citadel/sysdep.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel "system dependent" stuff.
   5  * See COPYING 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 #include "context.h"
  64
  65 #ifdef HAVE_SYS_SELECT_H
  66 #include <sys/select.h>
  67 #endif
  68
  69 #ifndef HAVE_SNPRINTF
  70 #include "snprintf.h"
  71 #endif
  72
  73 #include "ctdl_module.h"
  74 #include "threads.h"
  75 #include "user_ops.h"
  76 #include "control.h"
  77
  78
  79 #ifdef DEBUG_MEMORY_LEAKS
  80 struct igheap {
  81         struct igheap *next;
  82         char file[32];
  83         int line;
  84         void *block;
  85 };
  86
  87 struct igheap *igheap = NULL;
  88 #endif
  89
  90
  91 int verbosity = DEFAULT_VERBOSITY;              /* Logging level */
  92
  93 int syslog_facility = LOG_DAEMON;
  94 int enable_syslog = 0;
  95
  96
  97 /*
  98  * CtdlLogPrintf()  ...   Write logging information
  99  */
 100 void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
 101         va_list arg_ptr;
 102         va_start(arg_ptr, format);
 103         vCtdlLogPrintf(loglevel, format, arg_ptr);
 104         va_end(arg_ptr);
 105 }
 106
 107 void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
 108 {
 109         char buf[SIZ], buf2[SIZ];
 110
 111         if (enable_syslog) {
 112                 vsyslog((syslog_facility | loglevel), format, arg_ptr);
 113         }
 114
 115         /* stderr output code */
 116         if (enable_syslog || running_as_daemon) return;
 117
 118         /* if we run in forground and syslog is disabled, log to terminal */
 119         if (loglevel <= verbosity) {
 120                 struct timeval tv;
 121                 struct tm tim;
 122                 time_t unixtime;
 123                 CitContext *CCC = CC;
 124
 125                 gettimeofday(&tv, NULL);
 126                 /* Promote to time_t; types differ on some OSes (like darwin) */
 127                 unixtime = tv.tv_sec;
 128                 localtime_r(&unixtime, &tim);
 129                 if ((CCC != NULL) && (CCC->cs_pid != 0)) {
 130                         sprintf(buf,
 131                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
 132                                 tim.tm_year + 1900, tim.tm_mon + 1,
 133                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 134                                 tim.tm_sec, (long)tv.tv_usec,
 135                                 CCC->cs_pid);
 136                 } else {
 137                         sprintf(buf,
 138                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
 139                                 tim.tm_year + 1900, tim.tm_mon + 1,
 140                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 141                                 tim.tm_sec, (long)tv.tv_usec);
 142                 }
 143                 vsnprintf(buf2, SIZ, format, arg_ptr);
 144
 145                 fprintf(stderr, "%s%s", buf, buf2);
 146                 fflush(stderr);
 147         }
 148 }
 149
 150
 151
 152 /*
 153  * Signal handler to shut down the server.
 154  */
 155
 156 volatile int exit_signal = 0;
 157 volatile int shutdown_and_halt = 0;
 158 volatile int restart_server = 0;
 159 volatile int running_as_daemon = 0;
 160
 161 static RETSIGTYPE signal_cleanup(int signum) {
 162
 163         if (CT)
 164                 CT->signal = signum;
 165         else
 166         {
 167                 CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
 168                 exit_signal = signum;
 169         }
 170 }
 171
 172 static RETSIGTYPE signal_exit(int signum) {
 173         exit(1);
 174 }
 175
 176
 177
 178 /*
 179  * Some initialization stuff...
 180  */
 181 void init_sysdep(void) {
 182         sigset_t set;
 183
 184         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 185 #ifdef FD_SETSIZE
 186 #ifdef RLIMIT_NOFILE
 187         struct rlimit rl;
 188         getrlimit(RLIMIT_NOFILE, &rl);
 189         rl.rlim_cur = FD_SETSIZE;
 190         rl.rlim_max = FD_SETSIZE;
 191         setrlimit(RLIMIT_NOFILE, &rl);
 192 #endif
 193 #endif
 194
 195         /* If we've got OpenSSL, we're going to use it. */
 196 #ifdef HAVE_OPENSSL
 197         init_ssl();
 198 #endif
 199
 200         /*
 201          * Set up a place to put thread-specific data.
 202          * We only need a single pointer per thread - it points to the
 203          * CitContext structure (in the ContextList linked list) of the
 204          * session to which the calling thread is currently bound.
 205          */
 206         if (citthread_key_create(&MyConKey, NULL) != 0) {
 207                 CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
 208                         strerror(errno));
 209         }
 210
 211         /*
 212          * The action for unexpected signals and exceptions should be to
 213          * call signal_cleanup() to gracefully shut down the server.
 214          */
 215         sigemptyset(&set);
 216         sigaddset(&set, SIGINT);
 217         sigaddset(&set, SIGQUIT);
 218         sigaddset(&set, SIGHUP);
 219         sigaddset(&set, SIGTERM);
 220         // sigaddset(&set, SIGSEGV);    commented out because
 221         // sigaddset(&set, SIGILL);     we want core dumps
 222         // sigaddset(&set, SIGBUS);
 223         sigprocmask(SIG_UNBLOCK, &set, NULL);
 224
 225         signal(SIGINT, signal_cleanup);
 226         signal(SIGQUIT, signal_cleanup);
 227         signal(SIGHUP, signal_cleanup);
 228         signal(SIGTERM, signal_cleanup);
 229         signal(SIGUSR2, signal_exit);
 230         // signal(SIGSEGV, signal_cleanup);     commented out because
 231         // signal(SIGILL, signal_cleanup);      we want core dumps
 232         // signal(SIGBUS, signal_cleanup);
 233
 234         /*
 235          * Do not shut down the server on broken pipe signals, otherwise the
 236          * whole Citadel service would come down whenever a single client
 237          * socket breaks.
 238          */
 239         signal(SIGPIPE, SIG_IGN);
 240 }
 241
 242
 243
 244
 245 /*
 246  * This is a generic function to set up a master socket for listening on
 247  * a TCP port.  The server shuts down if the bind fails.
 248  *
 249  */
 250 int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
 251 {
 252         struct sockaddr_in sin;
 253         int s, i;
 254         int actual_queue_len;
 255
 256         actual_queue_len = queue_len;
 257         if (actual_queue_len < 5) actual_queue_len = 5;
 258
 259         memset(&sin, 0, sizeof(sin));
 260         sin.sin_family = AF_INET;
 261         sin.sin_port = htons((u_short)port_number);
 262         if (ip_addr == NULL) {
 263                 sin.sin_addr.s_addr = INADDR_ANY;
 264         }
 265         else {
 266                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 267         }
 268
 269         if (sin.sin_addr.s_addr == !INADDR_ANY) {
 270                 sin.sin_addr.s_addr = INADDR_ANY;
 271         }
 272
 273         s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 274
 275         if (s < 0) {
 276                 *errormessage = (char*) malloc(SIZ + 1);
 277                 snprintf(*errormessage, SIZ,
 278                                  "citserver: Can't create a socket: %s",
 279                                  strerror(errno));
 280                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 281                 return(-1);
 282         }
 283
 284         i = 1;
 285         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 286
 287         if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
 288                 *errormessage = (char*) malloc(SIZ + 1);
 289                 snprintf(*errormessage, SIZ,
 290                                  "citserver: Can't bind: %s",
 291                                  strerror(errno));
 292                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 293                 close(s);
 294                 return(-1);
 295         }
 296
 297         /* set to nonblock - we need this for some obscure situations */
 298         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 299                 *errormessage = (char*) malloc(SIZ + 1);
 300                 snprintf(*errormessage, SIZ,
 301                                  "citserver: Can't set socket to non-blocking: %s",
 302                                  strerror(errno));
 303                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 304                 close(s);
 305                 return(-1);
 306         }
 307
 308         if (listen(s, actual_queue_len) < 0) {
 309                 *errormessage = (char*) malloc(SIZ + 1);
 310                 snprintf(*errormessage, SIZ,
 311                                  "citserver: Can't listen: %s",
 312                                  strerror(errno));
 313                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 314                 close(s);
 315                 return(-1);
 316         }
 317
 318         return(s);
 319 }
 320
 321
 322
 323 /*
 324  * Create a Unix domain socket and listen on it
 325  */
 326 int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
 327 {
 328         struct sockaddr_un addr;
 329         int s;
 330         int i;
 331         int actual_queue_len;
 332 #ifdef HAVE_STRUCT_UCRED
 333         int passcred = 1;
 334 #endif
 335
 336         actual_queue_len = queue_len;
 337         if (actual_queue_len < 5) actual_queue_len = 5;
 338
 339         i = unlink(sockpath);
 340         if ((i != 0) && (errno != ENOENT)) {
 341                 *errormessage = (char*) malloc(SIZ + 1);
 342                 snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
 343                         sockpath, strerror(errno));
 344                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 345                 return(-1);
 346         }
 347
 348         memset(&addr, 0, sizeof(addr));
 349         addr.sun_family = AF_UNIX;
 350         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 351
 352         s = socket(AF_UNIX, SOCK_STREAM, 0);
 353         if (s < 0) {
 354                 *errormessage = (char*) malloc(SIZ + 1);
 355                 snprintf(*errormessage, SIZ,
 356                          "citserver: Can't create a socket: %s",
 357                          strerror(errno));
 358                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 359                 return(-1);
 360         }
 361
 362         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 363                 *errormessage = (char*) malloc(SIZ + 1);
 364                 snprintf(*errormessage, SIZ,
 365                          "citserver: Can't bind: %s",
 366                          strerror(errno));
 367                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 368                 return(-1);
 369         }
 370
 371         /* set to nonblock - we need this for some obscure situations */
 372         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 373                 *errormessage = (char*) malloc(SIZ + 1);
 374                 snprintf(*errormessage, SIZ,
 375                          "citserver: Can't set socket to non-blocking: %s",
 376                          strerror(errno));
 377                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 378                 close(s);
 379                 return(-1);
 380         }
 381
 382         if (listen(s, actual_queue_len) < 0) {
 383                 *errormessage = (char*) malloc(SIZ + 1);
 384                 snprintf(*errormessage, SIZ,
 385                          "citserver: Can't listen: %s",
 386                          strerror(errno));
 387                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 388                 return(-1);
 389         }
 390
 391 #ifdef HAVE_STRUCT_UCRED
 392         setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
 393 #endif
 394
 395         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 396         return(s);
 397 }
 398
 399
 400
 401 /*
 402  * The following functions implement output buffering on operating systems which
 403  * support it (such as Linux and various BSD flavors).
 404  */
 405 #ifndef HAVE_DARWIN
 406 #ifdef TCP_CORK
 407 #       define HAVE_TCP_BUFFERING
 408 #else
 409 #       ifdef TCP_NOPUSH
 410 #               define HAVE_TCP_BUFFERING
 411 #               define TCP_CORK TCP_NOPUSH
 412 #       endif
 413 #endif /* TCP_CORK */
 414 #endif /* HAVE_DARWIN */
 415
 416 static unsigned on = 1, off = 0;
 417
 418 void buffer_output(void) {
 419 #ifdef HAVE_TCP_BUFFERING
 420 #ifdef HAVE_OPENSSL
 421         if (!CC->redirect_ssl)
 422 #endif
 423                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 424 #endif
 425 }
 426
 427 void unbuffer_output(void) {
 428 #ifdef HAVE_TCP_BUFFERING
 429 #ifdef HAVE_OPENSSL
 430         if (!CC->redirect_ssl)
 431 #endif
 432                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 433 #endif
 434 }
 435
 436 void flush_output(void) {
 437 #ifdef HAVE_TCP_BUFFERING
 438         struct CitContext *CCC = CC;
 439         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 440         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 441 #endif
 442 }
 443
 444 /*
 445 static void flush_client_inbuf(void)
 446 {
 447         CitContext *CCC=CC;
 448
 449         FlushStrBuf(CCC->ReadBuf);
 450         CCC->Pos = NULL;
 451
 452 }
 453 */
 454
 455 /*
 456  * client_write()   ...    Send binary data to the client.
 457  */
 458 int client_write(const char *buf, int nbytes)
 459 {
 460         int bytes_written = 0;
 461         int retval;
 462 #ifndef HAVE_TCP_BUFFERING
 463         int old_buffer_len = 0;
 464 #endif
 465         fd_set wset;
 466         CitContext *Ctx;
 467         int fdflags;
 468
 469         if (nbytes < 1) return(0);
 470
 471 //      flush_client_inbuf();
 472         Ctx = CC;
 473         if (Ctx->redirect_buffer != NULL) {
 474                 StrBufAppendBufPlain(Ctx->redirect_buffer,
 475                                      buf, nbytes, 0);
 476                 return 0;
 477         }
 478
 479 #ifdef HAVE_OPENSSL
 480         if (Ctx->redirect_ssl) {
 481                 client_write_ssl(buf, nbytes);
 482                 return 0;
 483         }
 484 #endif
 485         if (Ctx->client_socket == -1) return -1;
 486
 487         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 488
 489         while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
 490                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 491                         FD_ZERO(&wset);
 492                         FD_SET(Ctx->client_socket, &wset);
 493                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 494                                 if (errno == EINTR)
 495                                 {
 496                                         CtdlLogPrintf(CTDL_DEBUG, "client_write(%d bytes) select() interrupted.\n", nbytes-bytes_written);
 497                                         if (CtdlThreadCheckStop()) {
 498                                                 CC->kill_me = 1;
 499                                                 return (-1);
 500                                         } else {
 501                                                 /* can't trust fd's and stuff so we need to re-create them */
 502                                                 continue;
 503                                         }
 504                                 } else {
 505                                         CtdlLogPrintf(CTDL_ERR,
 506                                                 "client_write(%d bytes) select failed: %s (%d)\n",
 507                                                 nbytes - bytes_written,
 508                                                 strerror(errno), errno);
 509                                         cit_backtrace();
 510                                         Ctx->kill_me = 1;
 511                                         return -1;
 512                                 }
 513                         }
 514                 }
 515
 516                 retval = write(Ctx->client_socket, &buf[bytes_written],
 517                         nbytes - bytes_written);
 518                 if (retval < 1) {
 519                         CtdlLogPrintf(CTDL_ERR,
 520                                 "client_write(%d bytes) failed: %s (%d)\n",
 521                                 nbytes - bytes_written,
 522                                 strerror(errno), errno);
 523                         cit_backtrace();
 524                         // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s",  &buf[bytes_written]);
 525                         Ctx->kill_me = 1;
 526                         return -1;
 527                 }
 528                 bytes_written = bytes_written + retval;
 529         }
 530         return 0;
 531 }
 532
 533 void cputbuf(const StrBuf *Buf) {
 534         client_write(ChrPtr(Buf), StrLength(Buf));
 535 }
 536
 537
 538 /*
 539  * cprintf()    Send formatted printable data to the client.
 540  *              Implemented in terms of client_write() so it's technically not sysdep...
 541  */
 542 void cprintf(const char *format, ...) {
 543         va_list arg_ptr;
 544         char buf[1024];
 545
 546         va_start(arg_ptr, format);
 547         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 548                 buf[sizeof buf - 2] = '\n';
 549         client_write(buf, strlen(buf));
 550         va_end(arg_ptr);
 551 }
 552
 553
 554 /*
 555  * Read data from the client socket.
 556  *
 557  * sock         socket fd to read from
 558  * buf          buffer to read into
 559  * bytes        number of bytes to read
 560  * timeout      Number of seconds to wait before timing out
 561  *
 562  * Possible return values:
 563  *      1       Requested number of bytes has been read.
 564  *      0       Request timed out.
 565  *      -1      Connection is broken, or other error.
 566  */
 567 int client_read_blob(StrBuf *Target, int bytes, int timeout)
 568 {
 569         CitContext *CCC=CC;
 570         const char *Error;
 571         int retval = 0;
 572
 573 #ifdef HAVE_OPENSSL
 574         if (CCC->redirect_ssl) {
 575                 retval = client_read_sslblob(Target, bytes, timeout);
 576         }
 577         else
 578 #endif
 579
 580                 retval = StrBufReadBLOBBuffered(Target,
 581                                                 CCC->ReadBuf,
 582                                                 &CCC->Pos,
 583                                                 &CCC->client_socket,
 584                                                 1,
 585                                                 bytes,
 586                                                 O_TERM,
 587                                                 &Error);
 588         if (retval < 0) {
 589                 CtdlLogPrintf(CTDL_CRIT,
 590                               "%s failed\n",
 591                               __FUNCTION__);
 592                 return -1;
 593         }
 594         else
 595         {
 596 #ifdef BIGBAD_IODBG
 597                 int rv = 0;
 598                 char fn [SIZ];
 599                 FILE *fd;
 600
 601                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 602
 603                 fd = fopen(fn, "a+");
 604                 fprintf(fd, "Read: BufSize: %d BufContent: [",
 605                         StrLength(Target));
 606                 rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 607                 fprintf(fd, "]\n");
 608
 609
 610                 fclose(fd);
 611 #endif
 612
 613         }
 614         return retval == bytes;
 615 }
 616
 617 int client_read_to(char *buf, int bytes, int timeout)
 618 {
 619         CitContext *CCC=CC;
 620         int rc;
 621
 622         rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
 623         if (rc < 0)
 624         {
 625                 *buf = '\0';
 626                 return rc;
 627         }
 628         else
 629         {
 630                 memcpy(buf,
 631                        ChrPtr(CCC->MigrateBuf),
 632                        StrLength(CCC->MigrateBuf) + 1);
 633                 FlushStrBuf(CCC->MigrateBuf);
 634                 return rc;
 635         }
 636 }
 637
 638
 639 int HaveMoreLinesWaiting(CitContext *CCC)
 640 {
 641         if ((CCC->kill_me == 1) || (
 642             (CCC->Pos == NULL) &&
 643             (StrLength(CCC->ReadBuf) == 0) &&
 644             (CCC->client_socket != -1)) )
 645                 return 0;
 646         else
 647                 return 1;
 648 }
 649
 650
 651 /*
 652  * Read data from the client socket with default timeout.
 653  * (This is implemented in terms of client_read_to() and could be
 654  * justifiably moved out of sysdep.c)
 655  */
 656 INLINE int client_read(char *buf, int bytes)
 657 {
 658         return(client_read_to(buf, bytes, config.c_sleeping));
 659 }
 660
 661 int CtdlClientGetLine(StrBuf *Target)
 662 {
 663         CitContext *CCC=CC;
 664         const char *Error;
 665         int rc;
 666
 667         FlushStrBuf(Target);
 668 #ifdef HAVE_OPENSSL
 669         if (CCC->redirect_ssl) {
 670 #ifdef BIGBAD_IODBG
 671                 char fn [SIZ];
 672                 FILE *fd;
 673                 int len = 0;
 674                 int rlen = 0;
 675                 int  nlen = 0;
 676                 int nrlen = 0;
 677                 const char *pch;
 678
 679                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 680
 681                 fd = fopen(fn, "a+");
 682                 pch = ChrPtr(CCC->ReadBuf);
 683                 len = StrLength(CCC->ReadBuf);
 684                 if (CCC->Pos != NULL)
 685                         rlen = CC->Pos - pch;
 686                 else
 687                         rlen = 0;
 688
 689 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 690                         len, rlen, pch);
 691 */
 692                 fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
 693                         len, rlen);
 694 #endif
 695                 rc = client_readline_sslbuffer(Target,
 696                                                CCC->ReadBuf,
 697                                                &CCC->Pos,
 698                                                1);
 699 #ifdef BIGBAD_IODBG
 700                 pch = ChrPtr(CCC->ReadBuf);
 701                 nlen = StrLength(CCC->ReadBuf);
 702                 if (CCC->Pos != NULL)
 703                         nrlen = CC->Pos - pch;
 704                 else
 705                         nrlen = 0;
 706 /*
 707                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 708                         len, nlen, rlen, nrlen, pch);
 709 */
 710                 fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 711                         len, nlen, rlen, nrlen);
 712
 713                 fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 714                         StrLength(Target), ChrPtr(Target));
 715                 fclose(fd);
 716
 717                 if (rc < 0)
 718                         CtdlLogPrintf(CTDL_CRIT,
 719                                       "%s failed\n",
 720                                       __FUNCTION__);
 721 #endif
 722                 return rc;
 723         }
 724         else
 725 #endif
 726         {
 727 #ifdef BIGBAD_IODBG
 728                 char fn [SIZ];
 729                 FILE *fd;
 730                 int len, rlen, nlen, nrlen;
 731                 const char *pch;
 732
 733                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 734
 735                 fd = fopen(fn, "a+");
 736                 pch = ChrPtr(CCC->ReadBuf);
 737                 len = StrLength(CCC->ReadBuf);
 738                 if (CCC->Pos != NULL)
 739                         rlen = CC->Pos - pch;
 740                 else
 741                         rlen = 0;
 742
 743 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 744                         len, rlen, pch);
 745 */
 746                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 747                         len, rlen);
 748 #endif
 749                 rc = StrBufTCP_read_buffered_line_fast(Target,
 750                                                        CCC->ReadBuf,
 751                                                        &CCC->Pos,
 752                                                        &CCC->client_socket,
 753                                                        5,
 754                                                        1,
 755                                                        &Error);
 756
 757 #ifdef BIGBAD_IODBG
 758                 pch = ChrPtr(CCC->ReadBuf);
 759                 nlen = StrLength(CCC->ReadBuf);
 760                 if (CCC->Pos != NULL)
 761                         nrlen = CC->Pos - pch;
 762                 else
 763                         nrlen = 0;
 764 /*
 765                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 766                         len, nlen, rlen, nrlen, pch);
 767 */
 768                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 769                         len, nlen, rlen, nrlen);
 770
 771                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 772                         StrLength(Target), ChrPtr(Target));
 773                 fclose(fd);
 774
 775                 if ((rc < 0) && (Error != NULL))
 776                         CtdlLogPrintf(CTDL_CRIT,
 777                                       "%s failed: %s\n",
 778                                       __FUNCTION__,
 779                                       Error);
 780 #endif
 781                 return rc;
 782         }
 783 }
 784
 785
 786 /*
 787  * client_getln()   ...   Get a LF-terminated line of text from the client.
 788  * (This is implemented in terms of client_read() and could be
 789  * justifiably moved out of sysdep.c)
 790  */
 791 int client_getln(char *buf, int bufsize)
 792 {
 793         int i, retval;
 794         CitContext *CCC=CC;
 795         const char *pCh;
 796
 797         retval = CtdlClientGetLine(CCC->MigrateBuf);
 798         if (retval < 0)
 799           return(retval >= 0);
 800
 801
 802         i = StrLength(CCC->MigrateBuf);
 803         pCh = ChrPtr(CCC->MigrateBuf);
 804         /* Strip the trailing LF, and the trailing CR if present.
 805          */
 806         if (bufsize <= i)
 807                 i = bufsize - 1;
 808         while ( (i > 0)
 809                 && ( (pCh[i - 1]==13)
 810                      || ( pCh[i - 1]==10)) ) {
 811                 i--;
 812         }
 813         memcpy(buf, pCh, i);
 814         buf[i] = 0;
 815
 816         FlushStrBuf(CCC->MigrateBuf);
 817         if (retval < 0) {
 818                 safestrncpy(&buf[i], "000", bufsize - i);
 819         }
 820         return(retval >= 0);
 821 }
 822
 823
 824 /*
 825  * Cleanup any contexts that are left lying around
 826  */
 827
 828
 829 void close_masters (void)
 830 {
 831         struct ServiceFunctionHook *serviceptr;
 832
 833         /*
 834          * close all protocol master sockets
 835          */
 836         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 837             serviceptr = serviceptr->next ) {
 838
 839                 if (serviceptr->tcp_port > 0)
 840                 {
 841                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 842                                 serviceptr->tcp_port);
 843                         serviceptr->tcp_port = 0;
 844                 }
 845
 846                 if (serviceptr->sockpath != NULL)
 847                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 848                                 serviceptr->sockpath);
 849
 850                 close(serviceptr->msock);
 851                 /* If it's a Unix domain socket, remove the file. */
 852                 if (serviceptr->sockpath != NULL) {
 853                         unlink(serviceptr->sockpath);
 854                         serviceptr->sockpath = NULL;
 855                 }
 856         }
 857 }
 858
 859
 860 /*
 861  * The system-dependent part of master_cleanup() - close the master socket.
 862  */
 863 void sysdep_master_cleanup(void) {
 864
 865         close_masters();
 866
 867         context_cleanup();
 868
 869 #ifdef HAVE_OPENSSL
 870         destruct_ssl();
 871 #endif
 872         CtdlDestroyProtoHooks();
 873         CtdlDestroyDeleteHooks();
 874         CtdlDestroyXmsgHooks();
 875         CtdlDestroyNetprocHooks();
 876         CtdlDestroyUserHooks();
 877         CtdlDestroyMessageHook();
 878         CtdlDestroyCleanupHooks();
 879         CtdlDestroyFixedOutputHooks();
 880         CtdlDestroySessionHooks();
 881         CtdlDestroyServiceHook();
 882         CtdlDestroyRoomHooks();
 883         #ifdef HAVE_BACKTRACE
 884 ///     eCrash_Uninit();
 885         #endif
 886 }
 887
 888
 889
 890 pid_t current_child;
 891 void graceful_shutdown(int signum) {
 892         kill(current_child, signum);
 893         unlink(file_pid_file);
 894         exit(0);
 895 }
 896
 897 int nFireUps = 0;
 898 int nFireUpsNonRestart = 0;
 899 pid_t ForkedPid = 1;
 900
 901 /*
 902  * Start running as a daemon.
 903  */
 904 void start_daemon(int unused) {
 905         int status = 0;
 906         pid_t child = 0;
 907         FILE *fp;
 908         int do_restart = 0;
 909
 910         current_child = 0;
 911
 912         /* Close stdin/stdout/stderr and replace them with /dev/null.
 913          * We don't just call close() because we don't want these fd's
 914          * to be reused for other files.
 915          */
 916         if (chdir(ctdl_run_dir) != 0)
 917                 CtdlLogPrintf(CTDL_EMERG,
 918                               "unable to change into directory [%s]: %s",
 919                               ctdl_run_dir, strerror(errno));
 920
 921         child = fork();
 922         if (child != 0) {
 923                 exit(0);
 924         }
 925
 926         signal(SIGHUP, SIG_IGN);
 927         signal(SIGINT, SIG_IGN);
 928         signal(SIGQUIT, SIG_IGN);
 929
 930         setsid();
 931         umask(0);
 932         if ((freopen("/dev/null", "r", stdin) != stdin) ||
 933             (freopen("/dev/null", "w", stdout) != stdout) ||
 934             (freopen("/dev/null", "w", stderr) != stderr))
 935                 CtdlLogPrintf(CTDL_EMERG,
 936                               "unable to reopen stdin/out/err %s",
 937                               strerror(errno));
 938
 939
 940         do {
 941                 current_child = fork();
 942
 943                 signal(SIGTERM, graceful_shutdown);
 944
 945                 if (current_child < 0) {
 946                         perror("fork");
 947                         exit(errno);
 948                 }
 949
 950                 else if (current_child == 0) {
 951                         return; /* continue starting citadel. */
 952                 }
 953
 954                 else {
 955                         fp = fopen(file_pid_file, "w");
 956                         if (fp != NULL) {
 957                                 fprintf(fp, ""F_PID_T"\n", getpid());
 958                                 fclose(fp);
 959                         }
 960                         waitpid(current_child, &status, 0);
 961                 }
 962                 do_restart = 0;
 963                 nFireUpsNonRestart = nFireUps;
 964
 965                 /* Exit code 0 means the watcher should exit */
 966                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
 967                         do_restart = 0;
 968                 }
 969
 970                 /* Exit code 101-109 means the watcher should exit */
 971                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
 972                         do_restart = 0;
 973                 }
 974
 975                 /* Any other exit code, or no exit code, means we should restart. */
 976                 else {
 977                         do_restart = 1;
 978                         nFireUps++;
 979                         ForkedPid = current_child;
 980                 }
 981
 982         } while (do_restart);
 983
 984         unlink(file_pid_file);
 985         exit(WEXITSTATUS(status));
 986 }
 987
 988
 989
 990 void checkcrash(void)
 991 {
 992         if (nFireUpsNonRestart != nFireUps)
 993         {
 994                 StrBuf *CrashMail;
 995
 996                 CrashMail = NewStrBuf();
 997                 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
 998                 StrBufPrintf(CrashMail,
 999                         " \n"
1000                         " The Citadel server process (citserver) terminated unexpectedly."
1001                         "\n \n"
1002                         " This could be the result of a bug in the server program, or some external "
1003                         "factor.\n \n"
1004                         " You can obtain more information about this by enabling core dumps.\n \n"
1005                         " For more information, please see:\n \n"
1006                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1007                         "\n \n"
1008
1009                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1010                         ,
1011                         ctdl_run_dir, ForkedPid);
1012                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1013                 FreeStrBuf(&CrashMail);
1014         }
1015 }
1016
1017
1018 /*
1019  * Generic routine to convert a login name to a full name (gecos)
1020  * Returns nonzero if a conversion took place
1021  */
1022 int convert_login(char NameToConvert[]) {
1023         struct passwd *pw;
1024         int a;
1025
1026         pw = getpwnam(NameToConvert);
1027         if (pw == NULL) {
1028                 return(0);
1029         }
1030         else {
1031                 strcpy(NameToConvert, pw->pw_gecos);
1032                 for (a=0; a<strlen(NameToConvert); ++a) {
1033                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1034                 }
1035                 return(1);
1036         }
1037 }
1038
1039
1040
1041 /*
1042  * This loop just keeps going and going and going...
1043  */
1044 /*
1045  * FIXME:
1046  * This current implimentation of worker_thread creates a bottle neck in several situations
1047  * The first thing to remember is that a single thread can handle more than one connection at a time.
1048  * More threads mean less memory for the system to run in.
1049  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1050  * something to happen anywhere.
1051  * This current implimentation requires worker threads to wait in other locations, after it has
1052  * been committed to a single connection which is very wasteful.
1053  * As an extreme case consider this:
1054  * A slow client connects and this slow client sends only one character each second.
1055  * With this current implimentation a single worker thread is dispatched to handle that connection
1056  * until such times as the client timeout expires, an error occurs on the socket or the client
1057  * completes its transmission.
1058  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1059  * second interval between chars.
1060  *
1061  * It is my intention to re-write this code and the associated client_getln, client_read functions
1062  * to allow any thread to read data on behalf of any connection (context).
1063  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1064  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1065  * process it.
1066  * This worker thread loop also needs to be able to handle binary data.
1067  */
1068
1069 void *worker_thread(void *arg) {
1070         int highest;
1071         CitContext *ptr;
1072         CitContext *bind_me = NULL;
1073         fd_set readfds;
1074         int retval = 0;
1075         struct timeval tv;
1076         int force_purge = 0;
1077
1078
1079         while (!CtdlThreadCheckStop()) {
1080
1081                 /* make doubly sure we're not holding any stale db handles
1082                  * which might cause a deadlock.
1083                  */
1084                 cdb_check_handles();
1085 do_select:      force_purge = 0;
1086                 bind_me = NULL;         /* Which session shall we handle? */
1087
1088                 /* Initialize the fdset. */
1089                 FD_ZERO(&readfds);
1090                 highest = 0;
1091
1092                 begin_critical_section(S_SESSION_TABLE);
1093                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1094                         int client_socket;
1095                         client_socket = ptr->client_socket;
1096                         /* Dont select on dead sessions only truly idle ones */
1097                         if ((ptr->state == CON_IDLE) &&
1098                             (CC->kill_me == 0) &&
1099                             (client_socket != -1))
1100                         {
1101                                 FD_SET(client_socket, &readfds);
1102                                 if (client_socket > highest)
1103                                         highest = client_socket;
1104                         }
1105                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1106                                 bind_me = ptr;
1107                                 ptr->state = CON_EXECUTING;
1108                                 break;
1109                         }
1110                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1111                                 bind_me = ptr;
1112                                 ptr->state = CON_STARTING;
1113                                 break;
1114                         }
1115                 }
1116                 end_critical_section(S_SESSION_TABLE);
1117
1118                 if (bind_me) {
1119                         goto SKIP_SELECT;
1120                 }
1121
1122                 /* If we got this far, it means that there are no sessions
1123                  * which a previous thread marked for attention, so we go
1124                  * ahead and get ready to select().
1125                  */
1126
1127                 if (!CtdlThreadCheckStop()) {
1128                         tv.tv_sec = 1;          /* wake up every second if no input */
1129                         tv.tv_usec = 0;
1130                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1131                 }
1132                 else
1133                         return NULL;
1134
1135                 /* Now figure out who made this select() unblock.
1136                  * First, check for an error or exit condition.
1137                  */
1138                 if (retval < 0) {
1139                         if (errno == EBADF) {
1140                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1141                                         strerror(errno));
1142                                 goto do_select;
1143                         }
1144                         if (errno != EINTR) {
1145                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1146                                 CtdlThreadStopAll();
1147                                 continue;
1148                         } else {
1149                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1150                                 if (CtdlThreadCheckStop()) return(NULL);
1151                                 goto do_select;
1152                         }
1153                 }
1154                 else if(retval == 0) {
1155                         if (CtdlThreadCheckStop()) return(NULL);
1156                 }
1157
1158                 /* It must be a client socket.  Find a context that has data
1159                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1160                  * active sockets other than our chosen one are marked as
1161                  * CON_READY so the next thread that comes around can just bind
1162                  * to one without having to select() again.
1163                  */
1164                 begin_critical_section(S_SESSION_TABLE);
1165                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1166                         int checkfd = ptr->client_socket;
1167                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1168                                 if (FD_ISSET(checkfd, &readfds)) {
1169                                         ptr->input_waiting = 1;
1170                                         if (!bind_me) {
1171                                                 bind_me = ptr;  /* I choose you! */
1172                                                 bind_me->state = CON_EXECUTING;
1173                                         }
1174                                         else {
1175                                                 ptr->state = CON_READY;
1176                                         }
1177                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1178                                         if (!bind_me) {
1179                                                 bind_me = ptr;  /* I choose you! */
1180                                                 bind_me->state = CON_EXECUTING;
1181                                         }
1182                                         else {
1183                                                 ptr->state = CON_READY;
1184                                         }
1185                                 }
1186                         }
1187                 }
1188                 end_critical_section(S_SESSION_TABLE);
1189
1190 SKIP_SELECT:
1191                 /* We're bound to a session */
1192                 if (bind_me != NULL) {
1193                         become_session(bind_me);
1194
1195                         if (bind_me->state == CON_STARTING) {
1196                                 bind_me->state = CON_EXECUTING;
1197                                 begin_session(bind_me);
1198                                 bind_me->h_greeting_function();
1199                         }
1200                         /* If the client has sent a command, execute it. */
1201                         if (CC->input_waiting) {
1202                                 CC->h_command_function();
1203
1204                                 while (HaveMoreLinesWaiting(CC))
1205                                        CC->h_command_function();
1206
1207                                 CC->input_waiting = 0;
1208                         }
1209
1210                         /* If there are asynchronous messages waiting and the
1211                          * client supports it, do those now */
1212                         if ((CC->is_async) && (CC->async_waiting)
1213                            && (CC->h_async_function != NULL)) {
1214                                 CC->h_async_function();
1215                                 CC->async_waiting = 0;
1216                         }
1217
1218                         force_purge = CC->kill_me;
1219                         become_session(NULL);
1220                         bind_me->state = CON_IDLE;
1221                 }
1222
1223                 dead_session_purge(force_purge);
1224                 do_housekeeping();
1225         }
1226         /* If control reaches this point, the server is shutting down */
1227         return(NULL);
1228 }
1229
1230
1231
1232
1233 /*
1234  * A function to handle selecting on master sockets.
1235  * In other words it handles new connections.
1236  * It is a thread.
1237  */
1238 void *select_on_master (void *arg)
1239 {
1240         struct ServiceFunctionHook *serviceptr;
1241         fd_set master_fds;
1242         int highest;
1243         struct timeval tv;
1244         int ssock;                      /* Descriptor for client socket */
1245         CitContext *con= NULL;  /* Temporary context pointer */
1246         int m;
1247         int i;
1248         int retval;
1249
1250         while (!CtdlThreadCheckStop()) {
1251                 /* Initialize the fdset. */
1252                 FD_ZERO(&master_fds);
1253                 highest = 0;
1254
1255                 /* First, add the various master sockets to the fdset. */
1256                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1257                 serviceptr = serviceptr->next ) {
1258                         m = serviceptr->msock;
1259                         FD_SET(m, &master_fds);
1260                         if (m > highest) {
1261                                 highest = m;
1262                         }
1263                 }
1264
1265                 if (!CtdlThreadCheckStop()) {
1266                         tv.tv_sec = 60;         /* wake up every second if no input */
1267                         tv.tv_usec = 0;
1268                         retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1269                 }
1270                 else
1271                         return NULL;
1272
1273                 /* Now figure out who made this select() unblock.
1274                  * First, check for an error or exit condition.
1275                  */
1276                 if (retval < 0) {
1277                         if (errno == EBADF) {
1278                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1279                                         strerror(errno));
1280                                 continue;
1281                         }
1282                         if (errno != EINTR) {
1283                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1284                                 CtdlThreadStopAll();
1285                         } else {
1286                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1287                                 if (CtdlThreadCheckStop()) return(NULL);
1288                                 continue;
1289                         }
1290                 }
1291                 else if(retval == 0) {
1292                         if (CtdlThreadCheckStop()) return(NULL);
1293                         continue;
1294                 }
1295                 /* Next, check to see if it's a new client connecting
1296                  * on a master socket.
1297                  */
1298                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1299                      serviceptr = serviceptr->next ) {
1300
1301                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1302                                 ssock = accept(serviceptr->msock, NULL, 0);
1303                                 if (ssock >= 0) {
1304                                         CtdlLogPrintf(CTDL_DEBUG,
1305                                                 "New client socket %d\n",
1306                                                 ssock);
1307
1308                                         /* The master socket is non-blocking but the client
1309                                          * sockets need to be blocking, otherwise certain
1310                                          * operations barf on FreeBSD.  Not a fatal error.
1311                                          */
1312                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1313                                                 CtdlLogPrintf(CTDL_EMERG,
1314                                                         "citserver: Can't set socket to blocking: %s\n",
1315                                                         strerror(errno));
1316                                         }
1317
1318                                         /* New context will be created already
1319                                          * set up in the CON_EXECUTING state.
1320                                          */
1321                                         con = CreateNewContext();
1322
1323                                         /* Assign our new socket number to it. */
1324                                         con->client_socket = ssock;
1325                                         con->h_command_function =
1326                                                 serviceptr->h_command_function;
1327                                         con->h_async_function =
1328                                                 serviceptr->h_async_function;
1329                                         con->h_greeting_function = serviceptr->h_greeting_function;
1330                                         con->ServiceName =
1331                                                 serviceptr->ServiceName;
1332
1333                                         /* Determine whether it's a local socket */
1334                                         if (serviceptr->sockpath != NULL)
1335                                                 con->is_local_socket = 1;
1336
1337                                         /* Set the SO_REUSEADDR socket option */
1338                                         i = 1;
1339                                         setsockopt(ssock, SOL_SOCKET,
1340                                                 SO_REUSEADDR,
1341                                                 &i, sizeof(i));
1342
1343                                         con->state = CON_GREETING;
1344
1345                                         retval--;
1346                                         if (retval == 0)
1347                                                 break;
1348                                 }
1349                         }
1350                 }
1351         }
1352         return NULL;
1353 }
1354
1355
1356
1357 /*
1358  * SyslogFacility()
1359  * Translate text facility name to syslog.h defined value.
1360  */
1361 int SyslogFacility(char *name)
1362 {
1363         int i;
1364         struct
1365         {
1366                 int facility;
1367                 char *name;
1368         }   facTbl[] =
1369         {
1370                 {   LOG_KERN,   "kern"          },
1371                 {   LOG_USER,   "user"          },
1372                 {   LOG_MAIL,   "mail"          },
1373                 {   LOG_DAEMON, "daemon"        },
1374                 {   LOG_AUTH,   "auth"          },
1375                 {   LOG_SYSLOG, "syslog"        },
1376                 {   LOG_LPR,    "lpr"           },
1377                 {   LOG_NEWS,   "news"          },
1378                 {   LOG_UUCP,   "uucp"          },
1379                 {   LOG_LOCAL0, "local0"        },
1380                 {   LOG_LOCAL1, "local1"        },
1381                 {   LOG_LOCAL2, "local2"        },
1382                 {   LOG_LOCAL3, "local3"        },
1383                 {   LOG_LOCAL4, "local4"        },
1384                 {   LOG_LOCAL5, "local5"        },
1385                 {   LOG_LOCAL6, "local6"        },
1386                 {   LOG_LOCAL7, "local7"        },
1387                 {   0,            NULL          }
1388         };
1389         for(i = 0; facTbl[i].name != NULL; i++) {
1390                 if(!strcasecmp(name, facTbl[i].name))
1391                         return facTbl[i].facility;
1392         }
1393         enable_syslog = 0;
1394         return LOG_DAEMON;
1395 }
1396
1397
1398 /********** MEM CHEQQER ***********/
1399
1400 #ifdef DEBUG_MEMORY_LEAKS
1401
1402 #undef malloc
1403 #undef realloc
1404 #undef strdup
1405 #undef free
1406
1407 void *tracked_malloc(size_t size, char *file, int line) {
1408         struct igheap *thisheap;
1409         void *block;
1410
1411         block = malloc(size);
1412         if (block == NULL) return(block);
1413
1414         thisheap = malloc(sizeof(struct igheap));
1415         if (thisheap == NULL) {
1416                 free(block);
1417                 return(NULL);
1418         }
1419
1420         thisheap->block = block;
1421         strcpy(thisheap->file, file);
1422         thisheap->line = line;
1423
1424         begin_critical_section(S_DEBUGMEMLEAKS);
1425         thisheap->next = igheap;
1426         igheap = thisheap;
1427         end_critical_section(S_DEBUGMEMLEAKS);
1428
1429         return(block);
1430 }
1431
1432
1433 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1434         struct igheap *thisheap;
1435         void *block;
1436
1437         block = realloc(ptr, size);
1438         if (block == NULL) return(block);
1439
1440         thisheap = malloc(sizeof(struct igheap));
1441         if (thisheap == NULL) {
1442                 free(block);
1443                 return(NULL);
1444         }
1445
1446         thisheap->block = block;
1447         strcpy(thisheap->file, file);
1448         thisheap->line = line;
1449
1450         begin_critical_section(S_DEBUGMEMLEAKS);
1451         thisheap->next = igheap;
1452         igheap = thisheap;
1453         end_critical_section(S_DEBUGMEMLEAKS);
1454
1455         return(block);
1456 }
1457
1458
1459
1460 void tracked_free(void *ptr) {
1461         struct igheap *thisheap;
1462         struct igheap *trash;
1463
1464         free(ptr);
1465
1466         if (igheap == NULL) return;
1467         begin_critical_section(S_DEBUGMEMLEAKS);
1468         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1469                 if (thisheap->next != NULL) {
1470                         if (thisheap->next->block == ptr) {
1471                                 trash = thisheap->next;
1472                                 thisheap->next = thisheap->next->next;
1473                                 free(trash);
1474                         }
1475                 }
1476         }
1477         if (igheap->block == ptr) {
1478                 trash = igheap;
1479                 igheap = igheap->next;
1480                 free(trash);
1481         }
1482         end_critical_section(S_DEBUGMEMLEAKS);
1483 }
1484
1485 char *tracked_strdup(const char *s, char *file, int line) {
1486         char *ptr;
1487
1488         if (s == NULL) return(NULL);
1489         ptr = tracked_malloc(strlen(s) + 1, file, line);
1490         if (ptr == NULL) return(NULL);
1491         strncpy(ptr, s, strlen(s));
1492         return(ptr);
1493 }
1494
1495 void dump_heap(void) {
1496         struct igheap *thisheap;
1497
1498         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1499                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1500                         thisheap->file, thisheap->line);
1501         }
1502 }
1503
1504 #endif /*  DEBUG_MEMORY_LEAKS */