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dcfdbac7 JB |
1 | /* Interfaces to subprocesses on VMS. |
2 | Copyright (C) 1988 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | /* | |
22 | Event flag and `select' emulation | |
23 | ||
24 | 0 is never used | |
25 | 1 is the terminal | |
26 | 23 is the timer event flag | |
27 | 24-31 are reserved by VMS | |
28 | */ | |
29 | #include <ssdef.h> | |
30 | #include <iodef.h> | |
31 | #include <dvidef.h> | |
32 | #include <clidef.h> | |
33 | #include "vmsproc.h" | |
34 | ||
35 | #define KEYBOARD_EVENT_FLAG 1 | |
36 | #define TIMER_EVENT_FLAG 23 | |
37 | ||
38 | static VMS_PROC_STUFF procList[MAX_EVENT_FLAGS+1]; | |
39 | ||
40 | get_kbd_event_flag () | |
41 | { | |
42 | /* | |
43 | Return the first event flag for keyboard input. | |
44 | */ | |
45 | VMS_PROC_STUFF *vs = &procList[KEYBOARD_EVENT_FLAG]; | |
46 | ||
47 | vs->busy = 1; | |
48 | vs->pid = 0; | |
49 | return (vs->eventFlag); | |
50 | } | |
51 | ||
52 | get_timer_event_flag () | |
53 | { | |
54 | /* | |
55 | Return the last event flag for use by timeouts | |
56 | */ | |
57 | VMS_PROC_STUFF *vs = &procList[TIMER_EVENT_FLAG]; | |
58 | ||
59 | vs->busy = 1; | |
60 | vs->pid = 0; | |
61 | return (vs->eventFlag); | |
62 | } | |
63 | ||
64 | VMS_PROC_STUFF * | |
65 | get_vms_process_stuff () | |
66 | { | |
67 | /* | |
68 | Return a process_stuff structure | |
69 | ||
70 | We use 1-23 as our event flags to simplify implementing | |
71 | a VMS `select' call. | |
72 | */ | |
73 | int i; | |
74 | VMS_PROC_STUFF *vs; | |
75 | ||
76 | for (i=1, vs = procList; i<MAX_EVENT_FLAGS; i++, vs++) | |
77 | { | |
78 | if (!vs->busy) | |
79 | { | |
80 | vs->busy = 1; | |
81 | vs->inputChan = 0; | |
82 | vs->pid = 0; | |
83 | sys$clref (vs->eventFlag); | |
84 | return (vs); | |
85 | } | |
86 | } | |
87 | return ((VMS_PROC_STUFF *)0); | |
88 | } | |
89 | ||
90 | give_back_vms_process_stuff (vs) | |
91 | VMS_PROC_STUFF *vs; | |
92 | { | |
93 | /* | |
94 | Return an event flag to our pool | |
95 | */ | |
96 | vs->busy = 0; | |
97 | vs->inputChan = 0; | |
98 | vs->pid = 0; | |
99 | } | |
100 | ||
101 | VMS_PROC_STUFF * | |
102 | get_vms_process_pointer (pid) | |
103 | int pid; | |
104 | { | |
105 | /* | |
106 | Given a pid, return the VMS_STUFF pointer | |
107 | */ | |
108 | int i; | |
109 | VMS_PROC_STUFF *vs; | |
110 | ||
111 | /* Don't search the last one */ | |
112 | for (i=0, vs=procList; i<MAX_EVENT_FLAGS; i++, vs++) | |
113 | { | |
114 | if (vs->busy && vs->pid == pid) | |
115 | return (vs); | |
116 | } | |
117 | return ((VMS_PROC_STUFF *)0); | |
118 | } | |
119 | ||
120 | start_vms_process_read (vs) | |
121 | VMS_PROC_STUFF *vs; | |
122 | { | |
123 | /* | |
124 | Start an asynchronous read on a VMS process | |
125 | We will catch up with the output sooner or later | |
126 | */ | |
127 | int status; | |
128 | int ProcAst (); | |
129 | ||
130 | status = sys$qio (vs->eventFlag, vs->outputChan, IO$_READVBLK, | |
131 | vs->iosb, 0, vs, | |
132 | vs->inputBuffer, sizeof (vs->inputBuffer), 0, 0, 0, 0); | |
133 | if (status != SS$_NORMAL) | |
134 | return (0); | |
135 | else | |
136 | return (1); | |
137 | } | |
138 | ||
139 | extern int waiting_for_ast; /* in sysdep.c */ | |
140 | extern int timer_ef; | |
141 | extern int input_ef; | |
142 | ||
143 | select (nDesc, rdsc, wdsc, edsc, timeOut) | |
144 | int nDesc; | |
145 | int *rdsc; | |
146 | int *wdsc; | |
147 | int *edsc; | |
148 | int *timeOut; | |
149 | { | |
150 | /* Emulate a select call | |
151 | ||
152 | We know that we only use event flags 1-23 | |
153 | ||
154 | timeout == 100000 & bit 0 set means wait on keyboard input until | |
155 | something shows up. If timeout == 0, we just read the event | |
156 | flags and return what we find. */ | |
157 | ||
158 | int nfds = 0; | |
159 | int status; | |
160 | int time[2]; | |
161 | int delta = -10000000; | |
162 | int zero = 0; | |
163 | int timeout = *timeOut; | |
164 | unsigned long mask, readMask, waitMask; | |
165 | ||
166 | if (rdsc) | |
167 | readMask = *rdsc << 1; /* Unix mask is shifted over 1 */ | |
168 | else | |
169 | readMask = 0; /* Must be a wait call */ | |
170 | ||
171 | sys$clref (KEYBOARD_EVENT_FLAG); | |
172 | sys$setast (0); /* Block interrupts */ | |
173 | sys$readef (KEYBOARD_EVENT_FLAG, &mask); /* See what is set */ | |
174 | mask &= readMask; /* Just examine what we need */ | |
175 | if (mask == 0) | |
176 | { /* Nothing set, we must wait */ | |
177 | if (timeout != 0) | |
178 | { /* Not just inspecting... */ | |
179 | if (!(timeout == 100000 && | |
180 | readMask == (1 << KEYBOARD_EVENT_FLAG))) | |
181 | { | |
182 | lib$emul (&timeout, &delta, &zero, time); | |
183 | sys$setimr (TIMER_EVENT_FLAG, time, 0, 1); | |
184 | waitMask = readMask | (1 << TIMER_EVENT_FLAG); | |
185 | } | |
186 | else | |
187 | waitMask = readMask; | |
188 | if (waitMask & (1 << KEYBOARD_EVENT_FLAG)) | |
189 | { | |
190 | sys$clref (KEYBOARD_EVENT_FLAG); | |
191 | waiting_for_ast = 1; /* Only if reading from 0 */ | |
192 | } | |
193 | sys$setast (1); | |
194 | sys$wflor (KEYBOARD_EVENT_FLAG, waitMask); | |
195 | sys$cantim (1, 0); | |
196 | sys$readef (KEYBOARD_EVENT_FLAG, &mask); | |
197 | if (readMask & (1 << KEYBOARD_EVENT_FLAG)) | |
198 | waiting_for_ast = 0; | |
199 | } | |
200 | } | |
201 | sys$setast (1); | |
202 | ||
203 | /* | |
204 | Count number of descriptors that are ready | |
205 | */ | |
206 | mask &= readMask; | |
207 | if (rdsc) | |
208 | *rdsc = (mask >> 1); /* Back to Unix format */ | |
209 | for (nfds = 0; mask; mask >>= 1) | |
210 | { | |
211 | if (mask & 1) | |
212 | nfds++; | |
213 | } | |
214 | return (nfds); | |
215 | } | |
216 | ||
217 | #define MAX_BUFF 1024 | |
218 | ||
219 | write_to_vms_process (vs, buf, len) | |
220 | VMS_PROC_STUFF *vs; | |
221 | char *buf; | |
222 | int len; | |
223 | { | |
224 | /* | |
225 | Write something to a VMS process. | |
226 | ||
227 | We have to map newlines to carriage returns for VMS. | |
228 | */ | |
229 | char ourBuff[MAX_BUFF]; | |
230 | short iosb[4]; | |
231 | int status; | |
232 | int in, out; | |
233 | ||
234 | while (len > 0) | |
235 | { | |
236 | out = map_nl_to_cr (buf, ourBuff, len, MAX_BUFF); | |
237 | status = sys$qiow (0, vs->inputChan, IO$_WRITEVBLK|IO$M_NOFORMAT, | |
238 | iosb, 0, 0, ourBuff, out, 0, 0, 0, 0); | |
239 | if (status != SS$_NORMAL || (status = iosb[0]) != SS$_NORMAL) | |
240 | { | |
241 | error ("Could not write to subprocess: %x", status); | |
242 | return (0); | |
243 | } | |
244 | len =- out; | |
245 | } | |
246 | return (1); | |
247 | } | |
248 | ||
249 | static | |
250 | map_nl_to_cr (in, out, maxIn, maxOut) | |
251 | char *in; | |
252 | char *out; | |
253 | int maxIn; | |
254 | int maxOut; | |
255 | { | |
256 | /* | |
257 | Copy `in' to `out' remapping `\n' to `\r' | |
258 | */ | |
259 | int c; | |
260 | int o; | |
261 | ||
262 | for (o=0; maxIn-- > 0 && o < maxOut; o++) | |
263 | { | |
264 | c = *in++; | |
265 | *out++ = (c == '\n') ? '\r' : c; | |
266 | } | |
267 | return (o); | |
268 | } | |
269 | ||
270 | clean_vms_buffer (buf, len) | |
271 | char *buf; | |
272 | int len; | |
273 | { | |
274 | /* | |
275 | Sanitize output from a VMS subprocess | |
276 | Strip CR's and NULLs | |
277 | */ | |
278 | char *oBuf = buf; | |
279 | char c; | |
280 | int l = 0; | |
281 | ||
282 | while (len-- > 0) | |
283 | { | |
284 | c = *buf++; | |
285 | if (c == '\r' || c == '\0') | |
286 | ; | |
287 | else | |
288 | { | |
289 | *oBuf++ = c; | |
290 | l++; | |
291 | } | |
292 | } | |
293 | return (l); | |
294 | } | |
295 | ||
296 | /* | |
297 | For the CMU PTY driver | |
298 | */ | |
299 | #define PTYNAME "PYA0:" | |
300 | ||
301 | get_pty_channel (inDevName, outDevName, inChannel, outChannel) | |
302 | char *inDevName; | |
303 | char *outDevName; | |
304 | int *inChannel; | |
305 | int *outChannel; | |
306 | { | |
307 | int PartnerUnitNumber; | |
308 | int status; | |
309 | struct { | |
310 | int l; | |
311 | char *a; | |
312 | } d; | |
313 | struct { | |
314 | short BufLen; | |
315 | short ItemCode; | |
316 | int *BufAddress; | |
317 | int *ItemLength; | |
318 | } g[2]; | |
319 | ||
320 | d.l = strlen (PTYNAME); | |
321 | d.a = PTYNAME; | |
322 | *inChannel = 0; /* Should be `short' on VMS */ | |
323 | *outChannel = 0; | |
324 | *inDevName = *outDevName = '\0'; | |
325 | status = sys$assign (&d, inChannel, 0, 0); | |
326 | if (status == SS$_NORMAL) | |
327 | { | |
328 | *outChannel = *inChannel; | |
329 | g[0].BufLen = sizeof (PartnerUnitNumber); | |
330 | g[0].ItemCode = DVI$_UNIT; | |
331 | g[0].BufAddress = &PartnerUnitNumber; | |
332 | g[0].ItemLength = (int *)0; | |
333 | g[1].BufLen = g[1].ItemCode = 0; | |
334 | status = sys$getdviw (0, *inChannel, 0, &g, 0, 0, 0, 0); | |
335 | if (status == SS$_NORMAL) | |
336 | { | |
337 | sprintf (inDevName, "_TPA%d:", PartnerUnitNumber); | |
338 | strcpy (outDevName, inDevName); | |
339 | } | |
340 | } | |
341 | return (status); | |
342 | } | |
343 | ||
344 | VMSgetwd (buf) | |
345 | char *buf; | |
346 | { | |
347 | /* | |
348 | Return the current directory | |
349 | */ | |
350 | char curdir[256]; | |
351 | char *getenv (); | |
352 | char *s; | |
353 | short len; | |
354 | int status; | |
355 | struct | |
356 | { | |
357 | int l; | |
358 | char *a; | |
359 | } d; | |
360 | ||
361 | s = getenv ("SYS$DISK"); | |
362 | if (s) | |
363 | strcpy (buf, s); | |
364 | else | |
365 | *buf = '\0'; | |
366 | ||
367 | d.l = 255; | |
368 | d.a = curdir; | |
369 | status = sys$setddir (0, &len, &d); | |
370 | if (status & 1) | |
371 | { | |
372 | curdir[len] = '\0'; | |
373 | strcat (buf, curdir); | |
374 | } | |
375 | } | |
376 | \f | |
377 | static | |
378 | call_process_ast (vs) | |
379 | VMS_PROC_STUFF *vs; | |
380 | { | |
381 | sys$setef (vs->eventFlag); | |
382 | } | |
383 | ||
384 | void | |
385 | child_setup (in, out, err, new_argv, env) | |
386 | int in, out, err; | |
387 | register char **new_argv; | |
388 | char **env; | |
389 | { | |
390 | /* ??? I suspect that maybe this shouldn't be done on VMS. */ | |
391 | #ifdef subprocesses | |
392 | /* Close Emacs's descriptors that this process should not have. */ | |
393 | close_process_descs (); | |
394 | #endif | |
395 | ||
396 | if (XTYPE (current_buffer->directory) == Lisp_String) | |
397 | chdir (XSTRING (current_buffer->directory)->data); | |
398 | } | |
399 | ||
400 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
401 | "Call PROGRAM synchronously in a separate process.\n\ | |
402 | Program's input comes from file INFILE (nil means null device, `NLA0:').\n\ | |
403 | Insert output in BUFFER before point; t means current buffer;\n\ | |
404 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
405 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ | |
406 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
407 | This function waits for PROGRAM to terminate, unless BUFFER is 0;\n\ | |
408 | if you quit, the process is killed.") | |
409 | (nargs, args) | |
410 | int nargs; | |
411 | register Lisp_Object *args; | |
412 | { | |
413 | Lisp_Object display, buffer, path; | |
414 | char oldDir[512]; | |
415 | int inchannel, outchannel; | |
416 | int len; | |
417 | int call_process_ast (); | |
418 | struct | |
419 | { | |
420 | int l; | |
421 | char *a; | |
422 | } dcmd, din, dout; | |
423 | char inDevName[65]; | |
424 | char outDevName[65]; | |
425 | short iosb[4]; | |
426 | int status; | |
427 | int SpawnFlags = CLI$M_NOWAIT; | |
428 | VMS_PROC_STUFF *vs; | |
429 | VMS_PROC_STUFF *get_vms_process_stuff (); | |
430 | int fd[2]; | |
431 | int filefd; | |
432 | register int pid; | |
433 | char buf[1024]; | |
434 | int count = specpdl_ptr - specpdl; | |
435 | register unsigned char **new_argv; | |
436 | struct buffer *old = current_buffer; | |
437 | ||
438 | CHECK_STRING (args[0], 0); | |
439 | ||
d427b66a | 440 | if (nargs <= 1 || NILP (args[1])) |
dcfdbac7 JB |
441 | args[1] = build_string ("NLA0:"); |
442 | else | |
443 | args[1] = Fexpand_file_name (args[1], current_buffer->directory); | |
444 | ||
445 | CHECK_STRING (args[1], 1); | |
446 | ||
447 | { | |
448 | register Lisp_Object tem; | |
449 | buffer = tem = args[2]; | |
450 | if (nargs <= 2) | |
451 | buffer = Qnil; | |
452 | else if (!(EQ (tem, Qnil) || EQ (tem, Qt) | |
453 | || XFASTINT (tem) == 0)) | |
454 | { | |
455 | buffer = Fget_buffer (tem); | |
456 | CHECK_BUFFER (buffer, 2); | |
457 | } | |
458 | } | |
459 | ||
460 | display = nargs >= 3 ? args[3] : Qnil; | |
461 | ||
462 | { | |
463 | /* | |
464 | if (args[0] == "*dcl*" then we need to skip pas the "-c", | |
465 | else args[0] is the program to run. | |
466 | */ | |
467 | register int i; | |
468 | int arg0; | |
469 | int firstArg; | |
470 | ||
471 | if (strcmp (XSTRING (args[0])->data, "*dcl*") == 0) | |
472 | { | |
473 | arg0 = 5; | |
474 | firstArg = 6; | |
475 | } | |
476 | else | |
477 | { | |
478 | arg0 = 0; | |
479 | firstArg = 4; | |
480 | } | |
481 | len = XSTRING (args[arg0])->size + 1; | |
482 | for (i = firstArg; i < nargs; i++) | |
483 | { | |
484 | CHECK_STRING (args[i], i); | |
485 | len += XSTRING (args[i])->size + 1; | |
486 | } | |
487 | new_argv = alloca (len); | |
488 | strcpy (new_argv, XSTRING (args[arg0])->data); | |
489 | for (i = firstArg; i < nargs; i++) | |
490 | { | |
491 | strcat (new_argv, " "); | |
492 | strcat (new_argv, XSTRING (args[i])->data); | |
493 | } | |
494 | dcmd.l = len-1; | |
495 | dcmd.a = new_argv; | |
496 | ||
497 | status = get_pty_channel (inDevName, outDevName, &inchannel, &outchannel); | |
498 | if (!(status & 1)) | |
499 | error ("Error getting PTY channel: %x", status); | |
500 | if (XTYPE (buffer) == Lisp_Int) | |
501 | { | |
502 | dout.l = strlen ("NLA0:"); | |
503 | dout.a = "NLA0:"; | |
504 | } | |
505 | else | |
506 | { | |
507 | dout.l = strlen (outDevName); | |
508 | dout.a = outDevName; | |
509 | } | |
510 | ||
511 | vs = get_vms_process_stuff (); | |
512 | if (!vs) | |
513 | { | |
514 | sys$dassgn (inchannel); | |
515 | sys$dassgn (outchannel); | |
516 | error ("Too many VMS processes"); | |
517 | } | |
518 | vs->inputChan = inchannel; | |
519 | vs->outputChan = outchannel; | |
520 | } | |
521 | ||
522 | filefd = open (XSTRING (args[1])->data, O_RDONLY, 0); | |
523 | if (filefd < 0) | |
524 | { | |
525 | sys$dassgn (inchannel); | |
526 | sys$dassgn (outchannel); | |
527 | give_back_vms_process_stuff (vs); | |
528 | report_file_error ("Opening process input file", Fcons (args[1], Qnil)); | |
529 | } | |
530 | else | |
531 | close (filefd); | |
532 | ||
533 | din.l = XSTRING (args[1])->size; | |
534 | din.a = XSTRING (args[1])->data; | |
535 | ||
536 | /* | |
537 | Start a read on the process channel | |
538 | */ | |
539 | if (XTYPE (buffer) != Lisp_Int) | |
540 | { | |
541 | start_vms_process_read (vs); | |
542 | SpawnFlags = CLI$M_NOWAIT; | |
543 | } | |
544 | else | |
545 | SpawnFlags = 0; | |
546 | ||
547 | /* | |
548 | On VMS we need to change the current directory | |
549 | of the parent process before forking so that | |
550 | the child inherit that directory. We remember | |
551 | where we were before changing. | |
552 | */ | |
553 | VMSgetwd (oldDir); | |
554 | child_setup (0, 0, 0, 0, 0); | |
555 | status = lib$spawn (&dcmd, &din, &dout, &SpawnFlags, 0, &vs->pid, | |
556 | &vs->exitStatus, 0, call_process_ast, vs); | |
557 | chdir (oldDir); | |
558 | ||
559 | if (status != SS$_NORMAL) | |
560 | { | |
561 | sys$dassgn (inchannel); | |
562 | sys$dassgn (outchannel); | |
563 | give_back_vms_process_stuff (vs); | |
564 | error ("Error calling LIB$SPAWN: %x", status); | |
565 | } | |
566 | pid = vs->pid; | |
567 | ||
568 | if (XTYPE (buffer) == Lisp_Int) | |
569 | { | |
570 | #ifndef subprocesses | |
571 | wait_without_blocking (); | |
572 | #endif subprocesses | |
573 | return Qnil; | |
574 | } | |
575 | ||
576 | record_unwind_protect (call_process_cleanup, | |
577 | Fcons (make_number (fd[0]), make_number (pid))); | |
578 | ||
579 | ||
580 | if (XTYPE (buffer) == Lisp_Buffer) | |
581 | Fset_buffer (buffer); | |
582 | ||
583 | immediate_quit = 1; | |
584 | QUIT; | |
585 | ||
586 | while (1) | |
587 | { | |
588 | sys$waitfr (vs->eventFlag); | |
589 | if (vs->iosb[0] & 1) | |
590 | { | |
591 | immediate_quit = 0; | |
d427b66a | 592 | if (!NILP (buffer)) |
dcfdbac7 JB |
593 | { |
594 | vs->iosb[1] = clean_vms_buffer (vs->inputBuffer, vs->iosb[1]); | |
595 | InsCStr (vs->inputBuffer, vs->iosb[1]); | |
596 | } | |
d427b66a | 597 | if (!NILP (display) && INTERACTIVE) |
dcfdbac7 JB |
598 | redisplay_preserve_echo_area (); |
599 | immediate_quit = 1; | |
600 | QUIT; | |
601 | if (!start_vms_process_read (vs)) | |
602 | break; /* The other side went away */ | |
603 | } | |
604 | else | |
605 | break; | |
606 | } | |
607 | sys$dassgn (inchannel); | |
608 | sys$dassgn (outchannel); | |
609 | give_back_vms_process_stuff (vs); | |
610 | ||
611 | /* Wait for it to terminate, unless it already has. */ | |
612 | wait_for_termination (pid); | |
613 | ||
614 | immediate_quit = 0; | |
615 | ||
616 | set_current_buffer (old); | |
617 | ||
1f924f99 | 618 | return unbind_to (count, Qnil); |
dcfdbac7 JB |
619 | } |
620 | ||
621 | create_process (process, new_argv) | |
622 | Lisp_Object process; | |
623 | char *new_argv; | |
624 | { | |
625 | int pid, inchannel, outchannel, forkin, forkout; | |
626 | char old_dir[512]; | |
627 | char in_dev_name[65]; | |
628 | char out_dev_name[65]; | |
629 | short iosb[4]; | |
630 | int status; | |
631 | int spawn_flags = CLI$M_NOWAIT; | |
632 | int child_sig (); | |
633 | struct { | |
634 | int l; | |
635 | char *a; | |
636 | } din, dout, dprompt, dcmd; | |
637 | VMS_PROC_STUFF *vs; | |
638 | VMS_PROC_STUFF *get_vms_process_stuff (); | |
639 | ||
640 | status = get_pty_channel (in_dev_name, out_dev_name, &inchannel, &outchannel); | |
641 | if (!(status & 1)) | |
642 | { | |
643 | remove_process (process); | |
644 | error ("Error getting PTY channel: %x", status); | |
645 | } | |
646 | dout.l = strlen (out_dev_name); | |
647 | dout.a = out_dev_name; | |
648 | dprompt.l = strlen (DCL_PROMPT); | |
649 | dprompt.a = DCL_PROMPT; | |
650 | ||
651 | if (strcmp (new_argv, "*dcl*") == 0) | |
652 | { | |
653 | din.l = strlen (in_dev_name); | |
654 | din.a = in_dev_name; | |
655 | dcmd.l = 0; | |
656 | dcmd.a = (char *)0; | |
657 | } | |
658 | else | |
659 | { | |
660 | din.l = strlen ("NLA0:"); | |
661 | din.a = "NLA0:"; | |
662 | dcmd.l = strlen (new_argv); | |
663 | dcmd.a = new_argv; | |
664 | } | |
665 | ||
666 | /* Delay interrupts until we have a chance to store | |
667 | the new fork's pid in its process structure */ | |
668 | sys$setast (0); | |
669 | ||
670 | vs = get_vms_process_stuff (); | |
671 | if (vs == 0) | |
672 | { | |
673 | sys$setast (1); | |
674 | remove_process (process); | |
675 | error ("Too many VMS processes"); | |
676 | } | |
677 | vs->inputChan = inchannel; | |
678 | vs->outputChan = outchannel; | |
679 | ||
680 | /* Start a read on the process channel */ | |
681 | start_vms_process_read (vs); | |
682 | ||
683 | /* Switch current directory so that the child inherits it. */ | |
684 | VMSgetwd (old_dir); | |
685 | child_setup (0, 0, 0, 0, 0); | |
686 | ||
687 | status = lib$spawn (&dcmd, &din, &dout, &spawn_flags, 0, &vs->pid, | |
688 | &vs->exitStatus, 0, child_sig, vs, &dprompt); | |
689 | chdir (old_dir); | |
690 | ||
691 | if (status != SS$_NORMAL) | |
692 | { | |
693 | sys$setast (1); | |
694 | remove_process (process); | |
695 | error ("Error calling LIB$SPAWN: %x", status); | |
696 | } | |
697 | vs->pid &= 0xffff; /* It needs to fit in a FASTINT, | |
698 | we don't need the rest of the bits */ | |
699 | pid = vs->pid; | |
700 | ||
701 | /* | |
702 | ON VMS process->infd holds the (event flag-1) | |
703 | that we use for doing I/O on that process. | |
704 | `input_wait_mask' is the cluster of event flags | |
705 | we can wait on. | |
706 | ||
707 | Event flags returned start at 1 for the keyboard. | |
708 | Since Unix expects descriptor 0 for the keyboard, | |
709 | we substract one from the event flag. | |
710 | */ | |
711 | inchannel = vs->eventFlag-1; | |
712 | ||
713 | /* Record this as an active process, with its channels. | |
714 | As a result, child_setup will close Emacs's side of the pipes. */ | |
715 | chan_process[inchannel] = process; | |
716 | XFASTINT (XPROCESS (process)->infd) = inchannel; | |
717 | XFASTINT (XPROCESS (process)->outfd) = outchannel; | |
718 | XFASTINT (XPROCESS (process)->flags) = RUNNING; | |
719 | ||
720 | /* Delay interrupts until we have a chance to store | |
721 | the new fork's pid in its process structure */ | |
722 | ||
723 | #define NO_ECHO "set term/noecho\r" | |
724 | sys$setast (0); | |
725 | /* | |
726 | Send a command to the process to not echo input | |
727 | ||
728 | The CMU PTY driver does not support SETMODEs. | |
729 | */ | |
730 | write_to_vms_process (vs, NO_ECHO, strlen (NO_ECHO)); | |
731 | ||
732 | XFASTINT (XPROCESS (process)->pid) = pid; | |
733 | sys$setast (1); | |
734 | } | |
735 | ||
736 | child_sig (vs) | |
737 | VMS_PROC_STUFF *vs; | |
738 | { | |
739 | register int pid; | |
740 | Lisp_Object tail, proc; | |
741 | register struct Lisp_Process *p; | |
742 | int old_errno = errno; | |
743 | ||
744 | pid = vs->pid; | |
745 | sys$setef (vs->eventFlag); | |
746 | ||
747 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
748 | { | |
749 | proc = XCONS (XCONS (tail)->car)->cdr; | |
750 | p = XPROCESS (proc); | |
751 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
752 | break; | |
753 | } | |
754 | ||
755 | if (XSYMBOL (tail) == XSYMBOL (Qnil)) | |
756 | return; | |
757 | ||
758 | child_changed++; | |
759 | XFASTINT (p->flags) = EXITED | CHANGED; | |
760 | /* Truncate the exit status to 24 bits so that it fits in a FASTINT */ | |
761 | XFASTINT (p->reason) = (vs->exitStatus) & 0xffffff; | |
762 | } | |
763 | ||
764 | syms_of_vmsproc () | |
765 | { | |
766 | defsubr (&Scall_process); | |
767 | } | |
768 | ||
769 | init_vmsproc () | |
770 | { | |
771 | char *malloc (); | |
772 | int i; | |
773 | VMS_PROC_STUFF *vs; | |
774 | ||
775 | for (vs=procList, i=0; i<MAX_EVENT_FLAGS+1; i++, vs++) | |
776 | { | |
777 | vs->busy = 0; | |
778 | vs->eventFlag = i; | |
779 | sys$clref (i); | |
780 | vs->inputChan = 0; | |
781 | vs->pid = 0; | |
782 | } | |
783 | procList[0].busy = 1; /* Zero is reserved */ | |
784 | } |