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 8.58 (Berkeley) 12/27/93"; 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 int opterr = 1, /* if error message should be printed */ 1248 optind = 1, /* index into parent argv vector */ 1249 optopt; /* character checked for validity */ 1250 char *optarg; /* argument associated with option */ 1251 1252 #define BADCH (int)'?' 1253 #define EMSG "" 1254 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1255 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1256 1257 getopt(nargc,nargv,ostr) 1258 int nargc; 1259 char *const *nargv; 1260 const char *ostr; 1261 { 1262 static char *place = EMSG; /* option letter processing */ 1263 static char atend = 0; 1264 register char *oli; /* option letter list index */ 1265 1266 if (atend) { 1267 atend = 0; 1268 place = EMSG; 1269 } 1270 if(!*place) { /* update scanning pointer */ 1271 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1272 atend++; 1273 return(EOF); 1274 } 1275 if (*place == '-') { /* found "--" */ 1276 ++optind; 1277 atend++; 1278 return(EOF); 1279 } 1280 } /* option letter okay? */ 1281 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1282 if (!*place) ++optind; 1283 tell(": illegal option -- "); 1284 } 1285 if (*++oli != ':') { /* don't need argument */ 1286 optarg = NULL; 1287 if (!*place) ++optind; 1288 } 1289 else { /* need an argument */ 1290 if (*place) optarg = place; /* no white space */ 1291 else if (nargc <= ++optind) { /* no arg */ 1292 place = EMSG; 1293 tell(": option requires an argument -- "); 1294 } 1295 else optarg = nargv[optind]; /* white space */ 1296 place = EMSG; 1297 ++optind; 1298 } 1299 return(optopt); /* dump back option letter */ 1300 } 1301 1302 #endif 1303 /* 1304 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1305 */ 1306 1307 #ifdef NEEDVPRINTF 1308 1309 #define MAXARG 16 1310 1311 vfprintf(fp, fmt, ap) 1312 FILE * fp; 1313 char * fmt; 1314 char ** ap; 1315 { 1316 char * bp[MAXARG]; 1317 int i = 0; 1318 1319 while (*ap && i < MAXARG) 1320 bp[i++] = *ap++; 1321 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1322 bp[4], bp[5], bp[6], bp[7], 1323 bp[8], bp[9], bp[10], bp[11], 1324 bp[12], bp[13], bp[14], bp[15]); 1325 } 1326 1327 vsprintf(s, fmt, ap) 1328 char * s; 1329 char * fmt; 1330 char ** ap; 1331 { 1332 char * bp[MAXARG]; 1333 int i = 0; 1334 1335 while (*ap && i < MAXARG) 1336 bp[i++] = *ap++; 1337 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1338 bp[4], bp[5], bp[6], bp[7], 1339 bp[8], bp[9], bp[10], bp[11], 1340 bp[12], bp[13], bp[14], bp[15]); 1341 } 1342 1343 #endif 1344 /* 1345 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 1346 ** 1347 ** Parameters: 1348 ** shell -- the user's shell from /etc/passwd 1349 ** 1350 ** Returns: 1351 ** TRUE -- if it is ok to use this for unrestricted access. 1352 ** FALSE -- if the shell is restricted. 1353 */ 1354 1355 #ifndef _PATH_SHELLS 1356 # define _PATH_SHELLS "/etc/shells" 1357 #endif 1358 #ifndef _PATH_BSHELL 1359 # define _PATH_BSHELL "/bin/sh" 1360 #endif 1361 #ifndef _PATH_CSHELL 1362 # define _PATH_CSHELL "/bin/csh" 1363 #endif 1364 1365 bool 1366 usershellok(shell) 1367 char *shell; 1368 { 1369 #if HASGETUSERSHELL 1370 register char *p; 1371 extern char *getusershell(); 1372 1373 setusershell(); 1374 while ((p = getusershell()) != NULL) 1375 if (strcmp(p, shell) == 0) 1376 break; 1377 endusershell(); 1378 return p != NULL; 1379 #else 1380 register FILE *shellf; 1381 char buf[MAXLINE]; 1382 1383 shellf = fopen(_PATH_SHELLS, "r"); 1384 if (shellf == NULL) 1385 { 1386 /* no /etc/shells; see if it is one of the std shells */ 1387 return (strcmp(shell, _PATH_CSHELL) == 0 || 1388 strcmp(shell, _PATH_BSHELL) == 0); 1389 } 1390 1391 while (fgets(buf, sizeof buf, shellf) != NULL) 1392 { 1393 register char *p, *q; 1394 1395 p = buf; 1396 while (*p != '\0' && *p != '#' && *p != '/') 1397 p++; 1398 if (*p == '#' || *p == '\0') 1399 continue; 1400 q = p; 1401 while (*p != '\0' && *p != '#' && !isspace(*p)) 1402 p++; 1403 *p = '\0'; 1404 if (strcmp(shell, q) == 0) 1405 { 1406 fclose(shellf); 1407 return TRUE; 1408 } 1409 } 1410 fclose(shellf); 1411 return FALSE; 1412 #endif 1413 } 1414 /* 1415 ** FREESPACE -- see how much free space is on the queue filesystem 1416 ** 1417 ** Only implemented if you have statfs. 1418 ** 1419 ** Parameters: 1420 ** dir -- the directory in question. 1421 ** bsize -- a variable into which the filesystem 1422 ** block size is stored. 1423 ** 1424 ** Returns: 1425 ** The number of bytes free on the queue filesystem. 1426 ** -1 if the statfs call fails. 1427 ** 1428 ** Side effects: 1429 ** Puts the filesystem block size into bsize. 1430 */ 1431 1432 #ifdef HASSTATFS 1433 # undef HASUSTAT 1434 #endif 1435 1436 #if defined(HASUSTAT) 1437 # include <ustat.h> 1438 #endif 1439 1440 #ifdef HASSTATFS 1441 # if defined(IRIX) || defined(apollo) || defined(_SCO_unix_) || defined(UMAXV) || defined(DGUX) || defined(_AIX3) 1442 # include <sys/statfs.h> 1443 # else 1444 # if (defined(sun) && !defined(BSD)) || defined(__hpux) || defined(_CONVEX_SOURCE) || defined(NeXT) || defined(_AUX_SOURCE) || defined(MACH386) 1445 # include <sys/vfs.h> 1446 # else 1447 # include <sys/mount.h> 1448 # endif 1449 # endif 1450 #endif 1451 1452 long 1453 freespace(dir, bsize) 1454 char *dir; 1455 long *bsize; 1456 { 1457 #if defined(HASSTATFS) || defined(HASUSTAT) 1458 # if defined(HASUSTAT) 1459 struct ustat fs; 1460 struct stat statbuf; 1461 # define FSBLOCKSIZE DEV_BSIZE 1462 # define f_bavail f_tfree 1463 # else 1464 # if defined(ultrix) 1465 struct fs_data fs; 1466 # define f_bavail fd_bfreen 1467 # define FSBLOCKSIZE fs.fd_bsize 1468 # else 1469 struct statfs fs; 1470 # define FSBLOCKSIZE fs.f_bsize 1471 # if defined(_SCO_unix_) || defined(IRIX) 1472 # define f_bavail f_bfree 1473 # endif 1474 # endif 1475 # endif 1476 extern int errno; 1477 1478 # if defined(HASUSTAT) 1479 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 1480 # else 1481 # if defined(IRIX) || defined(apollo) || defined(UMAXV) || defined(DGUX) 1482 if (statfs(dir, &fs, sizeof fs, 0) == 0) 1483 # else 1484 # if defined(ultrix) 1485 if (statfs(dir, &fs) > 0) 1486 # else 1487 if (statfs(dir, &fs) == 0) 1488 # endif 1489 # endif 1490 # endif 1491 { 1492 if (bsize != NULL) 1493 *bsize = FSBLOCKSIZE; 1494 return (fs.f_bavail); 1495 } 1496 #endif 1497 return (-1); 1498 } 1499 /* 1500 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 1501 ** 1502 ** Only implemented if you have statfs. 1503 ** 1504 ** Parameters: 1505 ** msize -- the size to check against. If zero, we don't yet 1506 ** know how big the message will be, so just check for 1507 ** a "reasonable" amount. 1508 ** 1509 ** Returns: 1510 ** TRUE if there is enough space. 1511 ** FALSE otherwise. 1512 */ 1513 1514 bool 1515 enoughspace(msize) 1516 long msize; 1517 { 1518 long bfree, bsize; 1519 1520 if (MinBlocksFree <= 0 && msize <= 0) 1521 { 1522 if (tTd(4, 80)) 1523 printf("enoughspace: no threshold\n"); 1524 return TRUE; 1525 } 1526 1527 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 1528 { 1529 if (tTd(4, 80)) 1530 printf("enoughspace: bavail=%ld, need=%ld\n", 1531 bfree, msize); 1532 1533 /* convert msize to block count */ 1534 msize = msize / bsize + 1; 1535 if (MinBlocksFree >= 0) 1536 msize += MinBlocksFree; 1537 1538 if (bfree < msize) 1539 { 1540 #ifdef LOG 1541 if (LogLevel > 0) 1542 syslog(LOG_ALERT, 1543 "%s: low on space (have %ld, %s needs %ld in %s)", 1544 CurEnv->e_id, bfree, 1545 CurHostName, msize, QueueDir); 1546 #endif 1547 return FALSE; 1548 } 1549 } 1550 else if (tTd(4, 80)) 1551 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 1552 MinBlocksFree, msize, errstring(errno)); 1553 return TRUE; 1554 } 1555 /* 1556 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 1557 ** 1558 ** This looks at an errno value and tells if this is likely to 1559 ** go away if retried later. 1560 ** 1561 ** Parameters: 1562 ** err -- the errno code to classify. 1563 ** 1564 ** Returns: 1565 ** TRUE if this is probably transient. 1566 ** FALSE otherwise. 1567 */ 1568 1569 bool 1570 transienterror(err) 1571 int err; 1572 { 1573 switch (err) 1574 { 1575 case EIO: /* I/O error */ 1576 case ENXIO: /* Device not configured */ 1577 case EAGAIN: /* Resource temporarily unavailable */ 1578 case ENOMEM: /* Cannot allocate memory */ 1579 case ENODEV: /* Operation not supported by device */ 1580 case ENFILE: /* Too many open files in system */ 1581 case EMFILE: /* Too many open files */ 1582 case ENOSPC: /* No space left on device */ 1583 #ifdef ETIMEDOUT 1584 case ETIMEDOUT: /* Connection timed out */ 1585 #endif 1586 #ifdef ESTALE 1587 case ESTALE: /* Stale NFS file handle */ 1588 #endif 1589 #ifdef ENETDOWN 1590 case ENETDOWN: /* Network is down */ 1591 #endif 1592 #ifdef ENETUNREACH 1593 case ENETUNREACH: /* Network is unreachable */ 1594 #endif 1595 #ifdef ENETRESET 1596 case ENETRESET: /* Network dropped connection on reset */ 1597 #endif 1598 #ifdef ECONNABORTED 1599 case ECONNABORTED: /* Software caused connection abort */ 1600 #endif 1601 #ifdef ECONNRESET 1602 case ECONNRESET: /* Connection reset by peer */ 1603 #endif 1604 #ifdef ENOBUFS 1605 case ENOBUFS: /* No buffer space available */ 1606 #endif 1607 #ifdef ESHUTDOWN 1608 case ESHUTDOWN: /* Can't send after socket shutdown */ 1609 #endif 1610 #ifdef ECONNREFUSED 1611 case ECONNREFUSED: /* Connection refused */ 1612 #endif 1613 #ifdef EHOSTDOWN 1614 case EHOSTDOWN: /* Host is down */ 1615 #endif 1616 #ifdef EHOSTUNREACH 1617 case EHOSTUNREACH: /* No route to host */ 1618 #endif 1619 #ifdef EDQUOT 1620 case EDQUOT: /* Disc quota exceeded */ 1621 #endif 1622 #ifdef EPROCLIM 1623 case EPROCLIM: /* Too many processes */ 1624 #endif 1625 #ifdef EUSERS 1626 case EUSERS: /* Too many users */ 1627 #endif 1628 #ifdef EDEADLK 1629 case EDEADLK: /* Resource deadlock avoided */ 1630 #endif 1631 #ifdef EISCONN 1632 case EISCONN: /* Socket already connected */ 1633 #endif 1634 #ifdef EINPROGRESS 1635 case EINPROGRESS: /* Operation now in progress */ 1636 #endif 1637 #ifdef EALREADY 1638 case EALREADY: /* Operation already in progress */ 1639 #endif 1640 #ifdef EADDRINUSE 1641 case EADDRINUSE: /* Address already in use */ 1642 #endif 1643 #ifdef EADDRNOTAVAIL 1644 case EADDRNOTAVAIL: /* Can't assign requested address */ 1645 #endif 1646 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 1647 case ENOSR: /* Out of streams resources */ 1648 #endif 1649 return TRUE; 1650 } 1651 1652 /* nope, must be permanent */ 1653 return FALSE; 1654 } 1655 /* 1656 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 1657 ** 1658 ** Parameters: 1659 ** fd -- the file descriptor of the file. 1660 ** filename -- the file name (for error messages). 1661 ** ext -- the filename extension. 1662 ** type -- type of the lock. Bits can be: 1663 ** LOCK_EX -- exclusive lock. 1664 ** LOCK_NB -- non-blocking. 1665 ** 1666 ** Returns: 1667 ** TRUE if the lock was acquired. 1668 ** FALSE otherwise. 1669 */ 1670 1671 bool 1672 lockfile(fd, filename, ext, type) 1673 int fd; 1674 char *filename; 1675 char *ext; 1676 int type; 1677 { 1678 # ifndef HASFLOCK 1679 int action; 1680 struct flock lfd; 1681 1682 if (ext == NULL) 1683 ext = ""; 1684 1685 bzero(&lfd, sizeof lfd); 1686 if (bitset(LOCK_UN, type)) 1687 lfd.l_type = F_UNLCK; 1688 else if (bitset(LOCK_EX, type)) 1689 lfd.l_type = F_WRLCK; 1690 else 1691 lfd.l_type = F_RDLCK; 1692 1693 if (bitset(LOCK_NB, type)) 1694 action = F_SETLK; 1695 else 1696 action = F_SETLKW; 1697 1698 if (tTd(55, 60)) 1699 printf("lockfile(%s%s, action=%d, type=%d): ", 1700 filename, ext, action, lfd.l_type); 1701 1702 if (fcntl(fd, action, &lfd) >= 0) 1703 { 1704 if (tTd(55, 60)) 1705 printf("SUCCESS\n"); 1706 return TRUE; 1707 } 1708 1709 if (tTd(55, 60)) 1710 printf("(%s) ", errstring(errno)); 1711 1712 /* 1713 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 1714 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 1715 ** as type "tmp" (that is, served from swap space), the 1716 ** previous fcntl will fail with "Invalid argument" errors. 1717 ** Since this is fairly common during testing, we will assume 1718 ** that this indicates that the lock is successfully grabbed. 1719 */ 1720 1721 if (errno == EINVAL) 1722 { 1723 if (tTd(55, 60)) 1724 printf("SUCCESS\n"); 1725 return TRUE; 1726 } 1727 1728 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 1729 { 1730 int omode = -1; 1731 # ifdef F_GETFL 1732 int oerrno = errno; 1733 1734 (void) fcntl(fd, F_GETFL, &omode); 1735 errno = oerrno; 1736 # endif 1737 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1738 filename, ext, fd, type, omode, geteuid()); 1739 } 1740 # else 1741 if (ext == NULL) 1742 ext = ""; 1743 1744 if (tTd(55, 60)) 1745 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 1746 1747 if (flock(fd, type) >= 0) 1748 { 1749 if (tTd(55, 60)) 1750 printf("SUCCESS\n"); 1751 return TRUE; 1752 } 1753 1754 if (tTd(55, 60)) 1755 printf("(%s) ", errstring(errno)); 1756 1757 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 1758 { 1759 int omode = -1; 1760 # ifdef F_GETFL 1761 int oerrno = errno; 1762 1763 (void) fcntl(fd, F_GETFL, &omode); 1764 errno = oerrno; 1765 # endif 1766 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1767 filename, ext, fd, type, omode, geteuid()); 1768 } 1769 # endif 1770 if (tTd(55, 60)) 1771 printf("FAIL\n"); 1772 return FALSE; 1773 } 1774 /* 1775 ** GETCFNAME -- return the name of the .cf file. 1776 ** 1777 ** Some systems (e.g., NeXT) determine this dynamically. 1778 */ 1779 1780 char * 1781 getcfname() 1782 { 1783 if (ConfFile != NULL) 1784 return ConfFile; 1785 #ifdef NETINFO 1786 { 1787 extern char *ni_propval(); 1788 char *cflocation; 1789 1790 cflocation = ni_propval("/locations/sendmail", "sendmail.cf"); 1791 if (cflocation != NULL) 1792 return cflocation; 1793 } 1794 #endif 1795 return _PATH_SENDMAILCF; 1796 } 1797 /* 1798 ** SETVENDOR -- process vendor code from V configuration line 1799 ** 1800 ** Parameters: 1801 ** vendor -- string representation of vendor. 1802 ** 1803 ** Returns: 1804 ** TRUE -- if ok. 1805 ** FALSE -- if vendor code could not be processed. 1806 ** 1807 ** Side Effects: 1808 ** It is reasonable to set mode flags here to tweak 1809 ** processing in other parts of the code if necessary. 1810 ** For example, if you are a vendor that uses $%y to 1811 ** indicate YP lookups, you could enable that here. 1812 */ 1813 1814 bool 1815 setvendor(vendor) 1816 char *vendor; 1817 { 1818 if (strcasecmp(vendor, "Berkeley") == 0) 1819 return TRUE; 1820 1821 /* add vendor extensions here */ 1822 1823 return FALSE; 1824 } 1825 /* 1826 ** STRTOL -- convert string to long integer 1827 ** 1828 ** For systems that don't have it in the C library. 1829 */ 1830 1831 #ifdef NEEDSTRTOL 1832 1833 long 1834 strtol(p, ep, b) 1835 char *p; 1836 char **ep; 1837 int b; 1838 { 1839 long l = 0; 1840 char c; 1841 char maxd; 1842 int neg = 1; 1843 1844 maxd = (b > 10) ? '9' : b + '0'; 1845 1846 if (p && *p == '-') { 1847 neg = -1; 1848 p++; 1849 } 1850 while (p && (c = *p)) { 1851 if (c >= '0' && c <= maxd) { 1852 l = l*b + *p++ - '0'; 1853 continue; 1854 } 1855 if (c >= 'A' && c <= 'Z') 1856 c -= 'A' + 'a'; 1857 c = c - 'a' + 10; 1858 if (b > c) { 1859 l = l*b + c; 1860 p++; 1861 continue; 1862 } 1863 break; 1864 } 1865 l *= neg; 1866 if (ep) 1867 *ep = p; 1868 return l; 1869 } 1870 1871 #endif 1872 /* 1873 ** SOLARIS_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 1874 ** 1875 ** Solaris versions prior through 2.3 don't properly deliver a 1876 ** canonical h_name field. This tries to work around it. 1877 */ 1878 1879 #ifdef SOLARIS 1880 1881 struct hostent * 1882 solaris_gethostbyname(name) 1883 const char *name; 1884 { 1885 # ifdef SOLARIS_2_3 1886 static struct hostent hp; 1887 static char buf[1000]; 1888 extern struct hostent *_switch_gethostbyname_r(); 1889 1890 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 1891 # else 1892 extern struct hostent *__switch_gethostbyname(); 1893 1894 return __switch_gethostbyname(name); 1895 # endif 1896 } 1897 1898 struct hostent * 1899 solaris_gethostbyaddr(addr, len, type) 1900 const char *addr; 1901 int len; 1902 int type; 1903 { 1904 # ifdef SOLARIS_2_3 1905 static struct hostent hp; 1906 static char buf[1000]; 1907 extern struct hostent *_switch_gethostbyaddr_r(); 1908 1909 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 1910 # else 1911 extern struct hostent *__switch_gethostbyaddr(); 1912 1913 return __switch_gethostbyaddr(addr, len, type); 1914 # endif 1915 } 1916 1917 #endif 1918 /* 1919 ** NI_PROPVAL -- netinfo property value lookup routine 1920 ** 1921 ** Parameters: 1922 ** directory -- the Netinfo directory name. 1923 ** propname -- the Netinfo property name. 1924 ** 1925 ** Returns: 1926 ** NULL -- if: 1927 ** 1. the directory is not found 1928 ** 2. the property name is not found 1929 ** 3. the property contains multiple values 1930 ** 4. some error occured 1931 ** else -- the location of the config file. 1932 ** 1933 ** Notes: 1934 ** Caller should free the return value of ni_proval 1935 */ 1936 1937 #ifdef NETINFO 1938 1939 # include <netinfo/ni.h> 1940 1941 # define LOCAL_NETINFO_DOMAIN "." 1942 # define PARENT_NETINFO_DOMAIN ".." 1943 # define MAX_NI_LEVELS 256 1944 1945 char * 1946 ni_propval(directory, propname) 1947 char *directory; 1948 char *propname; 1949 { 1950 char *propval; 1951 int i; 1952 void *ni = NULL; 1953 void *lastni = NULL; 1954 ni_status nis; 1955 ni_id nid; 1956 ni_namelist ninl; 1957 1958 /* 1959 ** If the passed directory and property name are found 1960 ** in one of netinfo domains we need to search (starting 1961 ** from the local domain moving all the way back to the 1962 ** root domain) set propval to the property's value 1963 ** and return it. 1964 */ 1965 1966 for (i = 0; i < MAX_NI_LEVELS; ++i) 1967 { 1968 if (i == 0) 1969 { 1970 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 1971 } 1972 else 1973 { 1974 if (lastni != NULL) 1975 ni_free(lastni); 1976 lastni = ni; 1977 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 1978 } 1979 1980 /* 1981 ** Don't bother if we didn't get a handle on a 1982 ** proper domain. This is not necessarily an error. 1983 ** We would get a positive ni_status if, for instance 1984 ** we never found the directory or property and tried 1985 ** to open the parent of the root domain! 1986 */ 1987 1988 if (nis != 0) 1989 break; 1990 1991 /* 1992 ** Find the path to the server information. 1993 */ 1994 1995 if (ni_pathsearch(ni, &nid, directory) != 0) 1996 continue; 1997 1998 /* 1999 ** Find "host" information. 2000 */ 2001 2002 if (ni_lookupprop(ni, &nid, propname, &ninl) != 0) 2003 continue; 2004 2005 /* 2006 ** If there's only one name in 2007 ** the list, assume we've got 2008 ** what we want. 2009 */ 2010 2011 if (ninl.ni_namelist_len == 1) 2012 { 2013 propval = ni_name_dup(ninl.ni_namelist_val[0]); 2014 break; 2015 } 2016 } 2017 2018 /* 2019 ** Clean up. 2020 */ 2021 2022 if (ni != NULL) 2023 ni_free(ni); 2024 if (lastni != NULL && ni != lastni) 2025 ni_free(lastni); 2026 2027 return propval; 2028 } 2029 2030 #endif /* NETINFO */ 2031