Commit | Line | Data |
---|---|---|
d0aeaf5a 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 | ||
2ae9f53f | 7 | #ifndef lint |
b4817aab | 8 | static char *sccsid = "@(#)aux.c 5.4 (Berkeley) %G%"; |
d0aeaf5a | 9 | #endif not lint |
6447a23f KS |
10 | |
11 | #include "rcv.h" | |
12 | #include <sys/stat.h> | |
6447a23f KS |
13 | #include <ctype.h> |
14 | ||
15 | /* | |
16 | * Mail -- a mail program | |
17 | * | |
18 | * Auxiliary functions. | |
19 | */ | |
20 | ||
6447a23f KS |
21 | /* |
22 | * Return a pointer to a dynamic copy of the argument. | |
23 | */ | |
24 | ||
25 | char * | |
26 | savestr(str) | |
27 | char *str; | |
28 | { | |
29 | register char *cp, *cp2, *top; | |
30 | ||
31 | for (cp = str; *cp; cp++) | |
32 | ; | |
33 | top = salloc(cp-str + 1); | |
34 | if (top == NOSTR) | |
35 | return(NOSTR); | |
36 | for (cp = str, cp2 = top; *cp; cp++) | |
37 | *cp2++ = *cp; | |
38 | *cp2 = 0; | |
39 | return(top); | |
40 | } | |
41 | ||
42 | /* | |
43 | * Copy the name from the passed header line into the passed | |
44 | * name buffer. Null pad the name buffer. | |
45 | */ | |
46 | ||
47 | copyname(linebuf, nbuf) | |
48 | char *linebuf, *nbuf; | |
49 | { | |
50 | register char *cp, *cp2; | |
51 | ||
52 | for (cp = linebuf + 5, cp2 = nbuf; *cp != ' ' && cp2-nbuf < 8; cp++) | |
53 | *cp2++ = *cp; | |
54 | while (cp2-nbuf < 8) | |
55 | *cp2++ = 0; | |
56 | } | |
57 | ||
58 | /* | |
59 | * Announce a fatal error and die. | |
60 | */ | |
61 | ||
62 | panic(str) | |
63 | char *str; | |
64 | { | |
65 | prs("panic: "); | |
66 | prs(str); | |
67 | prs("\n"); | |
68 | exit(1); | |
69 | } | |
70 | ||
71 | /* | |
72 | * Catch stdio errors and report them more nicely. | |
73 | */ | |
74 | ||
75 | _error(str) | |
76 | char *str; | |
77 | { | |
78 | prs("Stdio Error: "); | |
79 | prs(str); | |
80 | prs("\n"); | |
81 | abort(); | |
82 | } | |
83 | ||
84 | /* | |
85 | * Print a string on diagnostic output. | |
86 | */ | |
87 | ||
88 | prs(str) | |
89 | char *str; | |
90 | { | |
91 | register char *s; | |
92 | ||
93 | for (s = str; *s; s++) | |
94 | ; | |
95 | write(2, str, s-str); | |
96 | } | |
97 | ||
98 | /* | |
99 | * Touch the named message by setting its MTOUCH flag. | |
100 | * Touched messages have the effect of not being sent | |
101 | * back to the system mailbox on exit. | |
102 | */ | |
103 | ||
104 | touch(mesg) | |
105 | { | |
dffe7e4f KS |
106 | register struct message *mp; |
107 | ||
108 | if (mesg < 1 || mesg > msgCount) | |
109 | return; | |
110 | mp = &message[mesg-1]; | |
111 | mp->m_flag |= MTOUCH; | |
112 | if ((mp->m_flag & MREAD) == 0) | |
113 | mp->m_flag |= MREAD|MSTATUS; | |
6447a23f KS |
114 | } |
115 | ||
116 | /* | |
117 | * Test to see if the passed file name is a directory. | |
118 | * Return true if it is. | |
119 | */ | |
120 | ||
121 | isdir(name) | |
122 | char name[]; | |
123 | { | |
124 | struct stat sbuf; | |
125 | ||
126 | if (stat(name, &sbuf) < 0) | |
127 | return(0); | |
128 | return((sbuf.st_mode & S_IFMT) == S_IFDIR); | |
129 | } | |
130 | ||
6447a23f KS |
131 | /* |
132 | * Count the number of arguments in the given string raw list. | |
133 | */ | |
134 | ||
135 | argcount(argv) | |
136 | char **argv; | |
137 | { | |
138 | register char **ap; | |
139 | ||
140 | for (ap = argv; *ap != NOSTR; ap++) | |
141 | ; | |
142 | return(ap-argv); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Given a file address, determine the | |
147 | * block number it represents. | |
148 | */ | |
149 | ||
150 | blockof(off) | |
151 | off_t off; | |
152 | { | |
153 | off_t a; | |
154 | ||
155 | a = off >> 9; | |
156 | a &= 077777; | |
157 | return((int) a); | |
158 | } | |
159 | ||
160 | /* | |
161 | * Take a file address, and determine | |
162 | * its offset in the current block. | |
163 | */ | |
164 | ||
165 | offsetof(off) | |
166 | off_t off; | |
167 | { | |
168 | off_t a; | |
169 | ||
170 | a = off & 0777; | |
171 | return((int) a); | |
172 | } | |
173 | ||
6447a23f KS |
174 | /* |
175 | * Return the desired header line from the passed message | |
176 | * pointer (or NOSTR if the desired header field is not available). | |
177 | */ | |
178 | ||
179 | char * | |
180 | hfield(field, mp) | |
181 | char field[]; | |
182 | struct message *mp; | |
183 | { | |
184 | register FILE *ibuf; | |
185 | char linebuf[LINESIZE]; | |
186 | register int lc; | |
187 | ||
188 | ibuf = setinput(mp); | |
189 | if ((lc = mp->m_lines) <= 0) | |
190 | return(NOSTR); | |
191 | if (readline(ibuf, linebuf) < 0) | |
192 | return(NOSTR); | |
193 | lc--; | |
194 | do { | |
195 | lc = gethfield(ibuf, linebuf, lc); | |
196 | if (lc == -1) | |
197 | return(NOSTR); | |
198 | if (ishfield(linebuf, field)) | |
199 | return(savestr(hcontents(linebuf))); | |
200 | } while (lc > 0); | |
201 | return(NOSTR); | |
202 | } | |
203 | ||
204 | /* | |
205 | * Return the next header field found in the given message. | |
206 | * Return > 0 if something found, <= 0 elsewise. | |
207 | * Must deal with \ continuations & other such fraud. | |
208 | */ | |
209 | ||
210 | gethfield(f, linebuf, rem) | |
211 | register FILE *f; | |
212 | char linebuf[]; | |
213 | register int rem; | |
214 | { | |
215 | char line2[LINESIZE]; | |
216 | long loc; | |
217 | register char *cp, *cp2; | |
218 | register int c; | |
219 | ||
220 | ||
221 | for (;;) { | |
222 | if (rem <= 0) | |
223 | return(-1); | |
224 | if (readline(f, linebuf) < 0) | |
225 | return(-1); | |
226 | rem--; | |
227 | if (strlen(linebuf) == 0) | |
228 | return(-1); | |
229 | if (isspace(linebuf[0])) | |
230 | continue; | |
231 | if (linebuf[0] == '>') | |
232 | continue; | |
233 | cp = index(linebuf, ':'); | |
234 | if (cp == NOSTR) | |
235 | continue; | |
236 | for (cp2 = linebuf; cp2 < cp; cp2++) | |
237 | if (isdigit(*cp2)) | |
238 | continue; | |
239 | ||
240 | /* | |
241 | * I guess we got a headline. | |
242 | * Handle wraparounding | |
243 | */ | |
244 | ||
245 | for (;;) { | |
246 | if (rem <= 0) | |
247 | break; | |
248 | #ifdef CANTELL | |
249 | loc = ftell(f); | |
250 | if (readline(f, line2) < 0) | |
251 | break; | |
252 | rem--; | |
253 | if (!isspace(line2[0])) { | |
254 | fseek(f, loc, 0); | |
255 | rem++; | |
256 | break; | |
257 | } | |
258 | #else | |
259 | c = getc(f); | |
260 | ungetc(c, f); | |
261 | if (!isspace(c) || c == '\n') | |
262 | break; | |
263 | if (readline(f, line2) < 0) | |
264 | break; | |
265 | rem--; | |
266 | #endif | |
267 | cp2 = line2; | |
268 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
269 | ; | |
270 | if (strlen(linebuf) + strlen(cp2) >= LINESIZE-2) | |
271 | break; | |
272 | cp = &linebuf[strlen(linebuf)]; | |
273 | while (cp > linebuf && | |
274 | (isspace(cp[-1]) || cp[-1] == '\\')) | |
275 | cp--; | |
276 | *cp++ = ' '; | |
277 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
278 | ; | |
279 | strcpy(cp, cp2); | |
280 | } | |
281 | if ((c = strlen(linebuf)) > 0) { | |
282 | cp = &linebuf[c-1]; | |
283 | while (cp > linebuf && isspace(*cp)) | |
284 | cp--; | |
285 | *++cp = 0; | |
286 | } | |
287 | return(rem); | |
288 | } | |
289 | /* NOTREACHED */ | |
290 | } | |
291 | ||
292 | /* | |
293 | * Check whether the passed line is a header line of | |
294 | * the desired breed. | |
295 | */ | |
296 | ||
297 | ishfield(linebuf, field) | |
298 | char linebuf[], field[]; | |
299 | { | |
300 | register char *cp; | |
301 | register int c; | |
302 | ||
303 | if ((cp = index(linebuf, ':')) == NOSTR) | |
304 | return(0); | |
305 | if (cp == linebuf) | |
306 | return(0); | |
307 | cp--; | |
308 | while (cp > linebuf && isspace(*cp)) | |
309 | cp--; | |
310 | c = *++cp; | |
311 | *cp = 0; | |
312 | if (icequal(linebuf ,field)) { | |
313 | *cp = c; | |
314 | return(1); | |
315 | } | |
316 | *cp = c; | |
317 | return(0); | |
318 | } | |
319 | ||
320 | /* | |
321 | * Extract the non label information from the given header field | |
322 | * and return it. | |
323 | */ | |
324 | ||
325 | char * | |
326 | hcontents(hfield) | |
327 | char hfield[]; | |
328 | { | |
329 | register char *cp; | |
330 | ||
331 | if ((cp = index(hfield, ':')) == NOSTR) | |
332 | return(NOSTR); | |
333 | cp++; | |
334 | while (*cp && isspace(*cp)) | |
335 | cp++; | |
336 | return(cp); | |
337 | } | |
338 | ||
339 | /* | |
340 | * Compare two strings, ignoring case. | |
341 | */ | |
342 | ||
343 | icequal(s1, s2) | |
344 | register char *s1, *s2; | |
345 | { | |
346 | ||
347 | while (raise(*s1++) == raise(*s2)) | |
348 | if (*s2++ == 0) | |
349 | return(1); | |
350 | return(0); | |
351 | } | |
352 | ||
da0d3a6d KS |
353 | /* |
354 | * Copy a string, lowercasing it as we go. | |
355 | */ | |
356 | istrcpy(dest, src) | |
357 | char *dest, *src; | |
358 | { | |
359 | register char *cp, *cp2; | |
360 | ||
361 | cp2 = dest; | |
362 | cp = src; | |
363 | do { | |
364 | *cp2++ = little(*cp); | |
365 | } while (*cp++ != 0); | |
366 | } | |
367 | ||
6447a23f KS |
368 | /* |
369 | * The following code deals with input stacking to do source | |
370 | * commands. All but the current file pointer are saved on | |
371 | * the stack. | |
372 | */ | |
373 | ||
374 | static int ssp = -1; /* Top of file stack */ | |
e48b42f1 KS |
375 | struct sstack { |
376 | FILE *s_file; /* File we were in. */ | |
377 | int s_cond; /* Saved state of conditionals */ | |
f4aa38b5 | 378 | int s_loading; /* Loading .mailrc, etc. */ |
46053c99 | 379 | } sstack[NOFILE]; |
6447a23f KS |
380 | |
381 | /* | |
382 | * Pushdown current input file and switch to a new one. | |
383 | * Set the global flag "sourcing" so that others will realize | |
384 | * that they are no longer reading from a tty (in all probability). | |
385 | */ | |
386 | ||
387 | source(name) | |
388 | char name[]; | |
389 | { | |
390 | register FILE *fi; | |
5c7ba847 | 391 | register char *cp; |
6447a23f | 392 | |
5c7ba847 KS |
393 | if ((cp = expand(name)) == NOSTR) |
394 | return(1); | |
395 | if ((fi = fopen(cp, "r")) == NULL) { | |
396 | perror(cp); | |
6447a23f KS |
397 | return(1); |
398 | } | |
46053c99 | 399 | if (ssp >= NOFILE - 2) { |
6447a23f KS |
400 | printf("Too much \"sourcing\" going on.\n"); |
401 | fclose(fi); | |
402 | return(1); | |
403 | } | |
e48b42f1 KS |
404 | sstack[++ssp].s_file = input; |
405 | sstack[ssp].s_cond = cond; | |
f4aa38b5 KS |
406 | sstack[ssp].s_loading = loading; |
407 | loading = 0; | |
e48b42f1 | 408 | cond = CANY; |
6447a23f KS |
409 | input = fi; |
410 | sourcing++; | |
411 | return(0); | |
412 | } | |
413 | ||
414 | /* | |
415 | * Source a file, but do nothing if the file cannot be opened. | |
416 | */ | |
417 | ||
418 | source1(name) | |
419 | char name[]; | |
420 | { | |
421 | register int f; | |
422 | ||
423 | if ((f = open(name, 0)) < 0) | |
424 | return(0); | |
425 | close(f); | |
426 | source(name); | |
427 | } | |
428 | ||
429 | /* | |
430 | * Pop the current input back to the previous level. | |
431 | * Update the "sourcing" flag as appropriate. | |
432 | */ | |
433 | ||
434 | unstack() | |
435 | { | |
436 | if (ssp < 0) { | |
437 | printf("\"Source\" stack over-pop.\n"); | |
438 | sourcing = 0; | |
439 | return(1); | |
440 | } | |
441 | fclose(input); | |
e48b42f1 KS |
442 | if (cond != CANY) |
443 | printf("Unmatched \"if\"\n"); | |
444 | cond = sstack[ssp].s_cond; | |
f4aa38b5 | 445 | loading = sstack[ssp].s_loading; |
e48b42f1 | 446 | input = sstack[ssp--].s_file; |
6447a23f | 447 | if (ssp < 0) |
f4aa38b5 | 448 | sourcing = loading; |
6447a23f KS |
449 | return(0); |
450 | } | |
451 | ||
452 | /* | |
453 | * Touch the indicated file. | |
454 | * This is nifty for the shell. | |
455 | * If we have the utime() system call, this is better served | |
456 | * by using that, since it will work for empty files. | |
457 | * On non-utime systems, we must sleep a second, then read. | |
458 | */ | |
459 | ||
460 | alter(name) | |
461 | char name[]; | |
462 | { | |
463 | #ifdef UTIME | |
464 | struct stat statb; | |
465 | long time(); | |
466 | time_t time_p[2]; | |
467 | #else | |
468 | register int pid, f; | |
469 | char w; | |
470 | #endif UTIME | |
471 | ||
472 | #ifdef UTIME | |
473 | if (stat(name, &statb) < 0) | |
474 | return; | |
475 | time_p[0] = time((long *) 0) + 1; | |
476 | time_p[1] = statb.st_mtime; | |
477 | utime(name, time_p); | |
478 | #else | |
6447a23f KS |
479 | sleep(1); |
480 | if ((f = open(name, 0)) < 0) | |
a0852086 | 481 | return; |
6447a23f KS |
482 | read(f, &w, 1); |
483 | exit(0); | |
484 | #endif | |
485 | } | |
486 | ||
487 | /* | |
488 | * Examine the passed line buffer and | |
489 | * return true if it is all blanks and tabs. | |
490 | */ | |
491 | ||
492 | blankline(linebuf) | |
493 | char linebuf[]; | |
494 | { | |
495 | register char *cp; | |
496 | ||
497 | for (cp = linebuf; *cp; cp++) | |
46053c99 | 498 | if (*cp != ' ' && *cp != '\t') |
6447a23f KS |
499 | return(0); |
500 | return(1); | |
501 | } | |
502 | ||
12388009 KS |
503 | /* |
504 | * Get sender's name from this message. If the message has | |
505 | * a bunch of arpanet stuff in it, we may have to skin the name | |
506 | * before returning it. | |
507 | */ | |
508 | char * | |
509 | nameof(mp, reptype) | |
510 | register struct message *mp; | |
511 | { | |
8bcfa450 | 512 | register char *cp, *cp2; |
12388009 | 513 | |
8bcfa450 KS |
514 | cp = skin(name1(mp, reptype)); |
515 | if (reptype != 0 || charcount(cp, '!') < 2) | |
516 | return(cp); | |
517 | cp2 = rindex(cp, '!'); | |
518 | cp2--; | |
519 | while (cp2 > cp && *cp2 != '!') | |
520 | cp2--; | |
521 | if (*cp2 == '!') | |
522 | return(cp2 + 1); | |
523 | return(cp); | |
12388009 KS |
524 | } |
525 | ||
526 | /* | |
b4817aab | 527 | * Skin an arpa net address according to the RFC 822 interpretation |
12388009 KS |
528 | * of "host-phrase." |
529 | */ | |
530 | char * | |
531 | skin(name) | |
532 | char *name; | |
533 | { | |
534 | register int c; | |
535 | register char *cp, *cp2; | |
b4817aab | 536 | char *bufend; |
12388009 KS |
537 | int gotlt, lastsp; |
538 | char nbuf[BUFSIZ]; | |
46053c99 | 539 | int nesting; |
12388009 KS |
540 | |
541 | if (name == NOSTR) | |
542 | return(NOSTR); | |
e557a09a CL |
543 | if (index(name, '(') == NOSTR && index(name, '<') == NOSTR |
544 | && index(name, ' ') == NOSTR) | |
12388009 KS |
545 | return(name); |
546 | gotlt = 0; | |
547 | lastsp = 0; | |
b4817aab KM |
548 | bufend = nbuf; |
549 | for (cp = name, cp2 = bufend; c = *cp++; ) { | |
12388009 KS |
550 | switch (c) { |
551 | case '(': | |
b4817aab KM |
552 | /* |
553 | * Start of a "comment". | |
554 | * Ignore it. | |
555 | */ | |
46053c99 | 556 | nesting = 1; |
b4817aab KM |
557 | while ((c = *cp) != 0) { |
558 | cp++; | |
559 | switch (c) { | |
560 | case '\\': | |
561 | if (*cp == 0) | |
562 | goto outcm; | |
563 | cp++; | |
564 | break; | |
46053c99 S |
565 | case '(': |
566 | nesting++; | |
567 | break; | |
568 | ||
569 | case ')': | |
570 | --nesting; | |
571 | break; | |
572 | } | |
573 | ||
574 | if (nesting <= 0) | |
575 | break; | |
576 | } | |
b4817aab KM |
577 | outcm: |
578 | lastsp = 0; | |
579 | break; | |
580 | ||
581 | case '"': | |
582 | /* | |
583 | * Start of a "quoted-string". | |
584 | * Copy it in its entirety. | |
585 | */ | |
586 | while ((c = *cp) != 0) { | |
587 | cp++; | |
588 | switch (c) { | |
589 | case '\\': | |
590 | if ((c = *cp) == 0) | |
591 | goto outqs; | |
592 | cp++; | |
593 | break; | |
594 | case '"': | |
595 | goto outqs; | |
596 | } | |
597 | *cp2++ = c; | |
598 | } | |
599 | outqs: | |
e557a09a | 600 | lastsp = 0; |
12388009 KS |
601 | break; |
602 | ||
603 | case ' ': | |
e557a09a CL |
604 | if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ') |
605 | cp += 3, *cp2++ = '@'; | |
606 | else | |
607 | if (cp[0] == '@' && cp[1] == ' ') | |
608 | cp += 2, *cp2++ = '@'; | |
609 | else | |
610 | lastsp = 1; | |
12388009 KS |
611 | break; |
612 | ||
613 | case '<': | |
b4817aab | 614 | cp2 = bufend; |
12388009 KS |
615 | gotlt++; |
616 | lastsp = 0; | |
617 | break; | |
618 | ||
619 | case '>': | |
b4817aab KM |
620 | if (gotlt) { |
621 | gotlt = 0; | |
622 | while (*cp != ',' && *cp != 0) | |
623 | cp++; | |
624 | if (*cp == 0 ) | |
625 | goto done; | |
626 | *cp2++ = ','; | |
627 | *cp2++ = ' '; | |
628 | bufend = cp2; | |
629 | break; | |
630 | } | |
12388009 KS |
631 | |
632 | /* Fall into . . . */ | |
633 | ||
634 | default: | |
635 | if (lastsp) { | |
636 | lastsp = 0; | |
637 | *cp2++ = ' '; | |
638 | } | |
639 | *cp2++ = c; | |
640 | break; | |
641 | } | |
642 | } | |
643 | done: | |
644 | *cp2 = 0; | |
645 | ||
646 | return(savestr(nbuf)); | |
647 | } | |
648 | ||
6447a23f KS |
649 | /* |
650 | * Fetch the sender's name from the passed message. | |
12388009 KS |
651 | * Reptype can be |
652 | * 0 -- get sender's name for display purposes | |
653 | * 1 -- get sender's name for reply | |
654 | * 2 -- get sender's name for Reply | |
6447a23f KS |
655 | */ |
656 | ||
657 | char * | |
12388009 | 658 | name1(mp, reptype) |
6447a23f KS |
659 | register struct message *mp; |
660 | { | |
661 | char namebuf[LINESIZE]; | |
662 | char linebuf[LINESIZE]; | |
663 | register char *cp, *cp2; | |
664 | register FILE *ibuf; | |
665 | int first = 1; | |
666 | ||
12388009 KS |
667 | if ((cp = hfield("from", mp)) != NOSTR) |
668 | return(cp); | |
669 | if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR) | |
670 | return(cp); | |
6447a23f KS |
671 | ibuf = setinput(mp); |
672 | copy("", namebuf); | |
673 | if (readline(ibuf, linebuf) <= 0) | |
674 | return(savestr(namebuf)); | |
675 | newname: | |
676 | for (cp = linebuf; *cp != ' '; cp++) | |
677 | ; | |
678 | while (any(*cp, " \t")) | |
679 | cp++; | |
680 | for (cp2 = &namebuf[strlen(namebuf)]; *cp && !any(*cp, " \t") && | |
681 | cp2-namebuf < LINESIZE-1; *cp2++ = *cp++) | |
682 | ; | |
683 | *cp2 = '\0'; | |
684 | if (readline(ibuf, linebuf) <= 0) | |
685 | return(savestr(namebuf)); | |
686 | if ((cp = index(linebuf, 'F')) == NULL) | |
687 | return(savestr(namebuf)); | |
688 | if (strncmp(cp, "From", 4) != 0) | |
689 | return(savestr(namebuf)); | |
690 | while ((cp = index(cp, 'r')) != NULL) { | |
691 | if (strncmp(cp, "remote", 6) == 0) { | |
692 | if ((cp = index(cp, 'f')) == NULL) | |
693 | break; | |
694 | if (strncmp(cp, "from", 4) != 0) | |
695 | break; | |
696 | if ((cp = index(cp, ' ')) == NULL) | |
697 | break; | |
698 | cp++; | |
699 | if (first) { | |
700 | copy(cp, namebuf); | |
701 | first = 0; | |
702 | } else | |
703 | strcpy(rindex(namebuf, '!')+1, cp); | |
704 | strcat(namebuf, "!"); | |
705 | goto newname; | |
706 | } | |
707 | cp++; | |
708 | } | |
709 | return(savestr(namebuf)); | |
710 | } | |
711 | ||
8bcfa450 KS |
712 | /* |
713 | * Count the occurances of c in str | |
714 | */ | |
715 | charcount(str, c) | |
716 | char *str; | |
717 | { | |
718 | register char *cp; | |
719 | register int i; | |
720 | ||
721 | for (i = 0, cp = str; *cp; cp++) | |
722 | if (*cp == c) | |
723 | i++; | |
724 | return(i); | |
725 | } | |
726 | ||
6447a23f KS |
727 | /* |
728 | * Find the rightmost pointer to an instance of the | |
729 | * character in the string and return it. | |
730 | */ | |
6447a23f KS |
731 | char * |
732 | rindex(str, c) | |
733 | char str[]; | |
734 | register int c; | |
735 | { | |
736 | register char *cp, *cp2; | |
737 | ||
738 | for (cp = str, cp2 = NOSTR; *cp; cp++) | |
739 | if (c == *cp) | |
740 | cp2 = cp; | |
741 | return(cp2); | |
742 | } | |
743 | ||
744 | /* | |
745 | * See if the string is a number. | |
746 | */ | |
747 | ||
748 | numeric(str) | |
749 | char str[]; | |
750 | { | |
751 | register char *cp = str; | |
752 | ||
753 | while (*cp) | |
754 | if (!isdigit(*cp++)) | |
755 | return(0); | |
756 | return(1); | |
757 | } | |
758 | ||
759 | /* | |
760 | * Are any of the characters in the two strings the same? | |
761 | */ | |
762 | ||
763 | anyof(s1, s2) | |
764 | register char *s1, *s2; | |
765 | { | |
766 | register int c; | |
767 | ||
768 | while (c = *s1++) | |
769 | if (any(c, s2)) | |
770 | return(1); | |
771 | return(0); | |
772 | } | |
773 | ||
774 | /* | |
775 | * Determine the leftmost index of the character | |
776 | * in the string. | |
777 | */ | |
778 | ||
779 | char * | |
780 | index(str, ch) | |
781 | char *str; | |
782 | { | |
783 | register char *cp; | |
784 | register int c; | |
785 | ||
786 | for (c = ch, cp = str; *cp; cp++) | |
787 | if (*cp == c) | |
788 | return(cp); | |
789 | return(NOSTR); | |
790 | } | |
791 | ||
da0d3a6d KS |
792 | /* |
793 | * See if the given header field is supposed to be ignored. | |
794 | */ | |
795 | isign(field) | |
796 | char *field; | |
797 | { | |
798 | char realfld[BUFSIZ]; | |
da0d3a6d | 799 | |
46053c99 S |
800 | /* |
801 | * Lower-case the string, so that "Status" and "status" | |
802 | * will hash to the same place. | |
803 | */ | |
da0d3a6d | 804 | istrcpy(realfld, field); |
46053c99 S |
805 | |
806 | if (nretained > 0) | |
807 | return (!member(realfld, retain)); | |
808 | else | |
809 | return (member(realfld, ignore)); | |
810 | } | |
811 | ||
812 | member(realfield, table) | |
813 | register char *realfield; | |
814 | register struct ignore **table; | |
815 | { | |
816 | register struct ignore *igp; | |
817 | ||
818 | for (igp = table[hash(realfield)]; igp != 0; igp = igp->i_link) | |
819 | if (equal(igp->i_field, realfield)) | |
820 | return (1); | |
821 | ||
822 | return (0); | |
da0d3a6d | 823 | } |