1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 # include "sendmail.h" 10 11 #ifndef lint 12 #ifdef QUEUE 13 static char sccsid[] = "@(#)queue.c 5.44 (Berkeley) 07/12/92 (with queueing)"; 14 #else 15 static char sccsid[] = "@(#)queue.c 5.44 (Berkeley) 07/12/92 (without queueing)"; 16 #endif 17 #endif /* not lint */ 18 19 # include <sys/stat.h> 20 # include <sys/dir.h> 21 # include <sys/file.h> 22 # include <signal.h> 23 # include <errno.h> 24 # include <pwd.h> 25 # ifdef LOCKF 26 # include <fcntl.h> 27 # endif 28 29 # ifdef QUEUE 30 31 /* 32 ** Work queue. 33 */ 34 35 struct work 36 { 37 char *w_name; /* name of control file */ 38 long w_pri; /* priority of message, see below */ 39 time_t w_ctime; /* creation time of message */ 40 struct work *w_next; /* next in queue */ 41 }; 42 43 typedef struct work WORK; 44 45 WORK *WorkQ; /* queue of things to be done */ 46 /* 47 ** QUEUEUP -- queue a message up for future transmission. 48 ** 49 ** Parameters: 50 ** e -- the envelope to queue up. 51 ** queueall -- if TRUE, queue all addresses, rather than 52 ** just those with the QQUEUEUP flag set. 53 ** announce -- if TRUE, tell when you are queueing up. 54 ** 55 ** Returns: 56 ** none. 57 ** 58 ** Side Effects: 59 ** The current request are saved in a control file. 60 ** The queue file is left locked. 61 */ 62 63 queueup(e, queueall, announce) 64 register ENVELOPE *e; 65 bool queueall; 66 bool announce; 67 { 68 char *qf; 69 register FILE *tfp; 70 register HDR *h; 71 register ADDRESS *q; 72 int fd; 73 int i; 74 bool newid; 75 register char *p; 76 MAILER nullmailer; 77 ADDRESS *lastctladdr; 78 static ADDRESS *nullctladdr = NULL; 79 char buf[MAXLINE], tf[MAXLINE]; 80 extern char *macvalue(); 81 extern ADDRESS *getctladdr(); 82 83 /* 84 ** If we don't have nullctladdr, create one 85 */ 86 87 if (nullctladdr == NULL) 88 { 89 nullctladdr = (ADDRESS *) xalloc(sizeof *nullctladdr); 90 bzero((char *) nullctladdr, sizeof nullctladdr); 91 } 92 93 /* 94 ** Create control file. 95 */ 96 97 newid = (e->e_id == NULL); 98 strcpy(tf, queuename(e, 't')); 99 tfp = e->e_lockfp; 100 if (tfp == NULL) 101 newid = FALSE; 102 if (newid) 103 { 104 tfp = e->e_lockfp; 105 } 106 else 107 { 108 /* get a locked tf file */ 109 for (i = 100; --i >= 0; ) 110 { 111 # ifdef LOCKF 112 struct flock lfd; 113 # endif 114 115 fd = open(tf, O_CREAT|O_WRONLY|O_EXCL, FileMode); 116 if (fd < 0) 117 { 118 if (errno == EEXIST) 119 continue; 120 syserr("queueup: cannot create temp file %s", tf); 121 return; 122 } 123 # ifdef LOCKF 124 lfd.l_type = F_WRLCK; 125 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 126 if (fcntl(fd, F_SETLK, &lfd) >= 0) 127 break; 128 if (errno != EACCES && errno != EAGAIN) 129 syserr("cannot lockf(%s)", tf); 130 # else 131 if (flock(fd, LOCK_EX|LOCK_NB) >= 0) 132 break; 133 if (errno != EWOULDBLOCK) 134 syserr("cannot flock(%s)", tf); 135 # endif 136 close(fd); 137 } 138 139 tfp = fdopen(fd, "w"); 140 } 141 142 if (tTd(40, 1)) 143 printf("queueing %s\n", e->e_id); 144 145 /* 146 ** If there is no data file yet, create one. 147 */ 148 149 if (e->e_df == NULL) 150 { 151 register FILE *dfp; 152 extern putbody(); 153 154 e->e_df = newstr(queuename(e, 'd')); 155 fd = open(e->e_df, O_WRONLY|O_CREAT, FileMode); 156 if (fd < 0) 157 { 158 syserr("queueup: cannot create %s", e->e_df); 159 if (!newid) 160 (void) fclose(tfp); 161 return; 162 } 163 dfp = fdopen(fd, "w"); 164 (*e->e_putbody)(dfp, ProgMailer, e); 165 (void) fclose(dfp); 166 e->e_putbody = putbody; 167 } 168 169 /* 170 ** Output future work requests. 171 ** Priority and creation time should be first, since 172 ** they are required by orderq. 173 */ 174 175 /* output message priority */ 176 fprintf(tfp, "P%ld\n", e->e_msgpriority); 177 178 /* output creation time */ 179 fprintf(tfp, "T%ld\n", e->e_ctime); 180 181 /* output name of data file */ 182 fprintf(tfp, "D%s\n", e->e_df); 183 184 /* message from envelope, if it exists */ 185 if (e->e_message != NULL) 186 fprintf(tfp, "M%s\n", e->e_message); 187 188 /* $r and $s macro values */ 189 if ((p = macvalue('r', e)) != NULL) 190 fprintf(tfp, "$r%s\n", p); 191 if ((p = macvalue('s', e)) != NULL) 192 fprintf(tfp, "$s%s\n", p); 193 194 /* output name of sender */ 195 fprintf(tfp, "S%s\n", e->e_from.q_paddr); 196 197 /* output list of recipient addresses */ 198 lastctladdr = NULL; 199 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 200 { 201 if (queueall ? !bitset(QDONTSEND|QSENT, q->q_flags) : 202 bitset(QQUEUEUP, q->q_flags)) 203 { 204 ADDRESS *ctladdr; 205 206 ctladdr = getctladdr(q); 207 if (ctladdr == NULL && q->q_alias != NULL) 208 ctladdr = nullctladdr; 209 if (ctladdr != lastctladdr) 210 { 211 printctladdr(ctladdr, tfp); 212 lastctladdr = ctladdr; 213 } 214 fprintf(tfp, "R%s\n", q->q_paddr); 215 if (announce) 216 { 217 e->e_to = q->q_paddr; 218 message(Arpa_Info, "queued"); 219 if (LogLevel > 4) 220 logdelivery("queued", e); 221 e->e_to = NULL; 222 } 223 if (tTd(40, 1)) 224 { 225 printf("queueing "); 226 printaddr(q, FALSE); 227 } 228 } 229 } 230 231 /* output list of error recipients */ 232 for (q = e->e_errorqueue; q != NULL; q = q->q_next) 233 { 234 if (!bitset(QDONTSEND, q->q_flags)) 235 { 236 ADDRESS *ctladdr; 237 238 ctladdr = getctladdr(q); 239 if (ctladdr == NULL && q->q_alias != NULL) 240 ctladdr = nullctladdr; 241 if (ctladdr != lastctladdr) 242 { 243 printctladdr(ctladdr, tfp); 244 lastctladdr = ctladdr; 245 } 246 fprintf(tfp, "E%s\n", q->q_paddr); 247 } 248 } 249 250 /* 251 ** Output headers for this message. 252 ** Expand macros completely here. Queue run will deal with 253 ** everything as absolute headers. 254 ** All headers that must be relative to the recipient 255 ** can be cracked later. 256 ** We set up a "null mailer" -- i.e., a mailer that will have 257 ** no effect on the addresses as they are output. 258 */ 259 260 bzero((char *) &nullmailer, sizeof nullmailer); 261 nullmailer.m_r_rwset = nullmailer.m_s_rwset = -1; 262 nullmailer.m_eol = "\n"; 263 264 define('g', "\001f", e); 265 for (h = e->e_header; h != NULL; h = h->h_link) 266 { 267 extern bool bitzerop(); 268 269 /* don't output null headers */ 270 if (h->h_value == NULL || h->h_value[0] == '\0') 271 continue; 272 273 /* don't output resent headers on non-resent messages */ 274 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 275 continue; 276 277 /* output this header */ 278 fprintf(tfp, "H"); 279 280 /* if conditional, output the set of conditions */ 281 if (!bitzerop(h->h_mflags) && bitset(H_CHECK|H_ACHECK, h->h_flags)) 282 { 283 int j; 284 285 (void) putc('?', tfp); 286 for (j = '\0'; j <= '\177'; j++) 287 if (bitnset(j, h->h_mflags)) 288 (void) putc(j, tfp); 289 (void) putc('?', tfp); 290 } 291 292 /* output the header: expand macros, convert addresses */ 293 if (bitset(H_DEFAULT, h->h_flags)) 294 { 295 (void) expand(h->h_value, buf, &buf[sizeof buf], e); 296 fprintf(tfp, "%s: %s\n", h->h_field, buf); 297 } 298 else if (bitset(H_FROM|H_RCPT, h->h_flags)) 299 { 300 commaize(h, h->h_value, tfp, 301 bitset(EF_OLDSTYLE, e->e_flags), 302 &nullmailer, e); 303 } 304 else 305 fprintf(tfp, "%s: %s\n", h->h_field, h->h_value); 306 } 307 308 /* 309 ** Clean up. 310 */ 311 312 if (!newid) 313 { 314 qf = queuename(e, 'q'); 315 if (rename(tf, qf) < 0) 316 syserr("cannot rename(%s, %s), df=%s", tf, qf, e->e_df); 317 if (e->e_lockfp != NULL) 318 (void) fclose(e->e_lockfp); 319 e->e_lockfp = tfp; 320 } 321 else 322 qf = tf; 323 errno = 0; 324 325 # ifdef LOG 326 /* save log info */ 327 if (LogLevel > 15) 328 syslog(LOG_DEBUG, "%s: queueup, qf=%s, df=%s\n", e->e_id, qf, e->e_df); 329 # endif LOG 330 fflush(tfp); 331 return; 332 } 333 334 printctladdr(a, tfp) 335 ADDRESS *a; 336 FILE *tfp; 337 { 338 char *u; 339 struct passwd *pw; 340 extern struct passwd *getpwuid(); 341 342 if (a == NULL) 343 { 344 fprintf(tfp, "C\n"); 345 return; 346 } 347 if (a->q_uid == 0 || (pw = getpwuid(a->q_uid)) == NULL) 348 u = DefUser; 349 else 350 u = pw->pw_name; 351 fprintf(tfp, "C%s\n", u); 352 } 353 354 /* 355 ** RUNQUEUE -- run the jobs in the queue. 356 ** 357 ** Gets the stuff out of the queue in some presumably logical 358 ** order and processes them. 359 ** 360 ** Parameters: 361 ** forkflag -- TRUE if the queue scanning should be done in 362 ** a child process. We double-fork so it is not our 363 ** child and we don't have to clean up after it. 364 ** 365 ** Returns: 366 ** none. 367 ** 368 ** Side Effects: 369 ** runs things in the mail queue. 370 */ 371 372 runqueue(forkflag, e) 373 bool forkflag; 374 register ENVELOPE *e; 375 { 376 extern bool shouldqueue(); 377 378 /* 379 ** If no work will ever be selected, don't even bother reading 380 ** the queue. 381 */ 382 383 CurrentLA = getla(); /* get load average */ 384 385 if (shouldqueue(-100000000L)) 386 { 387 if (Verbose) 388 printf("Skipping queue run -- load average too high\n"); 389 390 if (forkflag) 391 return; 392 finis(); 393 } 394 395 /* 396 ** See if we want to go off and do other useful work. 397 */ 398 399 if (forkflag) 400 { 401 int pid; 402 403 pid = dofork(); 404 if (pid != 0) 405 { 406 extern void reapchild(); 407 408 /* parent -- pick up intermediate zombie */ 409 #ifndef SIGCHLD 410 (void) waitfor(pid); 411 #else SIGCHLD 412 (void) signal(SIGCHLD, reapchild); 413 #endif SIGCHLD 414 if (QueueIntvl != 0) 415 (void) setevent(QueueIntvl, runqueue, TRUE); 416 return; 417 } 418 /* child -- double fork */ 419 #ifndef SIGCHLD 420 if (fork() != 0) 421 exit(EX_OK); 422 #else SIGCHLD 423 (void) signal(SIGCHLD, SIG_DFL); 424 #endif SIGCHLD 425 } 426 427 setproctitle("running queue: %s", QueueDir); 428 429 # ifdef LOG 430 if (LogLevel > 11) 431 syslog(LOG_DEBUG, "runqueue %s, pid=%d", QueueDir, getpid()); 432 # endif LOG 433 434 /* 435 ** Release any resources used by the daemon code. 436 */ 437 438 # ifdef DAEMON 439 clrdaemon(); 440 # endif DAEMON 441 442 /* 443 ** Make sure the alias database is open. 444 */ 445 446 initaliases(AliasFile, FALSE, e); 447 448 /* 449 ** Start making passes through the queue. 450 ** First, read and sort the entire queue. 451 ** Then, process the work in that order. 452 ** But if you take too long, start over. 453 */ 454 455 /* order the existing work requests */ 456 (void) orderq(FALSE); 457 458 /* process them once at a time */ 459 while (WorkQ != NULL) 460 { 461 WORK *w = WorkQ; 462 463 WorkQ = WorkQ->w_next; 464 dowork(w, e); 465 free(w->w_name); 466 free((char *) w); 467 } 468 469 /* exit without the usual cleanup */ 470 exit(ExitStat); 471 } 472 /* 473 ** ORDERQ -- order the work queue. 474 ** 475 ** Parameters: 476 ** doall -- if set, include everything in the queue (even 477 ** the jobs that cannot be run because the load 478 ** average is too high). Otherwise, exclude those 479 ** jobs. 480 ** 481 ** Returns: 482 ** The number of request in the queue (not necessarily 483 ** the number of requests in WorkQ however). 484 ** 485 ** Side Effects: 486 ** Sets WorkQ to the queue of available work, in order. 487 */ 488 489 # define NEED_P 001 490 # define NEED_T 002 491 492 orderq(doall) 493 bool doall; 494 { 495 register struct direct *d; 496 register WORK *w; 497 DIR *f; 498 register int i; 499 WORK wlist[QUEUESIZE+1]; 500 int wn = -1; 501 extern workcmpf(); 502 503 /* clear out old WorkQ */ 504 for (w = WorkQ; w != NULL; ) 505 { 506 register WORK *nw = w->w_next; 507 508 WorkQ = nw; 509 free(w->w_name); 510 free((char *) w); 511 w = nw; 512 } 513 514 /* open the queue directory */ 515 f = opendir("."); 516 if (f == NULL) 517 { 518 syserr("orderq: cannot open \"%s\" as \".\"", QueueDir); 519 return (0); 520 } 521 522 /* 523 ** Read the work directory. 524 */ 525 526 while ((d = readdir(f)) != NULL) 527 { 528 FILE *cf; 529 char lbuf[MAXNAME]; 530 531 /* is this an interesting entry? */ 532 if (d->d_name[0] != 'q' || d->d_name[1] != 'f') 533 continue; 534 535 /* yes -- open control file (if not too many files) */ 536 if (++wn >= QUEUESIZE) 537 continue; 538 cf = fopen(d->d_name, "r"); 539 if (cf == NULL) 540 { 541 /* this may be some random person sending hir msgs */ 542 /* syserr("orderq: cannot open %s", cbuf); */ 543 if (tTd(41, 2)) 544 printf("orderq: cannot open %s (%d)\n", 545 d->d_name, errno); 546 errno = 0; 547 wn--; 548 continue; 549 } 550 w = &wlist[wn]; 551 w->w_name = newstr(d->d_name); 552 553 /* make sure jobs in creation don't clog queue */ 554 w->w_pri = 0x7fffffff; 555 w->w_ctime = 0; 556 557 /* extract useful information */ 558 i = NEED_P | NEED_T; 559 while (i != 0 && fgets(lbuf, sizeof lbuf, cf) != NULL) 560 { 561 extern long atol(); 562 563 switch (lbuf[0]) 564 { 565 case 'P': 566 w->w_pri = atol(&lbuf[1]); 567 i &= ~NEED_P; 568 break; 569 570 case 'T': 571 w->w_ctime = atol(&lbuf[1]); 572 i &= ~NEED_T; 573 break; 574 } 575 } 576 (void) fclose(cf); 577 578 if (!doall && shouldqueue(w->w_pri)) 579 { 580 /* don't even bother sorting this job in */ 581 wn--; 582 } 583 } 584 (void) closedir(f); 585 wn++; 586 587 /* 588 ** Sort the work directory. 589 */ 590 591 qsort((char *) wlist, min(wn, QUEUESIZE), sizeof *wlist, workcmpf); 592 593 /* 594 ** Convert the work list into canonical form. 595 ** Should be turning it into a list of envelopes here perhaps. 596 */ 597 598 WorkQ = NULL; 599 for (i = min(wn, QUEUESIZE); --i >= 0; ) 600 { 601 w = (WORK *) xalloc(sizeof *w); 602 w->w_name = wlist[i].w_name; 603 w->w_pri = wlist[i].w_pri; 604 w->w_ctime = wlist[i].w_ctime; 605 w->w_next = WorkQ; 606 WorkQ = w; 607 } 608 609 if (tTd(40, 1)) 610 { 611 for (w = WorkQ; w != NULL; w = w->w_next) 612 printf("%32s: pri=%ld\n", w->w_name, w->w_pri); 613 } 614 615 return (wn); 616 } 617 /* 618 ** WORKCMPF -- compare function for ordering work. 619 ** 620 ** Parameters: 621 ** a -- the first argument. 622 ** b -- the second argument. 623 ** 624 ** Returns: 625 ** -1 if a < b 626 ** 0 if a == b 627 ** +1 if a > b 628 ** 629 ** Side Effects: 630 ** none. 631 */ 632 633 workcmpf(a, b) 634 register WORK *a; 635 register WORK *b; 636 { 637 long pa = a->w_pri + a->w_ctime; 638 long pb = b->w_pri + b->w_ctime; 639 640 if (pa == pb) 641 return (0); 642 else if (pa > pb) 643 return (1); 644 else 645 return (-1); 646 } 647 /* 648 ** DOWORK -- do a work request. 649 ** 650 ** Parameters: 651 ** w -- the work request to be satisfied. 652 ** 653 ** Returns: 654 ** none. 655 ** 656 ** Side Effects: 657 ** The work request is satisfied if possible. 658 */ 659 660 dowork(w, e) 661 register WORK *w; 662 register ENVELOPE *e; 663 { 664 register int i; 665 extern bool shouldqueue(); 666 extern bool readqf(); 667 668 if (tTd(40, 1)) 669 printf("dowork: %s pri %ld\n", w->w_name, w->w_pri); 670 671 /* 672 ** Ignore jobs that are too expensive for the moment. 673 */ 674 675 if (shouldqueue(w->w_pri)) 676 { 677 if (Verbose) 678 printf("\nSkipping %s\n", w->w_name + 2); 679 return; 680 } 681 682 /* 683 ** Fork for work. 684 */ 685 686 if (ForkQueueRuns) 687 { 688 i = fork(); 689 if (i < 0) 690 { 691 syserr("dowork: cannot fork"); 692 return; 693 } 694 } 695 else 696 { 697 i = 0; 698 } 699 700 if (i == 0) 701 { 702 /* 703 ** CHILD 704 ** Lock the control file to avoid duplicate deliveries. 705 ** Then run the file as though we had just read it. 706 ** We save an idea of the temporary name so we 707 ** can recover on interrupt. 708 */ 709 710 /* set basic modes, etc. */ 711 (void) alarm(0); 712 clearenvelope(e, FALSE); 713 QueueRun = TRUE; 714 ErrorMode = EM_MAIL; 715 e->e_id = &w->w_name[2]; 716 # ifdef LOG 717 if (LogLevel > 11) 718 syslog(LOG_DEBUG, "%s: dowork, pid=%d", e->e_id, 719 getpid()); 720 # endif LOG 721 722 /* don't use the headers from sendmail.cf... */ 723 e->e_header = NULL; 724 725 /* read the queue control file -- return if locked */ 726 if (!readqf(e)) 727 { 728 if (ForkQueueRuns) 729 exit(EX_OK); 730 else 731 return; 732 } 733 734 e->e_flags |= EF_INQUEUE; 735 eatheader(e); 736 737 /* do the delivery */ 738 if (!bitset(EF_FATALERRS, e->e_flags)) 739 sendall(e, SM_DELIVER); 740 741 /* finish up and exit */ 742 if (ForkQueueRuns) 743 finis(); 744 else 745 dropenvelope(e); 746 } 747 else 748 { 749 /* 750 ** Parent -- pick up results. 751 */ 752 753 errno = 0; 754 (void) waitfor(i); 755 } 756 } 757 /* 758 ** READQF -- read queue file and set up environment. 759 ** 760 ** Parameters: 761 ** e -- the envelope of the job to run. 762 ** 763 ** Returns: 764 ** TRUE if it successfully read the queue file. 765 ** FALSE otherwise. 766 ** 767 ** Side Effects: 768 ** The queue file is returned locked. 769 */ 770 771 bool 772 readqf(e) 773 register ENVELOPE *e; 774 { 775 char *qf; 776 register FILE *qfp; 777 ADDRESS *ctladdr; 778 char buf[MAXFIELD]; 779 extern char *fgetfolded(); 780 extern long atol(); 781 extern ADDRESS *setctluser(); 782 # ifdef LOCKF 783 struct flock lfd; 784 # endif 785 786 /* 787 ** Read and process the file. 788 */ 789 790 qf = queuename(e, 'q'); 791 qfp = fopen(qf, "r+"); 792 if (qfp == NULL) 793 { 794 if (errno != ENOENT) 795 syserr("readqf: no control file %s", qf); 796 return FALSE; 797 } 798 799 # ifdef LOCKF 800 lfd.l_type = F_WRLCK; 801 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 802 if (fcntl(fileno(qfp), F_SETLK, &lfd) < 0) 803 # else 804 if (flock(fileno(qfp), LOCK_EX|LOCK_NB) < 0) 805 # endif 806 { 807 /* being processed by another queuer */ 808 if (Verbose) 809 printf("%s: locked\n", e->e_id); 810 # ifdef LOG 811 if (LogLevel > 9) 812 syslog(LOG_DEBUG, "%s: locked", e->e_id); 813 # endif LOG 814 (void) fclose(qfp); 815 return FALSE; 816 } 817 818 /* save this lock */ 819 e->e_lockfp = qfp; 820 821 /* do basic system initialization */ 822 initsys(e); 823 824 FileName = qf; 825 LineNumber = 0; 826 if (Verbose) 827 printf("\nRunning %s\n", e->e_id); 828 ctladdr = NULL; 829 while (fgetfolded(buf, sizeof buf, qfp) != NULL) 830 { 831 if (tTd(40, 4)) 832 printf("+++++ %s\n", buf); 833 switch (buf[0]) 834 { 835 case 'C': /* specify controlling user */ 836 ctladdr = setctluser(&buf[1]); 837 break; 838 839 case 'R': /* specify recipient */ 840 sendtolist(&buf[1], ctladdr, &e->e_sendqueue, e); 841 break; 842 843 case 'E': /* specify error recipient */ 844 sendtolist(&buf[1], ctladdr, &e->e_errorqueue, e); 845 break; 846 847 case 'H': /* header */ 848 (void) chompheader(&buf[1], FALSE, e); 849 break; 850 851 case 'M': /* message */ 852 e->e_message = newstr(&buf[1]); 853 break; 854 855 case 'S': /* sender */ 856 setsender(newstr(&buf[1]), e); 857 break; 858 859 case 'D': /* data file name */ 860 e->e_df = newstr(&buf[1]); 861 e->e_dfp = fopen(e->e_df, "r"); 862 if (e->e_dfp == NULL) 863 syserr("readqf: cannot open %s", e->e_df); 864 break; 865 866 case 'T': /* init time */ 867 e->e_ctime = atol(&buf[1]); 868 break; 869 870 case 'P': /* message priority */ 871 e->e_msgpriority = atol(&buf[1]) + WkTimeFact; 872 break; 873 874 case '$': /* define macro */ 875 define(buf[1], newstr(&buf[2]), e); 876 break; 877 878 case '\0': /* blank line; ignore */ 879 break; 880 881 default: 882 syserr("readqf(%s:%d): bad line \"%s\"", e->e_id, 883 LineNumber, buf); 884 break; 885 } 886 } 887 888 FileName = NULL; 889 890 /* 891 ** If we haven't read any lines, this queue file is empty. 892 ** Arrange to remove it without referencing any null pointers. 893 */ 894 895 if (LineNumber == 0) 896 { 897 errno = 0; 898 e->e_flags |= EF_CLRQUEUE | EF_FATALERRS | EF_RESPONSE; 899 } 900 return TRUE; 901 } 902 /* 903 ** PRINTQUEUE -- print out a representation of the mail queue 904 ** 905 ** Parameters: 906 ** none. 907 ** 908 ** Returns: 909 ** none. 910 ** 911 ** Side Effects: 912 ** Prints a listing of the mail queue on the standard output. 913 */ 914 915 printqueue() 916 { 917 register WORK *w; 918 FILE *f; 919 int nrequests; 920 char buf[MAXLINE]; 921 922 /* 923 ** Read and order the queue. 924 */ 925 926 nrequests = orderq(TRUE); 927 928 /* 929 ** Print the work list that we have read. 930 */ 931 932 /* first see if there is anything */ 933 if (nrequests <= 0) 934 { 935 printf("Mail queue is empty\n"); 936 return; 937 } 938 939 CurrentLA = getla(); /* get load average */ 940 941 printf("\t\tMail Queue (%d request%s", nrequests, nrequests == 1 ? "" : "s"); 942 if (nrequests > QUEUESIZE) 943 printf(", only %d printed", QUEUESIZE); 944 if (Verbose) 945 printf(")\n--QID-- --Size-- -Priority- ---Q-Time--- -----------Sender/Recipient-----------\n"); 946 else 947 printf(")\n--QID-- --Size-- -----Q-Time----- ------------Sender/Recipient------------\n"); 948 for (w = WorkQ; w != NULL; w = w->w_next) 949 { 950 struct stat st; 951 auto time_t submittime = 0; 952 long dfsize = -1; 953 char message[MAXLINE]; 954 # ifdef LOCKF 955 struct flock lfd; 956 # endif 957 extern bool shouldqueue(); 958 959 f = fopen(w->w_name, "r"); 960 if (f == NULL) 961 { 962 errno = 0; 963 continue; 964 } 965 printf("%7s", w->w_name + 2); 966 # ifdef LOCKF 967 lfd.l_type = F_RDLCK; 968 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 969 if (fcntl(fileno(f), F_GETLK, &lfd) < 0 || lfd.l_type != F_UNLCK) 970 # else 971 if (flock(fileno(f), LOCK_SH|LOCK_NB) < 0) 972 # endif 973 printf("*"); 974 else if (shouldqueue(w->w_pri)) 975 printf("X"); 976 else 977 printf(" "); 978 errno = 0; 979 980 message[0] = '\0'; 981 while (fgets(buf, sizeof buf, f) != NULL) 982 { 983 register int i; 984 985 fixcrlf(buf, TRUE); 986 switch (buf[0]) 987 { 988 case 'M': /* error message */ 989 if ((i = strlen(&buf[1])) >= sizeof message) 990 i = sizeof message; 991 bcopy(&buf[1], message, i); 992 message[i] = '\0'; 993 break; 994 995 case 'S': /* sender name */ 996 if (Verbose) 997 printf("%8ld %10ld %.12s %.38s", dfsize, 998 w->w_pri, ctime(&submittime) + 4, 999 &buf[1]); 1000 else 1001 printf("%8ld %.16s %.45s", dfsize, 1002 ctime(&submittime), &buf[1]); 1003 if (message[0] != '\0') 1004 printf("\n\t\t (%.60s)", message); 1005 break; 1006 1007 case 'C': /* controlling user */ 1008 if (Verbose) 1009 printf("\n\t\t\t\t (---%.34s---)", &buf[1]); 1010 break; 1011 1012 case 'R': /* recipient name */ 1013 if (Verbose) 1014 printf("\n\t\t\t\t\t %.38s", &buf[1]); 1015 else 1016 printf("\n\t\t\t\t %.45s", &buf[1]); 1017 break; 1018 1019 case 'T': /* creation time */ 1020 submittime = atol(&buf[1]); 1021 break; 1022 1023 case 'D': /* data file name */ 1024 if (stat(&buf[1], &st) >= 0) 1025 dfsize = st.st_size; 1026 break; 1027 } 1028 } 1029 if (submittime == (time_t) 0) 1030 printf(" (no control file)"); 1031 printf("\n"); 1032 (void) fclose(f); 1033 } 1034 } 1035 1036 # endif QUEUE 1037 /* 1038 ** QUEUENAME -- build a file name in the queue directory for this envelope. 1039 ** 1040 ** Assigns an id code if one does not already exist. 1041 ** This code is very careful to avoid trashing existing files 1042 ** under any circumstances. 1043 ** 1044 ** Parameters: 1045 ** e -- envelope to build it in/from. 1046 ** type -- the file type, used as the first character 1047 ** of the file name. 1048 ** 1049 ** Returns: 1050 ** a pointer to the new file name (in a static buffer). 1051 ** 1052 ** Side Effects: 1053 ** If no id code is already assigned, queuename will 1054 ** assign an id code, create a qf file, and leave a 1055 ** locked, open-for-write file pointer in the envelope. 1056 */ 1057 1058 char * 1059 queuename(e, type) 1060 register ENVELOPE *e; 1061 char type; 1062 { 1063 static char buf[MAXNAME]; 1064 static int pid = -1; 1065 char c1 = 'A'; 1066 char c2 = 'A'; 1067 1068 if (e->e_id == NULL) 1069 { 1070 char qf[20]; 1071 1072 /* find a unique id */ 1073 if (pid != getpid()) 1074 { 1075 /* new process -- start back at "AA" */ 1076 pid = getpid(); 1077 c1 = 'A'; 1078 c2 = 'A' - 1; 1079 } 1080 (void) sprintf(qf, "qfAA%05d", pid); 1081 1082 while (c1 < '~' || c2 < 'Z') 1083 { 1084 int i; 1085 # ifdef LOCKF 1086 struct flock lfd; 1087 # endif 1088 1089 if (c2 >= 'Z') 1090 { 1091 c1++; 1092 c2 = 'A' - 1; 1093 } 1094 qf[2] = c1; 1095 qf[3] = ++c2; 1096 if (tTd(7, 20)) 1097 printf("queuename: trying \"%s\"\n", qf); 1098 1099 i = open(qf, O_WRONLY|O_CREAT|O_EXCL, FileMode); 1100 if (i < 0) 1101 { 1102 if (errno == EEXIST) 1103 continue; 1104 syserr("queuename: Cannot create \"%s\" in \"%s\"", 1105 qf, QueueDir); 1106 exit(EX_UNAVAILABLE); 1107 } 1108 # ifdef LOCKF 1109 lfd.l_type = F_WRLCK; 1110 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1111 if (fcntl(i, F_SETLK, &lfd) >= 0) 1112 # else 1113 if (flock(i, LOCK_EX|LOCK_NB) >= 0) 1114 # endif 1115 { 1116 e->e_lockfp = fdopen(i, "w"); 1117 break; 1118 } 1119 1120 /* a reader got the file; abandon it and try again */ 1121 (void) close(i); 1122 } 1123 if (c1 >= '~' && c2 >= 'Z') 1124 { 1125 syserr("queuename: Cannot create \"%s\" in \"%s\"", 1126 qf, QueueDir); 1127 exit(EX_OSERR); 1128 } 1129 e->e_id = newstr(&qf[2]); 1130 define('i', e->e_id, e); 1131 if (tTd(7, 1)) 1132 printf("queuename: assigned id %s, env=%x\n", e->e_id, e); 1133 # ifdef LOG 1134 if (LogLevel > 16) 1135 syslog(LOG_DEBUG, "%s: assigned id", e->e_id); 1136 # endif LOG 1137 } 1138 1139 if (type == '\0') 1140 return (NULL); 1141 (void) sprintf(buf, "%cf%s", type, e->e_id); 1142 if (tTd(7, 2)) 1143 printf("queuename: %s\n", buf); 1144 return (buf); 1145 } 1146 /* 1147 ** UNLOCKQUEUE -- unlock the queue entry for a specified envelope 1148 ** 1149 ** Parameters: 1150 ** e -- the envelope to unlock. 1151 ** 1152 ** Returns: 1153 ** none 1154 ** 1155 ** Side Effects: 1156 ** unlocks the queue for `e'. 1157 */ 1158 1159 unlockqueue(e) 1160 ENVELOPE *e; 1161 { 1162 /* if there is a lock file in the envelope, close it */ 1163 if (e->e_lockfp != NULL) 1164 fclose(e->e_lockfp); 1165 e->e_lockfp = NULL; 1166 1167 /* remove the transcript */ 1168 # ifdef LOG 1169 if (LogLevel > 19) 1170 syslog(LOG_DEBUG, "%s: unlock", e->e_id); 1171 # endif LOG 1172 if (!tTd(51, 4)) 1173 xunlink(queuename(e, 'x')); 1174 1175 } 1176 /* 1177 ** SETCTLUSER -- create a controlling address 1178 ** 1179 ** Create a fake "address" given only a local login name; this is 1180 ** used as a "controlling user" for future recipient addresses. 1181 ** 1182 ** Parameters: 1183 ** user -- the user name of the controlling user. 1184 ** 1185 ** Returns: 1186 ** An address descriptor for the controlling user. 1187 ** 1188 ** Side Effects: 1189 ** none. 1190 */ 1191 1192 ADDRESS * 1193 setctluser(user) 1194 char *user; 1195 { 1196 register ADDRESS *a; 1197 struct passwd *pw; 1198 1199 /* 1200 ** See if this clears our concept of controlling user. 1201 */ 1202 1203 if (user == NULL || *user == '\0') 1204 return NULL; 1205 1206 /* 1207 ** Set up addr fields for controlling user. 1208 */ 1209 1210 a = (ADDRESS *) xalloc(sizeof *a); 1211 bzero((char *) a, sizeof *a); 1212 if ((pw = getpwnam(user)) != NULL) 1213 { 1214 a->q_home = newstr(pw->pw_dir); 1215 a->q_uid = pw->pw_uid; 1216 a->q_gid = pw->pw_gid; 1217 a->q_ruser = newstr(user); 1218 } 1219 else 1220 { 1221 a->q_uid = DefUid; 1222 a->q_gid = DefGid; 1223 a->q_ruser = newstr(DefUser); 1224 } 1225 1226 a->q_flags |= QGOODUID; /* flag as a "ctladdr" */ 1227 return a; 1228 } 1229