src/main.cc

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG: section 1     Startup and Main Loop
   5  * AUTHOR: Harvest Derived
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  */
  34
  35 #include "squid.h"
  36 #include "AccessLogEntry.h"
  37 #if ICAP_CLIENT
  38 #include "adaptation/icap/icap_log.h"
  39 #endif
  40 #include "auth/Gadgets.h"
  41 #include "ConfigParser.h"
  42 #include "errorpage.h"
  43 #include "event.h"
  44 #include "EventLoop.h"
  45 #include "ExternalACL.h"
  46 #include "Store.h"
  47 #include "ICP.h"
  48 #include "ident/Ident.h"
  49 #include "HttpReply.h"
  50 #include "pconn.h"
  51 #include "Mem.h"
  52 #include "acl/Asn.h"
  53 #include "acl/Acl.h"
  54 #include "htcp.h"
  55 #include "StoreFileSystem.h"
  56 #include "DiskIO/DiskIOModule.h"
  57 #include "comm.h"
  58 #if USE_EPOLL
  59 #include "comm_epoll.h"
  60 #endif
  61 #if USE_KQUEUE
  62 #include "comm_kqueue.h"
  63 #endif
  64 #if USE_POLL
  65 #include "comm_poll.h"
  66 #endif
  67 #if defined(USE_SELECT) || defined(USE_SELECT_WIN32)
  68 #include "comm_select.h"
  69 #endif
  70 #include "SquidTime.h"
  71 #include "SwapDir.h"
  72 #include "forward.h"
  73 #include "MemPool.h"
  74 #include "icmp/IcmpSquid.h"
  75 #include "icmp/net_db.h"
  76 #include "TextException.h"
  77
  78 #if USE_LOADABLE_MODULES
  79 #include "LoadableModules.h"
  80 #endif
  81
  82 #if ICAP_CLIENT
  83 #include "adaptation/icap/Config.h"
  84 #endif
  85 #if USE_ECAP
  86 #include "adaptation/ecap/Config.h"
  87 #endif
  88 #if USE_ADAPTATION
  89 #include "adaptation/Config.h"
  90 #endif
  91
  92 #if USE_SQUID_ESI
  93 #include "esi/Module.h"
  94 #endif
  95
  96 #include "fs/Module.h"
  97
  98 #if USE_WIN32_SERVICE
  99
 100 #include "squid_windows.h"
 101 #include <process.h>
 102
 103 static int opt_install_service = FALSE;
 104 static int opt_remove_service = FALSE;
 105 static int opt_signal_service = FALSE;
 106 static int opt_command_line = FALSE;
 107 extern void WIN32_svcstatusupdate(DWORD, DWORD);
 108 void WINAPI WIN32_svcHandler(DWORD);
 109
 110 #endif
 111
 112 /** for error reporting from xmalloc and friends */
 113 SQUIDCEXTERN void (*failure_notify) (const char *);
 114
 115 static int opt_parse_cfg_only = 0;
 116 static char *opt_syslog_facility = NULL;
 117 static int icpPortNumOverride = 1;      /* Want to detect "-u 0" */
 118 static int configured_once = 0;
 119 #if MALLOC_DBG
 120 static int malloc_debug_level = 0;
 121 #endif
 122 static volatile int do_reconfigure = 0;
 123 static volatile int do_rotate = 0;
 124 static volatile int do_shutdown = 0;
 125 static volatile int shutdown_status = 0;
 126
 127 static void mainRotate(void);
 128 static void mainReconfigureStart(void);
 129 static void mainReconfigureFinish(void*);
 130 static void mainInitialize(void);
 131 static void usage(void);
 132 static void mainParseOptions(int argc, char *argv[]);
 133 static void sendSignal(void);
 134 static void serverConnectionsOpen(void);
 135 static void serverConnectionsClose(void);
 136 static void watch_child(char **);
 137 static void setEffectiveUser(void);
 138 #if MEM_GEN_TRACE
 139 extern void log_trace_done();
 140 extern void log_trace_init(char *);
 141 #endif
 142 static void SquidShutdown(void);
 143 static void mainSetCwd(void);
 144 static int checkRunningPid(void);
 145
 146 #ifndef _SQUID_MSWIN_
 147 static const char *squid_start_script = "squid_start";
 148 #endif
 149
 150 #if TEST_ACCESS
 151 #include "test_access.c"
 152 #endif
 153
 154 /** temporary thunk across to the unrefactored store interface */
 155
 156 class StoreRootEngine : public AsyncEngine
 157 {
 158
 159 public:
 160     int checkEvents(int timeout) {
 161         Store::Root().callback();
 162         return EVENT_IDLE;
 163     };
 164 };
 165
 166 class SignalEngine: public AsyncEngine
 167 {
 168
 169 public:
 170     SignalEngine(EventLoop &loop) : loop(loop) {}
 171     virtual int checkEvents(int timeout);
 172
 173 private:
 174     static void StopEventLoop(void * data) {
 175         static_cast<SignalEngine *>(data)->loop.stop();
 176     }
 177
 178     void doShutdown(time_t wait);
 179
 180     EventLoop &loop;
 181 };
 182
 183 int
 184 SignalEngine::checkEvents(int timeout)
 185 {
 186     PROF_start(SignalEngine_checkEvents);
 187
 188     if (do_reconfigure) {
 189         mainReconfigureStart();
 190         do_reconfigure = 0;
 191     } else if (do_rotate) {
 192         mainRotate();
 193         do_rotate = 0;
 194     } else if (do_shutdown) {
 195         doShutdown(do_shutdown > 0 ? (int) Config.shutdownLifetime : 0);
 196         do_shutdown = 0;
 197     }
 198
 199     PROF_stop(SignalEngine_checkEvents);
 200     return EVENT_IDLE;
 201 }
 202
 203 void
 204 SignalEngine::doShutdown(time_t wait)
 205 {
 206     debugs(1, 1, "Preparing for shutdown after " << statCounter.client_http.requests << " requests");
 207     debugs(1, 1, "Waiting " << wait << " seconds for active connections to finish");
 208
 209     shutting_down = 1;
 210
 211 #if USE_WIN32_SERVICE
 212     WIN32_svcstatusupdate(SERVICE_STOP_PENDING, (wait + 1) * 1000);
 213 #endif
 214
 215     serverConnectionsClose();
 216     eventAdd("SquidShutdown", &StopEventLoop, this, (double) (wait + 1), 1, false);
 217 }
 218
 219 static void
 220 usage(void)
 221 {
 222     fprintf(stderr,
 223 #if USE_WIN32_SERVICE
 224             "Usage: %s [-cdhirvzCFNRVYX] [-s | -l facility] [-f config-file] [-[au] port] [-k signal] [-n name] [-O CommandLine]\n"
 225 #else
 226             "Usage: %s [-cdhvzCFNRVYX] [-s | -l facility] [-f config-file] [-[au] port] [-k signal]\n"
 227 #endif
 228             "       -a port   Specify HTTP port number (default: %d).\n"
 229             "       -d level  Write debugging to stderr also.\n"
 230             "       -f file   Use given config-file instead of\n"
 231             "                 %s\n"
 232             "       -h        Print help message.\n"
 233 #if USE_WIN32_SERVICE
 234             "       -i        Installs as a Windows Service (see -n option).\n"
 235 #endif
 236             "       -k reconfigure|rotate|shutdown|interrupt|kill|debug|check|parse\n"
 237             "                 Parse configuration file, then send signal to \n"
 238             "                 running copy (except -k parse) and exit.\n"
 239 #if USE_WIN32_SERVICE
 240             "       -n name   Specify Windows Service name to use for service operations\n"
 241             "                 default is: " _WIN_SQUID_DEFAULT_SERVICE_NAME ".\n"
 242             "       -r        Removes a Windows Service (see -n option).\n"
 243 #endif
 244             "       -s | -l facility\n"
 245             "                 Enable logging to syslog.\n"
 246             "       -u port   Specify ICP port number (default: %d), disable with 0.\n"
 247             "       -v        Print version.\n"
 248             "       -z        Create swap directories\n"
 249             "       -C        Do not catch fatal signals.\n"
 250             "       -D        OBSOLETE. Scheduled for removal.\n"
 251             "       -F        Don't serve any requests until store is rebuilt.\n"
 252             "       -N        No daemon mode.\n"
 253 #if USE_WIN32_SERVICE
 254             "       -O options\n"
 255             "                 Set Windows Service Command line options in Registry.\n"
 256 #endif
 257             "       -R        Do not set REUSEADDR on port.\n"
 258             "       -S        Double-check swap during rebuild.\n"
 259             "       -X        Force full debugging.\n"
 260             "       -Y        Only return UDP_HIT or UDP_MISS_NOFETCH during fast reload.\n",
 261             APP_SHORTNAME, CACHE_HTTP_PORT, DefaultConfigFile, CACHE_ICP_PORT);
 262     exit(1);
 263 }
 264
 265 /**
 266  * Parse the parameters received via command line interface.
 267  *
 268  \param argc   Number of options received on command line
 269  \param argv   List of parameters received on command line
 270  */
 271 static void
 272 mainParseOptions(int argc, char *argv[])
 273 {
 274     extern char *optarg;
 275     int c;
 276
 277 #if USE_WIN32_SERVICE
 278     while ((c = getopt(argc, argv, "CDFNO:RSVYXa:d:f:hik:m::n:rsl:u:vz?")) != -1)
 279 #else
 280     while ((c = getopt(argc, argv, "CDFNRSYXa:d:f:hk:m::sl:u:vz?")) != -1)
 281 #endif
 282     {
 283
 284         switch (c) {
 285
 286         case 'C':
 287             /** \par C
 288              * Unset/disabel global option for catchign signals. opt_catch_signals */
 289             opt_catch_signals = 0;
 290             break;
 291
 292         case 'D':
 293             /** \par D
 294              * OBSOLETE: WAS: override to prevent optional startup DNS tests. */
 295             debugs(1,DBG_CRITICAL, "WARNING: -D command-line option is obsolete.");
 296             break;
 297
 298         case 'F':
 299             /** \par F
 300              * Set global option for foreground rebuild. opt_foreground_rebuild */
 301             opt_foreground_rebuild = 1;
 302             break;
 303
 304         case 'N':
 305             /** \par N
 306              * Set global option for 'no_daemon' mode. opt_no_daemon */
 307             opt_no_daemon = 1;
 308             break;
 309
 310 #if USE_WIN32_SERVICE
 311
 312         case 'O':
 313             /** \par O
 314              * Set global option. opt_command_lin and WIN32_Command_Line */
 315             opt_command_line = 1;
 316             WIN32_Command_Line = xstrdup(optarg);
 317             break;
 318 #endif
 319
 320         case 'R':
 321             /** \par R
 322              * Unset/disable global option opt_reuseaddr */
 323             opt_reuseaddr = 0;
 324             break;
 325
 326         case 'S':
 327             /** \par S
 328              * Set global option opt_store_doublecheck */
 329             opt_store_doublecheck = 1;
 330             break;
 331
 332         case 'X':
 333             /** \par X
 334              * Force full debugging */
 335             Debug::parseOptions("rotate=0 ALL,9");
 336             Debug::override_X = 1;
 337             sigusr2_handle(SIGUSR2);
 338             break;
 339
 340         case 'Y':
 341             /** \par Y
 342              * Set global option opt_reload_hit_only */
 343             opt_reload_hit_only = 1;
 344             break;
 345
 346 #if USE_WIN32_SERVICE
 347
 348         case 'i':
 349             /** \par i
 350              * Set global option opt_install_service (to TRUE) */
 351             opt_install_service = TRUE;
 352             break;
 353 #endif
 354
 355         case 'a':
 356             /** \par a
 357              * Add optional HTTP port as given following the option */
 358             add_http_port(optarg);
 359             break;
 360
 361         case 'd':
 362             /** \par d
 363              * Set global option Debug::log_stderr to the number given follwoign the option */
 364             Debug::log_stderr = atoi(optarg);
 365             break;
 366
 367         case 'f':
 368             /** \par f
 369              * Load the file given instead of the default squid.conf. */
 370             xfree(ConfigFile);
 371             ConfigFile = xstrdup(optarg);
 372             break;
 373
 374         case 'k':
 375             /** \par k
 376              * Run the administrative action given following the option */
 377
 378             /** \li When its an unknown option display the usage help. */
 379             if ((int) strlen(optarg) < 1)
 380                 usage();
 381
 382             if (!strncmp(optarg, "reconfigure", strlen(optarg)))
 383                 /** \li On reconfigure send SIGHUP. */
 384                 opt_send_signal = SIGHUP;
 385             else if (!strncmp(optarg, "rotate", strlen(optarg)))
 386                 /** \li On rotate send SIGQUIT or SIGUSR1. */
 387 #ifdef _SQUID_LINUX_THREADS_
 388
 389                 opt_send_signal = SIGQUIT;
 390
 391 #else
 392
 393                 opt_send_signal = SIGUSR1;
 394
 395 #endif
 396
 397             else if (!strncmp(optarg, "debug", strlen(optarg)))
 398                 /** \li On debug send SIGTRAP or SIGUSR2. */
 399 #ifdef _SQUID_LINUX_THREADS_
 400
 401                 opt_send_signal = SIGTRAP;
 402
 403 #else
 404
 405                 opt_send_signal = SIGUSR2;
 406
 407 #endif
 408
 409             else if (!strncmp(optarg, "shutdown", strlen(optarg)))
 410                 /** \li On shutdown send SIGTERM. */
 411                 opt_send_signal = SIGTERM;
 412             else if (!strncmp(optarg, "interrupt", strlen(optarg)))
 413                 /** \li On interrupt send SIGINT. */
 414                 opt_send_signal = SIGINT;
 415             else if (!strncmp(optarg, "kill", strlen(optarg)))
 416                 /** \li On kill send SIGKILL. */
 417                 opt_send_signal = SIGKILL;
 418
 419 #ifdef SIGTTIN
 420
 421             else if (!strncmp(optarg, "restart", strlen(optarg)))
 422                 /** \li On restart send SIGTTIN. (exit and restart by parent) */
 423                 opt_send_signal = SIGTTIN;
 424
 425 #endif
 426
 427             else if (!strncmp(optarg, "check", strlen(optarg)))
 428                 /** \li On check send 0 / SIGNULL. */
 429                 opt_send_signal = 0;    /* SIGNULL */
 430             else if (!strncmp(optarg, "parse", strlen(optarg)))
 431                 /** \li On parse set global flag to re-parse the config file only. */
 432                 opt_parse_cfg_only = 1;
 433             else
 434                 usage();
 435
 436             break;
 437
 438         case 'm':
 439             /** \par m
 440              * Set global malloc_debug_level to the value given following the option.
 441              * if none is given it toggles the xmalloc_trace option on/off */
 442             if (optarg) {
 443 #if MALLOC_DBG
 444                 malloc_debug_level = atoi(optarg);
 445 #else
 446                 fatal("Need to add -DMALLOC_DBG when compiling to use -mX option");
 447 #endif
 448
 449             } else {
 450 #if XMALLOC_TRACE
 451                 xmalloc_trace = !xmalloc_trace;
 452 #else
 453                 fatal("Need to configure --enable-xmalloc-debug-trace to use -m option");
 454 #endif
 455             }
 456             break;
 457
 458 #if USE_WIN32_SERVICE
 459
 460         case 'n':
 461             /** \par n
 462              * Set global option opt_signal_service (to TRUE).
 463              * Stores the additional parameter given in global WIN32_Service_name */
 464             xfree(WIN32_Service_name);
 465
 466             WIN32_Service_name = xstrdup(optarg);
 467
 468             opt_signal_service = TRUE;
 469
 470             break;
 471
 472         case 'r':
 473             /** \par r
 474              * Set global option opt_remove_service (to TRUE) */
 475             opt_remove_service = TRUE;
 476
 477             break;
 478
 479 #endif
 480
 481         case 'l':
 482             /** \par l
 483              * Stores the syslog facility name in global opt_syslog_facility
 484              * then performs actions for -s option. */
 485             opt_syslog_facility = xstrdup(optarg);
 486
 487         case 's':
 488             /** \par s
 489              * Initialize the syslog for output */
 490 #if HAVE_SYSLOG
 491
 492             _db_set_syslog(opt_syslog_facility);
 493
 494             break;
 495
 496 #else
 497
 498             fatal("Logging to syslog not available on this platform");
 499
 500             /* NOTREACHED */
 501 #endif
 502
 503         case 'u':
 504             /** \par u
 505              * Store the ICP port number given in global option icpPortNumOverride
 506              * ensuring its a positive number. */
 507             icpPortNumOverride = atoi(optarg);
 508
 509             if (icpPortNumOverride < 0)
 510                 icpPortNumOverride = 0;
 511
 512             break;
 513
 514         case 'v':
 515             /** \par v
 516              * Display squid version and build information. Then exit. */
 517             printf("Squid Cache: Version %s\nconfigure options: %s\n", version_string, SQUID_CONFIGURE_OPTIONS);
 518
 519 #if USE_WIN32_SERVICE
 520
 521             printf("Compiled as Windows System Service.\n");
 522
 523 #endif
 524
 525             exit(0);
 526
 527             /* NOTREACHED */
 528
 529         case 'z':
 530             /** \par z
 531              * Set global option Debug::log_stderr and opt_create_swap_dirs */
 532             Debug::log_stderr = 1;
 533             opt_create_swap_dirs = 1;
 534             break;
 535
 536         case 'h':
 537
 538         case '?':
 539
 540         default:
 541             /** \par h,?, or unknown
 542              * \copydoc usage() */
 543             usage();
 544
 545             break;
 546         }
 547
 548     }
 549 }
 550
 551 /* ARGSUSED */
 552 void
 553 rotate_logs(int sig)
 554 {
 555     do_rotate = 1;
 556 #ifndef _SQUID_MSWIN_
 557 #if !HAVE_SIGACTION
 558
 559     signal(sig, rotate_logs);
 560 #endif
 561 #endif
 562 }
 563
 564 /* ARGSUSED */
 565 void
 566 reconfigure(int sig)
 567 {
 568     do_reconfigure = 1;
 569 #ifndef _SQUID_MSWIN_
 570 #if !HAVE_SIGACTION
 571
 572     signal(sig, reconfigure);
 573 #endif
 574 #endif
 575 }
 576
 577 void
 578 shut_down(int sig)
 579 {
 580     do_shutdown = sig == SIGINT ? -1 : 1;
 581 #ifdef SIGTTIN
 582
 583     if (SIGTTIN == sig)
 584         shutdown_status = 1;
 585
 586 #endif
 587 #ifndef _SQUID_MSWIN_
 588 #ifdef KILL_PARENT_OPT
 589
 590     if (getppid() > 1) {
 591         debugs(1, 1, "Killing RunCache, pid " << getppid());
 592
 593         if (kill(getppid(), sig) < 0)
 594             debugs(1, 1, "kill " << getppid() << ": " << xstrerror());
 595     }
 596
 597 #endif
 598 #if SA_RESETHAND == 0
 599     signal(SIGTERM, SIG_DFL);
 600
 601     signal(SIGINT, SIG_DFL);
 602
 603 #endif
 604 #endif
 605 }
 606
 607 static void
 608 serverConnectionsOpen(void)
 609 {
 610     clientOpenListenSockets();
 611     icpConnectionsOpen();
 612 #if USE_HTCP
 613
 614     htcpInit();
 615 #endif
 616 #ifdef SQUID_SNMP
 617
 618     snmpConnectionOpen();
 619 #endif
 620 #if USE_WCCP
 621
 622     wccpConnectionOpen();
 623 #endif
 624
 625 #if USE_WCCPv2
 626
 627     wccp2ConnectionOpen();
 628 #endif
 629
 630     clientdbInit();
 631     icmpEngine.Open();
 632     netdbInit();
 633     asnInit();
 634     ACL::Initialize();
 635     peerSelectInit();
 636
 637     carpInit();
 638     peerUserHashInit();
 639     peerSourceHashInit();
 640 }
 641
 642 static void
 643 serverConnectionsClose(void)
 644 {
 645     assert(shutting_down || reconfiguring);
 646     clientHttpConnectionsClose();
 647     icpConnectionShutdown();
 648 #if USE_HTCP
 649
 650     htcpSocketShutdown();
 651 #endif
 652
 653     icmpEngine.Close();
 654 #ifdef SQUID_SNMP
 655
 656     snmpConnectionShutdown();
 657 #endif
 658 #if USE_WCCP
 659
 660     wccpConnectionClose();
 661 #endif
 662 #if USE_WCCPv2
 663
 664     wccp2ConnectionClose();
 665 #endif
 666
 667     asnFreeMemory();
 668 }
 669
 670 static void
 671 mainReconfigureStart(void)
 672 {
 673     debugs(1, 1, "Reconfiguring Squid Cache (version " << version_string << ")...");
 674     reconfiguring = 1;
 675
 676     // Initiate asynchronous closing sequence
 677     serverConnectionsClose();
 678     icpConnectionClose();
 679 #if USE_HTCP
 680
 681     htcpSocketClose();
 682 #endif
 683 #ifdef SQUID_SNMP
 684
 685     snmpConnectionClose();
 686 #endif
 687 #if USE_DNSSERVERS
 688
 689     dnsShutdown();
 690 #else
 691
 692     idnsShutdown();
 693 #endif
 694
 695     redirectShutdown();
 696     authenticateShutdown();
 697     externalAclShutdown();
 698     storeDirCloseSwapLogs();
 699     storeLogClose();
 700     accessLogClose();
 701 #if ICAP_CLIENT
 702     icapLogClose();
 703 #endif
 704     useragentLogClose();
 705     refererCloseLog();
 706
 707     eventAdd("mainReconfigureFinish", &mainReconfigureFinish, NULL, 0, 1,
 708              false);
 709 }
 710
 711 static void
 712 mainReconfigureFinish(void *)
 713 {
 714     debugs(1, 3, "finishing reconfiguring");
 715
 716     errorClean();
 717     enter_suid();               /* root to read config file */
 718
 719     // we may have disabled the need for PURGE
 720     if(Config2.onoff.enable_purge)
 721         Config2.onoff.enable_purge = 2;
 722
 723     parseConfigFile(ConfigFile);
 724
 725     setUmask(Config.umask);
 726     Mem::Report();
 727     setEffectiveUser();
 728     _db_init(Debug::cache_log, Debug::debugOptions);
 729     ipcache_restart();          /* clear stuck entries */
 730     authenticateUserCacheRestart();     /* clear stuck ACL entries */
 731     fqdncache_restart();        /* sigh, fqdncache too */
 732     parseEtcHosts();
 733     errorInitialize();          /* reload error pages */
 734     accessLogInit();
 735 #if ICAP_CLIENT
 736     icapLogOpen();
 737 #endif
 738     storeLogOpen();
 739     useragentOpenLog();
 740     refererOpenLog();
 741 #if USE_DNSSERVERS
 742
 743     dnsInit();
 744 #else
 745
 746     idnsInit();
 747 #endif
 748
 749     redirectInit();
 750     authenticateInit(&Config.authConfiguration);
 751     externalAclInit();
 752 #if USE_WCCP
 753
 754     wccpInit();
 755 #endif
 756 #if USE_WCCPv2
 757
 758     wccp2Init();
 759 #endif
 760
 761     serverConnectionsOpen();
 762
 763     neighbors_init();
 764
 765     storeDirOpenSwapLogs();
 766
 767     mimeInit(Config.mimeTablePathname);
 768
 769     if (Config.onoff.announce) {
 770         if (!eventFind(start_announce, NULL))
 771             eventAdd("start_announce", start_announce, NULL, 3600.0, 1);
 772     } else {
 773         if (eventFind(start_announce, NULL))
 774             eventDelete(start_announce, NULL);
 775     }
 776
 777     writePidFile();             /* write PID file */
 778
 779     debugs(1, 1, "Ready to serve requests.");
 780
 781     reconfiguring = 0;
 782 }
 783
 784 static void
 785 mainRotate(void)
 786 {
 787     icmpEngine.Close();
 788 #if USE_DNSSERVERS
 789     dnsShutdown();
 790 #endif
 791     redirectShutdown();
 792     authenticateShutdown();
 793     externalAclShutdown();
 794
 795     _db_rotate_log();           /* cache.log */
 796     storeDirWriteCleanLogs(1);
 797     storeLogRotate();           /* store.log */
 798     accessLogRotate();          /* access.log */
 799     useragentRotateLog();       /* useragent.log */
 800     refererRotateLog();         /* referer.log */
 801 #if ICAP_CLIENT
 802     icapLogRotate();               /*icap.log*/
 803 #endif
 804 #if WIP_FWD_LOG
 805     fwdLogRotate();
 806 #endif
 807
 808     icmpEngine.Open();
 809 #if USE_DNSSERVERS
 810     dnsInit();
 811 #endif
 812     redirectInit();
 813     authenticateInit(&Config.authConfiguration);
 814     externalAclInit();
 815 }
 816
 817 static void
 818 setEffectiveUser(void)
 819 {
 820     keepCapabilities();
 821     leave_suid();               /* Run as non privilegied user */
 822 #ifdef _SQUID_OS2_
 823
 824     return;
 825 #endif
 826
 827     if (geteuid() == 0) {
 828         debugs(0, 0, "Squid is not safe to run as root!  If you must");
 829         debugs(0, 0, "start Squid as root, then you must configure");
 830         debugs(0, 0, "it to run as a non-priveledged user with the");
 831         debugs(0, 0, "'cache_effective_user' option in the config file.");
 832         fatal("Don't run Squid as root, set 'cache_effective_user'!");
 833     }
 834 }
 835
 836 static void
 837 mainSetCwd(void)
 838 {
 839     char pathbuf[MAXPATHLEN];
 840
 841     if (Config.coredump_dir) {
 842         if (0 == strcmp("none", Config.coredump_dir)) {
 843             (void) 0;
 844         } else if (chdir(Config.coredump_dir) == 0) {
 845             debugs(0, 1, "Set Current Directory to " << Config.coredump_dir);
 846             return;
 847         } else {
 848             debugs(50, 0, "chdir: " << Config.coredump_dir << ": " << xstrerror());
 849         }
 850     }
 851
 852     /* If we don't have coredump_dir or couldn't cd there, report current dir */
 853     if (getcwd(pathbuf, MAXPATHLEN)) {
 854         debugs(0, 1, "Current Directory is " << pathbuf);
 855     } else {
 856         debugs(50, 0, "WARNING: Can't find current directory, getcwd: " << xstrerror());
 857     }
 858 }
 859
 860 #if DELAY_POOLS
 861 #include "DelayPools.h"
 862 #endif
 863
 864 static void
 865 mainInitialize(void)
 866 {
 867     /* chroot if configured to run inside chroot */
 868
 869     if (Config.chroot_dir && (chroot(Config.chroot_dir) != 0 || chdir("/") != 0)) {
 870         fatal("failed to chroot");
 871     }
 872
 873     if (opt_catch_signals) {
 874         squid_signal(SIGSEGV, death, SA_NODEFER | SA_RESETHAND);
 875         squid_signal(SIGBUS, death, SA_NODEFER | SA_RESETHAND);
 876     }
 877
 878     squid_signal(SIGPIPE, SIG_IGN, SA_RESTART);
 879     squid_signal(SIGCHLD, sig_child, SA_NODEFER | SA_RESTART);
 880
 881     setEffectiveUser();
 882
 883     if (icpPortNumOverride != 1)
 884         Config.Port.icp = (u_short) icpPortNumOverride;
 885
 886     _db_init(Debug::cache_log, Debug::debugOptions);
 887
 888     fd_open(fileno(debug_log), FD_LOG, Debug::cache_log);
 889
 890 #if MEM_GEN_TRACE
 891
 892     log_trace_init("/tmp/squid.alloc");
 893
 894 #endif
 895
 896     debugs(1, 0, "Starting Squid Cache version " << version_string << " for " << CONFIG_HOST_TYPE << "...");
 897
 898 #ifdef _SQUID_WIN32_
 899
 900     if (WIN32_run_mode == _WIN_SQUID_RUN_MODE_SERVICE) {
 901         debugs(1, 0, "Running as " << WIN32_Service_name << " Windows System Service on " << WIN32_OS_string);
 902         debugs(1, 0, "Service command line is: " << WIN32_Service_Command_Line);
 903     } else
 904         debugs(1, 0, "Running on " << WIN32_OS_string);
 905
 906 #endif
 907
 908     debugs(1, 1, "Process ID " << getpid());
 909
 910     debugs(1, 1, "With " << Squid_MaxFD << " file descriptors available");
 911
 912 #ifdef _SQUID_MSWIN_
 913
 914     debugs(1, 1, "With " << _getmaxstdio() << " CRT stdio descriptors available");
 915
 916     if (WIN32_Socks_initialized)
 917         debugs(1, 1, "Windows sockets initialized");
 918
 919     if (WIN32_OS_version > _WIN_OS_WINNT) {
 920         WIN32_IpAddrChangeMonitorInit();
 921     }
 922
 923 #endif
 924
 925     if (!configured_once)
 926         disk_init();            /* disk_init must go before ipcache_init() */
 927
 928     ipcache_init();
 929
 930     fqdncache_init();
 931
 932     parseEtcHosts();
 933
 934 #if USE_DNSSERVERS
 935
 936     dnsInit();
 937
 938 #else
 939
 940     idnsInit();
 941
 942 #endif
 943
 944     redirectInit();
 945
 946     authenticateInit(&Config.authConfiguration);
 947
 948     externalAclInit();
 949
 950     useragentOpenLog();
 951
 952     refererOpenLog();
 953
 954     httpHeaderInitModule();     /* must go before any header processing (e.g. the one in errorInitialize) */
 955
 956     httpReplyInitModule();      /* must go before accepting replies */
 957
 958     errorInitialize();
 959
 960     accessLogInit();
 961
 962 #if ICAP_CLIENT
 963     icapLogOpen();
 964 #endif
 965
 966 #if USE_IDENT
 967     Ident::Init();
 968 #endif
 969
 970 #ifdef SQUID_SNMP
 971
 972     snmpInit();
 973
 974 #endif
 975 #if MALLOC_DBG
 976
 977     malloc_debug(0, malloc_debug_level);
 978
 979 #endif
 980
 981     if (!configured_once) {
 982 #if USE_UNLINKD
 983         unlinkdInit();
 984 #endif
 985
 986         urlInitialize();
 987         statInit();
 988         storeInit();
 989         mainSetCwd();
 990         /* after this point we want to see the mallinfo() output */
 991         do_mallinfo = 1;
 992         mimeInit(Config.mimeTablePathname);
 993         refreshInit();
 994 #if DELAY_POOLS
 995
 996         DelayPools::Init();
 997 #endif
 998
 999         FwdState::initModule();
1000         /* register the modules in the cache manager menus */
1001
1002         cbdataRegisterWithCacheManager();
1003         /* These use separate calls so that the comm loops can eventually
1004          * coexist.
1005          */
1006
1007         eventInit();
1008
1009         // TODO: pconn is a good candidate for new-style registration
1010         // PconnModule::GetInstance()->registerWithCacheManager();
1011         //   moved to PconnModule::PconnModule()
1012     }
1013
1014 #if USE_WCCP
1015     wccpInit();
1016
1017 #endif
1018 #if USE_WCCPv2
1019
1020     wccp2Init();
1021
1022 #endif
1023
1024     serverConnectionsOpen();
1025
1026     neighbors_init();
1027
1028     // neighborsRegisterWithCacheManager(); //moved to neighbors_init()
1029
1030     if (Config.chroot_dir)
1031         no_suid();
1032
1033     if (!configured_once)
1034         writePidFile();         /* write PID file */
1035
1036 #ifdef _SQUID_LINUX_THREADS_
1037
1038     squid_signal(SIGQUIT, rotate_logs, SA_RESTART);
1039
1040     squid_signal(SIGTRAP, sigusr2_handle, SA_RESTART);
1041
1042 #else
1043
1044     squid_signal(SIGUSR1, rotate_logs, SA_RESTART);
1045
1046     squid_signal(SIGUSR2, sigusr2_handle, SA_RESTART);
1047
1048 #endif
1049
1050     squid_signal(SIGHUP, reconfigure, SA_RESTART);
1051
1052     squid_signal(SIGTERM, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART);
1053
1054     squid_signal(SIGINT, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART);
1055
1056 #ifdef SIGTTIN
1057
1058     squid_signal(SIGTTIN, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART);
1059
1060 #endif
1061
1062     memCheckInit();
1063
1064 #if USE_LOADABLE_MODULES
1065     LoadableModulesConfigure(Config.loadable_module_names);
1066 #endif
1067
1068 #if USE_ADAPTATION
1069     bool enableAdaptation = false;
1070
1071     // We can remove this dependency on specific adaptation mechanisms
1072     // if we create a generic Registry of such mechanisms. Should we?
1073 #if ICAP_CLIENT
1074     Adaptation::Icap::TheConfig.finalize();
1075     enableAdaptation = Adaptation::Icap::TheConfig.onoff || enableAdaptation;
1076 #endif
1077 #if USE_ECAP
1078     Adaptation::Ecap::TheConfig.finalize(); // must be after we load modules
1079     enableAdaptation = Adaptation::Ecap::TheConfig.onoff || enableAdaptation;
1080 #endif
1081     // must be the last adaptation-related finalize
1082     Adaptation::Config::Finalize(enableAdaptation);
1083 #endif
1084
1085 #if USE_SQUID_ESI
1086     Esi::Init();
1087 #endif
1088
1089     debugs(1, 1, "Ready to serve requests.");
1090
1091     if (!configured_once) {
1092         eventAdd("storeMaintain", Store::Maintain, NULL, 1.0, 1);
1093
1094         if (Config.onoff.announce)
1095             eventAdd("start_announce", start_announce, NULL, 3600.0, 1);
1096
1097         eventAdd("ipcache_purgelru", ipcache_purgelru, NULL, 10.0, 1);
1098
1099         eventAdd("fqdncache_purgelru", fqdncache_purgelru, NULL, 15.0, 1);
1100
1101 #if USE_XPROF_STATS
1102
1103         eventAdd("cpuProfiling", xprof_event, NULL, 1.0, 1);
1104
1105 #endif
1106
1107         eventAdd("memPoolCleanIdlePools", Mem::CleanIdlePools, NULL, 15.0, 1);
1108     }
1109
1110     configured_once = 1;
1111 }
1112
1113 /// unsafe main routine -- may throw
1114 int SquidMain(int argc, char **argv);
1115 /// unsafe main routine wrapper to catch exceptions
1116 static int SquidMainSafe(int argc, char **argv);
1117
1118 #if USE_WIN32_SERVICE
1119 /* When USE_WIN32_SERVICE is defined, the main function is placed in win32.cc */
1120 extern "C" void WINAPI
1121     SquidWinSvcMain(int argc, char **argv)
1122 #else
1123 int
1124 main(int argc, char **argv)
1125 #endif
1126 {
1127     SquidMainSafe(argc, argv);
1128 }
1129
1130 static int
1131 SquidMainSafe(int argc, char **argv)
1132 {
1133     try {
1134         return SquidMain(argc, argv);
1135     } catch (const std::exception &e) {
1136         std::cerr << "dying from an unhandled exception: " << e.what() << std::endl;
1137         throw;
1138     } catch (...) {
1139         std::cerr << "dying from an unhandled exception." << std::endl;
1140         throw;
1141     }
1142     return -1; // not reached
1143 }
1144
1145 int
1146 SquidMain(int argc, char **argv)
1147 {
1148 #ifdef _SQUID_WIN32_
1149
1150     int WIN32_init_err;
1151 #endif
1152
1153 #if HAVE_SBRK
1154
1155     sbrk_start = sbrk(0);
1156 #endif
1157
1158     Debug::parseOptions(NULL);
1159     debug_log = stderr;
1160
1161 #if defined(SQUID_MAXFD_LIMIT)
1162
1163     if (SQUID_MAXFD_LIMIT < Squid_MaxFD)
1164         Squid_MaxFD = SQUID_MAXFD_LIMIT;
1165
1166 #endif
1167
1168 #ifdef _SQUID_WIN32_
1169
1170     if ((WIN32_init_err = WIN32_Subsystem_Init(&argc, &argv)))
1171         return WIN32_init_err;
1172
1173 #endif
1174
1175     /* call mallopt() before anything else */
1176 #if HAVE_MALLOPT
1177 #ifdef M_GRAIN
1178     /* Round up all sizes to a multiple of this */
1179     mallopt(M_GRAIN, 16);
1180
1181 #endif
1182 #ifdef M_MXFAST
1183     /* biggest size that is considered a small block */
1184     mallopt(M_MXFAST, 256);
1185
1186 #endif
1187 #ifdef M_NBLKS
1188     /* allocate this many small blocks at once */
1189     mallopt(M_NLBLKS, 32);
1190
1191 #endif
1192 #endif /* HAVE_MALLOPT */
1193
1194     squid_srandom(time(NULL));
1195
1196     getCurrentTime();
1197
1198     squid_start = current_time;
1199
1200     failure_notify = fatal_dump;
1201
1202 #if USE_WIN32_SERVICE
1203
1204     WIN32_svcstatusupdate(SERVICE_START_PENDING, 10000);
1205
1206 #endif
1207
1208     mainParseOptions(argc, argv);
1209
1210     if (opt_parse_cfg_only) {
1211         Debug::parseOptions("ALL,1");
1212     }
1213
1214 #if USE_WIN32_SERVICE
1215
1216     if (opt_install_service) {
1217         WIN32_InstallService();
1218         return 0;
1219     }
1220
1221     if (opt_remove_service) {
1222         WIN32_RemoveService();
1223         return 0;
1224     }
1225
1226     if (opt_command_line) {
1227         WIN32_SetServiceCommandLine();
1228         return 0;
1229     }
1230
1231 #endif
1232
1233     /* parse configuration file
1234      * note: in "normal" case this used to be called from mainInitialize() */
1235     {
1236         int parse_err;
1237
1238         if (!ConfigFile)
1239             ConfigFile = xstrdup(DefaultConfigFile);
1240
1241         assert(!configured_once);
1242
1243         Mem::Init();
1244
1245         storeFsInit();          /* required for config parsing */
1246
1247         /* TODO: call the FS::Clean() in shutdown to do Fs cleanups */
1248         Fs::Init();
1249
1250         /* May not be needed for parsing, have not audited for such */
1251         DiskIOModule::SetupAllModules();
1252
1253         /* Shouldn't be needed for config parsing, but have not audited for such */
1254         StoreFileSystem::SetupAllFs();
1255
1256         /* we may want the parsing process to set this up in the future */
1257         Store::Root(new StoreController);
1258
1259         parse_err = parseConfigFile(ConfigFile);
1260
1261         Mem::Report();
1262
1263         if (opt_parse_cfg_only)
1264
1265             return parse_err;
1266     }
1267     setUmask(Config.umask);
1268     if (-1 == opt_send_signal)
1269         if (checkRunningPid())
1270             exit(0);
1271
1272 #if TEST_ACCESS
1273
1274     comm_init();
1275
1276     comm_select_init();
1277
1278     mainInitialize();
1279
1280     test_access();
1281
1282     return 0;
1283
1284 #endif
1285
1286     /* send signal to running copy and exit */
1287     if (opt_send_signal != -1) {
1288         /* chroot if configured to run inside chroot */
1289
1290         if (Config.chroot_dir) {
1291             if (chroot(Config.chroot_dir))
1292                 fatal("failed to chroot");
1293
1294             no_suid();
1295         } else {
1296             leave_suid();
1297         }
1298
1299         sendSignal();
1300         /* NOTREACHED */
1301     }
1302
1303     if (opt_create_swap_dirs) {
1304         /* chroot if configured to run inside chroot */
1305
1306         if (Config.chroot_dir && chroot(Config.chroot_dir)) {
1307             fatal("failed to chroot");
1308         }
1309
1310         setEffectiveUser();
1311         debugs(0, 0, "Creating Swap Directories");
1312         Store::Root().create();
1313
1314         return 0;
1315     }
1316
1317     if (!opt_no_daemon)
1318         watch_child(argv);
1319
1320     setMaxFD();
1321
1322     /* init comm module */
1323     comm_init();
1324
1325     comm_select_init();
1326
1327     if (opt_no_daemon) {
1328         /* we have to init fdstat here. */
1329         fd_open(0, FD_LOG, "stdin");
1330         fd_open(1, FD_LOG, "stdout");
1331         fd_open(2, FD_LOG, "stderr");
1332     }
1333
1334 #if USE_WIN32_SERVICE
1335
1336     WIN32_svcstatusupdate(SERVICE_START_PENDING, 10000);
1337
1338 #endif
1339
1340     mainInitialize();
1341
1342 #if USE_WIN32_SERVICE
1343
1344     WIN32_svcstatusupdate(SERVICE_RUNNING, 0);
1345
1346 #endif
1347
1348     /* main loop */
1349     EventLoop mainLoop;
1350
1351     SignalEngine signalEngine(mainLoop);
1352
1353     mainLoop.registerEngine(&signalEngine);
1354
1355     /* TODO: stop requiring the singleton here */
1356     mainLoop.registerEngine(EventScheduler::GetInstance());
1357
1358     StoreRootEngine store_engine;
1359
1360     mainLoop.registerEngine(&store_engine);
1361
1362     CommSelectEngine comm_engine;
1363
1364     mainLoop.registerEngine(&comm_engine);
1365
1366     mainLoop.setPrimaryEngine(&comm_engine);
1367
1368     /* use the standard time service */
1369     TimeEngine time_engine;
1370
1371     mainLoop.setTimeService(&time_engine);
1372
1373     mainLoop.run();
1374
1375     if (mainLoop.errcount == 10)
1376         fatal_dump("Event loop exited with failure.");
1377
1378     /* shutdown squid now */
1379     SquidShutdown();
1380
1381     /* NOTREACHED */
1382     return 0;
1383 }
1384
1385 static void
1386 sendSignal(void)
1387 {
1388     pid_t pid;
1389     debug_log = stderr;
1390
1391     if (strcmp(Config.pidFilename, "none") == 0) {
1392         debugs(0, 1, "No pid_filename specified. Trusting you know what you are doing.");
1393     }
1394
1395     pid = readPidFile();
1396
1397     if (pid > 1) {
1398 #if USE_WIN32_SERVICE
1399
1400         if (opt_signal_service) {
1401             WIN32_sendSignal(opt_send_signal);
1402             exit(0);
1403         } else
1404 #ifdef _SQUID_MSWIN_
1405         {
1406             fprintf(stderr, "%s: ERROR: Could not send ", APP_SHORTNAME);
1407             fprintf(stderr, "signal to Squid Service:\n");
1408             fprintf(stderr, "missing -n command line switch.\n");
1409             exit(1);
1410         }
1411
1412         /* NOTREACHED */
1413 #endif
1414
1415 #endif
1416
1417         if (kill(pid, opt_send_signal) &&
1418                 /* ignore permissions if just running check */
1419                 !(opt_send_signal == 0 && errno == EPERM)) {
1420             fprintf(stderr, "%s: ERROR: Could not send ", APP_SHORTNAME);
1421             fprintf(stderr, "signal %d to process %d: %s\n",
1422                     opt_send_signal, (int) pid, xstrerror());
1423             exit(1);
1424         }
1425     } else {
1426         if (opt_send_signal != SIGTERM) {
1427             fprintf(stderr, "%s: ERROR: No running copy\n", APP_SHORTNAME);
1428             exit(1);
1429         } else {
1430             fprintf(stderr, "%s: No running copy\n", APP_SHORTNAME);
1431             exit(0);
1432         }
1433     }
1434
1435     /* signal successfully sent */
1436     exit(0);
1437 }
1438
1439 #ifndef _SQUID_MSWIN_
1440 /*
1441  * This function is run when Squid is in daemon mode, just
1442  * before the parent forks and starts up the child process.
1443  * It can be used for admin-specific tasks, such as notifying
1444  * someone that Squid is (re)started.
1445  */
1446 static void
1447 mainStartScript(const char *prog)
1448 {
1449     char script[SQUID_MAXPATHLEN];
1450     char *t;
1451     size_t sl = 0;
1452     pid_t cpid;
1453     pid_t rpid;
1454     xstrncpy(script, prog, MAXPATHLEN);
1455
1456     if ((t = strrchr(script, '/'))) {
1457         *(++t) = '\0';
1458         sl = strlen(script);
1459     }
1460
1461     xstrncpy(&script[sl], squid_start_script, MAXPATHLEN - sl);
1462
1463     if ((cpid = fork()) == 0) {
1464         /* child */
1465         execl(script, squid_start_script, (char *)NULL);
1466         _exit(-1);
1467     } else {
1468         do {
1469 #ifdef _SQUID_NEXT_
1470             union wait status;
1471             rpid = wait3(&status, 0, NULL);
1472 #else
1473
1474             int status;
1475             rpid = waitpid(-1, &status, 0);
1476 #endif
1477
1478         } while (rpid != cpid);
1479     }
1480 }
1481
1482 #endif /* _SQUID_MSWIN_ */
1483
1484 static int
1485 checkRunningPid(void)
1486 {
1487     pid_t pid;
1488
1489     if (!debug_log)
1490         debug_log = stderr;
1491
1492     pid = readPidFile();
1493
1494     if (pid < 2)
1495         return 0;
1496
1497     if (kill(pid, 0) < 0)
1498         return 0;
1499
1500     debugs(0, 0, "Squid is already running!  Process ID " <<  pid);
1501
1502     return 1;
1503 }
1504
1505 static void
1506 watch_child(char *argv[])
1507 {
1508 #ifndef _SQUID_MSWIN_
1509     char *prog;
1510     int failcount = 0;
1511     time_t start;
1512     time_t stop;
1513 #ifdef _SQUID_NEXT_
1514
1515     union wait status;
1516 #else
1517
1518     int status;
1519 #endif
1520
1521     pid_t pid;
1522 #ifdef TIOCNOTTY
1523
1524     int i;
1525 #endif
1526
1527     int nullfd;
1528
1529     if (*(argv[0]) == '(')
1530         return;
1531
1532     openlog(APP_SHORTNAME, LOG_PID | LOG_NDELAY | LOG_CONS, LOG_LOCAL4);
1533
1534     if ((pid = fork()) < 0)
1535         syslog(LOG_ALERT, "fork failed: %s", xstrerror());
1536     else if (pid > 0)
1537         exit(0);
1538
1539     if (setsid() < 0)
1540         syslog(LOG_ALERT, "setsid failed: %s", xstrerror());
1541
1542     closelog();
1543
1544 #ifdef TIOCNOTTY
1545
1546     if ((i = open("/dev/tty", O_RDWR | O_TEXT)) >= 0) {
1547         ioctl(i, TIOCNOTTY, NULL);
1548         close(i);
1549     }
1550
1551 #endif
1552
1553     /*
1554      * RBCOLLINS - if cygwin stackdumps when squid is run without
1555      * -N, check the cygwin1.dll version, it needs to be AT LEAST
1556      * 1.1.3.  execvp had a bit overflow error in a loop..
1557      */
1558     /* Connect stdio to /dev/null in daemon mode */
1559     nullfd = open(_PATH_DEVNULL, O_RDWR | O_TEXT);
1560
1561     if (nullfd < 0)
1562         fatalf(_PATH_DEVNULL " %s\n", xstrerror());
1563
1564     dup2(nullfd, 0);
1565
1566     if (Debug::log_stderr < 0) {
1567         dup2(nullfd, 1);
1568         dup2(nullfd, 2);
1569     }
1570
1571     for (;;) {
1572         mainStartScript(argv[0]);
1573
1574         if ((pid = fork()) == 0) {
1575             /* child */
1576             openlog(APP_SHORTNAME, LOG_PID | LOG_NDELAY | LOG_CONS, LOG_LOCAL4);
1577             prog = xstrdup(argv[0]);
1578             argv[0] = xstrdup("(squid)");
1579             execvp(prog, argv);
1580             syslog(LOG_ALERT, "execvp failed: %s", xstrerror());
1581         }
1582
1583         /* parent */
1584         openlog(APP_SHORTNAME, LOG_PID | LOG_NDELAY | LOG_CONS, LOG_LOCAL4);
1585
1586         syslog(LOG_NOTICE, "Squid Parent: child process %d started", pid);
1587
1588         time(&start);
1589
1590         squid_signal(SIGINT, SIG_IGN, SA_RESTART);
1591
1592 #ifdef _SQUID_NEXT_
1593
1594         pid = wait3(&status, 0, NULL);
1595
1596 #else
1597
1598         pid = waitpid(-1, &status, 0);
1599
1600 #endif
1601
1602         time(&stop);
1603
1604         if (WIFEXITED(status)) {
1605             syslog(LOG_NOTICE,
1606                    "Squid Parent: child process %d exited with status %d",
1607                    pid, WEXITSTATUS(status));
1608         } else if (WIFSIGNALED(status)) {
1609             syslog(LOG_NOTICE,
1610                    "Squid Parent: child process %d exited due to signal %d with status %d",
1611                    pid, WTERMSIG(status), WEXITSTATUS(status));
1612         } else {
1613             syslog(LOG_NOTICE, "Squid Parent: child process %d exited", pid);
1614         }
1615
1616         if (stop - start < 10)
1617             failcount++;
1618         else
1619             failcount = 0;
1620
1621         if (failcount == 5) {
1622             syslog(LOG_ALERT, "Exiting due to repeated, frequent failures");
1623             exit(1);
1624         }
1625
1626         if (WIFEXITED(status))
1627             if (WEXITSTATUS(status) == 0)
1628                 exit(0);
1629
1630         if (WIFSIGNALED(status)) {
1631             switch (WTERMSIG(status)) {
1632
1633             case SIGKILL:
1634                 exit(0);
1635                 break;
1636
1637             case SIGINT:
1638             case SIGTERM:
1639                 syslog(LOG_ALERT, "Exiting due to unexpected forced shutdown");
1640                 exit(1);
1641                 break;
1642
1643             default:
1644                 break;
1645             }
1646         }
1647
1648         squid_signal(SIGINT, SIG_DFL, SA_RESTART);
1649         sleep(3);
1650     }
1651
1652     /* NOTREACHED */
1653 #endif /* _SQUID_MSWIN_ */
1654
1655 }
1656
1657 static void
1658 SquidShutdown()
1659 {
1660     /* XXX: This function is called after the main loop has quit, which
1661      * means that no AsyncCalls would be called, including close handlers.
1662      * TODO: We need to close/shut/free everything that needs calls before
1663      * exiting the loop.
1664      */
1665
1666 #if USE_WIN32_SERVICE
1667     WIN32_svcstatusupdate(SERVICE_STOP_PENDING, 10000);
1668 #endif
1669
1670     debugs(1, 1, "Shutting down...");
1671 #if USE_DNSSERVERS
1672
1673     dnsShutdown();
1674 #else
1675
1676     idnsShutdown();
1677 #endif
1678
1679     redirectShutdown();
1680     externalAclShutdown();
1681     icpConnectionClose();
1682 #if USE_HTCP
1683
1684     htcpSocketClose();
1685 #endif
1686 #ifdef SQUID_SNMP
1687
1688     snmpConnectionClose();
1689 #endif
1690 #if USE_WCCP
1691
1692     wccpConnectionClose();
1693 #endif
1694 #if USE_WCCPv2
1695
1696     wccp2ConnectionClose();
1697 #endif
1698
1699     releaseServerSockets();
1700     commCloseAllSockets();
1701
1702 #if USE_SQUID_ESI
1703     Esi::Clean();
1704 #endif
1705
1706 #if DELAY_POOLS
1707
1708     DelayPools::FreePools();
1709 #endif
1710
1711     authenticateShutdown();
1712 #if USE_WIN32_SERVICE
1713
1714     WIN32_svcstatusupdate(SERVICE_STOP_PENDING, 10000);
1715 #endif
1716
1717     Store::Root().sync(); /* Flush pending object writes/unlinks */
1718 #if USE_UNLINKD
1719
1720     unlinkdClose();       /* after sync/flush */
1721 #endif
1722
1723     storeDirWriteCleanLogs(0);
1724     PrintRusage();
1725     dumpMallocStats();
1726     Store::Root().sync();               /* Flush log writes */
1727     storeLogClose();
1728     accessLogClose();
1729     useragentLogClose();
1730     refererCloseLog();
1731 #if WIP_FWD_LOG
1732
1733     fwdUninit();
1734 #endif
1735
1736     Store::Root().sync();               /* Flush log close */
1737     StoreFileSystem::FreeAllFs();
1738     DiskIOModule::FreeAllModules();
1739 #if LEAK_CHECK_MODE && 0 /* doesn't work at the moment */
1740
1741     configFreeMemory();
1742     storeFreeMemory();
1743     /*stmemFreeMemory(); */
1744     netdbFreeMemory();
1745     ipcacheFreeMemory();
1746     fqdncacheFreeMemory();
1747     asnFreeMemory();
1748     clientdbFreeMemory();
1749     httpHeaderCleanModule();
1750     statFreeMemory();
1751     eventFreeMemory();
1752     mimeFreeMemory();
1753     errorClean();
1754 #endif
1755 #if !XMALLOC_TRACE
1756
1757     if (opt_no_daemon) {
1758         file_close(0);
1759         file_close(1);
1760         file_close(2);
1761     }
1762
1763 #endif
1764     fdDumpOpen();
1765
1766     comm_exit();
1767
1768     memClean();
1769
1770 #if XMALLOC_TRACE
1771
1772     xmalloc_find_leaks();
1773
1774     debugs(1, 0, "Memory used after shutdown: " << xmalloc_total);
1775
1776 #endif
1777 #if MEM_GEN_TRACE
1778
1779     log_trace_done();
1780
1781 #endif
1782
1783     if (Config.pidFilename && strcmp(Config.pidFilename, "none") != 0) {
1784         enter_suid();
1785         safeunlink(Config.pidFilename, 0);
1786         leave_suid();
1787     }
1788
1789     debugs(1, 1, "Squid Cache (Version " << version_string << "): Exiting normally.");
1790
1791     /*
1792      * DPW 2006-10-23
1793      * We used to fclose(debug_log) here if it was set, but then
1794      * we forgot to set it to NULL.  That caused some coredumps
1795      * because exit() ends up calling a bunch of destructors and
1796      * such.   So rather than forcing the debug_log to close, we'll
1797      * leave it open so that those destructors can write some
1798      * debugging if necessary.  The file will be closed anyway when
1799      * the process truly exits.
1800      */
1801
1802     exit(shutdown_status);
1803 }
1804