1 # include "sendmail.h" 2 3 SCCSID(@(#)parseaddr.c 3.48 08/25/82); 4 5 /* 6 ** PARSE -- Parse an address 7 ** 8 ** Parses an address and breaks it up into three parts: a 9 ** net to transmit the message on, the host to transmit it 10 ** to, and a user on that host. These are loaded into an 11 ** ADDRESS header with the values squirreled away if necessary. 12 ** The "user" part may not be a real user; the process may 13 ** just reoccur on that machine. For example, on a machine 14 ** with an arpanet connection, the address 15 ** csvax.bill@berkeley 16 ** will break up to a "user" of 'csvax.bill' and a host 17 ** of 'berkeley' -- to be transmitted over the arpanet. 18 ** 19 ** Parameters: 20 ** addr -- the address to parse. 21 ** a -- a pointer to the address descriptor buffer. 22 ** If NULL, a header will be created. 23 ** copyf -- determines what shall be copied: 24 ** -1 -- don't copy anything. The printname 25 ** (q_paddr) is just addr, and the 26 ** user & host are allocated internally 27 ** to parse. 28 ** 0 -- copy out the parsed user & host, but 29 ** don't copy the printname. 30 ** +1 -- copy everything. 31 ** 32 ** Returns: 33 ** A pointer to the address descriptor header (`a' if 34 ** `a' is non-NULL). 35 ** NULL on error. 36 ** 37 ** Side Effects: 38 ** none 39 */ 40 41 # define DELIMCHARS "$()<>,;\\\"\r\n" /* word delimiters */ 42 43 ADDRESS * 44 parse(addr, a, copyf) 45 char *addr; 46 register ADDRESS *a; 47 int copyf; 48 { 49 register char **pvp; 50 register struct mailer *m; 51 extern char **prescan(); 52 extern ADDRESS *buildaddr(); 53 static char nbuf[MAXNAME]; 54 55 /* 56 ** Initialize and prescan address. 57 */ 58 59 CurEnv->e_to = addr; 60 # ifdef DEBUG 61 if (tTd(20, 1)) 62 printf("\n--parse(%s)\n", addr); 63 # endif DEBUG 64 65 pvp = prescan(addr, '\0'); 66 if (pvp == NULL) 67 return (NULL); 68 69 /* 70 ** Apply rewriting rules. 71 ** Ruleset 4 rewrites the address into a form that will 72 ** be reflected in the outgoing message. It must 73 ** not resolve. 74 ** Ruleset 0 does basic parsing. It must resolve. 75 */ 76 77 rewrite(pvp, 4); 78 rewrite(pvp, 0); 79 80 /* 81 ** See if we resolved to a real mailer. 82 */ 83 84 if (pvp[0][0] != CANONNET) 85 { 86 setstat(EX_USAGE); 87 usrerr("cannot resolve name"); 88 return (NULL); 89 } 90 91 /* 92 ** Build canonical address from pvp. 93 */ 94 95 a = buildaddr(pvp, a); 96 if (a == NULL) 97 return (NULL); 98 m = a->q_mailer; 99 100 /* 101 ** Make local copies of the host & user and then 102 ** transport them out. 103 */ 104 105 if (copyf > 0) 106 a->q_paddr = newstr(addr); 107 else 108 a->q_paddr = addr; 109 if (copyf >= 0) 110 { 111 if (a->q_host != NULL) 112 a->q_host = newstr(a->q_host); 113 else 114 a->q_host = ""; 115 if (a->q_user != a->q_paddr) 116 a->q_user = newstr(a->q_user); 117 } 118 119 /* 120 ** Do UPPER->lower case mapping unless inhibited. 121 */ 122 123 if (!bitset(M_HST_UPPER, m->m_flags)) 124 makelower(a->q_host); 125 if (!bitset(M_USR_UPPER, m->m_flags)) 126 makelower(a->q_user); 127 128 /* 129 ** Compute return value. 130 */ 131 132 # ifdef DEBUG 133 if (tTd(20, 1)) 134 { 135 printf("parse-->"); 136 printaddr(a, FALSE); 137 } 138 # endif DEBUG 139 140 return (a); 141 } 142 /* 143 ** PRESCAN -- Prescan name and make it canonical 144 ** 145 ** Scans a name and turns it into canonical form. This involves 146 ** deleting blanks, comments (in parentheses), and turning the 147 ** word "at" into an at-sign ("@"). The name is copied as this 148 ** is done; it is legal to copy a name onto itself, since this 149 ** process can only make things smaller. 150 ** 151 ** This routine knows about quoted strings and angle brackets. 152 ** 153 ** There are certain subtleties to this routine. The one that 154 ** comes to mind now is that backslashes on the ends of names 155 ** are silently stripped off; this is intentional. The problem 156 ** is that some versions of sndmsg (like at LBL) set the kill 157 ** character to something other than @ when reading addresses; 158 ** so people type "csvax.eric\@berkeley" -- which screws up the 159 ** berknet mailer. 160 ** 161 ** Parameters: 162 ** addr -- the name to chomp. 163 ** delim -- the delimiter for the address, normally 164 ** '\0' or ','; \0 is accepted in any case. 165 ** are moving in place; set buflim to high core. 166 ** 167 ** Returns: 168 ** A pointer to a vector of tokens. 169 ** NULL on error. 170 ** 171 ** Side Effects: 172 ** none. 173 */ 174 175 # define OPER 1 176 # define ATOM 2 177 # define EOTOK 3 178 # define QSTRING 4 179 # define SPACE 5 180 # define ONEMORE 6 181 # define GETONE 7 182 # define MACRO 8 183 184 char ** 185 prescan(addr, delim) 186 char *addr; 187 char delim; 188 { 189 register char *p; 190 static char buf[MAXNAME+MAXATOM]; 191 static char *av[MAXATOM+1]; 192 char **avp; 193 bool bslashmode; 194 int cmntcnt; 195 register char c; 196 char *tok; 197 register char *q; 198 register int state; 199 int nstate; 200 extern char lower(); 201 202 q = buf; 203 bslashmode = FALSE; 204 cmntcnt = 0; 205 avp = av; 206 state = OPER; 207 for (p = addr; *p != '\0' && *p != delim; ) 208 { 209 /* read a token */ 210 tok = q; 211 while ((c = *p++) != '\0' && c != delim) 212 { 213 /* chew up special characters */ 214 c &= ~0200; 215 *q = '\0'; 216 if (bslashmode) 217 { 218 c |= 0200; 219 bslashmode = FALSE; 220 } 221 else if (c == '\\') 222 { 223 bslashmode = TRUE; 224 continue; 225 } 226 else if (c == '"') 227 { 228 if (state == QSTRING) 229 state = OPER; 230 else 231 state = QSTRING; 232 break; 233 } 234 235 nstate = toktype(c); 236 switch (state) 237 { 238 case QSTRING: /* in quoted string */ 239 break; 240 241 case ATOM: /* regular atom */ 242 if (nstate != ATOM) 243 { 244 state = EOTOK; 245 p--; 246 } 247 break; 248 249 case GETONE: /* grab one character */ 250 state = OPER; 251 break; 252 253 case EOTOK: /* after atom or q-string */ 254 state = nstate; 255 if (state == SPACE) 256 continue; 257 break; 258 259 case SPACE: /* linear white space */ 260 state = nstate; 261 break; 262 263 case OPER: /* operator */ 264 if (nstate == SPACE) 265 continue; 266 state = nstate; 267 break; 268 269 case ONEMORE: /* $- etc. */ 270 state = GETONE; 271 break; 272 273 default: 274 syserr("prescan: unknown state %d", state); 275 } 276 277 if (state == EOTOK || state == SPACE) 278 break; 279 280 /* squirrel it away */ 281 if (q >= &buf[sizeof buf - 5]) 282 { 283 usrerr("Address too long"); 284 return (NULL); 285 } 286 *q++ = c; 287 288 /* decide whether this represents end of token */ 289 if (state == OPER || state == GETONE) 290 break; 291 } 292 if (c == '\0' || c == delim) 293 p--; 294 295 /* new token */ 296 if (tok == q) 297 continue; 298 *q++ = '\0'; 299 300 c = tok[0]; 301 if (c == '(') 302 { 303 cmntcnt++; 304 continue; 305 } 306 else if (c == ')') 307 { 308 if (cmntcnt <= 0) 309 { 310 usrerr("Unbalanced ')'"); 311 return (NULL); 312 } 313 else 314 { 315 cmntcnt--; 316 continue; 317 } 318 } 319 else if (cmntcnt > 0) 320 continue; 321 322 if (avp >= &av[MAXATOM]) 323 { 324 syserr("prescan: too many tokens"); 325 return (NULL); 326 } 327 *avp++ = tok; 328 } 329 *avp = NULL; 330 if (cmntcnt > 0) 331 usrerr("Unbalanced '('"); 332 else if (state == QSTRING) 333 usrerr("Unbalanced '\"'"); 334 else if (av[0] != NULL) 335 return (av); 336 return (NULL); 337 } 338 /* 339 ** TOKTYPE -- return token type 340 ** 341 ** Parameters: 342 ** c -- the character in question. 343 ** 344 ** Returns: 345 ** Its type. 346 ** 347 ** Side Effects: 348 ** none. 349 */ 350 351 toktype(c) 352 register char c; 353 { 354 static char buf[50]; 355 static bool firstime = TRUE; 356 357 if (firstime) 358 { 359 firstime = FALSE; 360 expand("$o", buf, &buf[sizeof buf - 1], CurEnv); 361 (void) strcat(buf, DELIMCHARS); 362 } 363 if (c == MATCHCLASS || c == MATCHREPL) 364 return (ONEMORE); 365 if (!isascii(c)) 366 return (ATOM); 367 if (isspace(c)) 368 return (SPACE); 369 if (iscntrl(c) || index(buf, c) != NULL) 370 return (OPER); 371 return (ATOM); 372 } 373 /* 374 ** REWRITE -- apply rewrite rules to token vector. 375 ** 376 ** This routine is an ordered production system. Each rewrite 377 ** rule has a LHS (called the pattern) and a RHS (called the 378 ** rewrite); 'rwr' points the the current rewrite rule. 379 ** 380 ** For each rewrite rule, 'avp' points the address vector we 381 ** are trying to match against, and 'pvp' points to the pattern. 382 ** If pvp points to a special match value (MATCHANY, MATCHONE, 383 ** MATCHCLASS) then the address in avp matched is saved away 384 ** in the match vector (pointed to by 'mvp'). 385 ** 386 ** When a match between avp & pvp does not match, we try to 387 ** back out. If we back up over a MATCHONE or a MATCHCLASS 388 ** we must also back out the match in mvp. If we reach a 389 ** MATCHANY we just extend the match and start over again. 390 ** 391 ** When we finally match, we rewrite the address vector 392 ** and try over again. 393 ** 394 ** Parameters: 395 ** pvp -- pointer to token vector. 396 ** 397 ** Returns: 398 ** none. 399 ** 400 ** Side Effects: 401 ** pvp is modified. 402 */ 403 404 struct match 405 { 406 char **first; /* first token matched */ 407 char **last; /* last token matched */ 408 }; 409 410 # define MAXMATCH 9 /* max params per rewrite */ 411 412 413 rewrite(pvp, ruleset) 414 char **pvp; 415 int ruleset; 416 { 417 register char *ap; /* address pointer */ 418 register char *rp; /* rewrite pointer */ 419 register char **avp; /* address vector pointer */ 420 register char **rvp; /* rewrite vector pointer */ 421 struct rewrite *rwr; /* pointer to current rewrite rule */ 422 struct match mlist[MAXMATCH]; /* stores match on LHS */ 423 struct match *mlp; /* cur ptr into mlist */ 424 char *npvp[MAXATOM+1]; /* temporary space for rebuild */ 425 extern bool sameword(); 426 427 # ifdef DEBUG 428 if (tTd(21, 9)) 429 { 430 printf("rewrite: original pvp:\n"); 431 printav(pvp); 432 } 433 # endif DEBUG 434 435 /* 436 ** Run through the list of rewrite rules, applying 437 ** any that match. 438 */ 439 440 for (rwr = RewriteRules[ruleset]; rwr != NULL; ) 441 { 442 # ifdef DEBUG 443 if (tTd(21, 12)) 444 { 445 printf("-----trying rule:\n"); 446 printav(rwr->r_lhs); 447 } 448 # endif DEBUG 449 450 /* try to match on this rule */ 451 mlp = mlist; 452 for (rvp = rwr->r_lhs, avp = pvp; *avp != NULL; ) 453 { 454 ap = *avp; 455 rp = *rvp; 456 457 if (rp == NULL) 458 { 459 /* end-of-pattern before end-of-address */ 460 goto fail; 461 } 462 463 switch (*rp) 464 { 465 register STAB *s; 466 register int class; 467 468 case MATCHCLASS: 469 /* match any token in a class */ 470 class = rp[1]; 471 if (!isalpha(class)) 472 goto fail; 473 if (isupper(class)) 474 class -= 'A'; 475 else 476 class -= 'a'; 477 s = stab(ap, ST_CLASS, ST_FIND); 478 if (s == NULL || (s->s_class & (1L << class)) == 0) 479 goto fail; 480 481 /* explicit fall-through */ 482 483 case MATCHONE: 484 case MATCHANY: 485 /* match exactly one token */ 486 mlp->first = mlp->last = avp++; 487 mlp++; 488 break; 489 490 default: 491 /* must have exact match */ 492 if (!sameword(rp, ap)) 493 goto fail; 494 avp++; 495 break; 496 } 497 498 /* successful match on this token */ 499 rvp++; 500 continue; 501 502 fail: 503 /* match failed -- back up */ 504 while (--rvp >= rwr->r_lhs) 505 { 506 rp = *rvp; 507 if (*rp == MATCHANY) 508 { 509 /* extend binding and continue */ 510 mlp[-1].last = avp++; 511 rvp++; 512 break; 513 } 514 avp--; 515 if (*rp == MATCHONE || *rp == MATCHCLASS) 516 { 517 /* back out binding */ 518 mlp--; 519 } 520 } 521 522 if (rvp < rwr->r_lhs) 523 { 524 /* total failure to match */ 525 break; 526 } 527 } 528 529 /* 530 ** See if we successfully matched 531 */ 532 533 if (rvp >= rwr->r_lhs && *rvp == NULL) 534 { 535 # ifdef DEBUG 536 if (tTd(21, 12)) 537 { 538 printf("-----rule matches:\n"); 539 printav(rwr->r_rhs); 540 } 541 # endif DEBUG 542 543 /* substitute */ 544 for (rvp = rwr->r_rhs, avp = npvp; *rvp != NULL; rvp++) 545 { 546 rp = *rvp; 547 if (*rp == MATCHREPL) 548 { 549 register struct match *m; 550 register char **pp; 551 552 m = &mlist[rp[1] - '1']; 553 # ifdef DEBUG 554 if (tTd(21, 15)) 555 { 556 printf("$%c:", rp[1]); 557 pp = m->first; 558 do 559 { 560 printf(" %x=\"", *pp); 561 (void) fflush(stdout); 562 printf("%s\"", *pp); 563 } while (pp++ != m->last); 564 printf("\n"); 565 } 566 # endif DEBUG 567 pp = m->first; 568 do 569 { 570 if (avp >= &npvp[MAXATOM]) 571 { 572 syserr("rewrite: expansion too long"); 573 return; 574 } 575 *avp++ = *pp; 576 } while (pp++ != m->last); 577 } 578 else 579 { 580 if (avp >= &npvp[MAXATOM]) 581 { 582 syserr("rewrite: expansion too long"); 583 return; 584 } 585 *avp++ = rp; 586 } 587 } 588 *avp++ = NULL; 589 bmove((char *) npvp, (char *) pvp, (avp - npvp) * sizeof *avp); 590 # ifdef DEBUG 591 if (tTd(21, 4)) 592 { 593 char **vp; 594 595 printf("rewritten as `"); 596 for (vp = pvp; *vp != NULL; vp++) 597 { 598 if (vp != pvp) 599 printf("_"); 600 xputs(*vp); 601 } 602 printf("'\n"); 603 } 604 # endif DEBUG 605 if (pvp[0][0] == CANONNET) 606 break; 607 } 608 else 609 { 610 # ifdef DEBUG 611 if (tTd(21, 10)) 612 printf("----- rule fails\n"); 613 # endif DEBUG 614 rwr = rwr->r_next; 615 } 616 } 617 } 618 /* 619 ** BUILDADDR -- build address from token vector. 620 ** 621 ** Parameters: 622 ** tv -- token vector. 623 ** a -- pointer to address descriptor to fill. 624 ** If NULL, one will be allocated. 625 ** 626 ** Returns: 627 ** NULL if there was an error. 628 ** 'a' otherwise. 629 ** 630 ** Side Effects: 631 ** fills in 'a' 632 */ 633 634 ADDRESS * 635 buildaddr(tv, a) 636 register char **tv; 637 register ADDRESS *a; 638 { 639 static char buf[MAXNAME]; 640 struct mailer **mp; 641 register struct mailer *m; 642 extern bool sameword(); 643 644 if (a == NULL) 645 a = (ADDRESS *) xalloc(sizeof *a); 646 clear((char *) a, sizeof *a); 647 648 /* figure out what net/mailer to use */ 649 if (**tv != CANONNET) 650 { 651 syserr("buildaddr: no net"); 652 return (NULL); 653 } 654 tv++; 655 if (sameword(*tv, "error")) 656 { 657 if (**++tv != CANONUSER) 658 syserr("buildaddr: error: no user"); 659 buf[0] = '\0'; 660 while (*++tv != NULL) 661 { 662 if (buf[0] != '\0') 663 (void) strcat(buf, " "); 664 (void) strcat(buf, *tv); 665 } 666 usrerr(buf); 667 return (NULL); 668 } 669 for (mp = Mailer; (m = *mp++) != NULL; ) 670 { 671 if (sameword(m->m_name, *tv)) 672 break; 673 } 674 if (m == NULL) 675 { 676 syserr("buildaddr: unknown net %s", *tv); 677 return (NULL); 678 } 679 a->q_mailer = m; 680 681 /* figure out what host (if any) */ 682 tv++; 683 if (!bitset(M_LOCAL, m->m_flags)) 684 { 685 if (**tv++ != CANONHOST) 686 { 687 syserr("buildaddr: no host"); 688 return (NULL); 689 } 690 buf[0] = '\0'; 691 while (*tv != NULL && **tv != CANONUSER) 692 (void) strcat(buf, *tv++); 693 a->q_host = newstr(buf); 694 } 695 else 696 a->q_host = NULL; 697 698 /* figure out the user */ 699 if (**tv != CANONUSER) 700 { 701 syserr("buildaddr: no user"); 702 return (NULL); 703 } 704 cataddr(++tv, buf, sizeof buf); 705 a->q_user = buf; 706 707 return (a); 708 } 709 /* 710 ** CATADDR -- concatenate pieces of addresses (putting in <LWSP> subs) 711 ** 712 ** Parameters: 713 ** pvp -- parameter vector to rebuild. 714 ** buf -- buffer to build the string into. 715 ** sz -- size of buf. 716 ** 717 ** Returns: 718 ** none. 719 ** 720 ** Side Effects: 721 ** Destroys buf. 722 */ 723 724 cataddr(pvp, buf, sz) 725 char **pvp; 726 char *buf; 727 register int sz; 728 { 729 bool oatomtok = FALSE; 730 bool natomtok = FALSE; 731 register int i; 732 register char *p; 733 734 p = buf; 735 sz--; 736 while (*pvp != NULL && (i = strlen(*pvp)) < sz) 737 { 738 natomtok = (toktype(**pvp) == ATOM); 739 if (oatomtok && natomtok) 740 *p++ = SPACESUB; 741 (void) strcpy(p, *pvp); 742 oatomtok = natomtok; 743 p += i; 744 sz -= i; 745 pvp++; 746 } 747 *p = '\0'; 748 } 749 /* 750 ** SAMEADDR -- Determine if two addresses are the same 751 ** 752 ** This is not just a straight comparison -- if the mailer doesn't 753 ** care about the host we just ignore it, etc. 754 ** 755 ** Parameters: 756 ** a, b -- pointers to the internal forms to compare. 757 ** wildflg -- if TRUE, 'a' may have no user specified, 758 ** in which case it is to match anything. 759 ** 760 ** Returns: 761 ** TRUE -- they represent the same mailbox. 762 ** FALSE -- they don't. 763 ** 764 ** Side Effects: 765 ** none. 766 */ 767 768 bool 769 sameaddr(a, b, wildflg) 770 register ADDRESS *a; 771 register ADDRESS *b; 772 bool wildflg; 773 { 774 /* if they don't have the same mailer, forget it */ 775 if (a->q_mailer != b->q_mailer) 776 return (FALSE); 777 778 /* if the user isn't the same, we can drop out */ 779 if ((!wildflg || a->q_user[0] != '\0') && strcmp(a->q_user, b->q_user) != 0) 780 return (FALSE); 781 782 /* if the mailer ignores hosts, we have succeeded! */ 783 if (bitset(M_LOCAL, a->q_mailer->m_flags)) 784 return (TRUE); 785 786 /* otherwise compare hosts (but be careful for NULL ptrs) */ 787 if (a->q_host == NULL || b->q_host == NULL) 788 return (FALSE); 789 if (strcmp(a->q_host, b->q_host) != 0) 790 return (FALSE); 791 792 return (TRUE); 793 } 794 /* 795 ** PRINTADDR -- print address (for debugging) 796 ** 797 ** Parameters: 798 ** a -- the address to print 799 ** follow -- follow the q_next chain. 800 ** 801 ** Returns: 802 ** none. 803 ** 804 ** Side Effects: 805 ** none. 806 */ 807 808 # ifdef DEBUG 809 810 printaddr(a, follow) 811 register ADDRESS *a; 812 bool follow; 813 { 814 bool first = TRUE; 815 816 while (a != NULL) 817 { 818 first = FALSE; 819 printf("%x=", a); 820 (void) fflush(stdout); 821 printf("%s: mailer %d (%s), host `%s', user `%s'\n", a->q_paddr, 822 a->q_mailer->m_mno, a->q_mailer->m_name, a->q_host, a->q_user); 823 printf("\tnext=%x, flags=%o, rmailer %d, alias %x\n", a->q_next, 824 a->q_flags, a->q_rmailer, a->q_alias); 825 printf("\thome=\"%s\", fullname=\"%s\"\n", a->q_home, a->q_fullname); 826 827 if (!follow) 828 return; 829 a = a->q_next; 830 } 831 if (first) 832 printf("[NULL]\n"); 833 } 834 835 # endif DEBUG 836 /* 837 ** REMOTENAME -- return the name relative to the current mailer 838 ** 839 ** Parameters: 840 ** name -- the name to translate. 841 ** force -- if set, forces rewriting even if the mailer 842 ** does not request it. Used for rewriting 843 ** sender addresses. 844 ** 845 ** Returns: 846 ** the text string representing this address relative to 847 ** the receiving mailer. 848 ** 849 ** Side Effects: 850 ** none. 851 ** 852 ** Warnings: 853 ** The text string returned is tucked away locally; 854 ** copy it if you intend to save it. 855 */ 856 857 char * 858 remotename(name, m, force) 859 char *name; 860 struct mailer *m; 861 bool force; 862 { 863 static char buf[MAXNAME]; 864 char lbuf[MAXNAME]; 865 extern char *macvalue(); 866 char *oldf = macvalue('f'); 867 char *oldg = macvalue('g'); 868 extern char **prescan(); 869 register char **pvp; 870 extern ADDRESS *buildaddr(); 871 extern char *crackaddr(); 872 char *fancy; 873 874 # ifdef DEBUG 875 if (tTd(12, 1)) 876 printf("remotename(%s)\n", name); 877 # endif DEBUG 878 879 /* 880 ** First put this address into canonical form. 881 ** First turn it into a macro. 882 ** Then run it through ruleset 4. 883 */ 884 885 /* save away the extraneous pretty stuff */ 886 fancy = crackaddr(name); 887 888 /* now run through ruleset four */ 889 pvp = prescan(name, '\0'); 890 if (pvp == NULL) 891 return (name); 892 rewrite(pvp, 4); 893 894 /* 895 ** See if this mailer wants the name to be rewritten. There are 896 ** many problems here, owing to the standards for doing replies. 897 ** In general, these names should only be rewritten if we are 898 ** sending to another host that runs sendmail. 899 */ 900 901 if (bitset(M_RELRCPT, m->m_flags) && !force) 902 { 903 /* 904 ** Do general rewriting of name. 905 ** This will also take care of doing global name 906 ** translation. 907 */ 908 909 rewrite(pvp, 1); 910 rewrite(pvp, 3); 911 912 /* make the name relative to the receiving mailer */ 913 cataddr(pvp, lbuf, sizeof lbuf); 914 define('f', lbuf); 915 expand(m->m_from, buf, &buf[sizeof buf - 1], CurEnv); 916 917 /* rewrite to get rid of garbage we added in the expand above */ 918 pvp = prescan(buf, '\0'); 919 if (pvp == NULL) 920 return (name); 921 rewrite(pvp, 2); 922 } 923 924 /* now add any comment info we had before back */ 925 cataddr(pvp, lbuf, sizeof lbuf); 926 define('g', lbuf); 927 expand(fancy, buf, &buf[sizeof buf - 1], CurEnv); 928 929 define('f', oldf); 930 define('g', oldg); 931 932 # ifdef DEBUG 933 if (tTd(12, 1)) 934 printf("remotename => `%s'\n", buf); 935 # endif DEBUG 936 return (buf); 937 } 938 /* 939 ** CANONNAME -- make name canonical 940 ** 941 ** This is used for SMTP and misc. printing. Given a print 942 ** address, it strips out comments, etc., and puts on exactly 943 ** one set of brackets. 944 ** 945 ** Parameters: 946 ** name -- the name to make canonical. 947 ** 948 ** Returns: 949 ** pointer to canonical name. 950 ** 951 ** Side Effects: 952 ** none. 953 ** 954 ** Warning: 955 ** result is saved in static buf; future calls will trash it. 956 */ 957 958 char * 959 canonname(name) 960 char *name; 961 { 962 static char nbuf[MAXNAME + 2]; 963 964 if (name[0] == '<') 965 return (name); 966 strcpy(nbuf, "<"); 967 strcat(nbuf, name); 968 strcat(nbuf, ">"); 969 return (nbuf); 970 } 971