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 8.79 (Berkeley) 03/03/94"; 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 #define LA_PROCSTR 7 /* read string ("1.17") from /proc/loadavg */ 606 607 /* do guesses based on general OS type */ 608 #ifndef LA_TYPE 609 # define LA_TYPE LA_ZERO 610 #endif 611 612 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 613 614 #include <nlist.h> 615 616 #ifndef LA_AVENRUN 617 # ifdef SYSTEM5 618 # define LA_AVENRUN "avenrun" 619 # else 620 # define LA_AVENRUN "_avenrun" 621 # endif 622 #endif 623 624 /* _PATH_UNIX should be defined in <paths.h> */ 625 #ifndef _PATH_UNIX 626 # if defined(SYSTEM5) 627 # define _PATH_UNIX "/unix" 628 # else 629 # define _PATH_UNIX "/vmunix" 630 # endif 631 #endif 632 633 struct nlist Nl[] = 634 { 635 { LA_AVENRUN }, 636 #define X_AVENRUN 0 637 { 0 }, 638 }; 639 640 #ifndef FSHIFT 641 # if defined(unixpc) 642 # define FSHIFT 5 643 # endif 644 645 # if defined(__alpha) 646 # define FSHIFT 10 647 # endif 648 649 # if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 650 # define FSHIFT 8 651 # endif 652 #endif 653 654 #if ((LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT)) && !defined(FSCALE) 655 # define FSCALE (1 << FSHIFT) 656 #endif 657 658 getla() 659 { 660 static int kmem = -1; 661 #if LA_TYPE == LA_INT 662 long avenrun[3]; 663 #else 664 # if LA_TYPE == LA_SHORT 665 short avenrun[3]; 666 # else 667 double avenrun[3]; 668 # endif 669 #endif 670 extern off_t lseek(); 671 extern int errno; 672 673 if (kmem < 0) 674 { 675 kmem = open("/dev/kmem", 0, 0); 676 if (kmem < 0) 677 { 678 if (tTd(3, 1)) 679 printf("getla: open(/dev/kmem): %s\n", 680 errstring(errno)); 681 return (-1); 682 } 683 (void) fcntl(kmem, F_SETFD, 1); 684 if (nlist(_PATH_UNIX, Nl) < 0) 685 { 686 if (tTd(3, 1)) 687 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 688 errstring(errno)); 689 return (-1); 690 } 691 if (Nl[X_AVENRUN].n_value == 0) 692 { 693 if (tTd(3, 1)) 694 printf("getla: nlist(%s, %s) ==> 0\n", 695 _PATH_UNIX, LA_AVENRUN); 696 return (-1); 697 } 698 } 699 if (tTd(3, 20)) 700 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 701 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, 0) == -1 || 702 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 703 { 704 /* thank you Ian */ 705 if (tTd(3, 1)) 706 printf("getla: lseek or read: %s\n", errstring(errno)); 707 return (-1); 708 } 709 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 710 if (tTd(3, 5)) 711 { 712 printf("getla: avenrun = %d", avenrun[0]); 713 if (tTd(3, 15)) 714 printf(", %d, %d", avenrun[1], avenrun[2]); 715 printf("\n"); 716 } 717 if (tTd(3, 1)) 718 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 719 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 720 #else 721 if (tTd(3, 5)) 722 { 723 printf("getla: avenrun = %g", avenrun[0]); 724 if (tTd(3, 15)) 725 printf(", %g, %g", avenrun[1], avenrun[2]); 726 printf("\n"); 727 } 728 if (tTd(3, 1)) 729 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 730 return ((int) (avenrun[0] + 0.5)); 731 #endif 732 } 733 734 #else 735 #if LA_TYPE == LA_SUBR 736 737 #ifdef DGUX 738 739 #include <sys/dg_sys_info.h> 740 741 int getla() 742 { 743 struct dg_sys_info_load_info load_info; 744 745 dg_sys_info((long *)&load_info, 746 DG_SYS_INFO_LOAD_INFO_TYPE, DG_SYS_INFO_LOAD_VERSION_0); 747 748 return((int) (load_info.one_minute + 0.5)); 749 } 750 751 #else 752 753 getla() 754 { 755 double avenrun[3]; 756 757 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 758 { 759 if (tTd(3, 1)) 760 perror("getla: getloadavg failed:"); 761 return (-1); 762 } 763 if (tTd(3, 1)) 764 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 765 return ((int) (avenrun[0] + 0.5)); 766 } 767 768 #endif /* DGUX */ 769 #else 770 #if LA_TYPE == LA_MACH 771 772 /* 773 ** This has been tested on NEXTSTEP release 2.1/3.X. 774 */ 775 776 #if defined(NX_CURRENT_COMPILER_RELEASE) && NX_CURRENT_COMPILER_RELEASE > NX_COMPILER_RELEASE_3_0 777 # include <mach/mach.h> 778 #else 779 # include <mach.h> 780 #endif 781 782 getla() 783 { 784 processor_set_t default_set; 785 kern_return_t error; 786 unsigned int info_count; 787 struct processor_set_basic_info info; 788 host_t host; 789 790 error = processor_set_default(host_self(), &default_set); 791 if (error != KERN_SUCCESS) 792 return -1; 793 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 794 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 795 &host, (processor_set_info_t)&info, 796 &info_count) != KERN_SUCCESS) 797 { 798 return -1; 799 } 800 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 801 } 802 803 804 #else 805 #if LA_TYPE == LA_PROC 806 807 /* 808 ** Read /proc/loadavg for the load average. This is assumed to be 809 ** in a format like "0.15 0.12 0.06". 810 ** 811 ** Initially intended for Linux. This has been in the kernel 812 ** since at least 0.99.15. 813 */ 814 815 # ifndef _PATH_LOADAVG 816 # define _PATH_LOADAVG "/proc/loadavg" 817 # endif 818 819 int 820 getla() 821 { 822 register double avenrun; 823 register int result; 824 static FILE *fp = NULL; 825 826 *avenrun = 0.0; 827 828 if (fp == NULL) 829 { 830 fp = fopen(_PATH_LOADAVG, "r"); 831 if (fp == NULL) 832 { 833 if (tTd(3, 2)) 834 printf("getla: fopen(%s): %s\n", 835 _PATH_LOADAVG, errstring(errno)); 836 return -1; 837 } 838 } 839 (void) rewind(fp); 840 result = fscanf(fp, "%lf", &avenrun); 841 if (result != 1) 842 { 843 if (tTd(3, 2)) 844 printf("getla: fscanf() = %d: %s\n", 845 result, errstring(errno)); 846 return -1; 847 } 848 849 if (tTd(3, 1)) 850 printf("getla(): %.2f\n", avenrun); 851 852 return ((int) (avenrun + 0.5)); 853 } 854 855 #else 856 857 getla() 858 { 859 if (tTd(3, 1)) 860 printf("getla: ZERO\n"); 861 return (0); 862 } 863 864 #endif 865 #endif 866 #endif 867 #endif 868 869 870 /* 871 * Copyright 1989 Massachusetts Institute of Technology 872 * 873 * Permission to use, copy, modify, distribute, and sell this software and its 874 * documentation for any purpose is hereby granted without fee, provided that 875 * the above copyright notice appear in all copies and that both that 876 * copyright notice and this permission notice appear in supporting 877 * documentation, and that the name of M.I.T. not be used in advertising or 878 * publicity pertaining to distribution of the software without specific, 879 * written prior permission. M.I.T. makes no representations about the 880 * suitability of this software for any purpose. It is provided "as is" 881 * without express or implied warranty. 882 * 883 * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 884 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T. 885 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 886 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 887 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 888 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 889 * 890 * Authors: Many and varied... 891 */ 892 893 /* Non Apollo stuff removed by Don Lewis 11/15/93 */ 894 #ifndef lint 895 static char rcsid[] = "@(#)$Id: getloadavg.c,v 1.16 1991/06/21 12:51:15 paul Exp $"; 896 #endif /* !lint */ 897 898 #ifdef apollo 899 # undef volatile 900 # include <apollo/base.h> 901 902 /* ARGSUSED */ 903 int getloadavg( call_data ) 904 caddr_t call_data; /* pointer to (double) return value */ 905 { 906 double *avenrun = (double *) call_data; 907 int i; 908 status_$t st; 909 long loadav[3]; 910 proc1_$get_loadav(loadav, &st); 911 *avenrun = loadav[0] / (double) (1 << 16); 912 return(0); 913 } 914 # endif /* apollo */ 915 /* 916 ** SHOULDQUEUE -- should this message be queued or sent? 917 ** 918 ** Compares the message cost to the load average to decide. 919 ** 920 ** Parameters: 921 ** pri -- the priority of the message in question. 922 ** ctime -- the message creation time. 923 ** 924 ** Returns: 925 ** TRUE -- if this message should be queued up for the 926 ** time being. 927 ** FALSE -- if the load is low enough to send this message. 928 ** 929 ** Side Effects: 930 ** none. 931 */ 932 933 bool 934 shouldqueue(pri, ctime) 935 long pri; 936 time_t ctime; 937 { 938 if (CurrentLA < QueueLA) 939 return (FALSE); 940 if (CurrentLA >= RefuseLA) 941 return (TRUE); 942 return (pri > (QueueFactor / (CurrentLA - QueueLA + 1))); 943 } 944 /* 945 ** REFUSECONNECTIONS -- decide if connections should be refused 946 ** 947 ** Parameters: 948 ** none. 949 ** 950 ** Returns: 951 ** TRUE if incoming SMTP connections should be refused 952 ** (for now). 953 ** FALSE if we should accept new work. 954 ** 955 ** Side Effects: 956 ** none. 957 */ 958 959 bool 960 refuseconnections() 961 { 962 #ifdef XLA 963 if (!xla_smtp_ok()) 964 return TRUE; 965 #endif 966 967 /* this is probably too simplistic */ 968 return (CurrentLA >= RefuseLA); 969 } 970 /* 971 ** SETPROCTITLE -- set process title for ps 972 ** 973 ** Parameters: 974 ** fmt -- a printf style format string. 975 ** a, b, c -- possible parameters to fmt. 976 ** 977 ** Returns: 978 ** none. 979 ** 980 ** Side Effects: 981 ** Clobbers argv of our main procedure so ps(1) will 982 ** display the title. 983 */ 984 985 #ifdef SETPROCTITLE 986 # ifdef HASSETPROCTITLE 987 *** ERROR *** Cannot have both SETPROCTITLE and HASSETPROCTITLE defined 988 # endif 989 # ifdef __hpux 990 # include <sys/pstat.h> 991 # endif 992 # ifdef BSD4_4 993 # include <machine/vmparam.h> 994 # include <sys/exec.h> 995 # ifdef __bsdi__ 996 # undef PS_STRINGS /* BSDI 1.0 doesn't do PS_STRINGS as we expect */ 997 # define PROCTITLEPAD '\0' 998 # endif 999 # ifdef PS_STRINGS 1000 # define SETPROC_STATIC static 1001 # endif 1002 # endif 1003 # ifndef SETPROC_STATIC 1004 # define SETPROC_STATIC 1005 # endif 1006 #endif 1007 1008 #ifndef PROCTITLEPAD 1009 # define PROCTITLEPAD ' ' 1010 #endif 1011 1012 #ifndef HASSETPROCTITLE 1013 1014 /*VARARGS1*/ 1015 #ifdef __STDC__ 1016 setproctitle(char *fmt, ...) 1017 #else 1018 setproctitle(fmt, va_alist) 1019 char *fmt; 1020 va_dcl 1021 #endif 1022 { 1023 # ifdef SETPROCTITLE 1024 register char *p; 1025 register int i; 1026 SETPROC_STATIC char buf[MAXLINE]; 1027 VA_LOCAL_DECL 1028 # ifdef __hpux 1029 union pstun pst; 1030 # endif 1031 extern char **Argv; 1032 extern char *LastArgv; 1033 1034 p = buf; 1035 1036 /* print sendmail: heading for grep */ 1037 (void) strcpy(p, "sendmail: "); 1038 p += strlen(p); 1039 1040 /* print the argument string */ 1041 VA_START(fmt); 1042 (void) vsprintf(p, fmt, ap); 1043 VA_END; 1044 1045 i = strlen(buf); 1046 1047 # ifdef __hpux 1048 pst.pst_command = buf; 1049 pstat(PSTAT_SETCMD, pst, i, 0, 0); 1050 # else 1051 # ifdef PS_STRINGS 1052 PS_STRINGS->ps_nargvstr = 1; 1053 PS_STRINGS->ps_argvstr = buf; 1054 # else 1055 if (i > LastArgv - Argv[0] - 2) 1056 { 1057 i = LastArgv - Argv[0] - 2; 1058 buf[i] = '\0'; 1059 } 1060 (void) strcpy(Argv[0], buf); 1061 p = &Argv[0][i]; 1062 while (p < LastArgv) 1063 *p++ = PROCTITLEPAD; 1064 # endif 1065 # endif 1066 # endif /* SETPROCTITLE */ 1067 } 1068 1069 #endif 1070 /* 1071 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 1072 ** 1073 ** Parameters: 1074 ** none. 1075 ** 1076 ** Returns: 1077 ** none. 1078 ** 1079 ** Side Effects: 1080 ** Picks up extant zombies. 1081 */ 1082 1083 void 1084 reapchild() 1085 { 1086 int olderrno = errno; 1087 # ifdef HASWAITPID 1088 auto int status; 1089 int count; 1090 int pid; 1091 1092 count = 0; 1093 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 1094 { 1095 if (count++ > 1000) 1096 { 1097 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 1098 pid, status); 1099 break; 1100 } 1101 } 1102 # else 1103 # ifdef WNOHANG 1104 union wait status; 1105 1106 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 1107 continue; 1108 # else /* WNOHANG */ 1109 auto int status; 1110 1111 while (wait(&status) > 0) 1112 continue; 1113 # endif /* WNOHANG */ 1114 # endif 1115 # ifdef SYS5SIGNALS 1116 (void) setsignal(SIGCHLD, reapchild); 1117 # endif 1118 errno = olderrno; 1119 } 1120 /* 1121 ** UNSETENV -- remove a variable from the environment 1122 ** 1123 ** Not needed on newer systems. 1124 ** 1125 ** Parameters: 1126 ** name -- the string name of the environment variable to be 1127 ** deleted from the current environment. 1128 ** 1129 ** Returns: 1130 ** none. 1131 ** 1132 ** Globals: 1133 ** environ -- a pointer to the current environment. 1134 ** 1135 ** Side Effects: 1136 ** Modifies environ. 1137 */ 1138 1139 #ifndef HASUNSETENV 1140 1141 void 1142 unsetenv(name) 1143 char *name; 1144 { 1145 extern char **environ; 1146 register char **pp; 1147 int len = strlen(name); 1148 1149 for (pp = environ; *pp != NULL; pp++) 1150 { 1151 if (strncmp(name, *pp, len) == 0 && 1152 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1153 break; 1154 } 1155 1156 for (; *pp != NULL; pp++) 1157 *pp = pp[1]; 1158 } 1159 1160 #endif 1161 /* 1162 ** GETDTABLESIZE -- return number of file descriptors 1163 ** 1164 ** Only on non-BSD systems 1165 ** 1166 ** Parameters: 1167 ** none 1168 ** 1169 ** Returns: 1170 ** size of file descriptor table 1171 ** 1172 ** Side Effects: 1173 ** none 1174 */ 1175 1176 #ifdef SOLARIS 1177 # include <sys/resource.h> 1178 #endif 1179 1180 int 1181 getdtsize() 1182 { 1183 #ifdef RLIMIT_NOFILE 1184 struct rlimit rl; 1185 1186 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1187 return rl.rlim_cur; 1188 #endif 1189 1190 # ifdef HASGETDTABLESIZE 1191 return getdtablesize(); 1192 # else 1193 # ifdef _SC_OPEN_MAX 1194 return sysconf(_SC_OPEN_MAX); 1195 # else 1196 return NOFILE; 1197 # endif 1198 # endif 1199 } 1200 /* 1201 ** UNAME -- get the UUCP name of this system. 1202 */ 1203 1204 #ifndef HASUNAME 1205 1206 int 1207 uname(name) 1208 struct utsname *name; 1209 { 1210 FILE *file; 1211 char *n; 1212 1213 name->nodename[0] = '\0'; 1214 1215 /* try /etc/whoami -- one line with the node name */ 1216 if ((file = fopen("/etc/whoami", "r")) != NULL) 1217 { 1218 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1219 (void) fclose(file); 1220 n = strchr(name->nodename, '\n'); 1221 if (n != NULL) 1222 *n = '\0'; 1223 if (name->nodename[0] != '\0') 1224 return (0); 1225 } 1226 1227 /* try /usr/include/whoami.h -- has a #define somewhere */ 1228 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1229 { 1230 char buf[MAXLINE]; 1231 1232 while (fgets(buf, MAXLINE, file) != NULL) 1233 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1234 NODE_LENGTH, name->nodename) > 0) 1235 break; 1236 (void) fclose(file); 1237 if (name->nodename[0] != '\0') 1238 return (0); 1239 } 1240 1241 #ifdef TRUST_POPEN 1242 /* 1243 ** Popen is known to have security holes. 1244 */ 1245 1246 /* try uuname -l to return local name */ 1247 if ((file = popen("uuname -l", "r")) != NULL) 1248 { 1249 (void) fgets(name, NODE_LENGTH + 1, file); 1250 (void) pclose(file); 1251 n = strchr(name, '\n'); 1252 if (n != NULL) 1253 *n = '\0'; 1254 if (name->nodename[0] != '\0') 1255 return (0); 1256 } 1257 #endif 1258 1259 return (-1); 1260 } 1261 #endif /* HASUNAME */ 1262 /* 1263 ** INITGROUPS -- initialize groups 1264 ** 1265 ** Stub implementation for System V style systems 1266 */ 1267 1268 #ifndef HASINITGROUPS 1269 1270 initgroups(name, basegid) 1271 char *name; 1272 int basegid; 1273 { 1274 return 0; 1275 } 1276 1277 #endif 1278 /* 1279 ** SETSID -- set session id (for non-POSIX systems) 1280 */ 1281 1282 #ifndef HASSETSID 1283 1284 pid_t 1285 setsid __P ((void)) 1286 { 1287 #ifdef TIOCNOTTY 1288 int fd; 1289 1290 fd = open("/dev/tty", 2); 1291 if (fd >= 0) 1292 { 1293 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1294 (void) close(fd); 1295 } 1296 #endif /* TIOCNOTTY */ 1297 # ifdef SYS5SETPGRP 1298 return setpgrp(); 1299 # else 1300 return setpgid(0, getpid()); 1301 # endif 1302 } 1303 1304 #endif 1305 /* 1306 ** DGUX_INET_ADDR -- inet_addr for DG/UX 1307 ** 1308 ** Data General DG/UX version of inet_addr returns a struct in_addr 1309 ** instead of a long. This patches things. 1310 */ 1311 1312 #ifdef DGUX 1313 1314 #undef inet_addr 1315 1316 long 1317 dgux_inet_addr(host) 1318 char *host; 1319 { 1320 struct in_addr haddr; 1321 1322 haddr = inet_addr(host); 1323 return haddr.s_addr; 1324 } 1325 1326 #endif 1327 /* 1328 ** GETOPT -- for old systems or systems with bogus implementations 1329 */ 1330 1331 #ifdef NEEDGETOPT 1332 1333 /* 1334 * Copyright (c) 1985 Regents of the University of California. 1335 * All rights reserved. The Berkeley software License Agreement 1336 * specifies the terms and conditions for redistribution. 1337 */ 1338 1339 1340 /* 1341 ** this version hacked to add `atend' flag to allow state machine 1342 ** to reset if invoked by the program to scan args for a 2nd time 1343 */ 1344 1345 #if defined(LIBC_SCCS) && !defined(lint) 1346 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1347 #endif /* LIBC_SCCS and not lint */ 1348 1349 #include <stdio.h> 1350 1351 /* 1352 * get option letter from argument vector 1353 */ 1354 #ifdef _CONVEX_SOURCE 1355 extern int optind, opterr; 1356 #else 1357 int opterr = 1; /* if error message should be printed */ 1358 int optind = 1; /* index into parent argv vector */ 1359 #endif 1360 int optopt; /* character checked for validity */ 1361 char *optarg; /* argument associated with option */ 1362 1363 #define BADCH (int)'?' 1364 #define EMSG "" 1365 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1366 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1367 1368 getopt(nargc,nargv,ostr) 1369 int nargc; 1370 char *const *nargv; 1371 const char *ostr; 1372 { 1373 static char *place = EMSG; /* option letter processing */ 1374 static char atend = 0; 1375 register char *oli; /* option letter list index */ 1376 1377 if (atend) { 1378 atend = 0; 1379 place = EMSG; 1380 } 1381 if(!*place) { /* update scanning pointer */ 1382 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1383 atend++; 1384 return(EOF); 1385 } 1386 if (*place == '-') { /* found "--" */ 1387 ++optind; 1388 atend++; 1389 return(EOF); 1390 } 1391 } /* option letter okay? */ 1392 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1393 if (!*place) ++optind; 1394 tell(": illegal option -- "); 1395 } 1396 if (*++oli != ':') { /* don't need argument */ 1397 optarg = NULL; 1398 if (!*place) ++optind; 1399 } 1400 else { /* need an argument */ 1401 if (*place) optarg = place; /* no white space */ 1402 else if (nargc <= ++optind) { /* no arg */ 1403 place = EMSG; 1404 tell(": option requires an argument -- "); 1405 } 1406 else optarg = nargv[optind]; /* white space */ 1407 place = EMSG; 1408 ++optind; 1409 } 1410 return(optopt); /* dump back option letter */ 1411 } 1412 1413 #endif 1414 /* 1415 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1416 */ 1417 1418 #ifdef NEEDVPRINTF 1419 1420 #define MAXARG 16 1421 1422 vfprintf(fp, fmt, ap) 1423 FILE * fp; 1424 char * fmt; 1425 char ** ap; 1426 { 1427 char * bp[MAXARG]; 1428 int i = 0; 1429 1430 while (*ap && i < MAXARG) 1431 bp[i++] = *ap++; 1432 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1433 bp[4], bp[5], bp[6], bp[7], 1434 bp[8], bp[9], bp[10], bp[11], 1435 bp[12], bp[13], bp[14], bp[15]); 1436 } 1437 1438 vsprintf(s, fmt, ap) 1439 char * s; 1440 char * fmt; 1441 char ** ap; 1442 { 1443 char * bp[MAXARG]; 1444 int i = 0; 1445 1446 while (*ap && i < MAXARG) 1447 bp[i++] = *ap++; 1448 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1449 bp[4], bp[5], bp[6], bp[7], 1450 bp[8], bp[9], bp[10], bp[11], 1451 bp[12], bp[13], bp[14], bp[15]); 1452 } 1453 1454 #endif 1455 /* 1456 ** USERSHELLOK -- tell if a user's shell is ok for unrestricted use 1457 ** 1458 ** Parameters: 1459 ** shell -- the user's shell from /etc/passwd 1460 ** 1461 ** Returns: 1462 ** TRUE -- if it is ok to use this for unrestricted access. 1463 ** FALSE -- if the shell is restricted. 1464 */ 1465 1466 #if !HASGETUSERSHELL 1467 1468 # ifndef _PATH_SHELLS 1469 # define _PATH_SHELLS "/etc/shells" 1470 # endif 1471 1472 char *DefaultUserShells[] = 1473 { 1474 "/bin/sh", 1475 "/usr/bin/sh", 1476 "/bin/csh", 1477 "/usr/bin/csh", 1478 #ifdef __hpux 1479 "/bin/rsh", 1480 "/bin/ksh", 1481 "/bin/rksh", 1482 "/bin/pam", 1483 "/usr/bin/keysh", 1484 "/bin/posix/sh", 1485 #endif 1486 NULL 1487 }; 1488 1489 #endif 1490 1491 #define WILDCARD_SHELL "/SENDMAIL/ANY/SHELL/" 1492 1493 bool 1494 usershellok(shell) 1495 char *shell; 1496 { 1497 #if HASGETUSERSHELL 1498 register char *p; 1499 extern char *getusershell(); 1500 1501 setusershell(); 1502 while ((p = getusershell()) != NULL) 1503 if (strcmp(p, shell) == 0 || strcmp(p, WILDCARD_SHELL) == 0) 1504 break; 1505 endusershell(); 1506 return p != NULL; 1507 #else 1508 register FILE *shellf; 1509 char buf[MAXLINE]; 1510 1511 shellf = fopen(_PATH_SHELLS, "r"); 1512 if (shellf == NULL) 1513 { 1514 /* no /etc/shells; see if it is one of the std shells */ 1515 char **d; 1516 1517 for (d = DefaultUserShells; *d != NULL; d++) 1518 { 1519 if (strcmp(shell, *d) == 0) 1520 return TRUE; 1521 } 1522 return FALSE; 1523 } 1524 1525 while (fgets(buf, sizeof buf, shellf) != NULL) 1526 { 1527 register char *p, *q; 1528 1529 p = buf; 1530 while (*p != '\0' && *p != '#' && *p != '/') 1531 p++; 1532 if (*p == '#' || *p == '\0') 1533 continue; 1534 q = p; 1535 while (*p != '\0' && *p != '#' && !isspace(*p)) 1536 p++; 1537 *p = '\0'; 1538 if (strcmp(shell, q) == 0 || strcmp(WILDCARD_SHELL, q) == 0) 1539 { 1540 fclose(shellf); 1541 return TRUE; 1542 } 1543 } 1544 fclose(shellf); 1545 return FALSE; 1546 #endif 1547 } 1548 /* 1549 ** FREESPACE -- see how much free space is on the queue filesystem 1550 ** 1551 ** Only implemented if you have statfs. 1552 ** 1553 ** Parameters: 1554 ** dir -- the directory in question. 1555 ** bsize -- a variable into which the filesystem 1556 ** block size is stored. 1557 ** 1558 ** Returns: 1559 ** The number of bytes free on the queue filesystem. 1560 ** -1 if the statfs call fails. 1561 ** 1562 ** Side effects: 1563 ** Puts the filesystem block size into bsize. 1564 */ 1565 1566 /* statfs types */ 1567 #define SFS_NONE 0 /* no statfs implementation */ 1568 #define SFS_USTAT 1 /* use ustat */ 1569 #define SFS_4ARGS 2 /* use four-argument statfs call */ 1570 #define SFS_VFS 3 /* use <sys/vfs.h> implementation */ 1571 #define SFS_MOUNT 4 /* use <sys/mount.h> implementation */ 1572 #define SFS_STATFS 5 /* use <sys/statfs.h> implementation */ 1573 1574 #ifndef SFS_TYPE 1575 # define SFS_TYPE SFS_NONE 1576 #endif 1577 1578 #if SFS_TYPE == SFS_USTAT 1579 # include <ustat.h> 1580 #endif 1581 #if SFS_TYPE == SFS_4ARGS || SFS_TYPE == SFS_STATFS 1582 # include <sys/statfs.h> 1583 #endif 1584 #if SFS_TYPE == SFS_VFS 1585 # include <sys/vfs.h> 1586 #endif 1587 #if SFS_TYPE == SFS_MOUNT 1588 # include <sys/mount.h> 1589 #endif 1590 1591 long 1592 freespace(dir, bsize) 1593 char *dir; 1594 long *bsize; 1595 { 1596 #if SFS_TYPE != SFS_NONE 1597 # if SFS_TYPE == SFS_USTAT 1598 struct ustat fs; 1599 struct stat statbuf; 1600 # define FSBLOCKSIZE DEV_BSIZE 1601 # define f_bavail f_tfree 1602 # else 1603 # if defined(ultrix) 1604 struct fs_data fs; 1605 # define f_bavail fd_bfreen 1606 # define FSBLOCKSIZE fs.fd_bsize 1607 # else 1608 struct statfs fs; 1609 # define FSBLOCKSIZE fs.f_bsize 1610 # if defined(_SCO_unix_) || defined(IRIX) || defined(apollo) 1611 # define f_bavail f_bfree 1612 # endif 1613 # endif 1614 # endif 1615 extern int errno; 1616 1617 # if SFS_TYPE == SFS_USTAT 1618 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 1619 # else 1620 # if SFS_TYPE == SFS_4ARGS 1621 if (statfs(dir, &fs, sizeof fs, 0) == 0) 1622 # else 1623 # if defined(ultrix) 1624 if (statfs(dir, &fs) > 0) 1625 # else 1626 if (statfs(dir, &fs) == 0) 1627 # endif 1628 # endif 1629 # endif 1630 { 1631 if (bsize != NULL) 1632 *bsize = FSBLOCKSIZE; 1633 return (fs.f_bavail); 1634 } 1635 #endif 1636 return (-1); 1637 } 1638 /* 1639 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 1640 ** 1641 ** Only implemented if you have statfs. 1642 ** 1643 ** Parameters: 1644 ** msize -- the size to check against. If zero, we don't yet 1645 ** know how big the message will be, so just check for 1646 ** a "reasonable" amount. 1647 ** 1648 ** Returns: 1649 ** TRUE if there is enough space. 1650 ** FALSE otherwise. 1651 */ 1652 1653 bool 1654 enoughspace(msize) 1655 long msize; 1656 { 1657 long bfree, bsize; 1658 1659 if (MinBlocksFree <= 0 && msize <= 0) 1660 { 1661 if (tTd(4, 80)) 1662 printf("enoughspace: no threshold\n"); 1663 return TRUE; 1664 } 1665 1666 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 1667 { 1668 if (tTd(4, 80)) 1669 printf("enoughspace: bavail=%ld, need=%ld\n", 1670 bfree, msize); 1671 1672 /* convert msize to block count */ 1673 msize = msize / bsize + 1; 1674 if (MinBlocksFree >= 0) 1675 msize += MinBlocksFree; 1676 1677 if (bfree < msize) 1678 { 1679 #ifdef LOG 1680 if (LogLevel > 0) 1681 syslog(LOG_ALERT, 1682 "%s: low on space (have %ld, %s needs %ld in %s)", 1683 CurEnv->e_id, bfree, 1684 CurHostName, msize, QueueDir); 1685 #endif 1686 return FALSE; 1687 } 1688 } 1689 else if (tTd(4, 80)) 1690 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 1691 MinBlocksFree, msize, errstring(errno)); 1692 return TRUE; 1693 } 1694 /* 1695 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 1696 ** 1697 ** This looks at an errno value and tells if this is likely to 1698 ** go away if retried later. 1699 ** 1700 ** Parameters: 1701 ** err -- the errno code to classify. 1702 ** 1703 ** Returns: 1704 ** TRUE if this is probably transient. 1705 ** FALSE otherwise. 1706 */ 1707 1708 bool 1709 transienterror(err) 1710 int err; 1711 { 1712 switch (err) 1713 { 1714 case EIO: /* I/O error */ 1715 case ENXIO: /* Device not configured */ 1716 case EAGAIN: /* Resource temporarily unavailable */ 1717 case ENOMEM: /* Cannot allocate memory */ 1718 case ENODEV: /* Operation not supported by device */ 1719 case ENFILE: /* Too many open files in system */ 1720 case EMFILE: /* Too many open files */ 1721 case ENOSPC: /* No space left on device */ 1722 #ifdef ETIMEDOUT 1723 case ETIMEDOUT: /* Connection timed out */ 1724 #endif 1725 #ifdef ESTALE 1726 case ESTALE: /* Stale NFS file handle */ 1727 #endif 1728 #ifdef ENETDOWN 1729 case ENETDOWN: /* Network is down */ 1730 #endif 1731 #ifdef ENETUNREACH 1732 case ENETUNREACH: /* Network is unreachable */ 1733 #endif 1734 #ifdef ENETRESET 1735 case ENETRESET: /* Network dropped connection on reset */ 1736 #endif 1737 #ifdef ECONNABORTED 1738 case ECONNABORTED: /* Software caused connection abort */ 1739 #endif 1740 #ifdef ECONNRESET 1741 case ECONNRESET: /* Connection reset by peer */ 1742 #endif 1743 #ifdef ENOBUFS 1744 case ENOBUFS: /* No buffer space available */ 1745 #endif 1746 #ifdef ESHUTDOWN 1747 case ESHUTDOWN: /* Can't send after socket shutdown */ 1748 #endif 1749 #ifdef ECONNREFUSED 1750 case ECONNREFUSED: /* Connection refused */ 1751 #endif 1752 #ifdef EHOSTDOWN 1753 case EHOSTDOWN: /* Host is down */ 1754 #endif 1755 #ifdef EHOSTUNREACH 1756 case EHOSTUNREACH: /* No route to host */ 1757 #endif 1758 #ifdef EDQUOT 1759 case EDQUOT: /* Disc quota exceeded */ 1760 #endif 1761 #ifdef EPROCLIM 1762 case EPROCLIM: /* Too many processes */ 1763 #endif 1764 #ifdef EUSERS 1765 case EUSERS: /* Too many users */ 1766 #endif 1767 #ifdef EDEADLK 1768 case EDEADLK: /* Resource deadlock avoided */ 1769 #endif 1770 #ifdef EISCONN 1771 case EISCONN: /* Socket already connected */ 1772 #endif 1773 #ifdef EINPROGRESS 1774 case EINPROGRESS: /* Operation now in progress */ 1775 #endif 1776 #ifdef EALREADY 1777 case EALREADY: /* Operation already in progress */ 1778 #endif 1779 #ifdef EADDRINUSE 1780 case EADDRINUSE: /* Address already in use */ 1781 #endif 1782 #ifdef EADDRNOTAVAIL 1783 case EADDRNOTAVAIL: /* Can't assign requested address */ 1784 #endif 1785 #ifdef ETXTBSY 1786 case ETXTBSY: /* (Apollo) file locked */ 1787 #endif 1788 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 1789 case ENOSR: /* Out of streams resources */ 1790 #endif 1791 return TRUE; 1792 } 1793 1794 /* nope, must be permanent */ 1795 return FALSE; 1796 } 1797 /* 1798 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 1799 ** 1800 ** Parameters: 1801 ** fd -- the file descriptor of the file. 1802 ** filename -- the file name (for error messages). 1803 ** ext -- the filename extension. 1804 ** type -- type of the lock. Bits can be: 1805 ** LOCK_EX -- exclusive lock. 1806 ** LOCK_NB -- non-blocking. 1807 ** 1808 ** Returns: 1809 ** TRUE if the lock was acquired. 1810 ** FALSE otherwise. 1811 */ 1812 1813 bool 1814 lockfile(fd, filename, ext, type) 1815 int fd; 1816 char *filename; 1817 char *ext; 1818 int type; 1819 { 1820 # if !HASFLOCK 1821 int action; 1822 struct flock lfd; 1823 1824 if (ext == NULL) 1825 ext = ""; 1826 1827 bzero(&lfd, sizeof lfd); 1828 if (bitset(LOCK_UN, type)) 1829 lfd.l_type = F_UNLCK; 1830 else if (bitset(LOCK_EX, type)) 1831 lfd.l_type = F_WRLCK; 1832 else 1833 lfd.l_type = F_RDLCK; 1834 1835 if (bitset(LOCK_NB, type)) 1836 action = F_SETLK; 1837 else 1838 action = F_SETLKW; 1839 1840 if (tTd(55, 60)) 1841 printf("lockfile(%s%s, action=%d, type=%d): ", 1842 filename, ext, action, lfd.l_type); 1843 1844 if (fcntl(fd, action, &lfd) >= 0) 1845 { 1846 if (tTd(55, 60)) 1847 printf("SUCCESS\n"); 1848 return TRUE; 1849 } 1850 1851 if (tTd(55, 60)) 1852 printf("(%s) ", errstring(errno)); 1853 1854 /* 1855 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 1856 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 1857 ** as type "tmp" (that is, served from swap space), the 1858 ** previous fcntl will fail with "Invalid argument" errors. 1859 ** Since this is fairly common during testing, we will assume 1860 ** that this indicates that the lock is successfully grabbed. 1861 */ 1862 1863 if (errno == EINVAL) 1864 { 1865 if (tTd(55, 60)) 1866 printf("SUCCESS\n"); 1867 return TRUE; 1868 } 1869 1870 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 1871 { 1872 int omode = -1; 1873 # ifdef F_GETFL 1874 int oerrno = errno; 1875 1876 (void) fcntl(fd, F_GETFL, &omode); 1877 errno = oerrno; 1878 # endif 1879 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1880 filename, ext, fd, type, omode, geteuid()); 1881 } 1882 # else 1883 if (ext == NULL) 1884 ext = ""; 1885 1886 if (tTd(55, 60)) 1887 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 1888 1889 if (flock(fd, type) >= 0) 1890 { 1891 if (tTd(55, 60)) 1892 printf("SUCCESS\n"); 1893 return TRUE; 1894 } 1895 1896 if (tTd(55, 60)) 1897 printf("(%s) ", errstring(errno)); 1898 1899 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 1900 { 1901 int omode = -1; 1902 # ifdef F_GETFL 1903 int oerrno = errno; 1904 1905 (void) fcntl(fd, F_GETFL, &omode); 1906 errno = oerrno; 1907 # endif 1908 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1909 filename, ext, fd, type, omode, geteuid()); 1910 } 1911 # endif 1912 if (tTd(55, 60)) 1913 printf("FAIL\n"); 1914 return FALSE; 1915 } 1916 /* 1917 ** CHOWNSAFE -- tell if chown is "safe" (executable only by root) 1918 ** 1919 ** Parameters: 1920 ** fd -- the file descriptor to check. 1921 ** 1922 ** Returns: 1923 ** TRUE -- if only root can chown the file to an arbitrary 1924 ** user. 1925 ** FALSE -- if an arbitrary user can give away a file. 1926 */ 1927 1928 bool 1929 chownsafe(fd) 1930 int fd; 1931 { 1932 #ifdef __hpux 1933 char *s; 1934 int tfd; 1935 uid_t o_uid, o_euid; 1936 gid_t o_gid, o_egid; 1937 bool rval; 1938 struct stat stbuf; 1939 1940 o_uid = getuid(); 1941 o_euid = geteuid(); 1942 o_gid = getgid(); 1943 o_egid = getegid(); 1944 fstat(fd, &stbuf); 1945 setresuid(stbuf.st_uid, stbuf.st_uid, -1); 1946 setresgid(stbuf.st_gid, stbuf.st_gid, -1); 1947 s = tmpnam(NULL); 1948 tfd = open(s, O_RDONLY|O_CREAT, 0600); 1949 rval = fchown(tfd, DefUid, DefGid) != 0; 1950 close(tfd); 1951 unlink(s); 1952 setreuid(o_uid, o_euid); 1953 setresgid(o_gid, o_egid, -1); 1954 return rval; 1955 #else 1956 # ifdef _POSIX_CHOWN_RESTRICTED 1957 # if _POSIX_CHOWN_RESTRICTED == -1 1958 return FALSE; 1959 # else 1960 return TRUE; 1961 # endif 1962 # else 1963 # ifdef _PC_CHOWN_RESTRICTED 1964 return fpathconf(fd, _PC_CHOWN_RESTRICTED) > 0; 1965 # else 1966 # ifdef BSD 1967 return TRUE; 1968 # else 1969 return FALSE; 1970 # endif 1971 # endif 1972 # endif 1973 #endif 1974 } 1975 /* 1976 ** GETCFNAME -- return the name of the .cf file. 1977 ** 1978 ** Some systems (e.g., NeXT) determine this dynamically. 1979 */ 1980 1981 char * 1982 getcfname() 1983 { 1984 if (ConfFile != NULL) 1985 return ConfFile; 1986 #ifdef NETINFO 1987 { 1988 extern char *ni_propval(); 1989 char *cflocation; 1990 1991 cflocation = ni_propval("/locations/sendmail", "sendmail.cf"); 1992 if (cflocation != NULL) 1993 return cflocation; 1994 } 1995 #endif 1996 return _PATH_SENDMAILCF; 1997 } 1998 /* 1999 ** SETVENDOR -- process vendor code from V configuration line 2000 ** 2001 ** Parameters: 2002 ** vendor -- string representation of vendor. 2003 ** 2004 ** Returns: 2005 ** TRUE -- if ok. 2006 ** FALSE -- if vendor code could not be processed. 2007 ** 2008 ** Side Effects: 2009 ** It is reasonable to set mode flags here to tweak 2010 ** processing in other parts of the code if necessary. 2011 ** For example, if you are a vendor that uses $%y to 2012 ** indicate YP lookups, you could enable that here. 2013 */ 2014 2015 bool 2016 setvendor(vendor) 2017 char *vendor; 2018 { 2019 if (strcasecmp(vendor, "Berkeley") == 0) 2020 return TRUE; 2021 2022 /* add vendor extensions here */ 2023 2024 return FALSE; 2025 } 2026 /* 2027 ** STRTOL -- convert string to long integer 2028 ** 2029 ** For systems that don't have it in the C library. 2030 ** 2031 ** This is taken verbatim from the 4.4-Lite C library. 2032 */ 2033 2034 #ifdef NEEDSTRTOL 2035 2036 #if defined(LIBC_SCCS) && !defined(lint) 2037 static char sccsid[] = "@(#)strtol.c 8.1 (Berkeley) 6/4/93"; 2038 #endif /* LIBC_SCCS and not lint */ 2039 2040 #include <limits.h> 2041 2042 /* 2043 * Convert a string to a long integer. 2044 * 2045 * Ignores `locale' stuff. Assumes that the upper and lower case 2046 * alphabets and digits are each contiguous. 2047 */ 2048 2049 long 2050 strtol(nptr, endptr, base) 2051 const char *nptr; 2052 char **endptr; 2053 register int base; 2054 { 2055 register const char *s = nptr; 2056 register unsigned long acc; 2057 register int c; 2058 register unsigned long cutoff; 2059 register int neg = 0, any, cutlim; 2060 2061 /* 2062 * Skip white space and pick up leading +/- sign if any. 2063 * If base is 0, allow 0x for hex and 0 for octal, else 2064 * assume decimal; if base is already 16, allow 0x. 2065 */ 2066 do { 2067 c = *s++; 2068 } while (isspace(c)); 2069 if (c == '-') { 2070 neg = 1; 2071 c = *s++; 2072 } else if (c == '+') 2073 c = *s++; 2074 if ((base == 0 || base == 16) && 2075 c == '0' && (*s == 'x' || *s == 'X')) { 2076 c = s[1]; 2077 s += 2; 2078 base = 16; 2079 } 2080 if (base == 0) 2081 base = c == '0' ? 8 : 10; 2082 2083 /* 2084 * Compute the cutoff value between legal numbers and illegal 2085 * numbers. That is the largest legal value, divided by the 2086 * base. An input number that is greater than this value, if 2087 * followed by a legal input character, is too big. One that 2088 * is equal to this value may be valid or not; the limit 2089 * between valid and invalid numbers is then based on the last 2090 * digit. For instance, if the range for longs is 2091 * [-2147483648..2147483647] and the input base is 10, 2092 * cutoff will be set to 214748364 and cutlim to either 2093 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 2094 * a value > 214748364, or equal but the next digit is > 7 (or 8), 2095 * the number is too big, and we will return a range error. 2096 * 2097 * Set any if any `digits' consumed; make it negative to indicate 2098 * overflow. 2099 */ 2100 cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX; 2101 cutlim = cutoff % (unsigned long)base; 2102 cutoff /= (unsigned long)base; 2103 for (acc = 0, any = 0;; c = *s++) { 2104 if (isdigit(c)) 2105 c -= '0'; 2106 else if (isalpha(c)) 2107 c -= isupper(c) ? 'A' - 10 : 'a' - 10; 2108 else 2109 break; 2110 if (c >= base) 2111 break; 2112 if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim) 2113 any = -1; 2114 else { 2115 any = 1; 2116 acc *= base; 2117 acc += c; 2118 } 2119 } 2120 if (any < 0) { 2121 acc = neg ? LONG_MIN : LONG_MAX; 2122 errno = ERANGE; 2123 } else if (neg) 2124 acc = -acc; 2125 if (endptr != 0) 2126 *endptr = (char *)(any ? s - 1 : nptr); 2127 return (acc); 2128 } 2129 2130 #endif 2131 /* 2132 ** SOLARIS_GETHOSTBY{NAME,ADDR} -- compatibility routines for gethostbyXXX 2133 ** 2134 ** Solaris versions prior through 2.3 don't properly deliver a 2135 ** canonical h_name field. This tries to work around it. 2136 */ 2137 2138 #ifdef SOLARIS 2139 2140 struct hostent * 2141 solaris_gethostbyname(name) 2142 const char *name; 2143 { 2144 # ifdef SOLARIS_2_3 2145 static struct hostent hp; 2146 static char buf[1000]; 2147 extern struct hostent *_switch_gethostbyname_r(); 2148 2149 return _switch_gethostbyname_r(name, &hp, buf, sizeof(buf), &h_errno); 2150 # else 2151 extern struct hostent *__switch_gethostbyname(); 2152 2153 return __switch_gethostbyname(name); 2154 # endif 2155 } 2156 2157 struct hostent * 2158 solaris_gethostbyaddr(addr, len, type) 2159 const char *addr; 2160 int len; 2161 int type; 2162 { 2163 # ifdef SOLARIS_2_3 2164 static struct hostent hp; 2165 static char buf[1000]; 2166 extern struct hostent *_switch_gethostbyaddr_r(); 2167 2168 return _switch_gethostbyaddr_r(addr, len, type, &hp, buf, sizeof(buf), &h_errno); 2169 # else 2170 extern struct hostent *__switch_gethostbyaddr(); 2171 2172 return __switch_gethostbyaddr(addr, len, type); 2173 # endif 2174 } 2175 2176 #endif 2177 /* 2178 ** NI_PROPVAL -- netinfo property value lookup routine 2179 ** 2180 ** Parameters: 2181 ** directory -- the Netinfo directory name. 2182 ** propname -- the Netinfo property name. 2183 ** 2184 ** Returns: 2185 ** NULL -- if: 2186 ** 1. the directory is not found 2187 ** 2. the property name is not found 2188 ** 3. the property contains multiple values 2189 ** 4. some error occured 2190 ** else -- the location of the config file. 2191 ** 2192 ** Notes: 2193 ** Caller should free the return value of ni_proval 2194 */ 2195 2196 #ifdef NETINFO 2197 2198 # include <netinfo/ni.h> 2199 2200 # define LOCAL_NETINFO_DOMAIN "." 2201 # define PARENT_NETINFO_DOMAIN ".." 2202 # define MAX_NI_LEVELS 256 2203 2204 char * 2205 ni_propval(directory, propname) 2206 char *directory; 2207 char *propname; 2208 { 2209 char *propval = NULL; 2210 int i; 2211 void *ni = NULL; 2212 void *lastni = NULL; 2213 ni_status nis; 2214 ni_id nid; 2215 ni_namelist ninl; 2216 2217 /* 2218 ** If the passed directory and property name are found 2219 ** in one of netinfo domains we need to search (starting 2220 ** from the local domain moving all the way back to the 2221 ** root domain) set propval to the property's value 2222 ** and return it. 2223 */ 2224 2225 for (i = 0; i < MAX_NI_LEVELS; ++i) 2226 { 2227 if (i == 0) 2228 { 2229 nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni); 2230 } 2231 else 2232 { 2233 if (lastni != NULL) 2234 ni_free(lastni); 2235 lastni = ni; 2236 nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni); 2237 } 2238 2239 /* 2240 ** Don't bother if we didn't get a handle on a 2241 ** proper domain. This is not necessarily an error. 2242 ** We would get a positive ni_status if, for instance 2243 ** we never found the directory or property and tried 2244 ** to open the parent of the root domain! 2245 */ 2246 2247 if (nis != 0) 2248 break; 2249 2250 /* 2251 ** Find the path to the server information. 2252 */ 2253 2254 if (ni_pathsearch(ni, &nid, directory) != 0) 2255 continue; 2256 2257 /* 2258 ** Find "host" information. 2259 */ 2260 2261 if (ni_lookupprop(ni, &nid, propname, &ninl) != 0) 2262 continue; 2263 2264 /* 2265 ** If there's only one name in 2266 ** the list, assume we've got 2267 ** what we want. 2268 */ 2269 2270 if (ninl.ni_namelist_len == 1) 2271 { 2272 propval = ni_name_dup(ninl.ni_namelist_val[0]); 2273 break; 2274 } 2275 } 2276 2277 /* 2278 ** Clean up. 2279 */ 2280 2281 if (ni != NULL) 2282 ni_free(ni); 2283 if (lastni != NULL && ni != lastni) 2284 ni_free(lastni); 2285 2286 return propval; 2287 } 2288 2289 #endif /* NETINFO */ 2290 /* 2291 ** HARD_SYSLOG -- call syslog repeatedly until it works 2292 ** 2293 ** Needed on HP-UX, which apparently doesn't guarantee that 2294 ** syslog succeeds during interrupt handlers. 2295 */ 2296 2297 #ifdef __hpux 2298 2299 # define MAXSYSLOGTRIES 100 2300 # undef syslog 2301 2302 # ifdef __STDC__ 2303 hard_syslog(int pri, char *msg, ...) 2304 # else 2305 hard_syslog(pri, msg, va_alist) 2306 int pri; 2307 char *msg; 2308 va_dcl 2309 # endif 2310 { 2311 int i; 2312 char buf[SYSLOG_BUFSIZE * 2]; 2313 VA_LOCAL_DECL; 2314 2315 VA_START(msg); 2316 vsprintf(buf, msg, ap); 2317 VA_END; 2318 2319 for (i = MAXSYSLOGTRIES; --i >= 0 && syslog(pri, "%s", buf) < 0; ) 2320 continue; 2321 } 2322 2323 #endif 2324