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