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 3.40 08/27/82 (no queueing)); 9 # else QUEUE 10 11 SCCSID(@(#)queue.c 3.40 08/27/82); 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 runqueue(forkflag) 186 bool forkflag; 187 { 188 register int i; 189 190 /* 191 ** See if we want to go off and do other useful work. 192 */ 193 194 if (forkflag) 195 { 196 int pid; 197 198 pid = dofork(); 199 if (pid != 0) 200 { 201 /* parent -- pick up intermediate zombie */ 202 do 203 { 204 auto int stat; 205 206 i = wait(&stat); 207 } while (i >= 0 && i != pid); 208 if (QueueIntvl != 0) 209 setevent(QueueIntvl, runqueue, TRUE); 210 return; 211 } 212 /* child -- double fork */ 213 if (fork() != 0) 214 exit(EX_OK); 215 } 216 # ifdef LOG 217 if (LogLevel > 11) 218 syslog(LOG_DEBUG, "runqueue %s, pid=%d", QueueDir, getpid()); 219 # endif LOG 220 221 /* 222 ** Start making passes through the queue. 223 ** First, read and sort the entire queue. 224 ** Then, process the work in that order. 225 ** But if you take too long, start over. 226 */ 227 228 /* order the existing work requests */ 229 orderq(); 230 231 /* process them once at a time */ 232 while (WorkQ != NULL) 233 { 234 WORK *w = WorkQ; 235 236 WorkQ = WorkQ->w_next; 237 dowork(w); 238 free(w->w_name); 239 free((char *) w); 240 } 241 finis(); 242 } 243 /* 244 ** ORDERQ -- order the work queue. 245 ** 246 ** Parameters: 247 ** none. 248 ** 249 ** Returns: 250 ** none. 251 ** 252 ** Side Effects: 253 ** Sets WorkQ to the queue of available work, in order. 254 */ 255 256 # define WLSIZE 120 /* max size of worklist per sort */ 257 258 orderq() 259 { 260 register struct direct *d; 261 register WORK *w; 262 register WORK **wp; /* parent of w */ 263 DIR *f; 264 register int i; 265 WORK wlist[WLSIZE]; 266 int wn = 0; 267 extern workcmpf(); 268 extern char *QueueDir; 269 270 /* clear out old WorkQ */ 271 for (w = WorkQ; w != NULL; ) 272 { 273 register WORK *nw = w->w_next; 274 275 WorkQ = nw; 276 free(w->w_name); 277 free((char *) w); 278 w = nw; 279 } 280 281 /* open the queue directory */ 282 f = opendir(QueueDir); 283 if (f == NULL) 284 { 285 syserr("orderq: cannot open %s", QueueDir); 286 return; 287 } 288 289 /* 290 ** Read the work directory. 291 */ 292 293 while (wn < WLSIZE && (d = readdir(f)) != NULL) 294 { 295 char cbuf[MAXNAME]; 296 char lbuf[MAXNAME]; 297 FILE *cf; 298 register char *p; 299 300 /* is this an interesting entry? */ 301 if (d->d_name[0] != 'q' || d->d_name[1] != 'f') 302 continue; 303 304 /* yes -- find the control file location */ 305 (void) strcpy(cbuf, QueueDir); 306 (void) strcat(cbuf, "/"); 307 p = &cbuf[strlen(cbuf)]; 308 (void) strcpy(p, d->d_name); 309 310 /* open control file */ 311 cf = fopen(cbuf, "r"); 312 if (cf == NULL) 313 { 314 /* this may be some random person sending hir msgs */ 315 /* syserr("orderq: cannot open %s", cbuf); */ 316 errno = 0; 317 continue; 318 } 319 wlist[wn].w_name = newstr(cbuf); 320 321 /* extract useful information */ 322 while (fgets(lbuf, sizeof lbuf, cf) != NULL) 323 { 324 fixcrlf(lbuf, TRUE); 325 326 switch (lbuf[0]) 327 { 328 case 'P': /* message priority */ 329 (void) sscanf(&lbuf[1], "%ld", &wlist[wn].w_pri); 330 break; 331 } 332 } 333 wn++; 334 (void) fclose(cf); 335 } 336 (void) closedir(f); 337 338 /* 339 ** Sort the work directory. 340 */ 341 342 qsort(wlist, wn, sizeof *wlist, workcmpf); 343 344 /* 345 ** Convert the work list into canonical form. 346 */ 347 348 wp = &WorkQ; 349 for (i = 0; i < wn; i++) 350 { 351 w = (WORK *) xalloc(sizeof *w); 352 w->w_name = wlist[i].w_name; 353 w->w_pri = wlist[i].w_pri; 354 w->w_next = NULL; 355 *wp = w; 356 wp = &w->w_next; 357 } 358 359 # ifdef DEBUG 360 if (tTd(40, 1)) 361 { 362 for (w = WorkQ; w != NULL; w = w->w_next) 363 printf("%32s: pri=%ld\n", w->w_name, w->w_pri); 364 } 365 # endif DEBUG 366 } 367 /* 368 ** WORKCMPF -- compare function for ordering work. 369 ** 370 ** Parameters: 371 ** a -- the first argument. 372 ** b -- the second argument. 373 ** 374 ** Returns: 375 ** -1 if a < b 376 ** 0 if a == b 377 ** 1 if a > b 378 ** 379 ** Side Effects: 380 ** none. 381 */ 382 383 # define PRIFACT 1800 /* bytes each priority point is worth */ 384 385 workcmpf(a, b) 386 register WORK *a; 387 register WORK *b; 388 { 389 if (a->w_pri == b->w_pri) 390 return (0); 391 else if (a->w_pri > b->w_pri) 392 return (1); 393 else 394 return (-1); 395 } 396 /* 397 ** DOWORK -- do a work request. 398 ** 399 ** Parameters: 400 ** w -- the work request to be satisfied. 401 ** 402 ** Returns: 403 ** none. 404 ** 405 ** Side Effects: 406 ** The work request is satisfied if possible. 407 */ 408 409 dowork(w) 410 register WORK *w; 411 { 412 register int i; 413 auto int xstat; 414 415 # ifdef DEBUG 416 if (tTd(40, 1)) 417 printf("dowork: %s pri %ld\n", w->w_name, w->w_pri); 418 # endif DEBUG 419 420 /* 421 ** Fork for work. 422 */ 423 424 i = fork(); 425 if (i < 0) 426 { 427 syserr("dowork: cannot fork"); 428 return; 429 } 430 431 if (i == 0) 432 { 433 char buf[MAXNAME]; 434 435 /* 436 ** CHILD 437 ** Change the name of the control file to avoid 438 ** duplicate deliveries. Then run the file 439 ** as though we had just read it. 440 ** We save an idea of the temporary name so we 441 ** can recover on interrupt. 442 */ 443 444 /* set basic modes, etc. */ 445 (void) alarm(0); 446 FatalErrors = FALSE; 447 QueueRun = TRUE; 448 MailBack = TRUE; 449 CurEnv->e_qf = w->w_name; 450 CurEnv->e_id = &w->w_name[strlen(QueueDir) + 3]; 451 # ifdef LOG 452 if (LogLevel > 11) 453 syslog(LOG_DEBUG, "%s: dowork, pid=%d", CurEnv->e_id, 454 getpid()); 455 # endif LOG 456 457 /* don't use the headers from sendmail.cf... */ 458 CurEnv->e_header = NULL; 459 chompheader("from: $q", TRUE); 460 461 /* create the link to the control file during processing */ 462 if (link(w->w_name, queuename(CurEnv, 'l')) < 0) 463 { 464 /* being processed by another queuer */ 465 # ifdef LOG 466 if (LogLevel > 4) 467 syslog(LOG_DEBUG, "%s: locked", CurEnv->e_id); 468 # endif LOG 469 exit(EX_OK); 470 } 471 472 /* create ourselves a transcript file */ 473 openxscrpt(); 474 475 /* do basic system initialization */ 476 initsys(); 477 478 /* read the queue control file */ 479 readqf(CurEnv->e_qf); 480 eatheader(); 481 482 /* do the delivery */ 483 if (!FatalErrors) 484 sendall(CurEnv, FALSE); 485 486 /* if still not sent, perhaps we should time out.... */ 487 # ifdef DEBUG 488 if (tTd(40, 3)) 489 printf("curtime=%ld, TimeOut=%ld\n", curtime(), 490 CurEnv->e_ctime + TimeOut); 491 # endif DEBUG 492 if (CurEnv->e_queueup && curtime() > CurEnv->e_ctime + TimeOut) 493 timeout(w); 494 495 /* finish up and exit */ 496 finis(); 497 } 498 499 /* 500 ** Parent -- pick up results. 501 */ 502 503 errno = 0; 504 while ((i = wait(&xstat)) > 0 && errno != EINTR) 505 { 506 if (errno == EINTR) 507 { 508 errno = 0; 509 } 510 } 511 } 512 /* 513 ** READQF -- read queue file and set up environment. 514 ** 515 ** Parameters: 516 ** cf -- name of queue control file. 517 ** 518 ** Returns: 519 ** none. 520 ** 521 ** Side Effects: 522 ** cf is read and created as the current job, as though 523 ** we had been invoked by argument. 524 */ 525 526 readqf(cf) 527 char *cf; 528 { 529 register FILE *f; 530 char buf[MAXFIELD]; 531 register char *p; 532 register int i; 533 534 /* 535 ** Open the file created by queueup. 536 */ 537 538 f = fopen(cf, "r"); 539 if (f == NULL) 540 { 541 syserr("readqf: no cf file %s", cf); 542 return; 543 } 544 545 /* 546 ** Read and process the file. 547 */ 548 549 if (Verbose) 550 printf("\nRunning %s\n", cf); 551 while (fgetfolded(buf, sizeof buf, f) != NULL) 552 { 553 switch (buf[0]) 554 { 555 case 'R': /* specify recipient */ 556 sendto(&buf[1], 1, (ADDRESS *) NULL, &CurEnv->e_sendqueue); 557 break; 558 559 case 'H': /* header */ 560 (void) chompheader(&buf[1], FALSE); 561 break; 562 563 case 'S': /* sender */ 564 setsender(newstr(&buf[1])); 565 break; 566 567 case 'D': /* data file name */ 568 CurEnv->e_df = newstr(&buf[1]); 569 TempFile = fopen(CurEnv->e_df, "r"); 570 if (TempFile == NULL) 571 syserr("readqf: cannot open %s", CurEnv->e_df); 572 break; 573 574 case 'T': /* init time */ 575 (void) sscanf(&buf[1], "%ld", &CurEnv->e_ctime); 576 break; 577 578 case 'P': /* message priority */ 579 (void) sscanf(&buf[1], "%ld", &CurEnv->e_msgpriority); 580 581 /* make sure that big things get sent eventually */ 582 CurEnv->e_msgpriority -= WKTIMEFACT; 583 break; 584 585 case 'C': /* message class */ 586 (void) sscanf(&buf[1], "%hd", &CurEnv->e_class); 587 break; 588 589 case 'M': /* define macro */ 590 define(buf[1], newstr(&buf[2])); 591 break; 592 593 default: 594 syserr("readqf(%s): bad line \"%s\"", cf, buf); 595 break; 596 } 597 } 598 } 599 /* 600 ** TIMEOUT -- process timeout on queue file. 601 ** 602 ** Parameters: 603 ** w -- pointer to work request that timed out. 604 ** 605 ** Returns: 606 ** none. 607 ** 608 ** Side Effects: 609 ** Returns a message to the sender saying that this 610 ** message has timed out. 611 */ 612 613 timeout(w) 614 register WORK *w; 615 { 616 char buf[MAXLINE]; 617 extern char *pintvl(); 618 619 # ifdef DEBUG 620 if (tTd(40, 3)) 621 printf("timeout(%s)\n", w->w_name); 622 # endif DEBUG 623 message(Arpa_Info, "Message has timed out"); 624 625 /* return message to sender */ 626 (void) sprintf(buf, "Cannot send mail for %s", pintvl(TimeOut, FALSE)); 627 (void) returntosender(buf, &CurEnv->e_from, TRUE); 628 629 /* arrange to remove files from queue */ 630 CurEnv->e_dontqueue = TRUE; 631 } 632 633 # endif QUEUE 634