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 6.32 (Berkeley) 04/30/93"; 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 84 /* strip field value on front */ 85 if (*fvalue == ' ') 86 fvalue++; 87 88 /* see if it is a known type */ 89 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 90 { 91 if (strcasecmp(hi->hi_field, fname) == 0) 92 break; 93 } 94 95 /* see if this is a resent message */ 96 if (!def && bitset(H_RESENT, hi->hi_flags)) 97 e->e_flags |= EF_RESENT; 98 99 /* if this means "end of header" quit now */ 100 if (bitset(H_EOH, hi->hi_flags)) 101 return (hi->hi_flags); 102 103 /* drop explicit From: if same as what we would generate -- for MH */ 104 p = "resent-from"; 105 if (!bitset(EF_RESENT, e->e_flags)) 106 p += 7; 107 if (!def && !bitset(EF_QUEUERUN, e->e_flags) && strcasecmp(fname, p) == 0) 108 { 109 if (e->e_from.q_paddr != NULL && 110 strcmp(fvalue, e->e_from.q_paddr) == 0) 111 return (hi->hi_flags); 112 } 113 114 /* delete default value for this header */ 115 for (hp = &e->e_header; (h = *hp) != NULL; hp = &h->h_link) 116 { 117 if (strcasecmp(fname, h->h_field) == 0 && 118 bitset(H_DEFAULT, h->h_flags) && 119 !bitset(H_FORCE, h->h_flags)) 120 h->h_value = NULL; 121 } 122 123 /* create a new node */ 124 h = (HDR *) xalloc(sizeof *h); 125 h->h_field = newstr(fname); 126 h->h_value = NULL; 127 h->h_link = NULL; 128 bcopy((char *) mopts, (char *) h->h_mflags, sizeof mopts); 129 *hp = h; 130 h->h_flags = hi->hi_flags; 131 if (def) 132 h->h_flags |= H_DEFAULT; 133 if (cond) 134 h->h_flags |= H_CHECK; 135 if (h->h_value != NULL) 136 free((char *) h->h_value); 137 h->h_value = newstr(fvalue); 138 139 /* hack to see if this is a new format message */ 140 if (!def && bitset(H_RCPT|H_FROM, h->h_flags) && 141 (strchr(fvalue, ',') != NULL || strchr(fvalue, '(') != NULL || 142 strchr(fvalue, '<') != NULL || strchr(fvalue, ';') != NULL)) 143 { 144 e->e_flags &= ~EF_OLDSTYLE; 145 } 146 147 return (h->h_flags); 148 } 149 /* 150 ** ADDHEADER -- add a header entry to the end of the queue. 151 ** 152 ** This bypasses the special checking of chompheader. 153 ** 154 ** Parameters: 155 ** field -- the name of the header field. 156 ** value -- the value of the field. 157 ** e -- the envelope to add them to. 158 ** 159 ** Returns: 160 ** none. 161 ** 162 ** Side Effects: 163 ** adds the field on the list of headers for this envelope. 164 */ 165 166 addheader(field, value, e) 167 char *field; 168 char *value; 169 ENVELOPE *e; 170 { 171 register HDR *h; 172 register struct hdrinfo *hi; 173 HDR **hp; 174 175 /* find info struct */ 176 for (hi = HdrInfo; hi->hi_field != NULL; hi++) 177 { 178 if (strcasecmp(field, hi->hi_field) == 0) 179 break; 180 } 181 182 /* find current place in list -- keep back pointer? */ 183 for (hp = &e->e_header; (h = *hp) != NULL; hp = &h->h_link) 184 { 185 if (strcasecmp(field, h->h_field) == 0) 186 break; 187 } 188 189 /* allocate space for new header */ 190 h = (HDR *) xalloc(sizeof *h); 191 h->h_field = field; 192 h->h_value = newstr(value); 193 h->h_link = *hp; 194 h->h_flags = hi->hi_flags | H_DEFAULT; 195 clrbitmap(h->h_mflags); 196 *hp = h; 197 } 198 /* 199 ** HVALUE -- return value of a header. 200 ** 201 ** Only "real" fields (i.e., ones that have not been supplied 202 ** as a default) are used. 203 ** 204 ** Parameters: 205 ** field -- the field name. 206 ** e -- the envelope containing the header. 207 ** 208 ** Returns: 209 ** pointer to the value part. 210 ** NULL if not found. 211 ** 212 ** Side Effects: 213 ** none. 214 */ 215 216 char * 217 hvalue(field, e) 218 char *field; 219 register ENVELOPE *e; 220 { 221 register HDR *h; 222 223 for (h = e->e_header; h != NULL; h = h->h_link) 224 { 225 if (!bitset(H_DEFAULT, h->h_flags) && 226 strcasecmp(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 ** full -- if set, do full processing (e.g., compute 267 ** message priority). 268 ** 269 ** Returns: 270 ** none. 271 ** 272 ** Side Effects: 273 ** Sets a bunch of global variables from information 274 ** in the collected header. 275 ** Aborts the message if the hop count is exceeded. 276 */ 277 278 eatheader(e, full) 279 register ENVELOPE *e; 280 bool full; 281 { 282 register HDR *h; 283 register char *p; 284 int hopcnt = 0; 285 char *msgid; 286 char buf[MAXLINE]; 287 288 /* 289 ** Set up macros for possible expansion in headers. 290 */ 291 292 define('f', e->e_sender, e); 293 define('g', e->e_sender, e); 294 295 if (tTd(32, 1)) 296 printf("----- collected header -----\n"); 297 msgid = "<none>"; 298 for (h = e->e_header; h != NULL; h = h->h_link) 299 { 300 /* do early binding */ 301 if (bitset(H_DEFAULT, h->h_flags) && h->h_value != NULL) 302 { 303 expand(h->h_value, buf, &buf[sizeof buf], e); 304 if (buf[0] != '\0') 305 { 306 h->h_value = newstr(buf); 307 h->h_flags &= ~H_DEFAULT; 308 } 309 } 310 311 if (tTd(32, 1)) 312 printf("%s: %s\n", h->h_field, h->h_value); 313 314 /* count the number of times it has been processed */ 315 if (bitset(H_TRACE, h->h_flags)) 316 hopcnt++; 317 318 /* send to this person if we so desire */ 319 if (GrabTo && bitset(H_RCPT, h->h_flags) && 320 !bitset(H_DEFAULT, h->h_flags) && 321 (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) 322 { 323 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 324 &e->e_sendqueue, e); 325 } 326 327 /* save the message-id for logging */ 328 if (full && h->h_value != NULL && 329 strcasecmp(h->h_field, "message-id") == 0) 330 { 331 msgid = h->h_value; 332 } 333 334 /* see if this is a return-receipt header */ 335 if (bitset(H_RECEIPTTO, h->h_flags)) 336 e->e_receiptto = h->h_value; 337 338 /* see if this is an errors-to header */ 339 if (bitset(H_ERRORSTO, h->h_flags)) 340 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 341 &e->e_errorqueue, e); 342 } 343 if (tTd(32, 1)) 344 printf("----------------------------\n"); 345 346 /* if we are just verifying (that is, sendmail -t -bv), drop out now */ 347 if (OpMode == MD_VERIFY) 348 return; 349 350 /* store hop count */ 351 if (hopcnt > e->e_hopcount) 352 e->e_hopcount = hopcnt; 353 354 /* message priority */ 355 p = hvalue("precedence", e); 356 if (p != NULL) 357 e->e_class = priencode(p); 358 if (full) 359 e->e_msgpriority = e->e_msgsize 360 - e->e_class * WkClassFact 361 + e->e_nrcpts * WkRecipFact; 362 363 /* full name of from person */ 364 p = hvalue("full-name", e); 365 if (p != NULL) 366 define('x', p, e); 367 368 /* date message originated */ 369 p = hvalue("posted-date", e); 370 if (p == NULL) 371 p = hvalue("date", e); 372 if (p != NULL) 373 define('a', p, e); 374 375 /* 376 ** Log collection information. 377 */ 378 379 # ifdef LOG 380 if (full && LogLevel > 4) 381 { 382 char *name; 383 char hbuf[MAXNAME]; 384 char sbuf[MAXLINE]; 385 extern char *macvalue(); 386 387 if (bitset(EF_RESPONSE, e->e_flags)) 388 name = "[RESPONSE]"; 389 else if ((name = macvalue('_', e)) != NULL) 390 ; 391 else if (RealHostName[0] == '[') 392 name = RealHostName; 393 else 394 { 395 extern char *anynet_ntoa(); 396 397 name = hbuf; 398 (void) sprintf(hbuf, "%.80s", RealHostName); 399 if (RealHostAddr.sa.sa_family != 0) 400 { 401 p = &hbuf[strlen(hbuf)]; 402 (void) sprintf(p, " (%s)", 403 anynet_ntoa(&RealHostAddr)); 404 } 405 } 406 407 /* some versions of syslog only take 5 printf args */ 408 sprintf(sbuf, "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d, msgid=%.100s", 409 e->e_from.q_paddr, e->e_msgsize, e->e_class, 410 e->e_msgpriority, e->e_nrcpts, msgid); 411 syslog(LOG_INFO, "%s: %s, relay=%s", 412 e->e_id, sbuf, name); 413 } 414 # endif /* LOG */ 415 } 416 /* 417 ** PRIENCODE -- encode external priority names into internal values. 418 ** 419 ** Parameters: 420 ** p -- priority in ascii. 421 ** 422 ** Returns: 423 ** priority as a numeric level. 424 ** 425 ** Side Effects: 426 ** none. 427 */ 428 429 priencode(p) 430 char *p; 431 { 432 register int i; 433 434 for (i = 0; i < NumPriorities; i++) 435 { 436 if (!strcasecmp(p, Priorities[i].pri_name)) 437 return (Priorities[i].pri_val); 438 } 439 440 /* unknown priority */ 441 return (0); 442 } 443 /* 444 ** CRACKADDR -- parse an address and turn it into a macro 445 ** 446 ** This doesn't actually parse the address -- it just extracts 447 ** it and replaces it with "$g". The parse is totally ad hoc 448 ** and isn't even guaranteed to leave something syntactically 449 ** identical to what it started with. However, it does leave 450 ** something semantically identical. 451 ** 452 ** This algorithm has been cleaned up to handle a wider range 453 ** of cases -- notably quoted and backslash escaped strings. 454 ** This modification makes it substantially better at preserving 455 ** the original syntax. 456 ** 457 ** Parameters: 458 ** addr -- the address to be cracked. 459 ** 460 ** Returns: 461 ** a pointer to the new version. 462 ** 463 ** Side Effects: 464 ** none. 465 ** 466 ** Warning: 467 ** The return value is saved in local storage and should 468 ** be copied if it is to be reused. 469 */ 470 471 char * 472 crackaddr(addr) 473 register char *addr; 474 { 475 register char *p; 476 register char c; 477 int cmtlev; 478 int realcmtlev; 479 int anglelev, realanglelev; 480 int copylev; 481 bool qmode; 482 bool realqmode; 483 bool skipping; 484 bool putgmac = FALSE; 485 bool quoteit = FALSE; 486 register char *bp; 487 char *buflim; 488 static char buf[MAXNAME]; 489 490 if (tTd(33, 1)) 491 printf("crackaddr(%s)\n", addr); 492 493 /* strip leading spaces */ 494 while (*addr != '\0' && isascii(*addr) && isspace(*addr)) 495 addr++; 496 497 /* 498 ** Start by assuming we have no angle brackets. This will be 499 ** adjusted later if we find them. 500 */ 501 502 bp = buf; 503 buflim = &buf[sizeof buf - 5]; 504 p = addr; 505 copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; 506 qmode = realqmode = FALSE; 507 508 while ((c = *p++) != '\0') 509 { 510 /* 511 ** If the buffer is overful, go into a special "skipping" 512 ** mode that tries to keep legal syntax but doesn't actually 513 ** output things. 514 */ 515 516 skipping = bp >= buflim; 517 518 if (copylev > 0 && !skipping) 519 *bp++ = c; 520 521 /* check for backslash escapes */ 522 if (c == '\\') 523 { 524 /* arrange to quote the address */ 525 if (cmtlev <= 0 && !qmode) 526 quoteit = TRUE; 527 528 if ((c = *p++) == '\0') 529 { 530 /* too far */ 531 p--; 532 goto putg; 533 } 534 if (copylev > 0 && !skipping) 535 *bp++ = c; 536 goto putg; 537 } 538 539 /* check for quoted strings */ 540 if (c == '"') 541 { 542 qmode = !qmode; 543 if (copylev > 0 && !skipping) 544 realqmode = !realqmode; 545 continue; 546 } 547 if (qmode) 548 goto putg; 549 550 /* check for comments */ 551 if (c == '(') 552 { 553 cmtlev++; 554 555 /* allow space for closing paren */ 556 if (!skipping) 557 { 558 buflim--; 559 realcmtlev++; 560 if (copylev++ <= 0) 561 { 562 *bp++ = ' '; 563 *bp++ = c; 564 } 565 } 566 } 567 if (cmtlev > 0) 568 { 569 if (c == ')') 570 { 571 cmtlev--; 572 copylev--; 573 if (!skipping) 574 { 575 realcmtlev--; 576 buflim++; 577 } 578 } 579 continue; 580 } 581 else if (c == ')') 582 { 583 /* syntax error: unmatched ) */ 584 if (!skipping) 585 bp--; 586 } 587 588 589 /* check for characters that may have to be quoted */ 590 if (strchr(".'@,;:\\()", c) != NULL) 591 { 592 /* 593 ** If these occur as the phrase part of a <> 594 ** construct, but are not inside of () or already 595 ** quoted, they will have to be quoted. Note that 596 ** now (but don't actually do the quoting). 597 */ 598 599 if (cmtlev <= 0 && !qmode) 600 quoteit = TRUE; 601 } 602 603 /* check for angle brackets */ 604 if (c == '<') 605 { 606 register char *q; 607 608 /* oops -- have to change our mind */ 609 anglelev++; 610 if (!skipping) 611 realanglelev++; 612 613 bp = buf; 614 if (quoteit) 615 { 616 *bp++ = '"'; 617 618 /* back up over the '<' and any spaces */ 619 --p; 620 while (isascii(*--p) && isspace(*p)) 621 continue; 622 p++; 623 } 624 for (q = addr; q < p; ) 625 { 626 c = *q++; 627 if (bp < buflim) 628 { 629 if (quoteit && c == '"') 630 *bp++ = '\\'; 631 *bp++ = c; 632 } 633 } 634 if (quoteit) 635 { 636 *bp++ = '"'; 637 while ((c = *p++) != '<') 638 { 639 if (bp < buflim) 640 *bp++ = c; 641 } 642 *bp++ = c; 643 } 644 copylev = 0; 645 putgmac = quoteit = FALSE; 646 continue; 647 } 648 649 if (c == '>') 650 { 651 if (anglelev > 0) 652 { 653 anglelev--; 654 if (!skipping) 655 { 656 realanglelev--; 657 buflim++; 658 } 659 } 660 else if (!skipping) 661 { 662 /* syntax error: unmatched > */ 663 if (copylev > 0) 664 bp--; 665 continue; 666 } 667 if (copylev++ <= 0) 668 *bp++ = c; 669 continue; 670 } 671 672 /* must be a real address character */ 673 putg: 674 if (copylev <= 0 && !putgmac) 675 { 676 *bp++ = MACROEXPAND; 677 *bp++ = 'g'; 678 putgmac = TRUE; 679 } 680 } 681 682 /* repair any syntactic damage */ 683 if (realqmode) 684 *bp++ = '"'; 685 while (realcmtlev-- > 0) 686 *bp++ = ')'; 687 while (realanglelev-- > 0) 688 *bp++ = '>'; 689 *bp++ = '\0'; 690 691 if (tTd(33, 1)) 692 printf("crackaddr=>`%s'\n", buf); 693 694 return (buf); 695 } 696 /* 697 ** PUTHEADER -- put the header part of a message from the in-core copy 698 ** 699 ** Parameters: 700 ** fp -- file to put it on. 701 ** m -- mailer to use. 702 ** e -- envelope to use. 703 ** 704 ** Returns: 705 ** none. 706 ** 707 ** Side Effects: 708 ** none. 709 */ 710 711 /* 712 * Macro for fast max (not available in e.g. DG/UX, 386/ix). 713 */ 714 #ifndef MAX 715 # define MAX(a,b) (((a)>(b))?(a):(b)) 716 #endif 717 718 putheader(fp, m, e) 719 register FILE *fp; 720 register MAILER *m; 721 register ENVELOPE *e; 722 { 723 char buf[MAX(MAXLINE,BUFSIZ)]; 724 register HDR *h; 725 char obuf[MAXLINE]; 726 727 for (h = e->e_header; h != NULL; h = h->h_link) 728 { 729 register char *p; 730 extern bool bitintersect(); 731 732 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && 733 !bitintersect(h->h_mflags, m->m_flags)) 734 continue; 735 736 /* handle Resent-... headers specially */ 737 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 738 continue; 739 740 p = h->h_value; 741 if (bitset(H_DEFAULT, h->h_flags)) 742 { 743 /* macro expand value if generated internally */ 744 expand(p, buf, &buf[sizeof buf], e); 745 p = buf; 746 if (p == NULL || *p == '\0') 747 continue; 748 } 749 750 if (bitset(H_FROM|H_RCPT, h->h_flags)) 751 { 752 /* address field */ 753 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); 754 755 if (bitset(H_FROM, h->h_flags)) 756 oldstyle = FALSE; 757 commaize(h, p, fp, oldstyle, m, e); 758 } 759 else 760 { 761 /* vanilla header line */ 762 register char *nlp; 763 764 (void) sprintf(obuf, "%s: ", h->h_field); 765 while ((nlp = strchr(p, '\n')) != NULL) 766 { 767 *nlp = '\0'; 768 (void) strcat(obuf, p); 769 *nlp = '\n'; 770 putline(obuf, fp, m); 771 p = ++nlp; 772 obuf[0] = '\0'; 773 } 774 (void) strcat(obuf, p); 775 putline(obuf, fp, m); 776 } 777 } 778 } 779 /* 780 ** COMMAIZE -- output a header field, making a comma-translated list. 781 ** 782 ** Parameters: 783 ** h -- the header field to output. 784 ** p -- the value to put in it. 785 ** fp -- file to put it to. 786 ** oldstyle -- TRUE if this is an old style header. 787 ** m -- a pointer to the mailer descriptor. If NULL, 788 ** don't transform the name at all. 789 ** e -- the envelope containing the message. 790 ** 791 ** Returns: 792 ** none. 793 ** 794 ** Side Effects: 795 ** outputs "p" to file "fp". 796 */ 797 798 commaize(h, p, fp, oldstyle, m, e) 799 register HDR *h; 800 register char *p; 801 FILE *fp; 802 bool oldstyle; 803 register MAILER *m; 804 register ENVELOPE *e; 805 { 806 register char *obp; 807 int opos; 808 bool firstone = TRUE; 809 char obuf[MAXLINE + 3]; 810 811 /* 812 ** Output the address list translated by the 813 ** mailer and with commas. 814 */ 815 816 if (tTd(14, 2)) 817 printf("commaize(%s: %s)\n", h->h_field, p); 818 819 obp = obuf; 820 (void) sprintf(obp, "%s: ", h->h_field); 821 opos = strlen(h->h_field) + 2; 822 obp += opos; 823 824 /* 825 ** Run through the list of values. 826 */ 827 828 while (*p != '\0') 829 { 830 register char *name; 831 register int c; 832 char savechar; 833 int flags; 834 auto int stat; 835 extern char *remotename(); 836 837 /* 838 ** Find the end of the name. New style names 839 ** end with a comma, old style names end with 840 ** a space character. However, spaces do not 841 ** necessarily delimit an old-style name -- at 842 ** signs mean keep going. 843 */ 844 845 /* find end of name */ 846 while ((isascii(*p) && isspace(*p)) || *p == ',') 847 p++; 848 name = p; 849 for (;;) 850 { 851 auto char *oldp; 852 char pvpbuf[PSBUFSIZE]; 853 extern char **prescan(); 854 855 (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf, &oldp); 856 p = oldp; 857 858 /* look to see if we have an at sign */ 859 while (*p != '\0' && isascii(*p) && isspace(*p)) 860 p++; 861 862 if (*p != '@') 863 { 864 p = oldp; 865 break; 866 } 867 p += *p == '@' ? 1 : 2; 868 while (*p != '\0' && isascii(*p) && isspace(*p)) 869 p++; 870 } 871 /* at the end of one complete name */ 872 873 /* strip off trailing white space */ 874 while (p >= name && 875 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) 876 p--; 877 if (++p == name) 878 continue; 879 savechar = *p; 880 *p = '\0'; 881 882 /* translate the name to be relative */ 883 flags = RF_HEADERADDR|RF_ADDDOMAIN; 884 if (bitset(H_FROM, h->h_flags)) 885 flags |= RF_SENDERADDR; 886 stat = EX_OK; 887 name = remotename(name, m, flags, &stat, e); 888 if (*name == '\0') 889 { 890 *p = savechar; 891 continue; 892 } 893 894 /* output the name with nice formatting */ 895 opos += strlen(name); 896 if (!firstone) 897 opos += 2; 898 if (opos > 78 && !firstone) 899 { 900 (void) strcpy(obp, ",\n"); 901 putline(obuf, fp, m); 902 obp = obuf; 903 (void) sprintf(obp, " "); 904 opos = strlen(obp); 905 obp += opos; 906 opos += strlen(name); 907 } 908 else if (!firstone) 909 { 910 (void) sprintf(obp, ", "); 911 obp += 2; 912 } 913 914 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) 915 *obp++ = c; 916 firstone = FALSE; 917 *p = savechar; 918 } 919 (void) strcpy(obp, "\n"); 920 putline(obuf, fp, m); 921 } 922 /* 923 ** COPYHEADER -- copy header list 924 ** 925 ** This routine is the equivalent of newstr for header lists 926 ** 927 ** Parameters: 928 ** header -- list of header structures to copy. 929 ** 930 ** Returns: 931 ** a copy of 'header'. 932 ** 933 ** Side Effects: 934 ** none. 935 */ 936 937 HDR * 938 copyheader(header) 939 register HDR *header; 940 { 941 register HDR *newhdr; 942 HDR *ret; 943 register HDR **tail = &ret; 944 945 while (header != NULL) 946 { 947 newhdr = (HDR *) xalloc(sizeof(HDR)); 948 STRUCTCOPY(*header, *newhdr); 949 *tail = newhdr; 950 tail = &newhdr->h_link; 951 header = header->h_link; 952 } 953 *tail = NULL; 954 955 return ret; 956 } 957