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 |
d0aeaf5a DF |
8 | static char sccsid[] = "@(#)aux.c 5.1 (Berkeley) %G%"; |
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 | ||
174 | /* | |
175 | * Determine if the passed file is actually a tty, via a call to | |
176 | * gtty. This is not totally reliable, but . . . | |
177 | */ | |
178 | ||
179 | isatty(f) | |
180 | { | |
181 | struct sgttyb buf; | |
182 | ||
183 | if (gtty(f, &buf) < 0) | |
184 | return(0); | |
185 | return(1); | |
186 | } | |
187 | ||
188 | /* | |
189 | * Return the desired header line from the passed message | |
190 | * pointer (or NOSTR if the desired header field is not available). | |
191 | */ | |
192 | ||
193 | char * | |
194 | hfield(field, mp) | |
195 | char field[]; | |
196 | struct message *mp; | |
197 | { | |
198 | register FILE *ibuf; | |
199 | char linebuf[LINESIZE]; | |
200 | register int lc; | |
201 | ||
202 | ibuf = setinput(mp); | |
203 | if ((lc = mp->m_lines) <= 0) | |
204 | return(NOSTR); | |
205 | if (readline(ibuf, linebuf) < 0) | |
206 | return(NOSTR); | |
207 | lc--; | |
208 | do { | |
209 | lc = gethfield(ibuf, linebuf, lc); | |
210 | if (lc == -1) | |
211 | return(NOSTR); | |
212 | if (ishfield(linebuf, field)) | |
213 | return(savestr(hcontents(linebuf))); | |
214 | } while (lc > 0); | |
215 | return(NOSTR); | |
216 | } | |
217 | ||
218 | /* | |
219 | * Return the next header field found in the given message. | |
220 | * Return > 0 if something found, <= 0 elsewise. | |
221 | * Must deal with \ continuations & other such fraud. | |
222 | */ | |
223 | ||
224 | gethfield(f, linebuf, rem) | |
225 | register FILE *f; | |
226 | char linebuf[]; | |
227 | register int rem; | |
228 | { | |
229 | char line2[LINESIZE]; | |
230 | long loc; | |
231 | register char *cp, *cp2; | |
232 | register int c; | |
233 | ||
234 | ||
235 | for (;;) { | |
236 | if (rem <= 0) | |
237 | return(-1); | |
238 | if (readline(f, linebuf) < 0) | |
239 | return(-1); | |
240 | rem--; | |
241 | if (strlen(linebuf) == 0) | |
242 | return(-1); | |
243 | if (isspace(linebuf[0])) | |
244 | continue; | |
245 | if (linebuf[0] == '>') | |
246 | continue; | |
247 | cp = index(linebuf, ':'); | |
248 | if (cp == NOSTR) | |
249 | continue; | |
250 | for (cp2 = linebuf; cp2 < cp; cp2++) | |
251 | if (isdigit(*cp2)) | |
252 | continue; | |
253 | ||
254 | /* | |
255 | * I guess we got a headline. | |
256 | * Handle wraparounding | |
257 | */ | |
258 | ||
259 | for (;;) { | |
260 | if (rem <= 0) | |
261 | break; | |
262 | #ifdef CANTELL | |
263 | loc = ftell(f); | |
264 | if (readline(f, line2) < 0) | |
265 | break; | |
266 | rem--; | |
267 | if (!isspace(line2[0])) { | |
268 | fseek(f, loc, 0); | |
269 | rem++; | |
270 | break; | |
271 | } | |
272 | #else | |
273 | c = getc(f); | |
274 | ungetc(c, f); | |
275 | if (!isspace(c) || c == '\n') | |
276 | break; | |
277 | if (readline(f, line2) < 0) | |
278 | break; | |
279 | rem--; | |
280 | #endif | |
281 | cp2 = line2; | |
282 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
283 | ; | |
284 | if (strlen(linebuf) + strlen(cp2) >= LINESIZE-2) | |
285 | break; | |
286 | cp = &linebuf[strlen(linebuf)]; | |
287 | while (cp > linebuf && | |
288 | (isspace(cp[-1]) || cp[-1] == '\\')) | |
289 | cp--; | |
290 | *cp++ = ' '; | |
291 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
292 | ; | |
293 | strcpy(cp, cp2); | |
294 | } | |
295 | if ((c = strlen(linebuf)) > 0) { | |
296 | cp = &linebuf[c-1]; | |
297 | while (cp > linebuf && isspace(*cp)) | |
298 | cp--; | |
299 | *++cp = 0; | |
300 | } | |
301 | return(rem); | |
302 | } | |
303 | /* NOTREACHED */ | |
304 | } | |
305 | ||
306 | /* | |
307 | * Check whether the passed line is a header line of | |
308 | * the desired breed. | |
309 | */ | |
310 | ||
311 | ishfield(linebuf, field) | |
312 | char linebuf[], field[]; | |
313 | { | |
314 | register char *cp; | |
315 | register int c; | |
316 | ||
317 | if ((cp = index(linebuf, ':')) == NOSTR) | |
318 | return(0); | |
319 | if (cp == linebuf) | |
320 | return(0); | |
321 | cp--; | |
322 | while (cp > linebuf && isspace(*cp)) | |
323 | cp--; | |
324 | c = *++cp; | |
325 | *cp = 0; | |
326 | if (icequal(linebuf ,field)) { | |
327 | *cp = c; | |
328 | return(1); | |
329 | } | |
330 | *cp = c; | |
331 | return(0); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Extract the non label information from the given header field | |
336 | * and return it. | |
337 | */ | |
338 | ||
339 | char * | |
340 | hcontents(hfield) | |
341 | char hfield[]; | |
342 | { | |
343 | register char *cp; | |
344 | ||
345 | if ((cp = index(hfield, ':')) == NOSTR) | |
346 | return(NOSTR); | |
347 | cp++; | |
348 | while (*cp && isspace(*cp)) | |
349 | cp++; | |
350 | return(cp); | |
351 | } | |
352 | ||
353 | /* | |
354 | * Compare two strings, ignoring case. | |
355 | */ | |
356 | ||
357 | icequal(s1, s2) | |
358 | register char *s1, *s2; | |
359 | { | |
360 | ||
361 | while (raise(*s1++) == raise(*s2)) | |
362 | if (*s2++ == 0) | |
363 | return(1); | |
364 | return(0); | |
365 | } | |
366 | ||
da0d3a6d KS |
367 | /* |
368 | * Copy a string, lowercasing it as we go. | |
369 | */ | |
370 | istrcpy(dest, src) | |
371 | char *dest, *src; | |
372 | { | |
373 | register char *cp, *cp2; | |
374 | ||
375 | cp2 = dest; | |
376 | cp = src; | |
377 | do { | |
378 | *cp2++ = little(*cp); | |
379 | } while (*cp++ != 0); | |
380 | } | |
381 | ||
6447a23f KS |
382 | /* |
383 | * The following code deals with input stacking to do source | |
384 | * commands. All but the current file pointer are saved on | |
385 | * the stack. | |
386 | */ | |
387 | ||
388 | static int ssp = -1; /* Top of file stack */ | |
e48b42f1 KS |
389 | struct sstack { |
390 | FILE *s_file; /* File we were in. */ | |
391 | int s_cond; /* Saved state of conditionals */ | |
f4aa38b5 | 392 | int s_loading; /* Loading .mailrc, etc. */ |
46053c99 | 393 | } sstack[NOFILE]; |
6447a23f KS |
394 | |
395 | /* | |
396 | * Pushdown current input file and switch to a new one. | |
397 | * Set the global flag "sourcing" so that others will realize | |
398 | * that they are no longer reading from a tty (in all probability). | |
399 | */ | |
400 | ||
401 | source(name) | |
402 | char name[]; | |
403 | { | |
404 | register FILE *fi; | |
5c7ba847 | 405 | register char *cp; |
6447a23f | 406 | |
5c7ba847 KS |
407 | if ((cp = expand(name)) == NOSTR) |
408 | return(1); | |
409 | if ((fi = fopen(cp, "r")) == NULL) { | |
410 | perror(cp); | |
6447a23f KS |
411 | return(1); |
412 | } | |
46053c99 | 413 | if (ssp >= NOFILE - 2) { |
6447a23f KS |
414 | printf("Too much \"sourcing\" going on.\n"); |
415 | fclose(fi); | |
416 | return(1); | |
417 | } | |
e48b42f1 KS |
418 | sstack[++ssp].s_file = input; |
419 | sstack[ssp].s_cond = cond; | |
f4aa38b5 KS |
420 | sstack[ssp].s_loading = loading; |
421 | loading = 0; | |
e48b42f1 | 422 | cond = CANY; |
6447a23f KS |
423 | input = fi; |
424 | sourcing++; | |
425 | return(0); | |
426 | } | |
427 | ||
428 | /* | |
429 | * Source a file, but do nothing if the file cannot be opened. | |
430 | */ | |
431 | ||
432 | source1(name) | |
433 | char name[]; | |
434 | { | |
435 | register int f; | |
436 | ||
437 | if ((f = open(name, 0)) < 0) | |
438 | return(0); | |
439 | close(f); | |
440 | source(name); | |
441 | } | |
442 | ||
443 | /* | |
444 | * Pop the current input back to the previous level. | |
445 | * Update the "sourcing" flag as appropriate. | |
446 | */ | |
447 | ||
448 | unstack() | |
449 | { | |
450 | if (ssp < 0) { | |
451 | printf("\"Source\" stack over-pop.\n"); | |
452 | sourcing = 0; | |
453 | return(1); | |
454 | } | |
455 | fclose(input); | |
e48b42f1 KS |
456 | if (cond != CANY) |
457 | printf("Unmatched \"if\"\n"); | |
458 | cond = sstack[ssp].s_cond; | |
f4aa38b5 | 459 | loading = sstack[ssp].s_loading; |
e48b42f1 | 460 | input = sstack[ssp--].s_file; |
6447a23f | 461 | if (ssp < 0) |
f4aa38b5 | 462 | sourcing = loading; |
6447a23f KS |
463 | return(0); |
464 | } | |
465 | ||
466 | /* | |
467 | * Touch the indicated file. | |
468 | * This is nifty for the shell. | |
469 | * If we have the utime() system call, this is better served | |
470 | * by using that, since it will work for empty files. | |
471 | * On non-utime systems, we must sleep a second, then read. | |
472 | */ | |
473 | ||
474 | alter(name) | |
475 | char name[]; | |
476 | { | |
477 | #ifdef UTIME | |
478 | struct stat statb; | |
479 | long time(); | |
480 | time_t time_p[2]; | |
481 | #else | |
482 | register int pid, f; | |
483 | char w; | |
484 | #endif UTIME | |
485 | ||
486 | #ifdef UTIME | |
487 | if (stat(name, &statb) < 0) | |
488 | return; | |
489 | time_p[0] = time((long *) 0) + 1; | |
490 | time_p[1] = statb.st_mtime; | |
491 | utime(name, time_p); | |
492 | #else | |
6447a23f KS |
493 | sleep(1); |
494 | if ((f = open(name, 0)) < 0) | |
a0852086 | 495 | return; |
6447a23f KS |
496 | read(f, &w, 1); |
497 | exit(0); | |
498 | #endif | |
499 | } | |
500 | ||
501 | /* | |
502 | * Examine the passed line buffer and | |
503 | * return true if it is all blanks and tabs. | |
504 | */ | |
505 | ||
506 | blankline(linebuf) | |
507 | char linebuf[]; | |
508 | { | |
509 | register char *cp; | |
510 | ||
511 | for (cp = linebuf; *cp; cp++) | |
46053c99 | 512 | if (*cp != ' ' && *cp != '\t') |
6447a23f KS |
513 | return(0); |
514 | return(1); | |
515 | } | |
516 | ||
12388009 KS |
517 | /* |
518 | * Get sender's name from this message. If the message has | |
519 | * a bunch of arpanet stuff in it, we may have to skin the name | |
520 | * before returning it. | |
521 | */ | |
522 | char * | |
523 | nameof(mp, reptype) | |
524 | register struct message *mp; | |
525 | { | |
8bcfa450 | 526 | register char *cp, *cp2; |
12388009 | 527 | |
8bcfa450 KS |
528 | cp = skin(name1(mp, reptype)); |
529 | if (reptype != 0 || charcount(cp, '!') < 2) | |
530 | return(cp); | |
531 | cp2 = rindex(cp, '!'); | |
532 | cp2--; | |
533 | while (cp2 > cp && *cp2 != '!') | |
534 | cp2--; | |
535 | if (*cp2 == '!') | |
536 | return(cp2 + 1); | |
537 | return(cp); | |
12388009 KS |
538 | } |
539 | ||
540 | /* | |
541 | * Skin an arpa net address according to the RFC 733 interpretation | |
542 | * of "host-phrase." | |
543 | */ | |
544 | char * | |
545 | skin(name) | |
546 | char *name; | |
547 | { | |
548 | register int c; | |
549 | register char *cp, *cp2; | |
550 | int gotlt, lastsp; | |
551 | char nbuf[BUFSIZ]; | |
46053c99 | 552 | int nesting; |
12388009 KS |
553 | |
554 | if (name == NOSTR) | |
555 | return(NOSTR); | |
e557a09a CL |
556 | if (index(name, '(') == NOSTR && index(name, '<') == NOSTR |
557 | && index(name, ' ') == NOSTR) | |
12388009 KS |
558 | return(name); |
559 | gotlt = 0; | |
560 | lastsp = 0; | |
e557a09a | 561 | for (cp = name, cp2 = nbuf; c = *cp++; ) { |
12388009 KS |
562 | switch (c) { |
563 | case '(': | |
46053c99 S |
564 | nesting = 1; |
565 | while (*cp != '\0') { | |
566 | switch (*cp++) { | |
567 | case '(': | |
568 | nesting++; | |
569 | break; | |
570 | ||
571 | case ')': | |
572 | --nesting; | |
573 | break; | |
574 | } | |
575 | ||
576 | if (nesting <= 0) | |
577 | break; | |
578 | } | |
e557a09a | 579 | lastsp = 0; |
12388009 KS |
580 | break; |
581 | ||
582 | case ' ': | |
e557a09a CL |
583 | if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ') |
584 | cp += 3, *cp2++ = '@'; | |
585 | else | |
586 | if (cp[0] == '@' && cp[1] == ' ') | |
587 | cp += 2, *cp2++ = '@'; | |
588 | else | |
589 | lastsp = 1; | |
12388009 KS |
590 | break; |
591 | ||
592 | case '<': | |
593 | cp2 = nbuf; | |
594 | gotlt++; | |
595 | lastsp = 0; | |
596 | break; | |
597 | ||
598 | case '>': | |
599 | if (gotlt) | |
600 | goto done; | |
601 | ||
602 | /* Fall into . . . */ | |
603 | ||
604 | default: | |
605 | if (lastsp) { | |
606 | lastsp = 0; | |
607 | *cp2++ = ' '; | |
608 | } | |
609 | *cp2++ = c; | |
610 | break; | |
611 | } | |
612 | } | |
613 | done: | |
614 | *cp2 = 0; | |
615 | ||
616 | return(savestr(nbuf)); | |
617 | } | |
618 | ||
6447a23f KS |
619 | /* |
620 | * Fetch the sender's name from the passed message. | |
12388009 KS |
621 | * Reptype can be |
622 | * 0 -- get sender's name for display purposes | |
623 | * 1 -- get sender's name for reply | |
624 | * 2 -- get sender's name for Reply | |
6447a23f KS |
625 | */ |
626 | ||
627 | char * | |
12388009 | 628 | name1(mp, reptype) |
6447a23f KS |
629 | register struct message *mp; |
630 | { | |
631 | char namebuf[LINESIZE]; | |
632 | char linebuf[LINESIZE]; | |
633 | register char *cp, *cp2; | |
634 | register FILE *ibuf; | |
635 | int first = 1; | |
636 | ||
12388009 KS |
637 | if ((cp = hfield("from", mp)) != NOSTR) |
638 | return(cp); | |
639 | if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR) | |
640 | return(cp); | |
6447a23f KS |
641 | ibuf = setinput(mp); |
642 | copy("", namebuf); | |
643 | if (readline(ibuf, linebuf) <= 0) | |
644 | return(savestr(namebuf)); | |
645 | newname: | |
646 | for (cp = linebuf; *cp != ' '; cp++) | |
647 | ; | |
648 | while (any(*cp, " \t")) | |
649 | cp++; | |
650 | for (cp2 = &namebuf[strlen(namebuf)]; *cp && !any(*cp, " \t") && | |
651 | cp2-namebuf < LINESIZE-1; *cp2++ = *cp++) | |
652 | ; | |
653 | *cp2 = '\0'; | |
654 | if (readline(ibuf, linebuf) <= 0) | |
655 | return(savestr(namebuf)); | |
656 | if ((cp = index(linebuf, 'F')) == NULL) | |
657 | return(savestr(namebuf)); | |
658 | if (strncmp(cp, "From", 4) != 0) | |
659 | return(savestr(namebuf)); | |
660 | while ((cp = index(cp, 'r')) != NULL) { | |
661 | if (strncmp(cp, "remote", 6) == 0) { | |
662 | if ((cp = index(cp, 'f')) == NULL) | |
663 | break; | |
664 | if (strncmp(cp, "from", 4) != 0) | |
665 | break; | |
666 | if ((cp = index(cp, ' ')) == NULL) | |
667 | break; | |
668 | cp++; | |
669 | if (first) { | |
670 | copy(cp, namebuf); | |
671 | first = 0; | |
672 | } else | |
673 | strcpy(rindex(namebuf, '!')+1, cp); | |
674 | strcat(namebuf, "!"); | |
675 | goto newname; | |
676 | } | |
677 | cp++; | |
678 | } | |
679 | return(savestr(namebuf)); | |
680 | } | |
681 | ||
8bcfa450 KS |
682 | /* |
683 | * Count the occurances of c in str | |
684 | */ | |
685 | charcount(str, c) | |
686 | char *str; | |
687 | { | |
688 | register char *cp; | |
689 | register int i; | |
690 | ||
691 | for (i = 0, cp = str; *cp; cp++) | |
692 | if (*cp == c) | |
693 | i++; | |
694 | return(i); | |
695 | } | |
696 | ||
6447a23f KS |
697 | /* |
698 | * Find the rightmost pointer to an instance of the | |
699 | * character in the string and return it. | |
700 | */ | |
6447a23f KS |
701 | char * |
702 | rindex(str, c) | |
703 | char str[]; | |
704 | register int c; | |
705 | { | |
706 | register char *cp, *cp2; | |
707 | ||
708 | for (cp = str, cp2 = NOSTR; *cp; cp++) | |
709 | if (c == *cp) | |
710 | cp2 = cp; | |
711 | return(cp2); | |
712 | } | |
713 | ||
714 | /* | |
715 | * See if the string is a number. | |
716 | */ | |
717 | ||
718 | numeric(str) | |
719 | char str[]; | |
720 | { | |
721 | register char *cp = str; | |
722 | ||
723 | while (*cp) | |
724 | if (!isdigit(*cp++)) | |
725 | return(0); | |
726 | return(1); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Are any of the characters in the two strings the same? | |
731 | */ | |
732 | ||
733 | anyof(s1, s2) | |
734 | register char *s1, *s2; | |
735 | { | |
736 | register int c; | |
737 | ||
738 | while (c = *s1++) | |
739 | if (any(c, s2)) | |
740 | return(1); | |
741 | return(0); | |
742 | } | |
743 | ||
744 | /* | |
745 | * Determine the leftmost index of the character | |
746 | * in the string. | |
747 | */ | |
748 | ||
749 | char * | |
750 | index(str, ch) | |
751 | char *str; | |
752 | { | |
753 | register char *cp; | |
754 | register int c; | |
755 | ||
756 | for (c = ch, cp = str; *cp; cp++) | |
757 | if (*cp == c) | |
758 | return(cp); | |
759 | return(NOSTR); | |
760 | } | |
761 | ||
762 | /* | |
763 | * String compare two strings of bounded length. | |
764 | */ | |
765 | ||
766 | strncmp(as1, as2, an) | |
767 | char *as1, *as2; | |
768 | { | |
769 | register char *s1, *s2; | |
770 | register int n; | |
771 | ||
772 | s1 = as1; | |
773 | s2 = as2; | |
774 | n = an; | |
775 | while (--n >= 0 && *s1 == *s2++) | |
776 | if (*s1++ == '\0') | |
777 | return(0); | |
778 | return(n<0 ? 0 : *s1 - *--s2); | |
779 | } | |
780 | ||
da0d3a6d KS |
781 | /* |
782 | * See if the given header field is supposed to be ignored. | |
783 | */ | |
784 | isign(field) | |
785 | char *field; | |
786 | { | |
787 | char realfld[BUFSIZ]; | |
da0d3a6d | 788 | |
46053c99 S |
789 | /* |
790 | * Lower-case the string, so that "Status" and "status" | |
791 | * will hash to the same place. | |
792 | */ | |
da0d3a6d | 793 | istrcpy(realfld, field); |
46053c99 S |
794 | |
795 | if (nretained > 0) | |
796 | return (!member(realfld, retain)); | |
797 | else | |
798 | return (member(realfld, ignore)); | |
799 | } | |
800 | ||
801 | member(realfield, table) | |
802 | register char *realfield; | |
803 | register struct ignore **table; | |
804 | { | |
805 | register struct ignore *igp; | |
806 | ||
807 | for (igp = table[hash(realfield)]; igp != 0; igp = igp->i_link) | |
808 | if (equal(igp->i_field, realfield)) | |
809 | return (1); | |
810 | ||
811 | return (0); | |
da0d3a6d | 812 | } |