Commit | Line | Data |
---|---|---|
6447a23f KS |
1 | # |
2 | ||
3 | #include "rcv.h" | |
4 | #include <sys/stat.h> | |
6447a23f KS |
5 | #include <ctype.h> |
6 | ||
7 | /* | |
8 | * Mail -- a mail program | |
9 | * | |
10 | * Auxiliary functions. | |
11 | */ | |
12 | ||
da0d3a6d | 13 | static char *SccsId = "@(#)aux.c 2.6 %G%"; |
6447a23f KS |
14 | |
15 | /* | |
16 | * Return a pointer to a dynamic copy of the argument. | |
17 | */ | |
18 | ||
19 | char * | |
20 | savestr(str) | |
21 | char *str; | |
22 | { | |
23 | register char *cp, *cp2, *top; | |
24 | ||
25 | for (cp = str; *cp; cp++) | |
26 | ; | |
27 | top = salloc(cp-str + 1); | |
28 | if (top == NOSTR) | |
29 | return(NOSTR); | |
30 | for (cp = str, cp2 = top; *cp; cp++) | |
31 | *cp2++ = *cp; | |
32 | *cp2 = 0; | |
33 | return(top); | |
34 | } | |
35 | ||
36 | /* | |
37 | * Copy the name from the passed header line into the passed | |
38 | * name buffer. Null pad the name buffer. | |
39 | */ | |
40 | ||
41 | copyname(linebuf, nbuf) | |
42 | char *linebuf, *nbuf; | |
43 | { | |
44 | register char *cp, *cp2; | |
45 | ||
46 | for (cp = linebuf + 5, cp2 = nbuf; *cp != ' ' && cp2-nbuf < 8; cp++) | |
47 | *cp2++ = *cp; | |
48 | while (cp2-nbuf < 8) | |
49 | *cp2++ = 0; | |
50 | } | |
51 | ||
52 | /* | |
53 | * Announce a fatal error and die. | |
54 | */ | |
55 | ||
56 | panic(str) | |
57 | char *str; | |
58 | { | |
59 | prs("panic: "); | |
60 | prs(str); | |
61 | prs("\n"); | |
62 | exit(1); | |
63 | } | |
64 | ||
65 | /* | |
66 | * Catch stdio errors and report them more nicely. | |
67 | */ | |
68 | ||
69 | _error(str) | |
70 | char *str; | |
71 | { | |
72 | prs("Stdio Error: "); | |
73 | prs(str); | |
74 | prs("\n"); | |
75 | abort(); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Print a string on diagnostic output. | |
80 | */ | |
81 | ||
82 | prs(str) | |
83 | char *str; | |
84 | { | |
85 | register char *s; | |
86 | ||
87 | for (s = str; *s; s++) | |
88 | ; | |
89 | write(2, str, s-str); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Touch the named message by setting its MTOUCH flag. | |
94 | * Touched messages have the effect of not being sent | |
95 | * back to the system mailbox on exit. | |
96 | */ | |
97 | ||
98 | touch(mesg) | |
99 | { | |
dffe7e4f KS |
100 | register struct message *mp; |
101 | ||
102 | if (mesg < 1 || mesg > msgCount) | |
103 | return; | |
104 | mp = &message[mesg-1]; | |
105 | mp->m_flag |= MTOUCH; | |
106 | if ((mp->m_flag & MREAD) == 0) | |
107 | mp->m_flag |= MREAD|MSTATUS; | |
6447a23f KS |
108 | } |
109 | ||
110 | /* | |
111 | * Test to see if the passed file name is a directory. | |
112 | * Return true if it is. | |
113 | */ | |
114 | ||
115 | isdir(name) | |
116 | char name[]; | |
117 | { | |
118 | struct stat sbuf; | |
119 | ||
120 | if (stat(name, &sbuf) < 0) | |
121 | return(0); | |
122 | return((sbuf.st_mode & S_IFMT) == S_IFDIR); | |
123 | } | |
124 | ||
125 | /* | |
126 | * Compute the size in characters of the passed message | |
127 | */ | |
128 | ||
129 | unsigned int | |
130 | msize(messp) | |
131 | struct message *messp; | |
132 | { | |
133 | register struct message *mp; | |
134 | ||
135 | mp = messp; | |
136 | return(mp->m_size); | |
137 | } | |
138 | ||
139 | /* | |
140 | * Count the number of arguments in the given string raw list. | |
141 | */ | |
142 | ||
143 | argcount(argv) | |
144 | char **argv; | |
145 | { | |
146 | register char **ap; | |
147 | ||
148 | for (ap = argv; *ap != NOSTR; ap++) | |
149 | ; | |
150 | return(ap-argv); | |
151 | } | |
152 | ||
153 | /* | |
154 | * Given a file address, determine the | |
155 | * block number it represents. | |
156 | */ | |
157 | ||
158 | blockof(off) | |
159 | off_t off; | |
160 | { | |
161 | off_t a; | |
162 | ||
163 | a = off >> 9; | |
164 | a &= 077777; | |
165 | return((int) a); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Take a file address, and determine | |
170 | * its offset in the current block. | |
171 | */ | |
172 | ||
173 | offsetof(off) | |
174 | off_t off; | |
175 | { | |
176 | off_t a; | |
177 | ||
178 | a = off & 0777; | |
179 | return((int) a); | |
180 | } | |
181 | ||
182 | /* | |
183 | * Determine if the passed file is actually a tty, via a call to | |
184 | * gtty. This is not totally reliable, but . . . | |
185 | */ | |
186 | ||
187 | isatty(f) | |
188 | { | |
189 | struct sgttyb buf; | |
190 | ||
191 | if (gtty(f, &buf) < 0) | |
192 | return(0); | |
193 | return(1); | |
194 | } | |
195 | ||
196 | /* | |
197 | * Return the desired header line from the passed message | |
198 | * pointer (or NOSTR if the desired header field is not available). | |
199 | */ | |
200 | ||
201 | char * | |
202 | hfield(field, mp) | |
203 | char field[]; | |
204 | struct message *mp; | |
205 | { | |
206 | register FILE *ibuf; | |
207 | char linebuf[LINESIZE]; | |
208 | register int lc; | |
209 | ||
210 | ibuf = setinput(mp); | |
211 | if ((lc = mp->m_lines) <= 0) | |
212 | return(NOSTR); | |
213 | if (readline(ibuf, linebuf) < 0) | |
214 | return(NOSTR); | |
215 | lc--; | |
216 | do { | |
217 | lc = gethfield(ibuf, linebuf, lc); | |
218 | if (lc == -1) | |
219 | return(NOSTR); | |
220 | if (ishfield(linebuf, field)) | |
221 | return(savestr(hcontents(linebuf))); | |
222 | } while (lc > 0); | |
223 | return(NOSTR); | |
224 | } | |
225 | ||
226 | /* | |
227 | * Return the next header field found in the given message. | |
228 | * Return > 0 if something found, <= 0 elsewise. | |
229 | * Must deal with \ continuations & other such fraud. | |
230 | */ | |
231 | ||
232 | gethfield(f, linebuf, rem) | |
233 | register FILE *f; | |
234 | char linebuf[]; | |
235 | register int rem; | |
236 | { | |
237 | char line2[LINESIZE]; | |
238 | long loc; | |
239 | register char *cp, *cp2; | |
240 | register int c; | |
241 | ||
242 | ||
243 | for (;;) { | |
244 | if (rem <= 0) | |
245 | return(-1); | |
246 | if (readline(f, linebuf) < 0) | |
247 | return(-1); | |
248 | rem--; | |
249 | if (strlen(linebuf) == 0) | |
250 | return(-1); | |
251 | if (isspace(linebuf[0])) | |
252 | continue; | |
253 | if (linebuf[0] == '>') | |
254 | continue; | |
255 | cp = index(linebuf, ':'); | |
256 | if (cp == NOSTR) | |
257 | continue; | |
258 | for (cp2 = linebuf; cp2 < cp; cp2++) | |
259 | if (isdigit(*cp2)) | |
260 | continue; | |
261 | ||
262 | /* | |
263 | * I guess we got a headline. | |
264 | * Handle wraparounding | |
265 | */ | |
266 | ||
267 | for (;;) { | |
268 | if (rem <= 0) | |
269 | break; | |
270 | #ifdef CANTELL | |
271 | loc = ftell(f); | |
272 | if (readline(f, line2) < 0) | |
273 | break; | |
274 | rem--; | |
275 | if (!isspace(line2[0])) { | |
276 | fseek(f, loc, 0); | |
277 | rem++; | |
278 | break; | |
279 | } | |
280 | #else | |
281 | c = getc(f); | |
282 | ungetc(c, f); | |
283 | if (!isspace(c) || c == '\n') | |
284 | break; | |
285 | if (readline(f, line2) < 0) | |
286 | break; | |
287 | rem--; | |
288 | #endif | |
289 | cp2 = line2; | |
290 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
291 | ; | |
292 | if (strlen(linebuf) + strlen(cp2) >= LINESIZE-2) | |
293 | break; | |
294 | cp = &linebuf[strlen(linebuf)]; | |
295 | while (cp > linebuf && | |
296 | (isspace(cp[-1]) || cp[-1] == '\\')) | |
297 | cp--; | |
298 | *cp++ = ' '; | |
299 | for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++) | |
300 | ; | |
301 | strcpy(cp, cp2); | |
302 | } | |
303 | if ((c = strlen(linebuf)) > 0) { | |
304 | cp = &linebuf[c-1]; | |
305 | while (cp > linebuf && isspace(*cp)) | |
306 | cp--; | |
307 | *++cp = 0; | |
308 | } | |
309 | return(rem); | |
310 | } | |
311 | /* NOTREACHED */ | |
312 | } | |
313 | ||
314 | /* | |
315 | * Check whether the passed line is a header line of | |
316 | * the desired breed. | |
317 | */ | |
318 | ||
319 | ishfield(linebuf, field) | |
320 | char linebuf[], field[]; | |
321 | { | |
322 | register char *cp; | |
323 | register int c; | |
324 | ||
325 | if ((cp = index(linebuf, ':')) == NOSTR) | |
326 | return(0); | |
327 | if (cp == linebuf) | |
328 | return(0); | |
329 | cp--; | |
330 | while (cp > linebuf && isspace(*cp)) | |
331 | cp--; | |
332 | c = *++cp; | |
333 | *cp = 0; | |
334 | if (icequal(linebuf ,field)) { | |
335 | *cp = c; | |
336 | return(1); | |
337 | } | |
338 | *cp = c; | |
339 | return(0); | |
340 | } | |
341 | ||
342 | /* | |
343 | * Extract the non label information from the given header field | |
344 | * and return it. | |
345 | */ | |
346 | ||
347 | char * | |
348 | hcontents(hfield) | |
349 | char hfield[]; | |
350 | { | |
351 | register char *cp; | |
352 | ||
353 | if ((cp = index(hfield, ':')) == NOSTR) | |
354 | return(NOSTR); | |
355 | cp++; | |
356 | while (*cp && isspace(*cp)) | |
357 | cp++; | |
358 | return(cp); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Compare two strings, ignoring case. | |
363 | */ | |
364 | ||
365 | icequal(s1, s2) | |
366 | register char *s1, *s2; | |
367 | { | |
368 | ||
369 | while (raise(*s1++) == raise(*s2)) | |
370 | if (*s2++ == 0) | |
371 | return(1); | |
372 | return(0); | |
373 | } | |
374 | ||
da0d3a6d KS |
375 | /* |
376 | * Copy a string, lowercasing it as we go. | |
377 | */ | |
378 | istrcpy(dest, src) | |
379 | char *dest, *src; | |
380 | { | |
381 | register char *cp, *cp2; | |
382 | ||
383 | cp2 = dest; | |
384 | cp = src; | |
385 | do { | |
386 | *cp2++ = little(*cp); | |
387 | } while (*cp++ != 0); | |
388 | } | |
389 | ||
6447a23f KS |
390 | /* |
391 | * The following code deals with input stacking to do source | |
392 | * commands. All but the current file pointer are saved on | |
393 | * the stack. | |
394 | */ | |
395 | ||
396 | static int ssp = -1; /* Top of file stack */ | |
e48b42f1 KS |
397 | struct sstack { |
398 | FILE *s_file; /* File we were in. */ | |
399 | int s_cond; /* Saved state of conditionals */ | |
f4aa38b5 | 400 | int s_loading; /* Loading .mailrc, etc. */ |
e48b42f1 | 401 | } sstack[_NFILE]; |
6447a23f KS |
402 | |
403 | /* | |
404 | * Pushdown current input file and switch to a new one. | |
405 | * Set the global flag "sourcing" so that others will realize | |
406 | * that they are no longer reading from a tty (in all probability). | |
407 | */ | |
408 | ||
409 | source(name) | |
410 | char name[]; | |
411 | { | |
412 | register FILE *fi; | |
5c7ba847 | 413 | register char *cp; |
6447a23f | 414 | |
5c7ba847 KS |
415 | if ((cp = expand(name)) == NOSTR) |
416 | return(1); | |
417 | if ((fi = fopen(cp, "r")) == NULL) { | |
418 | perror(cp); | |
6447a23f KS |
419 | return(1); |
420 | } | |
421 | if (ssp >= _NFILE-2) { | |
422 | printf("Too much \"sourcing\" going on.\n"); | |
423 | fclose(fi); | |
424 | return(1); | |
425 | } | |
e48b42f1 KS |
426 | sstack[++ssp].s_file = input; |
427 | sstack[ssp].s_cond = cond; | |
f4aa38b5 KS |
428 | sstack[ssp].s_loading = loading; |
429 | loading = 0; | |
e48b42f1 | 430 | cond = CANY; |
6447a23f KS |
431 | input = fi; |
432 | sourcing++; | |
433 | return(0); | |
434 | } | |
435 | ||
436 | /* | |
437 | * Source a file, but do nothing if the file cannot be opened. | |
438 | */ | |
439 | ||
440 | source1(name) | |
441 | char name[]; | |
442 | { | |
443 | register int f; | |
444 | ||
445 | if ((f = open(name, 0)) < 0) | |
446 | return(0); | |
447 | close(f); | |
448 | source(name); | |
449 | } | |
450 | ||
451 | /* | |
452 | * Pop the current input back to the previous level. | |
453 | * Update the "sourcing" flag as appropriate. | |
454 | */ | |
455 | ||
456 | unstack() | |
457 | { | |
458 | if (ssp < 0) { | |
459 | printf("\"Source\" stack over-pop.\n"); | |
460 | sourcing = 0; | |
461 | return(1); | |
462 | } | |
463 | fclose(input); | |
e48b42f1 KS |
464 | if (cond != CANY) |
465 | printf("Unmatched \"if\"\n"); | |
466 | cond = sstack[ssp].s_cond; | |
f4aa38b5 | 467 | loading = sstack[ssp].s_loading; |
e48b42f1 | 468 | input = sstack[ssp--].s_file; |
6447a23f | 469 | if (ssp < 0) |
f4aa38b5 | 470 | sourcing = loading; |
6447a23f KS |
471 | return(0); |
472 | } | |
473 | ||
474 | /* | |
475 | * Touch the indicated file. | |
476 | * This is nifty for the shell. | |
477 | * If we have the utime() system call, this is better served | |
478 | * by using that, since it will work for empty files. | |
479 | * On non-utime systems, we must sleep a second, then read. | |
480 | */ | |
481 | ||
482 | alter(name) | |
483 | char name[]; | |
484 | { | |
485 | #ifdef UTIME | |
486 | struct stat statb; | |
487 | long time(); | |
488 | time_t time_p[2]; | |
489 | #else | |
490 | register int pid, f; | |
491 | char w; | |
492 | #endif UTIME | |
493 | ||
494 | #ifdef UTIME | |
495 | if (stat(name, &statb) < 0) | |
496 | return; | |
497 | time_p[0] = time((long *) 0) + 1; | |
498 | time_p[1] = statb.st_mtime; | |
499 | utime(name, time_p); | |
500 | #else | |
6447a23f KS |
501 | sleep(1); |
502 | if ((f = open(name, 0)) < 0) | |
a0852086 | 503 | return; |
6447a23f KS |
504 | read(f, &w, 1); |
505 | exit(0); | |
506 | #endif | |
507 | } | |
508 | ||
509 | /* | |
510 | * Examine the passed line buffer and | |
511 | * return true if it is all blanks and tabs. | |
512 | */ | |
513 | ||
514 | blankline(linebuf) | |
515 | char linebuf[]; | |
516 | { | |
517 | register char *cp; | |
518 | ||
519 | for (cp = linebuf; *cp; cp++) | |
520 | if (!any(*cp, " \t")) | |
521 | return(0); | |
522 | return(1); | |
523 | } | |
524 | ||
12388009 KS |
525 | /* |
526 | * Get sender's name from this message. If the message has | |
527 | * a bunch of arpanet stuff in it, we may have to skin the name | |
528 | * before returning it. | |
529 | */ | |
530 | char * | |
531 | nameof(mp, reptype) | |
532 | register struct message *mp; | |
533 | { | |
8bcfa450 | 534 | register char *cp, *cp2; |
12388009 | 535 | |
8bcfa450 KS |
536 | cp = skin(name1(mp, reptype)); |
537 | if (reptype != 0 || charcount(cp, '!') < 2) | |
538 | return(cp); | |
539 | cp2 = rindex(cp, '!'); | |
540 | cp2--; | |
541 | while (cp2 > cp && *cp2 != '!') | |
542 | cp2--; | |
543 | if (*cp2 == '!') | |
544 | return(cp2 + 1); | |
545 | return(cp); | |
12388009 KS |
546 | } |
547 | ||
548 | /* | |
549 | * Skin an arpa net address according to the RFC 733 interpretation | |
550 | * of "host-phrase." | |
551 | */ | |
552 | char * | |
553 | skin(name) | |
554 | char *name; | |
555 | { | |
556 | register int c; | |
557 | register char *cp, *cp2; | |
558 | int gotlt, lastsp; | |
559 | char nbuf[BUFSIZ]; | |
560 | ||
561 | if (name == NOSTR) | |
562 | return(NOSTR); | |
563 | if (index(name, '(') == NOSTR && index(name, '<') == NOSTR) | |
564 | return(name); | |
565 | gotlt = 0; | |
566 | lastsp = 0; | |
567 | for (cp = name, cp2 = nbuf, c = *cp++; *cp; c = *cp++) { | |
568 | switch (c) { | |
569 | case '(': | |
570 | while (*cp != ')' && *cp != 0) | |
571 | cp++; | |
572 | if (*cp) | |
573 | cp++; | |
574 | break; | |
575 | ||
576 | case ' ': | |
577 | lastsp = 1; | |
578 | break; | |
579 | ||
580 | case '<': | |
581 | cp2 = nbuf; | |
582 | gotlt++; | |
583 | lastsp = 0; | |
584 | break; | |
585 | ||
586 | case '>': | |
587 | if (gotlt) | |
588 | goto done; | |
589 | ||
590 | /* Fall into . . . */ | |
591 | ||
592 | default: | |
593 | if (lastsp) { | |
594 | lastsp = 0; | |
595 | *cp2++ = ' '; | |
596 | } | |
597 | *cp2++ = c; | |
598 | break; | |
599 | } | |
600 | } | |
601 | done: | |
602 | *cp2 = 0; | |
603 | ||
604 | return(savestr(nbuf)); | |
605 | } | |
606 | ||
6447a23f KS |
607 | /* |
608 | * Fetch the sender's name from the passed message. | |
12388009 KS |
609 | * Reptype can be |
610 | * 0 -- get sender's name for display purposes | |
611 | * 1 -- get sender's name for reply | |
612 | * 2 -- get sender's name for Reply | |
6447a23f KS |
613 | */ |
614 | ||
615 | char * | |
12388009 | 616 | name1(mp, reptype) |
6447a23f KS |
617 | register struct message *mp; |
618 | { | |
619 | char namebuf[LINESIZE]; | |
620 | char linebuf[LINESIZE]; | |
621 | register char *cp, *cp2; | |
622 | register FILE *ibuf; | |
623 | int first = 1; | |
624 | ||
12388009 KS |
625 | #ifndef DELIVERMAIL |
626 | if ((cp = hfield("from", mp)) != NOSTR) | |
627 | return(cp); | |
628 | if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR) | |
629 | return(cp); | |
630 | #endif | |
6447a23f KS |
631 | ibuf = setinput(mp); |
632 | copy("", namebuf); | |
633 | if (readline(ibuf, linebuf) <= 0) | |
634 | return(savestr(namebuf)); | |
635 | newname: | |
636 | for (cp = linebuf; *cp != ' '; cp++) | |
637 | ; | |
638 | while (any(*cp, " \t")) | |
639 | cp++; | |
640 | for (cp2 = &namebuf[strlen(namebuf)]; *cp && !any(*cp, " \t") && | |
641 | cp2-namebuf < LINESIZE-1; *cp2++ = *cp++) | |
642 | ; | |
643 | *cp2 = '\0'; | |
644 | if (readline(ibuf, linebuf) <= 0) | |
645 | return(savestr(namebuf)); | |
646 | if ((cp = index(linebuf, 'F')) == NULL) | |
647 | return(savestr(namebuf)); | |
648 | if (strncmp(cp, "From", 4) != 0) | |
649 | return(savestr(namebuf)); | |
650 | while ((cp = index(cp, 'r')) != NULL) { | |
651 | if (strncmp(cp, "remote", 6) == 0) { | |
652 | if ((cp = index(cp, 'f')) == NULL) | |
653 | break; | |
654 | if (strncmp(cp, "from", 4) != 0) | |
655 | break; | |
656 | if ((cp = index(cp, ' ')) == NULL) | |
657 | break; | |
658 | cp++; | |
659 | if (first) { | |
660 | copy(cp, namebuf); | |
661 | first = 0; | |
662 | } else | |
663 | strcpy(rindex(namebuf, '!')+1, cp); | |
664 | strcat(namebuf, "!"); | |
665 | goto newname; | |
666 | } | |
667 | cp++; | |
668 | } | |
669 | return(savestr(namebuf)); | |
670 | } | |
671 | ||
8bcfa450 KS |
672 | /* |
673 | * Count the occurances of c in str | |
674 | */ | |
675 | charcount(str, c) | |
676 | char *str; | |
677 | { | |
678 | register char *cp; | |
679 | register int i; | |
680 | ||
681 | for (i = 0, cp = str; *cp; cp++) | |
682 | if (*cp == c) | |
683 | i++; | |
684 | return(i); | |
685 | } | |
686 | ||
6447a23f KS |
687 | /* |
688 | * Find the rightmost pointer to an instance of the | |
689 | * character in the string and return it. | |
690 | */ | |
6447a23f KS |
691 | char * |
692 | rindex(str, c) | |
693 | char str[]; | |
694 | register int c; | |
695 | { | |
696 | register char *cp, *cp2; | |
697 | ||
698 | for (cp = str, cp2 = NOSTR; *cp; cp++) | |
699 | if (c == *cp) | |
700 | cp2 = cp; | |
701 | return(cp2); | |
702 | } | |
703 | ||
704 | /* | |
705 | * See if the string is a number. | |
706 | */ | |
707 | ||
708 | numeric(str) | |
709 | char str[]; | |
710 | { | |
711 | register char *cp = str; | |
712 | ||
713 | while (*cp) | |
714 | if (!isdigit(*cp++)) | |
715 | return(0); | |
716 | return(1); | |
717 | } | |
718 | ||
719 | /* | |
720 | * Are any of the characters in the two strings the same? | |
721 | */ | |
722 | ||
723 | anyof(s1, s2) | |
724 | register char *s1, *s2; | |
725 | { | |
726 | register int c; | |
727 | ||
728 | while (c = *s1++) | |
729 | if (any(c, s2)) | |
730 | return(1); | |
731 | return(0); | |
732 | } | |
733 | ||
734 | /* | |
735 | * Determine the leftmost index of the character | |
736 | * in the string. | |
737 | */ | |
738 | ||
739 | char * | |
740 | index(str, ch) | |
741 | char *str; | |
742 | { | |
743 | register char *cp; | |
744 | register int c; | |
745 | ||
746 | for (c = ch, cp = str; *cp; cp++) | |
747 | if (*cp == c) | |
748 | return(cp); | |
749 | return(NOSTR); | |
750 | } | |
751 | ||
752 | /* | |
753 | * String compare two strings of bounded length. | |
754 | */ | |
755 | ||
756 | strncmp(as1, as2, an) | |
757 | char *as1, *as2; | |
758 | { | |
759 | register char *s1, *s2; | |
760 | register int n; | |
761 | ||
762 | s1 = as1; | |
763 | s2 = as2; | |
764 | n = an; | |
765 | while (--n >= 0 && *s1 == *s2++) | |
766 | if (*s1++ == '\0') | |
767 | return(0); | |
768 | return(n<0 ? 0 : *s1 - *--s2); | |
769 | } | |
770 | ||
713a0bca KS |
771 | #ifndef SIGRETRO |
772 | ||
773 | /* | |
774 | * This routine is used by the sigretro package to | |
775 | * reset held signals to ignored signals. If you're not | |
776 | * using sigretro, you don't need to do anything, but you DO | |
777 | * need this stub to keep everyone happy. | |
778 | */ | |
779 | sigchild() {} | |
780 | ||
781 | #endif SIGRETRO | |
da0d3a6d KS |
782 | |
783 | /* | |
784 | * See if the given header field is supposed to be ignored. | |
785 | */ | |
786 | isign(field) | |
787 | char *field; | |
788 | { | |
789 | char realfld[BUFSIZ]; | |
790 | register int h; | |
791 | register struct ignore *igp; | |
792 | ||
793 | istrcpy(realfld, field); | |
794 | h = hash(realfld); | |
795 | for (igp = ignore[h]; igp != 0; igp = igp->i_link) | |
796 | if (strcmp(igp->i_field, realfld) == 0) | |
797 | return(1); | |
798 | return(0); | |
799 | } |