diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/support/pop/RCS/popd.c,v

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  89 desc
  90 @@
  91
  92
  93 1.16
  94 log
  95 @off_t fixes for BSD44
  96 @
  97 text
  98 @/* popd.c - the POP server */
  99 #ifndef lint
 100 static char ident[] = "@@(#)$Id: popd.c,v 1.15 1993/02/26 22:11:12 jromine Exp jromine $";
 101 #endif  /* lint */
 102
 103 /* Author:      Marshall T. Rose        <MRose@@UDel>   (MTR)
 104                 Department of Computer Science and Information Sciences
 105                 University of Delaware
 106                 Newark, DE  19716
 107                 302/451-1951
 108
 109    Date:        Sun Oct 28 16:23:26 1984
 110  */
 111
 112 #include <errno.h>
 113 #include <signal.h>
 114 #include <stdio.h>
 115 #include "../h/strings.h"
 116 #include "syslog.h"
 117 #include <sys/types.h>
 118 #include <sys/file.h>
 119 #ifndef NOIOCTLH
 120 #include <sys/ioctl.h>
 121 #endif
 122 #include <sys/socket.h>
 123 #include <sys/time.h>
 124 #ifdef  SIGTSTP
 125 #include <sys/resource.h>
 126 #include <sys/wait.h>
 127 #endif
 128 #include <netinet/in.h>
 129 #include <netdb.h>
 130 #include <arpa/inet.h>
 131 #ifdef KPOP
 132 #include <krb.h>
 133
 134 static Key_schedule schedule;
 135 static KTEXT_ST ticket;
 136 static AUTH_DAT kdata;
 137 #endif
 138 #ifdef  SYS5
 139 #include <fcntl.h>
 140 #endif
 141
 142
 143 #ifdef  SYS5
 144 #define u_short ushort
 145 #endif
 146
 147 #define NOTOK   (-1)
 148 #define OK      0
 149
 150 #define NULLCP  ((char *) 0)
 151 #define NULLRP  ((struct rusage *) 0)
 152
 153 #define FAST                    /* fast start-up of BBoards */
 154
 155 /* \f */
 156
 157 extern int  errno;
 158 #ifndef BSD44
 159 extern int  sys_nerr;
 160 extern char *sys_errlist[];
 161 extern char *sys_siglist[];
 162 #endif
 163
 164
 165 int  debug = 0;
 166 static int  nbits = ((sizeof (int)) * 8);
 167 static int  options = 0;
 168
 169 #ifndef POPSERVICE
 170 #define POPSERVICE      "pop"
 171 #endif
 172
 173 char *myname = "popd";
 174 char myhost[BUFSIZ];
 175 static char *myprotocol = "tcp";
 176 static char *myservice = POPSERVICE;
 177
 178 static struct sockaddr_in   in_socket;
 179 static struct sockaddr_in  *isock = &in_socket;
 180
 181 #ifdef KPOP
 182 static AUTH_DAT kdata;
 183 #endif
 184
 185 static TYPESIG  chldser ();
 186 void    padios (), padvise ();
 187
 188 static  server(), arginit(), envinit();
 189 /* \f */
 190
 191 /* ARGSUSED */
 192
 193 main (argc, argv, envp)
 194 int     argc;
 195 char  **argv,
 196       **envp;
 197 {
 198 #ifdef KPOP
 199     int     i;
 200 #else
 201     int     fd,
 202             sd;
 203     int     on = 1;
 204     struct servent *sp;
 205     struct sockaddr_in  out_socket,
 206                        *osock = &out_socket;
 207 #endif
 208
 209 #ifdef KPOP
 210     i = sizeof(in_socket);
 211     if (getpeername(0, &in_socket, &i) < 0)
 212       padios("getpeername", "bad status");
 213 #else
 214     if ((sp = getservbyname (myservice, myprotocol)) == NULL)
 215         padios (NULLCP, "%s/%s: unknown service", myprotocol, myservice);
 216     isock -> sin_family = AF_INET;
 217     isock -> sin_port = sp -> s_port;
 218     isock -> sin_addr.s_addr = INADDR_ANY;
 219 #endif
 220     arginit (argv);
 221     envinit ();
 222
 223 #ifndef KPOP
 224 #ifdef  RESTART
 225     for (;;) {
 226         char    reason[BUFSIZ];
 227 #if defined(BSD42) && !defined(WAITINT)
 228         union wait status;
 229 #else
 230         int status;
 231 #endif
 232
 233         switch (fork ()) {
 234             case NOTOK:
 235                 sleep (5);
 236                 continue;
 237
 238             case OK:
 239                 break;
 240
 241             default:
 242                 sleep (60);
 243                 (void) wait3 (&status, 0, NULLRP);
 244                 if (WIFEXITED (status))
 245                     (void) sprintf (reason, "exit=0%o", status.w_retcode);
 246                 else
 247                     if (WIFSIGNALED (status))
 248                         (void) sprintf (reason, "signal=%s%s",
 249                                 status.w_termsig < NSIG
 250                                 ? sys_siglist[status.w_termsig] : "unknown",
 251                                 status.w_coredump ? " (core dumped)" : NULL);
 252                     else
 253                         (void) strcpy (reason, "stopped(!!)");
 254                 padvise (NULLCP, LOG_WARNING, "%s/%s server has terminated -- %s",
 255                         sp -> s_proto, sp -> s_name, reason);
 256                 continue;
 257         }
 258         break;
 259     }
 260
 261     closelog ();
 262 #ifndef BSD43
 263     openlog (myname, LOG_PID);
 264 #else   /* BSD43 */
 265     openlog (myname, LOG_PID, LOG_DAEMON);
 266 #endif  /* BSD43 */
 267     padvise (NULLCP, LOG_INFO, "restart");
 268 #endif  /* RESTART */
 269
 270 /* \f */
 271
 272     if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == NOTOK)
 273         padios ("socket", "unable to create");
 274 #ifndef BSD43
 275     if (options & SO_DEBUG)
 276         if (setsockopt (sd, SOL_SOCKET, SO_DEBUG, NULL, 0) == NOTOK)
 277             padvise ("SO_DEBUG", LOG_WARNING, "unable to set socket option");
 278     if (setsockopt (sd, SOL_SOCKET, SO_KEEPALIVE, NULL, 0) == NOTOK)
 279         padvise ("SO_KEEPALIVE", LOG_WARNING, "unable to set socket option");
 280 #else   /* BSD43 */
 281     if (options & SO_DEBUG)
 282         if (setsockopt (sd, SOL_SOCKET, SO_DEBUG, &on, sizeof on) == NOTOK)
 283             padvise ("SO_DEBUG", LOG_WARNING, "unable to set socket option");
 284     if (setsockopt (sd, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof on) == NOTOK)
 285         padvise ("SO_KEEPALIVE", LOG_WARNING, "unable to set socket option");
 286 #endif  /* BSD43 */
 287     if (bind (sd, (struct sockaddr *) isock, sizeof *isock) == NOTOK)
 288         padios ("socket", "unable to bind");
 289
 290 #ifdef  SIGCHLD
 291     (void) signal (SIGCHLD, chldser);
 292 #endif  /* SIGCHLD */
 293     (void) listen (sd, SOMAXCONN);
 294 #endif /* KPOP */
 295 #ifdef  FAST
 296     popinit ();
 297 #endif  /* FAST */
 298 #ifndef KPOP
 299     for (;;) {
 300         int     i = sizeof *osock;
 301
 302         if ((fd = accept (sd, (struct sockaddr *) osock, &i)) == NOTOK) {
 303             if (errno != EINTR)
 304                 padvise ("socket", LOG_WARNING,
 305                     "unable to accept connection on");
 306             continue;
 307         }
 308 #endif
 309 #ifdef  FAST
 310         popassert ();
 311 #endif  /* FAST */
 312 #ifndef KPOP
 313         switch (fork ()) {
 314             case OK:
 315                 (void) close (sd);
 316 #ifdef  SIGCHLD
 317                 (void) signal (SIGCHLD, SIG_DFL);
 318 #endif  /* SIGCHLD */
 319                 server (fd, osock);
 320                 _exit (0);
 321
 322             case NOTOK:
 323                 padvise ("socket", LOG_WARNING,
 324                     "no forks, so rejecting connection on");
 325             default:
 326                 (void) close (fd);
 327         }
 328     }
 329 #else
 330     server (0, isock);
 331 #endif
 332 }
 333
 334 /* \f */
 335
 336 static  server (fd, sin)
 337 int     fd;
 338 struct sockaddr_in *sin;
 339 {
 340     u_short port;
 341     struct hostent *hp;
 342     struct in_addr *addr;
 343 #ifdef KPOP
 344     int auth;
 345     int sin_len;
 346     struct sockaddr_in faddr;
 347     char instance[INST_SZ];
 348     char version[9];
 349     char user[ANAME_SZ];
 350 #endif
 351
 352     closelog ();
 353 #ifndef BSD43
 354     openlog (myname, LOG_PID);
 355 #else   /* BSD43 */
 356     openlog (myname, LOG_PID, LOG_DAEMON);
 357 #endif  /* BSD43 */
 358     port = ntohs (sin -> sin_port);
 359     addr = &sin -> sin_addr;
 360     hp = gethostbyaddr ((char *)addr, sizeof *addr, sin -> sin_family);
 361     padvise (NULLCP, LOG_INFO, "servicing %s/%d",
 362             hp ? hp -> h_name : inet_ntoa (*addr), port);
 363     if (fd != 0)
 364       {
 365         (void) dup2 (fd, 0);
 366         (void) close (fd);
 367       }
 368     (void) dup2 (0, 1);
 369
 370 #ifdef KPOP
 371     sin_len = sizeof (struct sockaddr_in);
 372     if (getpeername(0, &faddr, &sin_len) < 0) {
 373       padvise("getpeername", LOG_INFO, "");
 374       exit(1);
 375     }
 376     strcpy(instance, "*");
 377     auth = krb_recvauth(0L, 0, &ticket, "pop", instance,
 378                         &faddr, (struct sockaddr_in *)NULL,
 379                         &kdata, "", schedule, version);
 380     if (auth == KSUCCESS)
 381       auth = krb_kntoln(&kdata, user);
 382
 383     if (auth != KSUCCESS) {
 384       padvise(NULLCP, LOG_INFO, "bad kerberos data, not ok'ing");
 385       kpop (0, 1, NULLCP, NULLCP, auth); /* respond(NOTOK, krb_err_txt[auth]); */
 386     } else {
 387       kpop (0, 1, user, (hp ? hp -> h_name : NULLCP), 0);
 388     }
 389 #else
 390     pop (0, 1, sin -> sin_family == AF_INET && port < IPPORT_RESERVED && hp,
 391             hp ? hp -> h_name : NULLCP);
 392 #endif
 393 }
 394
 395 /* \f */
 396
 397 static  arginit (vec)
 398 char    **vec;
 399 {
 400     int     port;
 401     register char  *ap;
 402     struct hostent *hp;
 403
 404     if (myname = rindex (*vec, '/'))
 405         myname++;
 406     if (myname == NULL || *myname == 0)
 407         myname = *vec;
 408
 409     (void) gethostname (myhost, sizeof myhost);
 410     if (hp = gethostbyname (myhost))
 411         (void) strcpy (myhost, hp -> h_name);
 412 #ifndef BSD42
 413     nbits = _NFILE;
 414 #else   /* BSD42 */
 415     nbits = getdtablesize ();
 416 #endif  /* BSD42 */
 417
 418     for (vec++; ap = *vec; vec++) {
 419         if (*ap == '-')
 420             switch (*++ap) {
 421                 case 'd':
 422                     options |= SO_DEBUG;
 423                     continue;
 424
 425                 case 'p':
 426                     if ((ap = *++vec) == NULL
 427                             || *ap == '-'
 428                             || (port = atoi (ap)) <= 0)
 429                         padios (NULLCP, "usage: %s -p portno", myname);
 430                     isock -> sin_port = htons ((u_short) port);
 431                     continue;
 432
 433                 default:
 434                     padios (NULLCP, "-%s: unknown switch", ap);
 435             }
 436
 437         padios (NULLCP, "usage: %s [switches]", myname);
 438     }
 439 }
 440
 441 /* \f */
 442
 443 static  envinit () {
 444 #ifndef KPOP
 445     int     i,
 446             sd;
 447
 448     if (!(debug = isatty (2))) {
 449         for (i = 0; i < 5; i++) {
 450             switch (fork ()) {
 451                 case NOTOK:
 452                     sleep (5);
 453                     continue;
 454
 455                 case OK:
 456                     break;
 457
 458                 default:
 459                     _exit (0);
 460             }
 461             break;
 462         }
 463
 464         (void) chdir ("/");
 465
 466         if ((sd = open ("/dev/null", O_RDWR)) == NOTOK)
 467             padios ("/dev/null", "unable to read");
 468         if (sd != 0)
 469             (void) dup2 (sd, 0), (void) close (sd);
 470         (void) dup2 (0, 1);
 471         (void) dup2 (0, 2);
 472
 473         if ((sd = open ("/dev/tty", O_RDWR)) != NOTOK) {
 474 #ifdef  TIOCNOTTY
 475             (void) ioctl (sd, TIOCNOTTY, NULLCP);
 476 #endif  /* TIOCNOTTY */
 477             (void) close (sd);
 478         }
 479     }
 480
 481     for (sd = 3; sd < nbits; sd++)
 482         (void) close (sd);
 483 #endif /* KPOP */
 484
 485     (void) signal (SIGPIPE, SIG_IGN);
 486
 487 #ifndef BSD43
 488     openlog (myname, LOG_PID);
 489 #else   /* BSD43 */
 490     openlog (myname, LOG_PID, LOG_DAEMON);
 491 #endif  /* BSD43 */
 492     padvise (NULLCP, LOG_INFO, "starting");
 493     if (debug)
 494         padvise (NULLCP, LOG_DEBUG, "options=0x%x port=%d",
 495                 options, ntohs (isock -> sin_port));
 496 }
 497
 498 /* \f */
 499
 500 #ifndef KPOP
 501
 502 /* ARGSUSED */
 503
 504 #ifdef  SIGCHLD
 505
 506 static TYPESIG chldser (sig, code, sc)
 507 int     sig;
 508 long    code;
 509 struct sigcontext *sc;
 510 {
 511 #if defined(BSD42) && !defined(WAITINT)
 512     union wait status;
 513 #else
 514     int status;
 515 #endif
 516
 517     while (wait3 (&status, WNOHANG, NULLRP) > 0)
 518         continue;
 519 }
 520
 521 #endif /* SIGCHLD */
 522 #endif /* KPOP */
 523
 524 /* \f */
 525
 526 /* VARARGS2 */
 527
 528 void    padios (what, fmt, a, b, c, d, e, f, g, h, i, j)
 529 char   *what,
 530        *fmt,
 531        *a,
 532        *b,
 533        *c,
 534        *d,
 535        *e,
 536        *f,
 537        *g,
 538        *h,
 539        *i,
 540        *j;
 541 {
 542     padvise (what, LOG_ERR, fmt, a, b, c, d, e, f, g, h, i, j);
 543     _exit (1);
 544 }
 545
 546 /* \f */
 547
 548 /* VARARGS3 */
 549
 550 void    padvise (what, code, fmt, a, b, c, d, e, f, g, h, i, j)
 551 char   *what,
 552        *fmt,
 553        *a,
 554        *b,
 555        *c,
 556        *d,
 557        *e,
 558        *f,
 559        *g,
 560        *h,
 561        *i,
 562        *j;
 563 int     code;
 564 {
 565     int     eindex = errno;
 566     char    buffer[BUFSIZ];
 567
 568     (void) sprintf (buffer, fmt, a, b, c, d, e, f, g, h, i, j);
 569     if (what)
 570         if (eindex > 0 && eindex < sys_nerr)
 571             syslog (code, "%s %s: %s", buffer, what, sys_errlist[eindex]);
 572         else
 573             syslog (code, "%s %s: Error %d", buffer, what, eindex);
 574     else
 575         syslog (code, "%s", buffer);
 576
 577     if (debug) {
 578         fprintf (stderr, "[%d] %s", code, buffer);
 579         if (what)
 580             (void) fputc (' ', stderr), perror (what);
 581         else
 582             (void) fputc ('\n', stderr);
 583         (void) fflush (stderr);
 584     }
 585
 586     errno = eindex;
 587 }
 588 @
 589
 590
 591 1.15
 592 log
 593 @BSD44
 594 case in gethostbyaddr
 595 typo
 596 @
 597 text
 598 @d3 1
 599 a3 1
 600 static char ident[] = "@@(#)$Id: popd.c,v 1.14 1992/12/16 22:31:20 jromine Exp jromine $";
 601 d61 1
 602 a63 1
 603 #ifndef BSD44           /* const */
 604 @
 605
 606
 607 1.14
 608 log
 609 @TYPESIG fixups
 610 @
 611 text
 612 @d3 1
 613 a3 1
 614 static char ident[] = "@@(#)$Id: popd.c,v 1.13 1992/12/15 00:20:22 jromine Exp jromine $";
 615 d63 1
 616 d65 1
 617 d263 1
 618 a263 1
 619     hp = gethostbyaddr (addr, sizeof *addr, sin -> sin_family);
 620 d415 2
 621 a417 2
 622 #else
 623     union wait status;
 624 @
 625
 626
 627 1.13
 628 log
 629 @endif sugar
 630 @
 631 text
 632 @d3 1
 633 a3 1
 634 static char ident[] = "@@(#)$Id: popd.c,v 1.12 1992/12/14 17:11:17 jromine Exp jromine $";
 635 d86 1
 636 a86 1
 637 static int      chldser ();
 638 d407 1
 639 a407 1
 640 static int chldser (sig, code, sc)
 641 @
 642
 643
 644 1.12
 645 log
 646 @WAITINT ifdef
 647 @
 648 text
 649 @d3 2
 650 a4 2
 651 static char ident[] = "@@(#)$Id: popd.c,v 1.11 1992/11/11 22:26:33 jromine Exp jromine $";
 652 #endif  lint
 653 d165 1
 654 a165 1
 655 #else   BSD43
 656 d167 1
 657 a167 1
 658 #endif  BSD43
 659 d169 1
 660 a169 1
 661 #endif  RESTART
 662 d181 1
 663 a181 1
 664 #else   BSD43
 665 d187 1
 666 a187 1
 667 #endif  BSD43
 668 d193 1
 669 a193 1
 670 #endif  SIGCHLD
 671 d198 1
 672 a198 1
 673 #endif  FAST
 674 d212 1
 675 a212 1
 676 #endif  FAST
 677 d219 1
 678 a219 1
 679 #endif  SIGCHLD
 680 d256 1
 681 a256 1
 682 #else   BSD43
 683 d258 1
 684 a258 1
 685 #endif  BSD43
 686 d315 1
 687 a315 1
 688 #else   BSD42
 689 d317 1
 690 a317 1
 691 #endif  BSD42
 692 d377 1
 693 a377 1
 694 #endif  TIOCNOTTY
 695 d390 1
 696 a390 1
 697 #else   BSD43
 698 d392 1
 699 a392 1
 700 #endif  BSD43
 701 @
 702
 703
 704 1.11
 705 log
 706 @use union wait only on BSD42
 707 @
 708 text
 709 @d3 1
 710 a3 1
 711 static char ident[] = "@@(#)$Id: popd.c,v 1.10 1992/02/11 18:55:11 jromine Exp jromine $";
 712 d128 1
 713 d130 3
 714 d412 3
 715 a414 1
 716 #ifdef  BSD42
 717 a415 2
 718 #else
 719     int status;
 720 @
 721
 722
 723 1.10
 724 log
 725 @use _NFILE for #fds #ifndef BSD42
 726 @
 727 text
 728 @d3 1
 729 a3 1
 730 static char ident[] = "@@(#)$Id: popd.c,v 1.9 1992/01/31 22:02:30 jromine Exp jromine $";
 731 d408 1
 732 d410 3
 733 @
 734
 735
 736 1.9
 737 log
 738 @kerberos
 739 @
 740 text
 741 @d3 1
 742 a3 1
 743 static char ident[] = "@@(#)$Id: popd.c,v 1.8 90/04/09 09:45:09 sources Exp Locker: sources $";
 744 d309 3
 745 d313 1
 746 @
 747
 748
 749 1.8
 750 log
 751 @POPSERVICE define
 752 @
 753 text
 754 @d3 1
 755 a3 1
 756 static char ident[] = "@@(#)$Id: popd.c,v 1.7 90/04/05 15:34:33 sources Exp Locker: sources $";
 757 d24 1
 758 a24 1
 759 #endif  NOIOCTLH
 760 d30 1
 761 a30 1
 762 #endif  SIGTSTP
 763 d34 7
 764 d43 1
 765 a43 1
 766 #endif  SYS5
 767 d48 1
 768 a48 1
 769 #endif  SYS5
 770 d82 3
 771 d99 3
 772 d108 1
 773 d110 5
 774 d120 1
 775 d124 1
 776 d191 1
 777 d195 1
 778 d205 1
 779 d209 1
 780 d226 3
 781 d240 8
 782 d260 5
 783 a264 3
 784
 785     (void) dup2 (fd, 0);
 786     (void) close (fd);
 787 d267 20
 788 d289 1
 789 d303 1
 790 a303 1
 791     if (myname == NULL || *myname == NULL)
 792 d337 1
 793 d376 1
 794 d393 2
 795 d410 2
 796 a411 1
 797 #endif  SIGCHLD
 798 @
 799
 800
 801 1.7
 802 log
 803 @add ID
 804 @
 805 text
 806 @d3 1
 807 a3 1
 808 static char ident[] = "@@(#)$Id:$";
 809 d63 3
 810 d70 1
 811 a70 1
 812 static char *myservice = "pop";
 813 @
 814
 815
 816 1.6
 817 log
 818 @add ID
 819 @
 820 text
 821 @d3 1
 822 a3 1
 823 static char ident[] = "@@(#)$Id:";
 824 @
 825
 826
 827 1.5
 828 log
 829 @ANSI Compilance
 830 @
 831 text
 832 @d2 3
 833 @
 834
 835
 836 1.4
 837 log
 838 @*** empty log message ***
 839 @
 840 text
 841 @d70 1
 842 a70 1
 843 int     chldser ();
 844 d73 1
 845 @
 846
 847
 848 1.3
 849 log
 850 @SYS5 fixes
 851 @
 852 text
 853 @d19 1
 854 d21 1
 855 @
 856
 857
 858 1.2
 859 log
 860 @SYS5 fix
 861 @
 862 text
 863 @d15 2
 864 a16 2
 865 #include <strings.h>
 866 #include <syslog.h>
 867 d22 1
 868 d25 1
 869 d157 1
 870 d159 1
 871 d179 1
 872 d181 1
 873 d298 1
 874 d300 1
 875 d325 2
 876 d337 2
 877 @
 878
 879
 880 1.1
 881 log
 882 @Initial revision
 883 @
 884 text
 885 @d27 3
 886 d31 4
 887 @