1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)util.c 8.29 (Berkeley) 01/24/94"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 # include <sysexits.h> 15 /* 16 ** STRIPQUOTES -- Strip quotes & quote bits from a string. 17 ** 18 ** Runs through a string and strips off unquoted quote 19 ** characters and quote bits. This is done in place. 20 ** 21 ** Parameters: 22 ** s -- the string to strip. 23 ** 24 ** Returns: 25 ** none. 26 ** 27 ** Side Effects: 28 ** none. 29 ** 30 ** Called By: 31 ** deliver 32 */ 33 34 stripquotes(s) 35 char *s; 36 { 37 register char *p; 38 register char *q; 39 register char c; 40 41 if (s == NULL) 42 return; 43 44 p = q = s; 45 do 46 { 47 c = *p++; 48 if (c == '\\') 49 c = *p++; 50 else if (c == '"') 51 continue; 52 *q++ = c; 53 } while (c != '\0'); 54 } 55 /* 56 ** XALLOC -- Allocate memory and bitch wildly on failure. 57 ** 58 ** THIS IS A CLUDGE. This should be made to give a proper 59 ** error -- but after all, what can we do? 60 ** 61 ** Parameters: 62 ** sz -- size of area to allocate. 63 ** 64 ** Returns: 65 ** pointer to data region. 66 ** 67 ** Side Effects: 68 ** Memory is allocated. 69 */ 70 71 char * 72 xalloc(sz) 73 register int sz; 74 { 75 register char *p; 76 77 p = malloc((unsigned) sz); 78 if (p == NULL) 79 { 80 syserr("Out of memory!!"); 81 abort(); 82 /* exit(EX_UNAVAILABLE); */ 83 } 84 return (p); 85 } 86 /* 87 ** COPYPLIST -- copy list of pointers. 88 ** 89 ** This routine is the equivalent of newstr for lists of 90 ** pointers. 91 ** 92 ** Parameters: 93 ** list -- list of pointers to copy. 94 ** Must be NULL terminated. 95 ** copycont -- if TRUE, copy the contents of the vector 96 ** (which must be a string) also. 97 ** 98 ** Returns: 99 ** a copy of 'list'. 100 ** 101 ** Side Effects: 102 ** none. 103 */ 104 105 char ** 106 copyplist(list, copycont) 107 char **list; 108 bool copycont; 109 { 110 register char **vp; 111 register char **newvp; 112 113 for (vp = list; *vp != NULL; vp++) 114 continue; 115 116 vp++; 117 118 newvp = (char **) xalloc((int) (vp - list) * sizeof *vp); 119 bcopy((char *) list, (char *) newvp, (int) (vp - list) * sizeof *vp); 120 121 if (copycont) 122 { 123 for (vp = newvp; *vp != NULL; vp++) 124 *vp = newstr(*vp); 125 } 126 127 return (newvp); 128 } 129 /* 130 ** COPYQUEUE -- copy address queue. 131 ** 132 ** This routine is the equivalent of newstr for address queues 133 ** addresses marked with QDONTSEND aren't copied 134 ** 135 ** Parameters: 136 ** addr -- list of address structures to copy. 137 ** 138 ** Returns: 139 ** a copy of 'addr'. 140 ** 141 ** Side Effects: 142 ** none. 143 */ 144 145 ADDRESS * 146 copyqueue(addr) 147 ADDRESS *addr; 148 { 149 register ADDRESS *newaddr; 150 ADDRESS *ret; 151 register ADDRESS **tail = &ret; 152 153 while (addr != NULL) 154 { 155 if (!bitset(QDONTSEND, addr->q_flags)) 156 { 157 newaddr = (ADDRESS *) xalloc(sizeof(ADDRESS)); 158 STRUCTCOPY(*addr, *newaddr); 159 *tail = newaddr; 160 tail = &newaddr->q_next; 161 } 162 addr = addr->q_next; 163 } 164 *tail = NULL; 165 166 return ret; 167 } 168 /* 169 ** PRINTAV -- print argument vector. 170 ** 171 ** Parameters: 172 ** av -- argument vector. 173 ** 174 ** Returns: 175 ** none. 176 ** 177 ** Side Effects: 178 ** prints av. 179 */ 180 181 printav(av) 182 register char **av; 183 { 184 while (*av != NULL) 185 { 186 if (tTd(0, 44)) 187 printf("\n\t%08x=", *av); 188 else 189 (void) putchar(' '); 190 xputs(*av++); 191 } 192 (void) putchar('\n'); 193 } 194 /* 195 ** LOWER -- turn letter into lower case. 196 ** 197 ** Parameters: 198 ** c -- character to turn into lower case. 199 ** 200 ** Returns: 201 ** c, in lower case. 202 ** 203 ** Side Effects: 204 ** none. 205 */ 206 207 char 208 lower(c) 209 register char c; 210 { 211 return((isascii(c) && isupper(c)) ? tolower(c) : c); 212 } 213 /* 214 ** XPUTS -- put string doing control escapes. 215 ** 216 ** Parameters: 217 ** s -- string to put. 218 ** 219 ** Returns: 220 ** none. 221 ** 222 ** Side Effects: 223 ** output to stdout 224 */ 225 226 xputs(s) 227 register char *s; 228 { 229 register int c; 230 register struct metamac *mp; 231 extern struct metamac MetaMacros[]; 232 233 if (s == NULL) 234 { 235 printf("<null>"); 236 return; 237 } 238 while ((c = (*s++ & 0377)) != '\0') 239 { 240 if (!isascii(c)) 241 { 242 if (c == MATCHREPL || c == MACROEXPAND) 243 { 244 putchar('$'); 245 continue; 246 } 247 for (mp = MetaMacros; mp->metaname != '\0'; mp++) 248 { 249 if ((mp->metaval & 0377) == c) 250 { 251 printf("$%c", mp->metaname); 252 break; 253 } 254 } 255 if (mp->metaname != '\0') 256 continue; 257 (void) putchar('\\'); 258 c &= 0177; 259 } 260 if (isprint(c)) 261 { 262 putchar(c); 263 continue; 264 } 265 266 /* wasn't a meta-macro -- find another way to print it */ 267 switch (c) 268 { 269 case '\0': 270 continue; 271 272 case '\n': 273 c = 'n'; 274 break; 275 276 case '\r': 277 c = 'r'; 278 break; 279 280 case '\t': 281 c = 't'; 282 break; 283 284 default: 285 (void) putchar('^'); 286 (void) putchar(c ^ 0100); 287 continue; 288 } 289 } 290 (void) fflush(stdout); 291 } 292 /* 293 ** MAKELOWER -- Translate a line into lower case 294 ** 295 ** Parameters: 296 ** p -- the string to translate. If NULL, return is 297 ** immediate. 298 ** 299 ** Returns: 300 ** none. 301 ** 302 ** Side Effects: 303 ** String pointed to by p is translated to lower case. 304 ** 305 ** Called By: 306 ** parse 307 */ 308 309 makelower(p) 310 register char *p; 311 { 312 register char c; 313 314 if (p == NULL) 315 return; 316 for (; (c = *p) != '\0'; p++) 317 if (isascii(c) && isupper(c)) 318 *p = tolower(c); 319 } 320 /* 321 ** BUILDFNAME -- build full name from gecos style entry. 322 ** 323 ** This routine interprets the strange entry that would appear 324 ** in the GECOS field of the password file. 325 ** 326 ** Parameters: 327 ** p -- name to build. 328 ** login -- the login name of this user (for &). 329 ** buf -- place to put the result. 330 ** 331 ** Returns: 332 ** none. 333 ** 334 ** Side Effects: 335 ** none. 336 */ 337 338 buildfname(gecos, login, buf) 339 register char *gecos; 340 char *login; 341 char *buf; 342 { 343 register char *p; 344 register char *bp = buf; 345 int l; 346 347 if (*gecos == '*') 348 gecos++; 349 350 /* find length of final string */ 351 l = 0; 352 for (p = gecos; *p != '\0' && *p != ',' && *p != ';' && *p != '%'; p++) 353 { 354 if (*p == '&') 355 l += strlen(login); 356 else 357 l++; 358 } 359 360 /* now fill in buf */ 361 for (p = gecos; *p != '\0' && *p != ',' && *p != ';' && *p != '%'; p++) 362 { 363 if (*p == '&') 364 { 365 (void) strcpy(bp, login); 366 *bp = toupper(*bp); 367 while (*bp != '\0') 368 bp++; 369 } 370 else 371 *bp++ = *p; 372 } 373 *bp = '\0'; 374 } 375 /* 376 ** SAFEFILE -- return true if a file exists and is safe for a user. 377 ** 378 ** Parameters: 379 ** fn -- filename to check. 380 ** uid -- user id to compare against. 381 ** gid -- group id to compare against. 382 ** uname -- user name to compare against (used for group 383 ** sets). 384 ** flags -- modifiers: 385 ** SFF_MUSTOWN -- "uid" must own this file. 386 ** SFF_NOSLINK -- file cannot be a symbolic link. 387 ** mode -- mode bits that must match. 388 ** 389 ** Returns: 390 ** 0 if fn exists, is owned by uid, and matches mode. 391 ** An errno otherwise. The actual errno is cleared. 392 ** 393 ** Side Effects: 394 ** none. 395 */ 396 397 #include <grp.h> 398 399 #ifndef S_IXOTH 400 # define S_IXOTH (S_IEXEC >> 6) 401 #endif 402 403 #ifndef S_IXGRP 404 # define S_IXGRP (S_IEXEC >> 3) 405 #endif 406 407 #ifndef S_IXUSR 408 # define S_IXUSR (S_IEXEC) 409 #endif 410 411 int 412 safefile(fn, uid, gid, uname, flags, mode) 413 char *fn; 414 uid_t uid; 415 gid_t gid; 416 char *uname; 417 int flags; 418 int mode; 419 { 420 register char *p; 421 register struct group *gr = NULL; 422 struct stat stbuf; 423 424 if (tTd(54, 4)) 425 printf("safefile(%s, uid=%d, gid=%d, flags=%x, mode=%o):\n", 426 fn, uid, gid, flags, mode); 427 errno = 0; 428 429 for (p = fn; (p = strchr(++p, '/')) != NULL; *p = '/') 430 { 431 *p = '\0'; 432 if (stat(fn, &stbuf) < 0) 433 break; 434 if (uid == 0 && !bitset(SFF_ROOTOK, flags)) 435 { 436 if (bitset(S_IXOTH, stbuf.st_mode)) 437 continue; 438 break; 439 } 440 if (stbuf.st_uid == uid && bitset(S_IXUSR, stbuf.st_mode)) 441 continue; 442 if (stbuf.st_gid == gid && bitset(S_IXGRP, stbuf.st_mode)) 443 continue; 444 #ifndef NO_GROUP_SET 445 if (uname != NULL && 446 ((gr != NULL && gr->gr_gid == stbuf.st_gid) || 447 (gr = getgrgid(stbuf.st_gid)) != NULL)) 448 { 449 register char **gp; 450 451 for (gp = gr->gr_mem; *gp != NULL; gp++) 452 if (strcmp(*gp, uname) == 0) 453 break; 454 if (*gp != NULL && bitset(S_IXGRP, stbuf.st_mode)) 455 continue; 456 } 457 #endif 458 if (!bitset(S_IXOTH, stbuf.st_mode)) 459 break; 460 } 461 if (p != NULL) 462 { 463 int ret = errno; 464 465 if (ret == 0) 466 ret = EACCES; 467 if (tTd(54, 4)) 468 printf("\t[dir %s] %s\n", fn, errstring(ret)); 469 *p = '/'; 470 return ret; 471 } 472 473 #ifdef HASLSTAT 474 if ((bitset(SFF_NOSLINK, flags) ? lstat(fn, &stbuf) 475 : stat(fn, &stbuf)) < 0) 476 #else 477 if (stat(fn, &stbuf) < 0) 478 #endif 479 { 480 int ret = errno; 481 482 if (tTd(54, 4)) 483 printf("\t%s\n", errstring(ret)); 484 485 errno = 0; 486 return ret; 487 } 488 489 #ifdef S_ISLNK 490 if (bitset(SFF_NOSLINK, flags) && S_ISLNK(stbuf.st_mode)) 491 { 492 if (tTd(54, 4)) 493 printf("\t[slink mode %o]\tEPERM\n", stbuf.st_mode); 494 return EPERM; 495 } 496 #endif 497 498 if (uid == 0 && !bitset(SFF_ROOTOK, flags)) 499 mode >>= 6; 500 else if (stbuf.st_uid != uid) 501 { 502 mode >>= 3; 503 if (stbuf.st_gid == gid) 504 ; 505 #ifndef NO_GROUP_SET 506 else if (uname != NULL && 507 ((gr != NULL && gr->gr_gid == stbuf.st_gid) || 508 (gr = getgrgid(stbuf.st_gid)) != NULL)) 509 { 510 register char **gp; 511 512 for (gp = gr->gr_mem; *gp != NULL; gp++) 513 if (strcmp(*gp, uname) == 0) 514 break; 515 if (*gp == NULL) 516 mode >>= 3; 517 } 518 #endif 519 else 520 mode >>= 3; 521 } 522 if (tTd(54, 4)) 523 printf("\t[uid %d, stat %o, mode %o] ", 524 stbuf.st_uid, stbuf.st_mode, mode); 525 if ((stbuf.st_uid == uid || stbuf.st_uid == 0 || 526 !bitset(SFF_MUSTOWN, flags)) && 527 (stbuf.st_mode & mode) == mode) 528 { 529 if (tTd(54, 4)) 530 printf("\tOK\n"); 531 return 0; 532 } 533 if (tTd(54, 4)) 534 printf("\tEACCES\n"); 535 return EACCES; 536 } 537 /* 538 ** FIXCRLF -- fix <CR><LF> in line. 539 ** 540 ** Looks for the <CR><LF> combination and turns it into the 541 ** UNIX canonical <NL> character. It only takes one line, 542 ** i.e., it is assumed that the first <NL> found is the end 543 ** of the line. 544 ** 545 ** Parameters: 546 ** line -- the line to fix. 547 ** stripnl -- if true, strip the newline also. 548 ** 549 ** Returns: 550 ** none. 551 ** 552 ** Side Effects: 553 ** line is changed in place. 554 */ 555 556 fixcrlf(line, stripnl) 557 char *line; 558 bool stripnl; 559 { 560 register char *p; 561 562 p = strchr(line, '\n'); 563 if (p == NULL) 564 return; 565 if (p > line && p[-1] == '\r') 566 p--; 567 if (!stripnl) 568 *p++ = '\n'; 569 *p = '\0'; 570 } 571 /* 572 ** DFOPEN -- determined file open 573 ** 574 ** This routine has the semantics of fopen, except that it will 575 ** keep trying a few times to make this happen. The idea is that 576 ** on very loaded systems, we may run out of resources (inodes, 577 ** whatever), so this tries to get around it. 578 */ 579 580 #ifndef O_ACCMODE 581 # define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) 582 #endif 583 584 struct omodes 585 { 586 int mask; 587 int mode; 588 char *farg; 589 } OpenModes[] = 590 { 591 O_ACCMODE, O_RDONLY, "r", 592 O_ACCMODE|O_APPEND, O_WRONLY, "w", 593 O_ACCMODE|O_APPEND, O_WRONLY|O_APPEND, "a", 594 O_TRUNC, 0, "w+", 595 O_APPEND, O_APPEND, "a+", 596 0, 0, "r+", 597 }; 598 599 FILE * 600 dfopen(filename, omode, cmode) 601 char *filename; 602 int omode; 603 int cmode; 604 { 605 register int tries; 606 int fd; 607 register struct omodes *om; 608 struct stat st; 609 610 for (om = OpenModes; om->mask != 0; om++) 611 if ((omode & om->mask) == om->mode) 612 break; 613 614 for (tries = 0; tries < 10; tries++) 615 { 616 sleep((unsigned) (10 * tries)); 617 errno = 0; 618 fd = open(filename, omode, cmode); 619 if (fd >= 0) 620 break; 621 if (errno != ENFILE && errno != EINTR) 622 break; 623 } 624 if (fd >= 0 && fstat(fd, &st) >= 0 && S_ISREG(st.st_mode)) 625 { 626 int locktype; 627 628 /* lock the file to avoid accidental conflicts */ 629 if ((omode & O_ACCMODE) != O_RDONLY) 630 locktype = LOCK_EX; 631 else 632 locktype = LOCK_SH; 633 (void) lockfile(fd, filename, NULL, locktype); 634 errno = 0; 635 } 636 if (fd < 0) 637 return NULL; 638 else 639 return fdopen(fd, om->farg); 640 } 641 /* 642 ** PUTLINE -- put a line like fputs obeying SMTP conventions 643 ** 644 ** This routine always guarantees outputing a newline (or CRLF, 645 ** as appropriate) at the end of the string. 646 ** 647 ** Parameters: 648 ** l -- line to put. 649 ** mci -- the mailer connection information. 650 ** 651 ** Returns: 652 ** none 653 ** 654 ** Side Effects: 655 ** output of l to fp. 656 */ 657 658 putline(l, mci) 659 register char *l; 660 register MCI *mci; 661 { 662 register char *p; 663 register char svchar; 664 665 /* strip out 0200 bits -- these can look like TELNET protocol */ 666 if (bitset(MCIF_7BIT, mci->mci_flags)) 667 { 668 for (p = l; (svchar = *p) != '\0'; ++p) 669 if (bitset(0200, svchar)) 670 *p = svchar &~ 0200; 671 } 672 673 do 674 { 675 /* find the end of the line */ 676 p = strchr(l, '\n'); 677 if (p == NULL) 678 p = &l[strlen(l)]; 679 680 if (TrafficLogFile != NULL) 681 fprintf(TrafficLogFile, "%05d >>> ", getpid()); 682 683 /* check for line overflow */ 684 while (mci->mci_mailer->m_linelimit > 0 && 685 (p - l) > mci->mci_mailer->m_linelimit) 686 { 687 register char *q = &l[mci->mci_mailer->m_linelimit - 1]; 688 689 svchar = *q; 690 *q = '\0'; 691 if (l[0] == '.' && bitnset(M_XDOT, mci->mci_mailer->m_flags)) 692 { 693 (void) putc('.', mci->mci_out); 694 if (TrafficLogFile != NULL) 695 (void) putc('.', TrafficLogFile); 696 } 697 fputs(l, mci->mci_out); 698 (void) putc('!', mci->mci_out); 699 fputs(mci->mci_mailer->m_eol, mci->mci_out); 700 if (TrafficLogFile != NULL) 701 fprintf(TrafficLogFile, "%s!\n%05d >>> ", 702 l, getpid()); 703 *q = svchar; 704 l = q; 705 } 706 707 /* output last part */ 708 if (l[0] == '.' && bitnset(M_XDOT, mci->mci_mailer->m_flags)) 709 { 710 (void) putc('.', mci->mci_out); 711 if (TrafficLogFile != NULL) 712 (void) putc('.', TrafficLogFile); 713 } 714 if (TrafficLogFile != NULL) 715 fprintf(TrafficLogFile, "%.*s\n", p - l, l); 716 for ( ; l < p; ++l) 717 (void) putc(*l, mci->mci_out); 718 fputs(mci->mci_mailer->m_eol, mci->mci_out); 719 if (*l == '\n') 720 ++l; 721 } while (l[0] != '\0'); 722 } 723 /* 724 ** XUNLINK -- unlink a file, doing logging as appropriate. 725 ** 726 ** Parameters: 727 ** f -- name of file to unlink. 728 ** 729 ** Returns: 730 ** none. 731 ** 732 ** Side Effects: 733 ** f is unlinked. 734 */ 735 736 xunlink(f) 737 char *f; 738 { 739 register int i; 740 741 # ifdef LOG 742 if (LogLevel > 98) 743 syslog(LOG_DEBUG, "%s: unlink %s", CurEnv->e_id, f); 744 # endif /* LOG */ 745 746 i = unlink(f); 747 # ifdef LOG 748 if (i < 0 && LogLevel > 97) 749 syslog(LOG_DEBUG, "%s: unlink-fail %d", f, errno); 750 # endif /* LOG */ 751 } 752 /* 753 ** XFCLOSE -- close a file, doing logging as appropriate. 754 ** 755 ** Parameters: 756 ** fp -- file pointer for the file to close 757 ** a, b -- miscellaneous crud to print for debugging 758 ** 759 ** Returns: 760 ** none. 761 ** 762 ** Side Effects: 763 ** fp is closed. 764 */ 765 766 xfclose(fp, a, b) 767 FILE *fp; 768 char *a, *b; 769 { 770 if (tTd(53, 99)) 771 printf("xfclose(%x) %s %s\n", fp, a, b); 772 #ifdef XDEBUG 773 if (fileno(fp) == 1) 774 syserr("xfclose(%s %s): fd = 1", a, b); 775 #endif 776 if (fclose(fp) < 0 && tTd(53, 99)) 777 printf("xfclose FAILURE: %s\n", errstring(errno)); 778 } 779 /* 780 ** SFGETS -- "safe" fgets -- times out and ignores random interrupts. 781 ** 782 ** Parameters: 783 ** buf -- place to put the input line. 784 ** siz -- size of buf. 785 ** fp -- file to read from. 786 ** timeout -- the timeout before error occurs. 787 ** during -- what we are trying to read (for error messages). 788 ** 789 ** Returns: 790 ** NULL on error (including timeout). This will also leave 791 ** buf containing a null string. 792 ** buf otherwise. 793 ** 794 ** Side Effects: 795 ** none. 796 */ 797 798 static jmp_buf CtxReadTimeout; 799 static int readtimeout(); 800 801 char * 802 sfgets(buf, siz, fp, timeout, during) 803 char *buf; 804 int siz; 805 FILE *fp; 806 time_t timeout; 807 char *during; 808 { 809 register EVENT *ev = NULL; 810 register char *p; 811 812 /* set the timeout */ 813 if (timeout != 0) 814 { 815 if (setjmp(CtxReadTimeout) != 0) 816 { 817 # ifdef LOG 818 syslog(LOG_NOTICE, 819 "timeout waiting for input from %s during %s\n", 820 CurHostName? CurHostName: "local", during); 821 # endif 822 errno = 0; 823 usrerr("451 timeout waiting for input during %s", 824 during); 825 buf[0] = '\0'; 826 #ifdef XDEBUG 827 checkfd012(during); 828 #endif 829 return (NULL); 830 } 831 ev = setevent(timeout, readtimeout, 0); 832 } 833 834 /* try to read */ 835 p = NULL; 836 while (!feof(fp) && !ferror(fp)) 837 { 838 errno = 0; 839 p = fgets(buf, siz, fp); 840 if (p != NULL || errno != EINTR) 841 break; 842 clearerr(fp); 843 } 844 845 /* clear the event if it has not sprung */ 846 clrevent(ev); 847 848 /* clean up the books and exit */ 849 LineNumber++; 850 if (p == NULL) 851 { 852 buf[0] = '\0'; 853 if (TrafficLogFile != NULL) 854 fprintf(TrafficLogFile, "%05d <<< [EOF]\n", getpid()); 855 return (NULL); 856 } 857 if (TrafficLogFile != NULL) 858 fprintf(TrafficLogFile, "%05d <<< %s", getpid(), buf); 859 if (SevenBit) 860 for (p = buf; *p != '\0'; p++) 861 *p &= ~0200; 862 return (buf); 863 } 864 865 static 866 readtimeout() 867 { 868 longjmp(CtxReadTimeout, 1); 869 } 870 /* 871 ** FGETFOLDED -- like fgets, but know about folded lines. 872 ** 873 ** Parameters: 874 ** buf -- place to put result. 875 ** n -- bytes available. 876 ** f -- file to read from. 877 ** 878 ** Returns: 879 ** input line(s) on success, NULL on error or EOF. 880 ** This will normally be buf -- unless the line is too 881 ** long, when it will be xalloc()ed. 882 ** 883 ** Side Effects: 884 ** buf gets lines from f, with continuation lines (lines 885 ** with leading white space) appended. CRLF's are mapped 886 ** into single newlines. Any trailing NL is stripped. 887 */ 888 889 char * 890 fgetfolded(buf, n, f) 891 char *buf; 892 register int n; 893 FILE *f; 894 { 895 register char *p = buf; 896 char *bp = buf; 897 register int i; 898 899 n--; 900 while ((i = getc(f)) != EOF) 901 { 902 if (i == '\r') 903 { 904 i = getc(f); 905 if (i != '\n') 906 { 907 if (i != EOF) 908 (void) ungetc(i, f); 909 i = '\r'; 910 } 911 } 912 if (--n <= 0) 913 { 914 /* allocate new space */ 915 char *nbp; 916 int nn; 917 918 nn = (p - bp); 919 if (nn < MEMCHUNKSIZE) 920 nn *= 2; 921 else 922 nn += MEMCHUNKSIZE; 923 nbp = xalloc(nn); 924 bcopy(bp, nbp, p - bp); 925 p = &nbp[p - bp]; 926 if (bp != buf) 927 free(bp); 928 bp = nbp; 929 n = nn - (p - bp); 930 } 931 *p++ = i; 932 if (i == '\n') 933 { 934 LineNumber++; 935 i = getc(f); 936 if (i != EOF) 937 (void) ungetc(i, f); 938 if (i != ' ' && i != '\t') 939 break; 940 } 941 } 942 if (p == bp) 943 return (NULL); 944 *--p = '\0'; 945 return (bp); 946 } 947 /* 948 ** CURTIME -- return current time. 949 ** 950 ** Parameters: 951 ** none. 952 ** 953 ** Returns: 954 ** the current time. 955 ** 956 ** Side Effects: 957 ** none. 958 */ 959 960 time_t 961 curtime() 962 { 963 auto time_t t; 964 965 (void) time(&t); 966 return (t); 967 } 968 /* 969 ** ATOBOOL -- convert a string representation to boolean. 970 ** 971 ** Defaults to "TRUE" 972 ** 973 ** Parameters: 974 ** s -- string to convert. Takes "tTyY" as true, 975 ** others as false. 976 ** 977 ** Returns: 978 ** A boolean representation of the string. 979 ** 980 ** Side Effects: 981 ** none. 982 */ 983 984 bool 985 atobool(s) 986 register char *s; 987 { 988 if (s == NULL || *s == '\0' || strchr("tTyY", *s) != NULL) 989 return (TRUE); 990 return (FALSE); 991 } 992 /* 993 ** ATOOCT -- convert a string representation to octal. 994 ** 995 ** Parameters: 996 ** s -- string to convert. 997 ** 998 ** Returns: 999 ** An integer representing the string interpreted as an 1000 ** octal number. 1001 ** 1002 ** Side Effects: 1003 ** none. 1004 */ 1005 1006 atooct(s) 1007 register char *s; 1008 { 1009 register int i = 0; 1010 1011 while (*s >= '0' && *s <= '7') 1012 i = (i << 3) | (*s++ - '0'); 1013 return (i); 1014 } 1015 /* 1016 ** WAITFOR -- wait for a particular process id. 1017 ** 1018 ** Parameters: 1019 ** pid -- process id to wait for. 1020 ** 1021 ** Returns: 1022 ** status of pid. 1023 ** -1 if pid never shows up. 1024 ** 1025 ** Side Effects: 1026 ** none. 1027 */ 1028 1029 int 1030 waitfor(pid) 1031 int pid; 1032 { 1033 #ifdef WAITUNION 1034 union wait st; 1035 #else 1036 auto int st; 1037 #endif 1038 int i; 1039 1040 do 1041 { 1042 errno = 0; 1043 i = wait(&st); 1044 } while ((i >= 0 || errno == EINTR) && i != pid); 1045 if (i < 0) 1046 return -1; 1047 #ifdef WAITUNION 1048 return st.w_status; 1049 #else 1050 return st; 1051 #endif 1052 } 1053 /* 1054 ** BITINTERSECT -- tell if two bitmaps intersect 1055 ** 1056 ** Parameters: 1057 ** a, b -- the bitmaps in question 1058 ** 1059 ** Returns: 1060 ** TRUE if they have a non-null intersection 1061 ** FALSE otherwise 1062 ** 1063 ** Side Effects: 1064 ** none. 1065 */ 1066 1067 bool 1068 bitintersect(a, b) 1069 BITMAP a; 1070 BITMAP b; 1071 { 1072 int i; 1073 1074 for (i = BITMAPBYTES / sizeof (int); --i >= 0; ) 1075 if ((a[i] & b[i]) != 0) 1076 return (TRUE); 1077 return (FALSE); 1078 } 1079 /* 1080 ** BITZEROP -- tell if a bitmap is all zero 1081 ** 1082 ** Parameters: 1083 ** map -- the bit map to check 1084 ** 1085 ** Returns: 1086 ** TRUE if map is all zero. 1087 ** FALSE if there are any bits set in map. 1088 ** 1089 ** Side Effects: 1090 ** none. 1091 */ 1092 1093 bool 1094 bitzerop(map) 1095 BITMAP map; 1096 { 1097 int i; 1098 1099 for (i = BITMAPBYTES / sizeof (int); --i >= 0; ) 1100 if (map[i] != 0) 1101 return (FALSE); 1102 return (TRUE); 1103 } 1104 /* 1105 ** STRCONTAINEDIN -- tell if one string is contained in another 1106 ** 1107 ** Parameters: 1108 ** a -- possible substring. 1109 ** b -- possible superstring. 1110 ** 1111 ** Returns: 1112 ** TRUE if a is contained in b. 1113 ** FALSE otherwise. 1114 */ 1115 1116 bool 1117 strcontainedin(a, b) 1118 register char *a; 1119 register char *b; 1120 { 1121 int la; 1122 int lb; 1123 int c; 1124 1125 la = strlen(a); 1126 lb = strlen(b); 1127 c = *a; 1128 if (isascii(c) && isupper(c)) 1129 c = tolower(c); 1130 for (; lb-- >= la; b++) 1131 { 1132 if (*b != c && isascii(*b) && isupper(*b) && tolower(*b) != c) 1133 continue; 1134 if (strncasecmp(a, b, la) == 0) 1135 return TRUE; 1136 } 1137 return FALSE; 1138 } 1139 /* 1140 ** CHECKFD012 -- check low numbered file descriptors 1141 ** 1142 ** File descriptors 0, 1, and 2 should be open at all times. 1143 ** This routine verifies that, and fixes it if not true. 1144 ** 1145 ** Parameters: 1146 ** where -- a tag printed if the assertion failed 1147 ** 1148 ** Returns: 1149 ** none 1150 */ 1151 1152 checkfd012(where) 1153 char *where; 1154 { 1155 #ifdef XDEBUG 1156 register int i; 1157 struct stat stbuf; 1158 1159 for (i = 0; i < 3; i++) 1160 { 1161 if (fstat(i, &stbuf) < 0 && errno != EOPNOTSUPP) 1162 { 1163 /* oops.... */ 1164 int fd; 1165 1166 syserr("%s: fd %d not open", where, i); 1167 fd = open("/dev/null", i == 0 ? O_RDONLY : O_WRONLY, 0666); 1168 if (fd != i) 1169 { 1170 (void) dup2(fd, i); 1171 (void) close(fd); 1172 } 1173 } 1174 } 1175 #endif /* XDEBUG */ 1176 } 1177 /* 1178 ** PRINTOPENFDS -- print the open file descriptors (for debugging) 1179 ** 1180 ** Parameters: 1181 ** logit -- if set, send output to syslog; otherwise 1182 ** print for debugging. 1183 ** 1184 ** Returns: 1185 ** none. 1186 */ 1187 1188 #include <netdb.h> 1189 #include <arpa/inet.h> 1190 1191 printopenfds(logit) 1192 bool logit; 1193 { 1194 register int fd; 1195 extern int DtableSize; 1196 1197 for (fd = 0; fd < DtableSize; fd++) 1198 dumpfd(fd, FALSE, logit); 1199 } 1200 /* 1201 ** DUMPFD -- dump a file descriptor 1202 ** 1203 ** Parameters: 1204 ** fd -- the file descriptor to dump. 1205 ** printclosed -- if set, print a notification even if 1206 ** it is closed; otherwise print nothing. 1207 ** logit -- if set, send output to syslog instead of stdout. 1208 */ 1209 1210 dumpfd(fd, printclosed, logit) 1211 int fd; 1212 bool printclosed; 1213 bool logit; 1214 { 1215 register struct hostent *hp; 1216 register char *p; 1217 struct sockaddr_in sin; 1218 auto int slen; 1219 struct stat st; 1220 char buf[200]; 1221 1222 p = buf; 1223 sprintf(p, "%3d: ", fd); 1224 p += strlen(p); 1225 1226 if (fstat(fd, &st) < 0) 1227 { 1228 if (printclosed || errno != EBADF) 1229 { 1230 sprintf(p, "CANNOT STAT (%s)", errstring(errno)); 1231 goto printit; 1232 } 1233 return; 1234 } 1235 1236 slen = fcntl(fd, F_GETFL, NULL); 1237 if (slen != -1) 1238 { 1239 sprintf(p, "fl=0x%x, ", slen); 1240 p += strlen(p); 1241 } 1242 1243 sprintf(p, "mode=%o: ", st.st_mode); 1244 p += strlen(p); 1245 switch (st.st_mode & S_IFMT) 1246 { 1247 #ifdef S_IFSOCK 1248 case S_IFSOCK: 1249 sprintf(p, "SOCK "); 1250 p += strlen(p); 1251 slen = sizeof sin; 1252 if (getsockname(fd, (struct sockaddr *) &sin, &slen) < 0) 1253 sprintf(p, "(badsock)"); 1254 else 1255 { 1256 hp = gethostbyaddr((char *) &sin.sin_addr, slen, AF_INET); 1257 sprintf(p, "%s/%d", hp == NULL ? inet_ntoa(sin.sin_addr) 1258 : hp->h_name, ntohs(sin.sin_port)); 1259 } 1260 p += strlen(p); 1261 sprintf(p, "->"); 1262 p += strlen(p); 1263 slen = sizeof sin; 1264 if (getpeername(fd, (struct sockaddr *) &sin, &slen) < 0) 1265 sprintf(p, "(badsock)"); 1266 else 1267 { 1268 hp = gethostbyaddr((char *) &sin.sin_addr, slen, AF_INET); 1269 sprintf(p, "%s/%d", hp == NULL ? inet_ntoa(sin.sin_addr) 1270 : hp->h_name, ntohs(sin.sin_port)); 1271 } 1272 break; 1273 #endif 1274 1275 case S_IFCHR: 1276 sprintf(p, "CHR: "); 1277 p += strlen(p); 1278 goto defprint; 1279 1280 case S_IFBLK: 1281 sprintf(p, "BLK: "); 1282 p += strlen(p); 1283 goto defprint; 1284 1285 #ifdef S_IFIFO 1286 case S_IFIFO: 1287 sprintf(p, "FIFO: "); 1288 p += strlen(p); 1289 goto defprint; 1290 #endif 1291 1292 #ifdef S_IFDIR 1293 case S_IFDIR: 1294 sprintf(p, "DIR: "); 1295 p += strlen(p); 1296 goto defprint; 1297 #endif 1298 1299 #ifdef S_IFLNK 1300 case S_IFLNK: 1301 sprintf(p, "LNK: "); 1302 p += strlen(p); 1303 goto defprint; 1304 #endif 1305 1306 default: 1307 defprint: 1308 sprintf(p, "dev=%d/%d, ino=%d, nlink=%d, u/gid=%d/%d, size=%ld", 1309 major(st.st_dev), minor(st.st_dev), st.st_ino, 1310 st.st_nlink, st.st_uid, st.st_gid, st.st_size); 1311 break; 1312 } 1313 1314 printit: 1315 if (logit) 1316 syslog(LOG_DEBUG, "%s", buf); 1317 else 1318 printf("%s\n", buf); 1319 } 1320 /* 1321 ** SHORTENSTRING -- return short version of a string 1322 ** 1323 ** If the string is already short, just return it. If it is too 1324 ** long, return the head and tail of the string. 1325 ** 1326 ** Parameters: 1327 ** s -- the string to shorten. 1328 ** m -- the max length of the string. 1329 ** 1330 ** Returns: 1331 ** Either s or a short version of s. 1332 */ 1333 1334 #ifndef MAXSHORTSTR 1335 # define MAXSHORTSTR 203 1336 #endif 1337 1338 char * 1339 shortenstring(s, m) 1340 register char *s; 1341 int m; 1342 { 1343 int l; 1344 static char buf[MAXSHORTSTR + 1]; 1345 1346 l = strlen(s); 1347 if (l < m) 1348 return s; 1349 if (m > MAXSHORTSTR) 1350 m = MAXSHORTSTR; 1351 else if (m < 10) 1352 { 1353 if (m < 5) 1354 { 1355 strncpy(buf, s, m); 1356 buf[m] = '\0'; 1357 return buf; 1358 } 1359 strncpy(buf, s, m - 3); 1360 strcpy(buf + m - 3, "..."); 1361 return buf; 1362 } 1363 m = (m - 3) / 2; 1364 strncpy(buf, s, m); 1365 strcpy(buf + m, "..."); 1366 strcpy(buf + m + 3, s + l - m); 1367 return buf; 1368 } 1369