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ecc449eb KB |
1 | /*- |
2 | * Copyright (c) 1980, 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
b79f4fa9 DF |
6 | */ |
7 | ||
5b182e7a | 8 | #ifndef lint |
454c2aa3 | 9 | static char sccsid[] = "@(#)lex.c 5.17 (Berkeley) %G%"; |
b9c4f741 | 10 | #endif /* not lint */ |
3802e2ef | 11 | |
b9c4f741 KB |
12 | #include <sys/types.h> |
13 | #include <sys/ioctl.h> | |
14 | #include <termios.h> | |
15 | #include <errno.h> | |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
18 | #include <unistd.h> | |
4df6491c CZ |
19 | #if __STDC__ |
20 | # include <stdarg.h> | |
21 | #else | |
22 | # include <varargs.h> | |
23 | #endif | |
24 | ||
4d7b2685 KB |
25 | #include "csh.h" |
26 | #include "extern.h" | |
3802e2ef BJ |
27 | |
28 | /* | |
29 | * These lexical routines read input and form lists of words. | |
30 | * There is some involved processing here, because of the complications | |
31 | * of input buffering, and especially because of history substitution. | |
32 | */ | |
33 | ||
0aec749d CZ |
34 | static Char *word __P((void)); |
35 | static int getC1 __P((int)); | |
36 | static void getdol __P((void)); | |
37 | static void getexcl __P((int)); | |
38 | static struct Hist | |
39 | *findev __P((Char *, bool)); | |
40 | static void setexclp __P((Char *)); | |
41 | static int bgetc __P((void)); | |
42 | static void bfree __P((void)); | |
43 | static struct wordent | |
44 | *gethent __P((int)); | |
45 | static int matchs __P((Char *, Char *)); | |
46 | static int getsel __P((int *, int *, int)); | |
47 | static struct wordent | |
48 | *getsub __P((struct wordent *)); | |
49 | static Char *subword __P((Char *, int, bool *)); | |
50 | static struct wordent | |
51 | *dosub __P((int, struct wordent *, bool)); | |
3802e2ef BJ |
52 | |
53 | /* | |
6e37afca | 54 | * Peekc is a peek character for getC, peekread for readc. |
3802e2ef BJ |
55 | * There is a subtlety here in many places... history routines |
56 | * will read ahead and then insert stuff into the input stream. | |
57 | * If they push back a character then they must push it behind | |
58 | * the text substituted by the history substitution. On the other | |
59 | * hand in several places we need 2 peek characters. To make this | |
60 | * all work, the history routines read with getC, and make use both | |
61 | * of ungetC and unreadc. The key observation is that the state | |
62 | * of getC at the call of a history reference is such that calls | |
63 | * to getC from the history routines will always yield calls of | |
64 | * readc, unless this peeking is involved. That is to say that during | |
65 | * getexcl the variables lap, exclp, and exclnxt are all zero. | |
66 | * | |
67 | * Getdol invokes history substitution, hence the extra peek, peekd, | |
68 | * which it can ungetD to be before history substitutions. | |
69 | */ | |
6e37afca KB |
70 | static Char peekc = 0, peekd = 0; |
71 | static Char peekread = 0; | |
72 | ||
73 | /* (Tail of) current word from ! subst */ | |
b9c4f741 | 74 | static Char *exclp = NULL; |
6e37afca KB |
75 | |
76 | /* The rest of the ! subst words */ | |
b9c4f741 | 77 | static struct wordent *exclnxt = NULL; |
3802e2ef | 78 | |
6e37afca KB |
79 | /* Count of remaining words in ! subst */ |
80 | static int exclc = 0; | |
81 | ||
82 | /* "Globp" for alias resubstitution */ | |
b9c4f741 | 83 | static Char *alvecp = NULL; |
6e37afca KB |
84 | |
85 | /* | |
86 | * Labuf implements a general buffer for lookahead during lexical operations. | |
87 | * Text which is to be placed in the input stream can be stuck here. | |
88 | * We stick parsed ahead $ constructs during initial input, | |
89 | * process id's from `$$', and modified variable values (from qualifiers | |
90 | * during expansion in sh.dol.c) here. | |
91 | */ | |
92 | static Char labuf[BUFSIZ]; | |
3802e2ef BJ |
93 | |
94 | /* | |
95 | * Lex returns to its caller not only a wordlist (as a "var" parameter) | |
96 | * but also whether a history substitution occurred. This is used in | |
97 | * the main (process) routine to determine whether to echo, and also | |
98 | * when called by the alias routine to determine whether to keep the | |
99 | * argument list. | |
100 | */ | |
6e37afca KB |
101 | static bool hadhist = 0; |
102 | ||
103 | /* | |
104 | * Avoid alias expansion recursion via \!# | |
105 | */ | |
106 | int hleft; | |
107 | ||
108 | static Char getCtmp; | |
3802e2ef | 109 | |
35371dec | 110 | #define getC(f) ((getCtmp = peekc) ? (peekc = 0, getCtmp) : getC1(f)) |
3802e2ef BJ |
111 | #define ungetC(c) peekc = c |
112 | #define ungetD(c) peekd = c | |
113 | ||
6e37afca | 114 | int |
3802e2ef | 115 | lex(hp) |
6e37afca | 116 | register struct wordent *hp; |
3802e2ef | 117 | { |
6e37afca KB |
118 | register struct wordent *wdp; |
119 | int c; | |
120 | ||
4d7b2685 | 121 | lineloc = fseekp; |
6e37afca KB |
122 | hp->next = hp->prev = hp; |
123 | hp->word = STRNULL; | |
124 | alvecp = 0, hadhist = 0; | |
125 | do | |
126 | c = readc(0); | |
127 | while (c == ' ' || c == '\t'); | |
128 | if (c == HISTSUB && intty) | |
129 | /* ^lef^rit from tty is short !:s^lef^rit */ | |
130 | getexcl(c); | |
131 | else | |
132 | unreadc(c); | |
133 | wdp = hp; | |
134 | /* | |
135 | * The following loop is written so that the links needed by freelex will | |
136 | * be ready and rarin to go even if it is interrupted. | |
137 | */ | |
138 | do { | |
139 | register struct wordent *new; | |
140 | ||
141 | new = (struct wordent *) xmalloc((size_t) sizeof(*wdp)); | |
142 | new->word = 0; | |
143 | new->prev = wdp; | |
144 | new->next = hp; | |
145 | wdp->next = new; | |
146 | wdp = new; | |
147 | wdp->word = word(); | |
148 | } while (wdp->word[0] != '\n'); | |
149 | hp->prev = wdp; | |
150 | return (hadhist); | |
3802e2ef BJ |
151 | } |
152 | ||
6e37afca | 153 | void |
454c2aa3 CZ |
154 | prlex(fp, sp0) |
155 | FILE *fp; | |
6e37afca | 156 | struct wordent *sp0; |
3802e2ef | 157 | { |
6e37afca KB |
158 | register struct wordent *sp = sp0->next; |
159 | ||
160 | for (;;) { | |
454c2aa3 | 161 | (void) fprintf(fp, "%s", short2str(sp->word)); |
6e37afca KB |
162 | sp = sp->next; |
163 | if (sp == sp0) | |
164 | break; | |
165 | if (sp->word[0] != '\n') | |
454c2aa3 | 166 | (void) fputc(' ', fp); |
6e37afca | 167 | } |
3802e2ef BJ |
168 | } |
169 | ||
6e37afca | 170 | void |
3802e2ef | 171 | copylex(hp, fp) |
6e37afca KB |
172 | register struct wordent *hp; |
173 | register struct wordent *fp; | |
3802e2ef | 174 | { |
6e37afca KB |
175 | register struct wordent *wdp; |
176 | ||
177 | wdp = hp; | |
178 | fp = fp->next; | |
179 | do { | |
180 | register struct wordent *new; | |
181 | ||
182 | new = (struct wordent *) xmalloc((size_t) sizeof(*wdp)); | |
183 | new->prev = wdp; | |
184 | new->next = hp; | |
185 | wdp->next = new; | |
186 | wdp = new; | |
187 | wdp->word = Strsave(fp->word); | |
3802e2ef | 188 | fp = fp->next; |
6e37afca KB |
189 | } while (wdp->word[0] != '\n'); |
190 | hp->prev = wdp; | |
3802e2ef BJ |
191 | } |
192 | ||
6e37afca | 193 | void |
3802e2ef | 194 | freelex(vp) |
6e37afca | 195 | register struct wordent *vp; |
3802e2ef | 196 | { |
6e37afca KB |
197 | register struct wordent *fp; |
198 | ||
199 | while (vp->next != vp) { | |
200 | fp = vp->next; | |
201 | vp->next = fp->next; | |
202 | xfree((ptr_t) fp->word); | |
203 | xfree((ptr_t) fp); | |
204 | } | |
205 | vp->prev = vp; | |
3802e2ef BJ |
206 | } |
207 | ||
6e37afca | 208 | static Char * |
3802e2ef BJ |
209 | word() |
210 | { | |
6e37afca KB |
211 | register Char c, c1; |
212 | register Char *wp; | |
213 | Char wbuf[BUFSIZ]; | |
214 | register bool dolflg; | |
215 | register int i; | |
216 | ||
217 | wp = wbuf; | |
218 | i = BUFSIZ - 4; | |
3802e2ef | 219 | loop: |
6e37afca KB |
220 | while ((c = getC(DOALL)) == ' ' || c == '\t'); |
221 | if (cmap(c, _META | _ESC)) | |
222 | switch (c) { | |
223 | case '&': | |
224 | case '|': | |
225 | case '<': | |
226 | case '>': | |
227 | *wp++ = c; | |
228 | c1 = getC(DOALL); | |
229 | if (c1 == c) | |
230 | *wp++ = c1; | |
231 | else | |
232 | ungetC(c1); | |
233 | goto ret; | |
234 | ||
235 | case '#': | |
236 | if (intty) | |
237 | break; | |
238 | c = 0; | |
239 | do { | |
240 | c1 = c; | |
241 | c = getC(0); | |
242 | } while (c != '\n'); | |
243 | if (c1 == '\\') | |
244 | goto loop; | |
245 | /* fall into ... */ | |
246 | ||
247 | case ';': | |
248 | case '(': | |
249 | case ')': | |
250 | case '\n': | |
251 | *wp++ = c; | |
252 | goto ret; | |
253 | ||
254 | case '\\': | |
255 | c = getC(0); | |
256 | if (c == '\n') { | |
257 | if (onelflg == 1) | |
258 | onelflg = 2; | |
259 | goto loop; | |
260 | } | |
261 | if (c != HIST) | |
262 | *wp++ = '\\', --i; | |
263 | c |= QUOTE; | |
264 | } | |
265 | c1 = 0; | |
266 | dolflg = DOALL; | |
267 | for (;;) { | |
268 | if (c1) { | |
269 | if (c == c1) { | |
270 | c1 = 0; | |
271 | dolflg = DOALL; | |
272 | } | |
273 | else if (c == '\\') { | |
274 | c = getC(0); | |
275 | if (c == HIST) | |
276 | c |= QUOTE; | |
277 | else { | |
278 | if (c == '\n') | |
279 | /* | |
280 | * if (c1 == '`') c = ' '; else | |
281 | */ | |
3802e2ef | 282 | c |= QUOTE; |
6e37afca KB |
283 | ungetC(c); |
284 | c = '\\'; | |
3802e2ef | 285 | } |
6e37afca KB |
286 | } |
287 | else if (c == '\n') { | |
288 | seterror(ERR_UNMATCHED, c1); | |
289 | ungetC(c); | |
290 | break; | |
291 | } | |
292 | } | |
293 | else if (cmap(c, _META | _Q | _Q1 | _ESC)) { | |
294 | if (c == '\\') { | |
295 | c = getC(0); | |
296 | if (c == '\n') { | |
297 | if (onelflg == 1) | |
298 | onelflg = 2; | |
299 | break; | |
3802e2ef | 300 | } |
6e37afca KB |
301 | if (c != HIST) |
302 | *wp++ = '\\', --i; | |
303 | c |= QUOTE; | |
304 | } | |
305 | else if (cmap(c, _Q | _Q1)) { /* '"` */ | |
306 | c1 = c; | |
307 | dolflg = c == '"' ? DOALL : DOEXCL; | |
308 | } | |
309 | else if (c != '#' || !intty) { | |
310 | ungetC(c); | |
311 | break; | |
312 | } | |
313 | } | |
314 | if (--i > 0) { | |
315 | *wp++ = c; | |
316 | c = getC(dolflg); | |
317 | } | |
318 | else { | |
319 | seterror(ERR_WTOOLONG); | |
320 | wp = &wbuf[1]; | |
321 | break; | |
3802e2ef | 322 | } |
6e37afca | 323 | } |
3802e2ef | 324 | ret: |
6e37afca KB |
325 | *wp = 0; |
326 | return (Strsave(wbuf)); | |
3802e2ef BJ |
327 | } |
328 | ||
6e37afca | 329 | static int |
35371dec | 330 | getC1(flag) |
6e37afca | 331 | register int flag; |
3802e2ef | 332 | { |
6e37afca | 333 | register Char c; |
3802e2ef | 334 | |
6e37afca | 335 | while (1) { |
3802e2ef | 336 | if (c = peekc) { |
6e37afca KB |
337 | peekc = 0; |
338 | return (c); | |
3802e2ef BJ |
339 | } |
340 | if (lap) { | |
6e37afca KB |
341 | if ((c = *lap++) == 0) |
342 | lap = 0; | |
343 | else { | |
344 | if (cmap(c, _META | _Q | _Q1)) | |
345 | c |= QUOTE; | |
346 | return (c); | |
347 | } | |
3802e2ef BJ |
348 | } |
349 | if (c = peekd) { | |
6e37afca KB |
350 | peekd = 0; |
351 | return (c); | |
3802e2ef BJ |
352 | } |
353 | if (exclp) { | |
6e37afca KB |
354 | if (c = *exclp++) |
355 | return (c); | |
356 | if (exclnxt && --exclc >= 0) { | |
357 | exclnxt = exclnxt->next; | |
358 | setexclp(exclnxt->word); | |
359 | return (' '); | |
360 | } | |
361 | exclp = 0; | |
362 | exclnxt = 0; | |
3802e2ef BJ |
363 | } |
364 | if (exclnxt) { | |
6e37afca KB |
365 | exclnxt = exclnxt->next; |
366 | if (--exclc < 0) | |
367 | exclnxt = 0; | |
368 | else | |
369 | setexclp(exclnxt->word); | |
370 | continue; | |
3802e2ef BJ |
371 | } |
372 | c = readc(0); | |
373 | if (c == '$' && (flag & DODOL)) { | |
6e37afca KB |
374 | getdol(); |
375 | continue; | |
3802e2ef BJ |
376 | } |
377 | if (c == HIST && (flag & DOEXCL)) { | |
6e37afca KB |
378 | getexcl(0); |
379 | continue; | |
3802e2ef | 380 | } |
6e37afca KB |
381 | break; |
382 | } | |
383 | return (c); | |
3802e2ef BJ |
384 | } |
385 | ||
6e37afca | 386 | static void |
3802e2ef BJ |
387 | getdol() |
388 | { | |
6e37afca KB |
389 | register Char *np, *ep; |
390 | Char name[4 * MAXVARLEN + 1]; | |
391 | register int c; | |
392 | int sc; | |
393 | bool special = 0, toolong; | |
394 | ||
395 | np = name, *np++ = '$'; | |
396 | c = sc = getC(DOEXCL); | |
397 | if (any("\t \n", c)) { | |
398 | ungetD(c); | |
399 | ungetC('$' | QUOTE); | |
400 | return; | |
401 | } | |
402 | if (c == '{') | |
403 | *np++ = c, c = getC(DOEXCL); | |
404 | if (c == '#' || c == '?') | |
405 | special++, *np++ = c, c = getC(DOEXCL); | |
406 | *np++ = c; | |
407 | switch (c) { | |
408 | ||
409 | case '<': | |
410 | case '$': | |
411 | if (special) | |
412 | seterror(ERR_SPDOLLT); | |
413 | *np = 0; | |
414 | addla(name); | |
415 | return; | |
3802e2ef | 416 | |
6e37afca KB |
417 | case '\n': |
418 | ungetD(c); | |
419 | np--; | |
420 | seterror(ERR_NEWLINE); | |
421 | *np = 0; | |
422 | addla(name); | |
423 | return; | |
3802e2ef | 424 | |
6e37afca KB |
425 | case '*': |
426 | if (special) | |
427 | seterror(ERR_SPSTAR); | |
428 | *np = 0; | |
429 | addla(name); | |
430 | return; | |
3802e2ef | 431 | |
6e37afca KB |
432 | default: |
433 | toolong = 0; | |
434 | if (Isdigit(c)) { | |
435 | #ifdef notdef | |
436 | /* let $?0 pass for now */ | |
437 | if (special) { | |
438 | seterror(ERR_DIGIT); | |
439 | *np = 0; | |
440 | addla(name); | |
441 | return; | |
442 | } | |
443 | #endif | |
444 | /* we know that np < &name[4] */ | |
445 | ep = &np[MAXVARLEN]; | |
446 | while (c = getC(DOEXCL)) { | |
447 | if (!Isdigit(c)) | |
448 | break; | |
449 | if (np < ep) | |
450 | *np++ = c; | |
3802e2ef | 451 | else |
6e37afca KB |
452 | toolong = 1; |
453 | } | |
3802e2ef | 454 | } |
6e37afca KB |
455 | else if (letter(c)) { |
456 | /* we know that np < &name[4] */ | |
457 | ep = &np[MAXVARLEN]; | |
458 | toolong = 0; | |
459 | while (c = getC(DOEXCL)) { | |
460 | /* Bugfix for ${v123x} from Chris Torek, DAS DEC-90. */ | |
461 | if (!letter(c) && !Isdigit(c)) | |
462 | break; | |
463 | if (np < ep) | |
464 | *np++ = c; | |
465 | else | |
466 | toolong = 1; | |
467 | } | |
3802e2ef | 468 | } |
6e37afca KB |
469 | else { |
470 | *np = 0; | |
471 | seterror(ERR_VARILL); | |
472 | addla(name); | |
473 | return; | |
474 | } | |
475 | if (toolong) { | |
476 | seterror(ERR_VARTOOLONG); | |
477 | *np = 0; | |
478 | addla(name); | |
479 | return; | |
480 | } | |
481 | break; | |
482 | } | |
483 | if (c == '[') { | |
484 | *np++ = c; | |
485 | /* | |
486 | * Name up to here is a max of MAXVARLEN + 8. | |
487 | */ | |
488 | ep = &np[2 * MAXVARLEN + 8]; | |
489 | do { | |
490 | /* | |
491 | * Michael Greim: Allow $ expansion to take place in selector | |
492 | * expressions. (limits the number of characters returned) | |
493 | */ | |
494 | c = getC(DOEXCL | DODOL); | |
495 | if (c == '\n') { | |
3802e2ef | 496 | ungetD(c); |
6e37afca KB |
497 | np--; |
498 | seterror(ERR_NLINDEX); | |
499 | *np = 0; | |
500 | addla(name); | |
501 | return; | |
502 | } | |
503 | if (np < ep) | |
3802e2ef | 504 | *np++ = c; |
6e37afca KB |
505 | } while (c != ']'); |
506 | *np = '\0'; | |
507 | if (np >= ep) { | |
508 | seterror(ERR_SELOVFL); | |
509 | addla(name); | |
510 | return; | |
3802e2ef | 511 | } |
6e37afca KB |
512 | c = getC(DOEXCL); |
513 | } | |
514 | /* | |
515 | * Name up to here is a max of 2 * MAXVARLEN + 8. | |
516 | */ | |
517 | if (c == ':') { | |
518 | /* | |
519 | * if the :g modifier is followed by a newline, then error right away! | |
520 | * -strike | |
521 | */ | |
522 | ||
523 | int gmodflag = 0; | |
3802e2ef | 524 | |
6e37afca KB |
525 | *np++ = c, c = getC(DOEXCL); |
526 | if (c == 'g') | |
527 | gmodflag++, *np++ = c, c = getC(DOEXCL); | |
528 | *np++ = c; | |
529 | if (!any("htrqxe", c)) { | |
530 | if (gmodflag && c == '\n') | |
531 | stderror(ERR_VARSYN); /* strike */ | |
532 | seterror(ERR_VARMOD, c); | |
533 | *np = 0; | |
534 | addla(name); | |
535 | return; | |
536 | } | |
537 | } | |
538 | else | |
539 | ungetD(c); | |
540 | if (sc == '{') { | |
541 | c = getC(DOEXCL); | |
542 | if (c != '}') { | |
543 | ungetD(c); | |
544 | seterror(ERR_MISSING, '}'); | |
545 | *np = 0; | |
546 | addla(name); | |
547 | return; | |
548 | } | |
549 | *np++ = c; | |
550 | } | |
551 | *np = 0; | |
552 | addla(name); | |
553 | return; | |
3802e2ef BJ |
554 | } |
555 | ||
6e37afca | 556 | void |
3802e2ef | 557 | addla(cp) |
6e37afca | 558 | Char *cp; |
3802e2ef | 559 | { |
6e37afca | 560 | Char buf[BUFSIZ]; |
3802e2ef | 561 | |
6e37afca KB |
562 | if (Strlen(cp) + (lap ? Strlen(lap) : 0) >= |
563 | (sizeof(labuf) - 4) / sizeof(Char)) { | |
564 | seterror(ERR_EXPOVFL); | |
565 | return; | |
566 | } | |
567 | if (lap) | |
568 | (void) Strcpy(buf, lap); | |
569 | (void) Strcpy(labuf, cp); | |
570 | if (lap) | |
571 | (void) Strcat(labuf, buf); | |
572 | lap = labuf; | |
3802e2ef BJ |
573 | } |
574 | ||
6e37afca KB |
575 | static Char lhsb[32]; |
576 | static Char slhs[32]; | |
577 | static Char rhsb[64]; | |
578 | static int quesarg; | |
3802e2ef | 579 | |
6e37afca | 580 | static void |
3802e2ef | 581 | getexcl(sc) |
0aec749d | 582 | int sc; |
3802e2ef | 583 | { |
6e37afca KB |
584 | register struct wordent *hp, *ip; |
585 | int left, right, dol; | |
586 | register int c; | |
587 | ||
588 | if (sc == 0) { | |
589 | sc = getC(0); | |
590 | if (sc != '{') { | |
591 | ungetC(sc); | |
592 | sc = 0; | |
3802e2ef | 593 | } |
6e37afca KB |
594 | } |
595 | quesarg = -1; | |
596 | lastev = eventno; | |
597 | hp = gethent(sc); | |
598 | if (hp == 0) | |
599 | return; | |
600 | hadhist = 1; | |
601 | dol = 0; | |
602 | if (hp == alhistp) | |
603 | for (ip = hp->next->next; ip != alhistt; ip = ip->next) | |
604 | dol++; | |
605 | else | |
606 | for (ip = hp->next->next; ip != hp->prev; ip = ip->next) | |
607 | dol++; | |
608 | left = 0, right = dol; | |
609 | if (sc == HISTSUB) { | |
610 | ungetC('s'), unreadc(HISTSUB), c = ':'; | |
611 | goto subst; | |
612 | } | |
613 | c = getC(0); | |
614 | if (!any(":^$*-%", c)) | |
615 | goto subst; | |
616 | left = right = -1; | |
617 | if (c == ':') { | |
3802e2ef | 618 | c = getC(0); |
6e37afca KB |
619 | unreadc(c); |
620 | if (letter(c) || c == '&') { | |
621 | c = ':'; | |
622 | left = 0, right = dol; | |
623 | goto subst; | |
624 | } | |
625 | } | |
626 | else | |
627 | ungetC(c); | |
628 | if (!getsel(&left, &right, dol)) | |
629 | return; | |
630 | c = getC(0); | |
631 | if (c == '*') | |
632 | ungetC(c), c = '-'; | |
633 | if (c == '-') { | |
3802e2ef | 634 | if (!getsel(&left, &right, dol)) |
6e37afca | 635 | return; |
3802e2ef | 636 | c = getC(0); |
6e37afca | 637 | } |
3802e2ef | 638 | subst: |
6e37afca KB |
639 | exclc = right - left + 1; |
640 | while (--left >= 0) | |
641 | hp = hp->next; | |
642 | if (sc == HISTSUB || c == ':') { | |
643 | do { | |
644 | hp = getsub(hp); | |
645 | c = getC(0); | |
646 | } while (c == ':'); | |
647 | } | |
648 | unreadc(c); | |
649 | if (sc == '{') { | |
650 | c = getC(0); | |
651 | if (c != '}') | |
652 | seterror(ERR_BADBANG); | |
653 | } | |
654 | exclnxt = hp; | |
3802e2ef BJ |
655 | } |
656 | ||
6e37afca | 657 | static struct wordent * |
3802e2ef | 658 | getsub(en) |
6e37afca | 659 | struct wordent *en; |
3802e2ef | 660 | { |
6e37afca KB |
661 | register Char *cp; |
662 | int delim; | |
663 | register int c; | |
664 | int sc; | |
665 | bool global = 0; | |
666 | Char orhsb[sizeof(rhsb) / sizeof(Char)]; | |
667 | ||
668 | exclnxt = 0; | |
669 | sc = c = getC(0); | |
670 | if (c == 'g') | |
671 | global ++, sc = c = getC(0); | |
672 | ||
673 | switch (c) { | |
674 | case 'p': | |
675 | justpr++; | |
676 | return (en); | |
3802e2ef | 677 | |
6e37afca KB |
678 | case 'x': |
679 | case 'q': | |
680 | global ++; | |
3802e2ef | 681 | |
6e37afca | 682 | /* fall into ... */ |
3802e2ef | 683 | |
6e37afca KB |
684 | case 'h': |
685 | case 'r': | |
686 | case 't': | |
687 | case 'e': | |
688 | break; | |
3802e2ef | 689 | |
6e37afca KB |
690 | case '&': |
691 | if (slhs[0] == 0) { | |
692 | seterror(ERR_NOSUBST); | |
693 | return (en); | |
694 | } | |
695 | (void) Strcpy(lhsb, slhs); | |
696 | break; | |
697 | ||
698 | #ifdef notdef | |
699 | case '~': | |
700 | if (lhsb[0] == 0) | |
701 | goto badlhs; | |
702 | break; | |
703 | #endif | |
3802e2ef | 704 | |
6e37afca KB |
705 | case 's': |
706 | delim = getC(0); | |
707 | if (letter(delim) || Isdigit(delim) || any(" \t\n", delim)) { | |
708 | unreadc(delim); | |
709 | lhsb[0] = 0; | |
710 | seterror(ERR_BADSUBST); | |
711 | return (en); | |
712 | } | |
713 | cp = lhsb; | |
714 | for (;;) { | |
715 | c = getC(0); | |
716 | if (c == '\n') { | |
717 | unreadc(c); | |
3802e2ef | 718 | break; |
6e37afca KB |
719 | } |
720 | if (c == delim) | |
3802e2ef | 721 | break; |
6e37afca KB |
722 | if (cp > &lhsb[sizeof(lhsb) / sizeof(Char) - 2]) { |
723 | lhsb[0] = 0; | |
724 | seterror(ERR_BADSUBST); | |
725 | return (en); | |
726 | } | |
727 | if (c == '\\') { | |
728 | c = getC(0); | |
729 | if (c != delim && c != '\\') | |
730 | *cp++ = '\\'; | |
731 | } | |
732 | *cp++ = c; | |
3802e2ef | 733 | } |
6e37afca KB |
734 | if (cp != lhsb) |
735 | *cp++ = 0; | |
736 | else if (lhsb[0] == 0) { | |
737 | seterror(ERR_LHS); | |
738 | return (en); | |
739 | } | |
740 | cp = rhsb; | |
741 | (void) Strcpy(orhsb, cp); | |
742 | for (;;) { | |
743 | c = getC(0); | |
744 | if (c == '\n') { | |
745 | unreadc(c); | |
746 | break; | |
747 | } | |
748 | if (c == delim) | |
749 | break; | |
750 | #ifdef notdef | |
751 | if (c == '~') { | |
752 | if (&cp[Strlen(orhsb)] > &rhsb[sizeof(rhsb) / sizeof(Char) - 2]) | |
753 | goto toorhs; | |
754 | (void) Strcpy(cp, orhsb); | |
755 | cp = Strend(cp); | |
756 | continue; | |
757 | } | |
758 | #endif | |
759 | if (cp > &rhsb[sizeof(rhsb) / sizeof(Char) - 2]) { | |
760 | seterror(ERR_RHSLONG); | |
761 | return (en); | |
762 | } | |
763 | if (c == '\\') { | |
764 | c = getC(0); | |
765 | if (c != delim /* && c != '~' */ ) | |
766 | *cp++ = '\\'; | |
767 | } | |
768 | *cp++ = c; | |
769 | } | |
770 | *cp++ = 0; | |
771 | break; | |
772 | ||
773 | default: | |
774 | if (c == '\n') | |
775 | unreadc(c); | |
776 | seterror(ERR_BADBANGMOD, c); | |
3802e2ef | 777 | return (en); |
6e37afca KB |
778 | } |
779 | (void) Strcpy(slhs, lhsb); | |
780 | if (exclc) | |
781 | en = dosub(sc, en, global); | |
782 | return (en); | |
3802e2ef BJ |
783 | } |
784 | ||
6e37afca | 785 | static struct wordent * |
3802e2ef | 786 | dosub(sc, en, global) |
6e37afca KB |
787 | int sc; |
788 | struct wordent *en; | |
789 | bool global; | |
3802e2ef | 790 | { |
6e37afca KB |
791 | struct wordent lexi; |
792 | bool didsub = 0; | |
793 | struct wordent *hp = &lexi; | |
794 | register struct wordent *wdp; | |
795 | register int i = exclc; | |
796 | ||
797 | wdp = hp; | |
798 | while (--i >= 0) { | |
799 | register struct wordent *new; | |
800 | ||
801 | new = (struct wordent *) xcalloc(1, sizeof *wdp); | |
802 | new->word = 0; | |
803 | new->prev = wdp; | |
804 | new->next = hp; | |
805 | wdp->next = new; | |
806 | wdp = new; | |
807 | en = en->next; | |
808 | wdp->word = (en->word && (global ||didsub == 0)) ? | |
809 | subword(en->word, sc, &didsub) : Strsave(en->word); | |
810 | } | |
811 | if (didsub == 0) | |
812 | seterror(ERR_MODFAIL); | |
813 | hp->prev = wdp; | |
814 | return (&enthist(-1000, &lexi, 0)->Hlex); | |
3802e2ef BJ |
815 | } |
816 | ||
6e37afca | 817 | static Char * |
3802e2ef | 818 | subword(cp, type, adid) |
6e37afca KB |
819 | Char *cp; |
820 | int type; | |
821 | bool *adid; | |
3802e2ef | 822 | { |
6e37afca KB |
823 | Char wbuf[BUFSIZ]; |
824 | register Char *wp, *mp, *np; | |
825 | register int i; | |
826 | ||
827 | switch (type) { | |
828 | ||
829 | case 'r': | |
830 | case 'e': | |
831 | case 'h': | |
832 | case 't': | |
833 | case 'q': | |
834 | case 'x': | |
835 | wp = domod(cp, type); | |
836 | if (wp == 0) | |
837 | return (Strsave(cp)); | |
838 | *adid = 1; | |
839 | return (wp); | |
840 | ||
841 | default: | |
842 | wp = wbuf; | |
843 | i = BUFSIZ - 4; | |
844 | for (mp = cp; *mp; mp++) | |
845 | if (matchs(mp, lhsb)) { | |
846 | for (np = cp; np < mp;) | |
847 | *wp++ = *np++, --i; | |
848 | for (np = rhsb; *np; np++) | |
849 | switch (*np) { | |
850 | ||
851 | case '\\': | |
852 | if (np[1] == '&') | |
853 | np++; | |
854 | /* fall into ... */ | |
3802e2ef | 855 | |
6e37afca KB |
856 | default: |
857 | if (--i < 0) { | |
858 | seterror(ERR_SUBOVFL); | |
859 | return (STRNULL); | |
3802e2ef | 860 | } |
6e37afca KB |
861 | *wp++ = *np; |
862 | continue; | |
863 | ||
864 | case '&': | |
865 | i -= Strlen(lhsb); | |
866 | if (i < 0) { | |
867 | seterror(ERR_SUBOVFL); | |
868 | return (STRNULL); | |
869 | } | |
870 | *wp = 0; | |
871 | (void) Strcat(wp, lhsb); | |
872 | wp = Strend(wp); | |
873 | continue; | |
874 | } | |
875 | mp += Strlen(lhsb); | |
876 | i -= Strlen(mp); | |
877 | if (i < 0) { | |
878 | seterror(ERR_SUBOVFL); | |
879 | return (STRNULL); | |
880 | } | |
881 | *wp = 0; | |
882 | (void) Strcat(wp, mp); | |
883 | *adid = 1; | |
884 | return (Strsave(wbuf)); | |
885 | } | |
886 | return (Strsave(cp)); | |
887 | } | |
3802e2ef BJ |
888 | } |
889 | ||
6e37afca | 890 | Char * |
3802e2ef | 891 | domod(cp, type) |
6e37afca KB |
892 | Char *cp; |
893 | int type; | |
3802e2ef | 894 | { |
6e37afca KB |
895 | register Char *wp, *xp; |
896 | register int c; | |
897 | ||
898 | switch (type) { | |
899 | ||
900 | case 'x': | |
901 | case 'q': | |
902 | wp = Strsave(cp); | |
903 | for (xp = wp; c = *xp; xp++) | |
904 | if ((c != ' ' && c != '\t') || type == 'q') | |
905 | *xp |= QUOTE; | |
906 | return (wp); | |
907 | ||
908 | case 'h': | |
909 | case 't': | |
910 | if (!any(short2str(cp), '/')) | |
911 | return (type == 't' ? Strsave(cp) : 0); | |
912 | wp = Strend(cp); | |
913 | while (*--wp != '/') | |
914 | continue; | |
915 | if (type == 'h') | |
916 | xp = Strsave(cp), xp[wp - cp] = 0; | |
917 | else | |
918 | xp = Strsave(wp + 1); | |
919 | return (xp); | |
920 | ||
921 | case 'e': | |
922 | case 'r': | |
923 | wp = Strend(cp); | |
924 | for (wp--; wp >= cp && *wp != '/'; wp--) | |
925 | if (*wp == '.') { | |
926 | if (type == 'e') | |
927 | xp = Strsave(wp + 1); | |
3802e2ef | 928 | else |
6e37afca | 929 | xp = Strsave(cp), xp[wp - cp] = 0; |
3802e2ef | 930 | return (xp); |
6e37afca KB |
931 | } |
932 | return (Strsave(type == 'e' ? STRNULL : cp)); | |
933 | } | |
934 | return (0); | |
3802e2ef BJ |
935 | } |
936 | ||
6e37afca | 937 | static int |
3802e2ef | 938 | matchs(str, pat) |
6e37afca | 939 | register Char *str, *pat; |
3802e2ef | 940 | { |
6e37afca KB |
941 | while (*str && *pat && *str == *pat) |
942 | str++, pat++; | |
943 | return (*pat == 0); | |
3802e2ef BJ |
944 | } |
945 | ||
6e37afca | 946 | static int |
3802e2ef | 947 | getsel(al, ar, dol) |
6e37afca KB |
948 | register int *al, *ar; |
949 | int dol; | |
3802e2ef | 950 | { |
6e37afca KB |
951 | register int c = getC(0); |
952 | register int i; | |
953 | bool first = *al < 0; | |
3802e2ef | 954 | |
6e37afca | 955 | switch (c) { |
3802e2ef | 956 | |
6e37afca KB |
957 | case '%': |
958 | if (quesarg == -1) { | |
959 | seterror(ERR_BADBANGARG); | |
960 | return (0); | |
961 | } | |
962 | if (*al < 0) | |
963 | *al = quesarg; | |
964 | *ar = quesarg; | |
965 | break; | |
966 | ||
967 | case '-': | |
968 | if (*al < 0) { | |
969 | *al = 0; | |
970 | *ar = dol - 1; | |
971 | unreadc(c); | |
972 | } | |
973 | return (1); | |
3802e2ef | 974 | |
6e37afca KB |
975 | case '^': |
976 | if (*al < 0) | |
977 | *al = 1; | |
978 | *ar = 1; | |
979 | break; | |
980 | ||
981 | case '$': | |
982 | if (*al < 0) | |
983 | *al = dol; | |
984 | *ar = dol; | |
985 | break; | |
986 | ||
987 | case '*': | |
988 | if (*al < 0) | |
989 | *al = 1; | |
990 | *ar = dol; | |
991 | if (*ar < *al) { | |
992 | *ar = 0; | |
993 | *al = 1; | |
994 | return (1); | |
3802e2ef | 995 | } |
6e37afca KB |
996 | break; |
997 | ||
998 | default: | |
999 | if (Isdigit(c)) { | |
1000 | i = 0; | |
1001 | while (Isdigit(c)) { | |
1002 | i = i * 10 + c - '0'; | |
3802e2ef | 1003 | c = getC(0); |
6e37afca KB |
1004 | } |
1005 | if (i < 0) | |
1006 | i = dol + 1; | |
1007 | if (*al < 0) | |
1008 | *al = i; | |
1009 | *ar = i; | |
3802e2ef | 1010 | } |
6e37afca KB |
1011 | else if (*al < 0) |
1012 | *al = 0, *ar = dol; | |
1013 | else | |
1014 | *ar = dol - 1; | |
1015 | unreadc(c); | |
1016 | break; | |
1017 | } | |
1018 | if (first) { | |
1019 | c = getC(0); | |
1020 | unreadc(c); | |
1021 | if (any("-$*", c)) | |
1022 | return (1); | |
1023 | } | |
1024 | if (*al > *ar || *ar > dol) { | |
1025 | seterror(ERR_BADBANGARG); | |
1026 | return (0); | |
1027 | } | |
1028 | return (1); | |
3802e2ef BJ |
1029 | |
1030 | } | |
1031 | ||
6e37afca | 1032 | static struct wordent * |
3802e2ef | 1033 | gethent(sc) |
6e37afca | 1034 | int sc; |
3802e2ef | 1035 | { |
6e37afca KB |
1036 | register struct Hist *hp; |
1037 | register Char *np; | |
1038 | register int c; | |
1039 | int event; | |
1040 | bool back = 0; | |
1041 | ||
1042 | c = sc == HISTSUB ? HIST : getC(0); | |
1043 | if (c == HIST) { | |
1044 | if (alhistp) | |
1045 | return (alhistp); | |
1046 | event = eventno; | |
1047 | } | |
1048 | else | |
3802e2ef BJ |
1049 | switch (c) { |
1050 | ||
1051 | case ':': | |
1052 | case '^': | |
1053 | case '$': | |
1054 | case '*': | |
1055 | case '%': | |
6e37afca KB |
1056 | ungetC(c); |
1057 | if (lastev == eventno && alhistp) | |
1058 | return (alhistp); | |
1059 | event = lastev; | |
1060 | break; | |
1061 | ||
1062 | case '#': /* !# is command being typed in (mrh) */ | |
1063 | if (--hleft == 0) { | |
1064 | seterror(ERR_HISTLOOP); | |
1065 | return (0); | |
1066 | } | |
1067 | else | |
1068 | return (¶ml); | |
1069 | /* NOTREACHED */ | |
3802e2ef BJ |
1070 | |
1071 | case '-': | |
6e37afca KB |
1072 | back = 1; |
1073 | c = getC(0); | |
1074 | /* FALLSTHROUGH */ | |
3802e2ef BJ |
1075 | |
1076 | default: | |
6e37afca | 1077 | if (any("(=~", c)) { |
3802e2ef | 1078 | unreadc(c); |
6e37afca KB |
1079 | ungetC(HIST); |
1080 | return (0); | |
1081 | } | |
1082 | np = lhsb; | |
1083 | event = 0; | |
1084 | while (!any(": \t\\\n}", c)) { | |
1085 | if (event != -1 && Isdigit(c)) | |
1086 | event = event * 10 + c - '0'; | |
1087 | else | |
1088 | event = -1; | |
1089 | if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2]) | |
1090 | *np++ = c; | |
1091 | c = getC(0); | |
1092 | } | |
1093 | unreadc(c); | |
1094 | if (np == lhsb) { | |
1095 | ungetC(HIST); | |
1096 | return (0); | |
1097 | } | |
1098 | *np++ = 0; | |
1099 | if (event != -1) { | |
1100 | /* | |
1101 | * History had only digits | |
1102 | */ | |
1103 | if (back) | |
1104 | event = eventno + (alhistp == 0) - (event ? event : 0); | |
1105 | break; | |
1106 | } | |
1107 | hp = findev(lhsb, 0); | |
1108 | if (hp) | |
1109 | lastev = hp->Hnum; | |
1110 | return (&hp->Hlex); | |
3802e2ef BJ |
1111 | |
1112 | case '?': | |
6e37afca KB |
1113 | np = lhsb; |
1114 | for (;;) { | |
1115 | c = getC(0); | |
1116 | if (c == '\n') { | |
1117 | unreadc(c); | |
1118 | break; | |
3802e2ef | 1119 | } |
6e37afca KB |
1120 | if (c == '?') |
1121 | break; | |
1122 | if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2]) | |
1123 | *np++ = c; | |
1124 | } | |
1125 | if (np == lhsb) { | |
1126 | if (lhsb[0] == 0) { | |
1127 | seterror(ERR_NOSEARCH); | |
1128 | return (0); | |
3802e2ef | 1129 | } |
6e37afca KB |
1130 | } |
1131 | else | |
1132 | *np++ = 0; | |
1133 | hp = findev(lhsb, 1); | |
1134 | if (hp) | |
1135 | lastev = hp->Hnum; | |
1136 | return (&hp->Hlex); | |
3802e2ef | 1137 | } |
6e37afca KB |
1138 | |
1139 | for (hp = Histlist.Hnext; hp; hp = hp->Hnext) | |
1140 | if (hp->Hnum == event) { | |
1141 | hp->Href = eventno; | |
1142 | lastev = hp->Hnum; | |
1143 | return (&hp->Hlex); | |
1144 | } | |
1145 | np = putn(event); | |
1146 | seterror(ERR_NOEVENT, short2str(np)); | |
1147 | return (0); | |
3802e2ef BJ |
1148 | } |
1149 | ||
6e37afca | 1150 | static struct Hist * |
3802e2ef | 1151 | findev(cp, anyarg) |
6e37afca KB |
1152 | Char *cp; |
1153 | bool anyarg; | |
3802e2ef | 1154 | { |
6e37afca | 1155 | register struct Hist *hp; |
3802e2ef | 1156 | |
6e37afca KB |
1157 | for (hp = Histlist.Hnext; hp; hp = hp->Hnext) { |
1158 | Char *dp; | |
1159 | register Char *p, *q; | |
1160 | register struct wordent *lp = hp->Hlex.next; | |
1161 | int argno = 0; | |
35371dec | 1162 | |
6e37afca KB |
1163 | /* |
1164 | * The entries added by alias substitution don't have a newline but do | |
1165 | * have a negative event number. Savehist() trims off these entries, | |
1166 | * but it happens before alias expansion, too early to delete those | |
1167 | * from the previous command. | |
1168 | */ | |
1169 | if (hp->Hnum < 0) | |
1170 | continue; | |
1171 | if (lp->word[0] == '\n') | |
1172 | continue; | |
1173 | if (!anyarg) { | |
1174 | p = cp; | |
1175 | q = lp->word; | |
1176 | do | |
1177 | if (!*p) | |
1178 | return (hp); | |
1179 | while (*p++ == *q++); | |
1180 | continue; | |
35371dec | 1181 | } |
6e37afca KB |
1182 | do { |
1183 | for (dp = lp->word; *dp; dp++) { | |
1184 | p = cp; | |
1185 | q = dp; | |
1186 | do | |
1187 | if (!*p) { | |
1188 | quesarg = argno; | |
1189 | return (hp); | |
1190 | } | |
1191 | while (*p++ == *q++); | |
1192 | } | |
1193 | lp = lp->next; | |
1194 | argno++; | |
1195 | } while (lp->word[0] != '\n'); | |
1196 | } | |
1197 | seterror(ERR_NOEVENT, short2str(cp)); | |
1198 | return (0); | |
3802e2ef BJ |
1199 | } |
1200 | ||
3802e2ef | 1201 | |
6e37afca | 1202 | static void |
3802e2ef | 1203 | setexclp(cp) |
6e37afca | 1204 | register Char *cp; |
3802e2ef | 1205 | { |
6e37afca KB |
1206 | if (cp && cp[0] == '\n') |
1207 | return; | |
1208 | exclp = cp; | |
3802e2ef BJ |
1209 | } |
1210 | ||
6e37afca | 1211 | void |
3802e2ef | 1212 | unreadc(c) |
4d7b2685 | 1213 | int c; |
3802e2ef | 1214 | { |
6e37afca | 1215 | peekread = c; |
3802e2ef BJ |
1216 | } |
1217 | ||
6e37afca | 1218 | int |
3802e2ef | 1219 | readc(wanteof) |
6e37afca | 1220 | bool wanteof; |
3802e2ef | 1221 | { |
6e37afca KB |
1222 | register int c; |
1223 | static sincereal; | |
3802e2ef | 1224 | |
6e37afca KB |
1225 | if (c = peekread) { |
1226 | peekread = 0; | |
1227 | return (c); | |
1228 | } | |
3802e2ef | 1229 | top: |
6e37afca KB |
1230 | if (alvecp) { |
1231 | if (c = *alvecp++) | |
1232 | return (c); | |
1233 | if (*alvec) { | |
1234 | alvecp = *alvec++; | |
1235 | return (' '); | |
3802e2ef | 1236 | } |
6e37afca KB |
1237 | } |
1238 | if (alvec) { | |
1239 | if (alvecp = *alvec) { | |
1240 | alvec++; | |
1241 | goto top; | |
3802e2ef | 1242 | } |
6e37afca KB |
1243 | /* Infinite source! */ |
1244 | return ('\n'); | |
1245 | } | |
1246 | if (evalp) { | |
1247 | if (c = *evalp++) | |
1248 | return (c); | |
1249 | if (*evalvec) { | |
1250 | evalp = *evalvec++; | |
1251 | return (' '); | |
3802e2ef | 1252 | } |
6e37afca KB |
1253 | evalp = 0; |
1254 | } | |
1255 | if (evalvec) { | |
1256 | if (evalvec == (Char **) 1) { | |
1257 | doneinp = 1; | |
1258 | reset(); | |
1259 | } | |
1260 | if (evalp = *evalvec) { | |
1261 | evalvec++; | |
1262 | goto top; | |
1263 | } | |
1264 | evalvec = (Char **) 1; | |
1265 | return ('\n'); | |
1266 | } | |
1267 | do { | |
1268 | if (arginp == (Char *) 1 || onelflg == 1) { | |
1269 | if (wanteof) | |
1270 | return (-1); | |
1271 | exitstat(); | |
1272 | } | |
1273 | if (arginp) { | |
1274 | if ((c = *arginp++) == 0) { | |
1275 | arginp = (Char *) 1; | |
3802e2ef | 1276 | return ('\n'); |
6e37afca KB |
1277 | } |
1278 | return (c); | |
3802e2ef | 1279 | } |
3802e2ef | 1280 | reread: |
6e37afca KB |
1281 | c = bgetc(); |
1282 | if (c < 0) { | |
6e37afca | 1283 | struct termios tty; |
6e37afca KB |
1284 | if (wanteof) |
1285 | return (-1); | |
1286 | /* was isatty but raw with ignoreeof yields problems */ | |
6e37afca | 1287 | if (tcgetattr(SHIN, &tty) == 0 && (tty.c_lflag & ICANON)) |
6e37afca KB |
1288 | { |
1289 | /* was 'short' for FILEC */ | |
1290 | int ctpgrp; | |
1291 | ||
1292 | if (++sincereal > 25) | |
1293 | goto oops; | |
1294 | if (tpgrp != -1 && | |
1295 | (ctpgrp = tcgetpgrp(FSHTTY)) != -1 && | |
1296 | tpgrp != ctpgrp) { | |
1297 | (void) tcsetpgrp(FSHTTY, tpgrp); | |
1298 | (void) killpg((pid_t) ctpgrp, SIGHUP); | |
454c2aa3 CZ |
1299 | (void) fprintf(csherr, "Reset tty pgrp from %d to %d\n", |
1300 | ctpgrp, tpgrp); | |
6e37afca | 1301 | goto reread; |
3802e2ef | 1302 | } |
6e37afca KB |
1303 | if (adrof(STRignoreeof)) { |
1304 | if (loginsh) | |
454c2aa3 | 1305 | (void) fprintf(csherr,"\nUse \"logout\" to logout.\n"); |
6e37afca | 1306 | else |
454c2aa3 | 1307 | (void) fprintf(csherr,"\nUse \"exit\" to leave csh.\n"); |
6e37afca KB |
1308 | reset(); |
1309 | } | |
1310 | if (chkstop == 0) | |
1311 | panystop(1); | |
1312 | } | |
1313 | oops: | |
1314 | doneinp = 1; | |
1315 | reset(); | |
1316 | } | |
1317 | sincereal = 0; | |
1318 | if (c == '\n' && onelflg) | |
1319 | onelflg--; | |
1320 | } while (c == 0); | |
1321 | return (c); | |
3802e2ef BJ |
1322 | } |
1323 | ||
6e37afca | 1324 | static int |
3802e2ef BJ |
1325 | bgetc() |
1326 | { | |
6e37afca KB |
1327 | register int buf, off, c; |
1328 | ||
fff1d7ed | 1329 | #ifdef FILEC |
6e37afca KB |
1330 | register int numleft = 0, roomleft; |
1331 | Char ttyline[BUFSIZ]; | |
5b182e7a | 1332 | #endif |
6e37afca | 1333 | char tbuf[BUFSIZ + 1]; |
3802e2ef | 1334 | |
6e37afca KB |
1335 | if (cantell) { |
1336 | if (fseekp < fbobp || fseekp > feobp) { | |
1337 | fbobp = feobp = fseekp; | |
1338 | (void) lseek(SHIN, fseekp, L_SET); | |
1339 | } | |
1340 | if (fseekp == feobp) { | |
1341 | int i; | |
1342 | ||
1343 | fbobp = feobp; | |
1344 | do | |
1345 | c = read(SHIN, tbuf, BUFSIZ); | |
1346 | while (c < 0 && errno == EINTR); | |
1347 | if (c <= 0) | |
1348 | return (-1); | |
1349 | for (i = 0; i < c; i++) | |
1350 | fbuf[0][i] = (unsigned char) tbuf[i]; | |
1351 | feobp += c; | |
3802e2ef | 1352 | } |
6e37afca KB |
1353 | c = fbuf[0][fseekp - fbobp]; |
1354 | fseekp++; | |
1355 | return (c); | |
1356 | } | |
6e37afca | 1357 | |
3802e2ef | 1358 | again: |
6e37afca KB |
1359 | buf = (int) fseekp / BUFSIZ; |
1360 | if (buf >= fblocks) { | |
1361 | register Char **nfbuf = | |
1362 | (Char **) xcalloc((size_t) (fblocks + 2), | |
1363 | sizeof(Char **)); | |
1364 | ||
1365 | if (fbuf) { | |
1366 | (void) blkcpy(nfbuf, fbuf); | |
1367 | xfree((ptr_t) fbuf); | |
3802e2ef | 1368 | } |
6e37afca KB |
1369 | fbuf = nfbuf; |
1370 | fbuf[fblocks] = (Char *) xcalloc(BUFSIZ, sizeof(Char)); | |
1371 | fblocks++; | |
1372 | if (!intty) | |
1373 | goto again; | |
1374 | } | |
1375 | if (fseekp >= feobp) { | |
1376 | buf = (int) feobp / BUFSIZ; | |
1377 | off = (int) feobp % BUFSIZ; | |
1378 | roomleft = BUFSIZ - off; | |
1379 | ||
1380 | #ifdef FILEC | |
1381 | roomleft = BUFSIZ - off; | |
1382 | for (;;) { | |
1383 | if (filec && intty) { | |
1384 | c = numleft ? numleft : tenex(ttyline, BUFSIZ); | |
1385 | if (c > roomleft) { | |
1386 | /* start with fresh buffer */ | |
1387 | feobp = fseekp = fblocks * BUFSIZ; | |
1388 | numleft = c; | |
1389 | goto again; | |
1390 | } | |
1391 | if (c > 0) | |
1392 | bcopy(ttyline, fbuf[buf] + off, c * sizeof(Char)); | |
1393 | numleft = 0; | |
1394 | } | |
1395 | else { | |
5b182e7a | 1396 | #endif |
6e37afca KB |
1397 | c = read(SHIN, tbuf, roomleft); |
1398 | if (c > 0) { | |
1399 | int i; | |
1400 | Char *ptr = fbuf[buf] + off; | |
1401 | ||
1402 | for (i = 0; i < c; i++) | |
1403 | ptr[i] = (unsigned char) tbuf[i]; | |
0a2abf9e | 1404 | } |
6e37afca KB |
1405 | #ifdef FILEC |
1406 | } | |
1407 | #endif | |
1408 | if (c >= 0) | |
1409 | break; | |
1410 | if (errno == EWOULDBLOCK) { | |
1411 | int off = 0; | |
1412 | ||
1413 | (void) ioctl(SHIN, FIONBIO, (ioctl_t) & off); | |
1414 | } | |
1415 | else if (errno != EINTR) | |
1416 | break; | |
1417 | } | |
1418 | if (c <= 0) | |
1419 | return (-1); | |
1420 | feobp += c; | |
fff1d7ed | 1421 | #ifndef FILEC |
6e37afca | 1422 | goto again; |
5b182e7a | 1423 | #else |
6e37afca KB |
1424 | if (filec && !intty) |
1425 | goto again; | |
5b182e7a | 1426 | #endif |
6e37afca KB |
1427 | } |
1428 | c = fbuf[buf][(int) fseekp % BUFSIZ]; | |
1429 | fseekp++; | |
1430 | return (c); | |
3802e2ef BJ |
1431 | } |
1432 | ||
6e37afca | 1433 | static void |
3802e2ef BJ |
1434 | bfree() |
1435 | { | |
6e37afca | 1436 | register int sb, i; |
3802e2ef | 1437 | |
6e37afca KB |
1438 | if (cantell) |
1439 | return; | |
6e37afca KB |
1440 | if (whyles) |
1441 | return; | |
1442 | sb = (int) (fseekp - 1) / BUFSIZ; | |
1443 | if (sb > 0) { | |
1444 | for (i = 0; i < sb; i++) | |
1445 | xfree((ptr_t) fbuf[i]); | |
1446 | (void) blkcpy(fbuf, &fbuf[sb]); | |
1447 | fseekp -= BUFSIZ * sb; | |
1448 | feobp -= BUFSIZ * sb; | |
1449 | fblocks -= sb; | |
1450 | } | |
3802e2ef BJ |
1451 | } |
1452 | ||
6e37afca | 1453 | void |
3802e2ef | 1454 | bseek(l) |
6e37afca KB |
1455 | off_t l; |
1456 | ||
3802e2ef | 1457 | { |
3802e2ef | 1458 | |
6e37afca | 1459 | fseekp = l; |
6e37afca | 1460 | if (!cantell) { |
171af061 CZ |
1461 | #ifdef notdef |
1462 | register struct whyle *wp; | |
6e37afca | 1463 | #endif |
171af061 | 1464 | |
6e37afca KB |
1465 | if (!whyles) |
1466 | return; | |
1467 | #ifdef notdef | |
1468 | /* | |
1469 | * Christos: I don't understand this? both wp and l are local. What is | |
1470 | * this used for? I suspect the author meant fseek = wp->w_start | |
171af061 | 1471 | * This seek/tell stuff needs to be re-written... |
6e37afca KB |
1472 | */ |
1473 | for (wp = whyles; wp->w_next; wp = wp->w_next) | |
1474 | continue; | |
1475 | if (wp->w_start > l) | |
1476 | l = wp->w_start; | |
3802e2ef | 1477 | #endif |
6e37afca | 1478 | } |
3802e2ef BJ |
1479 | } |
1480 | ||
6e37afca | 1481 | void |
3802e2ef BJ |
1482 | btoeof() |
1483 | { | |
6e37afca KB |
1484 | (void) lseek(SHIN, (off_t) 0, L_XTND); |
1485 | fseekp = feobp; | |
1486 | wfree(); | |
1487 | bfree(); | |
3802e2ef BJ |
1488 | } |
1489 | ||
6e37afca | 1490 | void |
3802e2ef BJ |
1491 | settell() |
1492 | { | |
6e37afca KB |
1493 | cantell = 0; |
1494 | if (arginp || onelflg || intty) | |
1495 | return; | |
1496 | if (lseek(SHIN, (off_t) 0, L_INCR) < 0 || errno == ESPIPE) | |
1497 | return; | |
1498 | fbuf = (Char **) xcalloc(2, sizeof(Char **)); | |
1499 | fblocks = 1; | |
1500 | fbuf[0] = (Char *) xcalloc(BUFSIZ, sizeof(Char)); | |
1501 | fseekp = fbobp = feobp = lseek(SHIN, (off_t) 0, L_INCR); | |
1502 | cantell = 1; | |
3802e2ef | 1503 | } |