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e8fa588c C |
1 | /************************************************************************* |
2 | * This program is copyright (C) 1985, 1986 by Jonathan Payne. It is * | |
3 | * provided to you without charge for use only on a licensed Unix * | |
4 | * system. You may copy JOVE provided that this notice is included with * | |
5 | * the copy. You may not sell copies of this program or versions * | |
6 | * modified for use on microcomputer systems, unless the copies are * | |
7 | * included with a Unix system distribution and the source is provided. * | |
8 | *************************************************************************/ | |
9 | ||
10 | /* Contains the main loop initializations, and some system dependent | |
11 | type things, e.g. putting terminal in CBREAK mode, etc. */ | |
12 | ||
13 | #include "jove.h" | |
14 | #include "io.h" | |
15 | #include "termcap.h" | |
16 | ||
17 | #include <varargs.h> | |
18 | #include <sys/stat.h> | |
19 | #include <signal.h> | |
20 | #include <errno.h> | |
21 | #ifndef SYSV | |
22 | #include <sgtty.h> | |
23 | #include <fcntl.h> | |
24 | #else | |
25 | #include <termio.h> | |
26 | #endif SYSV | |
27 | ||
28 | #ifdef TIOCSLTC | |
29 | struct ltchars ls1, | |
30 | ls2; | |
31 | #endif TIOCSLTC | |
32 | ||
33 | #ifdef TIOCGETC | |
34 | struct tchars tc1, | |
35 | tc2; | |
36 | #endif | |
37 | ||
38 | #ifdef BRLUNIX | |
39 | struct sg_brl sg1, sg2; | |
40 | #else | |
41 | #ifdef SYSV | |
42 | struct termio sg1, sg2; | |
43 | #else SYSV | |
44 | struct sgttyb sg1, sg2; | |
45 | #endif SYSV | |
46 | #endif BRLUNIX | |
47 | ||
48 | #ifdef BIFF | |
49 | private struct stat tt_stat; /* for biff */ | |
50 | #ifndef BSD4_2 | |
51 | private char *tt_name = 0; /* name of the control tty */ | |
52 | extern char *ttyname(); /* for systems w/o fchmod ... */ | |
53 | #endif | |
54 | private int dw_biff = NO; /* whether or not to fotz at all */ | |
55 | #endif | |
56 | ||
57 | time_t time0; /* when jove started up */ | |
58 | int errormsg; | |
59 | extern char *tfname; | |
60 | char NullStr[] = ""; | |
61 | ||
62 | finish(code) | |
63 | { | |
64 | int CoreDump = (code != 0 && code != SIGHUP), | |
65 | DelTmps = 1; /* Usually we delete them. */ | |
66 | ||
67 | #ifdef LSRHS | |
68 | if (CoreDump) | |
69 | setdump(1); | |
70 | #endif | |
71 | if (code == SIGINT) { | |
72 | char c; | |
73 | ||
74 | #ifndef MENLO_JCL | |
75 | (void) signal(code, finish); | |
76 | #endif | |
77 | f_mess("Abort (Type 'n' if you're not sure)? "); | |
78 | (void) read(0, &c, 1); | |
79 | message(NullStr); | |
80 | if ((c & 0377) != 'y') { | |
81 | redisplay(); | |
82 | return; | |
83 | } | |
84 | } | |
85 | ttyset(OFF); | |
86 | UnsetTerm(NullStr); | |
87 | if (code != 0) { | |
88 | if (!Crashing) { | |
89 | Crashing++; | |
90 | lsave(); | |
91 | SyncRec(); | |
92 | printf("JOVE CRASH!! (code %d)\n", code); | |
93 | if (ModBufs(1)) { | |
94 | printf("Your buffers have been saved.\n"); | |
95 | printf("Use \"jove_recover\" or \"jove -r\"\n"); | |
96 | printf("to have a look at them.\n"); | |
97 | DelTmps = 0; /* Don't delete anymore. */ | |
98 | } else | |
99 | printf("You didn't lose any work.\n"); | |
100 | } else | |
101 | printf("\r\nYou may have lost your work!\n"); | |
102 | } | |
103 | flusho(); | |
104 | if (DelTmps) { | |
105 | tmpclose(); | |
106 | recclose(); | |
107 | } | |
108 | if (CoreDump) | |
109 | abort(); | |
110 | #ifdef PROFILING | |
111 | exit(exp_p); | |
112 | #else | |
113 | _exit(exp_p); | |
114 | #endif | |
115 | } | |
116 | ||
117 | private char smbuf[20], | |
118 | *bp = smbuf; | |
119 | private int nchars = 0; | |
120 | ||
121 | private char peekbuf[10], | |
122 | *peekp = peekbuf; | |
123 | ||
124 | #ifdef SYSV | |
125 | void | |
126 | setblock(fd, on) /* turn blocking on or off */ | |
127 | register int fd, on; | |
128 | { | |
129 | static int blockf, nonblockf; | |
130 | static int first = 1; | |
131 | int flags; | |
132 | ||
133 | if (first) { | |
134 | first = 0; | |
135 | if ((flags = fcntl(fd, F_GETFL, 0)) == -1) | |
136 | finish(SIGHUP); | |
137 | blockf = flags & ~O_NDELAY; /* make sure O_NDELAY is off */ | |
138 | nonblockf = flags | O_NDELAY; /* make sure O_NDELAY is on */ | |
139 | } | |
140 | if (fcntl(fd, F_SETFL, on ? blockf : nonblockf) == -1) | |
141 | finish(SIGHUP); | |
142 | return; | |
143 | } | |
144 | #endif SYSV | |
145 | ||
146 | Peekc() | |
147 | { | |
148 | int c; | |
149 | ||
150 | if (peekp == peekbuf) | |
151 | c = -1; | |
152 | else | |
153 | c = *--peekp & 0377; | |
154 | return c; | |
155 | } | |
156 | ||
157 | Ungetc(c) | |
158 | { | |
159 | if (peekp == &peekbuf[(sizeof peekbuf) - 1]) | |
160 | return; /* Sorry, can't oblige you ... */ | |
161 | *peekp++ = c; | |
162 | } | |
163 | ||
164 | char *Inputp = 0; | |
165 | ||
166 | #ifdef IPROCS | |
167 | #ifdef PIPEPROCS | |
168 | getchar() | |
169 | { | |
170 | extern int errno; | |
171 | register int c; | |
172 | ||
173 | if (nchars <= 0) { | |
174 | do | |
175 | nchars = read(0, smbuf, sizeof smbuf); | |
176 | #ifdef SYSV | |
177 | while (nchars == 0 || (nchars < 0 && errno == EINTR)); | |
178 | if (nchars < 0) | |
179 | #else | |
180 | while (nchars < 0 && errno == EINTR); | |
181 | if (nchars <= 0) | |
182 | #endif SYSV | |
183 | finish(SIGHUP); | |
184 | bp = smbuf; | |
185 | InputPending = nchars > 1; | |
186 | } | |
187 | if (((c = *bp) & 0200) && MetaKey != 0) { | |
188 | *bp = (c & 0177); | |
189 | return '\033'; | |
190 | } | |
191 | nchars--; | |
192 | return (*bp++ & 0177); | |
193 | } | |
194 | #else PIPEPROCS | |
195 | getchar() | |
196 | { | |
197 | extern int global_fd, | |
198 | NumProcs, | |
199 | errno; | |
200 | register int tmp, | |
201 | nfds; | |
202 | int reads, | |
203 | c; | |
204 | ||
205 | if (nchars <= 0) { | |
206 | /* Get a character from the keyboard, first checking for | |
207 | any input from a process. Handle that first, and then | |
208 | deal with the terminal input. */ | |
209 | if (NumProcs > 0) { | |
210 | do { | |
211 | do { | |
212 | reads = global_fd; | |
213 | nfds = select(32, &reads, (int *) 0, (int *) 0, (struct timeval *) 0); | |
214 | } while (nfds < 0 && errno == EINTR); | |
215 | ||
216 | switch (nfds) { | |
217 | case -1: | |
218 | printf("\rerror %d in select %d", errno, global_fd); | |
219 | global_fd = 1; | |
220 | break; | |
221 | default: | |
222 | if (reads & 01) { | |
223 | nchars = read(0, smbuf, sizeof(smbuf)); | |
224 | reads &= ~01; | |
225 | --nfds; | |
226 | } | |
227 | ||
228 | while (nfds--) { | |
229 | tmp = ffs(reads) - 1; | |
230 | read_proc(tmp); | |
231 | reads &= ~tmp; | |
232 | } | |
233 | ||
234 | break; | |
235 | } | |
236 | } while (nchars <= 0); | |
237 | } else { | |
238 | do | |
239 | nchars = read(0, smbuf, sizeof(smbuf)); | |
240 | while (nchars < 0 && errno == EINTR); | |
241 | } | |
242 | ||
243 | if (nchars <= 0) | |
244 | finish(SIGHUP); | |
245 | ||
246 | bp = smbuf; | |
247 | InputPending = (nchars > 1); | |
248 | } | |
249 | ||
250 | if (((c = *bp) & 0200) && MetaKey != 0) { | |
251 | *bp = (c & 0177); | |
252 | return '\033'; | |
253 | } | |
254 | nchars--; | |
255 | return *bp++ & 0377; | |
256 | } | |
257 | #endif PIPEPROCS | |
258 | #else IPROCS | |
259 | getchar() | |
260 | { | |
261 | extern int errno; | |
262 | register int c; | |
263 | ||
264 | if (nchars <= 0) { | |
265 | do | |
266 | nchars = read(0, smbuf, sizeof smbuf); | |
267 | while (nchars < 0 && errno == EINTR); | |
268 | ||
269 | if (nchars <= 0) | |
270 | finish(SIGHUP); | |
271 | bp = smbuf; | |
272 | InputPending = nchars > 1; | |
273 | } | |
274 | if (((c = *bp) & 0200) && MetaKey != 0) { | |
275 | *bp = (c & 0177); | |
276 | return '\033'; | |
277 | } | |
278 | nchars--; | |
279 | return *bp++ & 0377; | |
280 | } | |
281 | #endif IPROCS | |
282 | ||
283 | int InputPending = 0; | |
284 | ||
285 | /* Returns non-zero if a character waiting */ | |
286 | ||
287 | charp() | |
288 | { | |
289 | int some = 0; | |
290 | ||
291 | if (InJoverc != 0 || nchars > 0 || Inputp != 0) | |
292 | return 1; | |
293 | #ifdef BRLUNIX | |
294 | { | |
295 | static struct sg_brl gttyBuf; | |
296 | ||
297 | gtty(0, (char *) >tyBuf); | |
298 | if (gttyBuf.sg_xflags & INWAIT) | |
299 | some++; | |
300 | } | |
301 | #endif | |
302 | #ifdef FIONREAD | |
303 | { | |
304 | long c; | |
305 | ||
306 | if (ioctl(0, FIONREAD, (struct sgttyb *) &c) == -1) | |
307 | c = 0; | |
308 | some = (c > 0); | |
309 | } | |
310 | #endif FIONREAD | |
311 | #ifdef SYSV | |
312 | setblock(0, 0); /* turn blocking off */ | |
313 | nchars = read(0, smbuf, sizeof smbuf); /* Is anything there? */ | |
314 | setblock(0, 1); /* turn blocking on */ | |
315 | if (nchars > 0) /* something was there */ | |
316 | bp = smbuf; /* make sure bp points to it */ | |
317 | some = (nchars > 0); /* just say we found something */ | |
318 | #endif SYSV | |
319 | #ifdef c70 | |
320 | some = !empty(0); | |
321 | #endif | |
322 | return some; | |
323 | } | |
324 | ||
325 | ResetTerm() | |
326 | { | |
327 | putpad(TI, 1); | |
328 | putpad(VS, 1); | |
329 | putpad(KS, 1); | |
330 | #ifdef BIFF | |
331 | if (BiffChk != dw_biff) | |
332 | biff_init(); | |
333 | /* just in case we changed our minds about whether to deal with | |
334 | biff */ | |
335 | #endif | |
336 | chkmail(YES); /* force it to check to we can be accurate */ | |
337 | do_sgtty(); /* this is so if you change baudrate or stuff | |
338 | like that, JOVE will notice. */ | |
339 | ttyset(ON); | |
340 | } | |
341 | ||
342 | UnsetTerm(mesg) | |
343 | char *mesg; | |
344 | { | |
345 | ttyset(OFF); | |
346 | putpad(KE, 1); | |
347 | putpad(VE, 1); | |
348 | putpad(TE, 1); | |
349 | #ifdef ID_CHAR | |
350 | INSmode(0); | |
351 | #endif | |
352 | Placur(ILI, 0); | |
353 | printf("%s", mesg); | |
354 | putpad(CE, 1); | |
355 | flusho(); | |
356 | } | |
357 | ||
358 | #ifdef JOB_CONTROL | |
359 | PauseJove() | |
360 | { | |
361 | UnsetTerm(ModBufs(0) ? "[There are modified buffers]" : NullStr); | |
362 | (void) kill(0, SIGTSTP); | |
363 | ResetTerm(); | |
364 | ClAndRedraw(); | |
365 | } | |
366 | #endif | |
367 | ||
368 | Push() | |
369 | { | |
370 | int pid; | |
371 | ||
372 | switch (pid = fork()) { | |
373 | case -1: | |
374 | complain("[Fork failed]"); | |
375 | ||
376 | case 0: | |
377 | UnsetTerm(NullStr); | |
378 | (void) signal(SIGTERM, SIG_DFL); | |
379 | (void) signal(SIGINT, SIG_DFL); | |
380 | execl(Shell, basename(Shell), 0); | |
381 | message("[Execl failed]"); | |
382 | _exit(1); | |
383 | ||
384 | default: | |
385 | { | |
386 | int (*old_int)() = signal(SIGINT, SIG_IGN); | |
387 | int (*old_quit)() = signal(SIGQUIT, SIG_IGN); | |
388 | ||
389 | #ifdef IPROCS | |
390 | sighold(SIGCHLD); | |
391 | #endif | |
392 | dowait(pid, (int *) 0); | |
393 | #ifdef IPROCS | |
394 | sigrelse(SIGCHLD); | |
395 | #endif | |
396 | ResetTerm(); | |
397 | ClAndRedraw(); | |
398 | (void) signal(SIGINT, old_int); | |
399 | (void) signal(SIGQUIT, old_quit); | |
400 | } | |
401 | } | |
402 | } | |
403 | ||
404 | int OKXonXoff = 0; /* ^S and ^Q initially DON'T work */ | |
405 | ||
406 | ttsize() | |
407 | { | |
408 | #ifdef TIOCGWINSZ | |
409 | struct winsize win; | |
410 | ||
411 | if (ioctl (0, TIOCGWINSZ, &win) == 0) { | |
412 | if (win.ws_col) | |
413 | CO = win.ws_col; | |
414 | if (win.ws_row) | |
415 | LI = win.ws_row; | |
416 | } | |
417 | #else TIOCGWINSZ | |
418 | #ifdef BTL_BLIT | |
419 | #include <sys/jioctl.h> | |
420 | struct jwinsize jwin; | |
421 | ||
422 | if (ioctl(0, JWINSIZE, &jwin) == 0) { | |
423 | if (jwin.bytesx) | |
424 | CO = jwin.bytesx; | |
425 | if (jwin.bytesy) | |
426 | LI = jwin.bytesy; | |
427 | } | |
428 | #endif BTL_BLIT | |
429 | #endif TIOCGWINSZ | |
430 | ILI = LI - 1; | |
431 | } | |
432 | ||
433 | #ifdef BIFF | |
434 | biff_init() | |
435 | { | |
436 | dw_biff = ((BiffChk) && | |
437 | #ifndef BSD4_2 | |
438 | ((tt_name != 0) || (tt_name = ttyname(0))) && | |
439 | (stat(tt_name, &tt_stat) != -1) && | |
440 | #else | |
441 | (fstat(0, &tt_stat) != -1) && | |
442 | #endif | |
443 | (tt_stat.st_mode & S_IEXEC)); /* he's using biff */ | |
444 | ||
445 | } | |
446 | ||
447 | biff(on) | |
448 | { | |
449 | if (dw_biff == NO) | |
450 | return; | |
451 | #ifndef BSD4_2 | |
452 | (void) chmod(tt_name, on ? tt_stat.st_mode : | |
453 | (tt_stat.st_mode & ~S_IEXEC)); | |
454 | #else | |
455 | (void) fchmod(0, on ? tt_stat.st_mode : | |
456 | (tt_stat.st_mode & ~S_IEXEC)); | |
457 | #endif | |
458 | } | |
459 | ||
460 | #endif | |
461 | ||
462 | ttinit() | |
463 | { | |
464 | #ifdef BIFF | |
465 | biff_init(); | |
466 | #endif | |
467 | #ifdef TIOCSLTC | |
468 | (void) ioctl(0, TIOCGLTC, (struct sgttyb *) &ls1); | |
469 | ls2 = ls1; | |
470 | ls2.t_suspc = (char) -1; | |
471 | ls2.t_dsuspc = (char) -1; | |
472 | ls2.t_flushc = (char) -1; | |
473 | ls2.t_lnextc = (char) -1; | |
474 | #endif | |
475 | ||
476 | #ifdef TIOCGETC | |
477 | /* Change interupt and quit. */ | |
478 | (void) ioctl(0, TIOCGETC, (struct sgttyb *) &tc1); | |
479 | tc2 = tc1; | |
480 | tc2.t_intrc = CTL(]); | |
481 | tc2.t_quitc = (char) -1; | |
482 | if (OKXonXoff) { | |
483 | tc2.t_stopc = (char) -1; | |
484 | tc2.t_startc = (char) -1; | |
485 | } | |
486 | #endif TIOCGETC | |
487 | do_sgtty(); | |
488 | } | |
489 | ||
490 | private int done_ttinit = 0; | |
491 | ||
492 | do_sgtty() | |
493 | { | |
494 | #ifdef SYSV | |
495 | (void) ioctl(0, TCGETA, (char *) &sg1); | |
496 | #else | |
497 | (void) gtty(0, &sg1); | |
498 | #endif SYSV | |
499 | sg2 = sg1; | |
500 | ||
501 | #ifdef SYSV | |
502 | TABS = !((sg1.c_oflag & TAB3) == TAB3); | |
503 | ospeed = sg1.c_cflag & CBAUD; | |
504 | ||
505 | sg2.c_iflag &= ~(INLCR|ICRNL|IGNCR); | |
506 | sg2.c_lflag &= ~(ISIG|ICANON|ECHO); | |
507 | sg2.c_oflag &= ~(OCRNL|ONLCR); | |
508 | sg2.c_cc[VMIN] = sizeof smbuf; | |
509 | sg2.c_cc[VTIME] = 1; | |
510 | #else | |
511 | TABS = !(sg1.sg_flags & XTABS); | |
512 | ospeed = sg1.sg_ospeed; | |
513 | #ifdef BRLUNIX | |
514 | sg2.sg_flags &= ~(ECHO | CRMOD); | |
515 | sg2.sg_flags |= CBREAK; | |
516 | ||
517 | /* VT100 Kludge: leave STALL on for flow control if DC3DC1 (Yuck.) */ | |
518 | sg2.sg_xflags &= ~((sg2.sg_xflags&DC3DC1 ? 0 : STALL) | PAGE); | |
519 | #else | |
520 | sg2.sg_flags &= ~(ECHO | CRMOD); | |
521 | #endif BRLUNIX | |
522 | ||
523 | #ifdef EUNICE | |
524 | sg2.sg_flags |= RAW; /* Eunice needs RAW mode last I heard. */ | |
525 | #else | |
526 | #ifdef PURDUE_EE | |
527 | # ifdef pdp11 | |
528 | sg2.sg_flags |= RAW; | |
529 | # else | |
530 | sg2.sg_flags |= (MetaKey ? RAW : CBREAK); | |
531 | # endif | |
532 | #else | |
533 | sg2.sg_flags |= (MetaKey ? RAW : CBREAK); | |
534 | #endif PURDUE_EE | |
535 | #endif EUNICE | |
536 | #endif SYSV | |
537 | } | |
538 | ||
539 | tty_reset() | |
540 | { | |
541 | if (!done_ttinit) | |
542 | return; | |
543 | ttyset(OFF); /* go back to original modes */ | |
544 | ttinit(); | |
545 | ttyset(ON); | |
546 | } | |
547 | ||
548 | /* If n is OFF reset to original modes */ | |
549 | ||
550 | ttyset(n) | |
551 | { | |
552 | if (!done_ttinit && n == 0) /* Try to reset before we've set! */ | |
553 | return; | |
554 | #ifdef SYSV | |
555 | (void) ioctl(0, TCSETAW, n == 0 ? (struct sgttyb *) &sg1 : (struct sgttyb *) &sg2); | |
556 | #else | |
557 | #ifdef BRLUNIX | |
558 | (void) stty(0, n == 0 ? (struct sgttyb *) &sg1 : (struct sgttyb *) &sg2); | |
559 | #else | |
560 | (void) ioctl(0, TIOCSETN, n == 0 ? (struct sgttyb *) &sg1 : (struct sgttyb *) &sg2); | |
561 | #endif BRLUNIX | |
562 | #endif SYSV | |
563 | ||
564 | #ifdef TIOCSETC | |
565 | (void) ioctl(0, TIOCSETC, n == 0 ? (struct sgttyb *) &tc1 : (struct sgttyb *) &tc2); | |
566 | #endif TIOCSETC | |
567 | #ifdef TIOCSLTC | |
568 | (void) ioctl(0, TIOCSLTC, n == 0 ? (struct sgttyb *) &ls1 : (struct sgttyb *) &ls2); | |
569 | #endif TIOCSLTC | |
570 | done_ttinit = 1; | |
571 | #ifdef BIFF | |
572 | biff(!n); | |
573 | #endif | |
574 | } | |
575 | ||
576 | int this_cmd, | |
577 | last_cmd; | |
578 | ||
579 | dispatch(c) | |
580 | register int c; | |
581 | { | |
582 | data_obj *cp; | |
583 | ||
584 | this_cmd = 0; | |
585 | cp = mainmap[c & 0177]; | |
586 | ||
587 | if (cp == 0) { | |
588 | rbell(); | |
589 | exp = 1; | |
590 | exp_p = errormsg = 0; | |
591 | message(NullStr); | |
592 | return; | |
593 | } | |
594 | ExecCmd(cp); | |
595 | } | |
596 | ||
597 | int LastKeyStruck, | |
598 | MetaKey = 0; | |
599 | ||
600 | getch() | |
601 | { | |
602 | register int c, | |
603 | peekc; | |
604 | #ifdef IPROCS | |
605 | extern int NumProcs; | |
606 | #endif | |
607 | extern int ModCount, | |
608 | Interactive; | |
609 | ||
610 | if (Inputp) { | |
611 | if ((c = *Inputp++) != 0) | |
612 | return LastKeyStruck = c; | |
613 | Inputp = 0; | |
614 | } | |
615 | ||
616 | if (InJoverc) | |
617 | return EOF; /* somethings wrong if Inputp runs out while | |
618 | we're reading a .joverc file. */ | |
619 | ||
620 | if (ModCount >= SyncFreq) { | |
621 | ModCount = 0; | |
622 | SyncRec(); | |
623 | } | |
624 | ||
625 | /* If we're not interactive and we're not executing a macro, | |
626 | AND there are no ungetc'd characters, we read from the | |
627 | terminal (i.e., getch()). And characters only get put | |
628 | in macros from inside this if. */ | |
629 | if (((peekc = c = Peekc()) == -1) && (Interactive || ((c = mac_getc()) == -1))) { | |
630 | /* So messages that aren't error messages don't | |
631 | hang around forever. */ | |
632 | if (!UpdMesg && !Asking) { /* Don't erase if we are asking */ | |
633 | if (mesgbuf[0] && !errormsg) | |
634 | message(NullStr); | |
635 | } | |
636 | redisplay(); | |
637 | #ifdef IPROCS | |
638 | # ifdef PIPEPROCS | |
639 | if (NumProcs > 0) { | |
640 | sigrelse(INPUT_SIG); | |
641 | sigrelse(SIGCHLD); | |
642 | } | |
643 | # endif | |
644 | #endif | |
645 | inIOread = 1; | |
646 | if ((c = getchar()) == EOF) | |
647 | finish(SIGHUP); | |
648 | inIOread = 0; | |
649 | ||
650 | #ifdef IPROCS | |
651 | # ifdef PIPEPROCS | |
652 | if (NumProcs > 0) { | |
653 | sighold(INPUT_SIG); | |
654 | sighold(SIGCHLD); | |
655 | } | |
656 | # endif | |
657 | #endif | |
658 | if (!Interactive && (KeyMacro.m_flags & DEFINE)) | |
659 | mac_putc(c); | |
660 | } | |
661 | if (peekc == -1) /* Don't add_stroke peekc's */ | |
662 | add_stroke(c); | |
663 | return LastKeyStruck = c; | |
664 | } | |
665 | ||
666 | dorecover() | |
667 | { | |
668 | execl(RECOVER, "jove_recover", 0); | |
669 | printf("%s: execl failed!\n", RECOVER); | |
670 | flusho(); | |
671 | _exit(-1); | |
672 | } | |
673 | ||
674 | ||
675 | ShowVersion() | |
676 | { | |
677 | extern char *version; | |
678 | ||
679 | s_mess("Jonathan's Own Version of Emacs (%s)", version); | |
680 | } | |
681 | ||
682 | UNIX_cmdline(argc, argv) | |
683 | char *argv[]; | |
684 | { | |
685 | int lineno = 0, | |
686 | nwinds = 1; | |
687 | Buffer *b; | |
688 | ||
689 | ShowVersion(); | |
690 | while (argc > 1) { | |
691 | if (argv[1][0] != '-' && argv[1][0] != '+') { | |
692 | int force = (nwinds > 0 || lineno != 0); | |
693 | ||
694 | minib_add(argv[1], force ? YES : NO); | |
695 | b = do_find(nwinds > 0 ? curwind : (Window *) 0, | |
696 | argv[1], force); | |
697 | if (force) { | |
698 | SetABuf(curbuf); | |
699 | SetBuf(b); | |
700 | SetLine(next_line(curbuf->b_first, lineno)); | |
701 | if (nwinds > 1) | |
702 | NextWindow(); | |
703 | if (nwinds) | |
704 | nwinds--; | |
705 | } | |
706 | lineno = 0; | |
707 | } else switch (argv[1][1]) { | |
708 | case 'd': | |
709 | ++argv; | |
710 | --argc; | |
711 | break; | |
712 | ||
713 | case 'j': /* Ignore .joverc in HOME */ | |
714 | break; | |
715 | ||
716 | case 'p': | |
717 | ++argv; | |
718 | --argc; | |
719 | SetBuf(do_find(curwind, argv[1], 0)); | |
720 | ParseAll(); | |
721 | nwinds = 0; | |
722 | break; | |
723 | ||
724 | case 't': | |
725 | ++argv; | |
726 | --argc; | |
727 | exp_p = 1; | |
728 | find_tag(argv[1], YES); | |
729 | break; | |
730 | ||
731 | case 'w': | |
732 | if (argv[1][2] == '\0') | |
733 | nwinds++; | |
734 | else | |
735 | nwinds += -1 + chr_to_int(&argv[1][2], 10, NIL); | |
736 | (void) div_wind(curwind, nwinds - 1); | |
737 | break; | |
738 | ||
739 | case '0': | |
740 | case '1': | |
741 | case '2': | |
742 | case '3': | |
743 | case '4': | |
744 | case '5': | |
745 | case '6': | |
746 | case '7': | |
747 | case '8': | |
748 | case '9': | |
749 | lineno = chr_to_int(&argv[1][1], 10, 0) - 1; | |
750 | break; | |
751 | } | |
752 | ++argv; | |
753 | --argc; | |
754 | } | |
755 | } | |
756 | ||
757 | #ifdef lint | |
758 | Ignore(a) | |
759 | char *a; | |
760 | { | |
761 | ||
762 | a = a; | |
763 | } | |
764 | ||
765 | Ignorf(a) | |
766 | int (*a)(); | |
767 | { | |
768 | ||
769 | a = a; | |
770 | } | |
771 | ||
772 | Ignorl(a) | |
773 | long a; | |
774 | { | |
775 | a = a; | |
776 | } | |
777 | #endif | |
778 | ||
779 | /* VARARGS1 */ | |
780 | ||
781 | error(fmt, va_alist) | |
782 | char *fmt; | |
783 | va_dcl | |
784 | { | |
785 | va_list ap; | |
786 | ||
787 | if (fmt) { | |
788 | va_start(ap); | |
789 | format(mesgbuf, sizeof mesgbuf, fmt, ap); | |
790 | va_end(ap); | |
791 | UpdMesg++; | |
792 | } | |
793 | rbell(); | |
794 | (void) longjmp(mainjmp, ERROR); | |
795 | } | |
796 | ||
797 | /* VARARGS1 */ | |
798 | ||
799 | complain(fmt, va_alist) | |
800 | char *fmt; | |
801 | va_dcl | |
802 | { | |
803 | va_list ap; | |
804 | ||
805 | if (fmt) { | |
806 | va_start(ap); | |
807 | format(mesgbuf, sizeof mesgbuf, fmt, ap); | |
808 | va_end(ap); | |
809 | UpdMesg++; | |
810 | } | |
811 | rbell(); | |
812 | (void) longjmp(mainjmp, COMPLAIN); | |
813 | } | |
814 | ||
815 | /* VARARGS1 */ | |
816 | ||
817 | confirm(fmt, va_alist) | |
818 | char *fmt; | |
819 | va_dcl | |
820 | { | |
821 | char *yorn; | |
822 | va_list ap; | |
823 | ||
824 | va_start(ap); | |
825 | format(mesgbuf, sizeof mesgbuf, fmt, ap); | |
826 | va_end(ap); | |
827 | yorn = ask((char *) 0, mesgbuf); | |
828 | if (*yorn != 'Y' && *yorn != 'y') | |
829 | (void) longjmp(mainjmp, COMPLAIN); | |
830 | } | |
831 | ||
832 | int RecDepth = 0; | |
833 | ||
834 | Recur() | |
835 | { | |
836 | char bname[128]; | |
837 | Mark *m; | |
838 | ||
839 | sprintf(bname, "%s", curbuf->b_name); | |
840 | m = MakeMark(curline, curchar, FLOATER); | |
841 | ||
842 | RecDepth++; | |
843 | UpdModLine++; | |
844 | DoKeys(1); /* 1 means not first time */ | |
845 | UpdModLine++; | |
846 | RecDepth--; | |
847 | SetBuf(do_select(curwind, bname)); | |
848 | if (!exp_p) | |
849 | ToMark(m); | |
850 | DelMark(m); | |
851 | } | |
852 | ||
853 | jmp_buf mainjmp; | |
854 | int iniargc; /* main sets these for DoKeys() */ | |
855 | char **iniargv; | |
856 | ||
857 | DoKeys(nocmdline) | |
858 | { | |
859 | int c; | |
860 | jmp_buf savejmp; | |
861 | ||
862 | push_env(savejmp); | |
863 | ||
864 | switch (setjmp(mainjmp)) { | |
865 | case 0: | |
866 | if (!nocmdline) | |
867 | UNIX_cmdline(iniargc, iniargv); | |
868 | break; | |
869 | ||
870 | case QUIT: | |
871 | if (RecDepth == 0) { | |
872 | if (ModMacs()) { | |
873 | rbell(); | |
874 | if (Upper(*ask("No", | |
875 | "Some MACROS haven't been saved; leave anyway? ")) != 'Y') | |
876 | break; | |
877 | } | |
878 | if (ModBufs(0)) { | |
879 | rbell(); | |
880 | if (Upper(*ask("No", | |
881 | "Some buffers haven't been saved; leave anyway? ")) != 'Y') | |
882 | break; | |
883 | } | |
884 | #ifdef IPROCS | |
885 | KillProcs(); | |
886 | #endif | |
887 | } | |
888 | pop_env(savejmp); | |
889 | return; | |
890 | ||
891 | case ERROR: | |
892 | getDOT(); /* God knows what state linebuf was in */ | |
893 | ||
894 | case COMPLAIN: | |
895 | gc_openfiles(); /* close any files we left open */ | |
896 | errormsg++; | |
897 | fix_macros(); | |
898 | Asking = 0; | |
899 | curwind->w_bufp = curbuf; | |
900 | redisplay(); | |
901 | break; | |
902 | } | |
903 | ||
904 | this_cmd = last_cmd = 0; | |
905 | ||
906 | for (;;) { | |
907 | if (this_cmd != ARG_CMD) { | |
908 | exp = 1; | |
909 | exp_p = 0; | |
910 | last_cmd = this_cmd; | |
911 | init_strokes(); | |
912 | } | |
913 | c = getch(); | |
914 | if (c == -1) | |
915 | continue; | |
916 | dispatch(c); | |
917 | } | |
918 | } | |
919 | ||
920 | int Crashing = 0; | |
921 | ||
922 | char ** | |
923 | scanvec(args, str) | |
924 | register char **args, | |
925 | *str; | |
926 | { | |
927 | while (*args) { | |
928 | if (strcmp(*args, str) == 0) | |
929 | return args; | |
930 | args++; | |
931 | } | |
932 | return 0; | |
933 | } | |
934 | ||
935 | int UpdFreq = 30, | |
936 | inIOread = 0; | |
937 | ||
938 | updmode() | |
939 | { | |
940 | UpdModLine++; | |
941 | if (inIOread) | |
942 | redisplay(); | |
943 | #ifndef JOB_CONTROL | |
944 | (void) signal(SIGALRM, updmode); | |
945 | #endif | |
946 | (void) alarm((unsigned) UpdFreq); | |
947 | } | |
948 | ||
949 | #ifdef TIOCGWINSZ | |
950 | #ifdef SIGWINCH | |
951 | extern win_reshape(); | |
952 | #endif | |
953 | #endif | |
954 | ||
955 | #ifdef TIOCGWINSZ | |
956 | #ifdef SIGWINCH | |
957 | win_reshape() | |
958 | { | |
959 | register int diff; | |
960 | ||
961 | (void) signal(SIGWINCH, SIG_IGN); | |
962 | ||
963 | /* | |
964 | * Save old number of lines. | |
965 | */ | |
966 | diff = LI; | |
967 | ||
968 | /* | |
969 | * Get new line/col info. | |
970 | */ | |
971 | ttsize(); | |
972 | ||
973 | /* | |
974 | * LI has changed, and now holds the | |
975 | * new value. See how much the size | |
976 | * changed. | |
977 | */ | |
978 | diff = LI - diff; | |
979 | ||
980 | /* | |
981 | * Change the size of the current window | |
982 | * only. If they shrank by more than | |
983 | * the window size, tough. | |
984 | */ | |
985 | if ((curwind->w_height + diff) < 2) | |
986 | curwind->w_height = 2; | |
987 | else | |
988 | curwind->w_height += diff; | |
989 | ||
990 | make_scr(); | |
991 | redisplay(); | |
992 | ||
993 | (void) signal(SIGWINCH, win_reshape); | |
994 | } | |
995 | #endif | |
996 | #endif | |
997 | ||
998 | main(argc, argv) | |
999 | char *argv[]; | |
1000 | { | |
1001 | char ttbuf[512], | |
1002 | #ifndef VMUNIX | |
1003 | s_iobuff[LBSIZE], | |
1004 | s_genbuf[LBSIZE], | |
1005 | s_linebuf[LBSIZE], | |
1006 | #endif | |
1007 | *cp; | |
1008 | ||
1009 | ||
1010 | #ifndef VMUNIX | |
1011 | /* The way I look at it, there ain't no way I is gonna run | |
1012 | out of stack space UNLESS I have some kind of infinite | |
1013 | recursive bug. So why use up some valuable memory, when | |
1014 | there is plenty of space on the stack? (This only matters | |
1015 | on wimpy pdp11's, of course.) */ | |
1016 | ||
1017 | iobuff = s_iobuff; | |
1018 | genbuf = s_genbuf; | |
1019 | linebuf = s_linebuf; | |
1020 | #endif | |
1021 | ||
1022 | errormsg = 0; | |
1023 | ||
1024 | iniargc = argc; | |
1025 | iniargv = argv; | |
1026 | ||
1027 | if (setjmp(mainjmp)) { | |
1028 | printf("\rAck! I can't deal with error \"%s\" now.\n\r", mesgbuf); | |
1029 | finish(0); | |
1030 | } | |
1031 | ||
1032 | if (scanvec(argv, "-r")) | |
1033 | dorecover(); | |
1034 | ||
1035 | getTERM(); /* Get terminal. */ | |
1036 | if (getenv("METAKEY")) | |
1037 | MetaKey = 1; | |
1038 | ttsize(); | |
1039 | InitCM(); | |
1040 | ||
1041 | tmpinit(); /* Init temp file. */ | |
1042 | ||
1043 | if (cp = getenv("SHELL")) | |
1044 | strcpy(Shell, cp); | |
1045 | ||
1046 | make_scr(); | |
1047 | mac_init(); /* Initialize Macros */ | |
1048 | winit(); /* Initialize Window */ | |
1049 | #ifdef IPROCS | |
1050 | pinit(); /* Pipes/process initialization */ | |
1051 | #endif | |
1052 | SetBuf(do_select(curwind, Mainbuf)); | |
1053 | ||
1054 | #ifdef CHDIR | |
1055 | { | |
1056 | char **argp; | |
1057 | ||
1058 | if ((argp = scanvec(argv, "-d")) && (argp[1][0] == '/')) | |
1059 | setCWD(argp[1]); | |
1060 | else | |
1061 | getCWD(); /* After we setup curbuf in case we have to getwd() */ | |
1062 | } | |
1063 | #endif | |
1064 | HomeDir = getenv("HOME"); | |
1065 | if (HomeDir == 0) | |
1066 | HomeDir = "/"; | |
1067 | HomeLen = strlen(HomeDir); | |
1068 | (void) joverc(JOVERC); | |
1069 | if (!scanvec(argv, "-j")) { | |
1070 | char tmpbuf[100]; | |
1071 | ||
1072 | sprintf(tmpbuf, "%s/.joverc", HomeDir); | |
1073 | (void) joverc(tmpbuf); | |
1074 | } | |
1075 | #ifdef SYSV | |
1076 | sprintf(MailBox, "/usr/mail/%s", getenv("LOGNAME")); | |
1077 | #else | |
1078 | sprintf(Mailbox, "/usr/spool/mail/%s", getenv("USER")); | |
1079 | #endif SYSV | |
1080 | (void) time(&time0); | |
1081 | ttinit(); /* initialize terminal (after ~/.joverc) */ | |
1082 | settout(ttbuf); /* not until we know baudrate */ | |
1083 | ResetTerm(); | |
1084 | ||
1085 | (void) signal(SIGHUP, finish); | |
1086 | (void) signal(SIGINT, finish); | |
1087 | (void) signal(SIGQUIT, SIG_IGN); | |
1088 | (void) signal(SIGBUS, finish); | |
1089 | (void) signal(SIGSEGV, finish); | |
1090 | (void) signal(SIGPIPE, finish); | |
1091 | (void) signal(SIGTERM, SIG_IGN); | |
1092 | #ifdef TIOCGWINSZ | |
1093 | #ifdef SIGWINCH | |
1094 | (void) signal(SIGWINCH, win_reshape); | |
1095 | #endif | |
1096 | #endif | |
1097 | ||
1098 | /* set things up to update the modeline every UpdFreq seconds */ | |
1099 | (void) signal(SIGALRM, updmode); | |
1100 | (void) alarm((unsigned) UpdFreq); | |
1101 | ||
1102 | cl_scr(1); | |
1103 | flusho(); | |
1104 | RedrawDisplay(); /* start the redisplay process. */ | |
1105 | DoKeys(0); | |
1106 | finish(0); | |
1107 | } |