1 # include "sendmail.h" 2 # include <sys/stat.h> 3 # include <ndir.h> 4 # include <signal.h> 5 # include <errno.h> 6 7 # ifndef QUEUE 8 SCCSID(@(#)queue.c 3.39 08/25/82 (no queueing)); 9 # else QUEUE 10 11 SCCSID(@(#)queue.c 3.39 08/25/82); 12 13 /* 14 ** QUEUEUP -- queue a message up for future transmission. 15 ** 16 ** The queued message should already be in the correct place. 17 ** This routine just outputs the control file as appropriate. 18 ** 19 ** Parameters: 20 ** e -- the envelope to queue up. 21 ** queueall -- if TRUE, queue all addresses, rather than 22 ** just those with the QQUEUEUP flag set. 23 ** 24 ** Returns: 25 ** none. 26 ** 27 ** Side Effects: 28 ** The current request (only unsatisfied addresses) 29 ** are saved in a control file. 30 */ 31 32 queueup(e, queueall) 33 register ENVELOPE *e; 34 bool queueall; 35 { 36 char *tf; 37 char *qf; 38 char buf[MAXLINE]; 39 register FILE *tfp; 40 register HDR *h; 41 register ADDRESS *q; 42 register int i; 43 44 /* 45 ** Create control file. 46 */ 47 48 tf = newstr(queuename(e, 't')); 49 tfp = fopen(tf, "w"); 50 if (tfp == NULL) 51 { 52 syserr("queueup: cannot create temp file %s", tf); 53 return; 54 } 55 (void) chmod(tf, 0600); 56 57 # ifdef DEBUG 58 if (tTd(40, 1)) 59 printf("queueing in %s\n", tf); 60 # endif DEBUG 61 62 /* 63 ** If there is no data file yet, create one. 64 */ 65 66 if (e->e_df == NULL) 67 { 68 register FILE *dfp; 69 70 e->e_df = newstr(queuename(e, 'd')); 71 dfp = fopen(e->e_df, "w"); 72 if (dfp == NULL) 73 { 74 syserr("queueup: cannot create %s", e->e_df); 75 (void) fclose(tfp); 76 return; 77 } 78 (void) chmod(e->e_df, 0600); 79 (*e->e_putbody)(dfp, Mailer[1], FALSE); 80 (void) fclose(dfp); 81 } 82 83 /* 84 ** Output future work requests. 85 */ 86 87 /* output name of data file */ 88 fprintf(tfp, "D%s\n", e->e_df); 89 90 /* output name of sender */ 91 fprintf(tfp, "S%s\n", e->e_from.q_paddr); 92 93 /* output creation time */ 94 fprintf(tfp, "T%ld\n", e->e_ctime); 95 96 /* output message priority */ 97 fprintf(tfp, "P%ld\n", e->e_msgpriority); 98 99 /* output message class */ 100 fprintf(tfp, "C%d\n", e->e_class); 101 102 /* output macro definitions */ 103 /* I don't think this is needed any more..... 104 for (i = 0; i < 128; i++) 105 { 106 register char *p = e->e_macro[i]; 107 108 if (p != NULL && i != (int) 'b') 109 fprintf(tfp, "M%c%s\n", i, p); 110 } 111 ..... */ 112 113 /* output list of recipient addresses */ 114 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 115 { 116 # ifdef DEBUG 117 if (tTd(40, 1)) 118 { 119 printf("queueing "); 120 printaddr(q, FALSE); 121 } 122 # endif DEBUG 123 if (queueall ? !bitset(QDONTSEND, q->q_flags) : 124 bitset(QQUEUEUP, q->q_flags)) 125 fprintf(tfp, "R%s\n", q->q_paddr); 126 } 127 128 /* output headers for this message */ 129 define('g', "$f"); 130 for (h = e->e_header; h != NULL; h = h->h_link) 131 { 132 if (h->h_value == NULL || h->h_value[0] == '\0') 133 continue; 134 fprintf(tfp, "H"); 135 if (h->h_mflags != 0 && bitset(H_CHECK|H_ACHECK, h->h_flags)) 136 mfdecode(h->h_mflags, tfp); 137 fprintf(tfp, "%s: ", h->h_field); 138 if (bitset(H_DEFAULT, h->h_flags)) 139 { 140 (void) expand(h->h_value, buf, &buf[sizeof buf], e); 141 fprintf(tfp, "%s\n", buf); 142 } 143 else 144 fprintf(tfp, "%s\n", h->h_value); 145 } 146 147 /* 148 ** Clean up. 149 */ 150 151 (void) fclose(tfp); 152 qf = queuename(e, 'q'); 153 (void) unlink(qf); 154 if (link(tf, qf) < 0) 155 syserr("cannot link(%s, %s), df=%s", tf, qf, e->e_df); 156 else 157 (void) unlink(tf); 158 e->e_qf = NULL; 159 160 # ifdef LOG 161 /* save log info */ 162 if (LogLevel > 15) 163 syslog(LOG_DEBUG, "%s: queueup, qf=%s, df=%s\n", e->e_id, qf, e->e_df); 164 # endif LOG 165 166 /* disconnect this temp file from the job */ 167 e->e_df = NULL; 168 } 169 /* 170 ** RUNQUEUE -- run the jobs in the queue. 171 ** 172 ** Gets the stuff out of the queue in some presumably logical 173 ** order and processes them. 174 ** 175 ** Parameters: 176 ** none. 177 ** 178 ** Returns: 179 ** none. 180 ** 181 ** Side Effects: 182 ** runs things in the mail queue. 183 */ 184 185 bool ReorderQueue; /* if set, reorder the send queue */ 186 int QueuePid; /* pid of child running queue */ 187 188 runqueue(forkflag) 189 bool forkflag; 190 { 191 extern reordersig(); 192 193 /* 194 ** See if we want to go off and do other useful work. 195 */ 196 197 if (forkflag) 198 { 199 QueuePid = dofork(); 200 if (QueuePid > 0) 201 { 202 /* parent */ 203 if (QueueIntvl != 0) 204 setevent(QueueIntvl, reordersig, TRUE); 205 return; 206 } 207 } 208 # ifdef LOG 209 if (LogLevel > 11) 210 syslog(LOG_DEBUG, "runqueue, pid=%d", getpid()); 211 # endif LOG 212 213 /* 214 ** Start making passes through the queue. 215 ** First, read and sort the entire queue. 216 ** Then, process the work in that order. 217 ** But if you take too long, start over. 218 ** There is a race condition at the end -- we could get 219 ** a reorder signal after finishing the queue. 220 ** In this case we will hang for one more queue 221 ** interval -- clearly a botch, but rare and 222 ** relatively innocuous. 223 */ 224 225 for (;;) 226 { 227 /* order the existing work requests */ 228 orderq(); 229 230 /* arrange to reorder later */ 231 ReorderQueue = FALSE; 232 if (QueueIntvl != 0) 233 setevent(QueueIntvl, reordersig, FALSE); 234 235 /* process them once at a time */ 236 while (WorkQ != NULL) 237 { 238 WORK *w = WorkQ; 239 240 WorkQ = WorkQ->w_next; 241 dowork(w); 242 free(w->w_name); 243 free((char *) w); 244 if (ReorderQueue) 245 break; 246 } 247 248 /* if we are just doing one pass, then we are done */ 249 if (QueueIntvl == 0) 250 finis(); 251 252 /* wait for work -- note (harmless) race condition here */ 253 while (!ReorderQueue) 254 { 255 if (forkflag) 256 finis(); 257 pause(); 258 } 259 } 260 } 261 /* 262 ** REORDERSIG -- catch the reorder signal and tell sendmail to reorder queue. 263 ** 264 ** Parameters: 265 ** parent -- if set, called from parent (i.e., not 266 ** really doing the work). 267 ** 268 ** Returns: 269 ** none. 270 ** 271 ** Side Effects: 272 ** sets the "reorder work queue" flag. 273 */ 274 275 reordersig(parent) 276 bool parent; 277 { 278 if (!parent) 279 { 280 /* we are in a child doing queueing */ 281 ReorderQueue = TRUE; 282 283 /* arrange to get this signal again */ 284 setevent(QueueIntvl, reordersig, FALSE); 285 } 286 else 287 { 288 /* 289 ** In parent. If the child still exists, we want 290 ** to do nothing. If the child is gone, we will 291 ** start up a new one. 292 ** If the child exists, it is responsible for 293 ** doing a queue reorder. 294 ** This code really sucks. 295 */ 296 297 if (kill(QueuePid, SIGALRM) < 0) 298 { 299 /* no child -- get zombie & start new one */ 300 static int st; 301 302 (void) wait(&st); 303 runqueue(TRUE); 304 } 305 else 306 setevent(QueueIntvl, reordersig, TRUE); 307 } 308 } 309 /* 310 ** ORDERQ -- order the work queue. 311 ** 312 ** Parameters: 313 ** none. 314 ** 315 ** Returns: 316 ** none. 317 ** 318 ** Side Effects: 319 ** Sets WorkQ to the queue of available work, in order. 320 */ 321 322 # define WLSIZE 120 /* max size of worklist per sort */ 323 324 orderq() 325 { 326 register struct direct *d; 327 register WORK *w; 328 register WORK **wp; /* parent of w */ 329 DIR *f; 330 register int i; 331 WORK wlist[WLSIZE]; 332 int wn = 0; 333 extern workcmpf(); 334 extern char *QueueDir; 335 336 /* clear out old WorkQ */ 337 for (w = WorkQ; w != NULL; ) 338 { 339 register WORK *nw = w->w_next; 340 341 WorkQ = nw; 342 free(w->w_name); 343 free((char *) w); 344 w = nw; 345 } 346 347 /* open the queue directory */ 348 f = opendir(QueueDir); 349 if (f == NULL) 350 { 351 syserr("orderq: cannot open %s", QueueDir); 352 return; 353 } 354 355 /* 356 ** Read the work directory. 357 */ 358 359 while (wn < WLSIZE && (d = readdir(f)) != NULL) 360 { 361 char cbuf[MAXNAME]; 362 char lbuf[MAXNAME]; 363 FILE *cf; 364 register char *p; 365 366 /* is this an interesting entry? */ 367 if (d->d_name[0] != 'q' || d->d_name[1] != 'f') 368 continue; 369 370 /* yes -- find the control file location */ 371 (void) strcpy(cbuf, QueueDir); 372 (void) strcat(cbuf, "/"); 373 p = &cbuf[strlen(cbuf)]; 374 (void) strcpy(p, d->d_name); 375 376 /* open control file */ 377 cf = fopen(cbuf, "r"); 378 if (cf == NULL) 379 { 380 /* this may be some random person sending hir msgs */ 381 /* syserr("orderq: cannot open %s", cbuf); */ 382 errno = 0; 383 continue; 384 } 385 wlist[wn].w_name = newstr(cbuf); 386 387 /* extract useful information */ 388 while (fgets(lbuf, sizeof lbuf, cf) != NULL) 389 { 390 fixcrlf(lbuf, TRUE); 391 392 switch (lbuf[0]) 393 { 394 case 'P': /* message priority */ 395 (void) sscanf(&lbuf[1], "%ld", &wlist[wn].w_pri); 396 break; 397 } 398 } 399 wn++; 400 (void) fclose(cf); 401 } 402 (void) closedir(f); 403 404 /* 405 ** Sort the work directory. 406 */ 407 408 qsort(wlist, wn, sizeof *wlist, workcmpf); 409 410 /* 411 ** Convert the work list into canonical form. 412 */ 413 414 wp = &WorkQ; 415 for (i = 0; i < wn; i++) 416 { 417 w = (WORK *) xalloc(sizeof *w); 418 w->w_name = wlist[i].w_name; 419 w->w_pri = wlist[i].w_pri; 420 w->w_next = NULL; 421 *wp = w; 422 wp = &w->w_next; 423 } 424 425 # ifdef DEBUG 426 if (tTd(40, 1)) 427 { 428 for (w = WorkQ; w != NULL; w = w->w_next) 429 printf("%32s: pri=%ld\n", w->w_name, w->w_pri); 430 } 431 # endif DEBUG 432 } 433 /* 434 ** WORKCMPF -- compare function for ordering work. 435 ** 436 ** Parameters: 437 ** a -- the first argument. 438 ** b -- the second argument. 439 ** 440 ** Returns: 441 ** -1 if a < b 442 ** 0 if a == b 443 ** 1 if a > b 444 ** 445 ** Side Effects: 446 ** none. 447 */ 448 449 # define PRIFACT 1800 /* bytes each priority point is worth */ 450 451 workcmpf(a, b) 452 register WORK *a; 453 register WORK *b; 454 { 455 if (a->w_pri == b->w_pri) 456 return (0); 457 else if (a->w_pri > b->w_pri) 458 return (1); 459 else 460 return (-1); 461 } 462 /* 463 ** DOWORK -- do a work request. 464 ** 465 ** Parameters: 466 ** w -- the work request to be satisfied. 467 ** 468 ** Returns: 469 ** none. 470 ** 471 ** Side Effects: 472 ** The work request is satisfied if possible. 473 */ 474 475 dowork(w) 476 register WORK *w; 477 { 478 register int i; 479 auto int xstat; 480 481 # ifdef DEBUG 482 if (tTd(40, 1)) 483 printf("dowork: %s pri %ld\n", w->w_name, w->w_pri); 484 # endif DEBUG 485 486 /* 487 ** Fork for work. 488 */ 489 490 i = fork(); 491 if (i < 0) 492 { 493 syserr("dowork: cannot fork"); 494 return; 495 } 496 497 if (i == 0) 498 { 499 char buf[MAXNAME]; 500 501 /* 502 ** CHILD 503 ** Change the name of the control file to avoid 504 ** duplicate deliveries. Then run the file 505 ** as though we had just read it. 506 ** We save an idea of the temporary name so we 507 ** can recover on interrupt. 508 */ 509 510 /* set basic modes, etc. */ 511 (void) alarm(0); 512 FatalErrors = FALSE; 513 QueueRun = TRUE; 514 MailBack = TRUE; 515 CurEnv->e_qf = w->w_name; 516 CurEnv->e_id = &w->w_name[strlen(QueueDir) + 3]; 517 # ifdef LOG 518 if (LogLevel > 11) 519 syslog(LOG_DEBUG, "%s: dowork, pid=%d", CurEnv->e_id, 520 getpid()); 521 # endif LOG 522 523 /* don't use the headers from sendmail.cf... */ 524 CurEnv->e_header = NULL; 525 chompheader("from: $q", TRUE); 526 527 /* create the link to the control file during processing */ 528 if (link(w->w_name, queuename(CurEnv, 'l')) < 0) 529 { 530 /* being processed by another queuer */ 531 # ifdef LOG 532 if (LogLevel > 4) 533 syslog(LOG_DEBUG, "%s: locked", CurEnv->e_id); 534 # endif LOG 535 exit(EX_OK); 536 } 537 538 /* create ourselves a transcript file */ 539 openxscrpt(); 540 541 /* do basic system initialization */ 542 initsys(); 543 544 /* read the queue control file */ 545 readqf(CurEnv->e_qf); 546 eatheader(); 547 548 /* do the delivery */ 549 if (!FatalErrors) 550 sendall(CurEnv, FALSE); 551 552 /* if still not sent, perhaps we should time out.... */ 553 # ifdef DEBUG 554 if (tTd(40, 3)) 555 printf("curtime=%ld, TimeOut=%ld\n", curtime(), 556 CurEnv->e_ctime + TimeOut); 557 # endif DEBUG 558 if (CurEnv->e_queueup && curtime() > CurEnv->e_ctime + TimeOut) 559 timeout(w); 560 561 /* finish up and exit */ 562 finis(); 563 } 564 565 /* 566 ** Parent -- pick up results. 567 */ 568 569 errno = 0; 570 while ((i = wait(&xstat)) > 0 && errno != EINTR) 571 { 572 if (errno == EINTR) 573 { 574 errno = 0; 575 } 576 } 577 } 578 /* 579 ** READQF -- read queue file and set up environment. 580 ** 581 ** Parameters: 582 ** cf -- name of queue control file. 583 ** 584 ** Returns: 585 ** none. 586 ** 587 ** Side Effects: 588 ** cf is read and created as the current job, as though 589 ** we had been invoked by argument. 590 */ 591 592 readqf(cf) 593 char *cf; 594 { 595 register FILE *f; 596 char buf[MAXFIELD]; 597 register char *p; 598 register int i; 599 600 /* 601 ** Open the file created by queueup. 602 */ 603 604 f = fopen(cf, "r"); 605 if (f == NULL) 606 { 607 syserr("readqf: no cf file %s", cf); 608 return; 609 } 610 611 /* 612 ** Read and process the file. 613 */ 614 615 if (Verbose) 616 printf("\nRunning %s\n", cf); 617 while (fgetfolded(buf, sizeof buf, f) != NULL) 618 { 619 switch (buf[0]) 620 { 621 case 'R': /* specify recipient */ 622 sendto(&buf[1], 1, (ADDRESS *) NULL, &CurEnv->e_sendqueue); 623 break; 624 625 case 'H': /* header */ 626 (void) chompheader(&buf[1], FALSE); 627 break; 628 629 case 'S': /* sender */ 630 setsender(newstr(&buf[1])); 631 break; 632 633 case 'D': /* data file name */ 634 CurEnv->e_df = newstr(&buf[1]); 635 TempFile = fopen(CurEnv->e_df, "r"); 636 if (TempFile == NULL) 637 syserr("readqf: cannot open %s", CurEnv->e_df); 638 break; 639 640 case 'T': /* init time */ 641 (void) sscanf(&buf[1], "%ld", &CurEnv->e_ctime); 642 break; 643 644 case 'P': /* message priority */ 645 (void) sscanf(&buf[1], "%ld", &CurEnv->e_msgpriority); 646 647 /* make sure that big things get sent eventually */ 648 CurEnv->e_msgpriority -= WKTIMEFACT; 649 break; 650 651 case 'C': /* message class */ 652 (void) sscanf(&buf[1], "%hd", &CurEnv->e_class); 653 break; 654 655 case 'M': /* define macro */ 656 define(buf[1], newstr(&buf[2])); 657 break; 658 659 default: 660 syserr("readqf(%s): bad line \"%s\"", cf, buf); 661 break; 662 } 663 } 664 } 665 /* 666 ** TIMEOUT -- process timeout on queue file. 667 ** 668 ** Parameters: 669 ** w -- pointer to work request that timed out. 670 ** 671 ** Returns: 672 ** none. 673 ** 674 ** Side Effects: 675 ** Returns a message to the sender saying that this 676 ** message has timed out. 677 */ 678 679 timeout(w) 680 register WORK *w; 681 { 682 char buf[MAXLINE]; 683 extern char *pintvl(); 684 685 # ifdef DEBUG 686 if (tTd(40, 3)) 687 printf("timeout(%s)\n", w->w_name); 688 # endif DEBUG 689 message(Arpa_Info, "Message has timed out"); 690 691 /* return message to sender */ 692 (void) sprintf(buf, "Cannot send mail for %s", pintvl(TimeOut, FALSE)); 693 (void) returntosender(buf, &CurEnv->e_from, TRUE); 694 695 /* arrange to remove files from queue */ 696 CurEnv->e_dontqueue = TRUE; 697 } 698 699 # endif QUEUE 700