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 8.38 (Berkeley) 09/24/93"; 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 ** GETLA -- get the current load average 565 ** 566 ** This code stolen from la.c. 567 ** 568 ** Parameters: 569 ** none. 570 ** 571 ** Returns: 572 ** The current load average as an integer. 573 ** 574 ** Side Effects: 575 ** none. 576 */ 577 578 /* try to guess what style of load average we have */ 579 #define LA_ZERO 1 /* always return load average as zero */ 580 #define LA_INT 2 /* read kmem for avenrun; interpret as long */ 581 #define LA_FLOAT 3 /* read kmem for avenrun; interpret as float */ 582 #define LA_SUBR 4 /* call getloadavg */ 583 #define LA_MACH 5 /* MACH load averages (as on NeXT boxes) */ 584 #define LA_SHORT 6 /* read kmem for avenrun; interpret as short */ 585 586 /* do guesses based on general OS type */ 587 #ifndef LA_TYPE 588 # define LA_TYPE LA_ZERO 589 #endif 590 591 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_FLOAT) || (LA_TYPE == LA_SHORT) 592 593 #include <nlist.h> 594 595 #ifndef LA_AVENRUN 596 # ifdef SYSTEM5 597 # define LA_AVENRUN "avenrun" 598 # else 599 # define LA_AVENRUN "_avenrun" 600 # endif 601 #endif 602 603 /* _PATH_UNIX should be defined in <paths.h> */ 604 #ifndef _PATH_UNIX 605 # if defined(SYSTEM5) 606 # define _PATH_UNIX "/unix" 607 # else 608 # define _PATH_UNIX "/vmunix" 609 # endif 610 #endif 611 612 struct nlist Nl[] = 613 { 614 { LA_AVENRUN }, 615 #define X_AVENRUN 0 616 { 0 }, 617 }; 618 619 #ifndef FSHIFT 620 # if defined(unixpc) 621 # define FSHIFT 5 622 # endif 623 624 # if defined(__alpha) 625 # define FSHIFT 10 626 # endif 627 628 # if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 629 # define FSHIFT 8 630 # endif 631 #endif 632 633 #if ((LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT)) && !defined(FSCALE) 634 # define FSCALE (1 << FSHIFT) 635 #endif 636 637 getla() 638 { 639 static int kmem = -1; 640 #if LA_TYPE == LA_INT 641 long avenrun[3]; 642 #else 643 # if LA_TYPE == LA_SHORT 644 short avenrun[3]; 645 # else 646 double avenrun[3]; 647 # endif 648 #endif 649 extern off_t lseek(); 650 extern int errno; 651 652 if (kmem < 0) 653 { 654 kmem = open("/dev/kmem", 0, 0); 655 if (kmem < 0) 656 { 657 if (tTd(3, 1)) 658 printf("getla: open(/dev/kmem): %s\n", 659 errstring(errno)); 660 return (-1); 661 } 662 (void) fcntl(kmem, F_SETFD, 1); 663 if (nlist(_PATH_UNIX, Nl) < 0) 664 { 665 if (tTd(3, 1)) 666 printf("getla: nlist(%s): %s\n", _PATH_UNIX, 667 errstring(errno)); 668 return (-1); 669 } 670 if (Nl[X_AVENRUN].n_value == 0) 671 { 672 if (tTd(3, 1)) 673 printf("getla: nlist(%s, %s) ==> 0\n", 674 _PATH_UNIX, LA_AVENRUN); 675 return (-1); 676 } 677 } 678 if (tTd(3, 20)) 679 printf("getla: symbol address = %#x\n", Nl[X_AVENRUN].n_value); 680 if (lseek(kmem, (off_t) Nl[X_AVENRUN].n_value, 0) == -1 || 681 read(kmem, (char *) avenrun, sizeof(avenrun)) < sizeof(avenrun)) 682 { 683 /* thank you Ian */ 684 if (tTd(3, 1)) 685 printf("getla: lseek or read: %s\n", errstring(errno)); 686 return (-1); 687 } 688 #if (LA_TYPE == LA_INT) || (LA_TYPE == LA_SHORT) 689 if (tTd(3, 5)) 690 { 691 printf("getla: avenrun = %d", avenrun[0]); 692 if (tTd(3, 15)) 693 printf(", %d, %d", avenrun[1], avenrun[2]); 694 printf("\n"); 695 } 696 if (tTd(3, 1)) 697 printf("getla: %d\n", (int) (avenrun[0] + FSCALE/2) >> FSHIFT); 698 return ((int) (avenrun[0] + FSCALE/2) >> FSHIFT); 699 #else 700 if (tTd(3, 5)) 701 { 702 printf("getla: avenrun = %g", avenrun[0]); 703 if (tTd(3, 15)) 704 printf(", %g, %g", avenrun[1], avenrun[2]); 705 printf("\n"); 706 } 707 if (tTd(3, 1)) 708 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 709 return ((int) (avenrun[0] + 0.5)); 710 #endif 711 } 712 713 #else 714 #if LA_TYPE == LA_SUBR 715 716 getla() 717 { 718 double avenrun[3]; 719 720 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) < 0) 721 { 722 if (tTd(3, 1)) 723 perror("getla: getloadavg failed:"); 724 return (-1); 725 } 726 if (tTd(3, 1)) 727 printf("getla: %d\n", (int) (avenrun[0] +0.5)); 728 return ((int) (avenrun[0] + 0.5)); 729 } 730 731 #else 732 #if LA_TYPE == LA_MACH 733 734 /* 735 ** This has been tested on NeXT release 2.1. 736 */ 737 738 #include <mach.h> 739 740 getla() 741 { 742 processor_set_t default_set; 743 kern_return_t error; 744 unsigned int info_count; 745 struct processor_set_basic_info info; 746 host_t host; 747 748 error = processor_set_default(host_self(), &default_set); 749 if (error != KERN_SUCCESS) 750 return -1; 751 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; 752 if (processor_set_info(default_set, PROCESSOR_SET_BASIC_INFO, 753 &host, (processor_set_info_t)&info, 754 &info_count) != KERN_SUCCESS) 755 { 756 return -1; 757 } 758 return (int) (info.load_average + (LOAD_SCALE / 2)) / LOAD_SCALE; 759 } 760 761 762 #else 763 764 getla() 765 { 766 if (tTd(3, 1)) 767 printf("getla: ZERO\n"); 768 return (0); 769 } 770 771 #endif 772 #endif 773 #endif 774 /* 775 ** SHOULDQUEUE -- should this message be queued or sent? 776 ** 777 ** Compares the message cost to the load average to decide. 778 ** 779 ** Parameters: 780 ** pri -- the priority of the message in question. 781 ** ctime -- the message creation time. 782 ** 783 ** Returns: 784 ** TRUE -- if this message should be queued up for the 785 ** time being. 786 ** FALSE -- if the load is low enough to send this message. 787 ** 788 ** Side Effects: 789 ** none. 790 */ 791 792 bool 793 shouldqueue(pri, ctime) 794 long pri; 795 time_t ctime; 796 { 797 if (CurrentLA < QueueLA) 798 return (FALSE); 799 if (CurrentLA >= RefuseLA) 800 return (TRUE); 801 return (pri > (QueueFactor / (CurrentLA - QueueLA + 1))); 802 } 803 /* 804 ** REFUSECONNECTIONS -- decide if connections should be refused 805 ** 806 ** Parameters: 807 ** none. 808 ** 809 ** Returns: 810 ** TRUE if incoming SMTP connections should be refused 811 ** (for now). 812 ** FALSE if we should accept new work. 813 ** 814 ** Side Effects: 815 ** none. 816 */ 817 818 bool 819 refuseconnections() 820 { 821 #ifdef XLA 822 if (!xla_smtp_ok()) 823 return TRUE; 824 #endif 825 826 /* this is probably too simplistic */ 827 return (CurrentLA >= RefuseLA); 828 } 829 /* 830 ** SETPROCTITLE -- set process title for ps 831 ** 832 ** Parameters: 833 ** fmt -- a printf style format string. 834 ** a, b, c -- possible parameters to fmt. 835 ** 836 ** Returns: 837 ** none. 838 ** 839 ** Side Effects: 840 ** Clobbers argv of our main procedure so ps(1) will 841 ** display the title. 842 */ 843 844 #ifdef SETPROCTITLE 845 # ifdef __hpux 846 # include <sys/pstat.h> 847 # endif 848 # ifdef BSD4_4 849 # include <machine/vmparam.h> 850 # include <sys/exec.h> 851 # ifdef __bsdi__ 852 # undef PS_STRINGS /* BSDI 1.0 doesn't do PS_STRINGS as we expect */ 853 # endif 854 # ifdef PS_STRINGS 855 # define SETPROC_STATIC static 856 # endif 857 # endif 858 # ifndef SETPROC_STATIC 859 # define SETPROC_STATIC 860 # endif 861 #endif 862 863 /*VARARGS1*/ 864 #ifdef __STDC__ 865 setproctitle(char *fmt, ...) 866 #else 867 setproctitle(fmt, va_alist) 868 char *fmt; 869 va_dcl 870 #endif 871 { 872 # ifdef SETPROCTITLE 873 register char *p; 874 register int i; 875 SETPROC_STATIC char buf[MAXLINE]; 876 VA_LOCAL_DECL 877 # ifdef __hpux 878 union pstun pst; 879 # endif 880 extern char **Argv; 881 extern char *LastArgv; 882 883 p = buf; 884 885 /* print sendmail: heading for grep */ 886 (void) strcpy(p, "sendmail: "); 887 p += strlen(p); 888 889 /* print the argument string */ 890 VA_START(fmt); 891 (void) vsprintf(p, fmt, ap); 892 VA_END; 893 894 i = strlen(buf); 895 896 # ifdef __hpux 897 pst.pst_command = buf; 898 pstat(PSTAT_SETCMD, pst, i, 0, 0); 899 # else 900 # ifdef PS_STRINGS 901 PS_STRINGS->ps_nargvstr = 1; 902 PS_STRINGS->ps_argvstr = buf; 903 # else 904 if (i > LastArgv - Argv[0] - 2) 905 { 906 i = LastArgv - Argv[0] - 2; 907 buf[i] = '\0'; 908 } 909 (void) strcpy(Argv[0], buf); 910 p = &Argv[0][i]; 911 while (p < LastArgv) 912 *p++ = ' '; 913 # endif 914 # endif 915 # endif /* SETPROCTITLE */ 916 } 917 /* 918 ** REAPCHILD -- pick up the body of my child, lest it become a zombie 919 ** 920 ** Parameters: 921 ** none. 922 ** 923 ** Returns: 924 ** none. 925 ** 926 ** Side Effects: 927 ** Picks up extant zombies. 928 */ 929 930 void 931 reapchild() 932 { 933 # ifdef HASWAITPID 934 auto int status; 935 int count; 936 int pid; 937 938 count = 0; 939 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) 940 { 941 if (count++ > 1000) 942 { 943 syslog(LOG_ALERT, "reapchild: waitpid loop: pid=%d, status=%x", 944 pid, status); 945 break; 946 } 947 } 948 # else 949 # ifdef WNOHANG 950 union wait status; 951 952 while (wait3(&status, WNOHANG, (struct rusage *) NULL) > 0) 953 continue; 954 # else /* WNOHANG */ 955 auto int status; 956 957 while (wait(&status) > 0) 958 continue; 959 # endif /* WNOHANG */ 960 # endif 961 # ifdef SYS5SIGNALS 962 (void) setsignal(SIGCHLD, reapchild); 963 # endif 964 } 965 /* 966 ** UNSETENV -- remove a variable from the environment 967 ** 968 ** Not needed on newer systems. 969 ** 970 ** Parameters: 971 ** name -- the string name of the environment variable to be 972 ** deleted from the current environment. 973 ** 974 ** Returns: 975 ** none. 976 ** 977 ** Globals: 978 ** environ -- a pointer to the current environment. 979 ** 980 ** Side Effects: 981 ** Modifies environ. 982 */ 983 984 #ifndef HASUNSETENV 985 986 void 987 unsetenv(name) 988 char *name; 989 { 990 extern char **environ; 991 register char **pp; 992 int len = strlen(name); 993 994 for (pp = environ; *pp != NULL; pp++) 995 { 996 if (strncmp(name, *pp, len) == 0 && 997 ((*pp)[len] == '=' || (*pp)[len] == '\0')) 998 break; 999 } 1000 1001 for (; *pp != NULL; pp++) 1002 *pp = pp[1]; 1003 } 1004 1005 #endif 1006 /* 1007 ** GETDTABLESIZE -- return number of file descriptors 1008 ** 1009 ** Only on non-BSD systems 1010 ** 1011 ** Parameters: 1012 ** none 1013 ** 1014 ** Returns: 1015 ** size of file descriptor table 1016 ** 1017 ** Side Effects: 1018 ** none 1019 */ 1020 1021 #ifdef SOLARIS 1022 # include <sys/resource.h> 1023 #endif 1024 1025 int 1026 getdtsize() 1027 { 1028 #ifdef RLIMIT_NOFILE 1029 struct rlimit rl; 1030 1031 if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) 1032 return rl.rlim_cur; 1033 #endif 1034 1035 # ifdef HASGETDTABLESIZE 1036 return getdtablesize(); 1037 # else 1038 # ifdef _SC_OPEN_MAX 1039 return sysconf(_SC_OPEN_MAX); 1040 # else 1041 return NOFILE; 1042 # endif 1043 # endif 1044 } 1045 /* 1046 ** UNAME -- get the UUCP name of this system. 1047 */ 1048 1049 #ifndef HASUNAME 1050 1051 int 1052 uname(name) 1053 struct utsname *name; 1054 { 1055 FILE *file; 1056 char *n; 1057 1058 name->nodename[0] = '\0'; 1059 1060 /* try /etc/whoami -- one line with the node name */ 1061 if ((file = fopen("/etc/whoami", "r")) != NULL) 1062 { 1063 (void) fgets(name->nodename, NODE_LENGTH + 1, file); 1064 (void) fclose(file); 1065 n = strchr(name->nodename, '\n'); 1066 if (n != NULL) 1067 *n = '\0'; 1068 if (name->nodename[0] != '\0') 1069 return (0); 1070 } 1071 1072 /* try /usr/include/whoami.h -- has a #define somewhere */ 1073 if ((file = fopen("/usr/include/whoami.h", "r")) != NULL) 1074 { 1075 char buf[MAXLINE]; 1076 1077 while (fgets(buf, MAXLINE, file) != NULL) 1078 if (sscanf(buf, "#define sysname \"%*[^\"]\"", 1079 NODE_LENGTH, name->nodename) > 0) 1080 break; 1081 (void) fclose(file); 1082 if (name->nodename[0] != '\0') 1083 return (0); 1084 } 1085 1086 #ifdef TRUST_POPEN 1087 /* 1088 ** Popen is known to have security holes. 1089 */ 1090 1091 /* try uuname -l to return local name */ 1092 if ((file = popen("uuname -l", "r")) != NULL) 1093 { 1094 (void) fgets(name, NODE_LENGTH + 1, file); 1095 (void) pclose(file); 1096 n = strchr(name, '\n'); 1097 if (n != NULL) 1098 *n = '\0'; 1099 if (name->nodename[0] != '\0') 1100 return (0); 1101 } 1102 #endif 1103 1104 return (-1); 1105 } 1106 #endif /* HASUNAME */ 1107 /* 1108 ** INITGROUPS -- initialize groups 1109 ** 1110 ** Stub implementation for System V style systems 1111 */ 1112 1113 #ifndef HASINITGROUPS 1114 1115 initgroups(name, basegid) 1116 char *name; 1117 int basegid; 1118 { 1119 return 0; 1120 } 1121 1122 #endif 1123 /* 1124 ** SETSID -- set session id (for non-POSIX systems) 1125 */ 1126 1127 #ifndef HASSETSID 1128 1129 pid_t 1130 setsid __P ((void)) 1131 { 1132 #ifdef TIOCNOTTY 1133 int fd; 1134 1135 fd = open("/dev/tty", 2); 1136 if (fd >= 0) 1137 { 1138 (void) ioctl(fd, (int) TIOCNOTTY, (char *) 0); 1139 (void) close(fd); 1140 } 1141 #endif /* TIOCNOTTY */ 1142 # ifdef SYSTEM5 1143 return setpgrp(); 1144 # else 1145 return setpgid(0, getpid()); 1146 # endif 1147 } 1148 1149 #endif 1150 /* 1151 ** GETOPT -- for old systems or systems with bogus implementations 1152 */ 1153 1154 #ifdef NEEDGETOPT 1155 1156 /* 1157 * Copyright (c) 1985 Regents of the University of California. 1158 * All rights reserved. The Berkeley software License Agreement 1159 * specifies the terms and conditions for redistribution. 1160 */ 1161 1162 1163 /* 1164 ** this version hacked to add `atend' flag to allow state machine 1165 ** to reset if invoked by the program to scan args for a 2nd time 1166 */ 1167 1168 #if defined(LIBC_SCCS) && !defined(lint) 1169 static char sccsid[] = "@(#)getopt.c 4.3 (Berkeley) 3/9/86"; 1170 #endif /* LIBC_SCCS and not lint */ 1171 1172 #include <stdio.h> 1173 1174 /* 1175 * get option letter from argument vector 1176 */ 1177 int opterr = 1, /* if error message should be printed */ 1178 optind = 1, /* index into parent argv vector */ 1179 optopt; /* character checked for validity */ 1180 char *optarg; /* argument associated with option */ 1181 1182 #define BADCH (int)'?' 1183 #define EMSG "" 1184 #define tell(s) if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \ 1185 fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);} 1186 1187 getopt(nargc,nargv,ostr) 1188 int nargc; 1189 char **nargv, 1190 *ostr; 1191 { 1192 static char *place = EMSG; /* option letter processing */ 1193 static char atend = 0; 1194 register char *oli; /* option letter list index */ 1195 1196 if (atend) { 1197 atend = 0; 1198 place = EMSG; 1199 } 1200 if(!*place) { /* update scanning pointer */ 1201 if (optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) { 1202 atend++; 1203 return(EOF); 1204 } 1205 if (*place == '-') { /* found "--" */ 1206 ++optind; 1207 atend++; 1208 return(EOF); 1209 } 1210 } /* option letter okay? */ 1211 if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr,optopt))) { 1212 if (!*place) ++optind; 1213 tell(": illegal option -- "); 1214 } 1215 if (*++oli != ':') { /* don't need argument */ 1216 optarg = NULL; 1217 if (!*place) ++optind; 1218 } 1219 else { /* need an argument */ 1220 if (*place) optarg = place; /* no white space */ 1221 else if (nargc <= ++optind) { /* no arg */ 1222 place = EMSG; 1223 tell(": option requires an argument -- "); 1224 } 1225 else optarg = nargv[optind]; /* white space */ 1226 place = EMSG; 1227 ++optind; 1228 } 1229 return(optopt); /* dump back option letter */ 1230 } 1231 1232 #endif 1233 /* 1234 ** VFPRINTF, VSPRINTF -- for old 4.3 BSD systems missing a real version 1235 */ 1236 1237 #ifdef NEEDVPRINTF 1238 1239 #define MAXARG 16 1240 1241 vfprintf(fp, fmt, ap) 1242 FILE * fp; 1243 char * fmt; 1244 char ** ap; 1245 { 1246 char * bp[MAXARG]; 1247 int i = 0; 1248 1249 while (*ap && i < MAXARG) 1250 bp[i++] = *ap++; 1251 fprintf(fp, fmt, bp[0], bp[1], bp[2], bp[3], 1252 bp[4], bp[5], bp[6], bp[7], 1253 bp[8], bp[9], bp[10], bp[11], 1254 bp[12], bp[13], bp[14], bp[15]); 1255 } 1256 1257 vsprintf(s, fmt, ap) 1258 char * s; 1259 char * fmt; 1260 char ** ap; 1261 { 1262 char * bp[MAXARG]; 1263 int i = 0; 1264 1265 while (*ap && i < MAXARG) 1266 bp[i++] = *ap++; 1267 sprintf(s, fmt, bp[0], bp[1], bp[2], bp[3], 1268 bp[4], bp[5], bp[6], bp[7], 1269 bp[8], bp[9], bp[10], bp[11], 1270 bp[12], bp[13], bp[14], bp[15]); 1271 } 1272 1273 #endif 1274 /* 1275 ** FREESPACE -- see how much free space is on the queue filesystem 1276 ** 1277 ** Only implemented if you have statfs. 1278 ** 1279 ** Parameters: 1280 ** dir -- the directory in question. 1281 ** bsize -- a variable into which the filesystem 1282 ** block size is stored. 1283 ** 1284 ** Returns: 1285 ** The number of bytes free on the queue filesystem. 1286 ** -1 if the statfs call fails. 1287 ** 1288 ** Side effects: 1289 ** Puts the filesystem block size into bsize. 1290 */ 1291 1292 #ifdef HASSTATFS 1293 # undef HASUSTAT 1294 #endif 1295 1296 #if defined(HASUSTAT) 1297 # include <ustat.h> 1298 #endif 1299 1300 #ifdef HASSTATFS 1301 # if defined(IRIX) || defined(apollo) || defined(_SCO_unix_) 1302 # include <sys/statfs.h> 1303 # else 1304 # if (defined(sun) && !defined(BSD)) || defined(__hpux) || defined(_CONVEX_SOURCE) || defined(NeXT) || defined(_AUX_SOURCE) 1305 # include <sys/vfs.h> 1306 # else 1307 # include <sys/mount.h> 1308 # endif 1309 # endif 1310 #endif 1311 1312 long 1313 freespace(dir, bsize) 1314 char *dir; 1315 long *bsize; 1316 { 1317 #if defined(HASSTATFS) || defined(HASUSTAT) 1318 # if defined(HASUSTAT) 1319 struct ustat fs; 1320 struct stat statbuf; 1321 # define FSBLOCKSIZE DEV_BSIZE 1322 # define f_bavail f_tfree 1323 # else 1324 # if defined(ultrix) 1325 struct fs_data fs; 1326 # define f_bavail fd_bfreen 1327 # define FSBLOCKSIZE fs.fd_bsize 1328 # else 1329 struct statfs fs; 1330 # define FSBLOCKSIZE fs.f_bsize 1331 # if defined(_SCO_unix_) || defined(IRIX) 1332 # define f_bavail f_bfree 1333 # endif 1334 # endif 1335 # endif 1336 extern int errno; 1337 1338 # if defined(HASUSTAT) 1339 if (stat(dir, &statbuf) == 0 && ustat(statbuf.st_dev, &fs) == 0) 1340 # else 1341 # if defined(IRIX) || defined(apollo) 1342 if (statfs(dir, &fs, sizeof fs, 0) == 0) 1343 # else 1344 # if defined(ultrix) 1345 if (statfs(dir, &fs) > 0) 1346 # else 1347 if (statfs(dir, &fs) == 0) 1348 # endif 1349 # endif 1350 # endif 1351 { 1352 if (bsize != NULL) 1353 *bsize = FSBLOCKSIZE; 1354 return (fs.f_bavail); 1355 } 1356 #endif 1357 return (-1); 1358 } 1359 /* 1360 ** ENOUGHSPACE -- check to see if there is enough free space on the queue fs 1361 ** 1362 ** Only implemented if you have statfs. 1363 ** 1364 ** Parameters: 1365 ** msize -- the size to check against. If zero, we don't yet 1366 ** know how big the message will be, so just check for 1367 ** a "reasonable" amount. 1368 ** 1369 ** Returns: 1370 ** TRUE if there is enough space. 1371 ** FALSE otherwise. 1372 */ 1373 1374 bool 1375 enoughspace(msize) 1376 long msize; 1377 { 1378 long bfree, bsize; 1379 1380 if (MinBlocksFree <= 0 && msize <= 0) 1381 { 1382 if (tTd(4, 80)) 1383 printf("enoughspace: no threshold\n"); 1384 return TRUE; 1385 } 1386 1387 if ((bfree = freespace(QueueDir, &bsize)) >= 0) 1388 { 1389 if (tTd(4, 80)) 1390 printf("enoughspace: bavail=%ld, need=%ld\n", 1391 bfree, msize); 1392 1393 /* convert msize to block count */ 1394 msize = msize / bsize + 1; 1395 if (MinBlocksFree >= 0) 1396 msize += MinBlocksFree; 1397 1398 if (bfree < msize) 1399 { 1400 #ifdef LOG 1401 if (LogLevel > 0) 1402 syslog(LOG_ALERT, 1403 "%s: low on space (have %ld, %s needs %ld in %s)", 1404 CurEnv->e_id, bfree, 1405 CurHostName, msize, QueueDir); 1406 #endif 1407 return FALSE; 1408 } 1409 } 1410 else if (tTd(4, 80)) 1411 printf("enoughspace failure: min=%ld, need=%ld: %s\n", 1412 MinBlocksFree, msize, errstring(errno)); 1413 return TRUE; 1414 } 1415 /* 1416 ** TRANSIENTERROR -- tell if an error code indicates a transient failure 1417 ** 1418 ** This looks at an errno value and tells if this is likely to 1419 ** go away if retried later. 1420 ** 1421 ** Parameters: 1422 ** err -- the errno code to classify. 1423 ** 1424 ** Returns: 1425 ** TRUE if this is probably transient. 1426 ** FALSE otherwise. 1427 */ 1428 1429 bool 1430 transienterror(err) 1431 int err; 1432 { 1433 switch (err) 1434 { 1435 case EIO: /* I/O error */ 1436 case ENXIO: /* Device not configured */ 1437 case EAGAIN: /* Resource temporarily unavailable */ 1438 case ENOMEM: /* Cannot allocate memory */ 1439 case ENODEV: /* Operation not supported by device */ 1440 case ENFILE: /* Too many open files in system */ 1441 case EMFILE: /* Too many open files */ 1442 case ENOSPC: /* No space left on device */ 1443 #ifdef ETIMEDOUT 1444 case ETIMEDOUT: /* Connection timed out */ 1445 #endif 1446 #ifdef ESTALE 1447 case ESTALE: /* Stale NFS file handle */ 1448 #endif 1449 #ifdef ENETDOWN 1450 case ENETDOWN: /* Network is down */ 1451 #endif 1452 #ifdef ENETUNREACH 1453 case ENETUNREACH: /* Network is unreachable */ 1454 #endif 1455 #ifdef ENETRESET 1456 case ENETRESET: /* Network dropped connection on reset */ 1457 #endif 1458 #ifdef ECONNABORTED 1459 case ECONNABORTED: /* Software caused connection abort */ 1460 #endif 1461 #ifdef ECONNRESET 1462 case ECONNRESET: /* Connection reset by peer */ 1463 #endif 1464 #ifdef ENOBUFS 1465 case ENOBUFS: /* No buffer space available */ 1466 #endif 1467 #ifdef ESHUTDOWN 1468 case ESHUTDOWN: /* Can't send after socket shutdown */ 1469 #endif 1470 #ifdef ECONNREFUSED 1471 case ECONNREFUSED: /* Connection refused */ 1472 #endif 1473 #ifdef EHOSTDOWN 1474 case EHOSTDOWN: /* Host is down */ 1475 #endif 1476 #ifdef EHOSTUNREACH 1477 case EHOSTUNREACH: /* No route to host */ 1478 #endif 1479 #ifdef EDQUOT 1480 case EDQUOT: /* Disc quota exceeded */ 1481 #endif 1482 #ifdef EPROCLIM 1483 case EPROCLIM: /* Too many processes */ 1484 #endif 1485 #ifdef EUSERS 1486 case EUSERS: /* Too many users */ 1487 #endif 1488 #ifdef EDEADLK 1489 case EDEADLK: /* Resource deadlock avoided */ 1490 #endif 1491 #ifdef EISCONN 1492 case EISCONN: /* Socket already connected */ 1493 #endif 1494 #ifdef EINPROGRESS 1495 case EINPROGRESS: /* Operation now in progress */ 1496 #endif 1497 #ifdef EALREADY 1498 case EALREADY: /* Operation already in progress */ 1499 #endif 1500 #ifdef EADDRINUSE 1501 case EADDRINUSE: /* Address already in use */ 1502 #endif 1503 #ifdef EADDRNOTAVAIL 1504 case EADDRNOTAVAIL: /* Can't assign requested address */ 1505 #endif 1506 #if defined(ENOSR) && (!defined(ENOBUFS) || (ENOBUFS != ENOSR)) 1507 case ENOSR: /* Out of streams resources */ 1508 #endif 1509 return TRUE; 1510 } 1511 1512 /* nope, must be permanent */ 1513 return FALSE; 1514 } 1515 /* 1516 ** LOCKFILE -- lock a file using flock or (shudder) fcntl locking 1517 ** 1518 ** Parameters: 1519 ** fd -- the file descriptor of the file. 1520 ** filename -- the file name (for error messages). 1521 ** ext -- the filename extension. 1522 ** type -- type of the lock. Bits can be: 1523 ** LOCK_EX -- exclusive lock. 1524 ** LOCK_NB -- non-blocking. 1525 ** 1526 ** Returns: 1527 ** TRUE if the lock was acquired. 1528 ** FALSE otherwise. 1529 */ 1530 1531 bool 1532 lockfile(fd, filename, ext, type) 1533 int fd; 1534 char *filename; 1535 char *ext; 1536 int type; 1537 { 1538 # ifndef HASFLOCK 1539 int action; 1540 struct flock lfd; 1541 1542 if (ext == NULL) 1543 ext = ""; 1544 1545 bzero(&lfd, sizeof lfd); 1546 if (bitset(LOCK_UN, type)) 1547 lfd.l_type = F_UNLCK; 1548 else if (bitset(LOCK_EX, type)) 1549 lfd.l_type = F_WRLCK; 1550 else 1551 lfd.l_type = F_RDLCK; 1552 1553 if (bitset(LOCK_NB, type)) 1554 action = F_SETLK; 1555 else 1556 action = F_SETLKW; 1557 1558 if (tTd(55, 60)) 1559 printf("lockfile(%s%s, action=%d, type=%d): ", 1560 filename, ext, action, lfd.l_type); 1561 1562 if (fcntl(fd, action, &lfd) >= 0) 1563 { 1564 if (tTd(55, 60)) 1565 printf("SUCCESS\n"); 1566 return TRUE; 1567 } 1568 1569 if (tTd(55, 60)) 1570 printf("(%s) ", errstring(errno)); 1571 1572 /* 1573 ** On SunOS, if you are testing using -oQ/tmp/mqueue or 1574 ** -oA/tmp/aliases or anything like that, and /tmp is mounted 1575 ** as type "tmp" (that is, served from swap space), the 1576 ** previous fcntl will fail with "Invalid argument" errors. 1577 ** Since this is fairly common during testing, we will assume 1578 ** that this indicates that the lock is successfully grabbed. 1579 */ 1580 1581 if (errno == EINVAL) 1582 { 1583 if (tTd(55, 60)) 1584 printf("SUCCESS\n"); 1585 return TRUE; 1586 } 1587 1588 if (!bitset(LOCK_NB, type) || (errno != EACCES && errno != EAGAIN)) 1589 { 1590 int omode = -1; 1591 # ifdef F_GETFL 1592 int oerrno = errno; 1593 1594 (void) fcntl(fd, F_GETFL, &omode); 1595 errno = oerrno; 1596 # endif 1597 syserr("cannot lockf(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1598 filename, ext, fd, type, omode, geteuid()); 1599 } 1600 # else 1601 if (ext == NULL) 1602 ext = ""; 1603 1604 if (tTd(55, 60)) 1605 printf("lockfile(%s%s, type=%o): ", filename, ext, type); 1606 1607 if (flock(fd, type) >= 0) 1608 { 1609 if (tTd(55, 60)) 1610 printf("SUCCESS\n"); 1611 return TRUE; 1612 } 1613 1614 if (tTd(55, 60)) 1615 printf("(%s) ", errstring(errno)); 1616 1617 if (!bitset(LOCK_NB, type) || errno != EWOULDBLOCK) 1618 { 1619 int omode = -1; 1620 # ifdef F_GETFL 1621 int oerrno = errno; 1622 1623 (void) fcntl(fd, F_GETFL, &omode); 1624 errno = oerrno; 1625 # endif 1626 syserr("cannot flock(%s%s, fd=%d, type=%o, omode=%o, euid=%d)", 1627 filename, ext, fd, type, omode, geteuid()); 1628 } 1629 # endif 1630 if (tTd(55, 60)) 1631 printf("FAIL\n"); 1632 return FALSE; 1633 } 1634 /* 1635 ** GETCFNAME -- return the name of the .cf file. 1636 ** 1637 ** Some systems (e.g., NeXT) determine this dynamically. 1638 */ 1639 1640 char * 1641 getcfname() 1642 { 1643 if (ConfFile != NULL) 1644 return ConfFile; 1645 return _PATH_SENDMAILCF; 1646 } 1647