| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char *sccsid = "@(#)aux.c 5.4 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "rcv.h" |
| 12 | #include <sys/stat.h> |
| 13 | #include <ctype.h> |
| 14 | |
| 15 | /* |
| 16 | * Mail -- a mail program |
| 17 | * |
| 18 | * Auxiliary functions. |
| 19 | */ |
| 20 | |
| 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 | { |
| 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; |
| 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 | |
| 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 | * 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 | |
| 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 | |
| 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 */ |
| 375 | struct sstack { |
| 376 | FILE *s_file; /* File we were in. */ |
| 377 | int s_cond; /* Saved state of conditionals */ |
| 378 | int s_loading; /* Loading .mailrc, etc. */ |
| 379 | } sstack[NOFILE]; |
| 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; |
| 391 | register char *cp; |
| 392 | |
| 393 | if ((cp = expand(name)) == NOSTR) |
| 394 | return(1); |
| 395 | if ((fi = fopen(cp, "r")) == NULL) { |
| 396 | perror(cp); |
| 397 | return(1); |
| 398 | } |
| 399 | if (ssp >= NOFILE - 2) { |
| 400 | printf("Too much \"sourcing\" going on.\n"); |
| 401 | fclose(fi); |
| 402 | return(1); |
| 403 | } |
| 404 | sstack[++ssp].s_file = input; |
| 405 | sstack[ssp].s_cond = cond; |
| 406 | sstack[ssp].s_loading = loading; |
| 407 | loading = 0; |
| 408 | cond = CANY; |
| 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); |
| 442 | if (cond != CANY) |
| 443 | printf("Unmatched \"if\"\n"); |
| 444 | cond = sstack[ssp].s_cond; |
| 445 | loading = sstack[ssp].s_loading; |
| 446 | input = sstack[ssp--].s_file; |
| 447 | if (ssp < 0) |
| 448 | sourcing = loading; |
| 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 |
| 479 | sleep(1); |
| 480 | if ((f = open(name, 0)) < 0) |
| 481 | return; |
| 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++) |
| 498 | if (*cp != ' ' && *cp != '\t') |
| 499 | return(0); |
| 500 | return(1); |
| 501 | } |
| 502 | |
| 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 | { |
| 512 | register char *cp, *cp2; |
| 513 | |
| 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); |
| 524 | } |
| 525 | |
| 526 | /* |
| 527 | * Skin an arpa net address according to the RFC 822 interpretation |
| 528 | * of "host-phrase." |
| 529 | */ |
| 530 | char * |
| 531 | skin(name) |
| 532 | char *name; |
| 533 | { |
| 534 | register int c; |
| 535 | register char *cp, *cp2; |
| 536 | char *bufend; |
| 537 | int gotlt, lastsp; |
| 538 | char nbuf[BUFSIZ]; |
| 539 | int nesting; |
| 540 | |
| 541 | if (name == NOSTR) |
| 542 | return(NOSTR); |
| 543 | if (index(name, '(') == NOSTR && index(name, '<') == NOSTR |
| 544 | && index(name, ' ') == NOSTR) |
| 545 | return(name); |
| 546 | gotlt = 0; |
| 547 | lastsp = 0; |
| 548 | bufend = nbuf; |
| 549 | for (cp = name, cp2 = bufend; c = *cp++; ) { |
| 550 | switch (c) { |
| 551 | case '(': |
| 552 | /* |
| 553 | * Start of a "comment". |
| 554 | * Ignore it. |
| 555 | */ |
| 556 | nesting = 1; |
| 557 | while ((c = *cp) != 0) { |
| 558 | cp++; |
| 559 | switch (c) { |
| 560 | case '\\': |
| 561 | if (*cp == 0) |
| 562 | goto outcm; |
| 563 | cp++; |
| 564 | break; |
| 565 | case '(': |
| 566 | nesting++; |
| 567 | break; |
| 568 | |
| 569 | case ')': |
| 570 | --nesting; |
| 571 | break; |
| 572 | } |
| 573 | |
| 574 | if (nesting <= 0) |
| 575 | break; |
| 576 | } |
| 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: |
| 600 | lastsp = 0; |
| 601 | break; |
| 602 | |
| 603 | case ' ': |
| 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; |
| 611 | break; |
| 612 | |
| 613 | case '<': |
| 614 | cp2 = bufend; |
| 615 | gotlt++; |
| 616 | lastsp = 0; |
| 617 | break; |
| 618 | |
| 619 | case '>': |
| 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 | } |
| 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 | |
| 649 | /* |
| 650 | * Fetch the sender's name from the passed message. |
| 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 |
| 655 | */ |
| 656 | |
| 657 | char * |
| 658 | name1(mp, reptype) |
| 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 | |
| 667 | if ((cp = hfield("from", mp)) != NOSTR) |
| 668 | return(cp); |
| 669 | if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR) |
| 670 | return(cp); |
| 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 | |
| 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 | |
| 727 | /* |
| 728 | * Find the rightmost pointer to an instance of the |
| 729 | * character in the string and return it. |
| 730 | */ |
| 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 | |
| 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]; |
| 799 | |
| 800 | /* |
| 801 | * Lower-case the string, so that "Status" and "status" |
| 802 | * will hash to the same place. |
| 803 | */ |
| 804 | istrcpy(realfld, field); |
| 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); |
| 823 | } |