/* * Copyright (C) 2004-2011 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1999-2003 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $Id: main.c,v 1.185 2011-11-09 18:44:03 each Exp $ */ /*! \file */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Defining NS_MAIN provides storage declarations (rather than extern) * for variables in named/globals.h. */ #define NS_MAIN 1 #include #include #include /* Explicit, though named/log.h includes it. */ #include #include #include #include #include #include #ifdef HAVE_LIBSCF #include #endif #ifdef OPENSSL #include #endif #ifdef HAVE_LIBXML2 #include #endif /* * Include header files for database drivers here. */ /* #include "xxdb.h" */ #ifdef CONTRIB_DLZ /* * Include contributed DLZ drivers if appropriate. */ #include #endif /* * The maximum number of stack frames to dump on assertion failure. */ #ifndef BACKTRACE_MAXFRAME #define BACKTRACE_MAXFRAME 128 #endif static isc_boolean_t want_stats = ISC_FALSE; static char program_name[ISC_DIR_NAMEMAX] = "named"; static char absolute_conffile[ISC_DIR_PATHMAX]; static char saved_command_line[512]; static char version[512]; static unsigned int maxsocks = 0; static int maxudp = 0; void ns_main_earlywarning(const char *format, ...) { va_list args; va_start(args, format); if (ns_g_lctx != NULL) { isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_WARNING, format, args); } else { fprintf(stderr, "%s: ", program_name); vfprintf(stderr, format, args); fprintf(stderr, "\n"); fflush(stderr); } va_end(args); } void ns_main_earlyfatal(const char *format, ...) { va_list args; va_start(args, format); if (ns_g_lctx != NULL) { isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, format, args); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "exiting (due to early fatal error)"); } else { fprintf(stderr, "%s: ", program_name); vfprintf(stderr, format, args); fprintf(stderr, "\n"); fflush(stderr); } va_end(args); exit(1); } ISC_PLATFORM_NORETURN_PRE static void assertion_failed(const char *file, int line, isc_assertiontype_t type, const char *cond) ISC_PLATFORM_NORETURN_POST; static void assertion_failed(const char *file, int line, isc_assertiontype_t type, const char *cond) { void *tracebuf[BACKTRACE_MAXFRAME]; int i, nframes; isc_result_t result; const char *logsuffix = ""; const char *fname; /* * Handle assertion failures. */ if (ns_g_lctx != NULL) { /* * Reset the assertion callback in case it is the log * routines causing the assertion. */ isc_assertion_setcallback(NULL); result = isc_backtrace_gettrace(tracebuf, BACKTRACE_MAXFRAME, &nframes); if (result == ISC_R_SUCCESS && nframes > 0) logsuffix = ", back trace"; isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "%s:%d: %s(%s) failed%s", file, line, isc_assertion_typetotext(type), cond, logsuffix); if (result == ISC_R_SUCCESS) { for (i = 0; i < nframes; i++) { unsigned long offset; fname = NULL; result = isc_backtrace_getsymbol(tracebuf[i], &fname, &offset); if (result == ISC_R_SUCCESS) { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "#%d %p in %s()+0x%lx", i, tracebuf[i], fname, offset); } else { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "#%d %p in ??", i, tracebuf[i]); } } } isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "exiting (due to assertion failure)"); } else { fprintf(stderr, "%s:%d: %s(%s) failed\n", file, line, isc_assertion_typetotext(type), cond); fflush(stderr); } if (ns_g_coreok) abort(); exit(1); } ISC_PLATFORM_NORETURN_PRE static void library_fatal_error(const char *file, int line, const char *format, va_list args) ISC_FORMAT_PRINTF(3, 0) ISC_PLATFORM_NORETURN_POST; static void library_fatal_error(const char *file, int line, const char *format, va_list args) { /* * Handle isc_error_fatal() calls from our libraries. */ if (ns_g_lctx != NULL) { /* * Reset the error callback in case it is the log * routines causing the assertion. */ isc_error_setfatal(NULL); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "%s:%d: fatal error:", file, line); isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, format, args); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL, "exiting (due to fatal error in library)"); } else { fprintf(stderr, "%s:%d: fatal error: ", file, line); vfprintf(stderr, format, args); fprintf(stderr, "\n"); fflush(stderr); } if (ns_g_coreok) abort(); exit(1); } static void library_unexpected_error(const char *file, int line, const char *format, va_list args) ISC_FORMAT_PRINTF(3, 0); static void library_unexpected_error(const char *file, int line, const char *format, va_list args) { /* * Handle isc_error_unexpected() calls from our libraries. */ if (ns_g_lctx != NULL) { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_ERROR, "%s:%d: unexpected error:", file, line); isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_ERROR, format, args); } else { fprintf(stderr, "%s:%d: fatal error: ", file, line); vfprintf(stderr, format, args); fprintf(stderr, "\n"); fflush(stderr); } } static void lwresd_usage(void) { fprintf(stderr, "usage: lwresd [-4|-6] [-c conffile | -C resolvconffile] " "[-d debuglevel]\n" " [-f|-g] [-n number_of_cpus] [-p port] " "[-P listen-port] [-s]\n" " [-t chrootdir] [-u username] [-i pidfile]\n" " [-m {usage|trace|record|size|mctx}]\n"); } static void usage(void) { if (ns_g_lwresdonly) { lwresd_usage(); return; } fprintf(stderr, "usage: named [-4|-6] [-c conffile] [-d debuglevel] " "[-E engine] [-f|-g]\n" " [-n number_of_cpus] [-p port] [-s] " "[-t chrootdir] [-u username]\n" " [-m {usage|trace|record|size|mctx}]\n"); } static void save_command_line(int argc, char *argv[]) { int i; char *src; char *dst; char *eob; const char truncated[] = "..."; isc_boolean_t quoted = ISC_FALSE; dst = saved_command_line; eob = saved_command_line + sizeof(saved_command_line); for (i = 1; i < argc && dst < eob; i++) { *dst++ = ' '; src = argv[i]; while (*src != '\0' && dst < eob) { /* * This won't perfectly produce a shell-independent * pastable command line in all circumstances, but * comes close, and for practical purposes will * nearly always be fine. */ if (quoted || isalnum(*src & 0xff) || *src == '-' || *src == '_' || *src == '.' || *src == '/') { *dst++ = *src++; quoted = ISC_FALSE; } else { *dst++ = '\\'; quoted = ISC_TRUE; } } } INSIST(sizeof(saved_command_line) >= sizeof(truncated)); if (dst == eob) strcpy(eob - sizeof(truncated), truncated); else *dst = '\0'; } static int parse_int(char *arg, const char *desc) { char *endp; int tmp; long int ltmp; ltmp = strtol(arg, &endp, 10); tmp = (int) ltmp; if (*endp != '\0') ns_main_earlyfatal("%s '%s' must be numeric", desc, arg); if (tmp < 0 || tmp != ltmp) ns_main_earlyfatal("%s '%s' out of range", desc, arg); return (tmp); } static struct flag_def { const char *name; unsigned int value; } mem_debug_flags[] = { { "trace", ISC_MEM_DEBUGTRACE }, { "record", ISC_MEM_DEBUGRECORD }, { "usage", ISC_MEM_DEBUGUSAGE }, { "size", ISC_MEM_DEBUGSIZE }, { "mctx", ISC_MEM_DEBUGCTX }, { NULL, 0 } }; static void set_flags(const char *arg, struct flag_def *defs, unsigned int *ret) { for (;;) { const struct flag_def *def; const char *end = strchr(arg, ','); int arglen; if (end == NULL) end = arg + strlen(arg); arglen = end - arg; for (def = defs; def->name != NULL; def++) { if (arglen == (int)strlen(def->name) && memcmp(arg, def->name, arglen) == 0) { *ret |= def->value; goto found; } } ns_main_earlyfatal("unrecognized flag '%.*s'", arglen, arg); found: if (*end == '\0') break; arg = end + 1; } } static void parse_command_line(int argc, char *argv[]) { int ch; int port; isc_boolean_t disable6 = ISC_FALSE; isc_boolean_t disable4 = ISC_FALSE; save_command_line(argc, argv); isc_commandline_errprint = ISC_FALSE; while ((ch = isc_commandline_parse(argc, argv, "46c:C:d:E:fFgi:lm:n:N:p:P:" "sS:t:T:U:u:vVx:")) != -1) { switch (ch) { case '4': if (disable4) ns_main_earlyfatal("cannot specify -4 and -6"); if (isc_net_probeipv4() != ISC_R_SUCCESS) ns_main_earlyfatal("IPv4 not supported by OS"); isc_net_disableipv6(); disable6 = ISC_TRUE; break; case '6': if (disable6) ns_main_earlyfatal("cannot specify -4 and -6"); if (isc_net_probeipv6() != ISC_R_SUCCESS) ns_main_earlyfatal("IPv6 not supported by OS"); isc_net_disableipv4(); disable4 = ISC_TRUE; break; case 'c': ns_g_conffile = isc_commandline_argument; lwresd_g_conffile = isc_commandline_argument; if (lwresd_g_useresolvconf) ns_main_earlyfatal("cannot specify -c and -C"); ns_g_conffileset = ISC_TRUE; break; case 'C': lwresd_g_resolvconffile = isc_commandline_argument; if (ns_g_conffileset) ns_main_earlyfatal("cannot specify -c and -C"); lwresd_g_useresolvconf = ISC_TRUE; break; case 'd': ns_g_debuglevel = parse_int(isc_commandline_argument, "debug level"); break; case 'E': ns_g_engine = isc_commandline_argument; break; case 'f': ns_g_foreground = ISC_TRUE; break; case 'g': ns_g_foreground = ISC_TRUE; ns_g_logstderr = ISC_TRUE; break; /* XXXBEW -i should be removed */ case 'i': lwresd_g_defaultpidfile = isc_commandline_argument; break; case 'l': ns_g_lwresdonly = ISC_TRUE; break; case 'm': set_flags(isc_commandline_argument, mem_debug_flags, &isc_mem_debugging); break; case 'N': /* Deprecated. */ case 'n': ns_g_cpus = parse_int(isc_commandline_argument, "number of cpus"); if (ns_g_cpus == 0) ns_g_cpus = 1; break; case 'p': port = parse_int(isc_commandline_argument, "port"); if (port < 1 || port > 65535) ns_main_earlyfatal("port '%s' out of range", isc_commandline_argument); ns_g_port = port; break; /* XXXBEW Should -P be removed? */ case 'P': port = parse_int(isc_commandline_argument, "port"); if (port < 1 || port > 65535) ns_main_earlyfatal("port '%s' out of range", isc_commandline_argument); lwresd_g_listenport = port; break; case 's': /* XXXRTH temporary syntax */ want_stats = ISC_TRUE; break; case 'S': maxsocks = parse_int(isc_commandline_argument, "max number of sockets"); break; case 't': /* XXXJAB should we make a copy? */ ns_g_chrootdir = isc_commandline_argument; break; case 'T': /* NOT DOCUMENTED */ /* * clienttest: make clients single shot with their * own memory context. */ if (!strcmp(isc_commandline_argument, "clienttest")) ns_g_clienttest = ISC_TRUE; else if (!strcmp(isc_commandline_argument, "nosoa")) ns_g_nosoa = ISC_TRUE; else if (!strcmp(isc_commandline_argument, "noaa")) ns_g_noaa = ISC_TRUE; else if (!strcmp(isc_commandline_argument, "maxudp512")) maxudp = 512; else if (!strcmp(isc_commandline_argument, "maxudp1460")) maxudp = 1460; else fprintf(stderr, "unknown -T flag '%s\n", isc_commandline_argument); break; case 'U': ns_g_udpdisp = parse_int(isc_commandline_argument, "number of UDP listeners " "per interface"); break; case 'u': ns_g_username = isc_commandline_argument; break; case 'v': printf("BIND %s\n", ns_g_version); exit(0); case 'V': printf("BIND %s built with %s\n", ns_g_version, ns_g_configargs); #ifdef OPENSSL printf("using OpenSSL version: %s\n", OPENSSL_VERSION_TEXT); #endif #ifdef HAVE_LIBXML2 printf("using libxml2 version: %s\n", LIBXML_DOTTED_VERSION); #endif exit(0); case 'F': /* Reserved for FIPS mode */ /* FALLTHROUGH */ case '?': usage(); if (isc_commandline_option == '?') exit(0); ns_main_earlyfatal("unknown option '-%c'", isc_commandline_option); /* FALLTHROUGH */ default: ns_main_earlyfatal("parsing options returned %d", ch); } } argc -= isc_commandline_index; argv += isc_commandline_index; POST(argv); if (argc > 0) { usage(); ns_main_earlyfatal("extra command line arguments"); } } static isc_result_t create_managers(void) { isc_result_t result; unsigned int socks; #ifdef ISC_PLATFORM_USETHREADS if (ns_g_cpus == 0) ns_g_cpus = ns_g_cpus_detected; isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER, ISC_LOG_INFO, "found %u CPU%s, using %u worker thread%s", ns_g_cpus_detected, ns_g_cpus_detected == 1 ? "" : "s", ns_g_cpus, ns_g_cpus == 1 ? "" : "s"); #else ns_g_cpus = 1; #endif if (ns_g_udpdisp == 0 || ns_g_udpdisp > ns_g_cpus) ns_g_udpdisp = ns_g_cpus; isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER, ISC_LOG_INFO, "using %u UDP listener%s per interface", ns_g_udpdisp, ns_g_udpdisp == 1 ? "" : "s"); result = isc_taskmgr_create(ns_g_mctx, ns_g_cpus, 0, &ns_g_taskmgr); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_taskmgr_create() failed: %s", isc_result_totext(result)); return (ISC_R_UNEXPECTED); } result = isc_timermgr_create(ns_g_mctx, &ns_g_timermgr); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_timermgr_create() failed: %s", isc_result_totext(result)); return (ISC_R_UNEXPECTED); } result = isc_socketmgr_create2(ns_g_mctx, &ns_g_socketmgr, maxsocks); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_socketmgr_create() failed: %s", isc_result_totext(result)); return (ISC_R_UNEXPECTED); } isc__socketmgr_maxudp(ns_g_socketmgr, maxudp); result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &socks); if (result == ISC_R_SUCCESS) { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER, ISC_LOG_INFO, "using up to %u sockets", socks); } result = isc_entropy_create(ns_g_mctx, &ns_g_entropy); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_entropy_create() failed: %s", isc_result_totext(result)); return (ISC_R_UNEXPECTED); } result = isc_hash_create(ns_g_mctx, ns_g_entropy, DNS_NAME_MAXWIRE); if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_hash_create() failed: %s", isc_result_totext(result)); return (ISC_R_UNEXPECTED); } return (ISC_R_SUCCESS); } static void destroy_managers(void) { ns_lwresd_shutdown(); isc_entropy_detach(&ns_g_entropy); if (ns_g_fallbackentropy != NULL) isc_entropy_detach(&ns_g_fallbackentropy); /* * isc_taskmgr_destroy() will block until all tasks have exited, */ isc_taskmgr_destroy(&ns_g_taskmgr); isc_timermgr_destroy(&ns_g_timermgr); isc_socketmgr_destroy(&ns_g_socketmgr); /* * isc_hash_destroy() cannot be called as long as a resolver may be * running. Calling this after isc_taskmgr_destroy() ensures the * call is safe. */ isc_hash_destroy(); } static void dump_symboltable() { int i; isc_result_t result; const char *fname; const void *addr; if (isc__backtrace_nsymbols == 0) return; if (!isc_log_wouldlog(ns_g_lctx, ISC_LOG_DEBUG(99))) return; isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_DEBUG(99), "Symbol table:"); for (i = 0, result = ISC_R_SUCCESS; result == ISC_R_SUCCESS; i++) { addr = NULL; fname = NULL; result = isc_backtrace_getsymbolfromindex(i, &addr, &fname); if (result == ISC_R_SUCCESS) { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_DEBUG(99), "[%d] %p %s", i, addr, fname); } } } static void setup(void) { isc_result_t result; isc_resourcevalue_t old_openfiles; #ifdef HAVE_LIBSCF char *instance = NULL; #endif /* * Get the user and group information before changing the root * directory, so the administrator does not need to keep a copy * of the user and group databases in the chroot'ed environment. */ ns_os_inituserinfo(ns_g_username); /* * Initialize time conversion information */ ns_os_tzset(); ns_os_opendevnull(); #ifdef HAVE_LIBSCF /* Check if named is under smf control, before chroot. */ result = ns_smf_get_instance(&instance, 0, ns_g_mctx); /* We don't care about instance, just check if we got one. */ if (result == ISC_R_SUCCESS) ns_smf_got_instance = 1; else ns_smf_got_instance = 0; if (instance != NULL) isc_mem_free(ns_g_mctx, instance); #endif /* HAVE_LIBSCF */ #ifdef PATH_RANDOMDEV /* * Initialize system's random device as fallback entropy source * if running chroot'ed. */ if (ns_g_chrootdir != NULL) { result = isc_entropy_create(ns_g_mctx, &ns_g_fallbackentropy); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("isc_entropy_create() failed: %s", isc_result_totext(result)); result = isc_entropy_createfilesource(ns_g_fallbackentropy, PATH_RANDOMDEV); if (result != ISC_R_SUCCESS) { ns_main_earlywarning("could not open pre-chroot " "entropy source %s: %s", PATH_RANDOMDEV, isc_result_totext(result)); isc_entropy_detach(&ns_g_fallbackentropy); } } #endif #ifdef ISC_PLATFORM_USETHREADS /* * Check for the number of cpu's before ns_os_chroot(). */ ns_g_cpus_detected = isc_os_ncpus(); #endif ns_os_chroot(ns_g_chrootdir); /* * For operating systems which have a capability mechanism, now * is the time to switch to minimal privs and change our user id. * On traditional UNIX systems, this call will be a no-op, and we * will change the user ID after reading the config file the first * time. (We need to read the config file to know which possibly * privileged ports to bind() to.) */ ns_os_minprivs(); result = ns_log_init(ISC_TF(ns_g_username != NULL)); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("ns_log_init() failed: %s", isc_result_totext(result)); /* * Now is the time to daemonize (if we're not running in the * foreground). We waited until now because we wanted to get * a valid logging context setup. We cannot daemonize any later, * because calling create_managers() will create threads, which * would be lost after fork(). */ if (!ns_g_foreground) ns_os_daemonize(); /* * We call isc_app_start() here as some versions of FreeBSD's fork() * destroys all the signal handling it sets up. */ result = isc_app_start(); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("isc_app_start() failed: %s", isc_result_totext(result)); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "starting BIND %s%s", ns_g_version, saved_command_line); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "built with %s", ns_g_configargs); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "----------------------------------------------------"); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "BIND 9 is maintained by Internet Systems Consortium,"); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "Inc. (ISC), a non-profit 501(c)(3) public-benefit "); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "corporation. Support and training for BIND 9 are "); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "available at https://www.isc.org/support"); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "----------------------------------------------------"); dump_symboltable(); /* * Get the initial resource limits. */ (void)isc_resource_getlimit(isc_resource_stacksize, &ns_g_initstacksize); (void)isc_resource_getlimit(isc_resource_datasize, &ns_g_initdatasize); (void)isc_resource_getlimit(isc_resource_coresize, &ns_g_initcoresize); (void)isc_resource_getlimit(isc_resource_openfiles, &ns_g_initopenfiles); /* * System resources cannot effectively be tuned on some systems. * Raise the limit in such cases for safety. */ old_openfiles = ns_g_initopenfiles; ns_os_adjustnofile(); (void)isc_resource_getlimit(isc_resource_openfiles, &ns_g_initopenfiles); if (old_openfiles != ns_g_initopenfiles) { isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "adjusted limit on open files from " "%" ISC_PRINT_QUADFORMAT "u to " "%" ISC_PRINT_QUADFORMAT "u", old_openfiles, ns_g_initopenfiles); } /* * If the named configuration filename is relative, prepend the current * directory's name before possibly changing to another directory. */ if (! isc_file_isabsolute(ns_g_conffile)) { result = isc_file_absolutepath(ns_g_conffile, absolute_conffile, sizeof(absolute_conffile)); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("could not construct absolute path " "of configuration file: %s", isc_result_totext(result)); ns_g_conffile = absolute_conffile; } /* * Record the server's startup time. */ result = isc_time_now(&ns_g_boottime); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("isc_time_now() failed: %s", isc_result_totext(result)); result = create_managers(); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("create_managers() failed: %s", isc_result_totext(result)); ns_builtin_init(); /* * Add calls to register sdb drivers here. */ /* xxdb_init(); */ #ifdef ISC_DLZ_DLOPEN /* * Register the DLZ "dlopen" driver. */ result = dlz_dlopen_init(ns_g_mctx); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("dlz_dlopen_init() failed: %s", isc_result_totext(result)); #endif #if CONTRIB_DLZ /* * Register any other contributed DLZ drivers. */ result = dlz_drivers_init(); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("dlz_drivers_init() failed: %s", isc_result_totext(result)); #endif ns_server_create(ns_g_mctx, &ns_g_server); } static void cleanup(void) { destroy_managers(); ns_server_destroy(&ns_g_server); ns_builtin_deinit(); /* * Add calls to unregister sdb drivers here. */ /* xxdb_clear(); */ #ifdef CONTRIB_DLZ /* * Unregister contributed DLZ drivers. */ dlz_drivers_clear(); #endif #ifdef ISC_DLZ_DLOPEN /* * Unregister "dlopen" DLZ driver. */ dlz_dlopen_clear(); #endif dns_name_destroy(); isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN, ISC_LOG_NOTICE, "exiting"); ns_log_shutdown(); } static char *memstats = NULL; void ns_main_setmemstats(const char *filename) { /* * Caller has to ensure locking. */ if (memstats != NULL) { free(memstats); memstats = NULL; } if (filename == NULL) return; memstats = malloc(strlen(filename) + 1); if (memstats) strcpy(memstats, filename); } #ifdef HAVE_LIBSCF /* * Get FMRI for the named process. */ isc_result_t ns_smf_get_instance(char **ins_name, int debug, isc_mem_t *mctx) { scf_handle_t *h = NULL; int namelen; char *instance; REQUIRE(ins_name != NULL && *ins_name == NULL); if ((h = scf_handle_create(SCF_VERSION)) == NULL) { if (debug) UNEXPECTED_ERROR(__FILE__, __LINE__, "scf_handle_create() failed: %s", scf_strerror(scf_error())); return (ISC_R_FAILURE); } if (scf_handle_bind(h) == -1) { if (debug) UNEXPECTED_ERROR(__FILE__, __LINE__, "scf_handle_bind() failed: %s", scf_strerror(scf_error())); scf_handle_destroy(h); return (ISC_R_FAILURE); } if ((namelen = scf_myname(h, NULL, 0)) == -1) { if (debug) UNEXPECTED_ERROR(__FILE__, __LINE__, "scf_myname() failed: %s", scf_strerror(scf_error())); scf_handle_destroy(h); return (ISC_R_FAILURE); } if ((instance = isc_mem_allocate(mctx, namelen + 1)) == NULL) { UNEXPECTED_ERROR(__FILE__, __LINE__, "ns_smf_get_instance memory " "allocation failed: %s", isc_result_totext(ISC_R_NOMEMORY)); scf_handle_destroy(h); return (ISC_R_FAILURE); } if (scf_myname(h, instance, namelen + 1) == -1) { if (debug) UNEXPECTED_ERROR(__FILE__, __LINE__, "scf_myname() failed: %s", scf_strerror(scf_error())); scf_handle_destroy(h); isc_mem_free(mctx, instance); return (ISC_R_FAILURE); } scf_handle_destroy(h); *ins_name = instance; return (ISC_R_SUCCESS); } #endif /* HAVE_LIBSCF */ int main(int argc, char *argv[]) { isc_result_t result; #ifdef HAVE_LIBSCF char *instance = NULL; #endif /* * Record version in core image. * strings named.core | grep "named version:" */ strlcat(version, #if defined(NO_VERSION_DATE) || !defined(__DATE__) "named version: BIND " VERSION, #else "named version: BIND " VERSION " (" __DATE__ ")", #endif sizeof(version)); result = isc_file_progname(*argv, program_name, sizeof(program_name)); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("program name too long"); if (strcmp(program_name, "lwresd") == 0) ns_g_lwresdonly = ISC_TRUE; if (result != ISC_R_SUCCESS) ns_main_earlyfatal("failed to build internal symbol table"); isc_assertion_setcallback(assertion_failed); isc_error_setfatal(library_fatal_error); isc_error_setunexpected(library_unexpected_error); ns_os_init(program_name); dns_result_register(); dst_result_register(); isccc_result_register(); parse_command_line(argc, argv); /* * Warn about common configuration error. */ if (ns_g_chrootdir != NULL) { int len = strlen(ns_g_chrootdir); if (strncmp(ns_g_chrootdir, ns_g_conffile, len) == 0 && (ns_g_conffile[len] == '/' || ns_g_conffile[len] == '\\')) ns_main_earlywarning("config filename (-c %s) contains " "chroot path (-t %s)", ns_g_conffile, ns_g_chrootdir); } result = isc_mem_create(0, 0, &ns_g_mctx); if (result != ISC_R_SUCCESS) ns_main_earlyfatal("isc_mem_create() failed: %s", isc_result_totext(result)); isc_mem_setname(ns_g_mctx, "main", NULL); setup(); /* * Start things running and then wait for a shutdown request * or reload. */ do { result = isc_app_run(); if (result == ISC_R_RELOAD) { ns_server_reloadwanted(ns_g_server); } else if (result != ISC_R_SUCCESS) { UNEXPECTED_ERROR(__FILE__, __LINE__, "isc_app_run(): %s", isc_result_totext(result)); /* * Force exit. */ result = ISC_R_SUCCESS; } } while (result != ISC_R_SUCCESS); #ifdef HAVE_LIBSCF if (ns_smf_want_disable == 1) { result = ns_smf_get_instance(&instance, 1, ns_g_mctx); if (result == ISC_R_SUCCESS && instance != NULL) { if (smf_disable_instance(instance, 0) != 0) UNEXPECTED_ERROR(__FILE__, __LINE__, "smf_disable_instance() " "failed for %s : %s", instance, scf_strerror(scf_error())); } if (instance != NULL) isc_mem_free(ns_g_mctx, instance); } #endif /* HAVE_LIBSCF */ cleanup(); if (want_stats) { isc_mem_stats(ns_g_mctx, stdout); isc_mutex_stats(stdout); } if (ns_g_memstatistics && memstats != NULL) { FILE *fp = NULL; result = isc_stdio_open(memstats, "w", &fp); if (result == ISC_R_SUCCESS) { isc_mem_stats(ns_g_mctx, fp); isc_mutex_stats(fp); isc_stdio_close(fp); } } isc_mem_destroy(&ns_g_mctx); isc_mem_checkdestroyed(stderr); ns_main_setmemstats(NULL); isc_app_finish(); ns_os_closedevnull(); ns_os_shutdown(); return (0); }