Commit | Line | Data |
---|---|---|
19d73a0e DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
5a6c967e | 8 | static char *sccsid = "@(#)ex_subr.c 7.11 (Berkeley) %G%"; |
19d73a0e DF |
9 | #endif not lint |
10 | ||
b6ea9402 MH |
11 | #include "ex.h" |
12 | #include "ex_re.h" | |
13 | #include "ex_tty.h" | |
14 | #include "ex_vis.h" | |
15 | ||
16 | /* | |
17 | * Random routines, in alphabetical order. | |
18 | */ | |
19 | ||
20 | any(c, s) | |
21 | int c; | |
22 | register char *s; | |
23 | { | |
24 | register int x; | |
25 | ||
26 | while (x = *s++) | |
27 | if (x == c) | |
28 | return (1); | |
29 | return (0); | |
30 | } | |
31 | ||
32 | backtab(i) | |
33 | register int i; | |
34 | { | |
35 | register int j; | |
36 | ||
37 | j = i % value(SHIFTWIDTH); | |
38 | if (j == 0) | |
39 | j = value(SHIFTWIDTH); | |
40 | i -= j; | |
41 | if (i < 0) | |
42 | i = 0; | |
43 | return (i); | |
44 | } | |
45 | ||
46 | change() | |
47 | { | |
48 | ||
49 | tchng++; | |
50 | chng = tchng; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Column returns the number of | |
55 | * columns occupied by printing the | |
56 | * characters through position cp of the | |
57 | * current line. | |
58 | */ | |
59 | column(cp) | |
60 | register char *cp; | |
61 | { | |
62 | ||
63 | if (cp == 0) | |
64 | cp = &linebuf[LBSIZE - 2]; | |
65 | return (qcolumn(cp, (char *) 0)); | |
66 | } | |
67 | ||
d266c416 MH |
68 | /* |
69 | * Ignore a comment to the end of the line. | |
70 | * This routine eats the trailing newline so don't call newline(). | |
71 | */ | |
72 | comment() | |
73 | { | |
74 | register int c; | |
75 | ||
76 | do { | |
5a6c967e | 77 | c = ex_getchar(); |
d266c416 MH |
78 | } while (c != '\n' && c != EOF); |
79 | if (c == EOF) | |
80 | ungetchar(c); | |
81 | } | |
82 | ||
b6ea9402 MH |
83 | Copy(to, from, size) |
84 | register char *from, *to; | |
85 | register int size; | |
86 | { | |
87 | ||
88 | if (size > 0) | |
89 | do | |
90 | *to++ = *from++; | |
91 | while (--size > 0); | |
92 | } | |
93 | ||
94 | copyw(to, from, size) | |
95 | register line *from, *to; | |
96 | register int size; | |
97 | { | |
b6ea9402 MH |
98 | if (size > 0) |
99 | do | |
100 | *to++ = *from++; | |
101 | while (--size > 0); | |
102 | } | |
103 | ||
104 | copywR(to, from, size) | |
105 | register line *from, *to; | |
106 | register int size; | |
107 | { | |
108 | ||
109 | while (--size >= 0) | |
110 | to[size] = from[size]; | |
111 | } | |
112 | ||
113 | ctlof(c) | |
114 | int c; | |
115 | { | |
116 | ||
117 | return (c == TRIM ? '?' : c | ('A' - 1)); | |
118 | } | |
119 | ||
120 | dingdong() | |
121 | { | |
122 | ||
123 | if (VB) | |
124 | putpad(VB); | |
125 | else if (value(ERRORBELLS)) | |
126 | putch('\207'); | |
127 | } | |
128 | ||
129 | fixindent(indent) | |
130 | int indent; | |
131 | { | |
132 | register int i; | |
133 | register char *cp; | |
134 | ||
135 | i = whitecnt(genbuf); | |
136 | cp = vpastwh(genbuf); | |
137 | if (*cp == 0 && i == indent && linebuf[0] == 0) { | |
138 | genbuf[0] = 0; | |
139 | return (i); | |
140 | } | |
141 | CP(genindent(i), cp); | |
142 | return (i); | |
143 | } | |
144 | ||
145 | filioerr(cp) | |
146 | char *cp; | |
147 | { | |
148 | register int oerrno = errno; | |
149 | ||
150 | lprintf("\"%s\"", cp); | |
151 | errno = oerrno; | |
152 | syserror(); | |
153 | } | |
154 | ||
155 | char * | |
156 | genindent(indent) | |
157 | register int indent; | |
158 | { | |
159 | register char *cp; | |
160 | ||
161 | for (cp = genbuf; indent >= value(TABSTOP); indent -= value(TABSTOP)) | |
162 | *cp++ = '\t'; | |
163 | for (; indent > 0; indent--) | |
164 | *cp++ = ' '; | |
165 | return (cp); | |
166 | } | |
167 | ||
168 | getDOT() | |
169 | { | |
170 | ||
171 | getline(*dot); | |
172 | } | |
173 | ||
174 | line * | |
175 | getmark(c) | |
176 | register int c; | |
177 | { | |
178 | register line *addr; | |
179 | ||
180 | for (addr = one; addr <= dol; addr++) | |
181 | if (names[c - 'a'] == (*addr &~ 01)) { | |
182 | return (addr); | |
183 | } | |
184 | return (0); | |
185 | } | |
186 | ||
187 | getn(cp) | |
188 | register char *cp; | |
189 | { | |
190 | register int i = 0; | |
191 | ||
192 | while (isdigit(*cp)) | |
193 | i = i * 10 + *cp++ - '0'; | |
194 | if (*cp) | |
195 | return (0); | |
196 | return (i); | |
197 | } | |
198 | ||
199 | ignnEOF() | |
200 | { | |
5a6c967e | 201 | register int c = ex_getchar(); |
b6ea9402 MH |
202 | |
203 | if (c == EOF) | |
204 | ungetchar(c); | |
d266c416 MH |
205 | else if (c=='"') |
206 | comment(); | |
b6ea9402 MH |
207 | } |
208 | ||
209 | iswhite(c) | |
210 | int c; | |
211 | { | |
212 | ||
213 | return (c == ' ' || c == '\t'); | |
214 | } | |
215 | ||
216 | junk(c) | |
217 | register int c; | |
218 | { | |
219 | ||
220 | if (c && !value(BEAUTIFY)) | |
221 | return (0); | |
222 | if (c >= ' ' && c != TRIM) | |
223 | return (0); | |
224 | switch (c) { | |
225 | ||
226 | case '\t': | |
227 | case '\n': | |
228 | case '\f': | |
229 | return (0); | |
230 | ||
231 | default: | |
232 | return (1); | |
233 | } | |
234 | } | |
235 | ||
236 | killed() | |
237 | { | |
238 | ||
239 | killcnt(addr2 - addr1 + 1); | |
240 | } | |
241 | ||
242 | killcnt(cnt) | |
243 | register int cnt; | |
244 | { | |
245 | ||
246 | if (inopen) { | |
247 | notecnt = cnt; | |
248 | notenam = notesgn = ""; | |
249 | return; | |
250 | } | |
251 | if (!notable(cnt)) | |
252 | return; | |
5a6c967e | 253 | ex_printf("%d lines", cnt); |
b6ea9402 | 254 | if (value(TERSE) == 0) { |
5a6c967e | 255 | ex_printf(" %c%s", Command[0] | ' ', Command + 1); |
b6ea9402 | 256 | if (Command[strlen(Command) - 1] != 'e') |
5a6c967e CH |
257 | ex_putchar('e'); |
258 | ex_putchar('d'); | |
b6ea9402 MH |
259 | } |
260 | putNFL(); | |
261 | } | |
262 | ||
263 | lineno(a) | |
264 | line *a; | |
265 | { | |
266 | ||
267 | return (a - zero); | |
268 | } | |
269 | ||
270 | lineDOL() | |
271 | { | |
272 | ||
273 | return (lineno(dol)); | |
274 | } | |
275 | ||
276 | lineDOT() | |
277 | { | |
278 | ||
279 | return (lineno(dot)); | |
280 | } | |
281 | ||
282 | markDOT() | |
283 | { | |
284 | ||
285 | markpr(dot); | |
286 | } | |
287 | ||
288 | markpr(which) | |
289 | line *which; | |
290 | { | |
291 | ||
292 | if ((inglobal == 0 || inopen) && which <= endcore) { | |
293 | names['z'-'a'+1] = *which & ~01; | |
294 | if (inopen) | |
295 | ncols['z'-'a'+1] = cursor; | |
296 | } | |
297 | } | |
298 | ||
299 | markreg(c) | |
300 | register int c; | |
301 | { | |
302 | ||
303 | if (c == '\'' || c == '`') | |
304 | return ('z' + 1); | |
305 | if (c >= 'a' && c <= 'z') | |
306 | return (c); | |
307 | return (0); | |
308 | } | |
309 | ||
310 | /* | |
311 | * Mesg decodes the terse/verbose strings. Thus | |
312 | * 'xxx@yyy' -> 'xxx' if terse, else 'xxx yyy' | |
313 | * 'xxx|yyy' -> 'xxx' if terse, else 'yyy' | |
314 | * All others map to themselves. | |
315 | */ | |
316 | char * | |
317 | mesg(str) | |
318 | register char *str; | |
319 | { | |
320 | register char *cp; | |
321 | ||
322 | str = strcpy(genbuf, str); | |
323 | for (cp = str; *cp; cp++) | |
324 | switch (*cp) { | |
325 | ||
326 | case '@': | |
327 | if (value(TERSE)) | |
328 | *cp = 0; | |
329 | else | |
330 | *cp = ' '; | |
331 | break; | |
332 | ||
333 | case '|': | |
334 | if (value(TERSE) == 0) | |
335 | return (cp + 1); | |
336 | *cp = 0; | |
337 | break; | |
338 | } | |
339 | return (str); | |
340 | } | |
341 | ||
342 | /*VARARGS2*/ | |
343 | merror(seekpt, i) | |
5a6c967e | 344 | #ifndef EXSTRINGS |
b6ea9402 MH |
345 | char *seekpt; |
346 | #else | |
44232d5b MH |
347 | # ifdef lint |
348 | char *seekpt; | |
349 | # else | |
b6ea9402 | 350 | int seekpt; |
44232d5b | 351 | # endif |
b6ea9402 MH |
352 | #endif |
353 | int i; | |
354 | { | |
355 | register char *cp = linebuf; | |
356 | ||
357 | if (seekpt == 0) | |
358 | return; | |
359 | merror1(seekpt); | |
360 | if (*cp == '\n') | |
361 | putnl(), cp++; | |
cb3ac212 | 362 | if (inopen > 0 && CE) |
b6ea9402 MH |
363 | vclreol(); |
364 | if (SO && SE) | |
365 | putpad(SO); | |
5a6c967e | 366 | ex_printf(mesg(cp), i); |
b6ea9402 MH |
367 | if (SO && SE) |
368 | putpad(SE); | |
369 | } | |
370 | ||
371 | merror1(seekpt) | |
5a6c967e | 372 | #ifndef EXSTRINGS |
b6ea9402 MH |
373 | char *seekpt; |
374 | #else | |
44232d5b MH |
375 | # ifdef lint |
376 | char *seekpt; | |
377 | # else | |
b6ea9402 | 378 | int seekpt; |
44232d5b | 379 | # endif |
b6ea9402 MH |
380 | #endif |
381 | { | |
382 | ||
5a6c967e | 383 | #ifndef EXSTRINGS |
44232d5b MH |
384 | strcpy(linebuf, seekpt); |
385 | #else | |
b6ea9402 MH |
386 | lseek(erfile, (long) seekpt, 0); |
387 | if (read(erfile, linebuf, 128) < 2) | |
388 | CP(linebuf, "ERROR"); | |
44232d5b | 389 | #endif |
b6ea9402 MH |
390 | } |
391 | ||
392 | morelines() | |
393 | { | |
5a6c967e CH |
394 | #ifdef UNIX_SBRK |
395 | char *sbrk(); | |
b6ea9402 MH |
396 | |
397 | if ((int) sbrk(1024 * sizeof (line)) == -1) | |
398 | return (-1); | |
399 | endcore += 1024; | |
400 | return (0); | |
5a6c967e CH |
401 | #else |
402 | /* | |
403 | * We can never be guaranteed that we can get more memory | |
404 | * beyond "endcore". So we just punt every time. | |
405 | */ | |
406 | return -1; | |
407 | #endif | |
b6ea9402 MH |
408 | } |
409 | ||
410 | nonzero() | |
411 | { | |
412 | ||
413 | if (addr1 == zero) { | |
414 | notempty(); | |
415 | error("Nonzero address required@on this command"); | |
416 | } | |
417 | } | |
418 | ||
419 | notable(i) | |
420 | int i; | |
421 | { | |
422 | ||
423 | return (hush == 0 && !inglobal && i > value(REPORT)); | |
424 | } | |
425 | ||
426 | ||
427 | notempty() | |
428 | { | |
429 | ||
430 | if (dol == zero) | |
431 | error("No lines@in the buffer"); | |
432 | } | |
433 | ||
434 | ||
435 | netchHAD(cnt) | |
436 | int cnt; | |
437 | { | |
438 | ||
439 | netchange(lineDOL() - cnt); | |
440 | } | |
441 | ||
442 | netchange(i) | |
443 | register int i; | |
444 | { | |
445 | register char *cp; | |
446 | ||
447 | if (i > 0) | |
448 | notesgn = cp = "more "; | |
449 | else | |
450 | notesgn = cp = "fewer ", i = -i; | |
451 | if (inopen) { | |
452 | notecnt = i; | |
453 | notenam = ""; | |
454 | return; | |
455 | } | |
456 | if (!notable(i)) | |
457 | return; | |
5a6c967e | 458 | ex_printf(mesg("%d %slines@in file after %s"), i, cp, Command); |
b6ea9402 MH |
459 | putNFL(); |
460 | } | |
461 | ||
462 | putmark(addr) | |
463 | line *addr; | |
464 | { | |
465 | ||
466 | putmk1(addr, putline()); | |
467 | } | |
468 | ||
469 | putmk1(addr, n) | |
470 | register line *addr; | |
471 | int n; | |
472 | { | |
473 | register line *markp; | |
d266c416 | 474 | register oldglobmk; |
b6ea9402 | 475 | |
d266c416 | 476 | oldglobmk = *addr & 1; |
b6ea9402 MH |
477 | *addr &= ~1; |
478 | for (markp = (anymarks ? names : &names['z'-'a'+1]); | |
479 | markp <= &names['z'-'a'+1]; markp++) | |
480 | if (*markp == *addr) | |
481 | *markp = n; | |
d266c416 | 482 | *addr = n | oldglobmk; |
b6ea9402 MH |
483 | } |
484 | ||
485 | char * | |
486 | plural(i) | |
487 | long i; | |
488 | { | |
489 | ||
490 | return (i == 1 ? "" : "s"); | |
491 | } | |
492 | ||
493 | int qcount(); | |
494 | short vcntcol; | |
495 | ||
496 | qcolumn(lim, gp) | |
497 | register char *lim, *gp; | |
498 | { | |
499 | register int x; | |
500 | int (*OO)(); | |
501 | ||
502 | OO = Outchar; | |
503 | Outchar = qcount; | |
504 | vcntcol = 0; | |
505 | if (lim != NULL) | |
506 | x = lim[1], lim[1] = 0; | |
507 | pline(0); | |
508 | if (lim != NULL) | |
509 | lim[1] = x; | |
510 | if (gp) | |
511 | while (*gp) | |
5a6c967e | 512 | ex_putchar(*gp++); |
b6ea9402 MH |
513 | Outchar = OO; |
514 | return (vcntcol); | |
515 | } | |
516 | ||
517 | int | |
518 | qcount(c) | |
519 | int c; | |
520 | { | |
521 | ||
522 | if (c == '\t') { | |
523 | vcntcol += value(TABSTOP) - vcntcol % value(TABSTOP); | |
524 | return; | |
525 | } | |
526 | vcntcol++; | |
527 | } | |
528 | ||
529 | reverse(a1, a2) | |
530 | register line *a1, *a2; | |
531 | { | |
532 | register line t; | |
533 | ||
534 | for (;;) { | |
535 | t = *--a2; | |
536 | if (a2 <= a1) | |
537 | return; | |
538 | *a2 = *a1; | |
539 | *a1++ = t; | |
540 | } | |
541 | } | |
542 | ||
543 | save(a1, a2) | |
544 | line *a1; | |
545 | register line *a2; | |
546 | { | |
547 | register int more; | |
548 | ||
887e3e0d MH |
549 | if (!FIXUNDO) |
550 | return; | |
551 | #ifdef TRACE | |
552 | if (trace) | |
553 | vudump("before save"); | |
554 | #endif | |
b6ea9402 MH |
555 | undkind = UNDNONE; |
556 | undadot = dot; | |
557 | more = (a2 - a1 + 1) - (unddol - dol); | |
558 | while (more > (endcore - truedol)) | |
559 | if (morelines() < 0) | |
5a6c967e | 560 | #ifdef UNIX_SBRK |
04379bab | 561 | error("Out of memory@saving lines for undo - try using ed"); |
5a6c967e CH |
562 | #else |
563 | error("Out of memory@saving lines for undo - try increasing linelimit"); | |
564 | #endif | |
b6ea9402 MH |
565 | if (more) |
566 | (*(more > 0 ? copywR : copyw))(unddol + more + 1, unddol + 1, | |
567 | (truedol - unddol)); | |
568 | unddol += more; | |
569 | truedol += more; | |
570 | copyw(dol + 1, a1, a2 - a1 + 1); | |
571 | undkind = UNDALL; | |
572 | unddel = a1 - 1; | |
573 | undap1 = a1; | |
574 | undap2 = a2 + 1; | |
887e3e0d MH |
575 | #ifdef TRACE |
576 | if (trace) | |
577 | vudump("after save"); | |
578 | #endif | |
b6ea9402 MH |
579 | } |
580 | ||
581 | save12() | |
582 | { | |
583 | ||
584 | save(addr1, addr2); | |
585 | } | |
586 | ||
587 | saveall() | |
588 | { | |
589 | ||
590 | save(one, dol); | |
591 | } | |
592 | ||
593 | span() | |
594 | { | |
595 | ||
596 | return (addr2 - addr1 + 1); | |
597 | } | |
598 | ||
5a6c967e | 599 | ex_sync() |
b6ea9402 MH |
600 | { |
601 | ||
602 | chng = 0; | |
603 | tchng = 0; | |
604 | xchng = 0; | |
605 | } | |
606 | ||
607 | ||
608 | skipwh() | |
609 | { | |
610 | register int wh; | |
611 | ||
612 | wh = 0; | |
613 | while (iswhite(peekchar())) { | |
614 | wh++; | |
615 | ignchar(); | |
616 | } | |
617 | return (wh); | |
618 | } | |
619 | ||
620 | /*VARARGS2*/ | |
621 | smerror(seekpt, cp) | |
622 | #ifdef lint | |
623 | char *seekpt; | |
624 | #else | |
625 | int seekpt; | |
626 | #endif | |
627 | char *cp; | |
628 | { | |
629 | ||
630 | if (seekpt == 0) | |
631 | return; | |
632 | merror1(seekpt); | |
633 | if (inopen && CE) | |
634 | vclreol(); | |
635 | if (SO && SE) | |
636 | putpad(SO); | |
637 | lprintf(mesg(linebuf), cp); | |
638 | if (SO && SE) | |
639 | putpad(SE); | |
640 | } | |
641 | ||
b6ea9402 MH |
642 | char * |
643 | strend(cp) | |
644 | register char *cp; | |
645 | { | |
646 | ||
647 | while (*cp) | |
648 | cp++; | |
649 | return (cp); | |
650 | } | |
651 | ||
652 | strcLIN(dp) | |
653 | char *dp; | |
654 | { | |
655 | ||
656 | CP(linebuf, dp); | |
657 | } | |
658 | ||
659 | syserror() | |
660 | { | |
661 | register int e = errno; | |
5a6c967e | 662 | #ifndef vms |
ecfce8ed RC |
663 | extern int sys_nerr; |
664 | extern char *sys_errlist[]; | |
5a6c967e CH |
665 | #else |
666 | extern noshare int sys_nerr; | |
667 | extern noshare char *sys_errlist[]; | |
668 | #endif | |
b6ea9402 MH |
669 | |
670 | dirtcnt = 0; | |
5a6c967e | 671 | ex_putchar(' '); |
ecfce8ed RC |
672 | if (e >= 0 && e <= sys_nerr) |
673 | error(sys_errlist[e]); | |
b6ea9402 | 674 | else |
5a6c967e CH |
675 | #ifdef vms |
676 | if (e == EVMSERR) { | |
677 | error("VMS system error %d", vaxc$errno); | |
678 | perror("vmserror"); | |
679 | } | |
680 | else | |
681 | #endif | |
b6ea9402 MH |
682 | error("System error %d", e); |
683 | } | |
684 | ||
d266c416 MH |
685 | /* |
686 | * Return the column number that results from being in column col and | |
687 | * hitting a tab, where tabs are set every ts columns. Work right for | |
688 | * the case where col > COLUMNS, even if ts does not divide COLUMNS. | |
689 | */ | |
690 | tabcol(col, ts) | |
691 | int col, ts; | |
692 | { | |
693 | int offset, result; | |
694 | ||
695 | if (col >= COLUMNS) { | |
696 | offset = COLUMNS * (col/COLUMNS); | |
697 | col -= offset; | |
698 | } else | |
699 | offset = 0; | |
700 | result = col + ts - (col % ts) + offset; | |
701 | return (result); | |
702 | } | |
703 | ||
b6ea9402 MH |
704 | char * |
705 | vfindcol(i) | |
706 | int i; | |
707 | { | |
708 | register char *cp; | |
709 | register int (*OO)() = Outchar; | |
710 | ||
711 | Outchar = qcount; | |
712 | ignore(qcolumn(linebuf - 1, NOSTR)); | |
713 | for (cp = linebuf; *cp && vcntcol < i; cp++) | |
5a6c967e | 714 | ex_putchar(*cp); |
b6ea9402 MH |
715 | if (cp != linebuf) |
716 | cp--; | |
717 | Outchar = OO; | |
718 | return (cp); | |
719 | } | |
720 | ||
721 | char * | |
722 | vskipwh(cp) | |
723 | register char *cp; | |
724 | { | |
725 | ||
726 | while (iswhite(*cp) && cp[1]) | |
727 | cp++; | |
728 | return (cp); | |
729 | } | |
730 | ||
731 | ||
732 | char * | |
733 | vpastwh(cp) | |
734 | register char *cp; | |
735 | { | |
736 | ||
737 | while (iswhite(*cp)) | |
738 | cp++; | |
739 | return (cp); | |
740 | } | |
741 | ||
742 | whitecnt(cp) | |
743 | register char *cp; | |
744 | { | |
745 | register int i; | |
746 | ||
747 | i = 0; | |
748 | for (;;) | |
749 | switch (*cp++) { | |
750 | ||
751 | case '\t': | |
752 | i += value(TABSTOP) - i % value(TABSTOP); | |
753 | break; | |
754 | ||
755 | case ' ': | |
756 | i++; | |
757 | break; | |
758 | ||
759 | default: | |
760 | return (i); | |
761 | } | |
762 | } | |
763 | ||
764 | #ifdef lint | |
765 | Ignore(a) | |
766 | char *a; | |
767 | { | |
768 | ||
769 | a = a; | |
770 | } | |
771 | ||
772 | Ignorf(a) | |
773 | int (*a)(); | |
774 | { | |
775 | ||
776 | a = a; | |
777 | } | |
778 | #endif | |
779 | ||
780 | markit(addr) | |
781 | line *addr; | |
782 | { | |
783 | ||
784 | if (addr != dot && addr >= one && addr <= dol) | |
785 | markDOT(); | |
786 | } | |
9d962274 MH |
787 | |
788 | /* | |
789 | * The following code is defensive programming against a bug in the | |
790 | * pdp-11 overlay implementation. Sometimes it goes nuts and asks | |
791 | * for an overlay with some garbage number, which generates an emt | |
792 | * trap. This is a less than elegant solution, but it is somewhat | |
793 | * better than core dumping and losing your work, leaving your tty | |
794 | * in a weird state, etc. | |
795 | */ | |
796 | int _ovno; | |
797 | onemt() | |
798 | { | |
9d962274 | 799 | signal(SIGEMT, onemt); |
9d962274 MH |
800 | /* 2 and 3 are valid on 11/40 type vi, so */ |
801 | if (_ovno < 0 || _ovno > 3) | |
802 | _ovno = 0; | |
803 | error("emt trap, _ovno is %d @ - try again"); | |
804 | } | |
16fb7022 MH |
805 | |
806 | /* | |
807 | * When a hangup occurs our actions are similar to a preserve | |
808 | * command. If the buffer has not been [Modified], then we do | |
809 | * nothing but remove the temporary files and exit. | |
810 | * Otherwise, we sync the temp file and then attempt a preserve. | |
811 | * If the preserve succeeds, we unlink our temp files. | |
812 | * If the preserve fails, we leave the temp files as they are | |
813 | * as they are a backup even without preservation if they | |
814 | * are not removed. | |
815 | */ | |
816 | onhup() | |
817 | { | |
818 | ||
819 | /* | |
820 | * USG tty driver can send multiple HUP's!! | |
821 | */ | |
822 | signal(SIGINT, SIG_IGN); | |
823 | signal(SIGHUP, SIG_IGN); | |
824 | if (chng == 0) { | |
825 | cleanup(1); | |
5a6c967e | 826 | ex_exit(0); |
16fb7022 MH |
827 | } |
828 | if (setexit() == 0) { | |
829 | if (preserve()) { | |
830 | cleanup(1); | |
5a6c967e | 831 | ex_exit(0); |
16fb7022 MH |
832 | } |
833 | } | |
5a6c967e | 834 | ex_exit(1); |
16fb7022 MH |
835 | } |
836 | ||
837 | /* | |
838 | * An interrupt occurred. Drain any output which | |
839 | * is still in the output buffering pipeline. | |
840 | * Catch interrupts again. Unless we are in visual | |
841 | * reset the output state (out of -nl mode, e.g). | |
842 | * Then like a normal error (with the \n before Interrupt | |
843 | * suppressed in visual mode). | |
844 | */ | |
845 | onintr() | |
846 | { | |
847 | ||
848 | #ifndef CBREAK | |
849 | signal(SIGINT, onintr); | |
850 | #else | |
851 | signal(SIGINT, inopen ? vintr : onintr); | |
852 | #endif | |
299f2784 | 853 | alarm(0); /* in case we were called from map */ |
16fb7022 MH |
854 | draino(); |
855 | if (!inopen) { | |
856 | pstop(); | |
857 | setlastchar('\n'); | |
858 | #ifdef CBREAK | |
859 | } | |
860 | #else | |
861 | } else | |
862 | vraw(); | |
863 | #endif | |
864 | error("\nInterrupt" + inopen); | |
865 | } | |
866 | ||
867 | /* | |
868 | * If we are interruptible, enable interrupts again. | |
869 | * In some critical sections we turn interrupts off, | |
870 | * but not very often. | |
871 | */ | |
872 | setrupt() | |
873 | { | |
874 | ||
875 | if (ruptible) { | |
876 | #ifndef CBREAK | |
877 | signal(SIGINT, onintr); | |
878 | #else | |
879 | signal(SIGINT, inopen ? vintr : onintr); | |
880 | #endif | |
881 | #ifdef SIGTSTP | |
882 | if (dosusp) | |
883 | signal(SIGTSTP, onsusp); | |
884 | #endif | |
885 | } | |
886 | } | |
887 | ||
888 | preserve() | |
889 | { | |
890 | ||
891 | #ifdef VMUNIX | |
892 | tflush(); | |
893 | #endif | |
894 | synctmp(); | |
5a6c967e | 895 | pid = vfork(); |
16fb7022 MH |
896 | if (pid < 0) |
897 | return (0); | |
898 | if (pid == 0) { | |
899 | close(0); | |
900 | dup(tfile); | |
901 | execl(EXPRESERVE, "expreserve", (char *) 0); | |
5a6c967e | 902 | ex_exit(1); |
16fb7022 MH |
903 | } |
904 | waitfor(); | |
905 | if (rpid == pid && status == 0) | |
906 | return (1); | |
907 | return (0); | |
908 | } | |
909 | ||
910 | #ifndef V6 | |
5a6c967e | 911 | ex_exit(i) |
16fb7022 MH |
912 | int i; |
913 | { | |
914 | ||
915 | # ifdef TRACE | |
916 | if (trace) | |
917 | fclose(trace); | |
918 | # endif | |
919 | _exit(i); | |
920 | } | |
921 | #endif | |
922 | ||
923 | #ifdef SIGTSTP | |
924 | /* | |
925 | * We have just gotten a susp. Suspend and prepare to resume. | |
926 | */ | |
927 | onsusp() | |
928 | { | |
929 | ttymode f; | |
f8305ab2 | 930 | struct winsize win; |
16fb7022 MH |
931 | |
932 | f = setty(normf); | |
933 | vnfl(); | |
934 | putpad(TE); | |
935 | flush(); | |
936 | ||
2ec23540 | 937 | (void) sigsetmask(0); |
16fb7022 MH |
938 | signal(SIGTSTP, SIG_DFL); |
939 | kill(0, SIGTSTP); | |
940 | ||
941 | /* the pc stops here */ | |
942 | ||
943 | signal(SIGTSTP, onsusp); | |
944 | vcontin(0); | |
5a6c967e | 945 | ignore(setty(f)); |
16fb7022 | 946 | if (!inopen) |
5a6c967e | 947 | error((char *) 0); |
16fb7022 | 948 | else { |
5a6c967e | 949 | #ifdef TIOCGWINSZ |
f8305ab2 | 950 | if (ioctl(0, TIOCGWINSZ, &win) >= 0) |
0151ea50 SL |
951 | if (win.ws_row != winsz.ws_row || |
952 | win.ws_col != winsz.ws_col) | |
f8305ab2 | 953 | winch(); |
5a6c967e | 954 | #endif |
16fb7022 MH |
955 | if (vcnt < 0) { |
956 | vcnt = -vcnt; | |
957 | if (state == VISUAL) | |
958 | vclear(); | |
959 | else if (state == CRTOPEN) | |
960 | vcnt = 0; | |
961 | } | |
962 | vdirty(0, LINES); | |
963 | vrepaint(cursor); | |
964 | } | |
965 | } | |
60b36ddb | 966 | #endif |