citadel/sysdep.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel "system dependent" stuff.
   5  * See copyright.txt for copyright information.
   6  *
   7  * Here's where we (hopefully) have most parts of the Citadel server that
   8  * would need to be altered to run the server in a non-POSIX environment.
   9  *
  10  * If we ever port to a different platform and either have multiple
  11  * variants of this file or simply load it up with #ifdefs.
  12  *
  13  */
  14
  15 #include "sysdep.h"
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <stdio.h>
  19 #include <fcntl.h>
  20 #include <ctype.h>
  21 #include <signal.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <sys/wait.h>
  25 #include <sys/socket.h>
  26 #include <syslog.h>
  27 #include <sys/syslog.h>
  28
  29 #if TIME_WITH_SYS_TIME
  30 # include <sys/time.h>
  31 # include <time.h>
  32 #else
  33 # if HAVE_SYS_TIME_H
  34 #  include <sys/time.h>
  35 # else
  36 #  include <time.h>
  37 # endif
  38 #endif
  39
  40 #include <limits.h>
  41 #include <sys/resource.h>
  42 #include <netinet/in.h>
  43 #include <netinet/tcp.h>
  44 #include <arpa/inet.h>
  45 #include <netdb.h>
  46 #include <sys/un.h>
  47 #include <string.h>
  48 #include <pwd.h>
  49 #include <errno.h>
  50 #include <stdarg.h>
  51 #include <grp.h>
  52 #include <libcitadel.h>
  53 #include "citadel.h"
  54 #include "server.h"
  55 #include "sysdep_decls.h"
  56 #include "citserver.h"
  57 #include "support.h"
  58 #include "config.h"
  59 #include "database.h"
  60 #include "housekeeping.h"
  61 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
  62 #include "ecrash.h"
  63
  64 #ifdef HAVE_SYS_SELECT_H
  65 #include <sys/select.h>
  66 #endif
  67
  68 #ifndef HAVE_SNPRINTF
  69 #include "snprintf.h"
  70 #endif
  71
  72 #include "ctdl_module.h"
  73 #include "threads.h"
  74 #include "user_ops.h"
  75 #include "control.h"
  76
  77
  78 #ifdef DEBUG_MEMORY_LEAKS
  79 struct igheap {
  80         struct igheap *next;
  81         char file[32];
  82         int line;
  83         void *block;
  84 };
  85
  86 struct igheap *igheap = NULL;
  87 #endif
  88
  89
  90 citthread_key_t MyConKey;                               /* TSD key for MyContext() */
  91
  92 int verbosity = DEFAULT_VERBOSITY;              /* Logging level */
  93
  94 struct CitContext masterCC;
  95 time_t last_purge = 0;                          /* Last dead session purge */
  96 int num_sessions = 0;                           /* Current number of sessions */
  97
  98 int syslog_facility = LOG_DAEMON;
  99 int enable_syslog = 0;
 100
 101
 102 /* Flag for single user mode */
 103 static int want_single_user = 0;
 104
 105 /* Try to go single user */
 106
 107 int CtdlTrySingleUser(void)
 108 {
 109         int can_do = 0;
 110
 111         begin_critical_section(S_SINGLE_USER);
 112         if (want_single_user)
 113                 can_do = 0;
 114         else
 115         {
 116                 can_do = 1;
 117                 want_single_user = 1;
 118         }
 119         end_critical_section(S_SINGLE_USER);
 120         return can_do;
 121 }
 122
 123 void CtdlEndSingleUser(void)
 124 {
 125         begin_critical_section(S_SINGLE_USER);
 126         want_single_user = 0;
 127         end_critical_section(S_SINGLE_USER);
 128 }
 129
 130
 131 int CtdlWantSingleUser(void)
 132 {
 133         return want_single_user;
 134 }
 135
 136 int CtdlIsSingleUser(void)
 137 {
 138         if (want_single_user)
 139         {
 140                 /* check for only one context here */
 141                 if (num_sessions == 1)
 142                         return TRUE;
 143         }
 144         return FALSE;
 145 }
 146
 147
 148 /*
 149  * CtdlLogPrintf()  ...   Write logging information
 150  */
 151 void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
 152         va_list arg_ptr;
 153         va_start(arg_ptr, format);
 154         vCtdlLogPrintf(loglevel, format, arg_ptr);
 155         va_end(arg_ptr);
 156 }
 157
 158 void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
 159 {
 160         char buf[SIZ], buf2[SIZ];
 161
 162         if (enable_syslog) {
 163                 vsyslog((syslog_facility | loglevel), format, arg_ptr);
 164         }
 165
 166         /* stderr output code */
 167         if (enable_syslog || running_as_daemon) return;
 168
 169         /* if we run in forground and syslog is disabled, log to terminal */
 170         if (loglevel <= verbosity) {
 171                 struct timeval tv;
 172                 struct tm tim;
 173                 time_t unixtime;
 174
 175                 gettimeofday(&tv, NULL);
 176                 /* Promote to time_t; types differ on some OSes (like darwin) */
 177                 unixtime = tv.tv_sec;
 178                 localtime_r(&unixtime, &tim);
 179                 if (CC->cs_pid != 0) {
 180                         sprintf(buf,
 181                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
 182                                 tim.tm_year + 1900, tim.tm_mon + 1,
 183                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 184                                 tim.tm_sec, (long)tv.tv_usec,
 185                                 CC->cs_pid);
 186                 } else {
 187                         sprintf(buf,
 188                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
 189                                 tim.tm_year + 1900, tim.tm_mon + 1,
 190                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 191                                 tim.tm_sec, (long)tv.tv_usec);
 192                 }
 193                 vsnprintf(buf2, SIZ, format, arg_ptr);
 194
 195                 fprintf(stderr, "%s%s", buf, buf2);
 196                 fflush(stderr);
 197         }
 198 }
 199
 200
 201
 202 /*
 203  * Signal handler to shut down the server.
 204  */
 205
 206 volatile int exit_signal = 0;
 207 volatile int shutdown_and_halt = 0;
 208 volatile int restart_server = 0;
 209 volatile int running_as_daemon = 0;
 210
 211 static RETSIGTYPE signal_cleanup(int signum) {
 212 #ifdef THREADS_USESIGNALS
 213         if (CT)
 214                 CT->signal = signum;
 215         else
 216 #endif
 217         {
 218                 CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
 219                 exit_signal = signum;
 220         }
 221 }
 222
 223
 224
 225 /*
 226  * Some initialization stuff...
 227  */
 228 void init_sysdep(void) {
 229         sigset_t set;
 230
 231         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 232 #ifdef FD_SETSIZE
 233 #ifdef RLIMIT_NOFILE
 234         struct rlimit rl;
 235         getrlimit(RLIMIT_NOFILE, &rl);
 236         rl.rlim_cur = FD_SETSIZE;
 237         rl.rlim_max = FD_SETSIZE;
 238         setrlimit(RLIMIT_NOFILE, &rl);
 239 #endif
 240 #endif
 241
 242         /* If we've got OpenSSL, we're going to use it. */
 243 #ifdef HAVE_OPENSSL
 244         init_ssl();
 245 #endif
 246
 247         /*
 248          * Set up a place to put thread-specific data.
 249          * We only need a single pointer per thread - it points to the
 250          * CitContext structure (in the ContextList linked list) of the
 251          * session to which the calling thread is currently bound.
 252          */
 253         if (citthread_key_create(&MyConKey, NULL) != 0) {
 254                 CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
 255                         strerror(errno));
 256         }
 257
 258         /*
 259          * The action for unexpected signals and exceptions should be to
 260          * call signal_cleanup() to gracefully shut down the server.
 261          */
 262         sigemptyset(&set);
 263         sigaddset(&set, SIGINT);
 264         sigaddset(&set, SIGQUIT);
 265         sigaddset(&set, SIGHUP);
 266         sigaddset(&set, SIGTERM);
 267         // sigaddset(&set, SIGSEGV);    commented out because
 268         // sigaddset(&set, SIGILL);     we want core dumps
 269         // sigaddset(&set, SIGBUS);
 270         sigprocmask(SIG_UNBLOCK, &set, NULL);
 271
 272         signal(SIGINT, signal_cleanup);
 273         signal(SIGQUIT, signal_cleanup);
 274         signal(SIGHUP, signal_cleanup);
 275         signal(SIGTERM, signal_cleanup);
 276         // signal(SIGSEGV, signal_cleanup);     commented out because
 277         // signal(SIGILL, signal_cleanup);      we want core dumps
 278         // signal(SIGBUS, signal_cleanup);
 279
 280         /*
 281          * Do not shut down the server on broken pipe signals, otherwise the
 282          * whole Citadel service would come down whenever a single client
 283          * socket breaks.
 284          */
 285         signal(SIGPIPE, SIG_IGN);
 286 }
 287
 288
 289
 290
 291 /*
 292  * This is a generic function to set up a master socket for listening on
 293  * a TCP port.  The server shuts down if the bind fails.
 294  *
 295  */
 296 int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
 297 {
 298         struct sockaddr_in sin;
 299         int s, i;
 300         int actual_queue_len;
 301
 302         actual_queue_len = queue_len;
 303         if (actual_queue_len < 5) actual_queue_len = 5;
 304
 305         memset(&sin, 0, sizeof(sin));
 306         sin.sin_family = AF_INET;
 307         sin.sin_port = htons((u_short)port_number);
 308         if (ip_addr == NULL) {
 309                 sin.sin_addr.s_addr = INADDR_ANY;
 310         }
 311         else {
 312                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 313         }
 314
 315         if (sin.sin_addr.s_addr == !INADDR_ANY) {
 316                 sin.sin_addr.s_addr = INADDR_ANY;
 317         }
 318
 319         s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 320
 321         if (s < 0) {
 322                 *errormessage = (char*) malloc(SIZ + 1);
 323                 snprintf(*errormessage, SIZ,
 324                                  "citserver: Can't create a socket: %s",
 325                                  strerror(errno));
 326                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 327                 return(-1);
 328         }
 329
 330         i = 1;
 331         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 332
 333         if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
 334                 *errormessage = (char*) malloc(SIZ + 1);
 335                 snprintf(*errormessage, SIZ,
 336                                  "citserver: Can't bind: %s",
 337                                  strerror(errno));
 338                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 339                 close(s);
 340                 return(-1);
 341         }
 342
 343         /* set to nonblock - we need this for some obscure situations */
 344         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 345                 *errormessage = (char*) malloc(SIZ + 1);
 346                 snprintf(*errormessage, SIZ,
 347                                  "citserver: Can't set socket to non-blocking: %s",
 348                                  strerror(errno));
 349                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 350                 close(s);
 351                 return(-1);
 352         }
 353
 354         if (listen(s, actual_queue_len) < 0) {
 355                 *errormessage = (char*) malloc(SIZ + 1);
 356                 snprintf(*errormessage, SIZ,
 357                                  "citserver: Can't listen: %s",
 358                                  strerror(errno));
 359                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 360                 close(s);
 361                 return(-1);
 362         }
 363
 364         return(s);
 365 }
 366
 367
 368
 369 /*
 370  * Create a Unix domain socket and listen on it
 371  */
 372 int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
 373 {
 374         struct sockaddr_un addr;
 375         int s;
 376         int i;
 377         int actual_queue_len;
 378
 379         actual_queue_len = queue_len;
 380         if (actual_queue_len < 5) actual_queue_len = 5;
 381
 382         i = unlink(sockpath);
 383         if ((i != 0) && (errno != ENOENT)) {
 384                 *errormessage = (char*) malloc(SIZ + 1);
 385                 snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
 386                         sockpath, strerror(errno));
 387                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 388                 return(-1);
 389         }
 390
 391         memset(&addr, 0, sizeof(addr));
 392         addr.sun_family = AF_UNIX;
 393         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 394
 395         s = socket(AF_UNIX, SOCK_STREAM, 0);
 396         if (s < 0) {
 397                 *errormessage = (char*) malloc(SIZ + 1);
 398                 snprintf(*errormessage, SIZ,
 399                          "citserver: Can't create a socket: %s",
 400                          strerror(errno));
 401                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 402                 return(-1);
 403         }
 404
 405         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 406                 *errormessage = (char*) malloc(SIZ + 1);
 407                 snprintf(*errormessage, SIZ,
 408                          "citserver: Can't bind: %s",
 409                          strerror(errno));
 410                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 411                 return(-1);
 412         }
 413
 414         /* set to nonblock - we need this for some obscure situations */
 415         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 416                 *errormessage = (char*) malloc(SIZ + 1);
 417                 snprintf(*errormessage, SIZ,
 418                          "citserver: Can't set socket to non-blocking: %s",
 419                          strerror(errno));
 420                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 421                 close(s);
 422                 return(-1);
 423         }
 424
 425         if (listen(s, actual_queue_len) < 0) {
 426                 *errormessage = (char*) malloc(SIZ + 1);
 427                 snprintf(*errormessage, SIZ,
 428                          "citserver: Can't listen: %s",
 429                          strerror(errno));
 430                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 431                 return(-1);
 432         }
 433
 434         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 435         return(s);
 436 }
 437
 438
 439
 440 /*
 441  * Return a pointer to the CitContext structure bound to the thread which
 442  * called this function.  If there's no such binding (for example, if it's
 443  * called by the housekeeper thread) then a generic 'master' CC is returned.
 444  *
 445  * This function is used *VERY* frequently and must be kept small.
 446  */
 447 struct CitContext *MyContext(void) {
 448
 449         register struct CitContext *c;
 450
 451         return ((c = (struct CitContext *) citthread_getspecific(MyConKey),
 452                 c == NULL) ? &masterCC : c
 453         );
 454 }
 455
 456
 457 /*
 458  * Initialize a new context and place it in the list.  The session number
 459  * used to be the PID (which is why it's called cs_pid), but that was when we
 460  * had one process per session.  Now we just assign them sequentially, starting
 461  * at 1 (don't change it to 0 because masterCC uses 0).
 462  */
 463 struct CitContext *CreateNewContext(void) {
 464         struct CitContext *me;
 465         static int next_pid = 0;
 466
 467         me = (struct CitContext *) malloc(sizeof(struct CitContext));
 468         if (me == NULL) {
 469                 CtdlLogPrintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
 470                 return NULL;
 471         }
 472
 473         memset(me, 0, sizeof(struct CitContext));
 474
 475         /* Give the contaxt a name. Hopefully makes it easier to track */
 476         strcpy (me->user.fullname, "SYS_notauth");
 477
 478         /* The new context will be created already in the CON_EXECUTING state
 479          * in order to prevent another thread from grabbing it while it's
 480          * being set up.
 481          */
 482         me->state = CON_EXECUTING;
 483         /*
 484          * Generate a unique session number and insert this context into
 485          * the list.
 486          */
 487         begin_critical_section(S_SESSION_TABLE);
 488         me->cs_pid = ++next_pid;
 489         me->prev = NULL;
 490         me->next = ContextList;
 491         ContextList = me;
 492         if (me->next != NULL) {
 493                 me->next->prev = me;
 494         }
 495         ++num_sessions;
 496         end_critical_section(S_SESSION_TABLE);
 497         return (me);
 498 }
 499
 500
 501 struct CitContext *CtdlGetContextArray(int *count)
 502 {
 503         int nContexts, i;
 504         struct CitContext *nptr, *cptr;
 505
 506         nContexts = num_sessions;
 507         nptr = malloc(sizeof(struct CitContext) * nContexts);
 508         if (!nptr)
 509                 return NULL;
 510         begin_critical_section(S_SESSION_TABLE);
 511         for (cptr = ContextList, i=0; cptr != NULL && i < nContexts; cptr = cptr->next, i++)
 512                 memcpy(&nptr[i], cptr, sizeof (struct CitContext));
 513         end_critical_section (S_SESSION_TABLE);
 514
 515         *count = i;
 516         return nptr;
 517 }
 518
 519
 520
 521 /**
 522  * This function fills in a context and its user field correctly
 523  * Then creates/loads that user
 524  */
 525 void CtdlFillSystemContext(struct CitContext *context, char *name)
 526 {
 527         char sysname[USERNAME_SIZE];
 528
 529         memset(context, 0, sizeof(struct CitContext));
 530         context->internal_pgm = 1;
 531         context->cs_pid = 0;
 532         strcpy (sysname, "SYS_");
 533         strcat (sysname, name);
 534         /* internal_create_user has the side effect of loading the user regardless of wether they
 535          * already existed or needed to be created
 536          */
 537         internal_create_user (sysname, &(context->user), -1) ;
 538
 539         /* Check to see if the system user needs upgrading */
 540         if (context->user.usernum == 0)
 541         {       /* old system user with number 0, upgrade it */
 542                 context->user.usernum = get_new_user_number();
 543                 CtdlLogPrintf(CTDL_DEBUG, "Upgrading system user \"%s\" from user number 0 to user number %d\n", context->user.fullname, context->user.usernum);
 544                 /* add user to the database */
 545                 putuser(&(context->user));
 546                 cdb_store(CDB_USERSBYNUMBER, &(context->user.usernum), sizeof(long), context->user.fullname, strlen(context->user.fullname)+1);
 547         }
 548 }
 549
 550 /*
 551  * The following functions implement output buffering. If the kernel supplies
 552  * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
 553  * user-space buffering.
 554  */
 555 #ifndef HAVE_DARWIN
 556 #ifdef TCP_CORK
 557 #       define HAVE_TCP_BUFFERING
 558 #else
 559 #       ifdef TCP_NOPUSH
 560 #               define HAVE_TCP_BUFFERING
 561 #               define TCP_CORK TCP_NOPUSH
 562 #       endif
 563 #endif /* TCP_CORK */
 564 #endif /* HAVE_DARWIN */
 565
 566 #ifdef HAVE_TCP_BUFFERING
 567 static unsigned on = 1, off = 0;
 568 void buffer_output(void) {
 569         struct CitContext *ctx = MyContext();
 570         setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 571         ctx->buffering = 1;
 572 }
 573
 574 void unbuffer_output(void) {
 575         struct CitContext *ctx = MyContext();
 576         setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 577         ctx->buffering = 0;
 578 }
 579
 580 void flush_output(void) {
 581         struct CitContext *ctx = MyContext();
 582         setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 583         setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 584 }
 585 #else
 586 #ifdef HAVE_DARWIN
 587 /* Stub functions for Darwin/OS X where TCP buffering isn't liked at all */
 588 void buffer_output(void) {
 589         CC->buffering = 0;
 590 }
 591 void unbuffer_output(void) {
 592         CC->buffering = 0;
 593 }
 594 void flush_output(void) {
 595 }
 596 #else
 597 void buffer_output(void) {
 598         if (CC->buffering == 0) {
 599                 CC->buffering = 1;
 600                 CC->buffer_len = 0;
 601                 CC->output_buffer = malloc(SIZ);
 602         }
 603 }
 604
 605 void flush_output(void) {
 606         if (CC->buffering == 1) {
 607                 client_write(CC->output_buffer, CC->buffer_len);
 608                 CC->buffer_len = 0;
 609         }
 610 }
 611
 612 void unbuffer_output(void) {
 613         if (CC->buffering == 1) {
 614                 CC->buffering = 0;
 615                 /* We don't call flush_output because we can't. */
 616                 client_write(CC->output_buffer, CC->buffer_len);
 617                 CC->buffer_len = 0;
 618                 free(CC->output_buffer);
 619                 CC->output_buffer = NULL;
 620         }
 621 }
 622 #endif /* HAVE_DARWIN */
 623 #endif /* HAVE_TCP_BUFFERING */
 624
 625
 626
 627 /*
 628  * client_write()   ...    Send binary data to the client.
 629  */
 630 int client_write(char *buf, int nbytes)
 631 {
 632         int bytes_written = 0;
 633         int retval;
 634 #ifndef HAVE_TCP_BUFFERING
 635         int old_buffer_len = 0;
 636 #endif
 637         fd_set wset;
 638         t_context *Ctx;
 639         int fdflags;
 640
 641         Ctx = CC;
 642         if (Ctx->redirect_buffer != NULL) {
 643                 if ((Ctx->redirect_len + nbytes + 2) >= Ctx->redirect_alloc) {
 644                         Ctx->redirect_alloc = (Ctx->redirect_alloc * 2) + nbytes;
 645                         Ctx->redirect_buffer = realloc(Ctx->redirect_buffer,
 646                                                 Ctx->redirect_alloc);
 647                 }
 648                 memcpy(&Ctx->redirect_buffer[Ctx->redirect_len], buf, nbytes);
 649                 Ctx->redirect_len += nbytes;
 650                 Ctx->redirect_buffer[Ctx->redirect_len] = 0;
 651                 return 0;
 652         }
 653
 654 #ifndef HAVE_TCP_BUFFERING
 655         /* If we're buffering for later, do that now. */
 656         if (Ctx->buffering) {
 657                 old_buffer_len = Ctx->buffer_len;
 658                 Ctx->buffer_len += nbytes;
 659                 Ctx->output_buffer = realloc(Ctx->output_buffer, Ctx->buffer_len);
 660                 memcpy(&Ctx->output_buffer[old_buffer_len], buf, nbytes);
 661                 return 0;
 662         }
 663 #endif
 664
 665         /* Ok, at this point we're not buffering.  Go ahead and write. */
 666
 667 #ifdef HAVE_OPENSSL
 668         if (Ctx->redirect_ssl) {
 669                 client_write_ssl(buf, nbytes);
 670                 return 0;
 671         }
 672 #endif
 673
 674         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 675
 676         while (bytes_written < nbytes) {
 677                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 678                         FD_ZERO(&wset);
 679                         FD_SET(Ctx->client_socket, &wset);
 680                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 681                                 CtdlLogPrintf(CTDL_ERR,
 682                                         "client_write(%d bytes) select failed: %s (%d)\n",
 683                                         nbytes - bytes_written,
 684                                         strerror(errno), errno);
 685                                 cit_backtrace();
 686                                 Ctx->kill_me = 1;
 687                                 return -1;
 688                         }
 689                 }
 690
 691                 retval = write(Ctx->client_socket, &buf[bytes_written],
 692                         nbytes - bytes_written);
 693                 if (retval < 1) {
 694                         CtdlLogPrintf(CTDL_ERR,
 695                                 "client_write(%d bytes) failed: %s (%d)\n",
 696                                 nbytes - bytes_written,
 697                                 strerror(errno), errno);
 698                         cit_backtrace();
 699                         // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s",  &buf[bytes_written]);
 700                         Ctx->kill_me = 1;
 701                         return -1;
 702                 }
 703                 bytes_written = bytes_written + retval;
 704         }
 705         return 0;
 706 }
 707
 708
 709 /*
 710  * cprintf()    Send formatted printable data to the client.
 711  *              Implemented in terms of client_write() so it's technically not sysdep...
 712  */
 713 void cprintf(const char *format, ...) {
 714         va_list arg_ptr;
 715         char buf[1024];
 716
 717         va_start(arg_ptr, format);
 718         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 719                 buf[sizeof buf - 2] = '\n';
 720         client_write(buf, strlen(buf));
 721         va_end(arg_ptr);
 722 }
 723
 724
 725 /*
 726  * Read data from the client socket.
 727  * Return values are:
 728  *      1       Requested number of bytes has been read.
 729  *      0       Request timed out.
 730  *      -1      The socket is broken.
 731  * If the socket breaks, the session will be terminated.
 732  */
 733 int client_read_to(char *buf, int bytes, int timeout)
 734 {
 735         int len,rlen;
 736         fd_set rfds;
 737         int fd;
 738         struct timeval tv;
 739         int retval;
 740
 741 #ifdef HAVE_OPENSSL
 742         if (CC->redirect_ssl) {
 743                 return (client_read_ssl(buf, bytes, timeout));
 744         }
 745 #endif
 746         len = 0;
 747         fd = CC->client_socket;
 748         while(len<bytes) {
 749                 FD_ZERO(&rfds);
 750                 FD_SET(fd, &rfds);
 751                 tv.tv_sec = timeout;
 752                 tv.tv_usec = 0;
 753
 754                 retval = select( (fd)+1,
 755                                  &rfds, NULL, NULL, &tv);
 756                 if (retval < 0)
 757                 {
 758                         if (errno == EINTR)
 759                         {
 760                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted select().\n");
 761                                 CC->kill_me = 1;
 762                                 return (-1);
 763                         }
 764                 }
 765
 766                 if (FD_ISSET(fd, &rfds) == 0) {
 767                         return(0);
 768                 }
 769
 770                 rlen = read(fd, &buf[len], bytes-len);
 771                 if (rlen<1) {
 772                         /* The socket has been disconnected! */
 773                         CC->kill_me = 1;
 774                         return(-1);
 775                 }
 776                 len = len + rlen;
 777         }
 778         return(1);
 779 }
 780
 781 /*
 782  * Read data from the client socket with default timeout.
 783  * (This is implemented in terms of client_read_to() and could be
 784  * justifiably moved out of sysdep.c)
 785  */
 786 INLINE int client_read(char *buf, int bytes)
 787 {
 788         return(client_read_to(buf, bytes, config.c_sleeping));
 789 }
 790
 791
 792 /*
 793  * client_getln()   ...   Get a LF-terminated line of text from the client.
 794  * (This is implemented in terms of client_read() and could be
 795  * justifiably moved out of sysdep.c)
 796  */
 797 int client_getln(char *buf, int bufsize)
 798 {
 799         int i, retval;
 800
 801         /* Read one character at a time.
 802          */
 803         for (i = 0;;i++) {
 804                 retval = client_read(&buf[i], 1);
 805                 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
 806                         break;
 807         }
 808
 809         /* If we got a long line, discard characters until the newline.
 810          */
 811         if (i == (bufsize-1))
 812                 while (buf[i] != '\n' && retval == 1)
 813                         retval = client_read(&buf[i], 1);
 814
 815         /* Strip the trailing LF, and the trailing CR if present.
 816          */
 817         buf[i] = 0;
 818         while ( (i > 0)
 819                 && ( (buf[i - 1]==13)
 820                      || ( buf[i - 1]==10)) ) {
 821                 i--;
 822                 buf[i] = 0;
 823         }
 824         if (retval < 0) safestrncpy(&buf[i], "000", bufsize - i);
 825         return(retval);
 826 }
 827
 828
 829 /*
 830  * Cleanup any contexts that are left lying around
 831  */
 832 void context_cleanup(void)
 833 {
 834         struct CitContext *ptr = NULL;
 835         struct CitContext *rem = NULL;
 836
 837         /*
 838          * Clean up the contexts.
 839          * There are no threads so no critical_section stuff is needed.
 840          */
 841         ptr = ContextList;
 842
 843         /* We need to update the ContextList because some modules may want to itterate it
 844          * Question is should we NULL it before iterating here or should we just keep updating it
 845          * as we remove items?
 846          *
 847          * Answer is to NULL it first to prevent modules from doing any actions on the list at all
 848          */
 849         ContextList=NULL;
 850         while (ptr != NULL){
 851                 /* Remove the session from the active list */
 852                 rem = ptr->next;
 853                 --num_sessions;
 854
 855                 CtdlLogPrintf(CTDL_DEBUG, "Purging session %d\n", ptr->cs_pid);
 856                 RemoveContext(ptr);
 857                 free (ptr);
 858                 ptr = rem;
 859         }
 860 }
 861
 862
 863
 864 void close_masters (void)
 865 {
 866         struct ServiceFunctionHook *serviceptr;
 867
 868         /*
 869          * close all protocol master sockets
 870          */
 871         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 872             serviceptr = serviceptr->next ) {
 873
 874                 if (serviceptr->tcp_port > 0)
 875                 {
 876                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 877                                 serviceptr->tcp_port);
 878                         serviceptr->tcp_port = 0;
 879                 }
 880
 881                 if (serviceptr->sockpath != NULL)
 882                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 883                                 serviceptr->sockpath);
 884
 885                 close(serviceptr->msock);
 886                 /* If it's a Unix domain socket, remove the file. */
 887                 if (serviceptr->sockpath != NULL) {
 888                         unlink(serviceptr->sockpath);
 889                         serviceptr->sockpath = NULL;
 890                 }
 891         }
 892 }
 893
 894
 895 /*
 896  * The system-dependent part of master_cleanup() - close the master socket.
 897  */
 898 void sysdep_master_cleanup(void) {
 899
 900         close_masters();
 901
 902         context_cleanup();
 903
 904 #ifdef HAVE_OPENSSL
 905         destruct_ssl();
 906 #endif
 907         CtdlDestroyProtoHooks();
 908         CtdlDestroyDeleteHooks();
 909         CtdlDestroyXmsgHooks();
 910         CtdlDestroyNetprocHooks();
 911         CtdlDestroyUserHooks();
 912         CtdlDestroyMessageHook();
 913         CtdlDestroyCleanupHooks();
 914         CtdlDestroyFixedOutputHooks();
 915         CtdlDestroySessionHooks();
 916         CtdlDestroyServiceHook();
 917         CtdlDestroyRoomHooks();
 918         CtdlDestroyDirectoryServiceFuncs();
 919         #ifdef HAVE_BACKTRACE
 920         eCrash_Uninit();
 921         #endif
 922 }
 923
 924
 925
 926 /*
 927  * Terminate another session.
 928  * (This could justifiably be moved out of sysdep.c because it
 929  * no longer does anything that is system-dependent.)
 930  */
 931 void kill_session(int session_to_kill) {
 932         struct CitContext *ptr;
 933
 934         begin_critical_section(S_SESSION_TABLE);
 935         for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
 936                 if (ptr->cs_pid == session_to_kill) {
 937                         ptr->kill_me = 1;
 938                 }
 939         }
 940         end_critical_section(S_SESSION_TABLE);
 941 }
 942
 943 pid_t current_child;
 944 void graceful_shutdown(int signum) {
 945         kill(current_child, signum);
 946         unlink(file_pid_file);
 947         exit(0);
 948 }
 949
 950
 951 /*
 952  * Start running as a daemon.
 953  */
 954 void start_daemon(int unused) {
 955         int status = 0;
 956         pid_t child = 0;
 957         FILE *fp;
 958         int do_restart = 0;
 959
 960         current_child = 0;
 961
 962         /* Close stdin/stdout/stderr and replace them with /dev/null.
 963          * We don't just call close() because we don't want these fd's
 964          * to be reused for other files.
 965          */
 966         chdir(ctdl_run_dir);
 967
 968         child = fork();
 969         if (child != 0) {
 970                 exit(0);
 971         }
 972
 973         signal(SIGHUP, SIG_IGN);
 974         signal(SIGINT, SIG_IGN);
 975         signal(SIGQUIT, SIG_IGN);
 976
 977         setsid();
 978         umask(0);
 979         freopen("/dev/null", "r", stdin);
 980         freopen("/dev/null", "w", stdout);
 981         freopen("/dev/null", "w", stderr);
 982
 983         do {
 984                 current_child = fork();
 985
 986                 signal(SIGTERM, graceful_shutdown);
 987
 988                 if (current_child < 0) {
 989                         perror("fork");
 990                         exit(errno);
 991                 }
 992
 993                 else if (current_child == 0) {
 994                         return; /* continue starting citadel. */
 995                 }
 996
 997                 else {
 998                         fp = fopen(file_pid_file, "w");
 999                         if (fp != NULL) {
1000                                 fprintf(fp, ""F_PID_T"\n", getpid());
1001                                 fclose(fp);
1002                         }
1003                         waitpid(current_child, &status, 0);
1004                 }
1005
1006                 do_restart = 0;
1007
1008                 /* Did the main process exit with an actual exit code? */
1009                 if (WIFEXITED(status)) {
1010
1011                         /* Exit code 0 means the watcher should exit */
1012                         if (WEXITSTATUS(status) == 0) {
1013                                 do_restart = 0;
1014                         }
1015
1016                         /* Exit code 101-109 means the watcher should exit */
1017                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
1018                                 do_restart = 0;
1019                         }
1020
1021                         /* Any other exit code means we should restart. */
1022                         else {
1023                                 do_restart = 1;
1024                         }
1025                 }
1026
1027                 /* Any other type of termination (signals, etc.) should also restart. */
1028                 else {
1029                         do_restart = 1;
1030                 }
1031
1032         } while (do_restart);
1033
1034         unlink(file_pid_file);
1035         exit(WEXITSTATUS(status));
1036 }
1037
1038
1039
1040 /*
1041  * Generic routine to convert a login name to a full name (gecos)
1042  * Returns nonzero if a conversion took place
1043  */
1044 int convert_login(char NameToConvert[]) {
1045         struct passwd *pw;
1046         int a;
1047
1048         pw = getpwnam(NameToConvert);
1049         if (pw == NULL) {
1050                 return(0);
1051         }
1052         else {
1053                 strcpy(NameToConvert, pw->pw_gecos);
1054                 for (a=0; a<strlen(NameToConvert); ++a) {
1055                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1056                 }
1057                 return(1);
1058         }
1059 }
1060
1061 /*
1062  * Purge all sessions which have the 'kill_me' flag set.
1063  * This function has code to prevent it from running more than once every
1064  * few seconds, because running it after every single unbind would waste a lot
1065  * of CPU time and keep the context list locked too much.  To force it to run
1066  * anyway, set "force" to nonzero.
1067  */
1068 void dead_session_purge(int force) {
1069         struct CitContext *ptr, *ptr2;          /* general-purpose utility pointer */
1070         struct CitContext *rem = NULL;  /* list of sessions to be destroyed */
1071
1072         if (force == 0) {
1073                 if ( (time(NULL) - last_purge) < 5 ) {
1074                         return; /* Too soon, go away */
1075                 }
1076         }
1077         time(&last_purge);
1078
1079         if (try_critical_section(S_SESSION_TABLE))
1080                 return;
1081
1082         ptr = ContextList;
1083         while (ptr) {
1084                 ptr2 = ptr;
1085                 ptr = ptr->next;
1086
1087                 if ( (ptr2->state == CON_IDLE) && (ptr2->kill_me) ) {
1088                         /* Remove the session from the active list */
1089                         if (ptr2->prev) {
1090                                 ptr2->prev->next = ptr2->next;
1091                         }
1092                         else {
1093                                 ContextList = ptr2->next;
1094                         }
1095                         if (ptr2->next) {
1096                                 ptr2->next->prev = ptr2->prev;
1097                         }
1098
1099                         --num_sessions;
1100                         /* And put it on our to-be-destroyed list */
1101                         ptr2->next = rem;
1102                         rem = ptr2;
1103                 }
1104         }
1105         end_critical_section(S_SESSION_TABLE);
1106
1107         /* Now that we no longer have the session list locked, we can take
1108          * our time and destroy any sessions on the to-be-killed list, which
1109          * is allocated privately on this thread's stack.
1110          */
1111         while (rem != NULL) {
1112                 CtdlLogPrintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
1113                 RemoveContext(rem);
1114                 ptr = rem;
1115                 rem = rem->next;
1116                 free(ptr);
1117         }
1118 }
1119
1120
1121
1122
1123
1124 /*
1125  * masterCC is the context we use when not attached to a session.  This
1126  * function initializes it.
1127  */
1128 void InitializeMasterCC(void) {
1129         memset(&masterCC, 0, sizeof(struct CitContext));
1130         masterCC.internal_pgm = 1;
1131         masterCC.cs_pid = 0;
1132 }
1133
1134
1135
1136
1137 /*
1138  * Bind a thread to a context.  (It's inline merely to speed things up.)
1139  */
1140 INLINE void become_session(struct CitContext *which_con) {
1141         citthread_setspecific(MyConKey, (void *)which_con );
1142 }
1143
1144
1145
1146 /*
1147  * This loop just keeps going and going and going...
1148  */
1149 /*
1150  * FIXME:
1151  * This current implimentation of worker_thread creates a bottle neck in several situations
1152  * The first thing to remember is that a single thread can handle more than one connection at a time.
1153  * More threads mean less memory for the system to run in.
1154  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1155  * something to happen anywhere.
1156  * This current implimentation requires worker threads to wait in other locations, after it has
1157  * been committed to a single connection which is very wasteful.
1158  * As an extreme case consider this:
1159  * A slow client connects and this slow client sends only one character each second.
1160  * With this current implimentation a single worker thread is dispatched to handle that connection
1161  * until such times as the client timeout expires, an error occurs on the socket or the client
1162  * completes its transmission.
1163  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1164  * second interval between chars.
1165  *
1166  * It is my intention to re-write this code and the associated client_getln, client_read functions
1167  * to allow any thread to read data on behalf of any connection (context).
1168  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1169  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1170  * process it.
1171  * This worker thread loop also needs to be able to handle binary data.
1172  */
1173
1174 void *worker_thread(void *arg) {
1175         int i;
1176         int highest;
1177         struct CitContext *ptr;
1178         struct CitContext *bind_me = NULL;
1179         fd_set readfds;
1180         int retval = 0;
1181         struct CitContext *con= NULL;   /* Temporary context pointer */
1182         struct ServiceFunctionHook *serviceptr;
1183         int ssock;                      /* Descriptor for client socket */
1184         struct timeval tv;
1185         int force_purge = 0;
1186         int m;
1187
1188
1189         while (!CtdlThreadCheckStop()) {
1190
1191                 /* make doubly sure we're not holding any stale db handles
1192                  * which might cause a deadlock.
1193                  */
1194                 cdb_check_handles();
1195 do_select:      force_purge = 0;
1196                 bind_me = NULL;         /* Which session shall we handle? */
1197
1198                 /* Initialize the fdset. */
1199                 FD_ZERO(&readfds);
1200                 highest = 0;
1201
1202                 begin_critical_section(S_SESSION_TABLE);
1203                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1204                         if (ptr->state == CON_IDLE) {
1205                                 FD_SET(ptr->client_socket, &readfds);
1206                                 if (ptr->client_socket > highest)
1207                                         highest = ptr->client_socket;
1208                         }
1209                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1210                                 bind_me = ptr;
1211                                 ptr->state = CON_EXECUTING;
1212                         }
1213                 }
1214                 end_critical_section(S_SESSION_TABLE);
1215
1216                 if (bind_me) {
1217                         goto SKIP_SELECT;
1218                 }
1219
1220                 /* If we got this far, it means that there are no sessions
1221                  * which a previous thread marked for attention, so we go
1222                  * ahead and get ready to select().
1223                  */
1224
1225                 /* First, add the various master sockets to the fdset. */
1226                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1227                 serviceptr = serviceptr->next ) {
1228                         m = serviceptr->msock;
1229                         FD_SET(m, &readfds);
1230                         if (m > highest) {
1231                                 highest = m;
1232                         }
1233                 }
1234
1235                 if (!CtdlThreadCheckStop()) {
1236                         tv.tv_sec = 1;          /* wake up every second if no input */
1237                         tv.tv_usec = 0;
1238                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1239                 }
1240                 else
1241                         return NULL;
1242
1243                 /* Now figure out who made this select() unblock.
1244                  * First, check for an error or exit condition.
1245                  */
1246                 if (retval < 0) {
1247                         if (errno == EBADF) {
1248                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1249                                         strerror(errno));
1250                                 goto do_select;
1251                         }
1252                         if (errno != EINTR) {
1253                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1254                                 CtdlThreadStopAll();
1255                         } else {
1256                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1257                                 if (CtdlThreadCheckStop()) return(NULL);
1258                                 goto do_select;
1259                         }
1260                 }
1261                 else if(retval == 0) {
1262                         if (CtdlThreadCheckStop()) return(NULL);
1263                         goto SKIP_SELECT;
1264                 }
1265                 /* Next, check to see if it's a new client connecting
1266                  * on a master socket.
1267                  */
1268                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1269                      serviceptr = serviceptr->next ) {
1270
1271                         if (FD_ISSET(serviceptr->msock, &readfds)) {
1272                                 ssock = accept(serviceptr->msock, NULL, 0);
1273                                 if (ssock >= 0) {
1274                                         CtdlLogPrintf(CTDL_DEBUG,
1275                                                 "New client socket %d\n",
1276                                                 ssock);
1277
1278                                         /* The master socket is non-blocking but the client
1279                                          * sockets need to be blocking, otherwise certain
1280                                          * operations barf on FreeBSD.  Not a fatal error.
1281                                          */
1282                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1283                                                 CtdlLogPrintf(CTDL_EMERG,
1284                                                         "citserver: Can't set socket to blocking: %s\n",
1285                                                         strerror(errno));
1286                                         }
1287
1288                                         /* New context will be created already
1289                                          * set up in the CON_EXECUTING state.
1290                                          */
1291                                         con = CreateNewContext();
1292
1293                                         /* Assign our new socket number to it. */
1294                                         con->client_socket = ssock;
1295                                         con->h_command_function =
1296                                                 serviceptr->h_command_function;
1297                                         con->h_async_function =
1298                                                 serviceptr->h_async_function;
1299                                         con->ServiceName =
1300                                                 serviceptr->ServiceName;
1301
1302                                         /* Determine whether it's a local socket */
1303                                         if (serviceptr->sockpath != NULL)
1304                                                 con->is_local_socket = 1;
1305
1306                                         /* Set the SO_REUSEADDR socket option */
1307                                         i = 1;
1308                                         setsockopt(ssock, SOL_SOCKET,
1309                                                 SO_REUSEADDR,
1310                                                 &i, sizeof(i));
1311
1312                                         become_session(con);
1313                                         begin_session(con);
1314                                         serviceptr->h_greeting_function();
1315                                         become_session(NULL);
1316                                         con->state = CON_IDLE;
1317                                         goto do_select;
1318                                 }
1319                         }
1320                 }
1321
1322                 /* It must be a client socket.  Find a context that has data
1323                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1324                  * active sockets other than our chosen one are marked as
1325                  * CON_READY so the next thread that comes around can just bind
1326                  * to one without having to select() again.
1327                  */
1328                 begin_critical_section(S_SESSION_TABLE);
1329                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1330                         if ( (FD_ISSET(ptr->client_socket, &readfds))
1331                            && (ptr->state != CON_EXECUTING) ) {
1332                                 ptr->input_waiting = 1;
1333                                 if (!bind_me) {
1334                                         bind_me = ptr;  /* I choose you! */
1335                                         bind_me->state = CON_EXECUTING;
1336                                 }
1337                                 else {
1338                                         ptr->state = CON_READY;
1339                                 }
1340                         }
1341                 }
1342                 end_critical_section(S_SESSION_TABLE);
1343
1344 SKIP_SELECT:
1345                 /* We're bound to a session */
1346                 if (bind_me != NULL) {
1347                         become_session(bind_me);
1348
1349                         /* If the client has sent a command, execute it. */
1350                         if (CC->input_waiting) {
1351                                 CC->h_command_function();
1352                                 CC->input_waiting = 0;
1353                         }
1354
1355                         /* If there are asynchronous messages waiting and the
1356                          * client supports it, do those now */
1357                         if ((CC->is_async) && (CC->async_waiting)
1358                            && (CC->h_async_function != NULL)) {
1359                                 CC->h_async_function();
1360                                 CC->async_waiting = 0;
1361                         }
1362
1363                         force_purge = CC->kill_me;
1364                         become_session(NULL);
1365                         bind_me->state = CON_IDLE;
1366                 }
1367
1368                 dead_session_purge(force_purge);
1369                 do_housekeeping();
1370         }
1371         /* If control reaches this point, the server is shutting down */
1372         return(NULL);
1373 }
1374
1375
1376
1377
1378 /*
1379  * SyslogFacility()
1380  * Translate text facility name to syslog.h defined value.
1381  */
1382 int SyslogFacility(char *name)
1383 {
1384         int i;
1385         struct
1386         {
1387                 int facility;
1388                 char *name;
1389         }   facTbl[] =
1390         {
1391                 {   LOG_KERN,   "kern"          },
1392                 {   LOG_USER,   "user"          },
1393                 {   LOG_MAIL,   "mail"          },
1394                 {   LOG_DAEMON, "daemon"        },
1395                 {   LOG_AUTH,   "auth"          },
1396                 {   LOG_SYSLOG, "syslog"        },
1397                 {   LOG_LPR,    "lpr"           },
1398                 {   LOG_NEWS,   "news"          },
1399                 {   LOG_UUCP,   "uucp"          },
1400                 {   LOG_LOCAL0, "local0"        },
1401                 {   LOG_LOCAL1, "local1"        },
1402                 {   LOG_LOCAL2, "local2"        },
1403                 {   LOG_LOCAL3, "local3"        },
1404                 {   LOG_LOCAL4, "local4"        },
1405                 {   LOG_LOCAL5, "local5"        },
1406                 {   LOG_LOCAL6, "local6"        },
1407                 {   LOG_LOCAL7, "local7"        },
1408                 {   0,            NULL          }
1409         };
1410         for(i = 0; facTbl[i].name != NULL; i++) {
1411                 if(!strcasecmp(name, facTbl[i].name))
1412                         return facTbl[i].facility;
1413         }
1414         enable_syslog = 0;
1415         return LOG_DAEMON;
1416 }
1417
1418
1419 /********** MEM CHEQQER ***********/
1420
1421 #ifdef DEBUG_MEMORY_LEAKS
1422
1423 #undef malloc
1424 #undef realloc
1425 #undef strdup
1426 #undef free
1427
1428 void *tracked_malloc(size_t size, char *file, int line) {
1429         struct igheap *thisheap;
1430         void *block;
1431
1432         block = malloc(size);
1433         if (block == NULL) return(block);
1434
1435         thisheap = malloc(sizeof(struct igheap));
1436         if (thisheap == NULL) {
1437                 free(block);
1438                 return(NULL);
1439         }
1440
1441         thisheap->block = block;
1442         strcpy(thisheap->file, file);
1443         thisheap->line = line;
1444
1445         begin_critical_section(S_DEBUGMEMLEAKS);
1446         thisheap->next = igheap;
1447         igheap = thisheap;
1448         end_critical_section(S_DEBUGMEMLEAKS);
1449
1450         return(block);
1451 }
1452
1453
1454 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1455         struct igheap *thisheap;
1456         void *block;
1457
1458         block = realloc(ptr, size);
1459         if (block == NULL) return(block);
1460
1461         thisheap = malloc(sizeof(struct igheap));
1462         if (thisheap == NULL) {
1463                 free(block);
1464                 return(NULL);
1465         }
1466
1467         thisheap->block = block;
1468         strcpy(thisheap->file, file);
1469         thisheap->line = line;
1470
1471         begin_critical_section(S_DEBUGMEMLEAKS);
1472         thisheap->next = igheap;
1473         igheap = thisheap;
1474         end_critical_section(S_DEBUGMEMLEAKS);
1475
1476         return(block);
1477 }
1478
1479
1480
1481 void tracked_free(void *ptr) {
1482         struct igheap *thisheap;
1483         struct igheap *trash;
1484
1485         free(ptr);
1486
1487         if (igheap == NULL) return;
1488         begin_critical_section(S_DEBUGMEMLEAKS);
1489         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1490                 if (thisheap->next != NULL) {
1491                         if (thisheap->next->block == ptr) {
1492                                 trash = thisheap->next;
1493                                 thisheap->next = thisheap->next->next;
1494                                 free(trash);
1495                         }
1496                 }
1497         }
1498         if (igheap->block == ptr) {
1499                 trash = igheap;
1500                 igheap = igheap->next;
1501                 free(trash);
1502         }
1503         end_critical_section(S_DEBUGMEMLEAKS);
1504 }
1505
1506 char *tracked_strdup(const char *s, char *file, int line) {
1507         char *ptr;
1508
1509         if (s == NULL) return(NULL);
1510         ptr = tracked_malloc(strlen(s) + 1, file, line);
1511         if (ptr == NULL) return(NULL);
1512         strncpy(ptr, s, strlen(s));
1513         return(ptr);
1514 }
1515
1516 void dump_heap(void) {
1517         struct igheap *thisheap;
1518
1519         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1520                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1521                         thisheap->file, thisheap->line);
1522         }
1523 }
1524
1525 #endif /*  DEBUG_MEMORY_LEAKS */