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(SIGUSR1, 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                 return client_readline_sslbuffer(Target,
 671                                                  CCC->ReadBuf,
 672                                                  1);
 673         }
 674         else
 675 #endif
 676         {
 677 #ifdef BIGBAD_IODBG
 678                 char fn [SIZ];
 679                 FILE *fd;
 680                 int len, rlen, nlen, nrlen;
 681                 const char *pch;
 682
 683                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 684
 685                 fd = fopen(fn, "a+");
 686                 pch = ChrPtr(CCC->ReadBuf);
 687                 len = StrLength(CCC->ReadBuf);
 688                 if (CCC->Pos != NULL)
 689                         rlen = CC->Pos - pch;
 690                 else
 691                         rlen = 0;
 692
 693 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 694                         len, rlen, pch);
 695 */
 696                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 697                         len, rlen);
 698 #endif
 699                 rc = StrBufTCP_read_buffered_line_fast(Target,
 700                                                        CCC->ReadBuf,
 701                                                        &CCC->Pos,
 702                                                        &CCC->client_socket,
 703                                                        5,
 704                                                        1,
 705                                                        &Error);
 706
 707 #ifdef BIGBAD_IODBG
 708                 pch = ChrPtr(CCC->ReadBuf);
 709                 nlen = StrLength(CCC->ReadBuf);
 710                 if (CCC->Pos != NULL)
 711                         nrlen = CC->Pos - pch;
 712                 else
 713                         nrlen = 0;
 714 /*
 715                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 716                         len, nlen, rlen, nrlen, pch);
 717 */
 718                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 719                         len, nlen, rlen, nrlen);
 720
 721                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 722                         StrLength(Target), ChrPtr(Target));
 723                 fclose(fd);
 724
 725                 if ((rc < 0) && (Error != NULL))
 726                         CtdlLogPrintf(CTDL_CRIT,
 727                                       "%s failed: %s\n",
 728                                       __FUNCTION__,
 729                                       Error);
 730 #endif
 731                 return rc;
 732         }
 733 }
 734
 735
 736 /*
 737  * client_getln()   ...   Get a LF-terminated line of text from the client.
 738  * (This is implemented in terms of client_read() and could be
 739  * justifiably moved out of sysdep.c)
 740  */
 741 int client_getln(char *buf, int bufsize)
 742 {
 743         int i, retval;
 744         CitContext *CCC=CC;
 745         const char *pCh;
 746
 747         retval = CtdlClientGetLine(CCC->MigrateBuf);
 748         if (retval < 0)
 749           return(retval >= 0);
 750
 751
 752         i = StrLength(CCC->MigrateBuf);
 753         pCh = ChrPtr(CCC->MigrateBuf);
 754         /* Strip the trailing LF, and the trailing CR if present.
 755          */
 756         if (bufsize <= i)
 757                 i = bufsize - 1;
 758         while ( (i > 0)
 759                 && ( (pCh[i - 1]==13)
 760                      || ( pCh[i - 1]==10)) ) {
 761                 i--;
 762         }
 763         memcpy(buf, pCh, i);
 764         buf[i] = 0;
 765
 766         FlushStrBuf(CCC->MigrateBuf);
 767         if (retval < 0) {
 768                 safestrncpy(&buf[i], "000", bufsize - i);
 769         }
 770         return(retval >= 0);
 771 }
 772
 773
 774 /*
 775  * Cleanup any contexts that are left lying around
 776  */
 777
 778
 779 void close_masters (void)
 780 {
 781         struct ServiceFunctionHook *serviceptr;
 782
 783         /*
 784          * close all protocol master sockets
 785          */
 786         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 787             serviceptr = serviceptr->next ) {
 788
 789                 if (serviceptr->tcp_port > 0)
 790                 {
 791                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 792                                 serviceptr->tcp_port);
 793                         serviceptr->tcp_port = 0;
 794                 }
 795
 796                 if (serviceptr->sockpath != NULL)
 797                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 798                                 serviceptr->sockpath);
 799
 800                 close(serviceptr->msock);
 801                 /* If it's a Unix domain socket, remove the file. */
 802                 if (serviceptr->sockpath != NULL) {
 803                         unlink(serviceptr->sockpath);
 804                         serviceptr->sockpath = NULL;
 805                 }
 806         }
 807 }
 808
 809
 810 /*
 811  * The system-dependent part of master_cleanup() - close the master socket.
 812  */
 813 void sysdep_master_cleanup(void) {
 814
 815         close_masters();
 816
 817         context_cleanup();
 818
 819 #ifdef HAVE_OPENSSL
 820         destruct_ssl();
 821 #endif
 822         CtdlDestroyProtoHooks();
 823         CtdlDestroyDeleteHooks();
 824         CtdlDestroyXmsgHooks();
 825         CtdlDestroyNetprocHooks();
 826         CtdlDestroyUserHooks();
 827         CtdlDestroyMessageHook();
 828         CtdlDestroyCleanupHooks();
 829         CtdlDestroyFixedOutputHooks();
 830         CtdlDestroySessionHooks();
 831         CtdlDestroyServiceHook();
 832         CtdlDestroyRoomHooks();
 833         #ifdef HAVE_BACKTRACE
 834 ///     eCrash_Uninit();
 835         #endif
 836 }
 837
 838
 839
 840 pid_t current_child;
 841 void graceful_shutdown(int signum) {
 842         kill(current_child, signum);
 843         unlink(file_pid_file);
 844         exit(0);
 845 }
 846
 847 int nFireUps = 0;
 848 int nFireUpsNonRestart = 0;
 849 pid_t ForkedPid = 1;
 850
 851 /*
 852  * Start running as a daemon.
 853  */
 854 void start_daemon(int unused) {
 855         int status = 0;
 856         pid_t child = 0;
 857         FILE *fp;
 858         int do_restart = 0;
 859
 860         current_child = 0;
 861
 862         /* Close stdin/stdout/stderr and replace them with /dev/null.
 863          * We don't just call close() because we don't want these fd's
 864          * to be reused for other files.
 865          */
 866         if (chdir(ctdl_run_dir) != 0)
 867                 CtdlLogPrintf(CTDL_EMERG,
 868                               "unable to change into directory [%s]: %s",
 869                               ctdl_run_dir, strerror(errno));
 870
 871         child = fork();
 872         if (child != 0) {
 873                 exit(0);
 874         }
 875
 876         signal(SIGHUP, SIG_IGN);
 877         signal(SIGINT, SIG_IGN);
 878         signal(SIGQUIT, SIG_IGN);
 879
 880         setsid();
 881         umask(0);
 882         if ((freopen("/dev/null", "r", stdin) != stdin) ||
 883             (freopen("/dev/null", "w", stdout) != stdout) ||
 884             (freopen("/dev/null", "w", stderr) != stderr))
 885                 CtdlLogPrintf(CTDL_EMERG,
 886                               "unable to reopen stdin/out/err %s",
 887                               strerror(errno));
 888
 889
 890         do {
 891                 current_child = fork();
 892
 893                 signal(SIGTERM, graceful_shutdown);
 894
 895                 if (current_child < 0) {
 896                         perror("fork");
 897                         exit(errno);
 898                 }
 899
 900                 else if (current_child == 0) {
 901                         return; /* continue starting citadel. */
 902                 }
 903
 904                 else {
 905                         fp = fopen(file_pid_file, "w");
 906                         if (fp != NULL) {
 907                                 fprintf(fp, ""F_PID_T"\n", getpid());
 908                                 fclose(fp);
 909                         }
 910                         waitpid(current_child, &status, 0);
 911                 }
 912                 do_restart = 0;
 913                 nFireUpsNonRestart = nFireUps;
 914
 915                 /* Exit code 0 means the watcher should exit */
 916                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
 917                         do_restart = 0;
 918                 }
 919
 920                 /* Exit code 101-109 means the watcher should exit */
 921                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
 922                         do_restart = 0;
 923                 }
 924
 925                 /* Any other exit code, or no exit code, means we should restart. */
 926                 else {
 927                         do_restart = 1;
 928                         nFireUps++;
 929                         ForkedPid = current_child;
 930                 }
 931
 932         } while (do_restart);
 933
 934         unlink(file_pid_file);
 935         exit(WEXITSTATUS(status));
 936 }
 937
 938
 939
 940 void checkcrash(void)
 941 {
 942         if (nFireUpsNonRestart != nFireUps)
 943         {
 944                 StrBuf *CrashMail;
 945
 946                 CrashMail = NewStrBuf();
 947                 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
 948                 StrBufPrintf(CrashMail,
 949                         " \n"
 950                         " The Citadel server process (citserver) terminated unexpectedly."
 951                         "\n \n"
 952                         " This could be the result of a bug in the server program, or some external "
 953                         "factor.\n \n"
 954                         " You can obtain more information about this by enabling core dumps.\n \n"
 955                         " For more information, please see:\n \n"
 956                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
 957                         "\n \n"
 958
 959                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
 960                         ,
 961                         ctdl_run_dir, ForkedPid);
 962                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
 963                 FreeStrBuf(&CrashMail);
 964         }
 965 }
 966
 967
 968 /*
 969  * Generic routine to convert a login name to a full name (gecos)
 970  * Returns nonzero if a conversion took place
 971  */
 972 int convert_login(char NameToConvert[]) {
 973         struct passwd *pw;
 974         int a;
 975
 976         pw = getpwnam(NameToConvert);
 977         if (pw == NULL) {
 978                 return(0);
 979         }
 980         else {
 981                 strcpy(NameToConvert, pw->pw_gecos);
 982                 for (a=0; a<strlen(NameToConvert); ++a) {
 983                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
 984                 }
 985                 return(1);
 986         }
 987 }
 988
 989
 990
 991 /*
 992  * This loop just keeps going and going and going...
 993  */
 994 /*
 995  * FIXME:
 996  * This current implimentation of worker_thread creates a bottle neck in several situations
 997  * The first thing to remember is that a single thread can handle more than one connection at a time.
 998  * More threads mean less memory for the system to run in.
 999  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1000  * something to happen anywhere.
1001  * This current implimentation requires worker threads to wait in other locations, after it has
1002  * been committed to a single connection which is very wasteful.
1003  * As an extreme case consider this:
1004  * A slow client connects and this slow client sends only one character each second.
1005  * With this current implimentation a single worker thread is dispatched to handle that connection
1006  * until such times as the client timeout expires, an error occurs on the socket or the client
1007  * completes its transmission.
1008  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1009  * second interval between chars.
1010  *
1011  * It is my intention to re-write this code and the associated client_getln, client_read functions
1012  * to allow any thread to read data on behalf of any connection (context).
1013  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1014  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1015  * process it.
1016  * This worker thread loop also needs to be able to handle binary data.
1017  */
1018
1019 void *worker_thread(void *arg) {
1020         int highest;
1021         CitContext *ptr;
1022         CitContext *bind_me = NULL;
1023         fd_set readfds;
1024         int retval = 0;
1025         struct timeval tv;
1026         int force_purge = 0;
1027
1028
1029         while (!CtdlThreadCheckStop()) {
1030
1031                 /* make doubly sure we're not holding any stale db handles
1032                  * which might cause a deadlock.
1033                  */
1034                 cdb_check_handles();
1035 do_select:      force_purge = 0;
1036                 bind_me = NULL;         /* Which session shall we handle? */
1037
1038                 /* Initialize the fdset. */
1039                 FD_ZERO(&readfds);
1040                 highest = 0;
1041
1042                 begin_critical_section(S_SESSION_TABLE);
1043                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1044                         int client_socket;
1045                         client_socket = ptr->client_socket;
1046                         /* Dont select on dead sessions only truly idle ones */
1047                         if ((ptr->state == CON_IDLE) &&
1048                             (CC->kill_me == 0) &&
1049                             (client_socket != -1))
1050                         {
1051                                 FD_SET(client_socket, &readfds);
1052                                 if (client_socket > highest)
1053                                         highest = client_socket;
1054                         }
1055                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1056                                 bind_me = ptr;
1057                                 ptr->state = CON_EXECUTING;
1058                                 break;
1059                         }
1060                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1061                                 bind_me = ptr;
1062                                 ptr->state = CON_STARTING;
1063                                 break;
1064                         }
1065                 }
1066                 end_critical_section(S_SESSION_TABLE);
1067
1068                 if (bind_me) {
1069                         goto SKIP_SELECT;
1070                 }
1071
1072                 /* If we got this far, it means that there are no sessions
1073                  * which a previous thread marked for attention, so we go
1074                  * ahead and get ready to select().
1075                  */
1076
1077                 if (!CtdlThreadCheckStop()) {
1078                         tv.tv_sec = 1;          /* wake up every second if no input */
1079                         tv.tv_usec = 0;
1080                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1081                 }
1082                 else
1083                         return NULL;
1084
1085                 /* Now figure out who made this select() unblock.
1086                  * First, check for an error or exit condition.
1087                  */
1088                 if (retval < 0) {
1089                         if (errno == EBADF) {
1090                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1091                                         strerror(errno));
1092                                 goto do_select;
1093                         }
1094                         if (errno != EINTR) {
1095                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1096                                 CtdlThreadStopAll();
1097                                 continue;
1098                         } else {
1099                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1100                                 if (CtdlThreadCheckStop()) return(NULL);
1101                                 goto do_select;
1102                         }
1103                 }
1104                 else if(retval == 0) {
1105                         if (CtdlThreadCheckStop()) return(NULL);
1106                 }
1107
1108                 /* It must be a client socket.  Find a context that has data
1109                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1110                  * active sockets other than our chosen one are marked as
1111                  * CON_READY so the next thread that comes around can just bind
1112                  * to one without having to select() again.
1113                  */
1114                 begin_critical_section(S_SESSION_TABLE);
1115                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1116                         int checkfd = ptr->client_socket;
1117                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1118                                 if (FD_ISSET(checkfd, &readfds)) {
1119                                         ptr->input_waiting = 1;
1120                                         if (!bind_me) {
1121                                                 bind_me = ptr;  /* I choose you! */
1122                                                 bind_me->state = CON_EXECUTING;
1123                                         }
1124                                         else {
1125                                                 ptr->state = CON_READY;
1126                                         }
1127                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1128                                         if (!bind_me) {
1129                                                 bind_me = ptr;  /* I choose you! */
1130                                                 bind_me->state = CON_EXECUTING;
1131                                         }
1132                                         else {
1133                                                 ptr->state = CON_READY;
1134                                         }
1135                                 }
1136                         }
1137                 }
1138                 end_critical_section(S_SESSION_TABLE);
1139
1140 SKIP_SELECT:
1141                 /* We're bound to a session */
1142                 if (bind_me != NULL) {
1143                         become_session(bind_me);
1144
1145                         if (bind_me->state == CON_STARTING) {
1146                                 bind_me->state = CON_EXECUTING;
1147                                 begin_session(bind_me);
1148                                 bind_me->h_greeting_function();
1149                         }
1150                         /* If the client has sent a command, execute it. */
1151                         if (CC->input_waiting) {
1152                                 CC->h_command_function();
1153
1154                                 while (HaveMoreLinesWaiting(CC))
1155                                        CC->h_command_function();
1156
1157                                 CC->input_waiting = 0;
1158                         }
1159
1160                         /* If there are asynchronous messages waiting and the
1161                          * client supports it, do those now */
1162                         if ((CC->is_async) && (CC->async_waiting)
1163                            && (CC->h_async_function != NULL)) {
1164                                 CC->h_async_function();
1165                                 CC->async_waiting = 0;
1166                         }
1167
1168                         force_purge = CC->kill_me;
1169                         become_session(NULL);
1170                         bind_me->state = CON_IDLE;
1171                 }
1172
1173                 dead_session_purge(force_purge);
1174                 do_housekeeping();
1175         }
1176         /* If control reaches this point, the server is shutting down */
1177         return(NULL);
1178 }
1179
1180
1181
1182
1183 /*
1184  * A function to handle selecting on master sockets.
1185  * In other words it handles new connections.
1186  * It is a thread.
1187  */
1188 void *select_on_master (void *arg)
1189 {
1190         struct ServiceFunctionHook *serviceptr;
1191         fd_set master_fds;
1192         int highest;
1193         struct timeval tv;
1194         int ssock;                      /* Descriptor for client socket */
1195         CitContext *con= NULL;  /* Temporary context pointer */
1196         int m;
1197         int i;
1198         int retval;
1199
1200         while (!CtdlThreadCheckStop()) {
1201                 /* Initialize the fdset. */
1202                 FD_ZERO(&master_fds);
1203                 highest = 0;
1204
1205                 /* First, add the various master sockets to the fdset. */
1206                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1207                 serviceptr = serviceptr->next ) {
1208                         m = serviceptr->msock;
1209                         FD_SET(m, &master_fds);
1210                         if (m > highest) {
1211                                 highest = m;
1212                         }
1213                 }
1214
1215                 if (!CtdlThreadCheckStop()) {
1216                         tv.tv_sec = 60;         /* wake up every second if no input */
1217                         tv.tv_usec = 0;
1218                         retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1219                 }
1220                 else
1221                         return NULL;
1222
1223                 /* Now figure out who made this select() unblock.
1224                  * First, check for an error or exit condition.
1225                  */
1226                 if (retval < 0) {
1227                         if (errno == EBADF) {
1228                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1229                                         strerror(errno));
1230                                 continue;
1231                         }
1232                         if (errno != EINTR) {
1233                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1234                                 CtdlThreadStopAll();
1235                         } else {
1236                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1237                                 if (CtdlThreadCheckStop()) return(NULL);
1238                                 continue;
1239                         }
1240                 }
1241                 else if(retval == 0) {
1242                         if (CtdlThreadCheckStop()) return(NULL);
1243                         continue;
1244                 }
1245                 /* Next, check to see if it's a new client connecting
1246                  * on a master socket.
1247                  */
1248                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1249                      serviceptr = serviceptr->next ) {
1250
1251                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1252                                 ssock = accept(serviceptr->msock, NULL, 0);
1253                                 if (ssock >= 0) {
1254                                         CtdlLogPrintf(CTDL_DEBUG,
1255                                                 "New client socket %d\n",
1256                                                 ssock);
1257
1258                                         /* The master socket is non-blocking but the client
1259                                          * sockets need to be blocking, otherwise certain
1260                                          * operations barf on FreeBSD.  Not a fatal error.
1261                                          */
1262                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1263                                                 CtdlLogPrintf(CTDL_EMERG,
1264                                                         "citserver: Can't set socket to blocking: %s\n",
1265                                                         strerror(errno));
1266                                         }
1267
1268                                         /* New context will be created already
1269                                          * set up in the CON_EXECUTING state.
1270                                          */
1271                                         con = CreateNewContext();
1272
1273                                         /* Assign our new socket number to it. */
1274                                         con->client_socket = ssock;
1275                                         con->h_command_function =
1276                                                 serviceptr->h_command_function;
1277                                         con->h_async_function =
1278                                                 serviceptr->h_async_function;
1279                                         con->h_greeting_function = serviceptr->h_greeting_function;
1280                                         con->ServiceName =
1281                                                 serviceptr->ServiceName;
1282
1283                                         /* Determine whether it's a local socket */
1284                                         if (serviceptr->sockpath != NULL)
1285                                                 con->is_local_socket = 1;
1286
1287                                         /* Set the SO_REUSEADDR socket option */
1288                                         i = 1;
1289                                         setsockopt(ssock, SOL_SOCKET,
1290                                                 SO_REUSEADDR,
1291                                                 &i, sizeof(i));
1292
1293                                         con->state = CON_GREETING;
1294
1295                                         retval--;
1296                                         if (retval == 0)
1297                                                 break;
1298                                 }
1299                         }
1300                 }
1301         }
1302         return NULL;
1303 }
1304
1305
1306
1307 /*
1308  * SyslogFacility()
1309  * Translate text facility name to syslog.h defined value.
1310  */
1311 int SyslogFacility(char *name)
1312 {
1313         int i;
1314         struct
1315         {
1316                 int facility;
1317                 char *name;
1318         }   facTbl[] =
1319         {
1320                 {   LOG_KERN,   "kern"          },
1321                 {   LOG_USER,   "user"          },
1322                 {   LOG_MAIL,   "mail"          },
1323                 {   LOG_DAEMON, "daemon"        },
1324                 {   LOG_AUTH,   "auth"          },
1325                 {   LOG_SYSLOG, "syslog"        },
1326                 {   LOG_LPR,    "lpr"           },
1327                 {   LOG_NEWS,   "news"          },
1328                 {   LOG_UUCP,   "uucp"          },
1329                 {   LOG_LOCAL0, "local0"        },
1330                 {   LOG_LOCAL1, "local1"        },
1331                 {   LOG_LOCAL2, "local2"        },
1332                 {   LOG_LOCAL3, "local3"        },
1333                 {   LOG_LOCAL4, "local4"        },
1334                 {   LOG_LOCAL5, "local5"        },
1335                 {   LOG_LOCAL6, "local6"        },
1336                 {   LOG_LOCAL7, "local7"        },
1337                 {   0,            NULL          }
1338         };
1339         for(i = 0; facTbl[i].name != NULL; i++) {
1340                 if(!strcasecmp(name, facTbl[i].name))
1341                         return facTbl[i].facility;
1342         }
1343         enable_syslog = 0;
1344         return LOG_DAEMON;
1345 }
1346
1347
1348 /********** MEM CHEQQER ***********/
1349
1350 #ifdef DEBUG_MEMORY_LEAKS
1351
1352 #undef malloc
1353 #undef realloc
1354 #undef strdup
1355 #undef free
1356
1357 void *tracked_malloc(size_t size, char *file, int line) {
1358         struct igheap *thisheap;
1359         void *block;
1360
1361         block = malloc(size);
1362         if (block == NULL) return(block);
1363
1364         thisheap = malloc(sizeof(struct igheap));
1365         if (thisheap == NULL) {
1366                 free(block);
1367                 return(NULL);
1368         }
1369
1370         thisheap->block = block;
1371         strcpy(thisheap->file, file);
1372         thisheap->line = line;
1373
1374         begin_critical_section(S_DEBUGMEMLEAKS);
1375         thisheap->next = igheap;
1376         igheap = thisheap;
1377         end_critical_section(S_DEBUGMEMLEAKS);
1378
1379         return(block);
1380 }
1381
1382
1383 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1384         struct igheap *thisheap;
1385         void *block;
1386
1387         block = realloc(ptr, size);
1388         if (block == NULL) return(block);
1389
1390         thisheap = malloc(sizeof(struct igheap));
1391         if (thisheap == NULL) {
1392                 free(block);
1393                 return(NULL);
1394         }
1395
1396         thisheap->block = block;
1397         strcpy(thisheap->file, file);
1398         thisheap->line = line;
1399
1400         begin_critical_section(S_DEBUGMEMLEAKS);
1401         thisheap->next = igheap;
1402         igheap = thisheap;
1403         end_critical_section(S_DEBUGMEMLEAKS);
1404
1405         return(block);
1406 }
1407
1408
1409
1410 void tracked_free(void *ptr) {
1411         struct igheap *thisheap;
1412         struct igheap *trash;
1413
1414         free(ptr);
1415
1416         if (igheap == NULL) return;
1417         begin_critical_section(S_DEBUGMEMLEAKS);
1418         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1419                 if (thisheap->next != NULL) {
1420                         if (thisheap->next->block == ptr) {
1421                                 trash = thisheap->next;
1422                                 thisheap->next = thisheap->next->next;
1423                                 free(trash);
1424                         }
1425                 }
1426         }
1427         if (igheap->block == ptr) {
1428                 trash = igheap;
1429                 igheap = igheap->next;
1430                 free(trash);
1431         }
1432         end_critical_section(S_DEBUGMEMLEAKS);
1433 }
1434
1435 char *tracked_strdup(const char *s, char *file, int line) {
1436         char *ptr;
1437
1438         if (s == NULL) return(NULL);
1439         ptr = tracked_malloc(strlen(s) + 1, file, line);
1440         if (ptr == NULL) return(NULL);
1441         strncpy(ptr, s, strlen(s));
1442         return(ptr);
1443 }
1444
1445 void dump_heap(void) {
1446         struct igheap *thisheap;
1447
1448         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1449                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1450                         thisheap->file, thisheap->line);
1451         }
1452 }
1453
1454 #endif /*  DEBUG_MEMORY_LEAKS */