765 lines
21 KiB
C
765 lines
21 KiB
C
/*
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* daemon/unbound.c - main program for unbound DNS resolver daemon.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \file
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*
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* Main program to start the DNS resolver daemon.
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*/
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#include "config.h"
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#include <sys/time.h>
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#include "util/log.h"
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#include "daemon/daemon.h"
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#include "daemon/remote.h"
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#include "util/config_file.h"
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#include "util/storage/slabhash.h"
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#include "services/listen_dnsport.h"
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#include "services/cache/rrset.h"
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#include "services/cache/infra.h"
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#include "util/fptr_wlist.h"
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#include "util/data/msgreply.h"
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#include "util/module.h"
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#include "util/net_help.h"
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#include <signal.h>
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#include <fcntl.h>
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#include <openssl/crypto.h>
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_LOGIN_CAP_H
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#include <login_cap.h>
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#endif
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#ifdef USE_MINI_EVENT
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# ifdef USE_WINSOCK
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# include "util/winsock_event.h"
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# else
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# include "util/mini_event.h"
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# endif
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#else
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# include <event.h>
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#endif
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#ifdef UB_ON_WINDOWS
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# include "winrc/win_svc.h"
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#endif
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#ifdef HAVE_NSS
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/* nss3 */
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# include "nss.h"
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#endif
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#ifdef HAVE_SBRK
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/** global debug value to keep track of heap memory allocation */
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void* unbound_start_brk = 0;
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#endif
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#if !defined(HAVE_EVENT_BASE_GET_METHOD) && (defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
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static const char* ev_backend2str(int b)
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{
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switch(b) {
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case EVBACKEND_SELECT: return "select";
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case EVBACKEND_POLL: return "poll";
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case EVBACKEND_EPOLL: return "epoll";
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case EVBACKEND_KQUEUE: return "kqueue";
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case EVBACKEND_DEVPOLL: return "devpoll";
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case EVBACKEND_PORT: return "evport";
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}
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return "unknown";
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}
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#endif
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/** get the event system in use */
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static void get_event_sys(const char** n, const char** s, const char** m)
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{
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#ifdef USE_WINSOCK
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*n = "event";
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*s = "winsock";
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*m = "WSAWaitForMultipleEvents";
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#elif defined(USE_MINI_EVENT)
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*n = "mini-event";
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*s = "internal";
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*m = "select";
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#else
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struct event_base* b;
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*s = event_get_version();
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# ifdef HAVE_EVENT_BASE_GET_METHOD
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*n = "libevent";
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b = event_base_new();
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*m = event_base_get_method(b);
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# elif defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
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*n = "libev";
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b = (struct event_base*)ev_default_loop(EVFLAG_AUTO);
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*m = ev_backend2str(ev_backend((struct ev_loop*)b));
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# else
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*n = "unknown";
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*m = "not obtainable";
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b = NULL;
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# endif
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# ifdef HAVE_EVENT_BASE_FREE
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event_base_free(b);
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# endif
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#endif
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}
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/** print usage. */
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static void usage()
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{
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const char** m;
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const char *evnm="event", *evsys="", *evmethod="";
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printf("usage: unbound [options]\n");
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printf(" start unbound daemon DNS resolver.\n");
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printf("-h this help\n");
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printf("-c file config file to read instead of %s\n", CONFIGFILE);
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printf(" file format is described in unbound.conf(5).\n");
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printf("-d do not fork into the background.\n");
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printf("-v verbose (more times to increase verbosity)\n");
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#ifdef UB_ON_WINDOWS
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printf("-w opt windows option: \n");
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printf(" install, remove - manage the services entry\n");
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printf(" service - used to start from services control panel\n");
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#endif
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printf("Version %s\n", PACKAGE_VERSION);
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get_event_sys(&evnm, &evsys, &evmethod);
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printf("linked libs: %s %s (it uses %s), ldns %s, %s\n",
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evnm, evsys, evmethod, ldns_version(),
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#ifdef HAVE_SSL
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SSLeay_version(SSLEAY_VERSION)
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#elif defined(HAVE_NSS)
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NSS_GetVersion()
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#endif
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);
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printf("linked modules:");
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for(m = module_list_avail(); *m; m++)
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printf(" %s", *m);
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printf("\n");
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printf("BSD licensed, see LICENSE in source package for details.\n");
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printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
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}
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#ifndef unbound_testbound
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int replay_var_compare(const void* ATTR_UNUSED(a), const void* ATTR_UNUSED(b))
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{
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log_assert(0);
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return 0;
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}
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#endif
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/** check file descriptor count */
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static void
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checkrlimits(struct config_file* cfg)
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{
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#ifdef HAVE_GETRLIMIT
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/* list has number of ports to listen to, ifs number addresses */
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int list = ((cfg->do_udp?1:0) + (cfg->do_tcp?1 +
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(int)cfg->incoming_num_tcp:0));
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size_t listen_ifs = (size_t)(cfg->num_ifs==0?
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((cfg->do_ip4 && !cfg->if_automatic?1:0) +
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(cfg->do_ip6?1:0)):cfg->num_ifs);
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size_t listen_num = list*listen_ifs;
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size_t outudpnum = (size_t)cfg->outgoing_num_ports;
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size_t outtcpnum = cfg->outgoing_num_tcp;
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size_t misc = 4; /* logfile, pidfile, stdout... */
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size_t perthread_noudp = listen_num + outtcpnum +
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2/*cmdpipe*/ + 2/*libevent*/ + misc;
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size_t perthread = perthread_noudp + outudpnum;
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#if !defined(HAVE_PTHREAD) && !defined(HAVE_SOLARIS_THREADS)
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int numthread = 1; /* it forks */
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#else
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int numthread = (cfg->num_threads?cfg->num_threads:1);
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#endif
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size_t total = numthread * perthread + misc;
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size_t avail;
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struct rlimit rlim;
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if(total > 1024 &&
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strncmp(event_get_version(), "mini-event", 10) == 0) {
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log_warn("too many file descriptors requested. The builtin"
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"mini-event cannot handle more than 1024. Config "
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"for less fds or compile with libevent");
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if(numthread*perthread_noudp+15 > 1024)
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fatal_exit("too much tcp. not enough fds.");
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cfg->outgoing_num_ports = (int)((1024
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- numthread*perthread_noudp
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- 10 /* safety margin */) /numthread);
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log_warn("continuing with less udp ports: %u",
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cfg->outgoing_num_ports);
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total = 1024;
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}
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if(perthread > 64 &&
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strncmp(event_get_version(), "winsock-event", 13) == 0) {
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log_err("too many file descriptors requested. The winsock"
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" event handler cannot handle more than 64 per "
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" thread. Config for less fds");
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if(perthread_noudp+2 > 64)
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fatal_exit("too much tcp. not enough fds.");
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cfg->outgoing_num_ports = (int)((64
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- perthread_noudp
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- 2/* safety margin */));
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log_warn("continuing with less udp ports: %u",
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cfg->outgoing_num_ports);
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total = numthread*(perthread_noudp+
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(size_t)cfg->outgoing_num_ports)+misc;
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}
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if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
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log_warn("getrlimit: %s", strerror(errno));
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return;
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}
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if(rlim.rlim_cur == (rlim_t)RLIM_INFINITY)
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return;
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if((size_t)rlim.rlim_cur < total) {
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avail = (size_t)rlim.rlim_cur;
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rlim.rlim_cur = (rlim_t)(total + 10);
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rlim.rlim_max = (rlim_t)(total + 10);
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#ifdef HAVE_SETRLIMIT
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if(setrlimit(RLIMIT_NOFILE, &rlim) < 0) {
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log_warn("setrlimit: %s", strerror(errno));
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#else
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if(1) {
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#endif
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log_warn("cannot increase max open fds from %u to %u",
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(unsigned)avail, (unsigned)total+10);
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/* check that calculation below does not underflow,
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* with 15 as margin */
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if(numthread*perthread_noudp+15 > avail)
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fatal_exit("too much tcp. not enough fds.");
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cfg->outgoing_num_ports = (int)((avail
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- numthread*perthread_noudp
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- 10 /* safety margin */) /numthread);
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log_warn("continuing with less udp ports: %u",
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cfg->outgoing_num_ports);
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log_warn("increase ulimit or decrease threads, "
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"ports in config to remove this warning");
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return;
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}
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log_warn("increased limit(open files) from %u to %u",
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(unsigned)avail, (unsigned)total+10);
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}
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#else
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(void)cfg;
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#endif /* HAVE_GETRLIMIT */
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}
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/** set verbosity, check rlimits, cache settings */
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static void
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apply_settings(struct daemon* daemon, struct config_file* cfg,
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int cmdline_verbose)
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{
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/* apply if they have changed */
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verbosity = cmdline_verbose + cfg->verbosity;
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daemon_apply_cfg(daemon, cfg);
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checkrlimits(cfg);
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}
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#ifdef HAVE_KILL
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/** Read existing pid from pidfile.
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* @param file: file name of pid file.
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* @return: the pid from the file or -1 if none.
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*/
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static pid_t
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readpid (const char* file)
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{
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int fd;
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pid_t pid;
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char pidbuf[32];
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char* t;
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ssize_t l;
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if ((fd = open(file, O_RDONLY)) == -1) {
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if(errno != ENOENT)
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log_err("Could not read pidfile %s: %s",
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file, strerror(errno));
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return -1;
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}
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if (((l = read(fd, pidbuf, sizeof(pidbuf)))) == -1) {
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if(errno != ENOENT)
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log_err("Could not read pidfile %s: %s",
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file, strerror(errno));
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close(fd);
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return -1;
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}
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close(fd);
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/* Empty pidfile means no pidfile... */
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if (l == 0) {
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return -1;
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}
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pidbuf[sizeof(pidbuf)-1] = 0;
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pid = (pid_t)strtol(pidbuf, &t, 10);
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if (*t && *t != '\n') {
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return -1;
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}
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return pid;
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}
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/** write pid to file.
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* @param pidfile: file name of pid file.
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* @param pid: pid to write to file.
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*/
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static void
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writepid (const char* pidfile, pid_t pid)
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{
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FILE* f;
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if ((f = fopen(pidfile, "w")) == NULL ) {
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log_err("cannot open pidfile %s: %s",
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pidfile, strerror(errno));
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return;
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}
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if(fprintf(f, "%lu\n", (unsigned long)pid) < 0) {
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log_err("cannot write to pidfile %s: %s",
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pidfile, strerror(errno));
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}
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fclose(f);
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}
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/**
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* check old pid file.
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* @param pidfile: the file name of the pid file.
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* @param inchroot: if pidfile is inchroot and we can thus expect to
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* be able to delete it.
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*/
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static void
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checkoldpid(char* pidfile, int inchroot)
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{
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pid_t old;
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if((old = readpid(pidfile)) != -1) {
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/* see if it is still alive */
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if(kill(old, 0) == 0 || errno == EPERM)
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log_warn("unbound is already running as pid %u.",
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(unsigned)old);
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else if(inchroot)
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log_warn("did not exit gracefully last time (%u)",
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(unsigned)old);
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}
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}
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#endif /* HAVE_KILL */
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/** detach from command line */
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static void
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detach(void)
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{
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#if defined(HAVE_DAEMON) && !defined(DEPRECATED_DAEMON)
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/* use POSIX daemon(3) function */
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if(daemon(1, 0) != 0)
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fatal_exit("daemon failed: %s", strerror(errno));
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#else /* no HAVE_DAEMON */
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#ifdef HAVE_FORK
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int fd;
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/* Take off... */
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switch (fork()) {
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case 0:
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break;
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case -1:
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fatal_exit("fork failed: %s", strerror(errno));
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default:
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/* exit interactive session */
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exit(0);
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}
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/* detach */
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#ifdef HAVE_SETSID
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if(setsid() == -1)
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fatal_exit("setsid() failed: %s", strerror(errno));
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#endif
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if ((fd = open("/dev/null", O_RDWR, 0)) != -1) {
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(void)dup2(fd, STDIN_FILENO);
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(void)dup2(fd, STDOUT_FILENO);
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(void)dup2(fd, STDERR_FILENO);
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if (fd > 2)
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(void)close(fd);
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}
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#endif /* HAVE_FORK */
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#endif /* HAVE_DAEMON */
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}
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/** daemonize, drop user priviliges and chroot if needed */
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static void
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perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
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const char** cfgfile)
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{
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#ifdef HAVE_GETPWNAM
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struct passwd *pwd = NULL;
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uid_t uid;
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gid_t gid;
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/* initialize, but not to 0 (root) */
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memset(&uid, 112, sizeof(uid));
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memset(&gid, 112, sizeof(gid));
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log_assert(cfg);
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if(cfg->username && cfg->username[0]) {
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if((pwd = getpwnam(cfg->username)) == NULL)
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fatal_exit("user '%s' does not exist.", cfg->username);
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uid = pwd->pw_uid;
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gid = pwd->pw_gid;
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/* endpwent below, in case we need pwd for setusercontext */
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}
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#endif
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/* init syslog (as root) if needed, before daemonize, otherwise
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* a fork error could not be printed since daemonize closed stderr.*/
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if(cfg->use_syslog) {
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log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
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}
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/* if using a logfile, we cannot open it because the logfile would
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* be created with the wrong permissions, we cannot chown it because
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* we cannot chown system logfiles, so we do not open at all.
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* So, using a logfile, the user does not see errors unless -d is
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* given to unbound on the commandline. */
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/* read ssl keys while superuser and outside chroot */
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#ifdef HAVE_SSL
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if(!(daemon->rc = daemon_remote_create(cfg)))
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fatal_exit("could not set up remote-control");
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if(cfg->ssl_service_key && cfg->ssl_service_key[0]) {
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if(!(daemon->listen_sslctx = listen_sslctx_create(
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cfg->ssl_service_key, cfg->ssl_service_pem, NULL)))
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fatal_exit("could not set up listen SSL_CTX");
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}
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if(!(daemon->connect_sslctx = connect_sslctx_create(NULL, NULL, NULL)))
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fatal_exit("could not set up connect SSL_CTX");
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#endif
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#ifdef HAVE_KILL
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/* check old pid file before forking */
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if(cfg->pidfile && cfg->pidfile[0]) {
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/* calculate position of pidfile */
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if(cfg->pidfile[0] == '/')
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daemon->pidfile = strdup(cfg->pidfile);
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else daemon->pidfile = fname_after_chroot(cfg->pidfile,
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cfg, 1);
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if(!daemon->pidfile)
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fatal_exit("pidfile alloc: out of memory");
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checkoldpid(daemon->pidfile,
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/* true if pidfile is inside chrootdir, or nochroot */
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!(cfg->chrootdir && cfg->chrootdir[0]) ||
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(cfg->chrootdir && cfg->chrootdir[0] &&
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strncmp(daemon->pidfile, cfg->chrootdir,
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strlen(cfg->chrootdir))==0));
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}
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#endif
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/* daemonize because pid is needed by the writepid func */
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if(!debug_mode && cfg->do_daemonize) {
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detach();
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}
|
|
|
|
/* write new pidfile (while still root, so can be outside chroot) */
|
|
#ifdef HAVE_KILL
|
|
if(cfg->pidfile && cfg->pidfile[0]) {
|
|
writepid(daemon->pidfile, getpid());
|
|
if(!(cfg->chrootdir && cfg->chrootdir[0]) ||
|
|
(cfg->chrootdir && cfg->chrootdir[0] &&
|
|
strncmp(daemon->pidfile, cfg->chrootdir,
|
|
strlen(cfg->chrootdir))==0)) {
|
|
/* delete of pidfile could potentially work,
|
|
* chown to get permissions */
|
|
if(cfg->username && cfg->username[0]) {
|
|
if(chown(daemon->pidfile, uid, gid) == -1) {
|
|
log_err("cannot chown %u.%u %s: %s",
|
|
(unsigned)uid, (unsigned)gid,
|
|
daemon->pidfile, strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
(void)daemon;
|
|
#endif
|
|
|
|
/* Set user context */
|
|
#ifdef HAVE_GETPWNAM
|
|
if(cfg->username && cfg->username[0]) {
|
|
#ifdef HAVE_SETUSERCONTEXT
|
|
/* setusercontext does initgroups, setuid, setgid, and
|
|
* also resource limits from login config, but we
|
|
* still call setresuid, setresgid to be sure to set all uid*/
|
|
if(setusercontext(NULL, pwd, uid,
|
|
LOGIN_SETALL & ~LOGIN_SETUSER & ~LOGIN_SETGROUP) != 0)
|
|
log_warn("unable to setusercontext %s: %s",
|
|
cfg->username, strerror(errno));
|
|
#endif /* HAVE_SETUSERCONTEXT */
|
|
}
|
|
#endif /* HAVE_GETPWNAM */
|
|
|
|
/* box into the chroot */
|
|
#ifdef HAVE_CHROOT
|
|
if(cfg->chrootdir && cfg->chrootdir[0]) {
|
|
if(chdir(cfg->chrootdir)) {
|
|
fatal_exit("unable to chdir to chroot %s: %s",
|
|
cfg->chrootdir, strerror(errno));
|
|
}
|
|
verbose(VERB_QUERY, "chdir to %s", cfg->chrootdir);
|
|
if(chroot(cfg->chrootdir))
|
|
fatal_exit("unable to chroot to %s: %s",
|
|
cfg->chrootdir, strerror(errno));
|
|
if(chdir("/"))
|
|
fatal_exit("unable to chdir to / in chroot %s: %s",
|
|
cfg->chrootdir, strerror(errno));
|
|
verbose(VERB_QUERY, "chroot to %s", cfg->chrootdir);
|
|
if(strncmp(*cfgfile, cfg->chrootdir,
|
|
strlen(cfg->chrootdir)) == 0)
|
|
(*cfgfile) += strlen(cfg->chrootdir);
|
|
|
|
/* adjust stored pidfile for chroot */
|
|
if(daemon->pidfile && daemon->pidfile[0] &&
|
|
strncmp(daemon->pidfile, cfg->chrootdir,
|
|
strlen(cfg->chrootdir))==0) {
|
|
char* old = daemon->pidfile;
|
|
daemon->pidfile = strdup(old+strlen(cfg->chrootdir));
|
|
free(old);
|
|
if(!daemon->pidfile)
|
|
log_err("out of memory in pidfile adjust");
|
|
}
|
|
daemon->chroot = strdup(cfg->chrootdir);
|
|
if(!daemon->chroot)
|
|
log_err("out of memory in daemon chroot dir storage");
|
|
}
|
|
#else
|
|
(void)cfgfile;
|
|
#endif
|
|
/* change to working directory inside chroot */
|
|
if(cfg->directory && cfg->directory[0]) {
|
|
char* dir = cfg->directory;
|
|
if(cfg->chrootdir && cfg->chrootdir[0] &&
|
|
strncmp(dir, cfg->chrootdir,
|
|
strlen(cfg->chrootdir)) == 0)
|
|
dir += strlen(cfg->chrootdir);
|
|
if(dir[0]) {
|
|
if(chdir(dir)) {
|
|
fatal_exit("Could not chdir to %s: %s",
|
|
dir, strerror(errno));
|
|
}
|
|
verbose(VERB_QUERY, "chdir to %s", dir);
|
|
}
|
|
}
|
|
|
|
/* drop permissions after chroot, getpwnam, pidfile, syslog done*/
|
|
#ifdef HAVE_GETPWNAM
|
|
if(cfg->username && cfg->username[0]) {
|
|
# ifdef HAVE_INITGROUPS
|
|
if(initgroups(cfg->username, gid) != 0)
|
|
log_warn("unable to initgroups %s: %s",
|
|
cfg->username, strerror(errno));
|
|
# endif /* HAVE_INITGROUPS */
|
|
endpwent();
|
|
|
|
#ifdef HAVE_SETRESGID
|
|
if(setresgid(gid,gid,gid) != 0)
|
|
#elif defined(HAVE_SETREGID) && !defined(DARWIN_BROKEN_SETREUID)
|
|
if(setregid(gid,gid) != 0)
|
|
#else /* use setgid */
|
|
if(setgid(gid) != 0)
|
|
#endif /* HAVE_SETRESGID */
|
|
fatal_exit("unable to set group id of %s: %s",
|
|
cfg->username, strerror(errno));
|
|
#ifdef HAVE_SETRESUID
|
|
if(setresuid(uid,uid,uid) != 0)
|
|
#elif defined(HAVE_SETREUID) && !defined(DARWIN_BROKEN_SETREUID)
|
|
if(setreuid(uid,uid) != 0)
|
|
#else /* use setuid */
|
|
if(setuid(uid) != 0)
|
|
#endif /* HAVE_SETRESUID */
|
|
fatal_exit("unable to set user id of %s: %s",
|
|
cfg->username, strerror(errno));
|
|
verbose(VERB_QUERY, "drop user privileges, run as %s",
|
|
cfg->username);
|
|
}
|
|
#endif /* HAVE_GETPWNAM */
|
|
/* file logging inited after chroot,chdir,setuid is done so that
|
|
* it would succeed on SIGHUP as well */
|
|
if(!cfg->use_syslog)
|
|
log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
|
|
}
|
|
|
|
/**
|
|
* Run the daemon.
|
|
* @param cfgfile: the config file name.
|
|
* @param cmdline_verbose: verbosity resulting from commandline -v.
|
|
* These increase verbosity as specified in the config file.
|
|
* @param debug_mode: if set, do not daemonize.
|
|
*/
|
|
static void
|
|
run_daemon(const char* cfgfile, int cmdline_verbose, int debug_mode)
|
|
{
|
|
struct config_file* cfg = NULL;
|
|
struct daemon* daemon = NULL;
|
|
int done_setup = 0;
|
|
|
|
if(!(daemon = daemon_init()))
|
|
fatal_exit("alloc failure");
|
|
while(!daemon->need_to_exit) {
|
|
if(done_setup)
|
|
verbose(VERB_OPS, "Restart of %s.", PACKAGE_STRING);
|
|
else verbose(VERB_OPS, "Start of %s.", PACKAGE_STRING);
|
|
|
|
/* config stuff */
|
|
if(!(cfg = config_create()))
|
|
fatal_exit("Could not alloc config defaults");
|
|
if(!config_read(cfg, cfgfile, daemon->chroot)) {
|
|
if(errno != ENOENT)
|
|
fatal_exit("Could not read config file: %s",
|
|
cfgfile);
|
|
log_warn("Continuing with default config settings");
|
|
}
|
|
apply_settings(daemon, cfg, cmdline_verbose);
|
|
|
|
/* prepare */
|
|
if(!daemon_open_shared_ports(daemon))
|
|
fatal_exit("could not open ports");
|
|
if(!done_setup) {
|
|
perform_setup(daemon, cfg, debug_mode, &cfgfile);
|
|
done_setup = 1;
|
|
} else {
|
|
/* reopen log after HUP to facilitate log rotation */
|
|
if(!cfg->use_syslog)
|
|
log_init(cfg->logfile, 0, cfg->chrootdir);
|
|
}
|
|
/* work */
|
|
daemon_fork(daemon);
|
|
|
|
/* clean up for restart */
|
|
verbose(VERB_ALGO, "cleanup.");
|
|
daemon_cleanup(daemon);
|
|
config_delete(cfg);
|
|
}
|
|
verbose(VERB_ALGO, "Exit cleanup.");
|
|
/* this unlink may not work if the pidfile is located outside
|
|
* of the chroot/workdir or we no longer have permissions */
|
|
if(daemon->pidfile) {
|
|
int fd;
|
|
/* truncate pidfile */
|
|
fd = open(daemon->pidfile, O_WRONLY | O_TRUNC, 0644);
|
|
if(fd != -1)
|
|
close(fd);
|
|
/* delete pidfile */
|
|
unlink(daemon->pidfile);
|
|
}
|
|
daemon_delete(daemon);
|
|
}
|
|
|
|
/** getopt global, in case header files fail to declare it. */
|
|
extern int optind;
|
|
/** getopt global, in case header files fail to declare it. */
|
|
extern char* optarg;
|
|
|
|
/**
|
|
* main program. Set options given commandline arguments.
|
|
* @param argc: number of commandline arguments.
|
|
* @param argv: array of commandline arguments.
|
|
* @return: exit status of the program.
|
|
*/
|
|
int
|
|
main(int argc, char* argv[])
|
|
{
|
|
int c;
|
|
const char* cfgfile = CONFIGFILE;
|
|
const char* winopt = NULL;
|
|
int cmdline_verbose = 0;
|
|
int debug_mode = 0;
|
|
#ifdef UB_ON_WINDOWS
|
|
int cmdline_cfg = 0;
|
|
#endif
|
|
|
|
#ifdef HAVE_SBRK
|
|
/* take debug snapshot of heap */
|
|
unbound_start_brk = sbrk(0);
|
|
#endif
|
|
|
|
log_init(NULL, 0, NULL);
|
|
/* parse the options */
|
|
while( (c=getopt(argc, argv, "c:dhvw:")) != -1) {
|
|
switch(c) {
|
|
case 'c':
|
|
cfgfile = optarg;
|
|
#ifdef UB_ON_WINDOWS
|
|
cmdline_cfg = 1;
|
|
#endif
|
|
break;
|
|
case 'v':
|
|
cmdline_verbose ++;
|
|
verbosity++;
|
|
break;
|
|
case 'd':
|
|
debug_mode = 1;
|
|
break;
|
|
case 'w':
|
|
winopt = optarg;
|
|
break;
|
|
case '?':
|
|
case 'h':
|
|
default:
|
|
usage();
|
|
return 1;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if(winopt) {
|
|
#ifdef UB_ON_WINDOWS
|
|
wsvc_command_option(winopt, cfgfile, cmdline_verbose,
|
|
cmdline_cfg);
|
|
#else
|
|
fatal_exit("option not supported");
|
|
#endif
|
|
}
|
|
|
|
if(argc != 0) {
|
|
usage();
|
|
return 1;
|
|
}
|
|
|
|
run_daemon(cfgfile, cmdline_verbose, debug_mode);
|
|
log_init(NULL, 0, NULL); /* close logfile */
|
|
return 0;
|
|
}
|