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: %s\n",
 591                               __FUNCTION__,
 592                               Error);
 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, rlen, nlen, nrlen;
 674                 const char *pch;
 675
 676                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 677
 678                 fd = fopen(fn, "a+");
 679                 pch = ChrPtr(CCC->ReadBuf);
 680                 len = StrLength(CCC->ReadBuf);
 681                 if (CCC->Pos != NULL)
 682                         rlen = CC->Pos - pch;
 683                 else
 684                         rlen = 0;
 685
 686 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 687                         len, rlen, pch);
 688 */
 689                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 690                         len, rlen);
 691 #endif
 692                 rc = client_readline_sslbuffer(Target,
 693                                                CCC->ReadBuf,
 694                                                1);
 695 #ifdef BIGBAD_IODBG
 696                 pch = ChrPtr(CCC->ReadBuf);
 697                 nlen = StrLength(CCC->ReadBuf);
 698                 if (CCC->Pos != NULL)
 699                         nrlen = CC->Pos - pch;
 700                 else
 701                         nrlen = 0;
 702 /*
 703                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 704                         len, nlen, rlen, nrlen, pch);
 705 */
 706                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 707                         len, nlen, rlen, nrlen);
 708
 709                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 710                         StrLength(Target), ChrPtr(Target));
 711                 fclose(fd);
 712
 713                 if ((rc < 0) && (Error != NULL))
 714                         CtdlLogPrintf(CTDL_CRIT,
 715                                       "%s failed: %s\n",
 716                                       __FUNCTION__,
 717                                       Error);
 718 #endif
 719                 return rc;
 720         }
 721         else
 722 #endif
 723         {
 724 #ifdef BIGBAD_IODBG
 725                 char fn [SIZ];
 726                 FILE *fd;
 727                 int len, rlen, nlen, nrlen;
 728                 const char *pch;
 729
 730                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 731
 732                 fd = fopen(fn, "a+");
 733                 pch = ChrPtr(CCC->ReadBuf);
 734                 len = StrLength(CCC->ReadBuf);
 735                 if (CCC->Pos != NULL)
 736                         rlen = CC->Pos - pch;
 737                 else
 738                         rlen = 0;
 739
 740 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 741                         len, rlen, pch);
 742 */
 743                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 744                         len, rlen);
 745 #endif
 746                 rc = StrBufTCP_read_buffered_line_fast(Target,
 747                                                        CCC->ReadBuf,
 748                                                        &CCC->Pos,
 749                                                        &CCC->client_socket,
 750                                                        5,
 751                                                        1,
 752                                                        &Error);
 753
 754 #ifdef BIGBAD_IODBG
 755                 pch = ChrPtr(CCC->ReadBuf);
 756                 nlen = StrLength(CCC->ReadBuf);
 757                 if (CCC->Pos != NULL)
 758                         nrlen = CC->Pos - pch;
 759                 else
 760                         nrlen = 0;
 761 /*
 762                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 763                         len, nlen, rlen, nrlen, pch);
 764 */
 765                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 766                         len, nlen, rlen, nrlen);
 767
 768                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 769                         StrLength(Target), ChrPtr(Target));
 770                 fclose(fd);
 771
 772                 if ((rc < 0) && (Error != NULL))
 773                         CtdlLogPrintf(CTDL_CRIT,
 774                                       "%s failed: %s\n",
 775                                       __FUNCTION__,
 776                                       Error);
 777 #endif
 778                 return rc;
 779         }
 780 }
 781
 782
 783 /*
 784  * client_getln()   ...   Get a LF-terminated line of text from the client.
 785  * (This is implemented in terms of client_read() and could be
 786  * justifiably moved out of sysdep.c)
 787  */
 788 int client_getln(char *buf, int bufsize)
 789 {
 790         int i, retval;
 791         CitContext *CCC=CC;
 792         const char *pCh;
 793
 794         retval = CtdlClientGetLine(CCC->MigrateBuf);
 795         if (retval < 0)
 796           return(retval >= 0);
 797
 798
 799         i = StrLength(CCC->MigrateBuf);
 800         pCh = ChrPtr(CCC->MigrateBuf);
 801         /* Strip the trailing LF, and the trailing CR if present.
 802          */
 803         if (bufsize <= i)
 804                 i = bufsize - 1;
 805         while ( (i > 0)
 806                 && ( (pCh[i - 1]==13)
 807                      || ( pCh[i - 1]==10)) ) {
 808                 i--;
 809         }
 810         memcpy(buf, pCh, i);
 811         buf[i] = 0;
 812
 813         FlushStrBuf(CCC->MigrateBuf);
 814         if (retval < 0) {
 815                 safestrncpy(&buf[i], "000", bufsize - i);
 816         }
 817         return(retval >= 0);
 818 }
 819
 820
 821 /*
 822  * Cleanup any contexts that are left lying around
 823  */
 824
 825
 826 void close_masters (void)
 827 {
 828         struct ServiceFunctionHook *serviceptr;
 829
 830         /*
 831          * close all protocol master sockets
 832          */
 833         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 834             serviceptr = serviceptr->next ) {
 835
 836                 if (serviceptr->tcp_port > 0)
 837                 {
 838                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 839                                 serviceptr->tcp_port);
 840                         serviceptr->tcp_port = 0;
 841                 }
 842
 843                 if (serviceptr->sockpath != NULL)
 844                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 845                                 serviceptr->sockpath);
 846
 847                 close(serviceptr->msock);
 848                 /* If it's a Unix domain socket, remove the file. */
 849                 if (serviceptr->sockpath != NULL) {
 850                         unlink(serviceptr->sockpath);
 851                         serviceptr->sockpath = NULL;
 852                 }
 853         }
 854 }
 855
 856
 857 /*
 858  * The system-dependent part of master_cleanup() - close the master socket.
 859  */
 860 void sysdep_master_cleanup(void) {
 861
 862         close_masters();
 863
 864         context_cleanup();
 865
 866 #ifdef HAVE_OPENSSL
 867         destruct_ssl();
 868 #endif
 869         CtdlDestroyProtoHooks();
 870         CtdlDestroyDeleteHooks();
 871         CtdlDestroyXmsgHooks();
 872         CtdlDestroyNetprocHooks();
 873         CtdlDestroyUserHooks();
 874         CtdlDestroyMessageHook();
 875         CtdlDestroyCleanupHooks();
 876         CtdlDestroyFixedOutputHooks();
 877         CtdlDestroySessionHooks();
 878         CtdlDestroyServiceHook();
 879         CtdlDestroyRoomHooks();
 880         #ifdef HAVE_BACKTRACE
 881 ///     eCrash_Uninit();
 882         #endif
 883 }
 884
 885
 886
 887 pid_t current_child;
 888 void graceful_shutdown(int signum) {
 889         kill(current_child, signum);
 890         unlink(file_pid_file);
 891         exit(0);
 892 }
 893
 894 int nFireUps = 0;
 895 int nFireUpsNonRestart = 0;
 896 pid_t ForkedPid = 1;
 897
 898 /*
 899  * Start running as a daemon.
 900  */
 901 void start_daemon(int unused) {
 902         int status = 0;
 903         pid_t child = 0;
 904         FILE *fp;
 905         int do_restart = 0;
 906
 907         current_child = 0;
 908
 909         /* Close stdin/stdout/stderr and replace them with /dev/null.
 910          * We don't just call close() because we don't want these fd's
 911          * to be reused for other files.
 912          */
 913         if (chdir(ctdl_run_dir) != 0)
 914                 CtdlLogPrintf(CTDL_EMERG,
 915                               "unable to change into directory [%s]: %s",
 916                               ctdl_run_dir, strerror(errno));
 917
 918         child = fork();
 919         if (child != 0) {
 920                 exit(0);
 921         }
 922
 923         signal(SIGHUP, SIG_IGN);
 924         signal(SIGINT, SIG_IGN);
 925         signal(SIGQUIT, SIG_IGN);
 926
 927         setsid();
 928         umask(0);
 929         if ((freopen("/dev/null", "r", stdin) != stdin) ||
 930             (freopen("/dev/null", "w", stdout) != stdout) ||
 931             (freopen("/dev/null", "w", stderr) != stderr))
 932                 CtdlLogPrintf(CTDL_EMERG,
 933                               "unable to reopen stdin/out/err %s",
 934                               strerror(errno));
 935
 936
 937         do {
 938                 current_child = fork();
 939
 940                 signal(SIGTERM, graceful_shutdown);
 941
 942                 if (current_child < 0) {
 943                         perror("fork");
 944                         exit(errno);
 945                 }
 946
 947                 else if (current_child == 0) {
 948                         return; /* continue starting citadel. */
 949                 }
 950
 951                 else {
 952                         fp = fopen(file_pid_file, "w");
 953                         if (fp != NULL) {
 954                                 fprintf(fp, ""F_PID_T"\n", getpid());
 955                                 fclose(fp);
 956                         }
 957                         waitpid(current_child, &status, 0);
 958                 }
 959                 do_restart = 0;
 960                 nFireUpsNonRestart = nFireUps;
 961
 962                 /* Exit code 0 means the watcher should exit */
 963                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
 964                         do_restart = 0;
 965                 }
 966
 967                 /* Exit code 101-109 means the watcher should exit */
 968                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
 969                         do_restart = 0;
 970                 }
 971
 972                 /* Any other exit code, or no exit code, means we should restart. */
 973                 else {
 974                         do_restart = 1;
 975                         nFireUps++;
 976                         ForkedPid = current_child;
 977                 }
 978
 979         } while (do_restart);
 980
 981         unlink(file_pid_file);
 982         exit(WEXITSTATUS(status));
 983 }
 984
 985
 986
 987 void checkcrash(void)
 988 {
 989         if (nFireUpsNonRestart != nFireUps)
 990         {
 991                 StrBuf *CrashMail;
 992
 993                 CrashMail = NewStrBuf();
 994                 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
 995                 StrBufPrintf(CrashMail,
 996                         " \n"
 997                         " The Citadel server process (citserver) terminated unexpectedly."
 998                         "\n \n"
 999                         " This could be the result of a bug in the server program, or some external "
1000                         "factor.\n \n"
1001                         " You can obtain more information about this by enabling core dumps.\n \n"
1002                         " For more information, please see:\n \n"
1003                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1004                         "\n \n"
1005
1006                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1007                         ,
1008                         ctdl_run_dir, ForkedPid);
1009                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1010                 FreeStrBuf(&CrashMail);
1011         }
1012 }
1013
1014
1015 /*
1016  * Generic routine to convert a login name to a full name (gecos)
1017  * Returns nonzero if a conversion took place
1018  */
1019 int convert_login(char NameToConvert[]) {
1020         struct passwd *pw;
1021         int a;
1022
1023         pw = getpwnam(NameToConvert);
1024         if (pw == NULL) {
1025                 return(0);
1026         }
1027         else {
1028                 strcpy(NameToConvert, pw->pw_gecos);
1029                 for (a=0; a<strlen(NameToConvert); ++a) {
1030                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1031                 }
1032                 return(1);
1033         }
1034 }
1035
1036
1037
1038 /*
1039  * This loop just keeps going and going and going...
1040  */
1041 /*
1042  * FIXME:
1043  * This current implimentation of worker_thread creates a bottle neck in several situations
1044  * The first thing to remember is that a single thread can handle more than one connection at a time.
1045  * More threads mean less memory for the system to run in.
1046  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1047  * something to happen anywhere.
1048  * This current implimentation requires worker threads to wait in other locations, after it has
1049  * been committed to a single connection which is very wasteful.
1050  * As an extreme case consider this:
1051  * A slow client connects and this slow client sends only one character each second.
1052  * With this current implimentation a single worker thread is dispatched to handle that connection
1053  * until such times as the client timeout expires, an error occurs on the socket or the client
1054  * completes its transmission.
1055  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1056  * second interval between chars.
1057  *
1058  * It is my intention to re-write this code and the associated client_getln, client_read functions
1059  * to allow any thread to read data on behalf of any connection (context).
1060  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1061  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1062  * process it.
1063  * This worker thread loop also needs to be able to handle binary data.
1064  */
1065
1066 void *worker_thread(void *arg) {
1067         int highest;
1068         CitContext *ptr;
1069         CitContext *bind_me = NULL;
1070         fd_set readfds;
1071         int retval = 0;
1072         struct timeval tv;
1073         int force_purge = 0;
1074
1075
1076         while (!CtdlThreadCheckStop()) {
1077
1078                 /* make doubly sure we're not holding any stale db handles
1079                  * which might cause a deadlock.
1080                  */
1081                 cdb_check_handles();
1082 do_select:      force_purge = 0;
1083                 bind_me = NULL;         /* Which session shall we handle? */
1084
1085                 /* Initialize the fdset. */
1086                 FD_ZERO(&readfds);
1087                 highest = 0;
1088
1089                 begin_critical_section(S_SESSION_TABLE);
1090                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1091                         int client_socket;
1092                         client_socket = ptr->client_socket;
1093                         /* Dont select on dead sessions only truly idle ones */
1094                         if ((ptr->state == CON_IDLE) &&
1095                             (CC->kill_me == 0) &&
1096                             (client_socket != -1))
1097                         {
1098                                 FD_SET(client_socket, &readfds);
1099                                 if (client_socket > highest)
1100                                         highest = client_socket;
1101                         }
1102                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1103                                 bind_me = ptr;
1104                                 ptr->state = CON_EXECUTING;
1105                                 break;
1106                         }
1107                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1108                                 bind_me = ptr;
1109                                 ptr->state = CON_STARTING;
1110                                 break;
1111                         }
1112                 }
1113                 end_critical_section(S_SESSION_TABLE);
1114
1115                 if (bind_me) {
1116                         goto SKIP_SELECT;
1117                 }
1118
1119                 /* If we got this far, it means that there are no sessions
1120                  * which a previous thread marked for attention, so we go
1121                  * ahead and get ready to select().
1122                  */
1123
1124                 if (!CtdlThreadCheckStop()) {
1125                         tv.tv_sec = 1;          /* wake up every second if no input */
1126                         tv.tv_usec = 0;
1127                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1128                 }
1129                 else
1130                         return NULL;
1131
1132                 /* Now figure out who made this select() unblock.
1133                  * First, check for an error or exit condition.
1134                  */
1135                 if (retval < 0) {
1136                         if (errno == EBADF) {
1137                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1138                                         strerror(errno));
1139                                 goto do_select;
1140                         }
1141                         if (errno != EINTR) {
1142                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1143                                 CtdlThreadStopAll();
1144                                 continue;
1145                         } else {
1146                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1147                                 if (CtdlThreadCheckStop()) return(NULL);
1148                                 goto do_select;
1149                         }
1150                 }
1151                 else if(retval == 0) {
1152                         if (CtdlThreadCheckStop()) return(NULL);
1153                 }
1154
1155                 /* It must be a client socket.  Find a context that has data
1156                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1157                  * active sockets other than our chosen one are marked as
1158                  * CON_READY so the next thread that comes around can just bind
1159                  * to one without having to select() again.
1160                  */
1161                 begin_critical_section(S_SESSION_TABLE);
1162                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1163                         int checkfd = ptr->client_socket;
1164                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1165                                 if (FD_ISSET(checkfd, &readfds)) {
1166                                         ptr->input_waiting = 1;
1167                                         if (!bind_me) {
1168                                                 bind_me = ptr;  /* I choose you! */
1169                                                 bind_me->state = CON_EXECUTING;
1170                                         }
1171                                         else {
1172                                                 ptr->state = CON_READY;
1173                                         }
1174                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1175                                         if (!bind_me) {
1176                                                 bind_me = ptr;  /* I choose you! */
1177                                                 bind_me->state = CON_EXECUTING;
1178                                         }
1179                                         else {
1180                                                 ptr->state = CON_READY;
1181                                         }
1182                                 }
1183                         }
1184                 }
1185                 end_critical_section(S_SESSION_TABLE);
1186
1187 SKIP_SELECT:
1188                 /* We're bound to a session */
1189                 if (bind_me != NULL) {
1190                         become_session(bind_me);
1191
1192                         if (bind_me->state == CON_STARTING) {
1193                                 bind_me->state = CON_EXECUTING;
1194                                 begin_session(bind_me);
1195                                 bind_me->h_greeting_function();
1196                         }
1197                         /* If the client has sent a command, execute it. */
1198                         if (CC->input_waiting) {
1199                                 CC->h_command_function();
1200
1201                                 while (HaveMoreLinesWaiting(CC))
1202                                        CC->h_command_function();
1203
1204                                 CC->input_waiting = 0;
1205                         }
1206
1207                         /* If there are asynchronous messages waiting and the
1208                          * client supports it, do those now */
1209                         if ((CC->is_async) && (CC->async_waiting)
1210                            && (CC->h_async_function != NULL)) {
1211                                 CC->h_async_function();
1212                                 CC->async_waiting = 0;
1213                         }
1214
1215                         force_purge = CC->kill_me;
1216                         become_session(NULL);
1217                         bind_me->state = CON_IDLE;
1218                 }
1219
1220                 dead_session_purge(force_purge);
1221                 do_housekeeping();
1222         }
1223         /* If control reaches this point, the server is shutting down */
1224         return(NULL);
1225 }
1226
1227
1228
1229
1230 /*
1231  * A function to handle selecting on master sockets.
1232  * In other words it handles new connections.
1233  * It is a thread.
1234  */
1235 void *select_on_master (void *arg)
1236 {
1237         struct ServiceFunctionHook *serviceptr;
1238         fd_set master_fds;
1239         int highest;
1240         struct timeval tv;
1241         int ssock;                      /* Descriptor for client socket */
1242         CitContext *con= NULL;  /* Temporary context pointer */
1243         int m;
1244         int i;
1245         int retval;
1246
1247         while (!CtdlThreadCheckStop()) {
1248                 /* Initialize the fdset. */
1249                 FD_ZERO(&master_fds);
1250                 highest = 0;
1251
1252                 /* First, add the various master sockets to the fdset. */
1253                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1254                 serviceptr = serviceptr->next ) {
1255                         m = serviceptr->msock;
1256                         FD_SET(m, &master_fds);
1257                         if (m > highest) {
1258                                 highest = m;
1259                         }
1260                 }
1261
1262                 if (!CtdlThreadCheckStop()) {
1263                         tv.tv_sec = 60;         /* wake up every second if no input */
1264                         tv.tv_usec = 0;
1265                         retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1266                 }
1267                 else
1268                         return NULL;
1269
1270                 /* Now figure out who made this select() unblock.
1271                  * First, check for an error or exit condition.
1272                  */
1273                 if (retval < 0) {
1274                         if (errno == EBADF) {
1275                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1276                                         strerror(errno));
1277                                 continue;
1278                         }
1279                         if (errno != EINTR) {
1280                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1281                                 CtdlThreadStopAll();
1282                         } else {
1283                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1284                                 if (CtdlThreadCheckStop()) return(NULL);
1285                                 continue;
1286                         }
1287                 }
1288                 else if(retval == 0) {
1289                         if (CtdlThreadCheckStop()) return(NULL);
1290                         continue;
1291                 }
1292                 /* Next, check to see if it's a new client connecting
1293                  * on a master socket.
1294                  */
1295                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1296                      serviceptr = serviceptr->next ) {
1297
1298                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1299                                 ssock = accept(serviceptr->msock, NULL, 0);
1300                                 if (ssock >= 0) {
1301                                         CtdlLogPrintf(CTDL_DEBUG,
1302                                                 "New client socket %d\n",
1303                                                 ssock);
1304
1305                                         /* The master socket is non-blocking but the client
1306                                          * sockets need to be blocking, otherwise certain
1307                                          * operations barf on FreeBSD.  Not a fatal error.
1308                                          */
1309                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1310                                                 CtdlLogPrintf(CTDL_EMERG,
1311                                                         "citserver: Can't set socket to blocking: %s\n",
1312                                                         strerror(errno));
1313                                         }
1314
1315                                         /* New context will be created already
1316                                          * set up in the CON_EXECUTING state.
1317                                          */
1318                                         con = CreateNewContext();
1319
1320                                         /* Assign our new socket number to it. */
1321                                         con->client_socket = ssock;
1322                                         con->h_command_function =
1323                                                 serviceptr->h_command_function;
1324                                         con->h_async_function =
1325                                                 serviceptr->h_async_function;
1326                                         con->h_greeting_function = serviceptr->h_greeting_function;
1327                                         con->ServiceName =
1328                                                 serviceptr->ServiceName;
1329
1330                                         /* Determine whether it's a local socket */
1331                                         if (serviceptr->sockpath != NULL)
1332                                                 con->is_local_socket = 1;
1333
1334                                         /* Set the SO_REUSEADDR socket option */
1335                                         i = 1;
1336                                         setsockopt(ssock, SOL_SOCKET,
1337                                                 SO_REUSEADDR,
1338                                                 &i, sizeof(i));
1339
1340                                         con->state = CON_GREETING;
1341
1342                                         retval--;
1343                                         if (retval == 0)
1344                                                 break;
1345                                 }
1346                         }
1347                 }
1348         }
1349         return NULL;
1350 }
1351
1352
1353
1354 /*
1355  * SyslogFacility()
1356  * Translate text facility name to syslog.h defined value.
1357  */
1358 int SyslogFacility(char *name)
1359 {
1360         int i;
1361         struct
1362         {
1363                 int facility;
1364                 char *name;
1365         }   facTbl[] =
1366         {
1367                 {   LOG_KERN,   "kern"          },
1368                 {   LOG_USER,   "user"          },
1369                 {   LOG_MAIL,   "mail"          },
1370                 {   LOG_DAEMON, "daemon"        },
1371                 {   LOG_AUTH,   "auth"          },
1372                 {   LOG_SYSLOG, "syslog"        },
1373                 {   LOG_LPR,    "lpr"           },
1374                 {   LOG_NEWS,   "news"          },
1375                 {   LOG_UUCP,   "uucp"          },
1376                 {   LOG_LOCAL0, "local0"        },
1377                 {   LOG_LOCAL1, "local1"        },
1378                 {   LOG_LOCAL2, "local2"        },
1379                 {   LOG_LOCAL3, "local3"        },
1380                 {   LOG_LOCAL4, "local4"        },
1381                 {   LOG_LOCAL5, "local5"        },
1382                 {   LOG_LOCAL6, "local6"        },
1383                 {   LOG_LOCAL7, "local7"        },
1384                 {   0,            NULL          }
1385         };
1386         for(i = 0; facTbl[i].name != NULL; i++) {
1387                 if(!strcasecmp(name, facTbl[i].name))
1388                         return facTbl[i].facility;
1389         }
1390         enable_syslog = 0;
1391         return LOG_DAEMON;
1392 }
1393
1394
1395 /********** MEM CHEQQER ***********/
1396
1397 #ifdef DEBUG_MEMORY_LEAKS
1398
1399 #undef malloc
1400 #undef realloc
1401 #undef strdup
1402 #undef free
1403
1404 void *tracked_malloc(size_t size, char *file, int line) {
1405         struct igheap *thisheap;
1406         void *block;
1407
1408         block = malloc(size);
1409         if (block == NULL) return(block);
1410
1411         thisheap = malloc(sizeof(struct igheap));
1412         if (thisheap == NULL) {
1413                 free(block);
1414                 return(NULL);
1415         }
1416
1417         thisheap->block = block;
1418         strcpy(thisheap->file, file);
1419         thisheap->line = line;
1420
1421         begin_critical_section(S_DEBUGMEMLEAKS);
1422         thisheap->next = igheap;
1423         igheap = thisheap;
1424         end_critical_section(S_DEBUGMEMLEAKS);
1425
1426         return(block);
1427 }
1428
1429
1430 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1431         struct igheap *thisheap;
1432         void *block;
1433
1434         block = realloc(ptr, size);
1435         if (block == NULL) return(block);
1436
1437         thisheap = malloc(sizeof(struct igheap));
1438         if (thisheap == NULL) {
1439                 free(block);
1440                 return(NULL);
1441         }
1442
1443         thisheap->block = block;
1444         strcpy(thisheap->file, file);
1445         thisheap->line = line;
1446
1447         begin_critical_section(S_DEBUGMEMLEAKS);
1448         thisheap->next = igheap;
1449         igheap = thisheap;
1450         end_critical_section(S_DEBUGMEMLEAKS);
1451
1452         return(block);
1453 }
1454
1455
1456
1457 void tracked_free(void *ptr) {
1458         struct igheap *thisheap;
1459         struct igheap *trash;
1460
1461         free(ptr);
1462
1463         if (igheap == NULL) return;
1464         begin_critical_section(S_DEBUGMEMLEAKS);
1465         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1466                 if (thisheap->next != NULL) {
1467                         if (thisheap->next->block == ptr) {
1468                                 trash = thisheap->next;
1469                                 thisheap->next = thisheap->next->next;
1470                                 free(trash);
1471                         }
1472                 }
1473         }
1474         if (igheap->block == ptr) {
1475                 trash = igheap;
1476                 igheap = igheap->next;
1477                 free(trash);
1478         }
1479         end_critical_section(S_DEBUGMEMLEAKS);
1480 }
1481
1482 char *tracked_strdup(const char *s, char *file, int line) {
1483         char *ptr;
1484
1485         if (s == NULL) return(NULL);
1486         ptr = tracked_malloc(strlen(s) + 1, file, line);
1487         if (ptr == NULL) return(NULL);
1488         strncpy(ptr, s, strlen(s));
1489         return(ptr);
1490 }
1491
1492 void dump_heap(void) {
1493         struct igheap *thisheap;
1494
1495         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1496                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1497                         thisheap->file, thisheap->line);
1498         }
1499 }
1500
1501 #endif /*  DEBUG_MEMORY_LEAKS */