1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)headers.c 6.12 (Berkeley) 02/24/93"; 11 #endif /* not lint */ 12 13 # include <errno.h> 14 # include "sendmail.h" 15 16 /* 17 ** CHOMPHEADER -- process and save a header line. 18 ** 19 ** Called by collect and by readcf to deal with header lines. 20 ** 21 ** Parameters: 22 ** line -- header as a text line. 23 ** def -- if set, this is a default value. 24 ** e -- the envelope including this header. 25 ** 26 ** Returns: 27 ** flags for this header. 28 ** 29 ** Side Effects: 30 ** The header is saved on the header list. 31 ** Contents of 'line' are destroyed. 32 */ 33 34 chompheader(line, def, e) 35 char *line; 36 bool def; 37 register ENVELOPE *e; 38 { 39 register char *p; 40 register HDR *h; 41 HDR **hp; 42 char *fname; 43 char *fvalue; 44 struct hdrinfo *hi; 45 bool cond = FALSE; 46 BITMAP mopts; 47 48 if (tTd(31, 6)) 49 printf("chompheader: %s\n", line); 50 51 /* strip off options */ 52 clrbitmap(mopts); 53 p = line; 54 if (*p == '?') 55 { 56 /* have some */ 57 register char *q = strchr(p + 1, *p); 58 59 if (q != NULL) 60 { 61 *q++ = '\0'; 62 while (*++p != '\0') 63 setbitn(*p, mopts); 64 p = q; 65 } 66 else 67 usrerr("553 header syntax error, line \"%s\"", line); 68 cond = TRUE; 69 } 70 71 /* find canonical name */ 72 fname = p; 73 p = strchr(p, ':'); 74 if (p == NULL) 75 { 76 syserr("553 header syntax error, line \"%s\"", line); 77 return (0); 78 } 79 fvalue = &p[1]; 80 while (isascii(*--p) && isspace(*p)) 81 continue; 82 *++p = '\0'; 83 makelower(fname); 84 85 /* strip field value on front */ 86 if (*fvalue == ' ') 87 fvalue++; 88 89 /* see if it is a known type */ 90 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 91 { 92 if (strcmp(hi->hi_field, fname) == 0) 93 break; 94 } 95 96 /* see if this is a resent message */ 97 if (!def && bitset(H_RESENT, hi->hi_flags)) 98 e->e_flags |= EF_RESENT; 99 100 /* if this means "end of header" quit now */ 101 if (bitset(H_EOH, hi->hi_flags)) 102 return (hi->hi_flags); 103 104 /* drop explicit From: if same as what we would generate -- for MH */ 105 p = "resent-from"; 106 if (!bitset(EF_RESENT, e->e_flags)) 107 p += 7; 108 if (!def && !QueueRun && strcmp(fname, p) == 0) 109 { 110 if (e->e_from.q_paddr != NULL && 111 strcmp(fvalue, e->e_from.q_paddr) == 0) 112 return (hi->hi_flags); 113 } 114 115 /* delete default value for this header */ 116 for (hp = &e->e_header; (h = *hp) != NULL; hp = &h->h_link) 117 { 118 if (strcmp(fname, h->h_field) == 0 && 119 bitset(H_DEFAULT, h->h_flags) && 120 !bitset(H_FORCE, h->h_flags)) 121 h->h_value = NULL; 122 } 123 124 /* create a new node */ 125 h = (HDR *) xalloc(sizeof *h); 126 h->h_field = newstr(fname); 127 h->h_value = NULL; 128 h->h_link = NULL; 129 bcopy((char *) mopts, (char *) h->h_mflags, sizeof mopts); 130 *hp = h; 131 h->h_flags = hi->hi_flags; 132 if (def) 133 h->h_flags |= H_DEFAULT; 134 if (cond) 135 h->h_flags |= H_CHECK; 136 if (h->h_value != NULL) 137 free((char *) h->h_value); 138 h->h_value = newstr(fvalue); 139 140 /* hack to see if this is a new format message */ 141 if (!def && bitset(H_RCPT|H_FROM, h->h_flags) && 142 (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL || 143 strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL)) 144 { 145 e->e_flags &= ~EF_OLDSTYLE; 146 } 147 148 return (h->h_flags); 149 } 150 /* 151 ** ADDHEADER -- add a header entry to the end of the queue. 152 ** 153 ** This bypasses the special checking of chompheader. 154 ** 155 ** Parameters: 156 ** field -- the name of the header field. 157 ** value -- the value of the field. It must be lower-cased. 158 ** e -- the envelope to add them to. 159 ** 160 ** Returns: 161 ** none. 162 ** 163 ** Side Effects: 164 ** adds the field on the list of headers for this envelope. 165 */ 166 167 addheader(field, value, e) 168 char *field; 169 char *value; 170 ENVELOPE *e; 171 { 172 register HDR *h; 173 register struct hdrinfo *hi; 174 HDR **hp; 175 176 /* find info struct */ 177 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 178 { 179 if (strcmp(field, hi->hi_field) == 0) 180 break; 181 } 182 183 /* find current place in list -- keep back pointer? */ 184 for (hp = &e->e_header; (h = *hp) != NULL; hp = &h->h_link) 185 { 186 if (strcmp(field, h->h_field) == 0) 187 break; 188 } 189 190 /* allocate space for new header */ 191 h = (HDR *) xalloc(sizeof *h); 192 h->h_field = field; 193 h->h_value = newstr(value); 194 h->h_link = *hp; 195 h->h_flags = hi->hi_flags | H_DEFAULT; 196 clrbitmap(h->h_mflags); 197 *hp = h; 198 } 199 /* 200 ** HVALUE -- return value of a header. 201 ** 202 ** Only "real" fields (i.e., ones that have not been supplied 203 ** as a default) are used. 204 ** 205 ** Parameters: 206 ** field -- the field name. 207 ** e -- the envelope containing the header. 208 ** 209 ** Returns: 210 ** pointer to the value part. 211 ** NULL if not found. 212 ** 213 ** Side Effects: 214 ** none. 215 */ 216 217 char * 218 hvalue(field, e) 219 char *field; 220 register ENVELOPE *e; 221 { 222 register HDR *h; 223 224 for (h = e->e_header; h != NULL; h = h->h_link) 225 { 226 if (!bitset(H_DEFAULT, h->h_flags) && strcmp(h->h_field, field) == 0) 227 return (h->h_value); 228 } 229 return (NULL); 230 } 231 /* 232 ** ISHEADER -- predicate telling if argument is a header. 233 ** 234 ** A line is a header if it has a single word followed by 235 ** optional white space followed by a colon. 236 ** 237 ** Parameters: 238 ** s -- string to check for possible headerness. 239 ** 240 ** Returns: 241 ** TRUE if s is a header. 242 ** FALSE otherwise. 243 ** 244 ** Side Effects: 245 ** none. 246 */ 247 248 bool 249 isheader(s) 250 register char *s; 251 { 252 while (*s > ' ' && *s != ':' && *s != '\0') 253 s++; 254 255 /* following technically violates RFC822 */ 256 while (isascii(*s) && isspace(*s)) 257 s++; 258 259 return (*s == ':'); 260 } 261 /* 262 ** EATHEADER -- run through the stored header and extract info. 263 ** 264 ** Parameters: 265 ** e -- the envelope to process. 266 ** queuejob -- set if running a queued job. 267 ** 268 ** Returns: 269 ** none. 270 ** 271 ** Side Effects: 272 ** Sets a bunch of global variables from information 273 ** in the collected header. 274 ** Aborts the message if the hop count is exceeded. 275 */ 276 277 eatheader(e, queuejob) 278 register ENVELOPE *e; 279 bool queuejob; 280 { 281 register HDR *h; 282 register char *p; 283 int hopcnt = 0; 284 char *msgid; 285 char msgidbuf[MAXNAME]; 286 287 if (tTd(32, 1)) 288 printf("----- collected header -----\n"); 289 msgid = "<none>"; 290 for (h = e->e_header; h != NULL; h = h->h_link) 291 { 292 extern char *capitalize(); 293 294 if (tTd(32, 1)) 295 printf("%s: %s\n", capitalize(h->h_field), h->h_value); 296 297 /* count the number of times it has been processed */ 298 if (bitset(H_TRACE, h->h_flags)) 299 hopcnt++; 300 301 /* send to this person if we so desire */ 302 if (GrabTo && bitset(H_RCPT, h->h_flags) && 303 !bitset(H_DEFAULT, h->h_flags) && 304 (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) 305 { 306 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 307 &e->e_sendqueue, e); 308 } 309 310 /* save the message-id for logging */ 311 if (!queuejob && h->h_value != NULL && 312 strcmp(h->h_field, "message-id") == 0) 313 { 314 msgid = h->h_value; 315 if (bitset(H_DEFAULT, h->h_flags)) 316 { 317 expand(msgid, msgidbuf, 318 &msgidbuf[sizeof msgidbuf], e); 319 msgid = msgidbuf; 320 } 321 } 322 323 /* see if this is a return-receipt header */ 324 if (bitset(H_RECEIPTTO, h->h_flags)) 325 e->e_receiptto = h->h_value; 326 327 /* see if this is an errors-to header */ 328 if (bitset(H_ERRORSTO, h->h_flags)) 329 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 330 &e->e_errorqueue, e); 331 } 332 if (tTd(32, 1)) 333 printf("----------------------------\n"); 334 335 /* if we are just verifying (that is, sendmail -t -bv), drop out now */ 336 if (OpMode == MD_VERIFY) 337 return; 338 339 /* store hop count */ 340 if (hopcnt > e->e_hopcount) 341 e->e_hopcount = hopcnt; 342 343 /* message priority */ 344 p = hvalue("precedence", e); 345 if (p != NULL) 346 e->e_class = priencode(p); 347 if (!queuejob) 348 e->e_msgpriority = e->e_msgsize 349 - e->e_class * WkClassFact 350 + e->e_nrcpts * WkRecipFact; 351 352 /* full name of from person */ 353 p = hvalue("full-name", e); 354 if (p != NULL) 355 define('x', p, e); 356 357 /* date message originated */ 358 p = hvalue("posted-date", e); 359 if (p == NULL) 360 p = hvalue("date", e); 361 if (p != NULL) 362 define('a', p, e); 363 364 /* 365 ** Log collection information. 366 */ 367 368 # ifdef LOG 369 if (!queuejob && LogLevel > 4) 370 { 371 char *name; 372 char hbuf[MAXNAME]; 373 char sbuf[MAXLINE]; 374 375 if (RealHostName == NULL) 376 name = "local"; 377 else if (RealHostName[0] == '[') 378 name = RealHostName; 379 else 380 { 381 extern char *inet_ntoa(); 382 383 name = hbuf; 384 (void)sprintf(hbuf, "%.80s (%s)", 385 RealHostName, inet_ntoa(RealHostAddr.sin_addr)); 386 } 387 388 /* some versions of syslog only take 5 printf args */ 389 sprintf(sbuf, "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d, msgid=%.100s", 390 e->e_from.q_paddr, e->e_msgsize, e->e_class, 391 e->e_msgpriority, e->e_nrcpts, msgid); 392 syslog(LOG_INFO, "%s: %s, received from %s", 393 e->e_id, sbuf, name); 394 } 395 # endif /* LOG */ 396 } 397 /* 398 ** PRIENCODE -- encode external priority names into internal values. 399 ** 400 ** Parameters: 401 ** p -- priority in ascii. 402 ** 403 ** Returns: 404 ** priority as a numeric level. 405 ** 406 ** Side Effects: 407 ** none. 408 */ 409 410 priencode(p) 411 char *p; 412 { 413 register int i; 414 415 for (i = 0; i < NumPriorities; i++) 416 { 417 if (!strcasecmp(p, Priorities[i].pri_name)) 418 return (Priorities[i].pri_val); 419 } 420 421 /* unknown priority */ 422 return (0); 423 } 424 /* 425 ** CRACKADDR -- parse an address and turn it into a macro 426 ** 427 ** This doesn't actually parse the address -- it just extracts 428 ** it and replaces it with "$g". The parse is totally ad hoc 429 ** and isn't even guaranteed to leave something syntactically 430 ** identical to what it started with. However, it does leave 431 ** something semantically identical. 432 ** 433 ** This algorithm has been cleaned up to handle a wider range 434 ** of cases -- notably quoted and backslash escaped strings. 435 ** This modification makes it substantially better at preserving 436 ** the original syntax. 437 ** 438 ** Parameters: 439 ** addr -- the address to be cracked. 440 ** 441 ** Returns: 442 ** a pointer to the new version. 443 ** 444 ** Side Effects: 445 ** none. 446 ** 447 ** Warning: 448 ** The return value is saved in local storage and should 449 ** be copied if it is to be reused. 450 */ 451 452 char * 453 crackaddr(addr) 454 register char *addr; 455 { 456 register char *p; 457 register char c; 458 int cmtlev; 459 int realcmtlev; 460 int anglelev, realanglelev; 461 int copylev; 462 bool qmode; 463 bool realqmode; 464 bool skipping; 465 bool putgmac = FALSE; 466 bool quoteit = FALSE; 467 register char *bp; 468 char *buflim; 469 static char buf[MAXNAME]; 470 471 if (tTd(33, 1)) 472 printf("crackaddr(%s)\n", addr); 473 474 /* strip leading spaces */ 475 while (*addr != '\0' && isascii(*addr) && isspace(*addr)) 476 addr++; 477 478 /* 479 ** Start by assuming we have no angle brackets. This will be 480 ** adjusted later if we find them. 481 */ 482 483 bp = buf; 484 buflim = &buf[sizeof buf - 5]; 485 p = addr; 486 copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; 487 qmode = realqmode = FALSE; 488 489 while ((c = *p++) != '\0') 490 { 491 /* 492 ** If the buffer is overful, go into a special "skipping" 493 ** mode that tries to keep legal syntax but doesn't actually 494 ** output things. 495 */ 496 497 skipping = bp >= buflim; 498 499 if (copylev > 0 && !skipping) 500 *bp++ = c; 501 502 /* check for backslash escapes */ 503 if (c == '\\') 504 { 505 if ((c = *p++) == '\0') 506 { 507 /* too far */ 508 p--; 509 goto putg; 510 } 511 if (copylev > 0 && !skipping) 512 *bp++ = c; 513 goto putg; 514 } 515 516 /* check for quoted strings */ 517 if (c == '"') 518 { 519 qmode = !qmode; 520 if (copylev > 0 && !skipping) 521 realqmode = !realqmode; 522 continue; 523 } 524 if (qmode) 525 goto putg; 526 527 /* check for comments */ 528 if (c == '(') 529 { 530 cmtlev++; 531 532 /* allow space for closing paren */ 533 if (!skipping) 534 { 535 buflim--; 536 realcmtlev++; 537 if (copylev++ <= 0) 538 { 539 *bp++ = ' '; 540 *bp++ = c; 541 } 542 } 543 } 544 if (cmtlev > 0) 545 { 546 if (c == ')') 547 { 548 cmtlev--; 549 copylev--; 550 if (!skipping) 551 { 552 realcmtlev--; 553 buflim++; 554 } 555 } 556 continue; 557 } 558 else if (c == ')') 559 { 560 /* syntax error: unmatched ) */ 561 if (!skipping) 562 bp--; 563 } 564 565 566 /* check for characters that may have to be quoted */ 567 if (strchr(".'@,;:\\()", c) != NULL) 568 { 569 /* 570 ** If these occur as the phrase part of a <> 571 ** construct, but are not inside of () or already 572 ** quoted, they will have to be quoted. Note that 573 ** now (but don't actually do the quoting). 574 */ 575 576 if (cmtlev <= 0 && !qmode) 577 quoteit = TRUE; 578 } 579 580 /* check for angle brackets */ 581 if (c == '<') 582 { 583 register char *q; 584 585 /* oops -- have to change our mind */ 586 anglelev++; 587 if (!skipping) 588 realanglelev++; 589 590 bp = buf; 591 if (quoteit) 592 { 593 *bp++ = '"'; 594 595 /* back up over the '<' and any spaces */ 596 --p; 597 while (isascii(*--p) && isspace(*p)) 598 continue; 599 p++; 600 } 601 for (q = addr; q < p; ) 602 { 603 c = *q++; 604 if (bp < buflim) 605 { 606 if (quoteit && c == '"') 607 *bp++ = '\\'; 608 *bp++ = c; 609 } 610 } 611 if (quoteit) 612 { 613 *bp++ = '"'; 614 while ((c = *p++) != '<') 615 { 616 if (bp < buflim) 617 *bp++ = c; 618 } 619 *bp++ = c; 620 } 621 copylev = 0; 622 putgmac = quoteit = FALSE; 623 continue; 624 } 625 626 if (c == '>') 627 { 628 if (anglelev > 0) 629 { 630 anglelev--; 631 if (!skipping) 632 { 633 realanglelev--; 634 buflim++; 635 } 636 } 637 else if (!skipping) 638 { 639 /* syntax error: unmatched > */ 640 if (copylev > 0) 641 bp--; 642 continue; 643 } 644 if (copylev++ <= 0) 645 *bp++ = c; 646 continue; 647 } 648 649 /* must be a real address character */ 650 putg: 651 if (copylev <= 0 && !putgmac) 652 { 653 *bp++ = MACROEXPAND; 654 *bp++ = 'g'; 655 putgmac = TRUE; 656 } 657 } 658 659 /* repair any syntactic damage */ 660 if (realqmode) 661 *bp++ = '"'; 662 while (realcmtlev-- > 0) 663 *bp++ = ')'; 664 while (realanglelev-- > 0) 665 *bp++ = '>'; 666 *bp++ = '\0'; 667 668 if (tTd(33, 1)) 669 printf("crackaddr=>`%s'\n", buf); 670 671 return (buf); 672 } 673 /* 674 ** PUTHEADER -- put the header part of a message from the in-core copy 675 ** 676 ** Parameters: 677 ** fp -- file to put it on. 678 ** m -- mailer to use. 679 ** e -- envelope to use. 680 ** 681 ** Returns: 682 ** none. 683 ** 684 ** Side Effects: 685 ** none. 686 */ 687 688 /* 689 * Macro for fast max (not available in e.g. DG/UX, 386/ix). 690 */ 691 #ifndef MAX 692 # define MAX(a,b) (((a)>(b))?(a):(b)) 693 #endif 694 695 putheader(fp, m, e) 696 register FILE *fp; 697 register MAILER *m; 698 register ENVELOPE *e; 699 { 700 char buf[MAX(MAXLINE,BUFSIZ)]; 701 register HDR *h; 702 char obuf[MAXLINE]; 703 704 for (h = e->e_header; h != NULL; h = h->h_link) 705 { 706 register char *p; 707 extern bool bitintersect(); 708 709 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && 710 !bitintersect(h->h_mflags, m->m_flags)) 711 continue; 712 713 /* handle Resent-... headers specially */ 714 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 715 continue; 716 717 p = h->h_value; 718 if (bitset(H_DEFAULT, h->h_flags)) 719 { 720 /* macro expand value if generated internally */ 721 expand(p, buf, &buf[sizeof buf], e); 722 p = buf; 723 if (p == NULL || *p == '\0') 724 continue; 725 } 726 727 if (bitset(H_FROM|H_RCPT, h->h_flags)) 728 { 729 /* address field */ 730 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); 731 732 if (bitset(H_FROM, h->h_flags)) 733 oldstyle = FALSE; 734 commaize(h, p, fp, oldstyle, m, e); 735 } 736 else 737 { 738 /* vanilla header line */ 739 register char *nlp; 740 extern char *capitalize(); 741 742 (void) sprintf(obuf, "%s: ", capitalize(h->h_field)); 743 while ((nlp = strchr(p, '\n')) != NULL) 744 { 745 *nlp = '\0'; 746 (void) strcat(obuf, p); 747 *nlp = '\n'; 748 putline(obuf, fp, m); 749 p = ++nlp; 750 obuf[0] = '\0'; 751 } 752 (void) strcat(obuf, p); 753 putline(obuf, fp, m); 754 } 755 } 756 } 757 /* 758 ** COMMAIZE -- output a header field, making a comma-translated list. 759 ** 760 ** Parameters: 761 ** h -- the header field to output. 762 ** p -- the value to put in it. 763 ** fp -- file to put it to. 764 ** oldstyle -- TRUE if this is an old style header. 765 ** m -- a pointer to the mailer descriptor. If NULL, 766 ** don't transform the name at all. 767 ** e -- the envelope containing the message. 768 ** 769 ** Returns: 770 ** none. 771 ** 772 ** Side Effects: 773 ** outputs "p" to file "fp". 774 */ 775 776 commaize(h, p, fp, oldstyle, m, e) 777 register HDR *h; 778 register char *p; 779 FILE *fp; 780 bool oldstyle; 781 register MAILER *m; 782 register ENVELOPE *e; 783 { 784 register char *obp; 785 int opos; 786 bool firstone = TRUE; 787 char obuf[MAXLINE + 3]; 788 extern char *capitalize(); 789 790 /* 791 ** Output the address list translated by the 792 ** mailer and with commas. 793 */ 794 795 if (tTd(14, 2)) 796 printf("commaize(%s: %s)\n", h->h_field, p); 797 798 obp = obuf; 799 (void) sprintf(obp, "%s: ", capitalize(h->h_field)); 800 opos = strlen(h->h_field) + 2; 801 obp += opos; 802 803 /* 804 ** Run through the list of values. 805 */ 806 807 while (*p != '\0') 808 { 809 register char *name; 810 register int c; 811 char savechar; 812 extern char *remotename(); 813 extern char *DelimChar; /* defined in prescan */ 814 815 /* 816 ** Find the end of the name. New style names 817 ** end with a comma, old style names end with 818 ** a space character. However, spaces do not 819 ** necessarily delimit an old-style name -- at 820 ** signs mean keep going. 821 */ 822 823 /* find end of name */ 824 while ((isascii(*p) && isspace(*p)) || *p == ',') 825 p++; 826 name = p; 827 for (;;) 828 { 829 char *oldp; 830 char pvpbuf[PSBUFSIZE]; 831 extern char **prescan(); 832 833 (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf); 834 p = DelimChar; 835 836 /* look to see if we have an at sign */ 837 oldp = p; 838 while (*p != '\0' && isascii(*p) && isspace(*p)) 839 p++; 840 841 if (*p != '@') 842 { 843 p = oldp; 844 break; 845 } 846 p += *p == '@' ? 1 : 2; 847 while (*p != '\0' && isascii(*p) && isspace(*p)) 848 p++; 849 } 850 /* at the end of one complete name */ 851 852 /* strip off trailing white space */ 853 while (p >= name && 854 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) 855 p--; 856 if (++p == name) 857 continue; 858 savechar = *p; 859 *p = '\0'; 860 861 /* translate the name to be relative */ 862 name = remotename(name, m, bitset(H_FROM, h->h_flags), 863 TRUE, FALSE, e); 864 if (*name == '\0') 865 { 866 *p = savechar; 867 continue; 868 } 869 870 /* output the name with nice formatting */ 871 opos += strlen(name); 872 if (!firstone) 873 opos += 2; 874 if (opos > 78 && !firstone) 875 { 876 (void) strcpy(obp, ",\n"); 877 putline(obuf, fp, m); 878 obp = obuf; 879 (void) sprintf(obp, " "); 880 opos = strlen(obp); 881 obp += opos; 882 opos += strlen(name); 883 } 884 else if (!firstone) 885 { 886 (void) sprintf(obp, ", "); 887 obp += 2; 888 } 889 890 /* strip off quote bits as we output */ 891 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) 892 { 893 if (bitnset(M_7BITS, m->m_flags)) 894 c &= 0177; 895 *obp++ = c; 896 } 897 firstone = FALSE; 898 *p = savechar; 899 } 900 (void) strcpy(obp, "\n"); 901 putline(obuf, fp, m); 902 } 903 /* 904 ** COPYHEADER -- copy header list 905 ** 906 ** This routine is the equivalent of newstr for header lists 907 ** 908 ** Parameters: 909 ** header -- list of header structures to copy. 910 ** 911 ** Returns: 912 ** a copy of 'header'. 913 ** 914 ** Side Effects: 915 ** none. 916 */ 917 918 HDR * 919 copyheader(header) 920 register HDR *header; 921 { 922 register HDR *newhdr; 923 HDR *ret; 924 register HDR **tail = &ret; 925 926 while (header != NULL) 927 { 928 newhdr = (HDR *) xalloc(sizeof(HDR)); 929 STRUCTCOPY(*header, *newhdr); 930 *tail = newhdr; 931 tail = &newhdr->h_link; 932 header = header->h_link; 933 } 934 *tail = NULL; 935 936 return ret; 937 } 938