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 8.40 (Berkeley) 10/08/93"; 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 <pwd.h> 18 19 /* 20 ** CONF.C -- Sendmail Configuration Tables. 21 ** 22 ** Defines the configuration of this installation. 23 ** 24 ** Configuration Variables: 25 ** HdrInfo -- a table describing well-known header fields. 26 ** Each entry has the field name and some flags, 27 ** which are described in sendmail.h. 28 ** 29 ** Notes: 30 ** I have tried to put almost all the reasonable 31 ** configuration information into the configuration 32 ** file read at runtime. My intent is that anything 33 ** here is a function of the version of UNIX you 34 ** are running, or is really static -- for example 35 ** the headers are a superset of widely used 36 ** protocols. If you find yourself playing with 37 ** this file too much, you may be making a mistake! 38 */ 39 40 41 42 43 /* 44 ** Header info table 45 ** Final (null) entry contains the flags used for any other field. 46 ** 47 ** Not all of these are actually handled specially by sendmail 48 ** at this time. They are included as placeholders, to let 49 ** you know that "someday" I intend to have sendmail do 50 ** something with them. 51 */ 52 53 struct hdrinfo HdrInfo[] = 54 { 55 /* originator fields, most to least significant */ 56 "resent-sender", H_FROM|H_RESENT, 57 "resent-from", H_FROM|H_RESENT, 58 "resent-reply-to", H_FROM|H_RESENT, 59 "sender", H_FROM, 60 "from", H_FROM, 61 "reply-to", H_FROM, 62 "full-name", H_ACHECK, 63 "return-receipt-to", H_FROM|H_RECEIPTTO, 64 "errors-to", H_FROM|H_ERRORSTO, 65 66 /* destination fields */ 67 "to", H_RCPT, 68 "resent-to", H_RCPT|H_RESENT, 69 "cc", H_RCPT, 70 "resent-cc", H_RCPT|H_RESENT, 71 "bcc", H_RCPT|H_ACHECK, 72 "resent-bcc", H_RCPT|H_ACHECK|H_RESENT, 73 "apparently-to", H_RCPT, 74 75 /* message identification and control */ 76 "message-id", 0, 77 "resent-message-id", H_RESENT, 78 "message", H_EOH, 79 "text", H_EOH, 80 81 /* date fields */ 82 "date", 0, 83 "resent-date", H_RESENT, 84 85 /* trace fields */ 86 "received", H_TRACE|H_FORCE, 87 "x400-received", H_TRACE|H_FORCE, 88 "via", H_TRACE|H_FORCE, 89 "mail-from", H_TRACE|H_FORCE, 90 91 /* miscellaneous fields */ 92 "comments", H_FORCE, 93 "return-path", H_FORCE|H_ACHECK, 94 95 NULL, 0, 96 }; 97 98 99 100 /* 101 ** Location of system files/databases/etc. 102 */ 103 104 char *PidFile = _PATH_SENDMAILPID; /* stores daemon proc id */ 105 106 107 108 /* 109 ** Privacy values 110 */ 111 112 struct prival PrivacyValues[] = 113 { 114 "public", PRIV_PUBLIC, 115 "needmailhelo", PRIV_NEEDMAILHELO, 116 "needexpnhelo", PRIV_NEEDEXPNHELO, 117 "needvrfyhelo", PRIV_NEEDVRFYHELO, 118 "noexpn", PRIV_NOEXPN, 119 "novrfy", PRIV_NOVRFY, 120 "restrictmailq", PRIV_RESTRICTMAILQ, 121 "restrictqrun", PRIV_RESTRICTQRUN, 122 "authwarnings", PRIV_AUTHWARNINGS, 123 "goaway", PRIV_GOAWAY, 124 NULL, 0, 125 }; 126 127 128 129 /* 130 ** Miscellaneous stuff. 131 */ 132 133 int DtableSize = 50; /* max open files; reset in 4.2bsd */ 134 135 136 /* 137 ** Following should be config parameters (and probably will be in 138 ** future releases). In the meantime, setting these is considered 139 ** unsupported, and is intentionally undocumented. 140 */ 141 142 #ifdef BROKENSMTPPEERS 143 bool BrokenSmtpPeers = TRUE; /* set if you have broken SMTP peers */ 144 #else 145 bool BrokenSmtpPeers = FALSE; /* set if you have broken SMTP peers */ 146 #endif 147 #ifdef NOLOOPBACKCHECK 148 bool CheckLoopBack = FALSE; /* set to check HELO loopback */ 149 #else 150 bool CheckLoopBack = TRUE; /* set to check HELO loopback */ 151 #endif 152 153 /* 154 ** SETDEFAULTS -- set default values 155 ** 156 ** Because of the way freezing is done, these must be initialized 157 ** using direct code. 158 ** 159 ** Parameters: 160 ** e -- the default envelope. 161 ** 162 ** Returns: 163 ** none. 164 ** 165 ** Side Effects: 166 ** Initializes a bunch of global variables to their 167 ** default values. 168 */ 169 170 #define DAYS * 24 * 60 * 60 171 172 setdefaults(e) 173 register ENVELOPE *e; 174 { 175 SpaceSub = ' '; /* option B */ 176 QueueLA = 8; /* option x */ 177 RefuseLA = 12; /* option X */ 178 WkRecipFact = 30000L; /* option y */ 179 WkClassFact = 1800L; /* option z */ 180 WkTimeFact = 90000L; /* option Z */ 181 QueueFactor = WkRecipFact * 20; /* option q */ 182 FileMode = (RealUid != geteuid()) ? 0644 : 0600; 183 /* option F */ 184 DefUid = 1; /* option u */ 185 DefGid = 1; /* option g */ 186 CheckpointInterval = 10; /* option C */ 187 MaxHopCount = 25; /* option h */ 188 e->e_sendmode = SM_FORK; /* option d */ 189 e->e_errormode = EM_PRINT; /* option e */ 190 SevenBit = FALSE; /* option 7 */ 191 MaxMciCache = 1; /* option k */ 192 MciCacheTimeout = 300; /* option K */ 193 LogLevel = 9; /* option L */ 194 settimeouts(NULL); /* option r */ 195 TimeOuts.to_q_return = 5 DAYS; /* option T */ 196 TimeOuts.to_q_warning = 0; /* option T */ 197 PrivacyFlags = 0; /* option p */ 198 setdefuser(); 199 setupmaps(); 200 setupmailers(); 201 } 202 203 204 /* 205 ** SETDEFUSER -- set/reset DefUser using DefUid (for initgroups()) 206 */ 207 208 setdefuser() 209 { 210 struct passwd *defpwent; 211 static char defuserbuf[40]; 212 213 DefUser = defuserbuf; 214 if ((defpwent = getpwuid(DefUid)) != NULL) 215 strcpy(defuserbuf, defpwent->pw_name); 216 else 217 strcpy(defuserbuf, "nobody"); 218 } 219 /* 220 ** HOST_MAP_INIT -- initialize host class structures 221 */ 222 223 bool 224 host_map_init(map, args) 225 MAP *map; 226 char *args; 227 { 228 register char *p = args; 229 230 for (;;) 231 { 232 while (isascii(*p) && isspace(*p)) 233 p++; 234 if (*p != '-') 235 break; 236 switch (*++p) 237 { 238 case 'a': 239 map->map_app = ++p; 240 break; 241 } 242 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 243 p++; 244 if (*p != '\0') 245 *p++ = '\0'; 246 } 247 if (map->map_app != NULL) 248 map->map_app = newstr(map->map_app); 249 return TRUE; 250 } 251 /* 252 ** SETUPMAILERS -- initialize default mailers 253 */ 254 255 setupmailers() 256 { 257 char buf[100]; 258 259 strcpy(buf, "prog, P=/bin/sh, F=lsD, A=sh -c $u"); 260 makemailer(buf); 261 262 strcpy(buf, "*file*, P=/dev/null, F=lsDFMPEu, A=FILE"); 263 makemailer(buf); 264 265 strcpy(buf, "*include*, P=/dev/null, F=su, A=INCLUDE"); 266 makemailer(buf); 267 } 268 /* 269 ** SETUPMAPS -- set up map classes 270 */ 271 272 #define MAPDEF(name, ext, flags, parse, open, close, lookup, store) \ 273 { \ 274 extern bool parse __P((MAP *, char *)); \ 275 extern bool open __P((MAP *, int)); \ 276 extern void close __P((MAP *)); \ 277 extern char *lookup __P((MAP *, char *, char **, int *)); \ 278 extern void store __P((MAP *, char *, char *)); \ 279 s = stab(name, ST_MAPCLASS, ST_ENTER); \ 280 s->s_mapclass.map_cname = name; \ 281 s->s_mapclass.map_ext = ext; \ 282 s->s_mapclass.map_cflags = flags; \ 283 s->s_mapclass.map_parse = parse; \ 284 s->s_mapclass.map_open = open; \ 285 s->s_mapclass.map_close = close; \ 286 s->s_mapclass.map_lookup = lookup; \ 287 s->s_mapclass.map_store = store; \ 288 } 289 290 setupmaps() 291 { 292 register STAB *s; 293 294 #ifdef NEWDB 295 MAPDEF("hash", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 296 map_parseargs, hash_map_open, db_map_close, 297 db_map_lookup, db_map_store); 298 MAPDEF("btree", ".db", MCF_ALIASOK|MCF_REBUILDABLE, 299 map_parseargs, bt_map_open, db_map_close, 300 db_map_lookup, db_map_store); 301 #endif 302 303 #ifdef NDBM 304 MAPDEF("dbm", ".dir", MCF_ALIASOK|MCF_REBUILDABLE, 305 map_parseargs, ndbm_map_open, ndbm_map_close, 306 ndbm_map_lookup, ndbm_map_store); 307 #endif 308 309 #ifdef NIS 310 MAPDEF("nis", NULL, MCF_ALIASOK, 311 map_parseargs, nis_map_open, nis_map_close, 312 nis_map_lookup, nis_map_store); 313 #endif 314 315 MAPDEF("stab", NULL, MCF_ALIASOK|MCF_ALIASONLY, 316 map_parseargs, stab_map_open, stab_map_close, 317 stab_map_lookup, stab_map_store); 318 319 MAPDEF("implicit", NULL, MCF_ALIASOK|MCF_ALIASONLY|MCF_REBUILDABLE, 320 map_parseargs, impl_map_open, impl_map_close, 321 impl_map_lookup, impl_map_store); 322 323 /* host DNS lookup */ 324 MAPDEF("host", NULL, 0, 325 host_map_init, null_map_open, null_map_close, 326 host_map_lookup, null_map_store); 327 328 /* dequote map */ 329 MAPDEF("dequote", NULL, 0, 330 dequote_init, null_map_open, null_map_close, 331 dequote_map, null_map_store); 332 333 #if 0 334 # ifdef USERDB 335 /* user database */ 336 MAPDEF("udb", ".db", 0, 337 udb_map_parse, null_map_open, null_map_close, 338 udb_map_lookup, null_map_store); 339 # endif 340 #endif 341 } 342 343 #undef MAPDEF 344 /* 345 ** USERNAME -- return the user id of the logged in user. 346 ** 347 ** Parameters: 348 ** none. 349 ** 350 ** Returns: 351 ** The login name of the logged in user. 352 ** 353 ** Side Effects: 354 ** none. 355 ** 356 ** Notes: 357 ** The return value is statically allocated. 358 */ 359 360 char * 361 username() 362 { 363 static char *myname = NULL; 364 extern char *getlogin(); 365 register struct passwd *pw; 366 367 /* cache the result */ 368 if (myname == NULL) 369 { 370 myname = getlogin(); 371 if (myname == NULL || myname[0] == '\0') 372 { 373 pw = getpwuid(RealUid); 374 if (pw != NULL) 375 myname = newstr(pw->pw_name); 376 } 377 else 378 { 379 uid_t uid = RealUid; 380 381 myname = newstr(myname); 382 if ((pw = getpwnam(myname)) == NULL || 383 (uid != 0 && uid != pw->pw_uid)) 384 { 385 pw = getpwuid(uid); 386 if (pw != NULL) 387 myname = newstr(pw->pw_name); 388 } 389 } 390 if (myname == NULL || myname[0] == '\0') 391 { 392 syserr("554 Who are you?"); 393 myname = "postmaster"; 394 } 395 } 396 397 return (myname); 398 } 399 /* 400 ** TTYPATH -- Get the path of the user's tty 401 ** 402 ** Returns the pathname of the user's tty. Returns NULL if 403 ** the user is not logged in or if s/he has write permission 404 ** denied. 405 ** 406 ** Parameters: 407 ** none 408 ** 409 ** Returns: 410 ** pathname of the user's tty. 411 ** NULL if not logged in or write permission denied. 412 ** 413 ** Side Effects: 414 ** none. 415 ** 416 ** WARNING: 417 ** Return value is in a local buffer. 418 ** 419 ** Called By: 420 ** savemail 421 */ 422 423 char * 424 ttypath() 425 { 426 struct stat stbuf; 427 register char *pathn; 428 extern char *ttyname(); 429 extern char *getlogin(); 430 431 /* compute the pathname of the controlling tty */ 432 if ((pathn = ttyname(2)) == NULL && (pathn = ttyname(1)) == NULL && 433 (pathn = ttyname(0)) == NULL) 434 { 435 errno = 0; 436 return (NULL); 437 } 438 439 /* see if we have write permission */ 440 if (stat(pathn, &stbuf) < 0 || !bitset(02, stbuf.st_mode)) 441 { 442 errno = 0; 443 return (NULL); 444 } 445 446 /* see if the user is logged in */ 447 if (getlogin() == NULL) 448 return (NULL); 449 450 /* looks good */ 451 return (pathn); 452 } 453 /* 454 ** CHECKCOMPAT -- check for From and To person compatible. 455 ** 456 ** This routine can be supplied on a per-installation basis 457 ** to determine whether a person is allowed to send a message. 458 ** This allows restriction of certain types of internet 459 ** forwarding or registration of users. 460 ** 461 ** If the hosts are found to be incompatible, an error 462 ** message should be given using "usrerr" and 0 should 463 ** be returned. 464 ** 465 ** 'NoReturn' can be set to suppress the return-to-sender 466 ** function; this should be done on huge messages. 467 ** 468 ** Parameters: 469 ** to -- the person being sent to. 470 ** 471 ** Returns: 472 ** an exit status 473 ** 474 ** Side Effects: 475 ** none (unless you include the usrerr stuff) 476 */ 477 478 checkcompat(to, e) 479 register ADDRESS *to; 480 register ENVELOPE *e; 481 { 482 # ifdef lint 483 if (to == NULL) 484 to++; 485 # endif /* lint */ 486 487 if (tTd(49, 1)) 488 printf("checkcompat(to=%s, from=%s)\n", 489 to->q_paddr, e->e_from.q_paddr); 490 491 # ifdef EXAMPLE_CODE 492 /* this code is intended as an example only */ 493 register STAB *s; 494 495 s = stab("arpa", ST_MAILER, ST_FIND); 496 if (s != NULL && e->e_from.q_mailer != LocalMailer && 497 to->q_mailer == s->s_mailer) 498 { 499 usrerr("553 No ARPA mail through this machine: see your system administration"); 500 /* NoReturn = TRUE; to supress return copy */ 501 return (EX_UNAVAILABLE); 502 } 503 # endif /* EXAMPLE_CODE */ 504 return (EX_OK); 505 } 506 /* 507 ** SETSIGNAL -- set a signal handler 508 ** 509 ** This is essentially old BSD "signal(3)". 510 */ 511 512 sigfunc_t 513 setsignal(sig, handler) 514 int sig; 515 sigfunc_t handler; 516 { 517 #if defined(SYS5SIGNALS) || defined(BSD4_3) || defined(_AUX_SOURCE) 518 return signal(sig, handler); 519 #else 520 struct sigaction n, o; 521 522 bzero(&n, sizeof n); 523 n.sa_handler = handler; 524 if (sigaction(sig, &n, &o) < 0) 525 return SIG_ERR; 526 return o.sa_handler; 527 #endif 528 } 529 /* 530 ** HOLDSIGS -- arrange to hold all signals 531 ** 532 ** Parameters: 533 ** none. 534 ** 535 ** Returns: 536 ** none. 537 ** 538 ** Side Effects: 539 ** Arranges that signals are held. 540 */ 541 542 holdsigs() 543 { 544 } 545 /* 546 ** RLSESIGS -- arrange to release all signals 547 ** 548 ** This undoes the effect of holdsigs. 549 ** 550 ** Parameters: 551 ** none. 552 ** 553 ** Returns: 554 ** none. 555 ** 556 ** Side Effects: 557 ** Arranges that signals are released. 558 */ 559 560 rlsesigs() 561 { 562 } 563 /* 564 ** INIT_MD -- do machine dependent initializations 565 ** 566 ** Systems that have global modes that should be set should do 567 ** them here rather than in main. 568 */ 569 570 #ifdef _AUX_SOURCE 571 # include <compat.h> 572 #endif 573 574 init_md() 575 { 576 #ifdef _AUX_SOURCE 577 setcompat(getcompat() | COMPAT_BSDPROT); 578 #endif 579 } 580 /* 581 ** GETLA -- get the current load average 582 ** 583 ** This code stolen from la.c. 584 ** 585 ** Parameters: 586 ** none. 587 ** 588 ** Returns: 589 ** The current load average as an integer. 590 ** 591 ** Side Effects: 592 ** none. 593 */ 594 595 /* try to guess what style of load average we have */ 596 #define LA_ZERO 1 /* always return load average as zero */ 597 #define LA_INT 2 /* read kmem for avenrun; interpret as long */ 598 #define LA_FLOAT 3 /* read kmem for avenrun; interpret as float */ 599 #define LA_SUBR 4 /* call getloadavg */ 600 #define LA_MACH 5 /* MACH load averages (as on NeXT boxes) */ 601 #define LA_SHORT 6 /* read kmem for avenrun; interpret as short */ 602 603 /* do guesses based on general OS type */ 604 #ifndef LA_TYPE 605 # define LA_TYPE LA_ZERO 606 #endif 607 608 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 609 610 #include <nlist.h> 611 612 #ifndef LA_AVENRUN 613 # ifdef SYSTEM5 614 # define LA_AVENRUN "avenrun" 615 # else 616 # define LA_AVENRUN "_avenrun" 617 # endif 618 #endif 619 620 /* _PATH_UNIX should be defined in <paths.h> */ 621 #ifndef _PATH_UNIX 622 # if defined(SYSTEM5) 623 # define _PATH_UNIX "/unix" 624 # else 625 # define _PATH_UNIX "/vmunix" 626 # endif 627 #endif 628 629 struct nlist Nl[] = 630 { 631 { LA_AVENRUN }, 632 #define X_AVENRUN 0 633 { 0 }, 634 }; 635 636 #ifndef FSHIFT 637 # if defined(unixpc) 638 # define FSHIFT 5 639 # endif 640 641 # if defined(__alpha) 642 # define FSHIFT 10 643 # endif 644 645 # if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 646 # define FSHIFT 8 647 # endif 648 #endif 649 650 #if ((LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT)) && !defined(FSCALE) 651 # define FSCALE (1 << FSHIFT) 652 #endif 653 654 getla() 655 { 656 static int kmem = -1; 657 #if LA_TYPE == LA_INT 658 long avenrun[3]; 659 #else 660 # if LA_TYPE == LA_SHORT 661 short avenrun[3]; 662 # else 663 double avenrun[3]; 664 # endif 665 #endif 666 extern off_t lseek(); 667 extern int errno; 668 669 if (kmem < 0) 670 { 671 kmem = open("/dev/kmem", 0, 0); 672 if (kmem < 0) 673 { 674 if (tTd(3, 1)) 675 printf("getla: open(/dev/kmem): %s\n", 676 errstring(errno)); 677 return (-1); 678 } 679 (void) fcntl(kmem, F_SETFD, 1); 680 if (nlist(_PATH_UNIX, Nl) < 0) 681 { 682 if (tTd(3, 1)) 683 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 684 errstring(errno)); 685 return (-1); 686 } 687 if (Nl[X_AVENRUN].n_value == 0) 688 { 689 if (tTd(3, 1)) 690 printf("getla: nlist(%s, %s) ==> 0\n", 691 _PATH_UNIX, LA_AVENRUN); 692 return (-1); 693 } 694 } 695 if (tTd(3, 20)) 696 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 697 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, 0) == -1 || 698 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 699 { 700 /* thank you Ian */ 701 if (tTd(3, 1)) 702 printf("getla: lseek or read: %s\n", errstring(errno)); 703 return (-1); 704 } 705 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 706 if (tTd(3, 5)) 707 { 708 printf("getla: avenrun = %d", avenrun[0]); 709 if (tTd(3, 15)) 710 printf(", %d, %d", avenrun[1], avenrun[2]); 711 printf("\n"); 712 } 713 if (tTd(3, 1)) 714 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 715 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 716 #else 717 if (tTd(3, 5)) 718 { 719 printf("getla: avenrun = %g", avenrun[0]); 720 if (tTd(3, 15)) 721 printf(", %g, %g", avenrun[1], avenrun[2]); 722 printf("\n"); 723 } 724 if (tTd(3, 1)) 725 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 726 return ((int) (avenrun[0] + 0.5)); 727 #endif 728 } 729 730 #else 731 #if LA_TYPE == LA_SUBR 732 733 getla() 734 { 735 double avenrun[3]; 736 737 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 738 { 739 if (tTd(3, 1)) 740 perror("getla: getloadavg failed:"); 741 return (-1); 742 } 743 if (tTd(3, 1)) 744 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 745 return ((int) (avenrun[0] + 0.5)); 746 } 747 748 #else 749 #if LA_TYPE == LA_MACH 750 751 /* 752 ** This has been tested on NeXT release 2.1. 753 */ 754 755 #include <mach.h> 756 757 getla() 758 { 759 processor_set_t default_set; 760 kern_return_t error; 761 unsigned int info_count; 762 struct processor_set_basic_info info; 763 host_t host; 764 765 error = processor_set_default(host_self(), &default_set); 766 if (error != KERN_SUCCESS) 767 return -1; 768 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 769 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 770 &host, (processor_set_info_t)&info, 771 &info_count) != KERN_SUCCESS) 772 { 773 return -1; 774 } 775 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 776 } 777 778 779 #else 780 781 getla() 782 { 783 if (tTd(3, 1)) 784 printf("getla: ZERO\n"); 785 return (0); 786 } 787 788 #endif 789 #endif 790 #endif 791 /* 792 ** SHOULDQUEUE -- should this message be queued or sent? 793 ** 794 ** Compares the message cost to the load average to decide. 795 ** 796 ** Parameters: 797 ** pri -- the priority of the message in question. 798 ** ctime -- the message creation time. 799 ** 800 ** Returns: 801 ** TRUE -- if this message should be queued up for the 802 ** time being. 803 ** FALSE -- if the load is low enough to send this message. 804 ** 805 ** Side Effects: 806 ** none. 807 */ 808 809 bool 810 shouldqueue(pri, ctime) 811 long pri; 812 time_t ctime; 813 { 814 if (CurrentLA < QueueLA) 815 return (FALSE); 816 if (CurrentLA >= RefuseLA) 817 return (TRUE); 818 return (pri > (QueueFactor / (CurrentLA - QueueLA + 1))); 819 } 820 /* 821 ** REFUSECONNECTIONS -- decide if connections should be refused 822 ** 823 ** Parameters: 824 ** none. 825 ** 826 ** Returns: 827 ** TRUE if incoming SMTP connections should be refused 828 ** (for now). 829 ** FALSE if we should accept new work. 830 ** 831 ** Side Effects: 832 ** none. 833 */ 834 835 bool 836 refuseconnections() 837 { 838 #ifdef XLA 839 if (!xla_smtp_ok()) 840 return TRUE; 841 #endif 842 843 /* this is probably too simplistic */ 844 return (CurrentLA >= RefuseLA); 845 } 846 /* 847 ** SETPROCTITLE -- set process title for ps 848 ** 849 ** Parameters: 850 ** fmt -- a printf style format string. 851 ** a, b, c -- possible parameters to fmt. 852 ** 853 ** Returns: 854 ** none. 855 ** 856 ** Side Effects: 857 ** Clobbers argv of our main procedure so ps(1) will 858 ** display the title. 859 */ 860 861 #ifdef SETPROCTITLE 862 # ifdef __hpux 863 # include <sys/pstat.h> 864 # endif 865 # ifdef BSD4_4 866 # include <machine/vmparam.h> 867 # include <sys/exec.h> 868 # ifdef __bsdi__ 869 # undef PS_STRINGS /* BSDI 1.0 doesn't do PS_STRINGS as we expect */ 870 # endif 871 # ifdef PS_STRINGS 872 # define SETPROC_STATIC static 873 # endif 874 # endif 875 # ifndef SETPROC_STATIC 876 # define SETPROC_STATIC 877 # endif 878 #endif 879 880 /*VARARGS1*/ 881 #ifdef __STDC__ 882 setproctitle(char *fmt, ...) 883 #else 884 setproctitle(fmt, va_alist) 885 char *fmt; 886 va_dcl 887 #endif 888 { 889 # ifdef SETPROCTITLE 890 register char *p; 891 register int i; 892 SETPROC_STATIC char buf[MAXLINE]; 893 VA_LOCAL_DECL 894 # ifdef __hpux 895 union pstun pst; 896 # endif 897 extern char **Argv; 898 extern char *LastArgv; 899 900 p = buf; 901 902 /* print sendmail: heading for grep */ 903 (void) strcpy(p, "sendmail: "); 904 p += strlen(p); 905 906 /* print the argument string */ 907 VA_START(fmt); 908 (void) vsprintf(p, fmt, ap); 909 VA_END; 910 911 i = strlen(buf); 912 913 # ifdef __hpux 914 pst.pst_command = buf; 915 pstat(PSTAT_SETCMD, pst, i, 0, 0); 916 # else 917 # ifdef PS_STRINGS 918 PS_STRINGS->ps_nargvstr = 1; 919 PS_STRINGS->ps_argvstr = buf; 920 # else 921 if (i > LastArgv - Argv[0] - 2) 922 { 923 i = LastArgv - Argv[0] - 2; 924 buf[i] = '\0'; 925 } 926 (void) strcpy(Argv[0], buf); 927 p = &Argv[0][i]; 928 while (p < LastArgv) 929 *p++ = ' '; 930 # endif 931 # endif 932 # endif /* SETPROCTITLE */ 933 } 934 /* 935 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 936 ** 937 ** Parameters: 938 ** none. 939 ** 940 ** Returns: 941 ** none. 942 ** 943 ** Side Effects: 944 ** Picks up extant zombies. 945 */ 946 947 void 948 reapchild() 949 { 950 # ifdef HASWAITPID 951 auto int status; 952 int count; 953 int pid; 954 955 count = 0; 956 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 957 { 958 if (count++ > 1000) 959 { 960 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 961 pid, status); 962 break; 963 } 964 } 965 # else 966 # ifdef WNOHANG 967 union wait status; 968 969 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 970 continue; 971 # else /* WNOHANG */ 972 auto int status; 973 974 while (wait(&status) > 0) 975 continue; 976 # endif /* WNOHANG */ 977 # endif 978 # ifdef SYS5SIGNALS 979 (void) setsignal(SIGCHLD, reapchild); 980 # endif 981 } 982 /* 983 ** UNSETENV -- remove a variable from the environment 984 ** 985 ** Not needed on newer systems. 986 ** 987 ** Parameters: 988 ** name -- the string name of the environment variable to be 989 ** deleted from the current environment. 990 ** 991 ** Returns: 992 ** none. 993 ** 994 ** Globals: 995 ** environ -- a pointer to the current environment. 996 ** 997 ** Side Effects: 998 ** Modifies environ. 999 */ 1000 1001 #ifndef HASUNSETENV 1002 1003 void 1004 unsetenv(name) 1005 char *name; 1006 { 1007 extern char **environ; 1008 register char **pp; 1009 int len = strlen(name); 1010 1011 for (pp = environ; *pp != NULL; pp++) 1012 { 1013 if (strncmp(name, *pp, len) == 0 && 1014 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 1015 break; 1016 } 1017 1018 for (; *pp != NULL; pp++) 1019 *pp = pp[1]; 1020 } 1021 1022 #endif 1023 /* 1024 ** GETDTABLESIZE -- return number of file descriptors 1025 ** 1026 ** Only on non-BSD systems 1027 ** 1028 ** Parameters: 1029 ** none 1030 ** 1031 ** Returns: 1032 ** size of file descriptor table 1033 ** 1034 ** Side Effects: 1035 ** none 1036 */ 1037 1038 #ifdef SOLARIS 1039 # include <sys/resource.h> 1040 #endif 1041 1042 int 1043 getdtsize() 1044 { 1045 #ifdef RLIMIT_NOFILE 1046 struct rlimit rl; 1047 1048 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1049 return rl.rlim_cur; 1050 #endif 1051 1052 # ifdef HASGETDTABLESIZE 1053 return getdtablesize(); 1054 # else 1055 # ifdef _SC_OPEN_MAX 1056 return sysconf(_SC_OPEN_MAX); 1057 # else 1058 return NOFILE; 1059 # endif 1060 # endif 1061 } 1062 /* 1063 ** UNAME -- get the UUCP name of this system. 1064 */ 1065 1066 #ifndef HASUNAME 1067 1068 int 1069 uname(name) 1070 struct utsname *name; 1071 { 1072 FILE *file; 1073 char *n; 1074 1075 name->nodename[0] = '\0'; 1076 1077 /* try /etc/whoami -- one line with the node name */ 1078 if ((file = fopen("/etc/whoami", "r")) != NULL) 1079 { 1080 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1081 (void) fclose(file); 1082 n = strchr(name->nodename, '\n'); 1083 if (n != NULL) 1084 *n = '\0'; 1085 if (name->nodename[0] != '\0') 1086 return (0); 1087 } 1088 1089 /* try /usr/include/whoami.h -- has a #define somewhere */ 1090 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1091 { 1092 char buf[MAXLINE]; 1093 1094 while (fgets(buf, MAXLINE, file) != NULL) 1095 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1096 NODE_LENGTH, name->nodename) > 0) 1097 break; 1098 (void) fclose(file); 1099 if (name->nodename[0] != '\0') 1100 return (0); 1101 } 1102 1103 #ifdef TRUST_POPEN 1104 /* 1105 ** Popen is known to have security holes. 1106 */ 1107 1108 /* try uuname -l to return local name */ 1109 if ((file = popen("uuname -l", "r")) != NULL) 1110 { 1111 (void) fgets(name, NODE_LENGTH + 1, file); 1112 (void) pclose(file); 1113 n = strchr(name, '\n'); 1114 if (n != NULL) 1115 *n = '\0'; 1116 if (name->nodename[0] != '\0') 1117 return (0); 1118 } 1119 #endif 1120 1121 return (-1); 1122 } 1123 #endif /* HASUNAME */ 1124 /* 1125 ** INITGROUPS -- initialize groups 1126 ** 1127 ** Stub implementation for System V style systems 1128 */ 1129 1130 #ifndef HASINITGROUPS 1131 1132 initgroups(name, basegid) 1133 char *name; 1134 int basegid; 1135 { 1136 return 0; 1137 } 1138 1139 #endif 1140 /* 1141 ** SETSID -- set session id (for non-POSIX systems) 1142 */ 1143 1144 #ifndef HASSETSID 1145 1146 pid_t 1147 setsid __P ((void)) 1148 { 1149 #ifdef TIOCNOTTY 1150 int fd; 1151 1152 fd = open("/dev/tty", 2); 1153 if (fd >= 0) 1154 { 1155 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1156 (void) close(fd); 1157 } 1158 #endif /* TIOCNOTTY */ 1159 # ifdef SYS5SETPGRP 1160 return setpgrp(); 1161 # else 1162 return setpgid(0, getpid()); 1163 # endif 1164 } 1165 1166 #endif 1167 /* 1168 ** GETOPT -- for old systems or systems with bogus implementations 1169 */ 1170 1171 #ifdef NEEDGETOPT 1172 1173 /* 1174 * Copyright (c) 1985 Regents of the University of California. 1175 * All rights reserved. The Berkeley software License Agreement 1176 * specifies the terms and conditions for redistribution. 1177 */ 1178 1179 1180 /* 1181 ** this version hacked to add `atend' flag to allow state machine 1182 ** to reset if invoked by the program to scan args for a 2nd time 1183 */ 1184 1185 #if defined(LIBC_SCCS) && !defined(lint) 1186 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1187 #endif /* LIBC_SCCS and not lint */ 1188 1189 #include <stdio.h> 1190 1191 /* 1192 * get option letter from argument vector 1193 */ 1194 int opterr = 1, /* if error message should be printed */ 1195 optind = 1, /* index into parent argv vector */ 1196 optopt; /* character checked for validity */ 1197 char *optarg; /* argument associated with option */ 1198 1199 #define BADCH (int)'?' 1200 #define EMSG "" 1201 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1202 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1203 1204 getopt(nargc,nargv,ostr) 1205 int nargc; 1206 char **nargv, 1207 *ostr; 1208 { 1209 static char *place = EMSG; /* option letter processing */ 1210 static char atend = 0; 1211 register char *oli; /* option letter list index */ 1212 1213 if (atend) { 1214 atend = 0; 1215 place = EMSG; 1216 } 1217 if(!*place) { /* update scanning pointer */ 1218 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1219 atend++; 1220 return(EOF); 1221 } 1222 if (*place == '-') { /* found "--" */ 1223 ++optind; 1224 atend++; 1225 return(EOF); 1226 } 1227 } /* option letter okay? */ 1228 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1229 if (!*place) ++optind; 1230 tell(": illegal option -- "); 1231 } 1232 if (*++oli != ':') { /* don't need argument */ 1233 optarg = NULL; 1234 if (!*place) ++optind; 1235 } 1236 else { /* need an argument */ 1237 if (*place) optarg = place; /* no white space */ 1238 else if (nargc <= ++optind) { /* no arg */ 1239 place = EMSG; 1240 tell(": option requires an argument -- "); 1241 } 1242 else optarg = nargv[optind]; /* white space */ 1243 place = EMSG; 1244 ++optind; 1245 } 1246 return(optopt); /* dump back option letter */ 1247 } 1248 1249 #endif 1250 /* 1251 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1252 */ 1253 1254 #ifdef NEEDVPRINTF 1255 1256 #define MAXARG 16 1257 1258 vfprintf(fp, fmt, ap) 1259 FILE * fp; 1260 char * fmt; 1261 char ** ap; 1262 { 1263 char * bp[MAXARG]; 1264 int i = 0; 1265 1266 while (*ap && i < MAXARG) 1267 bp[i++] = *ap++; 1268 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1269 bp[4], bp[5], bp[6], bp[7], 1270 bp[8], bp[9], bp[10], bp[11], 1271 bp[12], bp[13], bp[14], bp[15]); 1272 } 1273 1274 vsprintf(s, fmt, ap) 1275 char * s; 1276 char * fmt; 1277 char ** ap; 1278 { 1279 char * bp[MAXARG]; 1280 int i = 0; 1281 1282 while (*ap && i < MAXARG) 1283 bp[i++] = *ap++; 1284 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1285 bp[4], bp[5], bp[6], bp[7], 1286 bp[8], bp[9], bp[10], bp[11], 1287 bp[12], bp[13], bp[14], bp[15]); 1288 } 1289 1290 #endif 1291 /* 1292 ** FREESPACE -- see how much free space is on the queue filesystem 1293 ** 1294 ** Only implemented if you have statfs. 1295 ** 1296 ** Parameters: 1297 ** dir -- the directory in question. 1298 ** bsize -- a variable into which the filesystem 1299 ** block size is stored. 1300 ** 1301 ** Returns: 1302 ** The number of bytes free on the queue filesystem. 1303 ** -1 if the statfs call fails. 1304 ** 1305 ** Side effects: 1306 ** Puts the filesystem block size into bsize. 1307 */ 1308 1309 #ifdef HASSTATFS 1310 # undef HASUSTAT 1311 #endif 1312 1313 #if defined(HASUSTAT) 1314 # include <ustat.h> 1315 #endif 1316 1317 #ifdef HASSTATFS 1318 # if defined(IRIX) || defined(apollo) || defined(_SCO_unix_) || defined(UMAXV) 1319 # include <sys/statfs.h> 1320 # else 1321 # if (defined(sun) && !defined(BSD)) || defined(__hpux) || defined(_CONVEX_SOURCE) || defined(NeXT) || defined(_AUX_SOURCE) 1322 # include <sys/vfs.h> 1323 # else 1324 # include <sys/mount.h> 1325 # endif 1326 # endif 1327 #endif 1328 1329 long 1330 freespace(dir, bsize) 1331 char *dir; 1332 long *bsize; 1333 { 1334 #if defined(HASSTATFS) || defined(HASUSTAT) 1335 # if defined(HASUSTAT) 1336 struct ustat fs; 1337 struct stat statbuf; 1338 # define FSBLOCKSIZE DEV_BSIZE 1339 # define f_bavail f_tfree 1340 # else 1341 # if defined(ultrix) 1342 struct fs_data fs; 1343 # define f_bavail fd_bfreen 1344 # define FSBLOCKSIZE fs.fd_bsize 1345 # else 1346 struct statfs fs; 1347 # define FSBLOCKSIZE fs.f_bsize 1348 # if defined(_SCO_unix_) || defined(IRIX) 1349 # define f_bavail f_bfree 1350 # endif 1351 # endif 1352 # endif 1353 extern int errno; 1354 1355 # if defined(HASUSTAT) 1356 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 1357 # else 1358 # if defined(IRIX) || defined(apollo) || defined(UMAXV) 1359 if (statfs(dir, &fs, sizeof fs, 0) == 0) 1360 # else 1361 # if defined(ultrix) 1362 if (statfs(dir, &fs) > 0) 1363 # else 1364 if (statfs(dir, &fs) == 0) 1365 # endif 1366 # endif 1367 # endif 1368 { 1369 if (bsize != NULL) 1370 *bsize = FSBLOCKSIZE; 1371 return (fs.f_bavail); 1372 } 1373 #endif 1374 return (-1); 1375 } 1376 /* 1377 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 1378 ** 1379 ** Only implemented if you have statfs. 1380 ** 1381 ** Parameters: 1382 ** msize -- the size to check against. If zero, we don't yet 1383 ** know how big the message will be, so just check for 1384 ** a "reasonable" amount. 1385 ** 1386 ** Returns: 1387 ** TRUE if there is enough space. 1388 ** FALSE otherwise. 1389 */ 1390 1391 bool 1392 enoughspace(msize) 1393 long msize; 1394 { 1395 long bfree, bsize; 1396 1397 if (MinBlocksFree <= 0 && msize <= 0) 1398 { 1399 if (tTd(4, 80)) 1400 printf("enoughspace: no threshold\n"); 1401 return TRUE; 1402 } 1403 1404 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 1405 { 1406 if (tTd(4, 80)) 1407 printf("enoughspace: bavail=%ld, need=%ld\n", 1408 bfree, msize); 1409 1410 /* convert msize to block count */ 1411 msize = msize / bsize + 1; 1412 if (MinBlocksFree >= 0) 1413 msize += MinBlocksFree; 1414 1415 if (bfree < msize) 1416 { 1417 #ifdef LOG 1418 if (LogLevel > 0) 1419 syslog(LOG_ALERT, 1420 "%s: low on space (have %ld, %s needs %ld in %s)", 1421 CurEnv->e_id, bfree, 1422 CurHostName, msize, QueueDir); 1423 #endif 1424 return FALSE; 1425 } 1426 } 1427 else if (tTd(4, 80)) 1428 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 1429 MinBlocksFree, msize, errstring(errno)); 1430 return TRUE; 1431 } 1432 /* 1433 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 1434 ** 1435 ** This looks at an errno value and tells if this is likely to 1436 ** go away if retried later. 1437 ** 1438 ** Parameters: 1439 ** err -- the errno code to classify. 1440 ** 1441 ** Returns: 1442 ** TRUE if this is probably transient. 1443 ** FALSE otherwise. 1444 */ 1445 1446 bool 1447 transienterror(err) 1448 int err; 1449 { 1450 switch (err) 1451 { 1452 case EIO: /* I/O error */ 1453 case ENXIO: /* Device not configured */ 1454 case EAGAIN: /* Resource temporarily unavailable */ 1455 case ENOMEM: /* Cannot allocate memory */ 1456 case ENODEV: /* Operation not supported by device */ 1457 case ENFILE: /* Too many open files in system */ 1458 case EMFILE: /* Too many open files */ 1459 case ENOSPC: /* No space left on device */ 1460 #ifdef ETIMEDOUT 1461 case ETIMEDOUT: /* Connection timed out */ 1462 #endif 1463 #ifdef ESTALE 1464 case ESTALE: /* Stale NFS file handle */ 1465 #endif 1466 #ifdef ENETDOWN 1467 case ENETDOWN: /* Network is down */ 1468 #endif 1469 #ifdef ENETUNREACH 1470 case ENETUNREACH: /* Network is unreachable */ 1471 #endif 1472 #ifdef ENETRESET 1473 case ENETRESET: /* Network dropped connection on reset */ 1474 #endif 1475 #ifdef ECONNABORTED 1476 case ECONNABORTED: /* Software caused connection abort */ 1477 #endif 1478 #ifdef ECONNRESET 1479 case ECONNRESET: /* Connection reset by peer */ 1480 #endif 1481 #ifdef ENOBUFS 1482 case ENOBUFS: /* No buffer space available */ 1483 #endif 1484 #ifdef ESHUTDOWN 1485 case ESHUTDOWN: /* Can't send after socket shutdown */ 1486 #endif 1487 #ifdef ECONNREFUSED 1488 case ECONNREFUSED: /* Connection refused */ 1489 #endif 1490 #ifdef EHOSTDOWN 1491 case EHOSTDOWN: /* Host is down */ 1492 #endif 1493 #ifdef EHOSTUNREACH 1494 case EHOSTUNREACH: /* No route to host */ 1495 #endif 1496 #ifdef EDQUOT 1497 case EDQUOT: /* Disc quota exceeded */ 1498 #endif 1499 #ifdef EPROCLIM 1500 case EPROCLIM: /* Too many processes */ 1501 #endif 1502 #ifdef EUSERS 1503 case EUSERS: /* Too many users */ 1504 #endif 1505 #ifdef EDEADLK 1506 case EDEADLK: /* Resource deadlock avoided */ 1507 #endif 1508 #ifdef EISCONN 1509 case EISCONN: /* Socket already connected */ 1510 #endif 1511 #ifdef EINPROGRESS 1512 case EINPROGRESS: /* Operation now in progress */ 1513 #endif 1514 #ifdef EALREADY 1515 case EALREADY: /* Operation already in progress */ 1516 #endif 1517 #ifdef EADDRINUSE 1518 case EADDRINUSE: /* Address already in use */ 1519 #endif 1520 #ifdef EADDRNOTAVAIL 1521 case EADDRNOTAVAIL: /* Can't assign requested address */ 1522 #endif 1523 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 1524 case ENOSR: /* Out of streams resources */ 1525 #endif 1526 return TRUE; 1527 } 1528 1529 /* nope, must be permanent */ 1530 return FALSE; 1531 } 1532 /* 1533 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 1534 ** 1535 ** Parameters: 1536 ** fd -- the file descriptor of the file. 1537 ** filename -- the file name (for error messages). 1538 ** ext -- the filename extension. 1539 ** type -- type of the lock. Bits can be: 1540 ** LOCK_EX -- exclusive lock. 1541 ** LOCK_NB -- non-blocking. 1542 ** 1543 ** Returns: 1544 ** TRUE if the lock was acquired. 1545 ** FALSE otherwise. 1546 */ 1547 1548 bool 1549 lockfile(fd, filename, ext, type) 1550 int fd; 1551 char *filename; 1552 char *ext; 1553 int type; 1554 { 1555 # ifndef HASFLOCK 1556 int action; 1557 struct flock lfd; 1558 1559 if (ext == NULL) 1560 ext = ""; 1561 1562 bzero(&lfd, sizeof lfd); 1563 if (bitset(LOCK_UN, type)) 1564 lfd.l_type = F_UNLCK; 1565 else if (bitset(LOCK_EX, type)) 1566 lfd.l_type = F_WRLCK; 1567 else 1568 lfd.l_type = F_RDLCK; 1569 1570 if (bitset(LOCK_NB, type)) 1571 action = F_SETLK; 1572 else 1573 action = F_SETLKW; 1574 1575 if (tTd(55, 60)) 1576 printf("lockfile(%s%s, action=%d, type=%d): ", 1577 filename, ext, action, lfd.l_type); 1578 1579 if (fcntl(fd, action, &lfd) >= 0) 1580 { 1581 if (tTd(55, 60)) 1582 printf("SUCCESS\n"); 1583 return TRUE; 1584 } 1585 1586 if (tTd(55, 60)) 1587 printf("(%s) ", errstring(errno)); 1588 1589 /* 1590 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 1591 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 1592 ** as type "tmp" (that is, served from swap space), the 1593 ** previous fcntl will fail with "Invalid argument" errors. 1594 ** Since this is fairly common during testing, we will assume 1595 ** that this indicates that the lock is successfully grabbed. 1596 */ 1597 1598 if (errno == EINVAL) 1599 { 1600 if (tTd(55, 60)) 1601 printf("SUCCESS\n"); 1602 return TRUE; 1603 } 1604 1605 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 1606 { 1607 int omode = -1; 1608 # ifdef F_GETFL 1609 int oerrno = errno; 1610 1611 (void) fcntl(fd, F_GETFL, &omode); 1612 errno = oerrno; 1613 # endif 1614 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1615 filename, ext, fd, type, omode, geteuid()); 1616 } 1617 # else 1618 if (ext == NULL) 1619 ext = ""; 1620 1621 if (tTd(55, 60)) 1622 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 1623 1624 if (flock(fd, type) >= 0) 1625 { 1626 if (tTd(55, 60)) 1627 printf("SUCCESS\n"); 1628 return TRUE; 1629 } 1630 1631 if (tTd(55, 60)) 1632 printf("(%s) ", errstring(errno)); 1633 1634 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 1635 { 1636 int omode = -1; 1637 # ifdef F_GETFL 1638 int oerrno = errno; 1639 1640 (void) fcntl(fd, F_GETFL, &omode); 1641 errno = oerrno; 1642 # endif 1643 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1644 filename, ext, fd, type, omode, geteuid()); 1645 } 1646 # endif 1647 if (tTd(55, 60)) 1648 printf("FAIL\n"); 1649 return FALSE; 1650 } 1651 /* 1652 ** GETCFNAME -- return the name of the .cf file. 1653 ** 1654 ** Some systems (e.g., NeXT) determine this dynamically. 1655 */ 1656 1657 char * 1658 getcfname() 1659 { 1660 if (ConfFile != NULL) 1661 return ConfFile; 1662 return _PATH_SENDMAILCF; 1663 } 1664