1 # include "sendmail.h" 2 # include <sys/stat.h> 3 # include <dir.h> 4 # include <signal.h> 5 # include <errno.h> 6 7 # ifndef QUEUE 8 SCCSID(@(#)queue.c 3.55 11/28/82 (no queueing)); 9 # else QUEUE 10 11 SCCSID(@(#)queue.c 3.55 11/28/82); 12 13 /* 14 ** Work queue. 15 */ 16 17 struct work 18 { 19 char *w_name; /* name of control file */ 20 long w_pri; /* priority of message, see below */ 21 struct work *w_next; /* next in queue */ 22 }; 23 24 typedef struct work WORK; 25 26 WORK *WorkQ; /* queue of things to be done */ 27 /* 28 ** QUEUEUP -- queue a message up for future transmission. 29 ** 30 ** Parameters: 31 ** e -- the envelope to queue up. 32 ** queueall -- if TRUE, queue all addresses, rather than 33 ** just those with the QQUEUEUP flag set. 34 ** announce -- if TRUE, tell when you are queueing up. 35 ** 36 ** Returns: 37 ** none. 38 ** 39 ** Side Effects: 40 ** The current request are saved in a control file. 41 */ 42 43 queueup(e, queueall, announce) 44 register ENVELOPE *e; 45 bool queueall; 46 bool announce; 47 { 48 char *tf; 49 char *qf; 50 char buf[MAXLINE]; 51 register FILE *tfp; 52 register HDR *h; 53 register ADDRESS *q; 54 55 /* 56 ** Create control file. 57 */ 58 59 tf = newstr(queuename(e, 't')); 60 tfp = fopen(tf, "w"); 61 if (tfp == NULL) 62 { 63 syserr("queueup: cannot create temp file %s", tf); 64 return; 65 } 66 (void) chmod(tf, FileMode); 67 68 # ifdef DEBUG 69 if (tTd(40, 1)) 70 printf("queueing in %s\n", tf); 71 # endif DEBUG 72 73 /* 74 ** If there is no data file yet, create one. 75 */ 76 77 if (e->e_df == NULL) 78 { 79 register FILE *dfp; 80 81 e->e_df = newstr(queuename(e, 'd')); 82 dfp = fopen(e->e_df, "w"); 83 if (dfp == NULL) 84 { 85 syserr("queueup: cannot create %s", e->e_df); 86 (void) fclose(tfp); 87 return; 88 } 89 (void) chmod(e->e_df, FileMode); 90 (*e->e_putbody)(dfp, ProgMailer, FALSE); 91 (void) fclose(dfp); 92 } 93 94 /* 95 ** Output future work requests. 96 ** Priority should be first, since it is read by orderq. 97 */ 98 99 /* output message priority */ 100 fprintf(tfp, "P%ld\n", e->e_msgpriority); 101 102 /* output name of data file */ 103 fprintf(tfp, "D%s\n", e->e_df); 104 105 /* output name of sender */ 106 fprintf(tfp, "S%s\n", e->e_from.q_paddr); 107 108 /* output creation time */ 109 fprintf(tfp, "T%ld\n", e->e_ctime); 110 111 /* output list of recipient addresses */ 112 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 113 { 114 if (queueall ? !bitset(QDONTSEND, q->q_flags) : 115 bitset(QQUEUEUP, q->q_flags)) 116 { 117 fprintf(tfp, "R%s\n", q->q_paddr); 118 if (announce) 119 { 120 e->e_to = q->q_paddr; 121 message(Arpa_Info, "queued"); 122 if (LogLevel > 4) 123 logdelivery("queued"); 124 e->e_to = NULL; 125 } 126 #ifdef DEBUG 127 if (tTd(40, 1)) 128 { 129 printf("queueing "); 130 printaddr(q, FALSE); 131 } 132 #endif DEBUG 133 } 134 } 135 136 /* 137 ** Output headers for this message. 138 ** Expand macros completely here. Queue run will deal with 139 ** everything as absolute headers. 140 ** All headers that must be relative to the recipient 141 ** can be cracked later. 142 */ 143 144 define('g', "$f", e); 145 for (h = e->e_header; h != NULL; h = h->h_link) 146 { 147 if (h->h_value == NULL || h->h_value[0] == '\0') 148 continue; 149 fprintf(tfp, "H"); 150 if (h->h_mflags != 0 && bitset(H_CHECK|H_ACHECK, h->h_flags)) 151 mfdecode(h->h_mflags, tfp); 152 if (bitset(H_DEFAULT, h->h_flags)) 153 { 154 (void) expand(h->h_value, buf, &buf[sizeof buf], e); 155 fprintf(tfp, "%s: %s\n", h->h_field, buf); 156 } 157 else if (bitset(H_FROM|H_RCPT, h->h_flags)) 158 { 159 commaize(h, h->h_value, tfp, bitset(EF_OLDSTYLE, e->e_flags), 160 (MAILER *) NULL); 161 } 162 else 163 fprintf(tfp, "%s: %s\n", h->h_field, h->h_value); 164 } 165 166 /* 167 ** Clean up. 168 */ 169 170 (void) fclose(tfp); 171 qf = queuename(e, 'q'); 172 holdsigs(); 173 (void) unlink(qf); 174 if (link(tf, qf) < 0) 175 syserr("cannot link(%s, %s), df=%s", tf, qf, e->e_df); 176 else 177 (void) unlink(tf); 178 rlsesigs(); 179 180 # ifdef LOG 181 /* save log info */ 182 if (LogLevel > 15) 183 syslog(LOG_DEBUG, "%s: queueup, qf=%s, df=%s\n", e->e_id, qf, e->e_df); 184 # endif LOG 185 } 186 /* 187 ** RUNQUEUE -- run the jobs in the queue. 188 ** 189 ** Gets the stuff out of the queue in some presumably logical 190 ** order and processes them. 191 ** 192 ** Parameters: 193 ** none. 194 ** 195 ** Returns: 196 ** none. 197 ** 198 ** Side Effects: 199 ** runs things in the mail queue. 200 */ 201 202 runqueue(forkflag) 203 bool forkflag; 204 { 205 /* 206 ** See if we want to go off and do other useful work. 207 */ 208 209 if (forkflag) 210 { 211 int pid; 212 213 pid = dofork(); 214 if (pid != 0) 215 { 216 /* parent -- pick up intermediate zombie */ 217 (void) waitfor(pid); 218 if (QueueIntvl != 0) 219 (void) setevent(QueueIntvl, runqueue, TRUE); 220 return; 221 } 222 /* child -- double fork */ 223 if (fork() != 0) 224 exit(EX_OK); 225 } 226 # ifdef LOG 227 if (LogLevel > 11) 228 syslog(LOG_DEBUG, "runqueue %s, pid=%d", QueueDir, getpid()); 229 # endif LOG 230 231 /* 232 ** Start making passes through the queue. 233 ** First, read and sort the entire queue. 234 ** Then, process the work in that order. 235 ** But if you take too long, start over. 236 */ 237 238 /* order the existing work requests */ 239 orderq(); 240 241 /* process them once at a time */ 242 while (WorkQ != NULL) 243 { 244 WORK *w = WorkQ; 245 246 WorkQ = WorkQ->w_next; 247 dowork(w); 248 free(w->w_name); 249 free((char *) w); 250 } 251 finis(); 252 } 253 /* 254 ** ORDERQ -- order the work queue. 255 ** 256 ** Parameters: 257 ** none. 258 ** 259 ** Returns: 260 ** none. 261 ** 262 ** Side Effects: 263 ** Sets WorkQ to the queue of available work, in order. 264 */ 265 266 # define WLSIZE 120 /* max size of worklist per sort */ 267 268 orderq() 269 { 270 register struct direct *d; 271 register WORK *w; 272 register WORK **wp; /* parent of w */ 273 DIR *f; 274 register int i; 275 WORK wlist[WLSIZE]; 276 int wn = 0; 277 extern workcmpf(); 278 279 /* clear out old WorkQ */ 280 for (w = WorkQ; w != NULL; ) 281 { 282 register WORK *nw = w->w_next; 283 284 WorkQ = nw; 285 free(w->w_name); 286 free((char *) w); 287 w = nw; 288 } 289 290 /* open the queue directory */ 291 f = opendir("."); 292 if (f == NULL) 293 { 294 syserr("orderq: cannot open \"%s\" as \".\"", QueueDir); 295 return; 296 } 297 298 /* 299 ** Read the work directory. 300 */ 301 302 while (wn < WLSIZE && (d = readdir(f)) != NULL) 303 { 304 FILE *cf; 305 char lbuf[MAXNAME]; 306 307 /* is this an interesting entry? */ 308 if (d->d_name[0] != 'q' || d->d_name[1] != 'f') 309 continue; 310 311 /* yes -- open control file */ 312 cf = fopen(d->d_name, "r"); 313 if (cf == NULL) 314 { 315 /* this may be some random person sending hir msgs */ 316 /* syserr("orderq: cannot open %s", cbuf); */ 317 errno = 0; 318 continue; 319 } 320 wlist[wn].w_name = newstr(d->d_name); 321 322 /* extract useful information */ 323 while (fgets(lbuf, sizeof lbuf, cf) != NULL) 324 { 325 if (lbuf[0] == 'P') 326 { 327 (void) sscanf(&lbuf[1], "%ld", &wlist[wn].w_pri); 328 break; 329 } 330 } 331 wn++; 332 (void) fclose(cf); 333 } 334 (void) closedir(f); 335 336 /* 337 ** Sort the work directory. 338 */ 339 340 qsort(wlist, wn, sizeof *wlist, workcmpf); 341 342 /* 343 ** Convert the work list into canonical form. 344 ** Should be turning it into a list of envelopes here perhaps. 345 */ 346 347 wp = &WorkQ; 348 for (i = 0; i < wn; i++) 349 { 350 w = (WORK *) xalloc(sizeof *w); 351 w->w_name = wlist[i].w_name; 352 w->w_pri = wlist[i].w_pri; 353 w->w_next = NULL; 354 *wp = w; 355 wp = &w->w_next; 356 } 357 358 # ifdef DEBUG 359 if (tTd(40, 1)) 360 { 361 for (w = WorkQ; w != NULL; w = w->w_next) 362 printf("%32s: pri=%ld\n", w->w_name, w->w_pri); 363 } 364 # endif DEBUG 365 } 366 /* 367 ** WORKCMPF -- compare function for ordering work. 368 ** 369 ** Parameters: 370 ** a -- the first argument. 371 ** b -- the second argument. 372 ** 373 ** Returns: 374 ** -1 if a < b 375 ** 0 if a == b 376 ** 1 if a > b 377 ** 378 ** Side Effects: 379 ** none. 380 */ 381 382 # define PRIFACT 1800 /* bytes each priority point is worth */ 383 384 workcmpf(a, b) 385 register WORK *a; 386 register WORK *b; 387 { 388 if (a->w_pri == b->w_pri) 389 return (0); 390 else if (a->w_pri > b->w_pri) 391 return (1); 392 else 393 return (-1); 394 } 395 /* 396 ** DOWORK -- do a work request. 397 ** 398 ** Parameters: 399 ** w -- the work request to be satisfied. 400 ** 401 ** Returns: 402 ** none. 403 ** 404 ** Side Effects: 405 ** The work request is satisfied if possible. 406 */ 407 408 dowork(w) 409 register WORK *w; 410 { 411 register int i; 412 413 # ifdef DEBUG 414 if (tTd(40, 1)) 415 printf("dowork: %s pri %ld\n", w->w_name, w->w_pri); 416 # endif DEBUG 417 418 /* 419 ** Fork for work. 420 */ 421 422 i = fork(); 423 if (i < 0) 424 { 425 syserr("dowork: cannot fork"); 426 return; 427 } 428 429 if (i == 0) 430 { 431 /* 432 ** CHILD 433 ** Lock the control file to avoid duplicate deliveries. 434 ** Then run the file as though we had just read it. 435 ** We save an idea of the temporary name so we 436 ** can recover on interrupt. 437 */ 438 439 /* set basic modes, etc. */ 440 (void) alarm(0); 441 CurEnv->e_flags &= ~EF_FATALERRS; 442 QueueRun = TRUE; 443 SendMode = SM_DELIVER; 444 ErrorMode = EM_MAIL; 445 CurEnv->e_id = &w->w_name[2]; 446 # ifdef LOG 447 if (LogLevel > 11) 448 syslog(LOG_DEBUG, "%s: dowork, pid=%d", CurEnv->e_id, 449 getpid()); 450 # endif LOG 451 452 /* don't use the headers from sendmail.cf... */ 453 CurEnv->e_header = NULL; 454 (void) chompheader("from: $q", TRUE); 455 456 /* create the link to the control file during processing */ 457 if (link(w->w_name, queuename(CurEnv, 'l')) < 0) 458 { 459 /* being processed by another queuer */ 460 # ifdef LOG 461 if (LogLevel > 4) 462 syslog(LOG_DEBUG, "%s: locked", CurEnv->e_id); 463 # endif LOG 464 exit(EX_OK); 465 } 466 467 /* create ourselves a transcript file */ 468 openxscrpt(); 469 470 /* do basic system initialization */ 471 initsys(); 472 473 /* read the queue control file */ 474 readqf(CurEnv); 475 CurEnv->e_flags |= EF_INQUEUE; 476 eatheader(CurEnv); 477 478 /* do the delivery */ 479 if (!bitset(EF_FATALERRS, CurEnv->e_flags)) 480 sendall(CurEnv, SM_DELIVER); 481 482 /* if still not sent, perhaps we should time out.... */ 483 # ifdef DEBUG 484 if (tTd(40, 3)) 485 printf("curtime=%ld, TimeOut=%ld\n", curtime(), 486 CurEnv->e_ctime + TimeOut); 487 # endif DEBUG 488 if (curtime() > CurEnv->e_ctime + TimeOut) 489 CurEnv->e_flags |= EF_TIMEOUT; 490 491 /* finish up and exit */ 492 finis(); 493 } 494 495 /* 496 ** Parent -- pick up results. 497 */ 498 499 errno = 0; 500 (void) waitfor(i); 501 } 502 /* 503 ** READQF -- read queue file and set up environment. 504 ** 505 ** Parameters: 506 ** e -- the envelope of the job to run. 507 ** 508 ** Returns: 509 ** none. 510 ** 511 ** Side Effects: 512 ** cf is read and created as the current job, as though 513 ** we had been invoked by argument. 514 */ 515 516 readqf(e) 517 register ENVELOPE *e; 518 { 519 register FILE *f; 520 char buf[MAXFIELD]; 521 extern char *fgetfolded(); 522 register char *p; 523 524 /* 525 ** Open the file created by queueup. 526 */ 527 528 p = queuename(e, 'q'); 529 f = fopen(p, "r"); 530 if (f == NULL) 531 { 532 syserr("readqf: no control file %s", p); 533 return; 534 } 535 FileName = p; 536 LineNumber = 0; 537 538 /* 539 ** Read and process the file. 540 */ 541 542 if (Verbose) 543 printf("\nRunning %s\n", e->e_id); 544 while (fgetfolded(buf, sizeof buf, f) != NULL) 545 { 546 switch (buf[0]) 547 { 548 case 'R': /* specify recipient */ 549 sendto(&buf[1], (ADDRESS *) NULL, &e->e_sendqueue); 550 break; 551 552 case 'H': /* header */ 553 (void) chompheader(&buf[1], FALSE); 554 break; 555 556 case 'S': /* sender */ 557 setsender(newstr(&buf[1])); 558 break; 559 560 case 'D': /* data file name */ 561 e->e_df = newstr(&buf[1]); 562 TempFile = fopen(e->e_df, "r"); 563 if (TempFile == NULL) 564 syserr("readqf: cannot open %s", e->e_df); 565 break; 566 567 case 'T': /* init time */ 568 (void) sscanf(&buf[1], "%ld", &e->e_ctime); 569 break; 570 571 case 'P': /* message priority */ 572 (void) sscanf(&buf[1], "%ld", &e->e_msgpriority); 573 574 /* make sure that big things get sent eventually */ 575 e->e_msgpriority -= WKTIMEFACT; 576 break; 577 578 case 'M': /* define macro */ 579 define(buf[1], newstr(&buf[2]), e); 580 break; 581 582 default: 583 syserr("readqf(%s): bad line \"%s\"", e->e_id, buf); 584 break; 585 } 586 } 587 588 FileName = NULL; 589 } 590 /* 591 ** TIMEOUT -- process timeout on queue file. 592 ** 593 ** Parameters: 594 ** e -- the envelope that timed out. 595 ** 596 ** Returns: 597 ** none. 598 ** 599 ** Side Effects: 600 ** Returns a message to the sender saying that this 601 ** message has timed out. 602 */ 603 604 timeout(e) 605 register ENVELOPE *e; 606 { 607 char buf[MAXLINE]; 608 extern char *pintvl(); 609 610 # ifdef DEBUG 611 if (tTd(40, 3)) 612 printf("timeout(%s)\n", e->e_id); 613 # endif DEBUG 614 e->e_to = NULL; 615 message(Arpa_Info, "Message has timed out"); 616 617 /* return message to sender */ 618 (void) sprintf(buf, "Cannot send mail for %s", pintvl(TimeOut, FALSE)); 619 (void) returntosender(buf, &e->e_from, TRUE); 620 621 /* arrange to remove files from queue */ 622 e->e_flags |= EF_CLRQUEUE; 623 } 624 625 # endif QUEUE 626