arg)
|
|
428
|
133 {
|
|
|
134 Lisp_Object proc;
|
|
|
135 CVOID_TO_LISP (proc, contents);
|
|
|
136 event_stream_delete_stream_pair (XPROCESS(proc)->pipe_instream,
|
|
|
137 XPROCESS(proc)->pipe_outstream);
|
|
|
138 return 0;
|
|
|
139 }
|
|
|
140
|
|
|
141 /* #### This function is currently called from child_setup
|
|
|
142 in callproc.c. It should become static though - kkm */
|
|
|
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;
|
|
442
|
192 init_process_io_handles (XPROCESS (proc), (void*)inch, (void*)XINT (outfd),
|
|
|
193 0);
|
|
428
|
194 UNIX_DATA (XPROCESS (proc))->connected_via_filedesc_p = 1;
|
|
|
195
|
|
|
196 event_stream_select_process (XPROCESS (proc));
|
|
|
197
|
|
|
198 return proc;
|
|
|
199 }
|
|
|
200
|
|
|
201 #ifdef HAVE_PTYS
|
|
442
|
202 static int allocate_pty_the_old_fashioned_way (void);
|
|
|
203
|
|
|
204 /* The file name of the (slave) pty opened by allocate_pty(). */
|
|
|
205 #ifndef MAX_PTYNAME_LEN
|
|
|
206 #define MAX_PTYNAME_LEN 64
|
|
|
207 #endif
|
|
|
208 static char pty_name[MAX_PTYNAME_LEN];
|
|
428
|
209
|
|
|
210 /* Open an available pty, returning a file descriptor.
|
|
|
211 Return -1 on failure.
|
|
|
212 The file name of the terminal corresponding to the pty
|
|
442
|
213 is left in the variable `pty_name'. */
|
|
428
|
214
|
|
|
215 static int
|
|
|
216 allocate_pty (void)
|
|
|
217 {
|
|
442
|
218 /* Unix98 standardized grantpt, unlockpt, and ptsname, but not the
|
|
|
219 functions required to open a master pty in the first place :-(
|
|
|
220
|
|
|
221 Modern Unix systems all seems to have convenience methods to open
|
|
|
222 a master pty fd in one function call, but there is little
|
|
|
223 agreement on how to do it.
|
|
|
224
|
|
|
225 allocate_pty() tries all the different known easy ways of opening
|
|
|
226 a pty. In case of failure, we resort to the old BSD-style pty
|
|
|
227 grovelling code in allocate_pty_the_old_fashioned_way(). */
|
|
|
228 int master_fd = -1;
|
|
|
229 const char *slave_name = NULL;
|
|
|
230 const char *clone = NULL;
|
|
|
231 static const char * const clones[] = /* Different pty master clone devices */
|
|
|
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);
|
|
|
256 close (slave_fd);
|
|
|
257 goto have_slave_name;
|
|
|
258 }
|
|
|
259 else
|
|
|
260 {
|
|
|
261 if (master_fd >= 0)
|
|
|
262 close (master_fd);
|
|
|
263 if (slave_fd >= 0)
|
|
|
264 close (slave_fd);
|
|
|
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];
|
|
|
284 master_fd = open (clone, O_RDWR | O_NONBLOCK | OPEN_BINARY, 0);
|
|
|
285 if (master_fd >= 0)
|
|
|
286 goto have_master;
|
|
|
287 }
|
|
|
288 clone = NULL;
|
|
|
289 }
|
|
|
290
|
|
|
291 goto lose;
|
|
|
292
|
|
|
293 have_master:
|
|
|
294
|
|
|
295 #if defined (HAVE_PTSNAME)
|
|
|
296 slave_name = ptsname (master_fd);
|
|
|
297 if (slave_name)
|
|
|
298 goto have_slave_name;
|
|
|
299 #endif
|
|
|
300
|
|
|
301 /* AIX docs say to use ttyname, not ptsname, to get slave_name */
|
|
|
302 if (clone
|
|
|
303 && !strcmp (clone, "/dev/ptc")
|
|
|
304 && (slave_name = ttyname (master_fd)) != NULL)
|
|
|
305 goto have_slave_name;
|
|
|
306
|
|
|
307 goto lose;
|
|
|
308
|
|
|
309 have_slave_name:
|
|
|
310 strncpy (pty_name, slave_name, sizeof (pty_name));
|
|
|
311 pty_name[sizeof (pty_name) - 1] = '\0';
|
|
|
312 setup_pty (master_fd);
|
|
|
313
|
|
|
314 /* We jump through some hoops to frob the pty.
|
|
|
315 It's not obvious that checking the return code here is useful. */
|
|
|
316
|
|
|
317 /* "The grantpt() function will fail if it is unable to successfully
|
|
|
318 invoke the setuid root program. It may also fail if the
|
|
|
319 application has installed a signal handler to catch SIGCHLD
|
|
|
320 signals." */
|
|
|
321 #if defined (HAVE_GRANTPT) || defined (HAVE_UNLOCKPT)
|
|
|
322 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
323
|
|
|
324 #if defined (HAVE_GRANTPT)
|
|
|
325 grantpt (master_fd);
|
|
|
326 #ifdef HPUX
|
|
|
327 /* grantpt() behavior on some versions of HP-UX differs from what's
|
|
|
328 specified in the man page: the group of the slave PTY is set to
|
|
|
329 the user's primary group, and we fix that. */
|
|
|
330 {
|
|
|
331 struct group *tty_group = getgrnam ("tty");
|
|
|
332 if (tty_group != NULL)
|
|
|
333 chown (pty_name, (uid_t) -1, tty_group->gr_gid);
|
|
|
334 }
|
|
|
335 #endif /* HPUX has broken grantpt() */
|
|
|
336 #endif /* HAVE_GRANTPT */
|
|
|
337
|
|
|
338 #if defined (HAVE_UNLOCKPT)
|
|
|
339 unlockpt (master_fd);
|
|
|
340 #endif
|
|
|
341
|
|
|
342 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
343 #endif /* HAVE_GRANTPT || HAVE_UNLOCKPT */
|
|
|
344
|
|
|
345 return master_fd;
|
|
|
346
|
|
|
347 lose:
|
|
|
348 if (master_fd >= 0)
|
|
|
349 close (master_fd);
|
|
|
350 return allocate_pty_the_old_fashioned_way ();
|
|
|
351 }
|
|
|
352
|
|
|
353 /* This function tries to allocate a pty by iterating through file
|
|
|
354 pairs with names like /dev/ptyp1 and /dev/ttyp1. */
|
|
|
355 static int
|
|
|
356 allocate_pty_the_old_fashioned_way (void)
|
|
|
357 {
|
|
428
|
358 struct stat stb;
|
|
|
359
|
|
|
360 /* Some systems name their pseudoterminals so that there are gaps in
|
|
|
361 the usual sequence - for example, on HP9000/S700 systems, there
|
|
|
362 are no pseudoterminals with names ending in 'f'. So we wait for
|
|
|
363 three failures in a row before deciding that we've reached the
|
|
|
364 end of the ptys. */
|
|
|
365 int failed_count = 0;
|
|
|
366 int fd;
|
|
|
367 int i;
|
|
|
368 int c;
|
|
|
369
|
|
|
370 #ifdef PTY_ITERATION
|
|
|
371 PTY_ITERATION
|
|
|
372 #else
|
|
442
|
373 # ifndef FIRST_PTY_LETTER
|
|
|
374 # define FIRST_PTY_LETTER 'p'
|
|
|
375 # endif
|
|
428
|
376 for (c = FIRST_PTY_LETTER; c <= 'z'; c++)
|
|
|
377 for (i = 0; i < 16; i++)
|
|
442
|
378 #endif /* PTY_ITERATION */
|
|
|
379
|
|
428
|
380 {
|
|
|
381 #ifdef PTY_NAME_SPRINTF
|
|
|
382 PTY_NAME_SPRINTF
|
|
|
383 #else
|
|
|
384 sprintf (pty_name, "/dev/pty%c%x", c, i);
|
|
|
385 #endif /* no PTY_NAME_SPRINTF */
|
|
|
386
|
|
442
|
387 if (xemacs_stat (pty_name, &stb) < 0)
|
|
428
|
388 {
|
|
442
|
389 if (++failed_count >= 3)
|
|
428
|
390 return -1;
|
|
|
391 }
|
|
|
392 else
|
|
|
393 failed_count = 0;
|
|
|
394 fd = open (pty_name, O_RDWR | O_NONBLOCK | OPEN_BINARY, 0);
|
|
|
395
|
|
|
396 if (fd >= 0)
|
|
|
397 {
|
|
|
398 #ifdef PTY_TTY_NAME_SPRINTF
|
|
|
399 PTY_TTY_NAME_SPRINTF
|
|
|
400 #else
|
|
|
401 sprintf (pty_name, "/dev/tty%c%x", c, i);
|
|
|
402 #endif /* no PTY_TTY_NAME_SPRINTF */
|
|
442
|
403 if (access (pty_name, R_OK | W_OK) == 0)
|
|
428
|
404 {
|
|
442
|
405 setup_pty (fd);
|
|
|
406 return fd;
|
|
428
|
407 }
|
|
442
|
408 close (fd);
|
|
428
|
409 }
|
|
442
|
410 } /* iteration */
|
|
428
|
411 return -1;
|
|
|
412 }
|
|
|
413 #endif /* HAVE_PTYS */
|
|
|
414
|
|
|
415 static int
|
|
|
416 create_bidirectional_pipe (int *inchannel, int *outchannel,
|
|
|
417 volatile int *forkin, volatile int *forkout)
|
|
|
418 {
|
|
|
419 int sv[2];
|
|
|
420
|
|
|
421 #ifdef SKTPAIR
|
|
|
422 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0)
|
|
|
423 return -1;
|
|
|
424 *outchannel = *inchannel = sv[0];
|
|
|
425 *forkout = *forkin = sv[1];
|
|
|
426 #else /* not SKTPAIR */
|
|
|
427 int temp;
|
|
|
428 temp = pipe (sv);
|
|
|
429 if (temp < 0) return -1;
|
|
|
430 *inchannel = sv[0];
|
|
|
431 *forkout = sv[1];
|
|
|
432 temp = pipe (sv);
|
|
|
433 if (temp < 0) return -1;
|
|
|
434 *outchannel = sv[1];
|
|
|
435 *forkin = sv[0];
|
|
|
436 #endif /* not SKTPAIR */
|
|
|
437 return 0;
|
|
|
438 }
|
|
|
439
|
|
|
440
|
|
|
441 #ifdef HAVE_SOCKETS
|
|
|
442
|
|
502
|
443 #ifndef USE_GETADDRINFO
|
|
428
|
444 static int
|
|
|
445 get_internet_address (Lisp_Object host, struct sockaddr_in *address,
|
|
|
446 Error_behavior errb)
|
|
|
447 {
|
|
|
448 struct hostent *host_info_ptr = NULL;
|
|
|
449 #ifdef TRY_AGAIN
|
|
|
450 int count = 0;
|
|
|
451 #endif
|
|
|
452
|
|
|
453 xzero (*address);
|
|
|
454
|
|
|
455 while (1)
|
|
|
456 {
|
|
|
457 #ifdef TRY_AGAIN
|
|
|
458 if (count++ > 10) break;
|
|
|
459 #ifndef BROKEN_CYGWIN
|
|
|
460 h_errno = 0;
|
|
|
461 #endif
|
|
|
462 #endif
|
|
|
463 /* Some systems can't handle SIGIO/SIGALARM in gethostbyname. */
|
|
|
464 slow_down_interrupts ();
|
|
|
465 host_info_ptr = gethostbyname ((char *) XSTRING_DATA (host));
|
|
|
466 speed_up_interrupts ();
|
|
|
467 #ifdef TRY_AGAIN
|
|
|
468 if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN))
|
|
|
469 #endif
|
|
|
470 break;
|
|
|
471 Fsleep_for (make_int (1));
|
|
|
472 }
|
|
|
473 if (host_info_ptr)
|
|
|
474 {
|
|
|
475 address->sin_family = host_info_ptr->h_addrtype;
|
|
502
|
476 memcpy (&address->sin_addr, host_info_ptr->h_addr,
|
|
|
477 host_info_ptr->h_length);
|
|
428
|
478 }
|
|
|
479 else
|
|
|
480 {
|
|
|
481 IN_ADDR numeric_addr;
|
|
|
482 /* Attempt to interpret host as numeric inet address */
|
|
|
483 numeric_addr = inet_addr ((char *) XSTRING_DATA (host));
|
|
|
484 if (NUMERIC_ADDR_ERROR)
|
|
|
485 {
|
|
|
486 maybe_error (Qprocess, errb,
|
|
|
487 "Unknown host \"%s\"", XSTRING_DATA (host));
|
|
|
488 return 0;
|
|
|
489 }
|
|
|
490
|
|
|
491 /* There was some broken code here that called strlen() here
|
|
|
492 on (char *) &numeric_addr and even sometimes accessed
|
|
|
493 uninitialized data. */
|
|
|
494 address->sin_family = AF_INET;
|
|
|
495 * (IN_ADDR *) &address->sin_addr = numeric_addr;
|
|
|
496 }
|
|
|
497
|
|
|
498 return 1;
|
|
|
499 }
|
|
502
|
500 #endif /* !USE_GETADDRINFO */
|
|
428
|
501
|
|
|
502 static void
|
|
442
|
503 set_socket_nonblocking_maybe (int fd, int port, const char* proto)
|
|
428
|
504 {
|
|
|
505 #ifdef PROCESS_IO_BLOCKING
|
|
|
506 Lisp_Object tail;
|
|
|
507
|
|
|
508 for (tail = network_stream_blocking_port_list; CONSP (tail); tail = XCDR (tail))
|
|
|
509 {
|
|
|
510 Lisp_Object tail_port = XCAR (tail);
|
|
|
511
|
|
|
512 if (STRINGP (tail_port))
|
|
|
513 {
|
|
|
514 struct servent *svc_info;
|
|
|
515 CHECK_STRING (tail_port);
|
|
|
516 svc_info = getservbyname ((char *) XSTRING_DATA (tail_port), proto);
|
|
|
517 if ((svc_info != 0) && (svc_info->s_port == port))
|
|
|
518 break;
|
|
|
519 else
|
|
|
520 continue;
|
|
|
521 }
|
|
|
522 else if (INTP (tail_port) && (htons ((unsigned short) XINT (tail_port)) == port))
|
|
|
523 break;
|
|
|
524 }
|
|
|
525
|
|
|
526 if (!CONSP (tail))
|
|
|
527 {
|
|
|
528 set_descriptor_non_blocking (fd);
|
|
|
529 }
|
|
|
530 #else
|
|
|
531 set_descriptor_non_blocking (fd);
|
|
|
532 #endif /* PROCESS_IO_BLOCKING */
|
|
|
533 }
|
|
|
534
|
|
|
535 #endif /* HAVE_SOCKETS */
|
|
|
536
|
|
|
537 /* Compute the Lisp form of the process status from
|
|
|
538 the numeric status that was returned by `wait'. */
|
|
|
539
|
|
|
540 static void
|
|
440
|
541 update_status_from_wait_code (Lisp_Process *p, int *w_fmh)
|
|
428
|
542 {
|
|
|
543 /* C compiler lossage when attempting to pass w directly */
|
|
|
544 int w = *w_fmh;
|
|
|
545
|
|
|
546 if (WIFSTOPPED (w))
|
|
|
547 {
|
|
|
548 p->status_symbol = Qstop;
|
|
|
549 p->exit_code = WSTOPSIG (w);
|
|
|
550 p->core_dumped = 0;
|
|
|
551 }
|
|
|
552 else if (WIFEXITED (w))
|
|
|
553 {
|
|
|
554 p->status_symbol = Qexit;
|
|
|
555 p->exit_code = WEXITSTATUS (w);
|
|
|
556 p->core_dumped = 0;
|
|
|
557 }
|
|
|
558 else if (WIFSIGNALED (w))
|
|
|
559 {
|
|
|
560 p->status_symbol = Qsignal;
|
|
|
561 p->exit_code = WTERMSIG (w);
|
|
|
562 p->core_dumped = WCOREDUMP (w);
|
|
|
563 }
|
|
|
564 else
|
|
|
565 {
|
|
|
566 p->status_symbol = Qrun;
|
|
|
567 p->exit_code = 0;
|
|
|
568 }
|
|
|
569 }
|
|
|
570
|
|
|
571 #ifdef SIGCHLD
|
|
|
572
|
|
|
573 #define MAX_EXITED_PROCESSES 1000
|
|
|
574 static volatile pid_t exited_processes[MAX_EXITED_PROCESSES];
|
|
|
575 static volatile int exited_processes_status[MAX_EXITED_PROCESSES];
|
|
|
576 static volatile int exited_processes_index;
|
|
|
577
|
|
|
578 static volatile int sigchld_happened;
|
|
|
579
|
|
|
580 /* On receipt of a signal that a child status has changed,
|
|
|
581 loop asking about children with changed statuses until
|
|
|
582 the system says there are no more. All we do is record
|
|
|
583 the processes and wait status.
|
|
|
584
|
|
|
585 This function could be called from within the SIGCHLD
|
|
|
586 handler, so it must be completely reentrant. When
|
|
|
587 not called from a SIGCHLD handler, BLOCK_SIGCHLD should
|
|
|
588 be non-zero so that SIGCHLD is blocked while this
|
|
|
589 function is running. (This is necessary so avoid
|
|
|
590 race conditions with the SIGCHLD_HAPPENED flag). */
|
|
|
591
|
|
|
592 static void
|
|
|
593 record_exited_processes (int block_sigchld)
|
|
|
594 {
|
|
|
595 if (!sigchld_happened)
|
|
|
596 {
|
|
|
597 return;
|
|
|
598 }
|
|
|
599
|
|
|
600 #ifdef EMACS_BLOCK_SIGNAL
|
|
|
601 if (block_sigchld)
|
|
|
602 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
603 #endif
|
|
|
604
|
|
|
605 while (sigchld_happened)
|
|
|
606 {
|
|
|
607 int pid;
|
|
|
608 int w;
|
|
|
609
|
|
|
610 /* Keep trying to get a status until we get a definitive result. */
|
|
|
611 do
|
|
|
612 {
|
|
|
613 errno = 0;
|
|
|
614 #ifdef WNOHANG
|
|
|
615 # ifndef WUNTRACED
|
|
|
616 # define WUNTRACED 0
|
|
|
617 # endif /* not WUNTRACED */
|
|
|
618 # ifdef HAVE_WAITPID
|
|
|
619 pid = waitpid ((pid_t) -1, &w, WNOHANG | WUNTRACED);
|
|
|
620 # else
|
|
|
621 pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
|
|
|
622 # endif
|
|
|
623 #else /* not WNOHANG */
|
|
|
624 pid = wait (&w);
|
|
|
625 #endif /* not WNOHANG */
|
|
|
626 }
|
|
|
627 while (pid <= 0 && errno == EINTR);
|
|
|
628
|
|
|
629 if (pid <= 0)
|
|
|
630 break;
|
|
|
631
|
|
|
632 if (exited_processes_index < MAX_EXITED_PROCESSES)
|
|
|
633 {
|
|
|
634 exited_processes[exited_processes_index] = pid;
|
|
|
635 exited_processes_status[exited_processes_index] = w;
|
|
|
636 exited_processes_index++;
|
|
|
637 }
|
|
|
638
|
|
|
639 /* On systems with WNOHANG, we just ignore the number
|
|
|
640 of times that SIGCHLD was signalled, and keep looping
|
|
|
641 until there are no more processes to wait on. If we
|
|
|
642 don't have WNOHANG, we have to rely on the count in
|
|
|
643 SIGCHLD_HAPPENED. */
|
|
|
644 #ifndef WNOHANG
|
|
|
645 sigchld_happened--;
|
|
|
646 #endif /* not WNOHANG */
|
|
|
647 }
|
|
|
648
|
|
|
649 sigchld_happened = 0;
|
|
|
650
|
|
|
651 if (block_sigchld)
|
|
|
652 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
653 }
|
|
|
654
|
|
|
655 /* For any processes that have changed status and are recorded
|
|
440
|
656 and such, update the corresponding Lisp_Process.
|
|
428
|
657 We separate this from record_exited_processes() so that
|
|
|
658 we never have to call this function from within a signal
|
|
|
659 handler. We block SIGCHLD in case record_exited_processes()
|
|
|
660 is called from a signal handler. */
|
|
|
661
|
|
|
662 /** USG WARNING: Although it is not obvious from the documentation
|
|
|
663 in signal(2), on a USG system the SIGCLD handler MUST NOT call
|
|
|
664 signal() before executing at least one wait(), otherwise the handler
|
|
|
665 will be called again, resulting in an infinite loop. The relevant
|
|
|
666 portion of the documentation reads "SIGCLD signals will be queued
|
|
|
667 and the signal-catching function will be continually reentered until
|
|
|
668 the queue is empty". Invoking signal() causes the kernel to reexamine
|
|
|
669 the SIGCLD queue. Fred Fish, UniSoft Systems Inc.
|
|
|
670
|
|
|
671 (Note that now this only applies in SYS V Release 2 and before.
|
|
|
672 On SYS V Release 3, we use sigset() to set the signal handler for
|
|
|
673 the first time, and so we don't have to reestablish the signal handler
|
|
|
674 in the handler below. On SYS V Release 4, we don't get this weirdo
|
|
|
675 behavior when we use sigaction(), which we do use.) */
|
|
|
676
|
|
|
677 static SIGTYPE
|
|
|
678 sigchld_handler (int signo)
|
|
|
679 {
|
|
|
680 #ifdef OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR
|
|
|
681 int old_errno = errno;
|
|
|
682
|
|
|
683 sigchld_happened++;
|
|
|
684 record_exited_processes (0);
|
|
|
685 errno = old_errno;
|
|
|
686 #else
|
|
|
687 sigchld_happened++;
|
|
|
688 #endif
|
|
|
689 #ifdef HAVE_UNIXOID_EVENT_LOOP
|
|
|
690 signal_fake_event ();
|
|
|
691 #endif
|
|
|
692 /* WARNING - must come after wait3() for USG systems */
|
|
|
693 EMACS_REESTABLISH_SIGNAL (signo, sigchld_handler);
|
|
|
694 SIGRETURN;
|
|
|
695 }
|
|
|
696
|
|
|
697 #endif /* SIGCHLD */
|
|
|
698
|
|
|
699 #ifdef SIGNALS_VIA_CHARACTERS
|
|
|
700 /* Get signal character to send to process if SIGNALS_VIA_CHARACTERS */
|
|
|
701
|
|
|
702 static int
|
|
|
703 process_signal_char (int tty_fd, int signo)
|
|
|
704 {
|
|
|
705 /* If it's not a tty, pray that these default values work */
|
|
442
|
706 if (! isatty (tty_fd)) {
|
|
428
|
707 #define CNTL(ch) (037 & (ch))
|
|
|
708 switch (signo)
|
|
|
709 {
|
|
442
|
710 case SIGINT: return CNTL ('C');
|
|
|
711 case SIGQUIT: return CNTL ('\\');
|
|
428
|
712 #ifdef SIGTSTP
|
|
442
|
713 case SIGTSTP: return CNTL ('Z');
|
|
428
|
714 #endif
|
|
|
715 }
|
|
|
716 }
|
|
|
717
|
|
|
718 #ifdef HAVE_TERMIOS
|
|
|
719 /* TERMIOS is the latest and bestest, and seems most likely to work.
|
|
|
720 If the system has it, use it. */
|
|
|
721 {
|
|
|
722 struct termios t;
|
|
|
723 tcgetattr (tty_fd, &t);
|
|
|
724 switch (signo)
|
|
|
725 {
|
|
|
726 case SIGINT: return t.c_cc[VINTR];
|
|
|
727 case SIGQUIT: return t.c_cc[VQUIT];
|
|
|
728 #if defined(SIGTSTP) && defined(VSUSP)
|
|
|
729 case SIGTSTP: return t.c_cc[VSUSP];
|
|
|
730 #endif
|
|
|
731 }
|
|
|
732 }
|
|
|
733
|
|
|
734 # elif defined (TIOCGLTC) && defined (TIOCGETC) /* not HAVE_TERMIOS */
|
|
|
735 {
|
|
|
736 /* On Berkeley descendants, the following IOCTL's retrieve the
|
|
|
737 current control characters. */
|
|
|
738 struct tchars c;
|
|
|
739 struct ltchars lc;
|
|
|
740 switch (signo)
|
|
|
741 {
|
|
|
742 case SIGINT: ioctl (tty_fd, TIOCGETC, &c); return c.t_intrc;
|
|
|
743 case SIGQUIT: ioctl (tty_fd, TIOCGETC, &c); return c.t_quitc;
|
|
|
744 # ifdef SIGTSTP
|
|
|
745 case SIGTSTP: ioctl (tty_fd, TIOCGLTC, &lc); return lc.t_suspc;
|
|
|
746 # endif /* SIGTSTP */
|
|
|
747 }
|
|
|
748 }
|
|
|
749
|
|
|
750 # elif defined (TCGETA) /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
|
|
|
751 {
|
|
|
752 /* On SYSV descendants, the TCGETA ioctl retrieves the current
|
|
|
753 control characters. */
|
|
|
754 struct termio t;
|
|
|
755 ioctl (tty_fd, TCGETA, &t);
|
|
|
756 switch (signo) {
|
|
|
757 case SIGINT: return t.c_cc[VINTR];
|
|
|
758 case SIGQUIT: return t.c_cc[VQUIT];
|
|
|
759 # ifdef SIGTSTP
|
|
|
760 case SIGTSTP: return t.c_cc[VSWTCH];
|
|
|
761 # endif /* SIGTSTP */
|
|
|
762 }
|
|
|
763 }
|
|
|
764 # else /* ! defined (TCGETA) */
|
|
|
765 #error ERROR! Using SIGNALS_VIA_CHARACTERS, but not HAVE_TERMIOS || (TIOCGLTC && TIOCGETC) || TCGETA
|
|
|
766 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
|
|
|
767 you'd better be using one of the alternatives above! */
|
|
|
768 # endif /* ! defined (TCGETA) */
|
|
|
769 return '\0';
|
|
|
770 }
|
|
|
771 #endif /* SIGNALS_VIA_CHARACTERS */
|
|
|
772
|
|
|
773
|
|
|
774
|
|
|
775
|
|
|
776 /**********************************************************************/
|
|
|
777 /* Process implementation methods */
|
|
|
778 /**********************************************************************/
|
|
|
779
|
|
|
780 /*
|
|
|
781 * Allocate and initialize Lisp_Process->process_data
|
|
|
782 */
|
|
|
783
|
|
|
784 static void
|
|
440
|
785 unix_alloc_process_data (Lisp_Process *p)
|
|
428
|
786 {
|
|
|
787 p->process_data = xnew (struct unix_process_data);
|
|
|
788
|
|
|
789 UNIX_DATA(p)->connected_via_filedesc_p = 0;
|
|
|
790 UNIX_DATA(p)->infd = -1;
|
|
|
791 UNIX_DATA(p)->subtty = -1;
|
|
|
792 UNIX_DATA(p)->tty_name = Qnil;
|
|
|
793 UNIX_DATA(p)->pty_flag = 0;
|
|
|
794 }
|
|
|
795
|
|
|
796 /*
|
|
|
797 * Mark any Lisp objects in Lisp_Process->process_data
|
|
|
798 */
|
|
|
799
|
|
|
800 static void
|
|
440
|
801 unix_mark_process_data (Lisp_Process *proc)
|
|
428
|
802 {
|
|
|
803 mark_object (UNIX_DATA(proc)->tty_name);
|
|
|
804 }
|
|
|
805
|
|
|
806 /*
|
|
|
807 * Initialize XEmacs process implementation once
|
|
|
808 */
|
|
|
809
|
|
|
810 #ifdef SIGCHLD
|
|
|
811 static void
|
|
|
812 unix_init_process (void)
|
|
|
813 {
|
|
|
814 #ifndef CANNOT_DUMP
|
|
|
815 if (! noninteractive || initialized)
|
|
|
816 #endif
|
|
|
817 signal (SIGCHLD, sigchld_handler);
|
|
|
818 }
|
|
|
819 #endif /* SIGCHLD */
|
|
|
820
|
|
|
821 /*
|
|
|
822 * Initialize any process local data. This is called when newly
|
|
|
823 * created process is connected to real OS file handles. The
|
|
|
824 * handles are generally represented by void* type, but are
|
|
442
|
825 * of type int (file descriptors) for UNIX.
|
|
428
|
826 */
|
|
|
827
|
|
|
828 static void
|
|
440
|
829 unix_init_process_io_handles (Lisp_Process *p, void* in, void* out, int flags)
|
|
428
|
830 {
|
|
|
831 UNIX_DATA(p)->infd = (int)in;
|
|
|
832 }
|
|
|
833
|
|
|
834 /*
|
|
|
835 * Fork off a subprocess. P is a pointer to a newly created subprocess
|
|
|
836 * object. If this function signals, the caller is responsible for
|
|
|
837 * deleting (and finalizing) the process object.
|
|
|
838 *
|
|
|
839 * The method must return PID of the new process, a (positive??? ####) number
|
|
|
840 * which fits into Lisp_Int. No return value indicates an error, the method
|
|
|
841 * must signal an error instead.
|
|
|
842 */
|
|
|
843
|
|
|
844 static int
|
|
440
|
845 unix_create_process (Lisp_Process *p,
|
|
428
|
846 Lisp_Object *argv, int nargv,
|
|
|
847 Lisp_Object program, Lisp_Object cur_dir)
|
|
|
848 {
|
|
|
849 int pid;
|
|
|
850 int inchannel = -1;
|
|
|
851 int outchannel = -1;
|
|
|
852 /* Use volatile to protect variables from being clobbered by longjmp. */
|
|
|
853 volatile int forkin = -1;
|
|
|
854 volatile int forkout = -1;
|
|
|
855 volatile int pty_flag = 0;
|
|
|
856
|
|
|
857 #ifdef HAVE_PTYS
|
|
|
858 if (!NILP (Vprocess_connection_type))
|
|
|
859 {
|
|
|
860 /* find a new pty, open the master side, return the opened
|
|
|
861 file handle, and store the name of the corresponding slave
|
|
|
862 side in global variable pty_name. */
|
|
|
863 outchannel = inchannel = allocate_pty ();
|
|
|
864 }
|
|
|
865
|
|
|
866 if (inchannel >= 0)
|
|
|
867 {
|
|
|
868 /* You're "supposed" to now open the slave in the child.
|
|
|
869 On some systems, we can open it here; this allows for
|
|
|
870 better error checking. */
|
|
|
871 #if !defined(USG)
|
|
|
872 /* On USG systems it does not work to open the pty's tty here
|
|
|
873 and then close and reopen it in the child. */
|
|
|
874 #ifdef O_NOCTTY
|
|
|
875 /* Don't let this terminal become our controlling terminal
|
|
|
876 (in case we don't have one). */
|
|
|
877 forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY | OPEN_BINARY, 0);
|
|
|
878 #else
|
|
|
879 forkout = forkin = open (pty_name, O_RDWR | OPEN_BINARY, 0);
|
|
|
880 #endif
|
|
|
881 if (forkin < 0)
|
|
|
882 goto io_failure;
|
|
|
883 #endif /* not USG */
|
|
|
884 UNIX_DATA(p)->pty_flag = pty_flag = 1;
|
|
|
885 }
|
|
|
886 else
|
|
|
887 #endif /* HAVE_PTYS */
|
|
|
888 if (create_bidirectional_pipe (&inchannel, &outchannel,
|
|
|
889 &forkin, &forkout) < 0)
|
|
|
890 goto io_failure;
|
|
|
891
|
|
|
892 #if 0
|
|
|
893 /* Replaced by close_process_descs */
|
|
|
894 set_exclusive_use (inchannel);
|
|
|
895 set_exclusive_use (outchannel);
|
|
|
896 #endif
|
|
|
897
|
|
|
898 set_descriptor_non_blocking (inchannel);
|
|
|
899
|
|
|
900 /* Record this as an active process, with its channels.
|
|
|
901 As a result, child_setup will close Emacs's side of the pipes. */
|
|
|
902 init_process_io_handles (p, (void*)inchannel, (void*)outchannel,
|
|
|
903 pty_flag ? STREAM_PTY_FLUSHING : 0);
|
|
|
904 /* Record the tty descriptor used in the subprocess. */
|
|
|
905 UNIX_DATA(p)->subtty = forkin;
|
|
|
906
|
|
|
907 {
|
|
442
|
908 #if !defined(CYGWIN)
|
|
428
|
909 /* child_setup must clobber environ on systems with true vfork.
|
|
|
910 Protect it from permanent change. */
|
|
|
911 char **save_environ = environ;
|
|
|
912 #endif
|
|
|
913
|
|
|
914 pid = fork ();
|
|
|
915 if (pid == 0)
|
|
|
916 {
|
|
|
917 /**** Now we're in the child process ****/
|
|
|
918 int xforkin = forkin;
|
|
|
919 int xforkout = forkout;
|
|
|
920
|
|
442
|
921 /* Disconnect the current controlling terminal, pursuant to
|
|
|
922 making the pty be the controlling terminal of the process.
|
|
|
923 Also put us in our own process group. */
|
|
|
924
|
|
|
925 disconnect_controlling_terminal ();
|
|
|
926
|
|
428
|
927 #ifdef HAVE_PTYS
|
|
442
|
928 if (pty_flag)
|
|
428
|
929 {
|
|
|
930 /* Open the pty connection and make the pty's terminal
|
|
|
931 our controlling terminal.
|
|
|
932
|
|
|
933 On systems with TIOCSCTTY, we just use it to set
|
|
|
934 the controlling terminal. On other systems, the
|
|
|
935 first TTY we open becomes the controlling terminal.
|
|
|
936 So, we end up with four possibilities:
|
|
|
937
|
|
|
938 (1) on USG and TIOCSCTTY systems, we open the pty
|
|
|
939 and use TIOCSCTTY.
|
|
|
940 (2) on other USG systems, we just open the pty.
|
|
|
941 (3) on non-USG systems with TIOCSCTTY, we
|
|
|
942 just use TIOCSCTTY. (On non-USG systems, we
|
|
|
943 already opened the pty in the parent process.)
|
|
|
944 (4) on non-USG systems without TIOCSCTTY, we
|
|
|
945 close the pty and reopen it.
|
|
|
946
|
|
|
947 This would be cleaner if we didn't open the pty
|
|
|
948 in the parent process, but doing it that way
|
|
|
949 makes it possible to trap error conditions.
|
|
|
950 It's harder to convey an error from the child
|
|
|
951 process, and I don't feel like messing with
|
|
|
952 this now. */
|
|
|
953
|
|
|
954 /* There was some weirdo, probably wrong,
|
|
|
955 conditionalization on RTU and UNIPLUS here.
|
|
|
956 I deleted it. So sue me. */
|
|
|
957
|
|
|
958 /* SunOS has TIOCSCTTY but the close/open method
|
|
|
959 also works. */
|
|
|
960
|
|
|
961 # if defined (USG) || !defined (TIOCSCTTY)
|
|
|
962 /* Now close the pty (if we had it open) and reopen it.
|
|
|
963 This makes the pty the controlling terminal of the
|
|
|
964 subprocess. */
|
|
|
965 /* I wonder if close (open (pty_name, ...)) would work? */
|
|
|
966 if (xforkin >= 0)
|
|
|
967 close (xforkin);
|
|
|
968 xforkout = xforkin = open (pty_name, O_RDWR | OPEN_BINARY, 0);
|
|
|
969 if (xforkin < 0)
|
|
|
970 {
|
|
|
971 write (1, "Couldn't open the pty terminal ", 31);
|
|
|
972 write (1, pty_name, strlen (pty_name));
|
|
|
973 write (1, "\n", 1);
|
|
|
974 _exit (1);
|
|
|
975 }
|
|
|
976 # endif /* USG or not TIOCSCTTY */
|
|
|
977
|
|
|
978 /* Miscellaneous setup required for some systems.
|
|
|
979 Must be done before using tc* functions on xforkin.
|
|
|
980 This guarantees that isatty(xforkin) is true. */
|
|
|
981
|
|
442
|
982 # if defined (HAVE_ISASTREAM) && defined (I_PUSH)
|
|
|
983 if (isastream (xforkin))
|
|
|
984 {
|
|
|
985 # if defined (I_FIND)
|
|
|
986 # define stream_module_pushed(fd, module) (ioctl (fd, I_FIND, module) == 1)
|
|
|
987 # else
|
|
|
988 # define stream_module_pushed(fd, module) 0
|
|
|
989 # endif
|
|
|
990 if (! stream_module_pushed (xforkin, "ptem"))
|
|
|
991 ioctl (xforkin, I_PUSH, "ptem");
|
|
|
992 if (! stream_module_pushed (xforkin, "ldterm"))
|
|
|
993 ioctl (xforkin, I_PUSH, "ldterm");
|
|
|
994 if (! stream_module_pushed (xforkin, "ttcompat"))
|
|
|
995 ioctl (xforkin, I_PUSH, "ttcompat");
|
|
|
996 }
|
|
|
997 # endif /* HAVE_ISASTREAM */
|
|
428
|
998
|
|
|
999 # ifdef TIOCSCTTY
|
|
|
1000 /* We ignore the return value
|
|
|
1001 because faith@cs.unc.edu says that is necessary on Linux. */
|
|
|
1002 assert (isatty (xforkin));
|
|
|
1003 ioctl (xforkin, TIOCSCTTY, 0);
|
|
|
1004 # endif /* TIOCSCTTY */
|
|
|
1005
|
|
|
1006 /* Change the line discipline. */
|
|
|
1007
|
|
|
1008 # if defined (HAVE_TERMIOS) && defined (LDISC1)
|
|
|
1009 {
|
|
|
1010 struct termios t;
|
|
|
1011 assert (isatty (xforkin));
|
|
|
1012 tcgetattr (xforkin, &t);
|
|
|
1013 t.c_lflag = LDISC1;
|
|
|
1014 if (tcsetattr (xforkin, TCSANOW, &t) < 0)
|
|
|
1015 perror ("create_process/tcsetattr LDISC1 failed\n");
|
|
|
1016 }
|
|
|
1017 # elif defined (NTTYDISC) && defined (TIOCSETD)
|
|
|
1018 {
|
|
|
1019 /* Use new line discipline. TIOCSETD is accepted and
|
|
|
1020 ignored on Sys5.4 systems with ttcompat. */
|
|
|
1021 int ldisc = NTTYDISC;
|
|
|
1022 assert (isatty (xforkin));
|
|
|
1023 ioctl (xforkin, TIOCSETD, &ldisc);
|
|
|
1024 }
|
|
|
1025 # endif /* TIOCSETD & NTTYDISC */
|
|
|
1026
|
|
|
1027 /* Make our process group be the foreground group
|
|
|
1028 of our new controlling terminal. */
|
|
|
1029
|
|
|
1030 {
|
|
442
|
1031 pid_t piddly = EMACS_GET_PROCESS_GROUP ();
|
|
428
|
1032 EMACS_SET_TTY_PROCESS_GROUP (xforkin, &piddly);
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 /* On AIX, we've disabled SIGHUP above once we start a
|
|
|
1036 child on a pty. Now reenable it in the child, so it
|
|
|
1037 will die when we want it to.
|
|
|
1038 JV: This needs to be done ALWAYS as we might have inherited
|
|
|
1039 a SIG_IGN handling from our parent (nohup) and we are in new
|
|
|
1040 process group.
|
|
|
1041 */
|
|
|
1042 signal (SIGHUP, SIG_DFL);
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 if (pty_flag)
|
|
|
1046 /* Set up the terminal characteristics of the pty. */
|
|
|
1047 child_setup_tty (xforkout);
|
|
|
1048
|
|
|
1049 #endif /* HAVE_PTYS */
|
|
|
1050
|
|
|
1051 signal (SIGINT, SIG_DFL);
|
|
|
1052 signal (SIGQUIT, SIG_DFL);
|
|
|
1053
|
|
|
1054 {
|
|
|
1055 char *current_dir;
|
|
|
1056 char **new_argv = alloca_array (char *, nargv + 2);
|
|
|
1057 int i;
|
|
|
1058
|
|
|
1059 /* Nothing below here GCs so our string pointers shouldn't move. */
|
|
|
1060 new_argv[0] = (char *) XSTRING_DATA (program);
|
|
|
1061 for (i = 0; i < nargv; i++)
|
|
|
1062 {
|
|
|
1063 CHECK_STRING (argv[i]);
|
|
|
1064 new_argv[i + 1] = (char *) XSTRING_DATA (argv[i]);
|
|
|
1065 }
|
|
|
1066 new_argv[i + 1] = 0;
|
|
|
1067
|
|
442
|
1068 LISP_STRING_TO_EXTERNAL (cur_dir, current_dir, Qfile_name);
|
|
428
|
1069
|
|
|
1070 child_setup (xforkin, xforkout, xforkout, new_argv, current_dir);
|
|
|
1071 }
|
|
|
1072
|
|
|
1073 } /**** End of child code ****/
|
|
|
1074
|
|
|
1075 /**** Back in parent process ****/
|
|
442
|
1076 #if !defined(CYGWIN)
|
|
428
|
1077 environ = save_environ;
|
|
|
1078 #endif
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 if (pid < 0)
|
|
|
1082 {
|
|
442
|
1083 int save_errno = errno;
|
|
428
|
1084 close_descriptor_pair (forkin, forkout);
|
|
442
|
1085 errno = save_errno;
|
|
428
|
1086 report_file_error ("Doing fork", Qnil);
|
|
|
1087 }
|
|
|
1088
|
|
|
1089 /* #### dmoore - why is this commented out, otherwise we leave
|
|
|
1090 subtty = forkin, but then we close forkin just below. */
|
|
|
1091 /* UNIX_DATA(p)->subtty = -1; */
|
|
|
1092
|
|
|
1093 /* If the subfork execv fails, and it exits,
|
|
|
1094 this close hangs. I don't know why.
|
|
|
1095 So have an interrupt jar it loose. */
|
|
|
1096 if (forkin >= 0)
|
|
|
1097 close_safely (forkin);
|
|
|
1098 if (forkin != forkout && forkout >= 0)
|
|
|
1099 close (forkout);
|
|
|
1100
|
|
|
1101 #ifdef HAVE_PTYS
|
|
|
1102 if (pty_flag)
|
|
|
1103 UNIX_DATA (p)->tty_name = build_string (pty_name);
|
|
|
1104 else
|
|
|
1105 #endif
|
|
|
1106 UNIX_DATA (p)->tty_name = Qnil;
|
|
|
1107
|
|
|
1108 /* Notice that SIGCHLD was not blocked. (This is not possible on
|
|
|
1109 some systems.) No biggie if SIGCHLD occurs right around the
|
|
|
1110 time that this call happens, because SIGCHLD() does not actually
|
|
|
1111 deselect the process (that doesn't occur until the next time
|
|
|
1112 we're waiting for an event, when status_notify() is called). */
|
|
|
1113 return pid;
|
|
|
1114
|
|
|
1115 io_failure:
|
|
|
1116 {
|
|
|
1117 int save_errno = errno;
|
|
|
1118 close_descriptor_pair (forkin, forkout);
|
|
|
1119 close_descriptor_pair (inchannel, outchannel);
|
|
|
1120 errno = save_errno;
|
|
|
1121 report_file_error ("Opening pty or pipe", Qnil);
|
|
|
1122 return 0; /* not reached */
|
|
|
1123 }
|
|
|
1124 }
|
|
|
1125
|
|
|
1126 /* Return nonzero if this process is a ToolTalk connection. */
|
|
|
1127
|
|
|
1128 static int
|
|
440
|
1129 unix_tooltalk_connection_p (Lisp_Process *p)
|
|
428
|
1130 {
|
|
|
1131 return UNIX_DATA(p)->connected_via_filedesc_p;
|
|
|
1132 }
|
|
|
1133
|
|
|
1134 /* This is called to set process' virtual terminal size */
|
|
|
1135
|
|
|
1136 static int
|
|
440
|
1137 unix_set_window_size (Lisp_Process* p, int cols, int rows)
|
|
428
|
1138 {
|
|
|
1139 return set_window_size (UNIX_DATA(p)->infd, cols, rows);
|
|
|
1140 }
|
|
|
1141
|
|
|
1142 /*
|
|
|
1143 * This method is called to update status fields of the process
|
|
|
1144 * structure. If the process has not existed, this method is
|
|
|
1145 * expected to do nothing.
|
|
|
1146 *
|
|
|
1147 * The method is called only for real child processes.
|
|
|
1148 */
|
|
|
1149
|
|
|
1150 #ifdef HAVE_WAITPID
|
|
|
1151 static void
|
|
440
|
1152 unix_update_status_if_terminated (Lisp_Process* p)
|
|
428
|
1153 {
|
|
|
1154 int w;
|
|
|
1155 #ifdef SIGCHLD
|
|
|
1156 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
1157 #endif
|
|
|
1158 if (waitpid (XINT (p->pid), &w, WNOHANG) == XINT (p->pid))
|
|
|
1159 {
|
|
|
1160 p->tick++;
|
|
|
1161 update_status_from_wait_code (p, &w);
|
|
|
1162 }
|
|
|
1163 #ifdef SIGCHLD
|
|
|
1164 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
1165 #endif
|
|
|
1166 }
|
|
|
1167 #endif
|
|
|
1168
|
|
|
1169 /*
|
|
|
1170 * Update status of all exited processes. Called when SIGCLD has signaled.
|
|
|
1171 */
|
|
|
1172
|
|
|
1173 #ifdef SIGCHLD
|
|
|
1174 static void
|
|
|
1175 unix_reap_exited_processes (void)
|
|
|
1176 {
|
|
|
1177 int i;
|
|
440
|
1178 Lisp_Process *p;
|
|
428
|
1179
|
|
|
1180 #ifndef OBNOXIOUS_SYSV_SIGCLD_BEHAVIOR
|
|
|
1181 record_exited_processes (1);
|
|
|
1182 #endif
|
|
|
1183
|
|
|
1184 if (exited_processes_index <= 0)
|
|
|
1185 {
|
|
|
1186 return;
|
|
|
1187 }
|
|
|
1188
|
|
|
1189 #ifdef EMACS_BLOCK_SIGNAL
|
|
|
1190 EMACS_BLOCK_SIGNAL (SIGCHLD);
|
|
|
1191 #endif
|
|
|
1192 for (i = 0; i < exited_processes_index; i++)
|
|
|
1193 {
|
|
|
1194 int pid = exited_processes[i];
|
|
|
1195 int w = exited_processes_status[i];
|
|
|
1196
|
|
|
1197 /* Find the process that signaled us, and record its status. */
|
|
|
1198
|
|
|
1199 p = 0;
|
|
|
1200 {
|
|
|
1201 Lisp_Object tail;
|
|
|
1202 LIST_LOOP (tail, Vprocess_list)
|
|
|
1203 {
|
|
|
1204 Lisp_Object proc = XCAR (tail);
|
|
|
1205 p = XPROCESS (proc);
|
|
|
1206 if (INTP (p->pid) && XINT (p->pid) == pid)
|
|
|
1207 break;
|
|
|
1208 p = 0;
|
|
|
1209 }
|
|
|
1210 }
|
|
|
1211
|
|
|
1212 if (p)
|
|
|
1213 {
|
|
|
1214 /* Change the status of the process that was found. */
|
|
|
1215 p->tick++;
|
|
|
1216 process_tick++;
|
|
|
1217 update_status_from_wait_code (p, &w);
|
|
|
1218
|
|
|
1219 /* If process has terminated, stop waiting for its output. */
|
|
|
1220 if (WIFSIGNALED (w) || WIFEXITED (w))
|
|
|
1221 {
|
|
|
1222 if (!NILP(p->pipe_instream))
|
|
|
1223 {
|
|
|
1224 /* We can't just call event_stream->unselect_process_cb (p)
|
|
|
1225 here, because that calls XtRemoveInput, which is not
|
|
|
1226 necessarily reentrant, so we can't call this at interrupt
|
|
|
1227 level.
|
|
|
1228 */
|
|
|
1229 }
|
|
|
1230 }
|
|
|
1231 }
|
|
|
1232 else
|
|
|
1233 {
|
|
|
1234 /* There was no asynchronous process found for that id. Check
|
|
|
1235 if we have a synchronous process. Only set sync process status
|
|
|
1236 if there is one, so we work OK with the waitpid() call in
|
|
|
1237 wait_for_termination(). */
|
|
|
1238 if (synch_process_alive != 0)
|
|
|
1239 { /* Set the global sync process status variables. */
|
|
|
1240 synch_process_alive = 0;
|
|
|
1241
|
|
|
1242 /* Report the status of the synchronous process. */
|
|
|
1243 if (WIFEXITED (w))
|
|
|
1244 synch_process_retcode = WEXITSTATUS (w);
|
|
|
1245 else if (WIFSIGNALED (w))
|
|
|
1246 synch_process_death = signal_name (WTERMSIG (w));
|
|
|
1247 }
|
|
|
1248 }
|
|
|
1249 }
|
|
|
1250
|
|
|
1251 exited_processes_index = 0;
|
|
|
1252
|
|
|
1253 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
|
|
|
1254 }
|
|
|
1255 #endif /* SIGCHLD */
|
|
|
1256
|
|
|
1257 /*
|
|
|
1258 * Stuff the entire contents of LSTREAM to the process output pipe
|
|
|
1259 */
|
|
|
1260
|
|
|
1261 static JMP_BUF send_process_frame;
|
|
|
1262
|
|
|
1263 static SIGTYPE
|
|
|
1264 send_process_trap (int signum)
|
|
|
1265 {
|
|
|
1266 EMACS_REESTABLISH_SIGNAL (signum, send_process_trap);
|
|
|
1267 EMACS_UNBLOCK_SIGNAL (signum);
|
|
|
1268 LONGJMP (send_process_frame, 1);
|
|
|
1269 }
|
|
|
1270
|
|
|
1271 static void
|
|
|
1272 unix_send_process (Lisp_Object proc, struct lstream* lstream)
|
|
|
1273 {
|
|
|
1274 /* Use volatile to protect variables from being clobbered by longjmp. */
|
|
|
1275 SIGTYPE (*volatile old_sigpipe) (int) = 0;
|
|
|
1276 volatile Lisp_Object vol_proc = proc;
|
|
440
|
1277 Lisp_Process *volatile p = XPROCESS (proc);
|
|
428
|
1278
|
|
442
|
1279 /* #### JV: layering violation?
|
|
|
1280
|
|
|
1281 This function knows too much about the relation between the encoding
|
|
|
1282 stream (DATA_OUTSTREAM) and the actual output stream p->output_stream.
|
|
|
1283
|
|
|
1284 If encoding streams properly forwarded all calls, we could simply
|
|
|
1285 use DATA_OUTSTREAM everywhere. */
|
|
|
1286
|
|
428
|
1287 if (!SETJMP (send_process_frame))
|
|
|
1288 {
|
|
|
1289 /* use a reasonable-sized buffer (somewhere around the size of the
|
|
|
1290 stream buffer) so as to avoid inundating the stream with blocked
|
|
|
1291 data. */
|
|
|
1292 Bufbyte chunkbuf[512];
|
|
|
1293 Bytecount chunklen;
|
|
|
1294
|
|
|
1295 while (1)
|
|
|
1296 {
|
|
462
|
1297 Lstream_data_count writeret;
|
|
428
|
1298
|
|
|
1299 chunklen = Lstream_read (lstream, chunkbuf, 512);
|
|
|
1300 if (chunklen <= 0)
|
|
|
1301 break; /* perhaps should abort() if < 0?
|
|
|
1302 This should never happen. */
|
|
|
1303 old_sigpipe =
|
|
|
1304 (SIGTYPE (*) (int)) signal (SIGPIPE, send_process_trap);
|
|
|
1305 /* Lstream_write() will never successfully write less than
|
|
|
1306 the amount sent in. In the worst case, it just buffers
|
|
|
1307 the unwritten data. */
|
|
|
1308 writeret = Lstream_write (XLSTREAM (DATA_OUTSTREAM(p)), chunkbuf,
|
|
|
1309 chunklen);
|
|
|
1310 signal (SIGPIPE, old_sigpipe);
|
|
|
1311 if (writeret < 0)
|
|
|
1312 /* This is a real error. Blocking errors are handled
|
|
|
1313 specially inside of the filedesc stream. */
|
|
|
1314 report_file_error ("writing to process", list1 (proc));
|
|
|
1315 while (Lstream_was_blocked_p (XLSTREAM (p->pipe_outstream)))
|
|
|
1316 {
|
|
|
1317 /* Buffer is full. Wait, accepting input;
|
|
|
1318 that may allow the program
|
|
|
1319 to finish doing output and read more. */
|
|
|
1320 Faccept_process_output (Qnil, make_int (1), Qnil);
|
|
442
|
1321 /* It could have *really* finished, deleting the process */
|
|
|
1322 if (NILP(p->pipe_outstream))
|
|
|
1323 return;
|
|
428
|
1324 old_sigpipe =
|
|
|
1325 (SIGTYPE (*) (int)) signal (SIGPIPE, send_process_trap);
|
|
|
1326 Lstream_flush (XLSTREAM (p->pipe_outstream));
|
|
|
1327 signal (SIGPIPE, old_sigpipe);
|
|
|
1328 }
|
|
|
1329 }
|
|
|
1330 }
|
|
|
1331 else
|
|
|
1332 { /* We got here from a longjmp() from the SIGPIPE handler */
|
|
|
1333 signal (SIGPIPE, old_sigpipe);
|
|
|
1334 /* Close the file lstream so we don't attempt to write to it further */
|
|
|
1335 /* #### There is controversy over whether this might cause fd leakage */
|
|
|
1336 /* my tests say no. -slb */
|
|
|
1337 XLSTREAM (p->pipe_outstream)->flags &= ~LSTREAM_FL_IS_OPEN;
|
|
|
1338 p->status_symbol = Qexit;
|
|
|
1339 p->exit_code = 256; /* #### SIGPIPE ??? */
|
|
|
1340 p->core_dumped = 0;
|
|
|
1341 p->tick++;
|
|
|
1342 process_tick++;
|
|
|
1343 deactivate_process (*((Lisp_Object *) (&vol_proc)));
|
|
442
|
1344 invalid_operation ("SIGPIPE raised on process; closed it", p->name);
|
|
428
|
1345 }
|
|
|
1346
|
|
|
1347 old_sigpipe = (SIGTYPE (*) (int)) signal (SIGPIPE, send_process_trap);
|
|
|
1348 Lstream_flush (XLSTREAM (DATA_OUTSTREAM(p)));
|
|
|
1349 signal (SIGPIPE, old_sigpipe);
|
|
|
1350 }
|
|
|
1351
|
|
|
1352 /*
|
|
|
1353 * Send EOF to the process. The default implementation simply
|
|
|
1354 * closes the output stream. The method must return 0 to call
|
|
|
1355 * the default implementation, or 1 if it has taken all care about
|
|
|
1356 * sending EOF to the process.
|
|
|
1357 */
|
|
|
1358
|
|
|
1359 static int
|
|
|
1360 unix_process_send_eof (Lisp_Object proc)
|
|
|
1361 {
|
|
|
1362 if (!UNIX_DATA (XPROCESS (proc))->pty_flag)
|
|
|
1363 return 0;
|
|
|
1364
|
|
|
1365 /* #### get_eof_char simply doesn't return the correct character
|
|
|
1366 here. Maybe it is needed to determine the right eof
|
|
|
1367 character in init_process_io_handles but here it simply screws
|
|
|
1368 things up. */
|
|
|
1369 #if 0
|
|
|
1370 Bufbyte eof_char = get_eof_char (XPROCESS (proc));
|
|
|
1371 send_process (proc, Qnil, &eof_char, 0, 1);
|
|
|
1372 #else
|
|
442
|
1373 send_process (proc, Qnil, (const Bufbyte *) "\004", 0, 1);
|
|
428
|
1374 #endif
|
|
|
1375 return 1;
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 /*
|
|
|
1379 * Called before the process is deactivated. The process object
|
|
|
1380 * is not immediately finalized, just undergoes a transition to
|
|
|
1381 * inactive state.
|
|
|
1382 *
|
|
|
1383 * The return value is a unique stream ID, as returned by
|
|
|
1384 * event_stream_delete_stream_pair
|
|
|
1385 *
|
|
|
1386 * In the lack of this method, only event_stream_delete_stream_pair
|
|
|
1387 * is called on both I/O streams of the process.
|
|
|
1388 *
|
|
|
1389 * The UNIX version guards this by ignoring possible SIGPIPE.
|
|
|
1390 */
|
|
|
1391
|
|
|
1392 static USID
|
|
440
|
1393 unix_deactivate_process (Lisp_Process *p)
|
|
428
|
1394 {
|
|
|
1395 SIGTYPE (*old_sigpipe) (int) = 0;
|
|
|
1396 USID usid;
|
|
|
1397
|
|
|
1398 if (UNIX_DATA(p)->infd >= 0)
|
|
|
1399 flush_pending_output (UNIX_DATA(p)->infd);
|
|
|
1400
|
|
|
1401 /* closing the outstream could result in SIGPIPE, so ignore it. */
|
|
|
1402 old_sigpipe = (SIGTYPE (*) (int)) signal (SIGPIPE, SIG_IGN);
|
|
|
1403 usid = event_stream_delete_stream_pair (p->pipe_instream, p->pipe_outstream);
|
|
|
1404 signal (SIGPIPE, old_sigpipe);
|
|
|
1405
|
|
|
1406 UNIX_DATA(p)->infd = -1;
|
|
|
1407
|
|
|
1408 return usid;
|
|
|
1409 }
|
|
|
1410
|
|
442
|
1411 /* If the subtty field of the process data is not filled in, do so now. */
|
|
|
1412 static void
|
|
|
1413 try_to_initialize_subtty (struct unix_process_data *upd)
|
|
|
1414 {
|
|
|
1415 if (upd->pty_flag
|
|
444
|
1416 && (upd->subtty == -1 || ! isatty (upd->subtty))
|
|
442
|
1417 && STRINGP (upd->tty_name))
|
|
444
|
1418 upd->subtty = open ((char *) XSTRING_DATA (upd->tty_name), O_RDWR, 0);
|
|
442
|
1419 }
|
|
|
1420
|
|
|
1421 /* Send signal number SIGNO to PROCESS.
|
|
428
|
1422 CURRENT_GROUP means send to the process group that currently owns
|
|
|
1423 the terminal being used to communicate with PROCESS.
|
|
|
1424 This is used for various commands in shell mode.
|
|
|
1425 If NOMSG is zero, insert signal-announcements into process's buffers
|
|
|
1426 right away.
|
|
|
1427
|
|
|
1428 If we can, we try to signal PROCESS by sending control characters
|
|
|
1429 down the pty. This allows us to signal inferiors who have changed
|
|
442
|
1430 their uid, for which killpg would return an EPERM error,
|
|
|
1431 or processes running on other machines via remote login.
|
|
428
|
1432
|
|
442
|
1433 The method signals an error if the given SIGNO is not valid. */
|
|
428
|
1434
|
|
|
1435 static void
|
|
|
1436 unix_kill_child_process (Lisp_Object proc, int signo,
|
|
|
1437 int current_group, int nomsg)
|
|
|
1438 {
|
|
442
|
1439 pid_t pgid = -1;
|
|
440
|
1440 Lisp_Process *p = XPROCESS (proc);
|
|
442
|
1441 struct unix_process_data *d = UNIX_DATA (p);
|
|
428
|
1442
|
|
|
1443 switch (signo)
|
|
|
1444 {
|
|
|
1445 #ifdef SIGCONT
|
|
|
1446 case SIGCONT:
|
|
|
1447 p->status_symbol = Qrun;
|
|
|
1448 p->exit_code = 0;
|
|
|
1449 p->tick++;
|
|
|
1450 process_tick++;
|
|
|
1451 if (!nomsg)
|
|
|
1452 status_notify ();
|
|
|
1453 break;
|
|
|
1454 #endif /* ! defined (SIGCONT) */
|
|
|
1455 case SIGINT:
|
|
|
1456 case SIGQUIT:
|
|
|
1457 case SIGKILL:
|
|
442
|
1458 flush_pending_output (d->infd);
|
|
428
|
1459 break;
|
|
|
1460 }
|
|
|
1461
|
|
442
|
1462 if (! d->pty_flag)
|
|
|
1463 current_group = 0;
|
|
|
1464
|
|
|
1465 /* If current_group is true, we want to send a signal to the
|
|
|
1466 foreground process group of the terminal our child process is
|
|
|
1467 running on. You would think that would be easy.
|
|
|
1468
|
|
|
1469 The BSD people invented the TIOCPGRP ioctl to get the foreground
|
|
|
1470 process group of a tty. That, combined with killpg, gives us
|
|
|
1471 what we want.
|
|
|
1472
|
|
|
1473 However, the POSIX standards people, in their infinite wisdom,
|
|
|
1474 have seen fit to only allow this for processes which have the
|
|
|
1475 terminal as controlling terminal, which doesn't apply to us.
|
|
|
1476
|
|
|
1477 Sooo..., we have to do something non-standard. The ioctls
|
|
|
1478 TIOCSIGNAL, TIOCSIG, and TIOCSIGSEND send the signal directly on
|
|
|
1479 many systems. POSIX tcgetpgrp(), since it is *documented* as not
|
|
|
1480 doing what we want, is actually less likely to work than the BSD
|
|
|
1481 ioctl TIOCGPGRP it is supposed to obsolete. Sometimes we have to
|
|
|
1482 use TIOCGPGRP on the master end, sometimes the slave end
|
|
|
1483 (probably an AIX bug). So we better get a fd for the slave if we
|
|
444
|
1484 haven't got it yet.
|
|
|
1485
|
|
|
1486 Anal operating systems like SGI Irix and Compaq Tru64 adhere
|
|
|
1487 strictly to the letter of the law, so our hack doesn't work.
|
|
|
1488 The following fragment from an Irix header file is suggestive:
|
|
|
1489
|
|
|
1490 #ifdef __notdef__
|
|
|
1491 // this is not currently supported
|
|
|
1492 #define TIOCSIGNAL (tIOC|31) // pty: send signal to slave
|
|
|
1493 #endif
|
|
|
1494
|
|
|
1495 On those systems where none of our tricks work, we just fall back
|
|
|
1496 to the non-current_group behavior and kill the process group of
|
|
|
1497 the child.
|
|
|
1498 */
|
|
442
|
1499 if (current_group)
|
|
428
|
1500 {
|
|
442
|
1501 try_to_initialize_subtty (d);
|
|
|
1502
|
|
|
1503 #ifdef SIGNALS_VIA_CHARACTERS
|
|
|
1504 /* If possible, send signals to the entire pgrp
|
|
|
1505 by sending an input character to it. */
|
|
|
1506 {
|
|
|
1507 char sigchar = process_signal_char (d->subtty, signo);
|
|
|
1508 if (sigchar)
|
|
|
1509 {
|
|
|
1510 send_process (proc, Qnil, (Bufbyte *) &sigchar, 0, 1);
|
|
|
1511 return;
|
|
|
1512 }
|
|
|
1513 }
|
|
|
1514 #endif /* SIGNALS_VIA_CHARACTERS */
|
|
|
1515
|
|
|
1516 #ifdef TIOCGPGRP
|
|
|
1517 if (pgid == -1)
|
|
|
1518 ioctl (d->infd, TIOCGPGRP, &pgid); /* BSD */
|
|
|
1519 if (pgid == -1 && d->subtty != -1)
|
|
|
1520 ioctl (d->subtty, TIOCGPGRP, &pgid); /* Only this works on AIX! */
|
|
|
1521 #endif /* TIOCGPGRP */
|
|
|
1522
|
|
|
1523 if (pgid == -1)
|
|
428
|
1524 {
|
|
442
|
1525 /* Many systems provide an ioctl to send a signal directly */
|
|
|
1526 #ifdef TIOCSIGNAL /* Solaris, HP-UX */
|
|
|
1527 if (ioctl (d->infd, TIOCSIGNAL, signo) != -1)
|
|
|
1528 return;
|
|
|
1529 #endif /* TIOCSIGNAL */
|
|
|
1530
|
|
|
1531 #ifdef TIOCSIG /* BSD */
|
|
|
1532 if (ioctl (d->infd, TIOCSIG, signo) != -1)
|
|
|
1533 return;
|
|
|
1534 #endif /* TIOCSIG */
|
|
428
|
1535 }
|
|
442
|
1536 } /* current_group */
|
|
428
|
1537
|
|
442
|
1538 if (pgid == -1)
|
|
|
1539 /* Either current_group is 0, or we failed to get the foreground
|
|
|
1540 process group using the trickery above. So we fall back to
|
|
|
1541 sending the signal to the process group of our child process.
|
|
|
1542 Since this is often a shell that ignores signals like SIGINT,
|
|
|
1543 the shell's subprocess is killed, which is the desired effect.
|
|
|
1544 The process group of p->pid is always p->pid, since it was
|
|
|
1545 created as a process group leader. */
|
|
|
1546 pgid = XINT (p->pid);
|
|
|
1547
|
|
|
1548 /* Finally send the signal. */
|
|
|
1549 if (EMACS_KILLPG (pgid, signo) == -1)
|
|
458
|
1550 {
|
|
|
1551 /* It's not an error if our victim is already dead.
|
|
462
|
1552 And we can't rely on the result of killing a zombie, since
|
|
|
1553 XPG 4.2 requires that killing a zombie fail with ESRCH,
|
|
|
1554 while FIPS 151-2 requires that it succeeds! */
|
|
458
|
1555 #ifdef ESRCH
|
|
|
1556 if (errno != ESRCH)
|
|
|
1557 #endif
|
|
|
1558 error ("kill (%ld, %ld) failed: %s",
|
|
|
1559 (long) pgid, (long) signo, strerror (errno));
|
|
|
1560 }
|
|
428
|
1561 }
|
|
|
1562
|
|
442
|
1563 /* Send signal SIGCODE to any process in the system given its PID.
|
|
|
1564 Return zero if successful, a negative number upon failure. */
|
|
428
|
1565
|
|
|
1566 static int
|
|
|
1567 unix_kill_process_by_pid (int pid, int sigcode)
|
|
|
1568 {
|
|
|
1569 return kill (pid, sigcode);
|
|
|
1570 }
|
|
|
1571
|
|
442
|
1572 /* Return TTY name used to communicate with subprocess. */
|
|
428
|
1573
|
|
|
1574 static Lisp_Object
|
|
440
|
1575 unix_get_tty_name (Lisp_Process *p)
|
|
428
|
1576 {
|
|
|
1577 return UNIX_DATA (p)->tty_name;
|
|
|
1578 }
|
|
|
1579
|
|
442
|
1580 /* Canonicalize host name HOST, and return its canonical form.
|
|
|
1581 The default implementation just takes HOST for a canonical name. */
|
|
428
|
1582
|
|
|
1583 #ifdef HAVE_SOCKETS
|
|
|
1584 static Lisp_Object
|
|
|
1585 unix_canonicalize_host_name (Lisp_Object host)
|
|
|
1586 {
|
|
502
|
1587 #ifdef USE_GETADDRINFO
|
|
440
|
1588 struct addrinfo hints, *res;
|
|
|
1589 static char addrbuf[NI_MAXHOST];
|
|
|
1590 Lisp_Object canonname;
|
|
|
1591 int retval;
|
|
|
1592 char *ext_host;
|
|
|
1593
|
|
|
1594 xzero (hints);
|
|
|
1595 hints.ai_flags = AI_CANONNAME;
|
|
|
1596 hints.ai_family = AF_UNSPEC;
|
|
|
1597 hints.ai_socktype = SOCK_STREAM;
|
|
|
1598 hints.ai_protocol = 0;
|
|
442
|
1599 LISP_STRING_TO_EXTERNAL (host, ext_host, Qnative);
|
|
440
|
1600 retval = getaddrinfo (ext_host, NULL, &hints, &res);
|
|
|
1601 if (retval != 0)
|
|
|
1602 {
|
|
|
1603 char *gai_error;
|
|
|
1604
|
|
442
|
1605 EXTERNAL_TO_C_STRING (gai_strerror (retval), gai_error, Qnative);
|
|
440
|
1606 maybe_error (Qprocess, ERROR_ME_NOT,
|
|
|
1607 "%s \"%s\"", gai_error, XSTRING_DATA (host));
|
|
|
1608 canonname = host;
|
|
|
1609 }
|
|
|
1610 else
|
|
|
1611 {
|
|
|
1612 int gni = getnameinfo (res->ai_addr, res->ai_addrlen,
|
|
|
1613 addrbuf, sizeof(addrbuf),
|
|
|
1614 NULL, 0, NI_NUMERICHOST);
|
|
|
1615 canonname = gni ? host : build_ext_string (addrbuf, Qnative);
|
|
|
1616
|
|
|
1617 freeaddrinfo (res);
|
|
|
1618 }
|
|
|
1619
|
|
|
1620 return canonname;
|
|
502
|
1621 #else /* ! USE_GETADDRINFO */
|
|
428
|
1622 struct sockaddr_in address;
|
|
|
1623
|
|
|
1624 if (!get_internet_address (host, &address, ERROR_ME_NOT))
|
|
|
1625 return host;
|
|
|
1626
|
|
|
1627 if (address.sin_family == AF_INET)
|
|
|
1628 return build_string (inet_ntoa (address.sin_addr));
|
|
|
1629 else
|
|
|
1630 /* #### any clue what to do here? */
|
|
|
1631 return host;
|
|
502
|
1632 #endif /* ! USE_GETADDRINFO */
|
|
428
|
1633 }
|
|
|
1634
|
|
442
|
1635 /* Open a TCP network connection to a given HOST/SERVICE.
|
|
|
1636 Treated exactly like a normal process when reading and writing.
|
|
|
1637 Only differences are in status display and process deletion.
|
|
|
1638 A network connection has no PID; you cannot signal it. All you can
|
|
|
1639 do is deactivate and close it via delete-process. */
|
|
428
|
1640
|
|
|
1641 static void
|
|
502
|
1642 unix_open_network_stream (Lisp_Object name, Lisp_Object host,
|
|
|
1643 Lisp_Object service, Lisp_Object protocol,
|
|
|
1644 void **vinfd, void **voutfd)
|
|
428
|
1645 {
|
|
|
1646 int inch;
|
|
|
1647 int outch;
|
|
502
|
1648 volatile int s = -1;
|
|
428
|
1649 volatile int port;
|
|
|
1650 volatile int retry = 0;
|
|
502
|
1651 volatile int xerrno = 0;
|
|
|
1652 volatile int failed_connect = 0;
|
|
428
|
1653 int retval;
|
|
|
1654
|
|
|
1655 CHECK_STRING (host);
|
|
|
1656
|
|
|
1657 if (!EQ (protocol, Qtcp) && !EQ (protocol, Qudp))
|
|
442
|
1658 invalid_argument ("Unsupported protocol", protocol);
|
|
428
|
1659
|
|
440
|
1660 {
|
|
502
|
1661 #ifdef USE_GETADDRINFO
|
|
|
1662
|
|
440
|
1663 struct addrinfo hints, *res;
|
|
|
1664 struct addrinfo * volatile lres;
|
|
|
1665 char *portstring;
|
|
|
1666 char *ext_host;
|
|
|
1667 /*
|
|
|
1668 * Caution: service can either be a string or int.
|
|
|
1669 * Convert to a C string for later use by getaddrinfo.
|
|
|
1670 */
|
|
|
1671 if (INTP (service))
|
|
|
1672 {
|
|
|
1673 char portbuf[128];
|
|
|
1674 snprintf (portbuf, sizeof (portbuf), "%ld", (long) XINT (service));
|
|
|
1675 portstring = portbuf;
|
|
|
1676 port = htons ((unsigned short) XINT (service));
|
|
|
1677 }
|
|
|
1678 else
|
|
|
1679 {
|
|
|
1680 CHECK_STRING (service);
|
|
442
|
1681 LISP_STRING_TO_EXTERNAL (service, portstring, Qnative);
|
|
440
|
1682 port = 0;
|
|
|
1683 }
|
|
|
1684
|
|
|
1685 xzero (hints);
|
|
|
1686 hints.ai_flags = 0;
|
|
|
1687 hints.ai_family = AF_UNSPEC;
|
|
|
1688 if (EQ (protocol, Qtcp))
|
|
|
1689 hints.ai_socktype = SOCK_STREAM;
|
|
|
1690 else /* EQ (protocol, Qudp) */
|
|
|
1691 hints.ai_socktype = SOCK_DGRAM;
|
|
|
1692 hints.ai_protocol = 0;
|
|
442
|
1693 LISP_STRING_TO_EXTERNAL (host, ext_host, Qnative);
|
|
440
|
1694 retval = getaddrinfo (ext_host, portstring, &hints, &res);
|
|
|
1695 if (retval != 0)
|
|
|
1696 {
|
|
|
1697 char *gai_error;
|
|
|
1698
|
|
442
|
1699 EXTERNAL_TO_C_STRING (gai_strerror (retval), gai_error, Qnative);
|
|
440
|
1700 error ("%s/%s %s", XSTRING_DATA (host), portstring, gai_error);
|
|
|
1701 }
|
|
|
1702
|
|
|
1703 /* address loop */
|
|
|
1704 for (lres = res; lres ; lres = lres->ai_next)
|
|
|
1705
|
|
502
|
1706 #else /* !USE_GETADDRINFO */
|
|
440
|
1707
|
|
|
1708 struct sockaddr_in address;
|
|
502
|
1709 volatile int i;
|
|
440
|
1710
|
|
|
1711 if (INTP (service))
|
|
|
1712 port = htons ((unsigned short) XINT (service));
|
|
|
1713 else
|
|
|
1714 {
|
|
|
1715 struct servent *svc_info;
|
|
|
1716 CHECK_STRING (service);
|
|
|
1717
|
|
|
1718 if (EQ (protocol, Qtcp))
|
|
428
|
1719 svc_info = getservbyname ((char *) XSTRING_DATA (service), "tcp");
|
|
440
|
1720 else /* EQ (protocol, Qudp) */
|
|
428
|
1721 svc_info = getservbyname ((char *) XSTRING_DATA (service), "udp");
|
|
|
1722
|
|
440
|
1723 if (svc_info == 0)
|
|
442
|
1724 invalid_argument ("Unknown service", service);
|
|
440
|
1725 port = svc_info->s_port;
|
|
|
1726 }
|
|
428
|
1727
|
|
440
|
1728 get_internet_address (host, &address, ERROR_ME);
|
|
|
1729 address.sin_port = port;
|
|
428
|
1730
|
|
502
|
1731 /* use a trivial address loop */
|
|
|
1732 for (i = 0; i < 1; i++)
|
|
|
1733
|
|
|
1734 #endif /* !USE_GETADDRINFO */
|
|
|
1735 {
|
|
|
1736 #ifdef USE_GETADDRINFO
|
|
|
1737 int family = lres->ai_family;
|
|
|
1738 #else
|
|
|
1739 int family = address.sin_family;
|
|
|
1740 #endif
|
|
|
1741
|
|
|
1742 if (EQ (protocol, Qtcp))
|
|
|
1743 s = socket (family, SOCK_STREAM, 0);
|
|
|
1744 else /* EQ (protocol, Qudp) */
|
|
|
1745 s = socket (family, SOCK_DGRAM, 0);
|
|
|
1746
|
|
|
1747 if (s < 0)
|
|
|
1748 {
|
|
|
1749 xerrno = errno;
|
|
|
1750 failed_connect = 0;
|
|
|
1751 continue;
|
|
|
1752 }
|
|
|
1753
|
|
|
1754 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1755 /* Slow down polling. Some kernels have a bug which causes retrying
|
|
|
1756 connect to fail after a connect. (Note that the entire purpose
|
|
|
1757 for this code is a very old comment concerning an Ultrix bug that
|
|
|
1758 requires this code. We used to do this ALWAYS despite this!
|
|
|
1759 This messes up C-g out of connect() in a big way. So instead we
|
|
|
1760 just assume that anyone who sees such a kernel bug will define
|
|
|
1761 this constant, which for now is only defined under Ultrix.) --ben
|
|
|
1762 */
|
|
|
1763 slow_down_interrupts ();
|
|
|
1764 #endif
|
|
|
1765
|
|
|
1766 loop:
|
|
|
1767
|
|
|
1768 /* A system call interrupted with a SIGALRM or SIGIO comes back
|
|
|
1769 here, with can_break_system_calls reset to 0. */
|
|
|
1770 SETJMP (break_system_call_jump);
|
|
|
1771 if (QUITP)
|
|
|
1772 {
|
|
|
1773 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1774 speed_up_interrupts ();
|
|
|
1775 #endif
|
|
|
1776 REALLY_QUIT;
|
|
|
1777 /* In case something really weird happens ... */
|
|
|
1778 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1779 slow_down_interrupts ();
|
|
|
1780 #endif
|
|
|
1781 }
|
|
|
1782
|
|
|
1783 /* Break out of connect with a signal (it isn't otherwise possible).
|
|
|
1784 Thus you don't get screwed with a hung network. */
|
|
|
1785 can_break_system_calls = 1;
|
|
|
1786
|
|
|
1787 #ifdef USE_GETADDRINFO
|
|
|
1788 retval = connect (s, lres->ai_addr, lres->ai_addrlen);
|
|
|
1789 #else
|
|
|
1790 retval = connect (s, (struct sockaddr *) &address, sizeof (address));
|
|
|
1791 #endif
|
|
|
1792 can_break_system_calls = 0;
|
|
|
1793 if (retval == -1 && errno != EISCONN)
|
|
|
1794 {
|
|
|
1795 xerrno = errno;
|
|
|
1796 if (errno == EINTR)
|
|
|
1797 goto loop;
|
|
|
1798 if (errno == EADDRINUSE && retry < 20)
|
|
|
1799 {
|
|
|
1800 #ifdef __FreeBSD__
|
|
|
1801 /* A delay here is needed on some FreeBSD systems,
|
|
|
1802 and it is harmless, since this retrying takes
|
|
|
1803 time anyway and should be infrequent.
|
|
|
1804 `sleep-for' allowed for quitting this loop with
|
|
|
1805 interrupts slowed down so it can't be used
|
|
|
1806 here. Async timers should already be disabled
|
|
|
1807 at this point so we can use `sleep'.
|
|
|
1808
|
|
|
1809 (Again, this was not conditionalized on FreeBSD.
|
|
|
1810 Let's not mess up systems without the problem. --ben)
|
|
|
1811 */
|
|
|
1812 sleep (1);
|
|
|
1813 #endif
|
|
|
1814 retry++;
|
|
|
1815 goto loop;
|
|
|
1816 }
|
|
|
1817
|
|
|
1818 failed_connect = 1;
|
|
|
1819 close (s);
|
|
|
1820 s = -1;
|
|
|
1821
|
|
|
1822 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1823 speed_up_interrupts ();
|
|
|
1824 #endif
|
|
|
1825
|
|
|
1826 continue;
|
|
|
1827 }
|
|
|
1828
|
|
|
1829 #ifdef USE_GETADDRINFO
|
|
|
1830 if (port == 0)
|
|
|
1831 {
|
|
|
1832 int gni;
|
|
|
1833 char servbuf[NI_MAXSERV];
|
|
|
1834
|
|
|
1835 if (EQ (protocol, Qtcp))
|
|
|
1836 gni = getnameinfo (lres->ai_addr, lres->ai_addrlen,
|
|
|
1837 NULL, 0, servbuf, sizeof(servbuf),
|
|
|
1838 NI_NUMERICSERV);
|
|
|
1839 else /* EQ (protocol, Qudp) */
|
|
|
1840 gni = getnameinfo (lres->ai_addr, lres->ai_addrlen,
|
|
|
1841 NULL, 0, servbuf, sizeof(servbuf),
|
|
|
1842 NI_NUMERICSERV | NI_DGRAM);
|
|
|
1843
|
|
|
1844 if (gni == 0)
|
|
|
1845 port = strtol (servbuf, NULL, 10);
|
|
|
1846 }
|
|
|
1847
|
|
|
1848 break;
|
|
|
1849 #endif /* USE_GETADDRINFO */
|
|
|
1850 } /* address loop */
|
|
|
1851
|
|
|
1852 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
|
1853 speed_up_interrupts ();
|
|
|
1854 #endif
|
|
|
1855
|
|
|
1856 #ifdef USE_GETADDRINFO
|
|
|
1857 freeaddrinfo (res);
|
|
|
1858 #endif
|
|
428
|
1859
|
|
440
|
1860 if (s < 0)
|
|
502
|
1861 {
|
|
|
1862 errno = xerrno;
|
|
428
|
1863
|
|
502
|
1864 if (failed_connect)
|
|
|
1865 report_file_error ("connection failed", list2 (host, name));
|
|
|
1866 else
|
|
|
1867 report_file_error ("error creating socket", list1 (name));
|
|
440
|
1868 }
|
|
|
1869 }
|
|
428
|
1870
|
|
|
1871 inch = s;
|
|
|
1872 outch = dup (s);
|
|
|
1873 if (outch < 0)
|
|
|
1874 {
|
|
|
1875 close (s); /* this used to be leaked; from Kyle Jones */
|
|
|
1876 report_file_error ("error duplicating socket", list1 (name));
|
|
|
1877 }
|
|
|
1878
|
|
|
1879 set_socket_nonblocking_maybe (inch, port, "tcp");
|
|
|
1880
|
|
502
|
1881 *vinfd = (void *) inch;
|
|
|
1882 *voutfd = (void *) outch;
|
|
428
|
1883 }
|
|
|
1884
|
|
|
1885
|
|
|
1886 #ifdef HAVE_MULTICAST
|
|
|
1887
|
|
442
|
1888 /* Didier Verna <didier@xemacs.org> Nov. 28 1997.
|
|
428
|
1889
|
|
|
1890 This function is similar to open-network-stream-internal, but provides a
|
|
|
1891 mean to open an UDP multicast connection instead of a TCP one. Like in the
|
|
|
1892 TCP case, the multicast connection will be seen as a sub-process,
|
|
|
1893
|
|
|
1894 Some notes:
|
|
|
1895 - Normally, we should use sendto and recvfrom with non connected
|
|
|
1896 sockets. The current code doesn't allow us to do this. In the future, it
|
|
|
1897 would be a good idea to extend the process data structure in order to deal
|
|
|
1898 properly with the different types network connections.
|
|
|
1899 - For the same reason, when leaving a multicast group, it is better to make
|
|
|
1900 a setsockopt - IP_DROP_MEMBERSHIP before closing the descriptors.
|
|
|
1901 Unfortunately, this can't be done here because delete_process doesn't know
|
|
|
1902 about the kind of connection we have. However, this is not such an
|
|
|
1903 important issue.
|
|
|
1904 */
|
|
|
1905
|
|
|
1906 static void
|
|
442
|
1907 unix_open_multicast_group (Lisp_Object name, Lisp_Object dest,
|
|
|
1908 Lisp_Object port, Lisp_Object ttl, void** vinfd,
|
|
|
1909 void** voutfd)
|
|
428
|
1910 {
|
|
|
1911 struct ip_mreq imr;
|
|
|
1912 struct sockaddr_in sa;
|
|
|
1913 struct protoent *udp;
|
|
|
1914 int ws, rs;
|
|
|
1915 int theport;
|
|
|
1916 unsigned char thettl;
|
|
|
1917 int one = 1; /* For REUSEADDR */
|
|
|
1918 int ret;
|
|
|
1919 volatile int retry = 0;
|
|
|
1920
|
|
|
1921 CHECK_STRING (dest);
|
|
|
1922
|
|
|
1923 CHECK_NATNUM (port);
|
|
|
1924 theport = htons ((unsigned short) XINT (port));
|
|
|
1925
|
|
|
1926 CHECK_NATNUM (ttl);
|
|
|
1927 thettl = (unsigned char) XINT (ttl);
|
|
|
1928
|
|
|
1929 if ((udp = getprotobyname ("udp")) == NULL)
|
|
442
|
1930 type_error (Qinvalid_operation, "No info available for UDP protocol");
|
|
428
|
1931
|
|
|
1932 /* Init the sockets. Yes, I need 2 sockets. I couldn't duplicate one. */
|
|
|
1933 if ((rs = socket (PF_INET, SOCK_DGRAM, udp->p_proto)) < 0)
|
|
|
1934 report_file_error ("error creating socket", list1(name));
|
|
|
1935 if ((ws = socket (PF_INET, SOCK_DGRAM, udp->p_proto)) < 0)
|
|
|
1936 {
|
|
|
1937 close (rs);
|
|
|
1938 report_file_error ("error creating socket", list1(name));
|
|
|
1939 }
|
|
|
1940
|
|
|
1941 /* This will be used for both sockets */
|
|
|
1942 memset (&sa, 0, sizeof(sa));
|
|
|
1943 sa.sin_family = AF_INET;
|
|
|
1944 sa.sin_port = theport;
|
|
|
1945 sa.sin_addr.s_addr = htonl (inet_addr ((char *) XSTRING_DATA (dest)));
|
|
|
1946
|
|
|
1947 /* Socket configuration for reading ------------------------ */
|
|
|
1948
|
|
|
1949 /* Multiple connections from the same machine. This must be done before
|
|
|
1950 bind. If it fails, it shouldn't be fatal. The only consequence is that
|
|
|
1951 people won't be able to connect twice from the same machine. */
|
|
|
1952 if (setsockopt (rs, SOL_SOCKET, SO_REUSEADDR, (char *) &one, sizeof (one))
|
|
|
1953 < 0)
|
|
|
1954 warn_when_safe (Qmulticast, Qwarning, "Cannot reuse socket address");
|
|
|
1955
|
|
|
1956 /* bind socket name */
|
|
|
1957 if (bind (rs, (struct sockaddr *)&sa, sizeof(sa)))
|
|
|
1958 {
|
|
|
1959 close (rs);
|
|
|
1960 close (ws);
|
|
|
1961 report_file_error ("error binding socket", list2(name, port));
|
|
|
1962 }
|
|
|
1963
|
|
|
1964 /* join multicast group */
|
|
|
1965 imr.imr_multiaddr.s_addr = htonl (inet_addr ((char *) XSTRING_DATA (dest)));
|
|
|
1966 imr.imr_interface.s_addr = htonl (INADDR_ANY);
|
|
|
1967 if (setsockopt (rs, IPPROTO_IP, IP_ADD_MEMBERSHIP,
|
|
442
|
1968 &imr, sizeof (struct ip_mreq)) < 0)
|
|
428
|
1969 {
|
|
|
1970 close (ws);
|
|
|
1971 close (rs);
|
|
|
1972 report_file_error ("error adding membership", list2(name, dest));
|
|
|
1973 }
|
|
|
1974
|
|
|
1975 /* Socket configuration for writing ----------------------- */
|
|
|
1976
|
|
|
1977 /* Normally, there's no 'connect' in multicast, since we prefer to use
|
|
|
1978 'sendto' and 'recvfrom'. However, in order to handle this connection in
|
|
|
1979 the process-like way it is done for TCP, we must be able to use 'write'
|
|
|
1980 instead of 'sendto'. Consequently, we 'connect' this socket. */
|
|
|
1981
|
|
|
1982 /* See open-network-stream-internal for comments on this part of the code */
|
|
502
|
1983 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
1984 slow_down_interrupts ();
|
|
502
|
1985 #endif
|
|
428
|
1986
|
|
|
1987 loop:
|
|
|
1988
|
|
|
1989 /* A system call interrupted with a SIGALRM or SIGIO comes back
|
|
|
1990 here, with can_break_system_calls reset to 0. */
|
|
|
1991 SETJMP (break_system_call_jump);
|
|
|
1992 if (QUITP)
|
|
|
1993 {
|
|
502
|
1994 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
1995 speed_up_interrupts ();
|
|
502
|
1996 #endif
|
|
428
|
1997 REALLY_QUIT;
|
|
|
1998 /* In case something really weird happens ... */
|
|
502
|
1999 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2000 slow_down_interrupts ();
|
|
502
|
2001 #endif
|
|
428
|
2002 }
|
|
|
2003
|
|
|
2004 /* Break out of connect with a signal (it isn't otherwise possible).
|
|
|
2005 Thus you don't get screwed with a hung network. */
|
|
|
2006 can_break_system_calls = 1;
|
|
|
2007 ret = connect (ws, (struct sockaddr *) &sa, sizeof (sa));
|
|
|
2008 can_break_system_calls = 0;
|
|
|
2009 if (ret == -1 && errno != EISCONN)
|
|
|
2010 {
|
|
|
2011 int xerrno = errno;
|
|
|
2012
|
|
|
2013 if (errno == EINTR)
|
|
|
2014 goto loop;
|
|
|
2015 if (errno == EADDRINUSE && retry < 20)
|
|
|
2016 {
|
|
|
2017 /* A delay here is needed on some FreeBSD systems,
|
|
|
2018 and it is harmless, since this retrying takes time anyway
|
|
|
2019 and should be infrequent.
|
|
|
2020 `sleep-for' allowed for quitting this loop with interrupts
|
|
|
2021 slowed down so it can't be used here. Async timers should
|
|
|
2022 already be disabled at this point so we can use `sleep'. */
|
|
|
2023 sleep (1);
|
|
|
2024 retry++;
|
|
|
2025 goto loop;
|
|
|
2026 }
|
|
|
2027
|
|
|
2028 close (rs);
|
|
|
2029 close (ws);
|
|
502
|
2030 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2031 speed_up_interrupts ();
|
|
502
|
2032 #endif
|
|
428
|
2033
|
|
|
2034 errno = xerrno;
|
|
|
2035 report_file_error ("error connecting socket", list2(name, port));
|
|
|
2036 }
|
|
|
2037
|
|
502
|
2038 #ifdef CONNECT_NEEDS_SLOWED_INTERRUPTS
|
|
428
|
2039 speed_up_interrupts ();
|
|
502
|
2040 #endif
|
|
428
|
2041
|
|
|
2042 /* scope */
|
|
|
2043 if (setsockopt (ws, IPPROTO_IP, IP_MULTICAST_TTL,
|
|
442
|
2044 &thettl, sizeof (thettl)) < 0)
|
|
428
|
2045 {
|
|
|
2046 close (rs);
|
|
|
2047 close (ws);
|
|
|
2048 report_file_error ("error setting ttl", list2(name, ttl));
|
|
|
2049 }
|
|
|
2050
|
|
|
2051 set_socket_nonblocking_maybe (rs, theport, "udp");
|
|
|
2052
|
|
|
2053 *vinfd = (void*)rs;
|
|
|
2054 *voutfd = (void*)ws;
|
|
|
2055 }
|
|
|
2056
|
|
|
2057 #endif /* HAVE_MULTICAST */
|
|
|
2058
|
|
|
2059 #endif /* HAVE_SOCKETS */
|
|
|
2060
|
|
|
2061
|
|
|
2062 /**********************************************************************/
|
|
|
2063 /* Initialization */
|
|
|
2064 /**********************************************************************/
|
|
|
2065
|
|
|
2066 void
|
|
|
2067 process_type_create_unix (void)
|
|
|
2068 {
|
|
|
2069 PROCESS_HAS_METHOD (unix, alloc_process_data);
|
|
|
2070 PROCESS_HAS_METHOD (unix, mark_process_data);
|
|
|
2071 #ifdef SIGCHLD
|
|
|
2072 PROCESS_HAS_METHOD (unix, init_process);
|
|
|
2073 PROCESS_HAS_METHOD (unix, reap_exited_processes);
|
|
|
2074 #endif
|
|
|
2075 PROCESS_HAS_METHOD (unix, init_process_io_handles);
|
|
|
2076 PROCESS_HAS_METHOD (unix, create_process);
|
|
|
2077 PROCESS_HAS_METHOD (unix, tooltalk_connection_p);
|
|
|
2078 PROCESS_HAS_METHOD (unix, set_window_size);
|
|
|
2079 #ifdef HAVE_WAITPID
|
|
|
2080 PROCESS_HAS_METHOD (unix, update_status_if_terminated);
|
|
|
2081 #endif
|
|
|
2082 PROCESS_HAS_METHOD (unix, send_process);
|
|
|
2083 PROCESS_HAS_METHOD (unix, process_send_eof);
|
|
|
2084 PROCESS_HAS_METHOD (unix, deactivate_process);
|
|
|
2085 PROCESS_HAS_METHOD (unix, kill_child_process);
|
|
|
2086 PROCESS_HAS_METHOD (unix, kill_process_by_pid);
|
|
|
2087 PROCESS_HAS_METHOD (unix, get_tty_name);
|
|
|
2088 #ifdef HAVE_SOCKETS
|
|
|
2089 PROCESS_HAS_METHOD (unix, canonicalize_host_name);
|
|
|
2090 PROCESS_HAS_METHOD (unix, open_network_stream);
|
|
|
2091 #ifdef HAVE_MULTICAST
|
|
|
2092 PROCESS_HAS_METHOD (unix, open_multicast_group);
|
|
|
2093 #endif
|
|
|
2094 #endif
|
|
|
2095 }
|
|
|
2096
|
|
|
2097 void
|
|
|
2098 vars_of_process_unix (void)
|
|
|
2099 {
|
|
|
2100 Fprovide (intern ("unix-processes"));
|
|
|
2101 }
|
|
|
2102
|
|
|
2103 #endif /* !defined (NO_SUBPROCESSES) */
|
