citadel/sysdep.c

   1 /*
   2  * Citadel "system dependent" stuff.
   3  *
   4  * Here's where we (hopefully) have most parts of the Citadel server that
   5  * would need to be altered to run the server in a non-POSIX environment.
   6  *
   7  * If we ever port to a different platform and either have multiple
   8  * variants of this file or simply load it up with #ifdefs.
   9  *
  10  * Copyright (c) 1987-2011 by the citadel.org team
  11  *
  12  * This program is open source software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 3 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  */
  26
  27 #include "sysdep.h"
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <stdio.h>
  31 #include <fcntl.h>
  32 #include <ctype.h>
  33 #include <signal.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/wait.h>
  37 #include <sys/socket.h>
  38 #include <syslog.h>
  39 #include <sys/syslog.h>
  40
  41 #if TIME_WITH_SYS_TIME
  42 # include <sys/time.h>
  43 # include <time.h>
  44 #else
  45 # if HAVE_SYS_TIME_H
  46 #  include <sys/time.h>
  47 # else
  48 #  include <time.h>
  49 # endif
  50 #endif
  51
  52 #include <limits.h>
  53 #include <sys/resource.h>
  54 #include <netinet/in.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57 #include <netdb.h>
  58 #include <sys/un.h>
  59 #include <string.h>
  60 #include <pwd.h>
  61 #include <errno.h>
  62 #include <stdarg.h>
  63 #include <grp.h>
  64 #define SHOW_ME_VAPPEND_PRINTF
  65 #include <libcitadel.h>
  66 #include "citadel.h"
  67 #include "server.h"
  68 #include "sysdep_decls.h"
  69 #include "citserver.h"
  70 #include "support.h"
  71 #include "config.h"
  72 #include "database.h"
  73 #include "housekeeping.h"
  74 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
  75 #include "ecrash.h"
  76 #include "context.h"
  77
  78 #ifdef HAVE_SYS_SELECT_H
  79 #include <sys/select.h>
  80 #endif
  81
  82 #ifndef HAVE_SNPRINTF
  83 #include "snprintf.h"
  84 #endif
  85
  86 #include "ctdl_module.h"
  87 #include "threads.h"
  88 #include "user_ops.h"
  89 #include "control.h"
  90
  91
  92 /*
  93  * Signal handler to shut down the server.
  94  */
  95
  96 volatile int exit_signal = 0;
  97 volatile int shutdown_and_halt = 0;
  98 volatile int restart_server = 0;
  99 volatile int running_as_daemon = 0;
 100
 101 static RETSIGTYPE signal_cleanup(int signum) {
 102         syslog(LOG_DEBUG, "Caught signal %d; shutting down.", signum);
 103         exit_signal = signum;
 104         server_shutting_down = 1;
 105 }
 106
 107 static RETSIGTYPE signal_exit(int signum) {
 108         exit(1);
 109 }
 110
 111
 112
 113 /*
 114  * Some initialization stuff...
 115  */
 116 void init_sysdep(void) {
 117         sigset_t set;
 118
 119         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 120 #ifdef FD_SETSIZE
 121 #ifdef RLIMIT_NOFILE
 122         struct rlimit rl;
 123         getrlimit(RLIMIT_NOFILE, &rl);
 124         rl.rlim_cur = FD_SETSIZE;
 125         rl.rlim_max = FD_SETSIZE;
 126         setrlimit(RLIMIT_NOFILE, &rl);
 127 #endif
 128 #endif
 129
 130         /* If we've got OpenSSL, we're going to use it. */
 131 #ifdef HAVE_OPENSSL
 132         init_ssl();
 133 #endif
 134
 135         /*
 136          * Set up a place to put thread-specific data.
 137          * We only need a single pointer per thread - it points to the
 138          * CitContext structure (in the ContextList linked list) of the
 139          * session to which the calling thread is currently bound.
 140          */
 141         if (pthread_key_create(&MyConKey, NULL) != 0) {
 142                 syslog(LOG_CRIT, "Can't create TSD key: %s", strerror(errno));
 143         }
 144
 145         /*
 146          * Interript, hangup, and terminate signals should cause the server
 147          * to gracefully clean up and shut down.
 148          */
 149         sigemptyset(&set);
 150         sigaddset(&set, SIGINT);
 151         sigaddset(&set, SIGHUP);
 152         sigaddset(&set, SIGTERM);
 153         sigprocmask(SIG_UNBLOCK, &set, NULL);
 154
 155         signal(SIGINT, signal_cleanup);
 156         signal(SIGHUP, signal_cleanup);
 157         signal(SIGTERM, signal_cleanup);
 158         signal(SIGUSR2, signal_exit);
 159
 160         /*
 161          * Do not shut down the server on broken pipe signals, otherwise the
 162          * whole Citadel service would come down whenever a single client
 163          * socket breaks.
 164          */
 165         signal(SIGPIPE, SIG_IGN);
 166 }
 167
 168
 169 /*
 170  * This is a generic function to set up a master socket for listening on
 171  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 172  *
 173  * ip_addr      IP address to bind
 174  * port_number  port number to bind
 175  * queue_len    number of incoming connections to allow in the queue
 176  */
 177 int ctdl_tcp_server(char *ip_addr, int port_number, int queue_len, char *errormessage)
 178 {
 179         struct protoent *p;
 180         struct sockaddr_in6 sin6;
 181         struct sockaddr_in sin4;
 182         int s, i, b;
 183         int ip_version = 6;
 184
 185         memset(&sin6, 0, sizeof(sin6));
 186         memset(&sin4, 0, sizeof(sin4));
 187         sin6.sin6_family = AF_INET6;
 188         sin4.sin_family = AF_INET;
 189
 190         if (    (ip_addr == NULL)                                                       /* any IPv6 */
 191                 || (IsEmptyStr(ip_addr))
 192                 || (!strcmp(ip_addr, "*"))
 193         ) {
 194                 ip_version = 6;
 195                 sin6.sin6_addr = in6addr_any;
 196         }
 197         else if (!strcmp(ip_addr, "0.0.0.0"))                                           /* any IPv4 */
 198         {
 199                 ip_version = 4;
 200                 sin4.sin_addr.s_addr = INADDR_ANY;
 201         }
 202         else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                     /* specific IPv4 */
 203         {
 204                 ip_version = 4;
 205                 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
 206                         snprintf(errormessage, SIZ,
 207                                  "Error binding to [%s] : %s", ip_addr, strerror(errno)
 208                         );
 209                         syslog(LOG_ALERT, "%s", errormessage);
 210                         return (-1);
 211                 }
 212         }
 213         else                                                                            /* specific IPv6 */
 214         {
 215                 ip_version = 6;
 216                 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
 217                         snprintf(errormessage, SIZ,
 218                                  "Error binding to [%s] : %s", ip_addr, strerror(errno)
 219                         );
 220                         syslog(LOG_ALERT, "%s", errormessage);
 221                         return (-1);
 222                 }
 223         }
 224
 225         if (port_number == 0) {
 226                 snprintf(errormessage, SIZ, "Can't start: no port number specified.");
 227                 syslog(LOG_ALERT, "%s", errormessage);
 228                 return (-1);
 229         }
 230         sin6.sin6_port = htons((u_short) port_number);
 231         sin4.sin_port = htons((u_short) port_number);
 232
 233         p = getprotobyname("tcp");
 234
 235         s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
 236         if (s < 0) {
 237                 snprintf(errormessage, SIZ,
 238                          "Can't create a listening socket: %s", strerror(errno)
 239                 );
 240                 syslog(LOG_ALERT, "%s", errormessage);
 241                 return (-1);
 242         }
 243         /* Set some socket options that make sense. */
 244         i = 1;
 245         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 246
 247         if (ip_version == 6) {
 248                 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
 249         }
 250         else {
 251                 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
 252         }
 253
 254         if (b < 0) {
 255                 snprintf(errormessage, SIZ,
 256                          "Can't bind: %s", strerror(errno)
 257                 );
 258                 syslog(LOG_ALERT, "%s", errormessage);
 259                 return (-1);
 260         }
 261
 262         fcntl(s, F_SETFL, O_NONBLOCK);
 263
 264         if (listen(s, ((queue_len >= 5) ? queue_len : 5) ) < 0) {
 265                 snprintf(errormessage, SIZ,
 266                          "Can't listen: %s", strerror(errno)
 267                 );
 268                 syslog(LOG_ALERT, "%s", errormessage);
 269                 return (-1);
 270         }
 271         return (s);
 272 }
 273
 274
 275
 276
 277
 278 /*
 279  * Create a Unix domain socket and listen on it
 280  */
 281 int ctdl_uds_server(char *sockpath, int queue_len, char *errormessage)
 282 {
 283         struct sockaddr_un addr;
 284         int s;
 285         int i;
 286         int actual_queue_len;
 287 #ifdef HAVE_STRUCT_UCRED
 288         int passcred = 1;
 289 #endif
 290
 291         actual_queue_len = queue_len;
 292         if (actual_queue_len < 5) actual_queue_len = 5;
 293
 294         i = unlink(sockpath);
 295         if ((i != 0) && (errno != ENOENT)) {
 296                 snprintf(errormessage, SIZ, "citserver: can't unlink %s: %s",
 297                         sockpath, strerror(errno)
 298                 );
 299                 syslog(LOG_EMERG, "%s", errormessage);
 300                 return(-1);
 301         }
 302
 303         memset(&addr, 0, sizeof(addr));
 304         addr.sun_family = AF_UNIX;
 305         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 306
 307         s = socket(AF_UNIX, SOCK_STREAM, 0);
 308         if (s < 0) {
 309                 snprintf(errormessage, SIZ,
 310                          "citserver: Can't create a socket: %s",
 311                          strerror(errno));
 312                 syslog(LOG_EMERG, "%s", errormessage);
 313                 return(-1);
 314         }
 315
 316         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 317                 snprintf(errormessage, SIZ,
 318                          "citserver: Can't bind: %s",
 319                          strerror(errno));
 320                 syslog(LOG_EMERG, "%s", errormessage);
 321                 return(-1);
 322         }
 323
 324         /* set to nonblock - we need this for some obscure situations */
 325         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 326                 snprintf(errormessage, SIZ,
 327                          "citserver: Can't set socket to non-blocking: %s",
 328                          strerror(errno));
 329                 syslog(LOG_EMERG, "%s", errormessage);
 330                 close(s);
 331                 return(-1);
 332         }
 333
 334         if (listen(s, actual_queue_len) < 0) {
 335                 snprintf(errormessage, SIZ,
 336                          "citserver: Can't listen: %s",
 337                          strerror(errno));
 338                 syslog(LOG_EMERG, "%s", errormessage);
 339                 return(-1);
 340         }
 341
 342 #ifdef HAVE_STRUCT_UCRED
 343         setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
 344 #endif
 345
 346         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 347         return(s);
 348 }
 349
 350
 351
 352 /*
 353  * The following functions implement output buffering on operating systems which
 354  * support it (such as Linux and various BSD flavors).
 355  */
 356 #ifndef HAVE_DARWIN
 357 #ifdef TCP_CORK
 358 #       define HAVE_TCP_BUFFERING
 359 #else
 360 #       ifdef TCP_NOPUSH
 361 #               define HAVE_TCP_BUFFERING
 362 #               define TCP_CORK TCP_NOPUSH
 363 #       endif
 364 #endif /* TCP_CORK */
 365 #endif /* HAVE_DARWIN */
 366
 367 static unsigned on = 1, off = 0;
 368
 369 void buffer_output(void) {
 370 #ifdef HAVE_TCP_BUFFERING
 371 #ifdef HAVE_OPENSSL
 372         if (!CC->redirect_ssl)
 373 #endif
 374                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 375 #endif
 376 }
 377
 378 void unbuffer_output(void) {
 379 #ifdef HAVE_TCP_BUFFERING
 380 #ifdef HAVE_OPENSSL
 381         if (!CC->redirect_ssl)
 382 #endif
 383                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 384 #endif
 385 }
 386
 387 void flush_output(void) {
 388 #ifdef HAVE_TCP_BUFFERING
 389         struct CitContext *CCC = CC;
 390         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 391         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 392 #endif
 393 }
 394
 395 /*
 396 static void flush_client_inbuf(void)
 397 {
 398         CitContext *CCC=CC;
 399
 400         FlushStrBuf(CCC->ReadBuf);
 401         CCC->Pos = NULL;
 402
 403 }
 404 */
 405
 406
 407 /*
 408  * client_close()       ...     close the client socket
 409  */
 410 void client_close(void) {
 411         CitContext *CCC = CC;
 412
 413         if (!CCC) return;
 414         if (CCC->client_socket < 0) return;
 415         syslog(LOG_DEBUG, "Closing socket %d", CCC->client_socket);
 416         close(CCC->client_socket);
 417         CCC->client_socket = -1 ;
 418 }
 419
 420
 421
 422
 423 /*
 424  * client_write()   ...    Send binary data to the client.
 425  */
 426 int client_write(const char *buf, int nbytes)
 427 {
 428         int bytes_written = 0;
 429         int retval;
 430 #ifndef HAVE_TCP_BUFFERING
 431         int old_buffer_len = 0;
 432 #endif
 433         fd_set wset;
 434         CitContext *Ctx;
 435         int fdflags;
 436
 437         if (nbytes < 1) return(0);
 438
 439         Ctx = CC;
 440
 441 #ifdef BIGBAD_IODBG
 442         {
 443                 int rv = 0;
 444                 char fn [SIZ];
 445                 FILE *fd;
 446
 447                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", Ctx->ServiceName, Ctx->cs_pid);
 448
 449                 fd = fopen(fn, "a+");
 450                 fprintf(fd, "Sending: BufSize: %d BufContent: [",
 451                         nbytes);
 452                 rv = fwrite(buf, nbytes, 1, fd);
 453                 fprintf(fd, "]\n");
 454
 455
 456                 fclose(fd);
 457         }
 458 #endif
 459 //      flush_client_inbuf();
 460         if (Ctx->redirect_buffer != NULL) {
 461                 StrBufAppendBufPlain(Ctx->redirect_buffer,
 462                                      buf, nbytes, 0);
 463                 return 0;
 464         }
 465
 466 #ifdef HAVE_OPENSSL
 467         if (Ctx->redirect_ssl) {
 468                 client_write_ssl(buf, nbytes);
 469                 return 0;
 470         }
 471 #endif
 472         if (Ctx->client_socket == -1) return -1;
 473
 474         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 475
 476         while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
 477                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 478                         FD_ZERO(&wset);
 479                         FD_SET(Ctx->client_socket, &wset);
 480                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 481                                 if (errno == EINTR)
 482                                 {
 483                                         syslog(LOG_DEBUG, "client_write(%d bytes) select() interrupted.",
 484                                                 nbytes-bytes_written
 485                                         );
 486                                         if (server_shutting_down) {
 487                                                 CC->kill_me = KILLME_SELECT_INTERRUPTED;
 488                                                 return (-1);
 489                                         } else {
 490                                                 /* can't trust fd's and stuff so we need to re-create them */
 491                                                 continue;
 492                                         }
 493                                 } else {
 494                                         syslog(LOG_ERR,
 495                                                 "client_write(%d bytes) select failed: %s (%d)",
 496                                                 nbytes - bytes_written,
 497                                                 strerror(errno), errno
 498                                         );
 499                                         cit_backtrace();
 500                                         client_close();
 501                                         Ctx->kill_me = KILLME_SELECT_FAILED;
 502                                         return -1;
 503                                 }
 504                         }
 505                 }
 506
 507                 retval = write(Ctx->client_socket, &buf[bytes_written], nbytes - bytes_written);
 508                 if (retval < 1) {
 509                         syslog(LOG_ERR,
 510                                 "client_write(%d bytes) failed: %s (%d)",
 511                                 nbytes - bytes_written,
 512                                 strerror(errno), errno
 513                         );
 514                         cit_backtrace();
 515                         client_close();
 516                         Ctx->kill_me = KILLME_WRITE_FAILED;
 517                         return -1;
 518                 }
 519                 bytes_written = bytes_written + retval;
 520         }
 521         return 0;
 522 }
 523
 524 void cputbuf(const StrBuf *Buf) {
 525         client_write(ChrPtr(Buf), StrLength(Buf));
 526 }
 527
 528
 529 /*
 530  * cprintf()    Send formatted printable data to the client.
 531  *              Implemented in terms of client_write() so it's technically not sysdep...
 532  */
 533 void cprintf(const char *format, ...) {
 534         va_list arg_ptr;
 535         char buf[1024];
 536
 537         va_start(arg_ptr, format);
 538         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 539                 buf[sizeof buf - 2] = '\n';
 540         client_write(buf, strlen(buf));
 541         va_end(arg_ptr);
 542 }
 543
 544
 545 /*
 546  * Read data from the client socket.
 547  *
 548  * sock         socket fd to read from
 549  * buf          buffer to read into
 550  * bytes        number of bytes to read
 551  * timeout      Number of seconds to wait before timing out
 552  *
 553  * Possible return values:
 554  *      1       Requested number of bytes has been read.
 555  *      0       Request timed out.
 556  *      -1      Connection is broken, or other error.
 557  */
 558 int client_read_blob(StrBuf *Target, int bytes, int timeout)
 559 {
 560         CitContext *CCC=CC;
 561         const char *Error;
 562         int retval = 0;
 563
 564 #ifdef HAVE_OPENSSL
 565         if (CCC->redirect_ssl) {
 566 #ifdef BIGBAD_IODBG
 567                 int rv = 0;
 568                 char fn [SIZ];
 569                 FILE *fd;
 570
 571                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 572
 573                 fd = fopen(fn, "a+");
 574                 fprintf(fd, "Reading BLOB: BufSize: %d ",
 575                         bytes);
 576                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 577                 fprintf(fd, "]\n");
 578
 579
 580                 fclose(fd);
 581 #endif
 582                 retval = client_read_sslblob(Target, bytes, timeout);
 583                 if (retval < 0) {
 584                         syslog(LOG_CRIT, "client_read_blob() failed");
 585                 }
 586 #ifdef BIGBAD_IODBG
 587                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 588
 589                 fd = fopen(fn, "a+");
 590                 fprintf(fd, "Read: %d BufContent: [",
 591                         StrLength(Target));
 592                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 593                 fprintf(fd, "]\n");
 594
 595
 596                 fclose(fd);
 597 #endif
 598         }
 599         else
 600 #endif
 601         {
 602 #ifdef BIGBAD_IODBG
 603                 int rv = 0;
 604                 char fn [SIZ];
 605                 FILE *fd;
 606
 607                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 608
 609                 fd = fopen(fn, "a+");
 610                 fprintf(fd, "Reading BLOB: BufSize: %d ",
 611                         bytes);
 612                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 613                 fprintf(fd, "]\n");
 614
 615
 616                 fclose(fd);
 617 #endif
 618                 retval = StrBufReadBLOBBuffered(Target,
 619                                                 CCC->ReadBuf,
 620                                                 &CCC->Pos,
 621                                                 &CCC->client_socket,
 622                                                 1,
 623                                                 bytes,
 624                                                 O_TERM,
 625                                                 &Error);
 626                 if (retval < 0) {
 627                         syslog(LOG_CRIT, "client_read_blob() failed: %s", Error);
 628                         client_close();
 629                         return retval;
 630                 }
 631 #ifdef BIGBAD_IODBG
 632                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 633
 634                 fd = fopen(fn, "a+");
 635                 fprintf(fd, "Read: %d BufContent: [",
 636                         StrLength(Target));
 637                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 638                 fprintf(fd, "]\n");
 639                 fclose(fd);
 640 #endif
 641         }
 642         return retval;
 643 }
 644
 645
 646 /*
 647  * to make client_read_random_blob() more efficient, increase buffer size.
 648  * just use in greeting function, else your buffer may be flushed
 649  */
 650 void client_set_inbound_buf(long N)
 651 {
 652         FlushStrBuf(CC->ReadBuf);
 653         ReAdjustEmptyBuf(CC->ReadBuf, N * SIZ, N * SIZ);
 654 }
 655
 656 int client_read_random_blob(StrBuf *Target, int timeout)
 657 {
 658         CitContext *CCC=CC;
 659         int rc;
 660
 661         rc =  client_read_blob(Target, 1, timeout);
 662         if (rc > 0)
 663         {
 664                 long len;
 665                 const char *pch;
 666
 667                 len = StrLength(CCC->ReadBuf);
 668                 pch = ChrPtr(CCC->ReadBuf);
 669
 670                 if (len > 0)
 671                 {
 672                         if (CCC->Pos != NULL) {
 673                                 len -= CCC->Pos - pch;
 674                                 pch = CCC->Pos;
 675                         }
 676                         StrBufAppendBufPlain(Target, pch, len, 0);
 677                         FlushStrBuf(CCC->ReadBuf);
 678                         CCC->Pos = NULL;
 679 #ifdef BIGBAD_IODBG
 680                         {
 681                                 int rv = 0;
 682                                 char fn [SIZ];
 683                                 FILE *fd;
 684
 685                                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 686
 687                                 fd = fopen(fn, "a+");
 688                                 fprintf(fd, "Read: BufSize: %d BufContent: [",
 689                                         StrLength(Target));
 690                                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 691                                 fprintf(fd, "]\n");
 692
 693
 694                                 fclose(fd);
 695                         }
 696 #endif
 697
 698                         return StrLength(Target);
 699                 }
 700                 return rc;
 701         }
 702         else
 703                 return rc;
 704 }
 705
 706 int client_read_to(char *buf, int bytes, int timeout)
 707 {
 708         CitContext *CCC=CC;
 709         int rc;
 710
 711         rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
 712         if (rc < 0)
 713         {
 714                 *buf = '\0';
 715                 return rc;
 716         }
 717         else
 718         {
 719                 memcpy(buf,
 720                        ChrPtr(CCC->MigrateBuf),
 721                        StrLength(CCC->MigrateBuf) + 1);
 722                 FlushStrBuf(CCC->MigrateBuf);
 723                 return rc;
 724         }
 725 }
 726
 727
 728 int HaveMoreLinesWaiting(CitContext *CCC)
 729 {
 730         if ((CCC->kill_me != 0) || (
 731             (CCC->Pos == NULL) &&
 732             (StrLength(CCC->ReadBuf) == 0) &&
 733             (CCC->client_socket != -1)) )
 734                 return 0;
 735         else
 736                 return 1;
 737 }
 738
 739
 740 /*
 741  * Read data from the client socket with default timeout.
 742  * (This is implemented in terms of client_read_to() and could be
 743  * justifiably moved out of sysdep.c)
 744  */
 745 INLINE int client_read(char *buf, int bytes)
 746 {
 747         return(client_read_to(buf, bytes, config.c_sleeping));
 748 }
 749
 750 int CtdlClientGetLine(StrBuf *Target)
 751 {
 752         CitContext *CCC=CC;
 753         const char *Error;
 754         int rc;
 755
 756         FlushStrBuf(Target);
 757 #ifdef HAVE_OPENSSL
 758         if (CCC->redirect_ssl) {
 759 #ifdef BIGBAD_IODBG
 760                 char fn [SIZ];
 761                 FILE *fd;
 762                 int len = 0;
 763                 int rlen = 0;
 764                 int  nlen = 0;
 765                 int nrlen = 0;
 766                 const char *pch;
 767
 768                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 769
 770                 fd = fopen(fn, "a+");
 771                 pch = ChrPtr(CCC->ReadBuf);
 772                 len = StrLength(CCC->ReadBuf);
 773                 if (CCC->Pos != NULL)
 774                         rlen = CC->Pos - pch;
 775                 else
 776                         rlen = 0;
 777
 778 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 779                         len, rlen, pch);
 780 */
 781                 fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
 782                         len, rlen);
 783 #endif
 784                 rc = client_readline_sslbuffer(Target,
 785                                                CCC->ReadBuf,
 786                                                &CCC->Pos,
 787                                                1);
 788 #ifdef BIGBAD_IODBG
 789                 pch = ChrPtr(CCC->ReadBuf);
 790                 nlen = StrLength(CCC->ReadBuf);
 791                 if (CCC->Pos != NULL)
 792                         nrlen = CC->Pos - pch;
 793                 else
 794                         nrlen = 0;
 795 /*
 796                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 797                         len, nlen, rlen, nrlen, pch);
 798 */
 799                 fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 800                         len, nlen, rlen, nrlen);
 801
 802                 fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 803                         StrLength(Target), ChrPtr(Target));
 804                 fclose(fd);
 805
 806                 if (rc < 0) {
 807                         syslog(LOG_CRIT, "CtdlClientGetLine() failed");
 808                 }
 809 #endif
 810                 return rc;
 811         }
 812         else
 813 #endif
 814         {
 815 #ifdef BIGBAD_IODBG
 816                 char fn [SIZ];
 817                 FILE *fd;
 818                 int len, rlen, nlen, nrlen;
 819                 const char *pch;
 820
 821                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 822
 823                 fd = fopen(fn, "a+");
 824                 pch = ChrPtr(CCC->ReadBuf);
 825                 len = StrLength(CCC->ReadBuf);
 826                 if (CCC->Pos != NULL)
 827                         rlen = CC->Pos - pch;
 828                 else
 829                         rlen = 0;
 830
 831 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 832                         len, rlen, pch);
 833 */
 834                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 835                         len, rlen);
 836 #endif
 837                 rc = StrBufTCP_read_buffered_line_fast(Target,
 838                                                        CCC->ReadBuf,
 839                                                        &CCC->Pos,
 840                                                        &CCC->client_socket,
 841                                                        5,
 842                                                        1,
 843                                                        &Error);
 844
 845 #ifdef BIGBAD_IODBG
 846                 pch = ChrPtr(CCC->ReadBuf);
 847                 nlen = StrLength(CCC->ReadBuf);
 848                 if (CCC->Pos != NULL)
 849                         nrlen = CC->Pos - pch;
 850                 else
 851                         nrlen = 0;
 852 /*
 853                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 854                         len, nlen, rlen, nrlen, pch);
 855 */
 856                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 857                         len, nlen, rlen, nrlen);
 858
 859                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 860                         StrLength(Target), ChrPtr(Target));
 861                 fclose(fd);
 862
 863                 if ((rc < 0) && (Error != NULL)) {
 864                         syslog(LOG_CRIT, "CtdlClientGetLine() failed: %s", Error);
 865                 }
 866 #endif
 867                 return rc;
 868         }
 869 }
 870
 871
 872 /*
 873  * client_getln()   ...   Get a LF-terminated line of text from the client.
 874  * (This is implemented in terms of client_read() and could be
 875  * justifiably moved out of sysdep.c)
 876  */
 877 int client_getln(char *buf, int bufsize)
 878 {
 879         int i, retval;
 880         CitContext *CCC=CC;
 881         const char *pCh;
 882
 883         retval = CtdlClientGetLine(CCC->MigrateBuf);
 884         if (retval < 0)
 885           return(retval >= 0);
 886
 887
 888         i = StrLength(CCC->MigrateBuf);
 889         pCh = ChrPtr(CCC->MigrateBuf);
 890         /* Strip the trailing LF, and the trailing CR if present.
 891          */
 892         if (bufsize <= i)
 893                 i = bufsize - 1;
 894         while ( (i > 0)
 895                 && ( (pCh[i - 1]==13)
 896                      || ( pCh[i - 1]==10)) ) {
 897                 i--;
 898         }
 899         memcpy(buf, pCh, i);
 900         buf[i] = 0;
 901
 902         FlushStrBuf(CCC->MigrateBuf);
 903         if (retval < 0) {
 904                 safestrncpy(&buf[i], "000", bufsize - i);
 905         }
 906         return(retval >= 0);
 907 }
 908
 909
 910 /*
 911  * Cleanup any contexts that are left lying around
 912  */
 913
 914
 915 void close_masters (void)
 916 {
 917         struct ServiceFunctionHook *serviceptr;
 918
 919         /*
 920          * close all protocol master sockets
 921          */
 922         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 923             serviceptr = serviceptr->next ) {
 924
 925                 if (serviceptr->tcp_port > 0)
 926                 {
 927                         syslog(LOG_INFO, "Closing listener on port %d\n",
 928                                 serviceptr->tcp_port);
 929                         serviceptr->tcp_port = 0;
 930                 }
 931
 932                 if (serviceptr->sockpath != NULL)
 933                         syslog(LOG_INFO, "Closing listener on '%s'\n",
 934                                 serviceptr->sockpath);
 935
 936                 close(serviceptr->msock);
 937                 /* If it's a Unix domain socket, remove the file. */
 938                 if (serviceptr->sockpath != NULL) {
 939                         unlink(serviceptr->sockpath);
 940                         serviceptr->sockpath = NULL;
 941                 }
 942         }
 943 }
 944
 945
 946 /*
 947  * The system-dependent part of master_cleanup() - close the master socket.
 948  */
 949 void sysdep_master_cleanup(void) {
 950
 951         close_masters();
 952
 953         context_cleanup();
 954
 955 #ifdef HAVE_OPENSSL
 956         destruct_ssl();
 957 #endif
 958         CtdlDestroyProtoHooks();
 959         CtdlDestroyDeleteHooks();
 960         CtdlDestroyXmsgHooks();
 961         CtdlDestroyNetprocHooks();
 962         CtdlDestroyUserHooks();
 963         CtdlDestroyMessageHook();
 964         CtdlDestroyCleanupHooks();
 965         CtdlDestroyFixedOutputHooks();
 966         CtdlDestroySessionHooks();
 967         CtdlDestroyServiceHook();
 968         CtdlDestroyRoomHooks();
 969         CtdlDestroySearchHooks();
 970         #ifdef HAVE_BACKTRACE
 971 ///     eCrash_Uninit();
 972         #endif
 973 }
 974
 975
 976
 977 pid_t current_child;
 978 void graceful_shutdown(int signum) {
 979         kill(current_child, signum);
 980         unlink(file_pid_file);
 981         exit(0);
 982 }
 983
 984 int nFireUps = 0;
 985 int nFireUpsNonRestart = 0;
 986 pid_t ForkedPid = 1;
 987
 988 /*
 989  * Start running as a daemon.
 990  */
 991 void start_daemon(int unused) {
 992         int status = 0;
 993         pid_t child = 0;
 994         FILE *fp;
 995         int do_restart = 0;
 996
 997         current_child = 0;
 998
 999         /* Close stdin/stdout/stderr and replace them with /dev/null.
1000          * We don't just call close() because we don't want these fd's
1001          * to be reused for other files.
1002          */
1003         if (chdir(ctdl_run_dir) != 0)
1004                 syslog(LOG_EMERG,
1005                               "unable to change into directory [%s]: %s",
1006                               ctdl_run_dir, strerror(errno));
1007
1008         child = fork();
1009         if (child != 0) {
1010                 exit(0);
1011         }
1012
1013         signal(SIGHUP, SIG_IGN);
1014         signal(SIGINT, SIG_IGN);
1015         signal(SIGQUIT, SIG_IGN);
1016
1017         setsid();
1018         umask(0);
1019         if ((freopen("/dev/null", "r", stdin) != stdin) ||
1020             (freopen("/dev/null", "w", stdout) != stdout) ||
1021             (freopen("/dev/null", "w", stderr) != stderr))
1022                 syslog(LOG_EMERG,
1023                               "unable to reopen stdin/out/err %s",
1024                               strerror(errno));
1025
1026
1027         do {
1028                 current_child = fork();
1029
1030                 signal(SIGTERM, graceful_shutdown);
1031
1032                 if (current_child < 0) {
1033                         perror("fork");
1034                         exit(errno);
1035                 }
1036
1037                 else if (current_child == 0) {
1038                         return; /* continue starting citadel. */
1039                 }
1040
1041                 else {
1042                         fp = fopen(file_pid_file, "w");
1043                         if (fp != NULL) {
1044                                 fprintf(fp, ""F_PID_T"\n", getpid());
1045                                 fclose(fp);
1046                         }
1047                         waitpid(current_child, &status, 0);
1048                 }
1049                 do_restart = 0;
1050                 nFireUpsNonRestart = nFireUps;
1051
1052                 /* Exit code 0 means the watcher should exit */
1053                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
1054                         do_restart = 0;
1055                 }
1056
1057                 /* Exit code 101-109 means the watcher should exit */
1058                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
1059                         do_restart = 0;
1060                 }
1061
1062                 /* Any other exit code, or no exit code, means we should restart. */
1063                 else {
1064                         do_restart = 1;
1065                         nFireUps++;
1066                         ForkedPid = current_child;
1067                 }
1068
1069         } while (do_restart);
1070
1071         unlink(file_pid_file);
1072         exit(WEXITSTATUS(status));
1073 }
1074
1075
1076
1077 void checkcrash(void)
1078 {
1079         if (nFireUpsNonRestart != nFireUps)
1080         {
1081                 StrBuf *CrashMail;
1082
1083                 CrashMail = NewStrBuf();
1084                 syslog(LOG_ALERT, "Posting crash message\n");
1085                 StrBufPrintf(CrashMail,
1086                         " \n"
1087                         " The Citadel server process (citserver) terminated unexpectedly."
1088                         "\n \n"
1089                         " This could be the result of a bug in the server program, or some external "
1090                         "factor.\n \n"
1091                         " You can obtain more information about this by enabling core dumps.\n \n"
1092                         " For more information, please see:\n \n"
1093                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1094                         "\n \n"
1095
1096                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1097                         ,
1098                         ctdl_run_dir, ForkedPid);
1099                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1100                 FreeStrBuf(&CrashMail);
1101         }
1102 }
1103
1104
1105 /*
1106  * Generic routine to convert a login name to a full name (gecos)
1107  * Returns nonzero if a conversion took place
1108  */
1109 int convert_login(char NameToConvert[]) {
1110         struct passwd *pw;
1111         int a;
1112
1113         pw = getpwnam(NameToConvert);
1114         if (pw == NULL) {
1115                 return(0);
1116         }
1117         else {
1118                 strcpy(NameToConvert, pw->pw_gecos);
1119                 for (a=0; a<strlen(NameToConvert); ++a) {
1120                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1121                 }
1122                 return(1);
1123         }
1124 }
1125
1126
1127
1128 /*
1129  * This loop just keeps going and going and going...
1130  */
1131 void *worker_thread(void *blah) {
1132         int highest;
1133         CitContext *ptr;
1134         CitContext *bind_me = NULL;
1135         fd_set readfds;
1136         int retval = 0;
1137         struct timeval tv;
1138         int force_purge = 0;
1139         struct ServiceFunctionHook *serviceptr;
1140         int ssock;                      /* Descriptor for client socket */
1141         CitContext *con = NULL;         /* Temporary context pointer */
1142         int i;
1143
1144         ++num_workers;
1145
1146         while (!server_shutting_down) {
1147
1148                 /* make doubly sure we're not holding any stale db handles
1149                  * which might cause a deadlock.
1150                  */
1151                 cdb_check_handles();
1152 do_select:      force_purge = 0;
1153                 bind_me = NULL;         /* Which session shall we handle? */
1154
1155                 /* Initialize the fdset. */
1156                 FD_ZERO(&readfds);
1157                 highest = 0;
1158
1159                 /* First, add the various master sockets to the fdset. */
1160                 for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next ) {
1161                         FD_SET(serviceptr->msock, &readfds);
1162                         if (serviceptr->msock > highest) {
1163                                 highest = serviceptr->msock;
1164                         }
1165                 }
1166
1167                 /* Next, add all of the client sockets. */
1168                 begin_critical_section(S_SESSION_TABLE);
1169                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1170                         /* Don't select on dead sessions, only truly idle ones */
1171                         if (    (ptr->state == CON_IDLE)
1172                                 && (ptr->kill_me == 0)
1173                                 && (ptr->client_socket != -1)
1174                         ) {
1175                                 FD_SET(ptr->client_socket, &readfds);
1176                                 if (ptr->client_socket > highest)
1177                                         highest = ptr->client_socket;
1178                         }
1179                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1180                                 bind_me = ptr;
1181                                 ptr->state = CON_EXECUTING;
1182                                 break;
1183                         }
1184                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1185                                 bind_me = ptr;
1186                                 ptr->state = CON_STARTING;
1187                                 break;
1188                         }
1189                 }
1190                 end_critical_section(S_SESSION_TABLE);
1191
1192                 if (bind_me) {
1193                         goto SKIP_SELECT;
1194                 }
1195
1196                 /* If we got this far, it means that there are no sessions
1197                  * which a previous thread marked for attention, so we go
1198                  * ahead and get ready to select().
1199                  */
1200
1201                 if (!server_shutting_down) {
1202                         tv.tv_sec = 1;          /* wake up every second if no input */
1203                         tv.tv_usec = 0;
1204                         retval = select(highest + 1, &readfds, NULL, NULL, &tv);
1205                 }
1206                 else {
1207                         --num_workers;
1208                         return NULL;
1209                 }
1210
1211                 /* Now figure out who made this select() unblock.
1212                  * First, check for an error or exit condition.
1213                  */
1214                 if (retval < 0) {
1215                         if (errno == EBADF) {
1216                                 syslog(LOG_NOTICE, "select() failed: (%s)\n", strerror(errno));
1217                                 goto do_select;
1218                         }
1219                         if (errno != EINTR) {
1220                                 syslog(LOG_EMERG, "Exiting (%s)\n", strerror(errno));
1221                                 server_shutting_down = 1;
1222                                 continue;
1223                         } else {
1224                                 syslog(LOG_DEBUG, "Interrupted select()\n");
1225                                 if (server_shutting_down) {
1226                                         --num_workers;
1227                                         return(NULL);
1228                                 }
1229                                 goto do_select;
1230                         }
1231                 }
1232                 else if (retval == 0) {
1233                         if (server_shutting_down) {
1234                                 --num_workers;
1235                                 return(NULL);
1236                         }
1237                 }
1238
1239                 /* Next, check to see if it's a new client connecting * on a master socket. */
1240
1241                 else if ((retval > 0) && (!server_shutting_down)) for (serviceptr = ServiceHookTable; serviceptr != NULL; serviceptr = serviceptr->next) {
1242
1243                         if (FD_ISSET(serviceptr->msock, &readfds)) {
1244                                 ssock = accept(serviceptr->msock, NULL, 0);
1245                                 if (ssock >= 0) {
1246                                         syslog(LOG_DEBUG, "New client socket %d", ssock);
1247
1248                                         /* The master socket is non-blocking but the client
1249                                          * sockets need to be blocking, otherwise certain
1250                                          * operations barf on FreeBSD.  Not a fatal error.
1251                                          */
1252                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1253                                                 syslog(LOG_EMERG,
1254                                                         "citserver: Can't set socket to blocking: %s\n",
1255                                                         strerror(errno));
1256                                         }
1257
1258                                         /* New context will be created already
1259                                          * set up in the CON_EXECUTING state.
1260                                          */
1261                                         con = CreateNewContext();
1262
1263                                         /* Assign our new socket number to it. */
1264                                         con->client_socket = ssock;
1265                                         con->h_command_function = serviceptr->h_command_function;
1266                                         con->h_async_function = serviceptr->h_async_function;
1267                                         con->h_greeting_function = serviceptr->h_greeting_function;
1268                                         con->ServiceName = serviceptr->ServiceName;
1269
1270                                         /* Determine whether it's a local socket */
1271                                         if (serviceptr->sockpath != NULL) {
1272                                                 con->is_local_socket = 1;
1273                                         }
1274
1275                                         /* Set the SO_REUSEADDR socket option */
1276                                         i = 1;
1277                                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
1278                                         con->state = CON_GREETING;
1279                                         retval--;
1280                                         if (retval == 0)
1281                                                 break;
1282                                 }
1283                         }
1284                 }
1285
1286                 /* It must be a client socket.  Find a context that has data
1287                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1288                  * active sockets other than our chosen one are marked as
1289                  * CON_READY so the next thread that comes around can just bind
1290                  * to one without having to select() again.
1291                  */
1292                 begin_critical_section(S_SESSION_TABLE);
1293                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1294                         int checkfd = ptr->client_socket;
1295                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1296                                 if (FD_ISSET(checkfd, &readfds)) {
1297                                         ptr->input_waiting = 1;
1298                                         if (!bind_me) {
1299                                                 bind_me = ptr;  /* I choose you! */
1300                                                 bind_me->state = CON_EXECUTING;
1301                                         }
1302                                         else {
1303                                                 ptr->state = CON_READY;
1304                                         }
1305                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1306                                         if (!bind_me) {
1307                                                 bind_me = ptr;  /* I choose you! */
1308                                                 bind_me->state = CON_EXECUTING;
1309                                         }
1310                                         else {
1311                                                 ptr->state = CON_READY;
1312                                         }
1313                                 }
1314                         }
1315                 }
1316                 end_critical_section(S_SESSION_TABLE);
1317
1318 SKIP_SELECT:
1319                 /* We're bound to a session */
1320                 ++active_workers;
1321                 if (bind_me != NULL) {
1322                         become_session(bind_me);
1323
1324                         if (bind_me->state == CON_STARTING) {
1325                                 bind_me->state = CON_EXECUTING;
1326                                 begin_session(bind_me);
1327                                 bind_me->h_greeting_function();
1328                         }
1329                         /* If the client has sent a command, execute it. */
1330                         if (CC->input_waiting) {
1331                                 CC->h_command_function();
1332
1333                                 while (HaveMoreLinesWaiting(CC))
1334                                        CC->h_command_function();
1335
1336                                 CC->input_waiting = 0;
1337                         }
1338
1339                         /* If there are asynchronous messages waiting and the
1340                          * client supports it, do those now */
1341                         if ((CC->is_async) && (CC->async_waiting)
1342                            && (CC->h_async_function != NULL)) {
1343                                 CC->h_async_function();
1344                                 CC->async_waiting = 0;
1345                         }
1346
1347                         force_purge = CC->kill_me;
1348                         become_session(NULL);
1349                         bind_me->state = CON_IDLE;
1350                 }
1351
1352                 dead_session_purge(force_purge);
1353                 do_housekeeping();
1354                 --active_workers;
1355         }
1356
1357         /* If control reaches this point, the server is shutting down */
1358         --num_workers;
1359         return(NULL);
1360 }
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371 /*
1372  * SyslogFacility()
1373  * Translate text facility name to syslog.h defined value.
1374  */
1375 int SyslogFacility(char *name)
1376 {
1377         int i;
1378         struct
1379         {
1380                 int facility;
1381                 char *name;
1382         }   facTbl[] =
1383         {
1384                 {   LOG_KERN,   "kern"          },
1385                 {   LOG_USER,   "user"          },
1386                 {   LOG_MAIL,   "mail"          },
1387                 {   LOG_DAEMON, "daemon"        },
1388                 {   LOG_AUTH,   "auth"          },
1389                 {   LOG_SYSLOG, "syslog"        },
1390                 {   LOG_LPR,    "lpr"           },
1391                 {   LOG_NEWS,   "news"          },
1392                 {   LOG_UUCP,   "uucp"          },
1393                 {   LOG_LOCAL0, "local0"        },
1394                 {   LOG_LOCAL1, "local1"        },
1395                 {   LOG_LOCAL2, "local2"        },
1396                 {   LOG_LOCAL3, "local3"        },
1397                 {   LOG_LOCAL4, "local4"        },
1398                 {   LOG_LOCAL5, "local5"        },
1399                 {   LOG_LOCAL6, "local6"        },
1400                 {   LOG_LOCAL7, "local7"        },
1401                 {   0,            NULL          }
1402         };
1403         for(i = 0; facTbl[i].name != NULL; i++) {
1404                 if(!strcasecmp(name, facTbl[i].name))
1405                         return facTbl[i].facility;
1406         }
1407         return LOG_DAEMON;
1408 }