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 6.21 (Berkeley) 03/18/93"; 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 buf[MAXLINE]; 286 287 /* 288 ** Set up macros for possible expansion in headers. 289 */ 290 291 define('f', e->e_sender, e); 292 define('g', e->e_sender, e); 293 294 if (tTd(32, 1)) 295 printf("----- collected header -----\n"); 296 msgid = "<none>"; 297 for (h = e->e_header; h != NULL; h = h->h_link) 298 { 299 extern char *capitalize(); 300 301 /* do early binding */ 302 if (bitset(H_DEFAULT, h->h_flags) && h->h_value != NULL) 303 { 304 expand(h->h_value, buf, &buf[sizeof buf], e); 305 if (buf[0] != '\0') 306 { 307 free(h->h_value); 308 h->h_value = newstr(buf); 309 h->h_flags &= ~H_DEFAULT; 310 } 311 } 312 313 if (tTd(32, 1)) 314 printf("%s: %s\n", capitalize(h->h_field), h->h_value); 315 316 /* count the number of times it has been processed */ 317 if (bitset(H_TRACE, h->h_flags)) 318 hopcnt++; 319 320 /* send to this person if we so desire */ 321 if (GrabTo && bitset(H_RCPT, h->h_flags) && 322 !bitset(H_DEFAULT, h->h_flags) && 323 (!bitset(EF_RESENT, e->e_flags) || bitset(H_RESENT, h->h_flags))) 324 { 325 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 326 &e->e_sendqueue, e); 327 } 328 329 /* save the message-id for logging */ 330 if (!queuejob && h->h_value != NULL && 331 strcmp(h->h_field, "message-id") == 0) 332 { 333 msgid = h->h_value; 334 } 335 336 /* see if this is a return-receipt header */ 337 if (bitset(H_RECEIPTTO, h->h_flags)) 338 e->e_receiptto = h->h_value; 339 340 /* see if this is an errors-to header */ 341 if (bitset(H_ERRORSTO, h->h_flags)) 342 (void) sendtolist(h->h_value, (ADDRESS *) NULL, 343 &e->e_errorqueue, e); 344 } 345 if (tTd(32, 1)) 346 printf("----------------------------\n"); 347 348 /* if we are just verifying (that is, sendmail -t -bv), drop out now */ 349 if (OpMode == MD_VERIFY) 350 return; 351 352 /* store hop count */ 353 if (hopcnt > e->e_hopcount) 354 e->e_hopcount = hopcnt; 355 356 /* message priority */ 357 p = hvalue("precedence", e); 358 if (p != NULL) 359 e->e_class = priencode(p); 360 if (!queuejob) 361 e->e_msgpriority = e->e_msgsize 362 - e->e_class * WkClassFact 363 + e->e_nrcpts * WkRecipFact; 364 365 /* full name of from person */ 366 p = hvalue("full-name", e); 367 if (p != NULL) 368 define('x', p, e); 369 370 /* date message originated */ 371 p = hvalue("posted-date", e); 372 if (p == NULL) 373 p = hvalue("date", e); 374 if (p != NULL) 375 define('a', p, e); 376 377 /* 378 ** Log collection information. 379 */ 380 381 # ifdef LOG 382 if (!queuejob && LogLevel > 4) 383 { 384 char *name; 385 char hbuf[MAXNAME]; 386 char sbuf[MAXLINE]; 387 388 if (bitset(EF_RESPONSE, e->e_flags)) 389 name = "[RESPONSE]"; 390 else if (RealHostName[0] == '[') 391 name = RealHostName; 392 else 393 { 394 extern char *inet_ntoa(); 395 396 name = hbuf; 397 (void)sprintf(hbuf, "%.80s (%s)", 398 RealHostName, inet_ntoa(RealHostAddr.sin_addr)); 399 } 400 401 /* some versions of syslog only take 5 printf args */ 402 sprintf(sbuf, "from=%.200s, size=%ld, class=%d, pri=%ld, nrcpts=%d, msgid=%.100s", 403 e->e_from.q_paddr, e->e_msgsize, e->e_class, 404 e->e_msgpriority, e->e_nrcpts, msgid); 405 syslog(LOG_INFO, "%s: %s, relay=%s", 406 e->e_id, sbuf, name); 407 } 408 # endif /* LOG */ 409 } 410 /* 411 ** PRIENCODE -- encode external priority names into internal values. 412 ** 413 ** Parameters: 414 ** p -- priority in ascii. 415 ** 416 ** Returns: 417 ** priority as a numeric level. 418 ** 419 ** Side Effects: 420 ** none. 421 */ 422 423 priencode(p) 424 char *p; 425 { 426 register int i; 427 428 for (i = 0; i < NumPriorities; i++) 429 { 430 if (!strcasecmp(p, Priorities[i].pri_name)) 431 return (Priorities[i].pri_val); 432 } 433 434 /* unknown priority */ 435 return (0); 436 } 437 /* 438 ** CRACKADDR -- parse an address and turn it into a macro 439 ** 440 ** This doesn't actually parse the address -- it just extracts 441 ** it and replaces it with "$g". The parse is totally ad hoc 442 ** and isn't even guaranteed to leave something syntactically 443 ** identical to what it started with. However, it does leave 444 ** something semantically identical. 445 ** 446 ** This algorithm has been cleaned up to handle a wider range 447 ** of cases -- notably quoted and backslash escaped strings. 448 ** This modification makes it substantially better at preserving 449 ** the original syntax. 450 ** 451 ** Parameters: 452 ** addr -- the address to be cracked. 453 ** 454 ** Returns: 455 ** a pointer to the new version. 456 ** 457 ** Side Effects: 458 ** none. 459 ** 460 ** Warning: 461 ** The return value is saved in local storage and should 462 ** be copied if it is to be reused. 463 */ 464 465 char * 466 crackaddr(addr) 467 register char *addr; 468 { 469 register char *p; 470 register char c; 471 int cmtlev; 472 int realcmtlev; 473 int anglelev, realanglelev; 474 int copylev; 475 bool qmode; 476 bool realqmode; 477 bool skipping; 478 bool putgmac = FALSE; 479 bool quoteit = FALSE; 480 register char *bp; 481 char *buflim; 482 static char buf[MAXNAME]; 483 484 if (tTd(33, 1)) 485 printf("crackaddr(%s)\n", addr); 486 487 /* strip leading spaces */ 488 while (*addr != '\0' && isascii(*addr) && isspace(*addr)) 489 addr++; 490 491 /* 492 ** Start by assuming we have no angle brackets. This will be 493 ** adjusted later if we find them. 494 */ 495 496 bp = buf; 497 buflim = &buf[sizeof buf - 5]; 498 p = addr; 499 copylev = anglelev = realanglelev = cmtlev = realcmtlev = 0; 500 qmode = realqmode = FALSE; 501 502 while ((c = *p++) != '\0') 503 { 504 /* 505 ** If the buffer is overful, go into a special "skipping" 506 ** mode that tries to keep legal syntax but doesn't actually 507 ** output things. 508 */ 509 510 skipping = bp >= buflim; 511 512 if (copylev > 0 && !skipping) 513 *bp++ = c; 514 515 /* check for backslash escapes */ 516 if (c == '\\') 517 { 518 if ((c = *p++) == '\0') 519 { 520 /* too far */ 521 p--; 522 goto putg; 523 } 524 if (copylev > 0 && !skipping) 525 *bp++ = c; 526 goto putg; 527 } 528 529 /* check for quoted strings */ 530 if (c == '"') 531 { 532 qmode = !qmode; 533 if (copylev > 0 && !skipping) 534 realqmode = !realqmode; 535 continue; 536 } 537 if (qmode) 538 goto putg; 539 540 /* check for comments */ 541 if (c == '(') 542 { 543 cmtlev++; 544 545 /* allow space for closing paren */ 546 if (!skipping) 547 { 548 buflim--; 549 realcmtlev++; 550 if (copylev++ <= 0) 551 { 552 *bp++ = ' '; 553 *bp++ = c; 554 } 555 } 556 } 557 if (cmtlev > 0) 558 { 559 if (c == ')') 560 { 561 cmtlev--; 562 copylev--; 563 if (!skipping) 564 { 565 realcmtlev--; 566 buflim++; 567 } 568 } 569 continue; 570 } 571 else if (c == ')') 572 { 573 /* syntax error: unmatched ) */ 574 if (!skipping) 575 bp--; 576 } 577 578 579 /* check for characters that may have to be quoted */ 580 if (strchr(".'@,;:\\()", c) != NULL) 581 { 582 /* 583 ** If these occur as the phrase part of a <> 584 ** construct, but are not inside of () or already 585 ** quoted, they will have to be quoted. Note that 586 ** now (but don't actually do the quoting). 587 */ 588 589 if (cmtlev <= 0 && !qmode) 590 quoteit = TRUE; 591 } 592 593 /* check for angle brackets */ 594 if (c == '<') 595 { 596 register char *q; 597 598 /* oops -- have to change our mind */ 599 anglelev++; 600 if (!skipping) 601 realanglelev++; 602 603 bp = buf; 604 if (quoteit) 605 { 606 *bp++ = '"'; 607 608 /* back up over the '<' and any spaces */ 609 --p; 610 while (isascii(*--p) && isspace(*p)) 611 continue; 612 p++; 613 } 614 for (q = addr; q < p; ) 615 { 616 c = *q++; 617 if (bp < buflim) 618 { 619 if (quoteit && c == '"') 620 *bp++ = '\\'; 621 *bp++ = c; 622 } 623 } 624 if (quoteit) 625 { 626 *bp++ = '"'; 627 while ((c = *p++) != '<') 628 { 629 if (bp < buflim) 630 *bp++ = c; 631 } 632 *bp++ = c; 633 } 634 copylev = 0; 635 putgmac = quoteit = FALSE; 636 continue; 637 } 638 639 if (c == '>') 640 { 641 if (anglelev > 0) 642 { 643 anglelev--; 644 if (!skipping) 645 { 646 realanglelev--; 647 buflim++; 648 } 649 } 650 else if (!skipping) 651 { 652 /* syntax error: unmatched > */ 653 if (copylev > 0) 654 bp--; 655 continue; 656 } 657 if (copylev++ <= 0) 658 *bp++ = c; 659 continue; 660 } 661 662 /* must be a real address character */ 663 putg: 664 if (copylev <= 0 && !putgmac) 665 { 666 *bp++ = MACROEXPAND; 667 *bp++ = 'g'; 668 putgmac = TRUE; 669 } 670 } 671 672 /* repair any syntactic damage */ 673 if (realqmode) 674 *bp++ = '"'; 675 while (realcmtlev-- > 0) 676 *bp++ = ')'; 677 while (realanglelev-- > 0) 678 *bp++ = '>'; 679 *bp++ = '\0'; 680 681 if (tTd(33, 1)) 682 printf("crackaddr=>`%s'\n", buf); 683 684 return (buf); 685 } 686 /* 687 ** PUTHEADER -- put the header part of a message from the in-core copy 688 ** 689 ** Parameters: 690 ** fp -- file to put it on. 691 ** m -- mailer to use. 692 ** e -- envelope to use. 693 ** 694 ** Returns: 695 ** none. 696 ** 697 ** Side Effects: 698 ** none. 699 */ 700 701 /* 702 * Macro for fast max (not available in e.g. DG/UX, 386/ix). 703 */ 704 #ifndef MAX 705 # define MAX(a,b) (((a)>(b))?(a):(b)) 706 #endif 707 708 putheader(fp, m, e) 709 register FILE *fp; 710 register MAILER *m; 711 register ENVELOPE *e; 712 { 713 char buf[MAX(MAXLINE,BUFSIZ)]; 714 register HDR *h; 715 char obuf[MAXLINE]; 716 717 for (h = e->e_header; h != NULL; h = h->h_link) 718 { 719 register char *p; 720 extern bool bitintersect(); 721 722 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && 723 !bitintersect(h->h_mflags, m->m_flags)) 724 continue; 725 726 /* handle Resent-... headers specially */ 727 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 728 continue; 729 730 p = h->h_value; 731 if (bitset(H_DEFAULT, h->h_flags)) 732 { 733 /* macro expand value if generated internally */ 734 expand(p, buf, &buf[sizeof buf], e); 735 p = buf; 736 if (p == NULL || *p == '\0') 737 continue; 738 } 739 740 if (bitset(H_FROM|H_RCPT, h->h_flags)) 741 { 742 /* address field */ 743 bool oldstyle = bitset(EF_OLDSTYLE, e->e_flags); 744 745 if (bitset(H_FROM, h->h_flags)) 746 oldstyle = FALSE; 747 commaize(h, p, fp, oldstyle, m, e); 748 } 749 else 750 { 751 /* vanilla header line */ 752 register char *nlp; 753 extern char *capitalize(); 754 755 (void) sprintf(obuf, "%s: ", capitalize(h->h_field)); 756 while ((nlp = strchr(p, '\n')) != NULL) 757 { 758 *nlp = '\0'; 759 (void) strcat(obuf, p); 760 *nlp = '\n'; 761 putline(obuf, fp, m); 762 p = ++nlp; 763 obuf[0] = '\0'; 764 } 765 (void) strcat(obuf, p); 766 putline(obuf, fp, m); 767 } 768 } 769 } 770 /* 771 ** COMMAIZE -- output a header field, making a comma-translated list. 772 ** 773 ** Parameters: 774 ** h -- the header field to output. 775 ** p -- the value to put in it. 776 ** fp -- file to put it to. 777 ** oldstyle -- TRUE if this is an old style header. 778 ** m -- a pointer to the mailer descriptor. If NULL, 779 ** don't transform the name at all. 780 ** e -- the envelope containing the message. 781 ** 782 ** Returns: 783 ** none. 784 ** 785 ** Side Effects: 786 ** outputs "p" to file "fp". 787 */ 788 789 commaize(h, p, fp, oldstyle, m, e) 790 register HDR *h; 791 register char *p; 792 FILE *fp; 793 bool oldstyle; 794 register MAILER *m; 795 register ENVELOPE *e; 796 { 797 register char *obp; 798 int opos; 799 bool firstone = TRUE; 800 char obuf[MAXLINE + 3]; 801 extern char *capitalize(); 802 803 /* 804 ** Output the address list translated by the 805 ** mailer and with commas. 806 */ 807 808 if (tTd(14, 2)) 809 printf("commaize(%s: %s)\n", h->h_field, p); 810 811 obp = obuf; 812 (void) sprintf(obp, "%s: ", capitalize(h->h_field)); 813 opos = strlen(h->h_field) + 2; 814 obp += opos; 815 816 /* 817 ** Run through the list of values. 818 */ 819 820 while (*p != '\0') 821 { 822 register char *name; 823 register int c; 824 char savechar; 825 extern char *remotename(); 826 827 /* 828 ** Find the end of the name. New style names 829 ** end with a comma, old style names end with 830 ** a space character. However, spaces do not 831 ** necessarily delimit an old-style name -- at 832 ** signs mean keep going. 833 */ 834 835 /* find end of name */ 836 while ((isascii(*p) && isspace(*p)) || *p == ',') 837 p++; 838 name = p; 839 for (;;) 840 { 841 auto char *oldp; 842 char pvpbuf[PSBUFSIZE]; 843 extern char **prescan(); 844 845 (void) prescan(p, oldstyle ? ' ' : ',', pvpbuf, &oldp); 846 p = oldp; 847 848 /* look to see if we have an at sign */ 849 while (*p != '\0' && isascii(*p) && isspace(*p)) 850 p++; 851 852 if (*p != '@') 853 { 854 p = oldp; 855 break; 856 } 857 p += *p == '@' ? 1 : 2; 858 while (*p != '\0' && isascii(*p) && isspace(*p)) 859 p++; 860 } 861 /* at the end of one complete name */ 862 863 /* strip off trailing white space */ 864 while (p >= name && 865 ((isascii(*p) && isspace(*p)) || *p == ',' || *p == '\0')) 866 p--; 867 if (++p == name) 868 continue; 869 savechar = *p; 870 *p = '\0'; 871 872 /* translate the name to be relative */ 873 name = remotename(name, m, bitset(H_FROM, h->h_flags), 874 TRUE, FALSE, TRUE, e); 875 if (*name == '\0') 876 { 877 *p = savechar; 878 continue; 879 } 880 881 /* output the name with nice formatting */ 882 opos += strlen(name); 883 if (!firstone) 884 opos += 2; 885 if (opos > 78 && !firstone) 886 { 887 (void) strcpy(obp, ",\n"); 888 putline(obuf, fp, m); 889 obp = obuf; 890 (void) sprintf(obp, " "); 891 opos = strlen(obp); 892 obp += opos; 893 opos += strlen(name); 894 } 895 else if (!firstone) 896 { 897 (void) sprintf(obp, ", "); 898 obp += 2; 899 } 900 901 /* strip off quote bits as we output */ 902 while ((c = *name++) != '\0' && obp < &obuf[MAXLINE]) 903 { 904 if (bitnset(M_7BITS, m->m_flags)) 905 c &= 0177; 906 *obp++ = c; 907 } 908 firstone = FALSE; 909 *p = savechar; 910 } 911 (void) strcpy(obp, "\n"); 912 putline(obuf, fp, m); 913 } 914 /* 915 ** COPYHEADER -- copy header list 916 ** 917 ** This routine is the equivalent of newstr for header lists 918 ** 919 ** Parameters: 920 ** header -- list of header structures to copy. 921 ** 922 ** Returns: 923 ** a copy of 'header'. 924 ** 925 ** Side Effects: 926 ** none. 927 */ 928 929 HDR * 930 copyheader(header) 931 register HDR *header; 932 { 933 register HDR *newhdr; 934 HDR *ret; 935 register HDR **tail = &ret; 936 937 while (header != NULL) 938 { 939 newhdr = (HDR *) xalloc(sizeof(HDR)); 940 STRUCTCOPY(*header, *newhdr); 941 *tail = newhdr; 942 tail = &newhdr->h_link; 943 header = header->h_link; 944 } 945 *tail = NULL; 946 947 return ret; 948 } 949