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[] = "@(#)conf.c 8.61 (Berkeley) 01/05/94"; 11 #endif /* not lint */ 12 13 # include "sendmail.h" 14 # include "pathnames.h" 15 # include <sys/ioctl.h> 16 # include <sys/param.h> 17 # include <netdb.h> 18 # include <pwd.h> 19 20 /* 21 ** CONF.C -- Sendmail Configuration Tables. 22 ** 23 ** Defines the configuration of this installation. 24 ** 25 ** Configuration Variables: 26 ** HdrInfo -- a table describing well-known header fields. 27 ** Each entry has the field name and some flags, 28 ** which are described in sendmail.h. 29 ** 30 ** Notes: 31 ** I have tried to put almost all the reasonable 32 ** configuration information into the configuration 33 ** file read at runtime. My intent is that anything 34 ** here is a function of the version of UNIX you 35 ** are running, or is really static -- for example 36 ** the headers are a superset of widely used 37 ** protocols. If you find yourself playing with 38 ** this file too much, you may be making a mistake! 39 */ 40 41 42 43 44 /* 45 ** Header info table 46 ** Final (null) entry contains the flags used for any other field. 47 ** 48 ** Not all of these are actually handled specially by sendmail 49 ** at this time. They are included as placeholders, to let 50 ** you know that "someday" I intend to have sendmail do 51 ** something with them. 52 */ 53 54 struct hdrinfo HdrInfo[] = 55 { 56 /* originator fields, most to least significant */ 57 "resent-sender", H_FROM|H_RESENT, 58 "resent-from", H_FROM|H_RESENT, 59 "resent-reply-to", H_FROM|H_RESENT, 60 "sender", H_FROM, 61 "from", H_FROM, 62 "reply-to", H_FROM, 63 "full-name", H_ACHECK, 64 "return-receipt-to", H_FROM|H_RECEIPTTO, 65 "errors-to", H_FROM|H_ERRORSTO, 66 67 /* destination fields */ 68 "to", H_RCPT, 69 "resent-to", H_RCPT|H_RESENT, 70 "cc", H_RCPT, 71 "resent-cc", H_RCPT|H_RESENT, 72 "bcc", H_RCPT|H_ACHECK, 73 "resent-bcc", H_RCPT|H_ACHECK|H_RESENT, 74 "apparently-to", H_RCPT, 75 76 /* message identification and control */ 77 "message-id", 0, 78 "resent-message-id", H_RESENT, 79 "message", H_EOH, 80 "text", H_EOH, 81 82 /* date fields */ 83 "date", 0, 84 "resent-date", H_RESENT, 85 86 /* trace fields */ 87 "received", H_TRACE|H_FORCE, 88 "x400-received", H_TRACE|H_FORCE, 89 "via", H_TRACE|H_FORCE, 90 "mail-from", H_TRACE|H_FORCE, 91 92 /* miscellaneous fields */ 93 "comments", H_FORCE, 94 "return-path", H_FORCE|H_ACHECK, 95 96 NULL, 0, 97 }; 98 99 100 101 /* 102 ** Location of system files/databases/etc. 103 */ 104 105 char *PidFile = _PATH_SENDMAILPID; /* stores daemon proc id */ 106 107 108 109 /* 110 ** Privacy values 111 */ 112 113 struct prival PrivacyValues[] = 114 { 115 "public", PRIV_PUBLIC, 116 "needmailhelo", PRIV_NEEDMAILHELO, 117 "needexpnhelo", PRIV_NEEDEXPNHELO, 118 "needvrfyhelo", PRIV_NEEDVRFYHELO, 119 "noexpn", PRIV_NOEXPN, 120 "novrfy", PRIV_NOVRFY, 121 "restrictmailq", PRIV_RESTRICTMAILQ, 122 "restrictqrun", PRIV_RESTRICTQRUN, 123 "authwarnings", PRIV_AUTHWARNINGS, 124 "goaway", PRIV_GOAWAY, 125 NULL, 0, 126 }; 127 128 129 130 /* 131 ** Miscellaneous stuff. 132 */ 133 134 int DtableSize = 50; /* max open files; reset in 4.2bsd */ 135 136 137 /* 138 ** Following should be config parameters (and probably will be in 139 ** future releases). In the meantime, setting these is considered 140 ** unsupported, and is intentionally undocumented. 141 */ 142 143 #ifdef BROKENSMTPPEERS 144 bool BrokenSmtpPeers = TRUE; /* set if you have broken SMTP peers */ 145 #else 146 bool BrokenSmtpPeers = FALSE; /* set if you have broken SMTP peers */ 147 #endif 148 #ifdef NOLOOPBACKCHECK 149 bool CheckLoopBack = FALSE; /* set to check HELO loopback */ 150 #else 151 bool CheckLoopBack = TRUE; /* set to check HELO loopback */ 152 #endif 153 154 /* 155 ** SETDEFAULTS -- set default values 156 ** 157 ** Because of the way freezing is done, these must be initialized 158 ** using direct code. 159 ** 160 ** Parameters: 161 ** e -- the default envelope. 162 ** 163 ** Returns: 164 ** none. 165 ** 166 ** Side Effects: 167 ** Initializes a bunch of global variables to their 168 ** default values. 169 */ 170 171 #define DAYS * 24 * 60 * 60 172 173 setdefaults(e) 174 register ENVELOPE *e; 175 { 176 SpaceSub = ' '; /* option B */ 177 QueueLA = 8; /* option x */ 178 RefuseLA = 12; /* option X */ 179 WkRecipFact = 30000L; /* option y */ 180 WkClassFact = 1800L; /* option z */ 181 WkTimeFact = 90000L; /* option Z */ 182 QueueFactor = WkRecipFact * 20; /* option q */ 183 FileMode = (RealUid != geteuid()) ? 0644 : 0600; 184 /* option F */ 185 DefUid = 1; /* option u */ 186 DefGid = 1; /* option g */ 187 CheckpointInterval = 10; /* option C */ 188 MaxHopCount = 25; /* option h */ 189 e->e_sendmode = SM_FORK; /* option d */ 190 e->e_errormode = EM_PRINT; /* option e */ 191 SevenBit = FALSE; /* option 7 */ 192 MaxMciCache = 1; /* option k */ 193 MciCacheTimeout = 300; /* option K */ 194 LogLevel = 9; /* option L */ 195 settimeouts(NULL); /* option r */ 196 TimeOuts.to_q_return = 5 DAYS; /* option T */ 197 TimeOuts.to_q_warning = 0; /* option T */ 198 PrivacyFlags = 0; /* option p */ 199 setdefuser(); 200 setupmaps(); 201 setupmailers(); 202 } 203 204 205 /* 206 ** SETDEFUSER -- set/reset DefUser using DefUid (for initgroups()) 207 */ 208 209 setdefuser() 210 { 211 struct passwd *defpwent; 212 static char defuserbuf[40]; 213 214 DefUser = defuserbuf; 215 if ((defpwent = getpwuid(DefUid)) != NULL) 216 strcpy(defuserbuf, defpwent->pw_name); 217 else 218 strcpy(defuserbuf, "nobody"); 219 } 220 /* 221 ** HOST_MAP_INIT -- initialize host class structures 222 */ 223 224 bool 225 host_map_init(map, args) 226 MAP *map; 227 char *args; 228 { 229 register char *p = args; 230 231 for (;;) 232 { 233 while (isascii(*p) && isspace(*p)) 234 p++; 235 if (*p != '-') 236 break; 237 switch (*++p) 238 { 239 case 'a': 240 map->map_app = ++p; 241 break; 242 } 243 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 244 p++; 245 if (*p != '\0') 246 *p++ = '\0'; 247 } 248 if (map->map_app != NULL) 249 map->map_app = newstr(map->map_app); 250 return TRUE; 251 } 252 /* 253 ** SETUPMAILERS -- initialize default mailers 254 */ 255 256 setupmailers() 257 { 258 char buf[100]; 259 260 strcpy(buf, "prog, P=/bin/sh, F=lsD, A=sh -c $u"); 261 makemailer(buf); 262 263 strcpy(buf, "*file*, P=/dev/null, F=lsDFMPEu, A=FILE"); 264 makemailer(buf); 265 266 strcpy(buf, "*include*, P=/dev/null, F=su, A=INCLUDE"); 267 makemailer(buf); 268 } 269 /* 270 ** SETUPMAPS -- set up map classes 271 */ 272 273 #define MAPDEF(name, ext, flags, parse, open, close, lookup, store) \ 274 { \ 275 extern bool parse __P((MAP *, char *)); \ 276 extern bool open __P((MAP *, int)); \ 277 extern void close __P((MAP *)); \ 278 extern char *lookup __P((MAP *, char *, char **, int *)); \ 279 extern void store __P((MAP *, char *, char *)); \ 280 s = stab(name, ST_MAPCLASS, ST_ENTER); \ 281 s->s_mapclass.map_cname = name; \ 282 s->s_mapclass.map_ext = ext; \ 283 s->s_mapclass.map_cflags = flags; \ 284 s->s_mapclass.map_parse = parse; \ 285 s->s_mapclass.map_open = open; \ 286 s->s_mapclass.map_close = close; \ 287 s->s_mapclass.map_lookup = lookup; \ 288 s->s_mapclass.map_store = store; \ 289 } 290 291 setupmaps() 292 { 293 register STAB *s; 294 295 #ifdef NEWDB 296 MAPDEF("hash", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 297 map_parseargs, hash_map_open, db_map_close, 298 db_map_lookup, db_map_store); 299 MAPDEF("btree", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 300 map_parseargs, bt_map_open, db_map_close, 301 db_map_lookup, db_map_store); 302 #endif 303 304 #ifdef NDBM 305 MAPDEF("dbm", ".dir", MCF_ALIASOK|MCF_REBUILDABLE, 306 map_parseargs, ndbm_map_open, ndbm_map_close, 307 ndbm_map_lookup, ndbm_map_store); 308 #endif 309 310 #ifdef NIS 311 MAPDEF("nis", NULL, MCF_ALIASOK, 312 map_parseargs, nis_map_open, nis_map_close, 313 nis_map_lookup, nis_map_store); 314 #endif 315 316 MAPDEF("stab", NULL, MCF_ALIASOK|MCF_ALIASONLY, 317 map_parseargs, stab_map_open, stab_map_close, 318 stab_map_lookup, stab_map_store); 319 320 MAPDEF("implicit", NULL, MCF_ALIASOK|MCF_ALIASONLY|MCF_REBUILDABLE, 321 map_parseargs, impl_map_open, impl_map_close, 322 impl_map_lookup, impl_map_store); 323 324 /* host DNS lookup */ 325 MAPDEF("host", NULL, 0, 326 host_map_init, null_map_open, null_map_close, 327 host_map_lookup, null_map_store); 328 329 /* dequote map */ 330 MAPDEF("dequote", NULL, 0, 331 dequote_init, null_map_open, null_map_close, 332 dequote_map, null_map_store); 333 334 #if 0 335 # ifdef USERDB 336 /* user database */ 337 MAPDEF("udb", ".db", 0, 338 udb_map_parse, null_map_open, null_map_close, 339 udb_map_lookup, null_map_store); 340 # endif 341 #endif 342 } 343 344 #undef MAPDEF 345 /* 346 ** USERNAME -- return the user id of the logged in user. 347 ** 348 ** Parameters: 349 ** none. 350 ** 351 ** Returns: 352 ** The login name of the logged in user. 353 ** 354 ** Side Effects: 355 ** none. 356 ** 357 ** Notes: 358 ** The return value is statically allocated. 359 */ 360 361 char * 362 username() 363 { 364 static char *myname = NULL; 365 extern char *getlogin(); 366 register struct passwd *pw; 367 368 /* cache the result */ 369 if (myname == NULL) 370 { 371 myname = getlogin(); 372 if (myname == NULL || myname[0] == '\0') 373 { 374 pw = getpwuid(RealUid); 375 if (pw != NULL) 376 myname = newstr(pw->pw_name); 377 } 378 else 379 { 380 uid_t uid = RealUid; 381 382 myname = newstr(myname); 383 if ((pw = getpwnam(myname)) == NULL || 384 (uid != 0 && uid != pw->pw_uid)) 385 { 386 pw = getpwuid(uid); 387 if (pw != NULL) 388 myname = newstr(pw->pw_name); 389 } 390 } 391 if (myname == NULL || myname[0] == '\0') 392 { 393 syserr("554 Who are you?"); 394 myname = "postmaster"; 395 } 396 } 397 398 return (myname); 399 } 400 /* 401 ** TTYPATH -- Get the path of the user's tty 402 ** 403 ** Returns the pathname of the user's tty. Returns NULL if 404 ** the user is not logged in or if s/he has write permission 405 ** denied. 406 ** 407 ** Parameters: 408 ** none 409 ** 410 ** Returns: 411 ** pathname of the user's tty. 412 ** NULL if not logged in or write permission denied. 413 ** 414 ** Side Effects: 415 ** none. 416 ** 417 ** WARNING: 418 ** Return value is in a local buffer. 419 ** 420 ** Called By: 421 ** savemail 422 */ 423 424 char * 425 ttypath() 426 { 427 struct stat stbuf; 428 register char *pathn; 429 extern char *ttyname(); 430 extern char *getlogin(); 431 432 /* compute the pathname of the controlling tty */ 433 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && 434 (pathn = ttyname(0)) == NULL) 435 { 436 errno = 0; 437 return (NULL); 438 } 439 440 /* see if we have write permission */ 441 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 442 { 443 errno = 0; 444 return (NULL); 445 } 446 447 /* see if the user is logged in */ 448 if (getlogin() == NULL) 449 return (NULL); 450 451 /* looks good */ 452 return (pathn); 453 } 454 /* 455 ** CHECKCOMPAT -- check for From and To person compatible. 456 ** 457 ** This routine can be supplied on a per-installation basis 458 ** to determine whether a person is allowed to send a message. 459 ** This allows restriction of certain types of internet 460 ** forwarding or registration of users. 461 ** 462 ** If the hosts are found to be incompatible, an error 463 ** message should be given using "usrerr" and 0 should 464 ** be returned. 465 ** 466 ** 'NoReturn' can be set to suppress the return-to-sender 467 ** function; this should be done on huge messages. 468 ** 469 ** Parameters: 470 ** to -- the person being sent to. 471 ** 472 ** Returns: 473 ** an exit status 474 ** 475 ** Side Effects: 476 ** none (unless you include the usrerr stuff) 477 */ 478 479 checkcompat(to, e) 480 register ADDRESS *to; 481 register ENVELOPE *e; 482 { 483 # ifdef lint 484 if (to == NULL) 485 to++; 486 # endif /* lint */ 487 488 if (tTd(49, 1)) 489 printf("checkcompat(to=%s, from=%s)\n", 490 to->q_paddr, e->e_from.q_paddr); 491 492 # ifdef EXAMPLE_CODE 493 /* this code is intended as an example only */ 494 register STAB *s; 495 496 s = stab("arpa", ST_MAILER, ST_FIND); 497 if (s != NULL && e->e_from.q_mailer != LocalMailer && 498 to->q_mailer == s->s_mailer) 499 { 500 usrerr("553 No ARPA mail through this machine: see your system administration"); 501 /* NoReturn = TRUE; to supress return copy */ 502 return (EX_UNAVAILABLE); 503 } 504 # endif /* EXAMPLE_CODE */ 505 return (EX_OK); 506 } 507 /* 508 ** SETSIGNAL -- set a signal handler 509 ** 510 ** This is essentially old BSD "signal(3)". 511 */ 512 513 sigfunc_t 514 setsignal(sig, handler) 515 int sig; 516 sigfunc_t handler; 517 { 518 #if defined(SYS5SIGNALS) || defined(BSD4_3) || defined(_AUX_SOURCE) 519 return signal(sig, handler); 520 #else 521 struct sigaction n, o; 522 523 bzero(&n, sizeof n); 524 n.sa_handler = handler; 525 if (sigaction(sig, &n, &o) < 0) 526 return SIG_ERR; 527 return o.sa_handler; 528 #endif 529 } 530 /* 531 ** HOLDSIGS -- arrange to hold all signals 532 ** 533 ** Parameters: 534 ** none. 535 ** 536 ** Returns: 537 ** none. 538 ** 539 ** Side Effects: 540 ** Arranges that signals are held. 541 */ 542 543 holdsigs() 544 { 545 } 546 /* 547 ** RLSESIGS -- arrange to release all signals 548 ** 549 ** This undoes the effect of holdsigs. 550 ** 551 ** Parameters: 552 ** none. 553 ** 554 ** Returns: 555 ** none. 556 ** 557 ** Side Effects: 558 ** Arranges that signals are released. 559 */ 560 561 rlsesigs() 562 { 563 } 564 /* 565 ** INIT_MD -- do machine dependent initializations 566 ** 567 ** Systems that have global modes that should be set should do 568 ** them here rather than in main. 569 */ 570 571 #ifdef _AUX_SOURCE 572 # include <compat.h> 573 #endif 574 575 init_md(argc, argv) 576 int argc; 577 char **argv; 578 { 579 #ifdef _AUX_SOURCE 580 setcompat(getcompat() | COMPAT_BSDPROT); 581 #endif 582 } 583 /* 584 ** GETLA -- get the current load average 585 ** 586 ** This code stolen from la.c. 587 ** 588 ** Parameters: 589 ** none. 590 ** 591 ** Returns: 592 ** The current load average as an integer. 593 ** 594 ** Side Effects: 595 ** none. 596 */ 597 598 /* try to guess what style of load average we have */ 599 #define LA_ZERO 1 /* always return load average as zero */ 600 #define LA_INT 2 /* read kmem for avenrun; interpret as long */ 601 #define LA_FLOAT 3 /* read kmem for avenrun; interpret as float */ 602 #define LA_SUBR 4 /* call getloadavg */ 603 #define LA_MACH 5 /* MACH load averages (as on NeXT boxes) */ 604 #define LA_SHORT 6 /* read kmem for avenrun; interpret as short */ 605 606 /* do guesses based on general OS type */ 607 #ifndef LA_TYPE 608 # define LA_TYPE LA_ZERO 609 #endif 610 611 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 612 613 #include <nlist.h> 614 615 #ifndef LA_AVENRUN 616 # ifdef SYSTEM5 617 # define LA_AVENRUN "avenrun" 618 # else 619 # define LA_AVENRUN "_avenrun" 620 # endif 621 #endif 622 623 /* _PATH_UNIX should be defined in <paths.h> */ 624 #ifndef _PATH_UNIX 625 # if defined(SYSTEM5) 626 # define _PATH_UNIX "/unix" 627 # else 628 # define _PATH_UNIX "/vmunix" 629 # endif 630 #endif 631 632 struct nlist Nl[] = 633 { 634 { LA_AVENRUN }, 635 #define X_AVENRUN 0 636 { 0 }, 637 }; 638 639 #ifndef FSHIFT 640 # if defined(unixpc) 641 # define FSHIFT 5 642 # endif 643 644 # if defined(__alpha) 645 # define FSHIFT 10 646 # endif 647 648 # if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 649 # define FSHIFT 8 650 # endif 651 #endif 652 653 #if ((LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT)) && !defined(FSCALE) 654 # define FSCALE (1 << FSHIFT) 655 #endif 656 657 getla() 658 { 659 static int kmem = -1; 660 #if LA_TYPE == LA_INT 661 long avenrun[3]; 662 #else 663 # if LA_TYPE == LA_SHORT 664 short avenrun[3]; 665 # else 666 double avenrun[3]; 667 # endif 668 #endif 669 extern off_t lseek(); 670 extern int errno; 671 672 if (kmem < 0) 673 { 674 kmem = open("/dev/kmem", 0, 0); 675 if (kmem < 0) 676 { 677 if (tTd(3, 1)) 678 printf("getla: open(/dev/kmem): %s\n", 679 errstring(errno)); 680 return (-1); 681 } 682 (void) fcntl(kmem, F_SETFD, 1); 683 if (nlist(_PATH_UNIX, Nl) < 0) 684 { 685 if (tTd(3, 1)) 686 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 687 errstring(errno)); 688 return (-1); 689 } 690 if (Nl[X_AVENRUN].n_value == 0) 691 { 692 if (tTd(3, 1)) 693 printf("getla: nlist(%s, %s) ==> 0\n", 694 _PATH_UNIX, LA_AVENRUN); 695 return (-1); 696 } 697 } 698 if (tTd(3, 20)) 699 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 700 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, 0) == -1 || 701 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 702 { 703 /* thank you Ian */ 704 if (tTd(3, 1)) 705 printf("getla: lseek or read: %s\n", errstring(errno)); 706 return (-1); 707 } 708 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 709 if (tTd(3, 5)) 710 { 711 printf("getla: avenrun = %d", avenrun[0]); 712 if (tTd(3, 15)) 713 printf(", %d, %d", avenrun[1], avenrun[2]); 714 printf("\n"); 715 } 716 if (tTd(3, 1)) 717 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 718 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 719 #else 720 if (tTd(3, 5)) 721 { 722 printf("getla: avenrun = %g", avenrun[0]); 723 if (tTd(3, 15)) 724 printf(", %g, %g", avenrun[1], avenrun[2]); 725 printf("\n"); 726 } 727 if (tTd(3, 1)) 728 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 729 return ((int) (avenrun[0] + 0.5)); 730 #endif 731 } 732 733 #else 734 #if LA_TYPE == LA_SUBR 735 736 #ifdef DGUX 737 738 #include <sys/dg_sys_info.h> 739 740 int getla() 741 { 742 struct dg_sys_info_load_info load_info; 743 744 dg_sys_info((long *)&load_info, 745 DG_SYS_INFO_LOAD_INFO_TYPE, DG_SYS_INFO_LOAD_VERSION_0); 746 747 return((int) (load_info.one_minute + 0.5)); 748 } 749 750 #else 751 752 getla() 753 { 754 double avenrun[3]; 755 756 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 757 { 758 if (tTd(3, 1)) 759 perror("getla: getloadavg failed:"); 760 return (-1); 761 } 762 if (tTd(3, 1)) 763 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 764 return ((int) (avenrun[0] + 0.5)); 765 } 766 767 #endif /* DGUX */ 768 #else 769 #if LA_TYPE == LA_MACH 770 771 /* 772 ** This has been tested on NEXTSTEP release 2.1/3.X. 773 */ 774 775 #if defined(NX_CURRENT_COMPILER_RELEASE) && NX_CURRENT_COMPILER_RELEASE > NX_COMPILER_RELEASE_3_0 776 # include <mach/mach.h> 777 #else 778 # include <mach.h> 779 #endif 780 781 getla() 782 { 783 processor_set_t default_set; 784 kern_return_t error; 785 unsigned int info_count; 786 struct processor_set_basic_info info; 787 host_t host; 788 789 error = processor_set_default(host_self(), &default_set); 790 if (error != KERN_SUCCESS) 791 return -1; 792 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 793 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 794 &host, (processor_set_info_t)&info, 795 &info_count) != KERN_SUCCESS) 796 { 797 return -1; 798 } 799 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 800 } 801 802 803 #else 804 805 getla() 806 { 807 if (tTd(3, 1)) 808 printf("getla: ZERO\n"); 809 return (0); 810 } 811 812 #endif 813 #endif 814 #endif 815 /* 816 ** SHOULDQUEUE -- should this message be queued or sent? 817 ** 818 ** Compares the message cost to the load average to decide. 819 ** 820 ** Parameters: 821 ** pri -- the priority of the message in question. 822 ** ctime -- the message creation time. 823 ** 824 ** Returns: 825 ** TRUE -- if this message should be queued up for the 826 ** time being. 827 ** FALSE -- if the load is low enough to send this message. 828 ** 829 ** Side Effects: 830 ** none. 831 */ 832 833 bool 834 shouldqueue(pri, ctime) 835 long pri; 836 time_t ctime; 837 { 838 if (CurrentLA < QueueLA) 839 return (FALSE); 840 if (CurrentLA >= RefuseLA) 841 return (TRUE); 842 return (pri > (QueueFactor / (CurrentLA - QueueLA + 1))); 843 } 844 /* 845 ** REFUSECONNECTIONS -- decide if connections should be refused 846 ** 847 ** Parameters: 848 ** none. 849 ** 850 ** Returns: 851 ** TRUE if incoming SMTP connections should be refused 852 ** (for now). 853 ** FALSE if we should accept new work. 854 ** 855 ** Side Effects: 856 ** none. 857 */ 858 859 bool 860 refuseconnections() 861 { 862 #ifdef XLA 863 if (!xla_smtp_ok()) 864 return TRUE; 865 #endif 866 867 /* this is probably too simplistic */ 868 return (CurrentLA >= RefuseLA); 869 } 870 /* 871 ** SETPROCTITLE -- set process title for ps 872 ** 873 ** Parameters: 874 ** fmt -- a printf style format string. 875 ** a, b, c -- possible parameters to fmt. 876 ** 877 ** Returns: 878 ** none. 879 ** 880 ** Side Effects: 881 ** Clobbers argv of our main procedure so ps(1) will 882 ** display the title. 883 */ 884 885 #ifdef SETPROCTITLE 886 # ifdef __hpux 887 # include <sys/pstat.h> 888 # endif 889 # ifdef BSD4_4 890 # include <machine/vmparam.h> 891 # include <sys/exec.h> 892 # ifdef __bsdi__ 893 # undef PS_STRINGS /* BSDI 1.0 doesn't do PS_STRINGS as we expect */ 894 # define PROCTITLEPAD '\0' 895 # endif 896 # ifdef PS_STRINGS 897 # define SETPROC_STATIC static 898 # endif 899 # endif 900 # ifndef SETPROC_STATIC 901 # define SETPROC_STATIC 902 # endif 903 #endif 904 905 #ifndef PROCTITLEPAD 906 # define PROCTITLEPAD ' ' 907 #endif 908 909 /*VARARGS1*/ 910 #ifdef __STDC__ 911 setproctitle(char *fmt, ...) 912 #else 913 setproctitle(fmt, va_alist) 914 char *fmt; 915 va_dcl 916 #endif 917 { 918 # ifdef SETPROCTITLE 919 register char *p; 920 register int i; 921 SETPROC_STATIC char buf[MAXLINE]; 922 VA_LOCAL_DECL 923 # ifdef __hpux 924 union pstun pst; 925 # endif 926 extern char **Argv; 927 extern char *LastArgv; 928 929 p = buf; 930 931 /* print sendmail: heading for grep */ 932 (void) strcpy(p, "sendmail: "); 933 p += strlen(p); 934 935 /* print the argument string */ 936 VA_START(fmt); 937 (void) vsprintf(p, fmt, ap); 938 VA_END; 939 940 i = strlen(buf); 941 942 # ifdef __hpux 943 pst.pst_command = buf; 944 pstat(PSTAT_SETCMD, pst, i, 0, 0); 945 # else 946 # ifdef PS_STRINGS 947 PS_STRINGS->ps_nargvstr = 1; 948 PS_STRINGS->ps_argvstr = buf; 949 # else 950 if (i > LastArgv - Argv[0] - 2) 951 { 952 i = LastArgv - Argv[0] - 2; 953 buf[i] = '\0'; 954 } 955 (void) strcpy(Argv[0], buf); 956 p = &Argv[0][i]; 957 while (p < LastArgv) 958 *p++ = PROCTITLEPAD; 959 # endif 960 # endif 961 # endif /* SETPROCTITLE */ 962 } 963 /* 964 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 965 ** 966 ** Parameters: 967 ** none. 968 ** 969 ** Returns: 970 ** none. 971 ** 972 ** Side Effects: 973 ** Picks up extant zombies. 974 */ 975 976 void 977 reapchild() 978 { 979 int olderrno = errno; 980 # ifdef HASWAITPID 981 auto int status; 982 int count; 983 int pid; 984 985 count = 0; 986 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 987 { 988 if (count++ > 1000) 989 { 990 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 991 pid, status); 992 break; 993 } 994 } 995 # else 996 # ifdef WNOHANG 997 union wait status; 998 999 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 1000 continue; 1001 # else /* WNOHANG */ 1002 auto int status; 1003 1004 while (wait(&status) > 0) 1005 continue; 1006 # endif /* WNOHANG */ 1007 # endif 1008 # ifdef SYS5SIGNALS 1009 (void) setsignal(SIGCHLD, reapchild); 1010 # endif 1011 errno = olderrno; 1012 } 1013 /* 1014 ** UNSETENV -- remove a variable from the environment 1015 ** 1016 ** Not needed on newer systems. 1017 ** 1018 ** Parameters: 1019 ** name -- the string name of the environment variable to be 1020 ** deleted from the current environment. 1021 ** 1022 ** Returns: 1023 ** none. 1024 ** 1025 ** Globals: 1026 ** environ -- a pointer to the current environment. 1027 ** 1028 ** Side Effects: 1029 ** Modifies environ. 1030 */ 1031 1032 #ifndef HASUNSETENV 1033 1034 void 1035 unsetenv(name) 1036 char *name; 1037 { 1038 extern char **environ; 1039 register char **pp; 1040 int len = strlen(name); 1041 1042 for (pp = environ; *pp != NULL; pp++) 1043 { 1044 if (strncmp(name, *pp, len) == 0 && 1045 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1046 break; 1047 } 1048 1049 for (; *pp != NULL; pp++) 1050 *pp = pp[1]; 1051 } 1052 1053 #endif 1054 /* 1055 ** GETDTABLESIZE -- return number of file descriptors 1056 ** 1057 ** Only on non-BSD systems 1058 ** 1059 ** Parameters: 1060 ** none 1061 ** 1062 ** Returns: 1063 ** size of file descriptor table 1064 ** 1065 ** Side Effects: 1066 ** none 1067 */ 1068 1069 #ifdef SOLARIS 1070 # include <sys/resource.h> 1071 #endif 1072 1073 int 1074 getdtsize() 1075 { 1076 #ifdef RLIMIT_NOFILE 1077 struct rlimit rl; 1078 1079 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1080 return rl.rlim_cur; 1081 #endif 1082 1083 # ifdef HASGETDTABLESIZE 1084 return getdtablesize(); 1085 # else 1086 # ifdef _SC_OPEN_MAX 1087 return sysconf(_SC_OPEN_MAX); 1088 # else 1089 return NOFILE; 1090 # endif 1091 # endif 1092 } 1093 /* 1094 ** UNAME -- get the UUCP name of this system. 1095 */ 1096 1097 #ifndef HASUNAME 1098 1099 int 1100 uname(name) 1101 struct utsname *name; 1102 { 1103 FILE *file; 1104 char *n; 1105 1106 name->nodename[0] = '\0'; 1107 1108 /* try /etc/whoami -- one line with the node name */ 1109 if ((file = fopen("/etc/whoami", "r")) != NULL) 1110 { 1111 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1112 (void) fclose(file); 1113 n = strchr(name->nodename, '\n'); 1114 if (n != NULL) 1115 *n = '\0'; 1116 if (name->nodename[0] != '\0') 1117 return (0); 1118 } 1119 1120 /* try /usr/include/whoami.h -- has a #define somewhere */ 1121 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1122 { 1123 char buf[MAXLINE]; 1124 1125 while (fgets(buf, MAXLINE, file) != NULL) 1126 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1127 NODE_LENGTH, name->nodename) > 0) 1128 break; 1129 (void) fclose(file); 1130 if (name->nodename[0] != '\0') 1131 return (0); 1132 } 1133 1134 #ifdef TRUST_POPEN 1135 /* 1136 ** Popen is known to have security holes. 1137 */ 1138 1139 /* try uuname -l to return local name */ 1140 if ((file = popen("uuname -l", "r")) != NULL) 1141 { 1142 (void) fgets(name, NODE_LENGTH + 1, file); 1143 (void) pclose(file); 1144 n = strchr(name, '\n'); 1145 if (n != NULL) 1146 *n = '\0'; 1147 if (name->nodename[0] != '\0') 1148 return (0); 1149 } 1150 #endif 1151 1152 return (-1); 1153 } 1154 #endif /* HASUNAME */ 1155 /* 1156 ** INITGROUPS -- initialize groups 1157 ** 1158 ** Stub implementation for System V style systems 1159 */ 1160 1161 #ifndef HASINITGROUPS 1162 1163 initgroups(name, basegid) 1164 char *name; 1165 int basegid; 1166 { 1167 return 0; 1168 } 1169 1170 #endif 1171 /* 1172 ** SETSID -- set session id (for non-POSIX systems) 1173 */ 1174 1175 #ifndef HASSETSID 1176 1177 pid_t 1178 setsid __P ((void)) 1179 { 1180 #ifdef TIOCNOTTY 1181 int fd; 1182 1183 fd = open("/dev/tty", 2); 1184 if (fd >= 0) 1185 { 1186 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1187 (void) close(fd); 1188 } 1189 #endif /* TIOCNOTTY */ 1190 # ifdef SYS5SETPGRP 1191 return setpgrp(); 1192 # else 1193 return setpgid(0, getpid()); 1194 # endif 1195 } 1196 1197 #endif 1198 /* 1199 ** DGUX_INET_ADDR -- inet_addr for DG/UX 1200 ** 1201 ** Data General DG/UX version of inet_addr returns a struct in_addr 1202 ** instead of a long. This patches things. 1203 */ 1204 1205 #ifdef DGUX 1206 1207 #undef inet_addr 1208 1209 long 1210 dgux_inet_addr(host) 1211 char *host; 1212 { 1213 struct in_addr haddr; 1214 1215 haddr = inet_addr(host); 1216 return haddr.s_addr; 1217 } 1218 1219 #endif 1220 /* 1221 ** GETOPT -- for old systems or systems with bogus implementations 1222 */ 1223 1224 #ifdef NEEDGETOPT 1225 1226 /* 1227 * Copyright (c) 1985 Regents of the University of California. 1228 * All rights reserved. The Berkeley software License Agreement 1229 * specifies the terms and conditions for redistribution. 1230 */ 1231 1232 1233 /* 1234 ** this version hacked to add `atend' flag to allow state machine 1235 ** to reset if invoked by the program to scan args for a 2nd time 1236 */ 1237 1238 #if defined(LIBC_SCCS) && !defined(lint) 1239 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1240 #endif /* LIBC_SCCS and not lint */ 1241 1242 #include <stdio.h> 1243 1244 /* 1245 * get option letter from argument vector 1246 */ 1247 #ifdef _CONVEX_SOURCE 1248 extern int optind, opterr; 1249 #else 1250 int opterr = 1; /* if error message should be printed */ 1251 int optind = 1; /* index into parent argv vector */ 1252 #endif 1253 int optopt; /* character checked for validity */ 1254 char *optarg; /* argument associated with option */ 1255 1256 #define BADCH (int)'?' 1257 #define EMSG "" 1258 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1259 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1260 1261 getopt(nargc,nargv,ostr) 1262 int nargc; 1263 char *const *nargv; 1264 const char *ostr; 1265 { 1266 static char *place = EMSG; /* option letter processing */ 1267 static char atend = 0; 1268 register char *oli; /* option letter list index */ 1269 1270 if (atend) { 1271 atend = 0; 1272 place = EMSG; 1273 } 1274 if(!*place) { /* update scanning pointer */ 1275 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1276 atend++; 1277 return(EOF); 1278 } 1279 if (*place == '-') { /* found "--" */ 1280 ++optind; 1281 atend++; 1282 return(EOF); 1283 } 1284 } /* option letter okay? */ 1285 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1286 if (!*place) ++optind; 1287 tell(": illegal option -- "); 1288 } 1289 if (*++oli != ':') { /* don't need argument */ 1290 optarg = NULL; 1291 if (!*place) ++optind; 1292 } 1293 else { /* need an argument */ 1294 if (*place) optarg = place; /* no white space */ 1295 else if (nargc <= ++optind) { /* no arg */ 1296 place = EMSG; 1297 tell(": option requires an argument -- "); 1298 } 1299 else optarg = nargv[optind]; /* white space */ 1300 place = EMSG; 1301 ++optind; 1302 } 1303 return(optopt); /* dump back option letter */ 1304 } 1305 1306 #endif 1307 /* 1308 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1309 */ 1310 1311 #ifdef NEEDVPRINTF 1312 1313 #define MAXARG 16 1314 1315 vfprintf(fp, fmt, ap) 1316 FILE * fp; 1317 char * fmt; 1318 char ** ap; 1319 { 1320 char * bp[MAXARG]; 1321 int i = 0; 1322 1323 while (*ap && i < MAXARG) 1324 bp[i++] = *ap++; 1325 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1326 bp[4], bp[5], bp[6], bp[7], 1327 bp[8], bp[9], bp[10], bp[11], 1328 bp[12], bp[13], bp[14], bp[15]); 1329 } 1330 1331 vsprintf(s, fmt, ap) 1332 char * s; 1333 char * fmt; 1334 char ** ap; 1335 { 1336 char * bp[MAXARG]; 1337 int i = 0; 1338 1339 while (*ap && i < MAXARG) 1340 bp[i++] = *ap++; 1341 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1342 bp[4], bp[5], bp[6], bp[7], 1343 bp[8], bp[9], bp[10], bp[11], 1344 bp[12], bp[13], bp[14], bp[15]); 1345 } 1346 1347 #endif 1348 /* 1349 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 1350 ** 1351 ** Parameters: 1352 ** shell -- the user's shell from /etc/passwd 1353 ** 1354 ** Returns: 1355 ** TRUE -- if it is ok to use this for unrestricted access. 1356 ** FALSE -- if the shell is restricted. 1357 */ 1358 1359 #ifndef _PATH_SHELLS 1360 # define _PATH_SHELLS "/etc/shells" 1361 #endif 1362 #ifndef _PATH_BSHELL 1363 # define _PATH_BSHELL "/bin/sh" 1364 #endif 1365 #ifndef _PATH_CSHELL 1366 # define _PATH_CSHELL "/bin/csh" 1367 #endif 1368 1369 bool 1370 usershellok(shell) 1371 char *shell; 1372 { 1373 #if HASGETUSERSHELL 1374 register char *p; 1375 extern char *getusershell(); 1376 1377 setusershell(); 1378 while ((p = getusershell()) != NULL) 1379 if (strcmp(p, shell) == 0 || strcmp(p, "*") == 0) 1380 break; 1381 endusershell(); 1382 return p != NULL; 1383 #else 1384 register FILE *shellf; 1385 char buf[MAXLINE]; 1386 1387 shellf = fopen(_PATH_SHELLS, "r"); 1388 if (shellf == NULL) 1389 { 1390 /* no /etc/shells; see if it is one of the std shells */ 1391 return (strcmp(shell, _PATH_CSHELL) == 0 || 1392 strcmp(shell, _PATH_BSHELL) == 0); 1393 } 1394 1395 while (fgets(buf, sizeof buf, shellf) != NULL) 1396 { 1397 register char *p, *q; 1398 1399 p = buf; 1400 while (*p != '\0' && *p != '#' && *p != '/') 1401 p++; 1402 if (*p == '#' || *p == '\0') 1403 continue; 1404 q = p; 1405 while (*p != '\0' && *p != '#' && !isspace(*p)) 1406 p++; 1407 *p = '\0'; 1408 if (strcmp(shell, q) == 0 || strcmp("*", q) == 0) 1409 { 1410 fclose(shellf); 1411 return TRUE; 1412 } 1413 } 1414 fclose(shellf); 1415 return FALSE; 1416 #endif 1417 } 1418 /* 1419 ** FREESPACE -- see how much free space is on the queue filesystem 1420 ** 1421 ** Only implemented if you have statfs. 1422 ** 1423 ** Parameters: 1424 ** dir -- the directory in question. 1425 ** bsize -- a variable into which the filesystem 1426 ** block size is stored. 1427 ** 1428 ** Returns: 1429 ** The number of bytes free on the queue filesystem. 1430 ** -1 if the statfs call fails. 1431 ** 1432 ** Side effects: 1433 ** Puts the filesystem block size into bsize. 1434 */ 1435 1436 #ifdef HASSTATFS 1437 # undef HASUSTAT 1438 #endif 1439 1440 #if defined(HASUSTAT) 1441 # include <ustat.h> 1442 #endif 1443 1444 #ifdef HASSTATFS 1445 # if defined(IRIX) || defined(apollo) || defined(_SCO_unix_) || defined(UMAXV) || defined(DGUX) || defined(_AIX3) 1446 # include <sys/statfs.h> 1447 # else 1448 # if (defined(sun) && !defined(BSD)) || defined(__hpux) || defined(_CONVEX_SOURCE) || defined(NeXT) || defined(_AUX_SOURCE) || defined(MACH386) 1449 # include <sys/vfs.h> 1450 # else 1451 # include <sys/mount.h> 1452 # endif 1453 # endif 1454 #endif 1455 1456 long 1457 freespace(dir, bsize) 1458 char *dir; 1459 long *bsize; 1460 { 1461 #if defined(HASSTATFS) || defined(HASUSTAT) 1462 # if defined(HASUSTAT) 1463 struct ustat fs; 1464 struct stat statbuf; 1465 # define FSBLOCKSIZE DEV_BSIZE 1466 # define f_bavail f_tfree 1467 # else 1468 # if defined(ultrix) 1469 struct fs_data fs; 1470 # define f_bavail fd_bfreen 1471 # define FSBLOCKSIZE fs.fd_bsize 1472 # else 1473 struct statfs fs; 1474 # define FSBLOCKSIZE fs.f_bsize 1475 # if defined(_SCO_unix_) || defined(IRIX) 1476 # define f_bavail f_bfree 1477 # endif 1478 # endif 1479 # endif 1480 extern int errno; 1481 1482 # if defined(HASUSTAT) 1483 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 1484 # else 1485 # if defined(IRIX) || defined(apollo) || defined(UMAXV) || defined(DGUX) 1486 if (statfs(dir, &fs, sizeof fs, 0) == 0) 1487 # else 1488 # if defined(ultrix) 1489 if (statfs(dir, &fs) > 0) 1490 # else 1491 if (statfs(dir, &fs) == 0) 1492 # endif 1493 # endif 1494 # endif 1495 { 1496 if (bsize != NULL) 1497 *bsize = FSBLOCKSIZE; 1498 return (fs.f_bavail); 1499 } 1500 #endif 1501 return (-1); 1502 } 1503 /* 1504 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 1505 ** 1506 ** Only implemented if you have statfs. 1507 ** 1508 ** Parameters: 1509 ** msize -- the size to check against. If zero, we don't yet 1510 ** know how big the message will be, so just check for 1511 ** a "reasonable" amount. 1512 ** 1513 ** Returns: 1514 ** TRUE if there is enough space. 1515 ** FALSE otherwise. 1516 */ 1517 1518 bool 1519 enoughspace(msize) 1520 long msize; 1521 { 1522 long bfree, bsize; 1523 1524 if (MinBlocksFree <= 0 && msize <= 0) 1525 { 1526 if (tTd(4, 80)) 1527 printf("enoughspace: no threshold\n"); 1528 return TRUE; 1529 } 1530 1531 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 1532 { 1533 if (tTd(4, 80)) 1534 printf("enoughspace: bavail=%ld, need=%ld\n", 1535 bfree, msize); 1536 1537 /* convert msize to block count */ 1538 msize = msize / bsize + 1; 1539 if (MinBlocksFree >= 0) 1540 msize += MinBlocksFree; 1541 1542 if (bfree < msize) 1543 { 1544 #ifdef LOG 1545 if (LogLevel > 0) 1546 syslog(LOG_ALERT, 1547 "%s: low on space (have %ld, %s needs %ld in %s)", 1548 CurEnv->e_id, bfree, 1549 CurHostName, msize, QueueDir); 1550 #endif 1551 return FALSE; 1552 } 1553 } 1554 else if (tTd(4, 80)) 1555 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 1556 MinBlocksFree, msize, errstring(errno)); 1557 return TRUE; 1558 } 1559 /* 1560 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 1561 ** 1562 ** This looks at an errno value and tells if this is likely to 1563 ** go away if retried later. 1564 ** 1565 ** Parameters: 1566 ** err -- the errno code to classify. 1567 ** 1568 ** Returns: 1569 ** TRUE if this is probably transient. 1570 ** FALSE otherwise. 1571 */ 1572 1573 bool 1574 transienterror(err) 1575 int err; 1576 { 1577 switch (err) 1578 { 1579 case EIO: /* I/O error */ 1580 case ENXIO: /* Device not configured */ 1581 case EAGAIN: /* Resource temporarily unavailable */ 1582 case ENOMEM: /* Cannot allocate memory */ 1583 case ENODEV: /* Operation not supported by device */ 1584 case ENFILE: /* Too many open files in system */ 1585 case EMFILE: /* Too many open files */ 1586 case ENOSPC: /* No space left on device */ 1587 #ifdef ETIMEDOUT 1588 case ETIMEDOUT: /* Connection timed out */ 1589 #endif 1590 #ifdef ESTALE 1591 case ESTALE: /* Stale NFS file handle */ 1592 #endif 1593 #ifdef ENETDOWN 1594 case ENETDOWN: /* Network is down */ 1595 #endif 1596 #ifdef ENETUNREACH 1597 case ENETUNREACH: /* Network is unreachable */ 1598 #endif 1599 #ifdef ENETRESET 1600 case ENETRESET: /* Network dropped connection on reset */ 1601 #endif 1602 #ifdef ECONNABORTED 1603 case ECONNABORTED: /* Software caused connection abort */ 1604 #endif 1605 #ifdef ECONNRESET 1606 case ECONNRESET: /* Connection reset by peer */ 1607 #endif 1608 #ifdef ENOBUFS 1609 case ENOBUFS: /* No buffer space available */ 1610 #endif 1611 #ifdef ESHUTDOWN 1612 case ESHUTDOWN: /* Can't send after socket shutdown */ 1613 #endif 1614 #ifdef ECONNREFUSED 1615 case ECONNREFUSED: /* Connection refused */ 1616 #endif 1617 #ifdef EHOSTDOWN 1618 case EHOSTDOWN: /* Host is down */ 1619 #endif 1620 #ifdef EHOSTUNREACH 1621 case EHOSTUNREACH: /* No route to host */ 1622 #endif 1623 #ifdef EDQUOT 1624 case EDQUOT: /* Disc quota exceeded */ 1625 #endif 1626 #ifdef EPROCLIM 1627 case EPROCLIM: /* Too many processes */ 1628 #endif 1629 #ifdef EUSERS 1630 case EUSERS: /* Too many users */ 1631 #endif 1632 #ifdef EDEADLK 1633 case EDEADLK: /* Resource deadlock avoided */ 1634 #endif 1635 #ifdef EISCONN 1636 case EISCONN: /* Socket already connected */ 1637 #endif 1638 #ifdef EINPROGRESS 1639 case EINPROGRESS: /* Operation now in progress */ 1640 #endif 1641 #ifdef EALREADY 1642 case EALREADY: /* Operation already in progress */ 1643 #endif 1644 #ifdef EADDRINUSE 1645 case EADDRINUSE: /* Address already in use */ 1646 #endif 1647 #ifdef EADDRNOTAVAIL 1648 case EADDRNOTAVAIL: /* Can't assign requested address */ 1649 #endif 1650 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 1651 case ENOSR: /* Out of streams resources */ 1652 #endif 1653 return TRUE; 1654 } 1655 1656 /* nope, must be permanent */ 1657 return FALSE; 1658 } 1659 /* 1660 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 1661 ** 1662 ** Parameters: 1663 ** fd -- the file descriptor of the file. 1664 ** filename -- the file name (for error messages). 1665 ** ext -- the filename extension. 1666 ** type -- type of the lock. Bits can be: 1667 ** LOCK_EX -- exclusive lock. 1668 ** LOCK_NB -- non-blocking. 1669 ** 1670 ** Returns: 1671 ** TRUE if the lock was acquired. 1672 ** FALSE otherwise. 1673 */ 1674 1675 bool 1676 lockfile(fd, filename, ext, type) 1677 int fd; 1678 char *filename; 1679 char *ext; 1680 int type; 1681 { 1682 # ifndef HASFLOCK 1683 int action; 1684 struct flock lfd; 1685 1686 if (ext == NULL) 1687 ext = ""; 1688 1689 bzero(&lfd, sizeof lfd); 1690 if (bitset(LOCK_UN, type)) 1691 lfd.l_type = F_UNLCK; 1692 else if (bitset(LOCK_EX, type)) 1693 lfd.l_type = F_WRLCK; 1694 else 1695 lfd.l_type = F_RDLCK; 1696 1697 if (bitset(LOCK_NB, type)) 1698 action = F_SETLK; 1699 else 1700 action = F_SETLKW; 1701 1702 if (tTd(55, 60)) 1703 printf("lockfile(%s%s, action=%d, type=%d): ", 1704 filename, ext, action, lfd.l_type); 1705 1706 if (fcntl(fd, action, &lfd) >= 0) 1707 { 1708 if (tTd(55, 60)) 1709 printf("SUCCESS\n"); 1710 return TRUE; 1711 } 1712 1713 if (tTd(55, 60)) 1714 printf("(%s) ", errstring(errno)); 1715 1716 /* 1717 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 1718 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 1719 ** as type "tmp" (that is, served from swap space), the 1720 ** previous fcntl will fail with "Invalid argument" errors. 1721 ** Since this is fairly common during testing, we will assume 1722 ** that this indicates that the lock is successfully grabbed. 1723 */ 1724 1725 if (errno == EINVAL) 1726 { 1727 if (tTd(55, 60)) 1728 printf("SUCCESS\n"); 1729 return TRUE; 1730 } 1731 1732 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 1733 { 1734 int omode = -1; 1735 # ifdef F_GETFL 1736 int oerrno = errno; 1737 1738 (void) fcntl(fd, F_GETFL, &omode); 1739 errno = oerrno; 1740 # endif 1741 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1742 filename, ext, fd, type, omode, geteuid()); 1743 } 1744 # else 1745 if (ext == NULL) 1746 ext = ""; 1747 1748 if (tTd(55, 60)) 1749 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 1750 1751 if (flock(fd, type) >= 0) 1752 { 1753 if (tTd(55, 60)) 1754 printf("SUCCESS\n"); 1755 return TRUE; 1756 } 1757 1758 if (tTd(55, 60)) 1759 printf("(%s) ", errstring(errno)); 1760 1761 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 1762 { 1763 int omode = -1; 1764 # ifdef F_GETFL 1765 int oerrno = errno; 1766 1767 (void) fcntl(fd, F_GETFL, &omode); 1768 errno = oerrno; 1769 # endif 1770 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1771 filename, ext, fd, type, omode, geteuid()); 1772 } 1773 # endif 1774 if (tTd(55, 60)) 1775 printf("FAIL\n"); 1776 return FALSE; 1777 } 1778 /* 1779 ** GETCFNAME -- return the name of the .cf file. 1780 ** 1781 ** Some systems (e.g., NeXT) determine this dynamically. 1782 */ 1783 1784 char * 1785 getcfname() 1786 { 1787 if (ConfFile != NULL) 1788 return ConfFile; 1789 #ifdef NETINFO 1790 { 1791 extern char *ni_propval(); 1792 char *cflocation; 1793 1794 cflocation = ni_propval("/locations/sendmail", "sendmail.cf"); 1795 if (cflocation != NULL) 1796 return cflocation; 1797 } 1798 #endif 1799 return _PATH_SENDMAILCF; 1800 } 1801 /* 1802 ** SETVENDOR -- process vendor code from V configuration line 1803 ** 1804 ** Parameters: 1805 ** vendor -- string representation of vendor. 1806 ** 1807 ** Returns: 1808 ** TRUE -- if ok. 1809 ** FALSE -- if vendor code could not be processed. 1810 ** 1811 ** Side Effects: 1812 ** It is reasonable to set mode flags here to tweak 1813 ** processing in other parts of the code if necessary. 1814 ** For example, if you are a vendor that uses $%y to 1815 ** indicate YP lookups, you could enable that here. 1816 */ 1817 1818 bool 1819 setvendor(vendor) 1820 char *vendor; 1821 { 1822 if (strcasecmp(vendor, "Berkeley") == 0) 1823 return TRUE; 1824 1825 /* add vendor extensions here */ 1826 1827 return FALSE; 1828 } 1829 /* 1830 ** STRTOL -- convert string to long integer 1831 ** 1832 ** For systems that don't have it in the C library. 1833 */ 1834 1835 #ifdef NEEDSTRTOL 1836 1837 long 1838 strtol(p, ep, b) 1839 char *p; 1840 char **ep; 1841 int b; 1842 { 1843 long l = 0; 1844 char c; 1845 char maxd; 1846 int neg = 1; 1847 1848 maxd = (b > 10) ? '9' : b + '0'; 1849 1850 if (p && *p == '-') { 1851 neg = -1; 1852 p++; 1853 } 1854 while (p && (c = *p)) { 1855 if (c >= '0' && c <= maxd) { 1856 l = l*b + *p++ - '0'; 1857 continue; 1858 } 1859 if (c >= 'A' && c <= 'Z') 1860 c -= 'A' + 'a'; 1861 c = c - 'a' + 10; 1862 if (b > c) { 1863 l = l*b + c; 1864 p++; 1865 continue; 1866 } 1867 break; 1868 } 1869 l *= neg; 1870 if (ep) 1871 *ep = p; 1872 return l; 1873 } 1874 1875 #endif 1876 /* 1877 ** SOLARIS_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 1878 ** 1879 ** Solaris versions prior through 2.3 don't properly deliver a 1880 ** canonical h_name field. This tries to work around it. 1881 */ 1882 1883 #ifdef SOLARIS 1884 1885 struct hostent * 1886 solaris_gethostbyname(name) 1887 const char *name; 1888 { 1889 # ifdef SOLARIS_2_3 1890 static struct hostent hp; 1891 static char buf[1000]; 1892 extern struct hostent *_switch_gethostbyname_r(); 1893 1894 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 1895 # else 1896 extern struct hostent *__switch_gethostbyname(); 1897 1898 return __switch_gethostbyname(name); 1899 # endif 1900 } 1901 1902 struct hostent * 1903 solaris_gethostbyaddr(addr, len, type) 1904 const char *addr; 1905 int len; 1906 int type; 1907 { 1908 # ifdef SOLARIS_2_3 1909 static struct hostent hp; 1910 static char buf[1000]; 1911 extern struct hostent *_switch_gethostbyaddr_r(); 1912 1913 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 1914 # else 1915 extern struct hostent *__switch_gethostbyaddr(); 1916 1917 return __switch_gethostbyaddr(addr, len, type); 1918 # endif 1919 } 1920 1921 #endif 1922 /* 1923 ** NI_PROPVAL -- netinfo property value lookup routine 1924 ** 1925 ** Parameters: 1926 ** directory -- the Netinfo directory name. 1927 ** propname -- the Netinfo property name. 1928 ** 1929 ** Returns: 1930 ** NULL -- if: 1931 ** 1. the directory is not found 1932 ** 2. the property name is not found 1933 ** 3. the property contains multiple values 1934 ** 4. some error occured 1935 ** else -- the location of the config file. 1936 ** 1937 ** Notes: 1938 ** Caller should free the return value of ni_proval 1939 */ 1940 1941 #ifdef NETINFO 1942 1943 # include <netinfo/ni.h> 1944 1945 # define LOCAL_NETINFO_DOMAIN "." 1946 # define PARENT_NETINFO_DOMAIN ".." 1947 # define MAX_NI_LEVELS 256 1948 1949 char * 1950 ni_propval(directory, propname) 1951 char *directory; 1952 char *propname; 1953 { 1954 char *propval; 1955 int i; 1956 void *ni = NULL; 1957 void *lastni = NULL; 1958 ni_status nis; 1959 ni_id nid; 1960 ni_namelist ninl; 1961 1962 /* 1963 ** If the passed directory and property name are found 1964 ** in one of netinfo domains we need to search (starting 1965 ** from the local domain moving all the way back to the 1966 ** root domain) set propval to the property's value 1967 ** and return it. 1968 */ 1969 1970 for (i = 0; i < MAX_NI_LEVELS; ++i) 1971 { 1972 if (i == 0) 1973 { 1974 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 1975 } 1976 else 1977 { 1978 if (lastni != NULL) 1979 ni_free(lastni); 1980 lastni = ni; 1981 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 1982 } 1983 1984 /* 1985 ** Don't bother if we didn't get a handle on a 1986 ** proper domain. This is not necessarily an error. 1987 ** We would get a positive ni_status if, for instance 1988 ** we never found the directory or property and tried 1989 ** to open the parent of the root domain! 1990 */ 1991 1992 if (nis != 0) 1993 break; 1994 1995 /* 1996 ** Find the path to the server information. 1997 */ 1998 1999 if (ni_pathsearch(ni, &nid, directory) != 0) 2000 continue; 2001 2002 /* 2003 ** Find "host" information. 2004 */ 2005 2006 if (ni_lookupprop(ni, &nid, propname, &ninl) != 0) 2007 continue; 2008 2009 /* 2010 ** If there's only one name in 2011 ** the list, assume we've got 2012 ** what we want. 2013 */ 2014 2015 if (ninl.ni_namelist_len == 1) 2016 { 2017 propval = ni_name_dup(ninl.ni_namelist_val[0]); 2018 break; 2019 } 2020 } 2021 2022 /* 2023 ** Clean up. 2024 */ 2025 2026 if (ni != NULL) 2027 ni_free(ni); 2028 if (lastni != NULL && ni != lastni) 2029 ni_free(lastni); 2030 2031 return propval; 2032 } 2033 2034 #endif /* NETINFO */ 2035 /* 2036 ** HARD_SYSLOG -- call syslog repeatedly until it works 2037 ** 2038 ** Needed on HP-UX, which apparently doesn't guarantee that 2039 ** syslog succeeds during interrupt handlers. 2040 */ 2041 2042 #ifdef __hpux 2043 2044 # define MAXSYSLOGTRIES 100 2045 # undef syslog 2046 2047 # ifdef __STDC__ 2048 hard_syslog(int pri, char *msg, ...) 2049 # else 2050 hard_syslog(pri, msg, va_alist) 2051 int pri; 2052 char *msg; 2053 va_dcl 2054 # endif 2055 { 2056 int i; 2057 char buf[SYSLOG_BUFSIZE * 2]; 2058 VA_LOCAL_DECL; 2059 2060 VA_START(msg); 2061 vsprintf(buf, msg, ap); 2062 VA_END; 2063 2064 for (i = MAXSYSLOGTRIES; --i >= 0 && syslog(pri, "%s", buf) < 0; ) 2065 continue; 2066 } 2067 2068 #endif 2069