1 /* 2 ** Sendmail 3 ** Copyright (c) 1983 Eric P. Allman 4 ** Berkeley, California 5 ** 6 ** Copyright (c) 1983 Regents of the University of California. 7 ** All rights reserved. The Berkeley software License Agreement 8 ** specifies the terms and conditions for redistribution. 9 */ 10 11 12 # include "sendmail.h" 13 # include <sys/stat.h> 14 # include <sys/dir.h> 15 # include <signal.h> 16 # include <errno.h> 17 18 # ifndef QUEUE 19 # ifndef lint 20 static char SccsId[] = "@(#)queue.c 5.7 (Berkeley) 09/19/85 (no queueing)"; 21 # endif not lint 22 # else QUEUE 23 24 # ifndef lint 25 static char SccsId[] = "@(#)queue.c 5.7 (Berkeley) 09/19/85"; 26 # endif not lint 27 28 /* 29 ** Work queue. 30 */ 31 32 struct work 33 { 34 char *w_name; /* name of control file */ 35 long w_pri; /* priority of message, see below */ 36 long w_ctime; /* creation time of message */ 37 struct work *w_next; /* next in queue */ 38 }; 39 40 typedef struct work WORK; 41 42 WORK *WorkQ; /* queue of things to be done */ 43 /* 44 ** QUEUEUP -- queue a message up for future transmission. 45 ** 46 ** Parameters: 47 ** e -- the envelope to queue up. 48 ** queueall -- if TRUE, queue all addresses, rather than 49 ** just those with the QQUEUEUP flag set. 50 ** announce -- if TRUE, tell when you are queueing up. 51 ** 52 ** Returns: 53 ** none. 54 ** 55 ** Side Effects: 56 ** The current request are saved in a control file. 57 */ 58 59 queueup(e, queueall, announce) 60 register ENVELOPE *e; 61 bool queueall; 62 bool announce; 63 { 64 char *tf; 65 char *qf; 66 char buf[MAXLINE]; 67 register FILE *tfp; 68 register HDR *h; 69 register ADDRESS *q; 70 MAILER nullmailer; 71 72 /* 73 ** Create control file. 74 */ 75 76 tf = newstr(queuename(e, 't')); 77 tfp = fopen(tf, "w"); 78 if (tfp == NULL) 79 { 80 syserr("queueup: cannot create temp file %s", tf); 81 return; 82 } 83 (void) chmod(tf, FileMode); 84 85 # ifdef DEBUG 86 if (tTd(40, 1)) 87 printf("queueing %s\n", e->e_id); 88 # endif DEBUG 89 90 /* 91 ** If there is no data file yet, create one. 92 */ 93 94 if (e->e_df == NULL) 95 { 96 register FILE *dfp; 97 extern putbody(); 98 99 e->e_df = newstr(queuename(e, 'd')); 100 dfp = fopen(e->e_df, "w"); 101 if (dfp == NULL) 102 { 103 syserr("queueup: cannot create %s", e->e_df); 104 (void) fclose(tfp); 105 return; 106 } 107 (void) chmod(e->e_df, FileMode); 108 (*e->e_putbody)(dfp, ProgMailer, e); 109 (void) fclose(dfp); 110 e->e_putbody = putbody; 111 } 112 113 /* 114 ** Output future work requests. 115 ** Priority should be first, since it is read by orderq. 116 */ 117 118 /* output message priority */ 119 fprintf(tfp, "P%ld\n", e->e_msgpriority); 120 121 /* output creation time */ 122 fprintf(tfp, "T%ld\n", e->e_ctime); 123 124 /* output name of data file */ 125 fprintf(tfp, "D%s\n", e->e_df); 126 127 /* message from envelope, if it exists */ 128 if (e->e_message != NULL) 129 fprintf(tfp, "M%s\n", e->e_message); 130 131 /* output name of sender */ 132 fprintf(tfp, "S%s\n", e->e_from.q_paddr); 133 134 /* output list of recipient addresses */ 135 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 136 { 137 if (queueall ? !bitset(QDONTSEND, q->q_flags) : 138 bitset(QQUEUEUP, q->q_flags)) 139 { 140 fprintf(tfp, "R%s\n", q->q_paddr); 141 if (announce) 142 { 143 e->e_to = q->q_paddr; 144 message(Arpa_Info, "queued"); 145 if (LogLevel > 4) 146 logdelivery("queued"); 147 e->e_to = NULL; 148 } 149 #ifdef DEBUG 150 if (tTd(40, 1)) 151 { 152 printf("queueing "); 153 printaddr(q, FALSE); 154 } 155 #endif DEBUG 156 } 157 } 158 159 /* 160 ** Output headers for this message. 161 ** Expand macros completely here. Queue run will deal with 162 ** everything as absolute headers. 163 ** All headers that must be relative to the recipient 164 ** can be cracked later. 165 ** We set up a "null mailer" -- i.e., a mailer that will have 166 ** no effect on the addresses as they are output. 167 */ 168 169 bzero((char *) &nullmailer, sizeof nullmailer); 170 nullmailer.m_r_rwset = nullmailer.m_s_rwset = -1; 171 nullmailer.m_eol = "\n"; 172 173 define('g', "\001f", e); 174 for (h = e->e_header; h != NULL; h = h->h_link) 175 { 176 extern bool bitzerop(); 177 178 /* don't output null headers */ 179 if (h->h_value == NULL || h->h_value[0] == '\0') 180 continue; 181 182 /* don't output resent headers on non-resent messages */ 183 if (bitset(H_RESENT, h->h_flags) && !bitset(EF_RESENT, e->e_flags)) 184 continue; 185 186 /* output this header */ 187 fprintf(tfp, "H"); 188 189 /* if conditional, output the set of conditions */ 190 if (!bitzerop(h->h_mflags) && bitset(H_CHECK|H_ACHECK, h->h_flags)) 191 { 192 int j; 193 194 (void) putc('?', tfp); 195 for (j = '\0'; j <= '\177'; j++) 196 if (bitnset(j, h->h_mflags)) 197 (void) putc(j, tfp); 198 (void) putc('?', tfp); 199 } 200 201 /* output the header: expand macros, convert addresses */ 202 if (bitset(H_DEFAULT, h->h_flags)) 203 { 204 (void) expand(h->h_value, buf, &buf[sizeof buf], e); 205 fprintf(tfp, "%s: %s\n", h->h_field, buf); 206 } 207 else if (bitset(H_FROM|H_RCPT, h->h_flags)) 208 { 209 commaize(h, h->h_value, tfp, bitset(EF_OLDSTYLE, e->e_flags), 210 &nullmailer); 211 } 212 else 213 fprintf(tfp, "%s: %s\n", h->h_field, h->h_value); 214 } 215 216 /* 217 ** Clean up. 218 */ 219 220 (void) fclose(tfp); 221 qf = queuename(e, 'q'); 222 if (tf != NULL) 223 { 224 holdsigs(); 225 (void) unlink(qf); 226 if (link(tf, qf) < 0) 227 syserr("cannot link(%s, %s), df=%s", tf, qf, e->e_df); 228 else 229 (void) unlink(tf); 230 rlsesigs(); 231 } 232 233 # ifdef LOG 234 /* save log info */ 235 if (LogLevel > 15) 236 syslog(LOG_DEBUG, "%s: queueup, qf=%s, df=%s\n", e->e_id, qf, e->e_df); 237 # endif LOG 238 } 239 /* 240 ** RUNQUEUE -- run the jobs in the queue. 241 ** 242 ** Gets the stuff out of the queue in some presumably logical 243 ** order and processes them. 244 ** 245 ** Parameters: 246 ** forkflag -- TRUE if the queue scanning should be done in 247 ** a child process. We double-fork so it is not our 248 ** child and we don't have to clean up after it. 249 ** 250 ** Returns: 251 ** none. 252 ** 253 ** Side Effects: 254 ** runs things in the mail queue. 255 */ 256 257 runqueue(forkflag) 258 bool forkflag; 259 { 260 extern bool shouldqueue(); 261 262 /* 263 ** If no work will ever be selected, don't even bother reading 264 ** the queue. 265 */ 266 267 if (shouldqueue(-100000000L)) 268 { 269 if (Verbose) 270 printf("Skipping queue run -- load average too high\n"); 271 272 if (forkflag) 273 return; 274 finis(); 275 } 276 277 /* 278 ** See if we want to go off and do other useful work. 279 */ 280 281 if (forkflag) 282 { 283 int pid; 284 285 pid = dofork(); 286 if (pid != 0) 287 { 288 /* parent -- pick up intermediate zombie */ 289 (void) waitfor(pid); 290 if (QueueIntvl != 0) 291 (void) setevent(QueueIntvl, runqueue, TRUE); 292 return; 293 } 294 /* child -- double fork */ 295 if (fork() != 0) 296 exit(EX_OK); 297 } 298 299 setproctitle("running queue"); 300 301 # ifdef LOG 302 if (LogLevel > 11) 303 syslog(LOG_DEBUG, "runqueue %s, pid=%d", QueueDir, getpid()); 304 # endif LOG 305 306 /* 307 ** Release any resources used by the daemon code. 308 */ 309 310 # ifdef DAEMON 311 clrdaemon(); 312 # endif DAEMON 313 314 /* 315 ** Start making passes through the queue. 316 ** First, read and sort the entire queue. 317 ** Then, process the work in that order. 318 ** But if you take too long, start over. 319 */ 320 321 /* order the existing work requests */ 322 (void) orderq(FALSE); 323 324 /* process them once at a time */ 325 while (WorkQ != NULL) 326 { 327 WORK *w = WorkQ; 328 329 WorkQ = WorkQ->w_next; 330 dowork(w); 331 free(w->w_name); 332 free((char *) w); 333 } 334 finis(); 335 } 336 /* 337 ** ORDERQ -- order the work queue. 338 ** 339 ** Parameters: 340 ** doall -- if set, include everything in the queue (even 341 ** the jobs that cannot be run because the load 342 ** average is too high). Otherwise, exclude those 343 ** jobs. 344 ** 345 ** Returns: 346 ** The number of request in the queue (not necessarily 347 ** the number of requests in WorkQ however). 348 ** 349 ** Side Effects: 350 ** Sets WorkQ to the queue of available work, in order. 351 */ 352 353 # define WLSIZE 120 /* max size of worklist per sort */ 354 355 orderq(doall) 356 bool doall; 357 { 358 register struct direct *d; 359 register WORK *w; 360 register WORK **wp; /* parent of w */ 361 DIR *f; 362 register int i; 363 WORK wlist[WLSIZE+1]; 364 int wn = -1; 365 extern workcmpf(); 366 367 /* clear out old WorkQ */ 368 for (w = WorkQ; w != NULL; ) 369 { 370 register WORK *nw = w->w_next; 371 372 WorkQ = nw; 373 free(w->w_name); 374 free((char *) w); 375 w = nw; 376 } 377 378 /* open the queue directory */ 379 f = opendir("."); 380 if (f == NULL) 381 { 382 syserr("orderq: cannot open \"%s\" as \".\"", QueueDir); 383 return (0); 384 } 385 386 /* 387 ** Read the work directory. 388 */ 389 390 while ((d = readdir(f)) != NULL) 391 { 392 FILE *cf; 393 char lbuf[MAXNAME]; 394 395 /* is this an interesting entry? */ 396 if (d->d_name[0] != 'q' || d->d_name[1] != 'f') 397 continue; 398 399 /* yes -- open control file (if not too many files) */ 400 if (++wn >= WLSIZE) 401 continue; 402 cf = fopen(d->d_name, "r"); 403 if (cf == NULL) 404 { 405 /* this may be some random person sending hir msgs */ 406 /* syserr("orderq: cannot open %s", cbuf); */ 407 #ifdef DEBUG 408 if (tTd(41, 2)) 409 printf("orderq: cannot open %s (%d)\n", 410 d->d_name, errno); 411 #endif DEBUG 412 errno = 0; 413 wn--; 414 continue; 415 } 416 wlist[wn].w_name = newstr(d->d_name); 417 418 /* extract useful information */ 419 while (fgets(lbuf, sizeof lbuf, cf) != NULL) 420 { 421 extern long atol(); 422 423 switch (lbuf[0]) 424 { 425 case 'P': 426 wlist[wn].w_pri = atol(&lbuf[1]); 427 break; 428 429 case 'T': 430 wlist[wn].w_ctime = atol(&lbuf[1]); 431 break; 432 } 433 } 434 (void) fclose(cf); 435 436 if (!doall && shouldqueue(wlist[wn].w_pri)) 437 { 438 /* don't even bother sorting this job in */ 439 wn--; 440 } 441 } 442 (void) closedir(f); 443 wn++; 444 445 /* 446 ** Sort the work directory. 447 */ 448 449 qsort((char *) wlist, min(wn, WLSIZE), sizeof *wlist, workcmpf); 450 451 /* 452 ** Convert the work list into canonical form. 453 ** Should be turning it into a list of envelopes here perhaps. 454 */ 455 456 wp = &WorkQ; 457 for (i = min(wn, WLSIZE); --i >= 0; ) 458 { 459 w = (WORK *) xalloc(sizeof *w); 460 w->w_name = wlist[i].w_name; 461 w->w_pri = wlist[i].w_pri; 462 w->w_ctime = wlist[i].w_ctime; 463 w->w_next = NULL; 464 *wp = w; 465 wp = &w->w_next; 466 } 467 468 # ifdef DEBUG 469 if (tTd(40, 1)) 470 { 471 for (w = WorkQ; w != NULL; w = w->w_next) 472 printf("%32s: pri=%ld\n", w->w_name, w->w_pri); 473 } 474 # endif DEBUG 475 476 return (wn); 477 } 478 /* 479 ** WORKCMPF -- compare function for ordering work. 480 ** 481 ** Parameters: 482 ** a -- the first argument. 483 ** b -- the second argument. 484 ** 485 ** Returns: 486 ** 1 if a < b 487 ** 0 if a == b 488 ** -1 if a > b 489 ** 490 ** Side Effects: 491 ** none. 492 */ 493 494 workcmpf(a, b) 495 register WORK *a; 496 register WORK *b; 497 { 498 long pa = a->w_pri + a->w_ctime; 499 long pb = b->w_pri + b->w_ctime; 500 501 if (pa == pb) 502 return (0); 503 else if (pa > pb) 504 return (-1); 505 else 506 return (1); 507 } 508 /* 509 ** DOWORK -- do a work request. 510 ** 511 ** Parameters: 512 ** w -- the work request to be satisfied. 513 ** 514 ** Returns: 515 ** none. 516 ** 517 ** Side Effects: 518 ** The work request is satisfied if possible. 519 */ 520 521 dowork(w) 522 register WORK *w; 523 { 524 register int i; 525 extern bool shouldqueue(); 526 527 # ifdef DEBUG 528 if (tTd(40, 1)) 529 printf("dowork: %s pri %ld\n", w->w_name, w->w_pri); 530 # endif DEBUG 531 532 /* 533 ** Ignore jobs that are too expensive for the moment. 534 */ 535 536 if (shouldqueue(w->w_pri)) 537 { 538 if (Verbose) 539 printf("\nSkipping %s\n", w->w_name); 540 return; 541 } 542 543 /* 544 ** Fork for work. 545 */ 546 547 if (ForkQueueRuns) 548 { 549 i = fork(); 550 if (i < 0) 551 { 552 syserr("dowork: cannot fork"); 553 return; 554 } 555 } 556 else 557 { 558 i = 0; 559 } 560 561 if (i == 0) 562 { 563 /* 564 ** CHILD 565 ** Lock the control file to avoid duplicate deliveries. 566 ** Then run the file as though we had just read it. 567 ** We save an idea of the temporary name so we 568 ** can recover on interrupt. 569 */ 570 571 /* set basic modes, etc. */ 572 (void) alarm(0); 573 closexscript(CurEnv); 574 CurEnv->e_flags &= ~EF_FATALERRS; 575 QueueRun = TRUE; 576 ErrorMode = EM_MAIL; 577 CurEnv->e_id = &w->w_name[2]; 578 # ifdef LOG 579 if (LogLevel > 11) 580 syslog(LOG_DEBUG, "%s: dowork, pid=%d", CurEnv->e_id, 581 getpid()); 582 # endif LOG 583 584 /* don't use the headers from sendmail.cf... */ 585 CurEnv->e_header = NULL; 586 587 /* lock the control file during processing */ 588 if (link(w->w_name, queuename(CurEnv, 'l')) < 0) 589 { 590 /* being processed by another queuer */ 591 # ifdef LOG 592 if (LogLevel > 4) 593 syslog(LOG_DEBUG, "%s: locked", CurEnv->e_id); 594 # endif LOG 595 if (ForkQueueRuns) 596 exit(EX_OK); 597 else 598 return; 599 } 600 601 /* do basic system initialization */ 602 initsys(); 603 604 /* read the queue control file */ 605 readqf(CurEnv, TRUE); 606 CurEnv->e_flags |= EF_INQUEUE; 607 eatheader(CurEnv); 608 609 /* do the delivery */ 610 if (!bitset(EF_FATALERRS, CurEnv->e_flags)) 611 sendall(CurEnv, SM_DELIVER); 612 613 /* finish up and exit */ 614 if (ForkQueueRuns) 615 finis(); 616 else 617 dropenvelope(CurEnv); 618 } 619 else 620 { 621 /* 622 ** Parent -- pick up results. 623 */ 624 625 errno = 0; 626 (void) waitfor(i); 627 } 628 } 629 /* 630 ** READQF -- read queue file and set up environment. 631 ** 632 ** Parameters: 633 ** e -- the envelope of the job to run. 634 ** full -- if set, read in all information. Otherwise just 635 ** read in info needed for a queue print. 636 ** 637 ** Returns: 638 ** none. 639 ** 640 ** Side Effects: 641 ** cf is read and created as the current job, as though 642 ** we had been invoked by argument. 643 */ 644 645 readqf(e, full) 646 register ENVELOPE *e; 647 bool full; 648 { 649 char *qf; 650 register FILE *qfp; 651 char buf[MAXFIELD]; 652 extern char *fgetfolded(); 653 extern long atol(); 654 655 /* 656 ** Read and process the file. 657 */ 658 659 qf = queuename(e, 'q'); 660 qfp = fopen(qf, "r"); 661 if (qfp == NULL) 662 { 663 syserr("readqf: no control file %s", qf); 664 return; 665 } 666 FileName = qf; 667 LineNumber = 0; 668 if (Verbose && full) 669 printf("\nRunning %s\n", e->e_id); 670 while (fgetfolded(buf, sizeof buf, qfp) != NULL) 671 { 672 switch (buf[0]) 673 { 674 case 'R': /* specify recipient */ 675 sendtolist(&buf[1], (ADDRESS *) NULL, &e->e_sendqueue); 676 break; 677 678 case 'H': /* header */ 679 if (full) 680 (void) chompheader(&buf[1], FALSE); 681 break; 682 683 case 'M': /* message */ 684 e->e_message = newstr(&buf[1]); 685 break; 686 687 case 'S': /* sender */ 688 setsender(newstr(&buf[1])); 689 break; 690 691 case 'D': /* data file name */ 692 if (!full) 693 break; 694 e->e_df = newstr(&buf[1]); 695 e->e_dfp = fopen(e->e_df, "r"); 696 if (e->e_dfp == NULL) 697 syserr("readqf: cannot open %s", e->e_df); 698 break; 699 700 case 'T': /* init time */ 701 e->e_ctime = atol(&buf[1]); 702 break; 703 704 case 'P': /* message priority */ 705 e->e_msgpriority = atol(&buf[1]); 706 707 /* make sure that big things get sent eventually */ 708 e->e_msgpriority -= WKTIMEFACT; 709 break; 710 711 case '\0': /* blank line; ignore */ 712 break; 713 714 default: 715 syserr("readqf(%s:%d): bad line \"%s\"", e->e_id, 716 LineNumber, buf); 717 break; 718 } 719 } 720 721 (void) fclose(qfp); 722 FileName = NULL; 723 724 /* 725 ** If we haven't read any lines, this queue file is empty. 726 ** Arrange to remove it without referencing any null pointers. 727 */ 728 729 if (LineNumber == 0) 730 { 731 errno = 0; 732 e->e_flags |= EF_CLRQUEUE | EF_FATALERRS | EF_RESPONSE; 733 } 734 } 735 /* 736 ** PRINTQUEUE -- print out a representation of the mail queue 737 ** 738 ** Parameters: 739 ** none. 740 ** 741 ** Returns: 742 ** none. 743 ** 744 ** Side Effects: 745 ** Prints a listing of the mail queue on the standard output. 746 */ 747 748 printqueue() 749 { 750 register WORK *w; 751 FILE *f; 752 int nrequests; 753 char buf[MAXLINE]; 754 755 /* 756 ** Read and order the queue. 757 */ 758 759 nrequests = orderq(TRUE); 760 761 /* 762 ** Print the work list that we have read. 763 */ 764 765 /* first see if there is anything */ 766 if (nrequests <= 0) 767 { 768 printf("Mail queue is empty\n"); 769 return; 770 } 771 772 printf("\t\tMail Queue (%d request%s", nrequests, nrequests == 1 ? "" : "s"); 773 if (nrequests > WLSIZE) 774 printf(", only %d printed", WLSIZE); 775 printf(")\n--QID-- --Size-- -----Q-Time----- ------------Sender/Recipient------------\n"); 776 for (w = WorkQ; w != NULL; w = w->w_next) 777 { 778 struct stat st; 779 auto time_t submittime = 0; 780 long dfsize = -1; 781 char lf[20]; 782 char message[MAXLINE]; 783 extern bool shouldqueue(); 784 785 f = fopen(w->w_name, "r"); 786 if (f == NULL) 787 { 788 errno = 0; 789 continue; 790 } 791 printf("%7s", w->w_name + 2); 792 (void) strcpy(lf, w->w_name); 793 lf[0] = 'l'; 794 if (stat(lf, &st) >= 0) 795 printf("*"); 796 else if (shouldqueue(w->w_pri)) 797 printf("X"); 798 else 799 printf(" "); 800 errno = 0; 801 802 message[0] = '\0'; 803 while (fgets(buf, sizeof buf, f) != NULL) 804 { 805 fixcrlf(buf, TRUE); 806 switch (buf[0]) 807 { 808 case 'M': /* error message */ 809 (void) strcpy(message, &buf[1]); 810 break; 811 812 case 'S': /* sender name */ 813 printf("%8ld %.16s %.45s", dfsize, 814 ctime(&submittime), &buf[1]); 815 if (message[0] != '\0') 816 printf("\n\t\t (%.62s)", message); 817 break; 818 819 case 'R': /* recipient name */ 820 printf("\n\t\t\t\t %.45s", &buf[1]); 821 break; 822 823 case 'T': /* creation time */ 824 submittime = atol(&buf[1]); 825 break; 826 827 case 'D': /* data file name */ 828 if (stat(&buf[1], &st) >= 0) 829 dfsize = st.st_size; 830 break; 831 } 832 } 833 if (submittime == (time_t) 0) 834 printf(" (no control file)"); 835 printf("\n"); 836 (void) fclose(f); 837 } 838 } 839 840 # endif QUEUE 841 /* 842 ** QUEUENAME -- build a file name in the queue directory for this envelope. 843 ** 844 ** Assigns an id code if one does not already exist. 845 ** This code is very careful to avoid trashing existing files 846 ** under any circumstances. 847 ** We first create an nf file that is only used when 848 ** assigning an id. This file is always empty, so that 849 ** we can never accidently truncate an lf file. 850 ** 851 ** Parameters: 852 ** e -- envelope to build it in/from. 853 ** type -- the file type, used as the first character 854 ** of the file name. 855 ** 856 ** Returns: 857 ** a pointer to the new file name (in a static buffer). 858 ** 859 ** Side Effects: 860 ** Will create the lf and qf files if no id code is 861 ** already assigned. This will cause the envelope 862 ** to be modified. 863 */ 864 865 char * 866 queuename(e, type) 867 register ENVELOPE *e; 868 char type; 869 { 870 static char buf[MAXNAME]; 871 static int pid = -1; 872 char c1 = 'A'; 873 char c2 = 'A'; 874 875 if (e->e_id == NULL) 876 { 877 char qf[20]; 878 char nf[20]; 879 char lf[20]; 880 881 /* find a unique id */ 882 if (pid != getpid()) 883 { 884 /* new process -- start back at "AA" */ 885 pid = getpid(); 886 c1 = 'A'; 887 c2 = 'A' - 1; 888 } 889 (void) sprintf(qf, "qfAA%05d", pid); 890 (void) strcpy(lf, qf); 891 lf[0] = 'l'; 892 (void) strcpy(nf, qf); 893 nf[0] = 'n'; 894 895 while (c1 < '~' || c2 < 'Z') 896 { 897 int i; 898 899 if (c2 >= 'Z') 900 { 901 c1++; 902 c2 = 'A' - 1; 903 } 904 lf[2] = nf[2] = qf[2] = c1; 905 lf[3] = nf[3] = qf[3] = ++c2; 906 # ifdef DEBUG 907 if (tTd(7, 20)) 908 printf("queuename: trying \"%s\"\n", nf); 909 # endif DEBUG 910 911 # ifdef QUEUE 912 if (access(lf, 0) >= 0 || access(qf, 0) >= 0) 913 continue; 914 errno = 0; 915 i = creat(nf, FileMode); 916 if (i < 0) 917 { 918 (void) unlink(nf); /* kernel bug */ 919 continue; 920 } 921 (void) close(i); 922 i = link(nf, lf); 923 (void) unlink(nf); 924 if (i < 0) 925 continue; 926 if (link(lf, qf) >= 0) 927 break; 928 (void) unlink(lf); 929 # else QUEUE 930 if (close(creat(qf, FileMode)) >= 0) 931 break; 932 # endif QUEUE 933 } 934 if (c1 >= '~' && c2 >= 'Z') 935 { 936 syserr("queuename: Cannot create \"%s\" in \"%s\"", 937 qf, QueueDir); 938 exit(EX_OSERR); 939 } 940 e->e_id = newstr(&qf[2]); 941 define('i', e->e_id, e); 942 # ifdef DEBUG 943 if (tTd(7, 1)) 944 printf("queuename: assigned id %s, env=%x\n", e->e_id, e); 945 # ifdef LOG 946 if (LogLevel > 16) 947 syslog(LOG_DEBUG, "%s: assigned id", e->e_id); 948 # endif LOG 949 # endif DEBUG 950 } 951 952 if (type == '\0') 953 return (NULL); 954 (void) sprintf(buf, "%cf%s", type, e->e_id); 955 # ifdef DEBUG 956 if (tTd(7, 2)) 957 printf("queuename: %s\n", buf); 958 # endif DEBUG 959 return (buf); 960 } 961 /* 962 ** UNLOCKQUEUE -- unlock the queue entry for a specified envelope 963 ** 964 ** Parameters: 965 ** e -- the envelope to unlock. 966 ** 967 ** Returns: 968 ** none 969 ** 970 ** Side Effects: 971 ** unlocks the queue for `e'. 972 */ 973 974 unlockqueue(e) 975 ENVELOPE *e; 976 { 977 /* remove the transcript */ 978 #ifdef DEBUG 979 # ifdef LOG 980 if (LogLevel > 19) 981 syslog(LOG_DEBUG, "%s: unlock", e->e_id); 982 # endif LOG 983 if (!tTd(51, 4)) 984 #endif DEBUG 985 xunlink(queuename(e, 'x')); 986 987 # ifdef QUEUE 988 /* last but not least, remove the lock */ 989 xunlink(queuename(e, 'l')); 990 # endif QUEUE 991 } 992