citadel/sysdep.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel "system dependent" stuff.
   5  * See COPYING for copyright information.
   6  *
   7  * Here's where we (hopefully) have most parts of the Citadel server that
   8  * would need to be altered to run the server in a non-POSIX environment.
   9  *
  10  * If we ever port to a different platform and either have multiple
  11  * variants of this file or simply load it up with #ifdefs.
  12  *
  13  */
  14
  15 #include "sysdep.h"
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <stdio.h>
  19 #include <fcntl.h>
  20 #include <ctype.h>
  21 #include <signal.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <sys/wait.h>
  25 #include <sys/socket.h>
  26 #include <syslog.h>
  27 #include <sys/syslog.h>
  28
  29 #if TIME_WITH_SYS_TIME
  30 # include <sys/time.h>
  31 # include <time.h>
  32 #else
  33 # if HAVE_SYS_TIME_H
  34 #  include <sys/time.h>
  35 # else
  36 #  include <time.h>
  37 # endif
  38 #endif
  39
  40 #include <limits.h>
  41 #include <sys/resource.h>
  42 #include <netinet/in.h>
  43 #include <netinet/tcp.h>
  44 #include <arpa/inet.h>
  45 #include <netdb.h>
  46 #include <sys/un.h>
  47 #include <string.h>
  48 #include <pwd.h>
  49 #include <errno.h>
  50 #include <stdarg.h>
  51 #include <grp.h>
  52 #include <libcitadel.h>
  53 #include "citadel.h"
  54 #include "server.h"
  55 #include "sysdep_decls.h"
  56 #include "citserver.h"
  57 #include "support.h"
  58 #include "config.h"
  59 #include "database.h"
  60 #include "housekeeping.h"
  61 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
  62 #include "ecrash.h"
  63 #include "context.h"
  64
  65 #ifdef HAVE_SYS_SELECT_H
  66 #include <sys/select.h>
  67 #endif
  68
  69 #ifndef HAVE_SNPRINTF
  70 #include "snprintf.h"
  71 #endif
  72
  73 #include "ctdl_module.h"
  74 #include "threads.h"
  75 #include "user_ops.h"
  76 #include "control.h"
  77
  78
  79 #ifdef DEBUG_MEMORY_LEAKS
  80 struct igheap {
  81         struct igheap *next;
  82         char file[32];
  83         int line;
  84         void *block;
  85 };
  86
  87 struct igheap *igheap = NULL;
  88 #endif
  89
  90
  91 int verbosity = DEFAULT_VERBOSITY;              /* Logging level */
  92
  93 int syslog_facility = LOG_DAEMON;
  94 int enable_syslog = 0;
  95
  96
  97 /*
  98  * CtdlLogPrintf()  ...   Write logging information
  99  */
 100 void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
 101         va_list arg_ptr;
 102         va_start(arg_ptr, format);
 103         vCtdlLogPrintf(loglevel, format, arg_ptr);
 104         va_end(arg_ptr);
 105 }
 106
 107 void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
 108 {
 109         char buf[SIZ], buf2[SIZ];
 110
 111         if (enable_syslog) {
 112                 vsyslog((syslog_facility | loglevel), format, arg_ptr);
 113         }
 114
 115         /* stderr output code */
 116         if (enable_syslog || running_as_daemon) return;
 117
 118         /* if we run in forground and syslog is disabled, log to terminal */
 119         if (loglevel <= verbosity) {
 120                 struct timeval tv;
 121                 struct tm tim;
 122                 time_t unixtime;
 123                 CitContext *CCC = CC;
 124
 125                 gettimeofday(&tv, NULL);
 126                 /* Promote to time_t; types differ on some OSes (like darwin) */
 127                 unixtime = tv.tv_sec;
 128                 localtime_r(&unixtime, &tim);
 129                 if ((CCC != NULL) && (CCC->cs_pid != 0)) {
 130                         sprintf(buf,
 131                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
 132                                 tim.tm_year + 1900, tim.tm_mon + 1,
 133                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 134                                 tim.tm_sec, (long)tv.tv_usec,
 135                                 CCC->cs_pid);
 136                 } else {
 137                         sprintf(buf,
 138                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
 139                                 tim.tm_year + 1900, tim.tm_mon + 1,
 140                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 141                                 tim.tm_sec, (long)tv.tv_usec);
 142                 }
 143                 vsnprintf(buf2, SIZ, format, arg_ptr);
 144
 145                 fprintf(stderr, "%s%s", buf, buf2);
 146                 fflush(stderr);
 147         }
 148 }
 149
 150
 151
 152 /*
 153  * Signal handler to shut down the server.
 154  */
 155
 156 volatile int exit_signal = 0;
 157 volatile int shutdown_and_halt = 0;
 158 volatile int restart_server = 0;
 159 volatile int running_as_daemon = 0;
 160
 161 static RETSIGTYPE signal_cleanup(int signum) {
 162
 163         if (CT)
 164                 CT->signal = signum;
 165         else
 166         {
 167                 CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
 168                 exit_signal = signum;
 169         }
 170 }
 171
 172 static RETSIGTYPE signal_exit(int signum) {
 173         exit(1);
 174 }
 175
 176
 177
 178 /*
 179  * Some initialization stuff...
 180  */
 181 void init_sysdep(void) {
 182         sigset_t set;
 183
 184         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 185 #ifdef FD_SETSIZE
 186 #ifdef RLIMIT_NOFILE
 187         struct rlimit rl;
 188         getrlimit(RLIMIT_NOFILE, &rl);
 189         rl.rlim_cur = FD_SETSIZE;
 190         rl.rlim_max = FD_SETSIZE;
 191         setrlimit(RLIMIT_NOFILE, &rl);
 192 #endif
 193 #endif
 194
 195         /* If we've got OpenSSL, we're going to use it. */
 196 #ifdef HAVE_OPENSSL
 197         init_ssl();
 198 #endif
 199
 200         /*
 201          * Set up a place to put thread-specific data.
 202          * We only need a single pointer per thread - it points to the
 203          * CitContext structure (in the ContextList linked list) of the
 204          * session to which the calling thread is currently bound.
 205          */
 206         if (citthread_key_create(&MyConKey, NULL) != 0) {
 207                 CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
 208                         strerror(errno));
 209         }
 210
 211         /*
 212          * The action for unexpected signals and exceptions should be to
 213          * call signal_cleanup() to gracefully shut down the server.
 214          */
 215         sigemptyset(&set);
 216         sigaddset(&set, SIGINT);
 217         sigaddset(&set, SIGQUIT);
 218         sigaddset(&set, SIGHUP);
 219         sigaddset(&set, SIGTERM);
 220         // sigaddset(&set, SIGSEGV);    commented out because
 221         // sigaddset(&set, SIGILL);     we want core dumps
 222         // sigaddset(&set, SIGBUS);
 223         sigprocmask(SIG_UNBLOCK, &set, NULL);
 224
 225         signal(SIGINT, signal_cleanup);
 226         signal(SIGQUIT, signal_cleanup);
 227         signal(SIGHUP, signal_cleanup);
 228         signal(SIGTERM, signal_cleanup);
 229         signal(SIGUSR2, signal_exit);
 230         // signal(SIGSEGV, signal_cleanup);     commented out because
 231         // signal(SIGILL, signal_cleanup);      we want core dumps
 232         // signal(SIGBUS, signal_cleanup);
 233
 234         /*
 235          * Do not shut down the server on broken pipe signals, otherwise the
 236          * whole Citadel service would come down whenever a single client
 237          * socket breaks.
 238          */
 239         signal(SIGPIPE, SIG_IGN);
 240 }
 241
 242
 243
 244
 245 /*
 246  * This is a generic function to set up a master socket for listening on
 247  * a TCP port.  The server shuts down if the bind fails.
 248  *
 249  */
 250 int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
 251 {
 252         struct sockaddr_in sin;
 253         int s, i;
 254         int actual_queue_len;
 255
 256         actual_queue_len = queue_len;
 257         if (actual_queue_len < 5) actual_queue_len = 5;
 258
 259         memset(&sin, 0, sizeof(sin));
 260         sin.sin_family = AF_INET;
 261         sin.sin_port = htons((u_short)port_number);
 262         if (ip_addr == NULL) {
 263                 sin.sin_addr.s_addr = INADDR_ANY;
 264         }
 265         else {
 266                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 267         }
 268
 269         if (sin.sin_addr.s_addr == !INADDR_ANY) {
 270                 sin.sin_addr.s_addr = INADDR_ANY;
 271         }
 272
 273         s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 274
 275         if (s < 0) {
 276                 *errormessage = (char*) malloc(SIZ + 1);
 277                 snprintf(*errormessage, SIZ,
 278                                  "citserver: Can't create a socket: %s",
 279                                  strerror(errno));
 280                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 281                 return(-1);
 282         }
 283
 284         i = 1;
 285         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 286
 287         if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
 288                 *errormessage = (char*) malloc(SIZ + 1);
 289                 snprintf(*errormessage, SIZ,
 290                                  "citserver: Can't bind: %s",
 291                                  strerror(errno));
 292                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 293                 close(s);
 294                 return(-1);
 295         }
 296
 297         /* set to nonblock - we need this for some obscure situations */
 298         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 299                 *errormessage = (char*) malloc(SIZ + 1);
 300                 snprintf(*errormessage, SIZ,
 301                                  "citserver: Can't set socket to non-blocking: %s",
 302                                  strerror(errno));
 303                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 304                 close(s);
 305                 return(-1);
 306         }
 307
 308         if (listen(s, actual_queue_len) < 0) {
 309                 *errormessage = (char*) malloc(SIZ + 1);
 310                 snprintf(*errormessage, SIZ,
 311                                  "citserver: Can't listen: %s",
 312                                  strerror(errno));
 313                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 314                 close(s);
 315                 return(-1);
 316         }
 317
 318         return(s);
 319 }
 320
 321
 322
 323 /*
 324  * Create a Unix domain socket and listen on it
 325  */
 326 int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
 327 {
 328         struct sockaddr_un addr;
 329         int s;
 330         int i;
 331         int actual_queue_len;
 332 #ifdef HAVE_STRUCT_UCRED
 333         int passcred = 1;
 334 #endif
 335
 336         actual_queue_len = queue_len;
 337         if (actual_queue_len < 5) actual_queue_len = 5;
 338
 339         i = unlink(sockpath);
 340         if ((i != 0) && (errno != ENOENT)) {
 341                 *errormessage = (char*) malloc(SIZ + 1);
 342                 snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
 343                         sockpath, strerror(errno));
 344                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 345                 return(-1);
 346         }
 347
 348         memset(&addr, 0, sizeof(addr));
 349         addr.sun_family = AF_UNIX;
 350         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 351
 352         s = socket(AF_UNIX, SOCK_STREAM, 0);
 353         if (s < 0) {
 354                 *errormessage = (char*) malloc(SIZ + 1);
 355                 snprintf(*errormessage, SIZ,
 356                          "citserver: Can't create a socket: %s",
 357                          strerror(errno));
 358                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 359                 return(-1);
 360         }
 361
 362         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 363                 *errormessage = (char*) malloc(SIZ + 1);
 364                 snprintf(*errormessage, SIZ,
 365                          "citserver: Can't bind: %s",
 366                          strerror(errno));
 367                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 368                 return(-1);
 369         }
 370
 371         /* set to nonblock - we need this for some obscure situations */
 372         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 373                 *errormessage = (char*) malloc(SIZ + 1);
 374                 snprintf(*errormessage, SIZ,
 375                          "citserver: Can't set socket to non-blocking: %s",
 376                          strerror(errno));
 377                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 378                 close(s);
 379                 return(-1);
 380         }
 381
 382         if (listen(s, actual_queue_len) < 0) {
 383                 *errormessage = (char*) malloc(SIZ + 1);
 384                 snprintf(*errormessage, SIZ,
 385                          "citserver: Can't listen: %s",
 386                          strerror(errno));
 387                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 388                 return(-1);
 389         }
 390
 391 #ifdef HAVE_STRUCT_UCRED
 392         setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
 393 #endif
 394
 395         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 396         return(s);
 397 }
 398
 399
 400
 401 /*
 402  * The following functions implement output buffering on operating systems which
 403  * support it (such as Linux and various BSD flavors).
 404  */
 405 #ifndef HAVE_DARWIN
 406 #ifdef TCP_CORK
 407 #       define HAVE_TCP_BUFFERING
 408 #else
 409 #       ifdef TCP_NOPUSH
 410 #               define HAVE_TCP_BUFFERING
 411 #               define TCP_CORK TCP_NOPUSH
 412 #       endif
 413 #endif /* TCP_CORK */
 414 #endif /* HAVE_DARWIN */
 415
 416 static unsigned on = 1, off = 0;
 417
 418 void buffer_output(void) {
 419 #ifdef HAVE_TCP_BUFFERING
 420 #ifdef HAVE_OPENSSL
 421         if (!CC->redirect_ssl)
 422 #endif
 423                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 424 #endif
 425 }
 426
 427 void unbuffer_output(void) {
 428 #ifdef HAVE_TCP_BUFFERING
 429 #ifdef HAVE_OPENSSL
 430         if (!CC->redirect_ssl)
 431 #endif
 432                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 433 #endif
 434 }
 435
 436 void flush_output(void) {
 437 #ifdef HAVE_TCP_BUFFERING
 438         struct CitContext *CCC = CC;
 439         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 440         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 441 #endif
 442 }
 443
 444 /*
 445 static void flush_client_inbuf(void)
 446 {
 447         CitContext *CCC=CC;
 448
 449         FlushStrBuf(CCC->ReadBuf);
 450         CCC->Pos = NULL;
 451
 452 }
 453 */
 454
 455 /*
 456  * client_write()   ...    Send binary data to the client.
 457  */
 458 int client_write(const char *buf, int nbytes)
 459 {
 460         int bytes_written = 0;
 461         int retval;
 462 #ifndef HAVE_TCP_BUFFERING
 463         int old_buffer_len = 0;
 464 #endif
 465         fd_set wset;
 466         CitContext *Ctx;
 467         int fdflags;
 468
 469         if (nbytes < 1) return(0);
 470
 471 //      flush_client_inbuf();
 472         Ctx = CC;
 473         if (Ctx->redirect_buffer != NULL) {
 474                 StrBufAppendBufPlain(Ctx->redirect_buffer,
 475                                      buf, nbytes, 0);
 476                 return 0;
 477         }
 478
 479 #ifdef HAVE_OPENSSL
 480         if (Ctx->redirect_ssl) {
 481                 client_write_ssl(buf, nbytes);
 482                 return 0;
 483         }
 484 #endif
 485         if (Ctx->client_socket == -1) return -1;
 486
 487         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 488
 489         while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
 490                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 491                         FD_ZERO(&wset);
 492                         FD_SET(Ctx->client_socket, &wset);
 493                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 494                                 if (errno == EINTR)
 495                                 {
 496                                         CtdlLogPrintf(CTDL_DEBUG, "client_write(%d bytes) select() interrupted.\n", nbytes-bytes_written);
 497                                         if (CtdlThreadCheckStop()) {
 498                                                 CC->kill_me = 1;
 499                                                 return (-1);
 500                                         } else {
 501                                                 /* can't trust fd's and stuff so we need to re-create them */
 502                                                 continue;
 503                                         }
 504                                 } else {
 505                                         CtdlLogPrintf(CTDL_ERR,
 506                                                 "client_write(%d bytes) select failed: %s (%d)\n",
 507                                                 nbytes - bytes_written,
 508                                                 strerror(errno), errno);
 509                                         cit_backtrace();
 510                                         Ctx->kill_me = 1;
 511                                         return -1;
 512                                 }
 513                         }
 514                 }
 515
 516                 retval = write(Ctx->client_socket, &buf[bytes_written],
 517                         nbytes - bytes_written);
 518                 if (retval < 1) {
 519                         CtdlLogPrintf(CTDL_ERR,
 520                                 "client_write(%d bytes) failed: %s (%d)\n",
 521                                 nbytes - bytes_written,
 522                                 strerror(errno), errno);
 523                         cit_backtrace();
 524                         // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s",  &buf[bytes_written]);
 525                         Ctx->kill_me = 1;
 526                         return -1;
 527                 }
 528                 bytes_written = bytes_written + retval;
 529         }
 530         return 0;
 531 }
 532
 533 void cputbuf(const StrBuf *Buf) {
 534         client_write(ChrPtr(Buf), StrLength(Buf));
 535 }
 536
 537
 538 /*
 539  * cprintf()    Send formatted printable data to the client.
 540  *              Implemented in terms of client_write() so it's technically not sysdep...
 541  */
 542 void cprintf(const char *format, ...) {
 543         va_list arg_ptr;
 544         char buf[1024];
 545
 546         va_start(arg_ptr, format);
 547         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 548                 buf[sizeof buf - 2] = '\n';
 549         client_write(buf, strlen(buf));
 550         va_end(arg_ptr);
 551 }
 552
 553
 554 /*
 555  * Read data from the client socket.
 556  *
 557  * sock         socket fd to read from
 558  * buf          buffer to read into
 559  * bytes        number of bytes to read
 560  * timeout      Number of seconds to wait before timing out
 561  *
 562  * Possible return values:
 563  *      1       Requested number of bytes has been read.
 564  *      0       Request timed out.
 565  *      -1      Connection is broken, or other error.
 566  */
 567 int client_read_blob(StrBuf *Target, int bytes, int timeout)
 568 {
 569         CitContext *CCC=CC;
 570         const char *Error;
 571         int retval = 0;
 572
 573 #ifdef HAVE_OPENSSL
 574         if (CCC->redirect_ssl) {
 575                 retval = client_read_sslblob(Target, bytes, timeout);
 576                 if (retval < 0) {
 577                         CtdlLogPrintf(CTDL_CRIT,
 578                                       "%s failed\n",
 579                                       __FUNCTION__);
 580                 }
 581         }
 582         else
 583 #endif
 584         {
 585                 retval = StrBufReadBLOBBuffered(Target,
 586                                                 CCC->ReadBuf,
 587                                                 &CCC->Pos,
 588                                                 &CCC->client_socket,
 589                                                 1,
 590                                                 bytes,
 591                                                 O_TERM,
 592                                                 &Error);
 593                 if (retval < 0) {
 594                         CtdlLogPrintf(CTDL_CRIT,
 595                                       "%s failed: %s\n",
 596                                       __FUNCTION__,
 597                                       Error);
 598                         return retval;
 599                 }
 600                 else
 601                 {
 602 #ifdef BIGBAD_IODBG
 603                         int rv = 0;
 604                         char fn [SIZ];
 605                         FILE *fd;
 606
 607                         snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 608
 609                         fd = fopen(fn, "a+");
 610                         fprintf(fd, "Read: BufSize: %d BufContent: [",
 611                                 StrLength(Target));
 612                         rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 613                         fprintf(fd, "]\n");
 614
 615
 616                         fclose(fd);
 617 #endif
 618
 619                 }
 620         }
 621         return retval;
 622 }
 623
 624 int client_read_to(char *buf, int bytes, int timeout)
 625 {
 626         CitContext *CCC=CC;
 627         int rc;
 628
 629         rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
 630         if (rc < 0)
 631         {
 632                 *buf = '\0';
 633                 return rc;
 634         }
 635         else
 636         {
 637                 memcpy(buf,
 638                        ChrPtr(CCC->MigrateBuf),
 639                        StrLength(CCC->MigrateBuf) + 1);
 640                 FlushStrBuf(CCC->MigrateBuf);
 641                 return rc;
 642         }
 643 }
 644
 645
 646 int HaveMoreLinesWaiting(CitContext *CCC)
 647 {
 648         if ((CCC->kill_me == 1) || (
 649             (CCC->Pos == NULL) &&
 650             (StrLength(CCC->ReadBuf) == 0) &&
 651             (CCC->client_socket != -1)) )
 652                 return 0;
 653         else
 654                 return 1;
 655 }
 656
 657
 658 /*
 659  * Read data from the client socket with default timeout.
 660  * (This is implemented in terms of client_read_to() and could be
 661  * justifiably moved out of sysdep.c)
 662  */
 663 INLINE int client_read(char *buf, int bytes)
 664 {
 665         return(client_read_to(buf, bytes, config.c_sleeping));
 666 }
 667
 668 int CtdlClientGetLine(StrBuf *Target)
 669 {
 670         CitContext *CCC=CC;
 671         const char *Error;
 672         int rc;
 673
 674         FlushStrBuf(Target);
 675 #ifdef HAVE_OPENSSL
 676         if (CCC->redirect_ssl) {
 677 #ifdef BIGBAD_IODBG
 678                 char fn [SIZ];
 679                 FILE *fd;
 680                 int len = 0;
 681                 int rlen = 0;
 682                 int  nlen = 0;
 683                 int nrlen = 0;
 684                 const char *pch;
 685
 686                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 687
 688                 fd = fopen(fn, "a+");
 689                 pch = ChrPtr(CCC->ReadBuf);
 690                 len = StrLength(CCC->ReadBuf);
 691                 if (CCC->Pos != NULL)
 692                         rlen = CC->Pos - pch;
 693                 else
 694                         rlen = 0;
 695
 696 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 697                         len, rlen, pch);
 698 */
 699                 fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
 700                         len, rlen);
 701 #endif
 702                 rc = client_readline_sslbuffer(Target,
 703                                                CCC->ReadBuf,
 704                                                &CCC->Pos,
 705                                                1);
 706 #ifdef BIGBAD_IODBG
 707                 pch = ChrPtr(CCC->ReadBuf);
 708                 nlen = StrLength(CCC->ReadBuf);
 709                 if (CCC->Pos != NULL)
 710                         nrlen = CC->Pos - pch;
 711                 else
 712                         nrlen = 0;
 713 /*
 714                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 715                         len, nlen, rlen, nrlen, pch);
 716 */
 717                 fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 718                         len, nlen, rlen, nrlen);
 719
 720                 fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 721                         StrLength(Target), ChrPtr(Target));
 722                 fclose(fd);
 723
 724                 if (rc < 0)
 725                         CtdlLogPrintf(CTDL_CRIT,
 726                                       "%s failed\n",
 727                                       __FUNCTION__);
 728 #endif
 729                 return rc;
 730         }
 731         else
 732 #endif
 733         {
 734 #ifdef BIGBAD_IODBG
 735                 char fn [SIZ];
 736                 FILE *fd;
 737                 int len, rlen, nlen, nrlen;
 738                 const char *pch;
 739
 740                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 741
 742                 fd = fopen(fn, "a+");
 743                 pch = ChrPtr(CCC->ReadBuf);
 744                 len = StrLength(CCC->ReadBuf);
 745                 if (CCC->Pos != NULL)
 746                         rlen = CC->Pos - pch;
 747                 else
 748                         rlen = 0;
 749
 750 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 751                         len, rlen, pch);
 752 */
 753                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 754                         len, rlen);
 755 #endif
 756                 rc = StrBufTCP_read_buffered_line_fast(Target,
 757                                                        CCC->ReadBuf,
 758                                                        &CCC->Pos,
 759                                                        &CCC->client_socket,
 760                                                        5,
 761                                                        1,
 762                                                        &Error);
 763
 764 #ifdef BIGBAD_IODBG
 765                 pch = ChrPtr(CCC->ReadBuf);
 766                 nlen = StrLength(CCC->ReadBuf);
 767                 if (CCC->Pos != NULL)
 768                         nrlen = CC->Pos - pch;
 769                 else
 770                         nrlen = 0;
 771 /*
 772                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 773                         len, nlen, rlen, nrlen, pch);
 774 */
 775                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 776                         len, nlen, rlen, nrlen);
 777
 778                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 779                         StrLength(Target), ChrPtr(Target));
 780                 fclose(fd);
 781
 782                 if ((rc < 0) && (Error != NULL))
 783                         CtdlLogPrintf(CTDL_CRIT,
 784                                       "%s failed: %s\n",
 785                                       __FUNCTION__,
 786                                       Error);
 787 #endif
 788                 return rc;
 789         }
 790 }
 791
 792
 793 /*
 794  * client_getln()   ...   Get a LF-terminated line of text from the client.
 795  * (This is implemented in terms of client_read() and could be
 796  * justifiably moved out of sysdep.c)
 797  */
 798 int client_getln(char *buf, int bufsize)
 799 {
 800         int i, retval;
 801         CitContext *CCC=CC;
 802         const char *pCh;
 803
 804         retval = CtdlClientGetLine(CCC->MigrateBuf);
 805         if (retval < 0)
 806           return(retval >= 0);
 807
 808
 809         i = StrLength(CCC->MigrateBuf);
 810         pCh = ChrPtr(CCC->MigrateBuf);
 811         /* Strip the trailing LF, and the trailing CR if present.
 812          */
 813         if (bufsize <= i)
 814                 i = bufsize - 1;
 815         while ( (i > 0)
 816                 && ( (pCh[i - 1]==13)
 817                      || ( pCh[i - 1]==10)) ) {
 818                 i--;
 819         }
 820         memcpy(buf, pCh, i);
 821         buf[i] = 0;
 822
 823         FlushStrBuf(CCC->MigrateBuf);
 824         if (retval < 0) {
 825                 safestrncpy(&buf[i], "000", bufsize - i);
 826         }
 827         return(retval >= 0);
 828 }
 829
 830
 831 /*
 832  * Cleanup any contexts that are left lying around
 833  */
 834
 835
 836 void close_masters (void)
 837 {
 838         struct ServiceFunctionHook *serviceptr;
 839
 840         /*
 841          * close all protocol master sockets
 842          */
 843         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 844             serviceptr = serviceptr->next ) {
 845
 846                 if (serviceptr->tcp_port > 0)
 847                 {
 848                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 849                                 serviceptr->tcp_port);
 850                         serviceptr->tcp_port = 0;
 851                 }
 852
 853                 if (serviceptr->sockpath != NULL)
 854                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 855                                 serviceptr->sockpath);
 856
 857                 close(serviceptr->msock);
 858                 /* If it's a Unix domain socket, remove the file. */
 859                 if (serviceptr->sockpath != NULL) {
 860                         unlink(serviceptr->sockpath);
 861                         serviceptr->sockpath = NULL;
 862                 }
 863         }
 864 }
 865
 866
 867 /*
 868  * The system-dependent part of master_cleanup() - close the master socket.
 869  */
 870 void sysdep_master_cleanup(void) {
 871
 872         close_masters();
 873
 874         context_cleanup();
 875
 876 #ifdef HAVE_OPENSSL
 877         destruct_ssl();
 878 #endif
 879         CtdlDestroyProtoHooks();
 880         CtdlDestroyDeleteHooks();
 881         CtdlDestroyXmsgHooks();
 882         CtdlDestroyNetprocHooks();
 883         CtdlDestroyUserHooks();
 884         CtdlDestroyMessageHook();
 885         CtdlDestroyCleanupHooks();
 886         CtdlDestroyFixedOutputHooks();
 887         CtdlDestroySessionHooks();
 888         CtdlDestroyServiceHook();
 889         CtdlDestroyRoomHooks();
 890         #ifdef HAVE_BACKTRACE
 891 ///     eCrash_Uninit();
 892         #endif
 893 }
 894
 895
 896
 897 pid_t current_child;
 898 void graceful_shutdown(int signum) {
 899         kill(current_child, signum);
 900         unlink(file_pid_file);
 901         exit(0);
 902 }
 903
 904 int nFireUps = 0;
 905 int nFireUpsNonRestart = 0;
 906 pid_t ForkedPid = 1;
 907
 908 /*
 909  * Start running as a daemon.
 910  */
 911 void start_daemon(int unused) {
 912         int status = 0;
 913         pid_t child = 0;
 914         FILE *fp;
 915         int do_restart = 0;
 916
 917         current_child = 0;
 918
 919         /* Close stdin/stdout/stderr and replace them with /dev/null.
 920          * We don't just call close() because we don't want these fd's
 921          * to be reused for other files.
 922          */
 923         if (chdir(ctdl_run_dir) != 0)
 924                 CtdlLogPrintf(CTDL_EMERG,
 925                               "unable to change into directory [%s]: %s",
 926                               ctdl_run_dir, strerror(errno));
 927
 928         child = fork();
 929         if (child != 0) {
 930                 exit(0);
 931         }
 932
 933         signal(SIGHUP, SIG_IGN);
 934         signal(SIGINT, SIG_IGN);
 935         signal(SIGQUIT, SIG_IGN);
 936
 937         setsid();
 938         umask(0);
 939         if ((freopen("/dev/null", "r", stdin) != stdin) ||
 940             (freopen("/dev/null", "w", stdout) != stdout) ||
 941             (freopen("/dev/null", "w", stderr) != stderr))
 942                 CtdlLogPrintf(CTDL_EMERG,
 943                               "unable to reopen stdin/out/err %s",
 944                               strerror(errno));
 945
 946
 947         do {
 948                 current_child = fork();
 949
 950                 signal(SIGTERM, graceful_shutdown);
 951
 952                 if (current_child < 0) {
 953                         perror("fork");
 954                         exit(errno);
 955                 }
 956
 957                 else if (current_child == 0) {
 958                         return; /* continue starting citadel. */
 959                 }
 960
 961                 else {
 962                         fp = fopen(file_pid_file, "w");
 963                         if (fp != NULL) {
 964                                 fprintf(fp, ""F_PID_T"\n", getpid());
 965                                 fclose(fp);
 966                         }
 967                         waitpid(current_child, &status, 0);
 968                 }
 969                 do_restart = 0;
 970                 nFireUpsNonRestart = nFireUps;
 971
 972                 /* Exit code 0 means the watcher should exit */
 973                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
 974                         do_restart = 0;
 975                 }
 976
 977                 /* Exit code 101-109 means the watcher should exit */
 978                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
 979                         do_restart = 0;
 980                 }
 981
 982                 /* Any other exit code, or no exit code, means we should restart. */
 983                 else {
 984                         do_restart = 1;
 985                         nFireUps++;
 986                         ForkedPid = current_child;
 987                 }
 988
 989         } while (do_restart);
 990
 991         unlink(file_pid_file);
 992         exit(WEXITSTATUS(status));
 993 }
 994
 995
 996
 997 void checkcrash(void)
 998 {
 999         if (nFireUpsNonRestart != nFireUps)
1000         {
1001                 StrBuf *CrashMail;
1002
1003                 CrashMail = NewStrBuf();
1004                 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
1005                 StrBufPrintf(CrashMail,
1006                         " \n"
1007                         " The Citadel server process (citserver) terminated unexpectedly."
1008                         "\n \n"
1009                         " This could be the result of a bug in the server program, or some external "
1010                         "factor.\n \n"
1011                         " You can obtain more information about this by enabling core dumps.\n \n"
1012                         " For more information, please see:\n \n"
1013                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1014                         "\n \n"
1015
1016                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1017                         ,
1018                         ctdl_run_dir, ForkedPid);
1019                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1020                 FreeStrBuf(&CrashMail);
1021         }
1022 }
1023
1024
1025 /*
1026  * Generic routine to convert a login name to a full name (gecos)
1027  * Returns nonzero if a conversion took place
1028  */
1029 int convert_login(char NameToConvert[]) {
1030         struct passwd *pw;
1031         int a;
1032
1033         pw = getpwnam(NameToConvert);
1034         if (pw == NULL) {
1035                 return(0);
1036         }
1037         else {
1038                 strcpy(NameToConvert, pw->pw_gecos);
1039                 for (a=0; a<strlen(NameToConvert); ++a) {
1040                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1041                 }
1042                 return(1);
1043         }
1044 }
1045
1046
1047
1048 /*
1049  * This loop just keeps going and going and going...
1050  */
1051 /*
1052  * FIXME:
1053  * This current implimentation of worker_thread creates a bottle neck in several situations
1054  * The first thing to remember is that a single thread can handle more than one connection at a time.
1055  * More threads mean less memory for the system to run in.
1056  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1057  * something to happen anywhere.
1058  * This current implimentation requires worker threads to wait in other locations, after it has
1059  * been committed to a single connection which is very wasteful.
1060  * As an extreme case consider this:
1061  * A slow client connects and this slow client sends only one character each second.
1062  * With this current implimentation a single worker thread is dispatched to handle that connection
1063  * until such times as the client timeout expires, an error occurs on the socket or the client
1064  * completes its transmission.
1065  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1066  * second interval between chars.
1067  *
1068  * It is my intention to re-write this code and the associated client_getln, client_read functions
1069  * to allow any thread to read data on behalf of any connection (context).
1070  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1071  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1072  * process it.
1073  * This worker thread loop also needs to be able to handle binary data.
1074  */
1075
1076 void *worker_thread(void *arg) {
1077         int highest;
1078         CitContext *ptr;
1079         CitContext *bind_me = NULL;
1080         fd_set readfds;
1081         int retval = 0;
1082         struct timeval tv;
1083         int force_purge = 0;
1084
1085
1086         while (!CtdlThreadCheckStop()) {
1087
1088                 /* make doubly sure we're not holding any stale db handles
1089                  * which might cause a deadlock.
1090                  */
1091                 cdb_check_handles();
1092 do_select:      force_purge = 0;
1093                 bind_me = NULL;         /* Which session shall we handle? */
1094
1095                 /* Initialize the fdset. */
1096                 FD_ZERO(&readfds);
1097                 highest = 0;
1098
1099                 begin_critical_section(S_SESSION_TABLE);
1100                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1101                         int client_socket;
1102                         client_socket = ptr->client_socket;
1103                         /* Dont select on dead sessions only truly idle ones */
1104                         if ((ptr->state == CON_IDLE) &&
1105                             (CC->kill_me == 0) &&
1106                             (client_socket != -1))
1107                         {
1108                                 FD_SET(client_socket, &readfds);
1109                                 if (client_socket > highest)
1110                                         highest = client_socket;
1111                         }
1112                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1113                                 bind_me = ptr;
1114                                 ptr->state = CON_EXECUTING;
1115                                 break;
1116                         }
1117                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1118                                 bind_me = ptr;
1119                                 ptr->state = CON_STARTING;
1120                                 break;
1121                         }
1122                 }
1123                 end_critical_section(S_SESSION_TABLE);
1124
1125                 if (bind_me) {
1126                         goto SKIP_SELECT;
1127                 }
1128
1129                 /* If we got this far, it means that there are no sessions
1130                  * which a previous thread marked for attention, so we go
1131                  * ahead and get ready to select().
1132                  */
1133
1134                 if (!CtdlThreadCheckStop()) {
1135                         tv.tv_sec = 1;          /* wake up every second if no input */
1136                         tv.tv_usec = 0;
1137                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1138                 }
1139                 else
1140                         return NULL;
1141
1142                 /* Now figure out who made this select() unblock.
1143                  * First, check for an error or exit condition.
1144                  */
1145                 if (retval < 0) {
1146                         if (errno == EBADF) {
1147                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1148                                         strerror(errno));
1149                                 goto do_select;
1150                         }
1151                         if (errno != EINTR) {
1152                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1153                                 CtdlThreadStopAll();
1154                                 continue;
1155                         } else {
1156                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1157                                 if (CtdlThreadCheckStop()) return(NULL);
1158                                 goto do_select;
1159                         }
1160                 }
1161                 else if(retval == 0) {
1162                         if (CtdlThreadCheckStop()) return(NULL);
1163                 }
1164
1165                 /* It must be a client socket.  Find a context that has data
1166                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1167                  * active sockets other than our chosen one are marked as
1168                  * CON_READY so the next thread that comes around can just bind
1169                  * to one without having to select() again.
1170                  */
1171                 begin_critical_section(S_SESSION_TABLE);
1172                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1173                         int checkfd = ptr->client_socket;
1174                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1175                                 if (FD_ISSET(checkfd, &readfds)) {
1176                                         ptr->input_waiting = 1;
1177                                         if (!bind_me) {
1178                                                 bind_me = ptr;  /* I choose you! */
1179                                                 bind_me->state = CON_EXECUTING;
1180                                         }
1181                                         else {
1182                                                 ptr->state = CON_READY;
1183                                         }
1184                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1185                                         if (!bind_me) {
1186                                                 bind_me = ptr;  /* I choose you! */
1187                                                 bind_me->state = CON_EXECUTING;
1188                                         }
1189                                         else {
1190                                                 ptr->state = CON_READY;
1191                                         }
1192                                 }
1193                         }
1194                 }
1195                 end_critical_section(S_SESSION_TABLE);
1196
1197 SKIP_SELECT:
1198                 /* We're bound to a session */
1199                 if (bind_me != NULL) {
1200                         become_session(bind_me);
1201
1202                         if (bind_me->state == CON_STARTING) {
1203                                 bind_me->state = CON_EXECUTING;
1204                                 begin_session(bind_me);
1205                                 bind_me->h_greeting_function();
1206                         }
1207                         /* If the client has sent a command, execute it. */
1208                         if (CC->input_waiting) {
1209                                 CC->h_command_function();
1210
1211                                 while (HaveMoreLinesWaiting(CC))
1212                                        CC->h_command_function();
1213
1214                                 CC->input_waiting = 0;
1215                         }
1216
1217                         /* If there are asynchronous messages waiting and the
1218                          * client supports it, do those now */
1219                         if ((CC->is_async) && (CC->async_waiting)
1220                            && (CC->h_async_function != NULL)) {
1221                                 CC->h_async_function();
1222                                 CC->async_waiting = 0;
1223                         }
1224
1225                         force_purge = CC->kill_me;
1226                         become_session(NULL);
1227                         bind_me->state = CON_IDLE;
1228                 }
1229
1230                 dead_session_purge(force_purge);
1231                 do_housekeeping();
1232         }
1233         /* If control reaches this point, the server is shutting down */
1234         return(NULL);
1235 }
1236
1237
1238
1239
1240 /*
1241  * A function to handle selecting on master sockets.
1242  * In other words it handles new connections.
1243  * It is a thread.
1244  */
1245 void *select_on_master (void *arg)
1246 {
1247         struct ServiceFunctionHook *serviceptr;
1248         fd_set master_fds;
1249         int highest;
1250         struct timeval tv;
1251         int ssock;                      /* Descriptor for client socket */
1252         CitContext *con= NULL;  /* Temporary context pointer */
1253         int m;
1254         int i;
1255         int retval;
1256
1257         while (!CtdlThreadCheckStop()) {
1258                 /* Initialize the fdset. */
1259                 FD_ZERO(&master_fds);
1260                 highest = 0;
1261
1262                 /* First, add the various master sockets to the fdset. */
1263                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1264                 serviceptr = serviceptr->next ) {
1265                         m = serviceptr->msock;
1266                         FD_SET(m, &master_fds);
1267                         if (m > highest) {
1268                                 highest = m;
1269                         }
1270                 }
1271
1272                 if (!CtdlThreadCheckStop()) {
1273                         tv.tv_sec = 60;         /* wake up every second if no input */
1274                         tv.tv_usec = 0;
1275                         retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1276                 }
1277                 else
1278                         return NULL;
1279
1280                 /* Now figure out who made this select() unblock.
1281                  * First, check for an error or exit condition.
1282                  */
1283                 if (retval < 0) {
1284                         if (errno == EBADF) {
1285                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1286                                         strerror(errno));
1287                                 continue;
1288                         }
1289                         if (errno != EINTR) {
1290                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1291                                 CtdlThreadStopAll();
1292                         } else {
1293                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1294                                 if (CtdlThreadCheckStop()) return(NULL);
1295                                 continue;
1296                         }
1297                 }
1298                 else if(retval == 0) {
1299                         if (CtdlThreadCheckStop()) return(NULL);
1300                         continue;
1301                 }
1302                 /* Next, check to see if it's a new client connecting
1303                  * on a master socket.
1304                  */
1305                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1306                      serviceptr = serviceptr->next ) {
1307
1308                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1309                                 ssock = accept(serviceptr->msock, NULL, 0);
1310                                 if (ssock >= 0) {
1311                                         CtdlLogPrintf(CTDL_DEBUG,
1312                                                 "New client socket %d\n",
1313                                                 ssock);
1314
1315                                         /* The master socket is non-blocking but the client
1316                                          * sockets need to be blocking, otherwise certain
1317                                          * operations barf on FreeBSD.  Not a fatal error.
1318                                          */
1319                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1320                                                 CtdlLogPrintf(CTDL_EMERG,
1321                                                         "citserver: Can't set socket to blocking: %s\n",
1322                                                         strerror(errno));
1323                                         }
1324
1325                                         /* New context will be created already
1326                                          * set up in the CON_EXECUTING state.
1327                                          */
1328                                         con = CreateNewContext();
1329
1330                                         /* Assign our new socket number to it. */
1331                                         con->client_socket = ssock;
1332                                         con->h_command_function =
1333                                                 serviceptr->h_command_function;
1334                                         con->h_async_function =
1335                                                 serviceptr->h_async_function;
1336                                         con->h_greeting_function = serviceptr->h_greeting_function;
1337                                         con->ServiceName =
1338                                                 serviceptr->ServiceName;
1339
1340                                         /* Determine whether it's a local socket */
1341                                         if (serviceptr->sockpath != NULL)
1342                                                 con->is_local_socket = 1;
1343
1344                                         /* Set the SO_REUSEADDR socket option */
1345                                         i = 1;
1346                                         setsockopt(ssock, SOL_SOCKET,
1347                                                 SO_REUSEADDR,
1348                                                 &i, sizeof(i));
1349
1350                                         con->state = CON_GREETING;
1351
1352                                         retval--;
1353                                         if (retval == 0)
1354                                                 break;
1355                                 }
1356                         }
1357                 }
1358         }
1359         return NULL;
1360 }
1361
1362
1363
1364 /*
1365  * SyslogFacility()
1366  * Translate text facility name to syslog.h defined value.
1367  */
1368 int SyslogFacility(char *name)
1369 {
1370         int i;
1371         struct
1372         {
1373                 int facility;
1374                 char *name;
1375         }   facTbl[] =
1376         {
1377                 {   LOG_KERN,   "kern"          },
1378                 {   LOG_USER,   "user"          },
1379                 {   LOG_MAIL,   "mail"          },
1380                 {   LOG_DAEMON, "daemon"        },
1381                 {   LOG_AUTH,   "auth"          },
1382                 {   LOG_SYSLOG, "syslog"        },
1383                 {   LOG_LPR,    "lpr"           },
1384                 {   LOG_NEWS,   "news"          },
1385                 {   LOG_UUCP,   "uucp"          },
1386                 {   LOG_LOCAL0, "local0"        },
1387                 {   LOG_LOCAL1, "local1"        },
1388                 {   LOG_LOCAL2, "local2"        },
1389                 {   LOG_LOCAL3, "local3"        },
1390                 {   LOG_LOCAL4, "local4"        },
1391                 {   LOG_LOCAL5, "local5"        },
1392                 {   LOG_LOCAL6, "local6"        },
1393                 {   LOG_LOCAL7, "local7"        },
1394                 {   0,            NULL          }
1395         };
1396         for(i = 0; facTbl[i].name != NULL; i++) {
1397                 if(!strcasecmp(name, facTbl[i].name))
1398                         return facTbl[i].facility;
1399         }
1400         enable_syslog = 0;
1401         return LOG_DAEMON;
1402 }
1403
1404
1405 /********** MEM CHEQQER ***********/
1406
1407 #ifdef DEBUG_MEMORY_LEAKS
1408
1409 #undef malloc
1410 #undef realloc
1411 #undef strdup
1412 #undef free
1413
1414 void *tracked_malloc(size_t size, char *file, int line) {
1415         struct igheap *thisheap;
1416         void *block;
1417
1418         block = malloc(size);
1419         if (block == NULL) return(block);
1420
1421         thisheap = malloc(sizeof(struct igheap));
1422         if (thisheap == NULL) {
1423                 free(block);
1424                 return(NULL);
1425         }
1426
1427         thisheap->block = block;
1428         strcpy(thisheap->file, file);
1429         thisheap->line = line;
1430
1431         begin_critical_section(S_DEBUGMEMLEAKS);
1432         thisheap->next = igheap;
1433         igheap = thisheap;
1434         end_critical_section(S_DEBUGMEMLEAKS);
1435
1436         return(block);
1437 }
1438
1439
1440 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1441         struct igheap *thisheap;
1442         void *block;
1443
1444         block = realloc(ptr, size);
1445         if (block == NULL) return(block);
1446
1447         thisheap = malloc(sizeof(struct igheap));
1448         if (thisheap == NULL) {
1449                 free(block);
1450                 return(NULL);
1451         }
1452
1453         thisheap->block = block;
1454         strcpy(thisheap->file, file);
1455         thisheap->line = line;
1456
1457         begin_critical_section(S_DEBUGMEMLEAKS);
1458         thisheap->next = igheap;
1459         igheap = thisheap;
1460         end_critical_section(S_DEBUGMEMLEAKS);
1461
1462         return(block);
1463 }
1464
1465
1466
1467 void tracked_free(void *ptr) {
1468         struct igheap *thisheap;
1469         struct igheap *trash;
1470
1471         free(ptr);
1472
1473         if (igheap == NULL) return;
1474         begin_critical_section(S_DEBUGMEMLEAKS);
1475         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1476                 if (thisheap->next != NULL) {
1477                         if (thisheap->next->block == ptr) {
1478                                 trash = thisheap->next;
1479                                 thisheap->next = thisheap->next->next;
1480                                 free(trash);
1481                         }
1482                 }
1483         }
1484         if (igheap->block == ptr) {
1485                 trash = igheap;
1486                 igheap = igheap->next;
1487                 free(trash);
1488         }
1489         end_critical_section(S_DEBUGMEMLEAKS);
1490 }
1491
1492 char *tracked_strdup(const char *s, char *file, int line) {
1493         char *ptr;
1494
1495         if (s == NULL) return(NULL);
1496         ptr = tracked_malloc(strlen(s) + 1, file, line);
1497         if (ptr == NULL) return(NULL);
1498         strncpy(ptr, s, strlen(s));
1499         return(ptr);
1500 }
1501
1502 void dump_heap(void) {
1503         struct igheap *thisheap;
1504
1505         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1506                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1507                         thisheap->file, thisheap->line);
1508         }
1509 }
1510
1511 #endif /*  DEBUG_MEMORY_LEAKS */