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809 lines
20 KiB
809 lines
20 KiB
/*
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* Copyright (C) 2002 - 2006 Tomasz Kojm <tkojm@clamav.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/types.h>
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#ifndef _WIN32
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#include <sys/wait.h>
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#endif
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#include <sys/stat.h>
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#include <fcntl.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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#if defined(USE_SYSLOG) && !defined(C_AIX)
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#include <syslog.h>
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#endif
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include "libclamav/crypto.h"
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#include "target.h"
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#include "clamav.h"
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#include "freshclamcodes.h"
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#include "libclamav/others.h"
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#include "libclamav/str.h"
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#include "shared/optparser.h"
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#include "shared/output.h"
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#include "shared/misc.h"
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#include "execute.h"
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#include "manager.h"
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#include "mirman.h"
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static short terminate = 0;
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extern int active_children;
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static short foreground = 1;
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char updtmpdir[512], dbdir[512];
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int sigchld_wait = 1;
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const char *pidfile = NULL;
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char hostid[37];
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void submit_host_info(struct optstruct *opts);
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char *get_hostid(void *cbdata);
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static void
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sighandler (int sig)
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{
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switch (sig)
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{
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#ifdef SIGCHLD
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case SIGCHLD:
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if (sigchld_wait)
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waitpid (-1, NULL, WNOHANG);
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active_children--;
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break;
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#endif
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#ifdef SIGPIPE
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case SIGPIPE:
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/* no action, app will get EPIPE */
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break;
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#endif
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#ifdef SIGALRM
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case SIGALRM:
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terminate = -1;
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break;
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#endif
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#ifdef SIGUSR1
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case SIGUSR1:
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terminate = -1;
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break;
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#endif
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#ifdef SIGHUP
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case SIGHUP:
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terminate = -2;
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break;
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#endif
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default:
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if (*updtmpdir)
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cli_rmdirs (updtmpdir);
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if (pidfile)
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unlink (pidfile);
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logg ("Update process terminated\n");
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exit (2);
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}
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return;
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}
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static void
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writepid (const char *pidfile)
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{
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FILE *fd;
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int old_umask;
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old_umask = umask (0006);
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if ((fd = fopen (pidfile, "w")) == NULL)
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{
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logg ("!Can't save PID to file %s: %s\n", pidfile, strerror (errno));
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}
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else
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{
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fprintf (fd, "%d", (int) getpid ());
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fclose (fd);
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}
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umask (old_umask);
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}
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static void
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help (void)
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{
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mprintf_stdout = 1;
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mprintf ("\n");
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mprintf (" Clam AntiVirus: freshclam %s\n",
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get_version ());
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printf (" By The ClamAV Team: http://www.clamav.net/team\n");
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printf (" (C) 2007-2009 Sourcefire, Inc. et al.\n\n");
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mprintf (" --help -h show help\n");
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mprintf
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(" --version -V print version number and exit\n");
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mprintf (" --verbose -v be verbose\n");
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mprintf
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(" --debug enable debug messages\n");
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mprintf
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(" --quiet only output error messages\n");
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mprintf
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(" --no-warnings don't print and log warnings\n");
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mprintf
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(" --stdout write to stdout instead of stderr\n");
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mprintf ("\n");
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mprintf
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(" --config-file=FILE read configuration from FILE.\n");
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mprintf (" --log=FILE -l FILE log into FILE\n");
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#ifndef _WIN32
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mprintf (" --daemon -d run in daemon mode\n");
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mprintf
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(" --pid=FILE -p FILE save daemon's pid in FILE\n");
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mprintf (" --user=USER -u USER run as USER\n");
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#endif
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mprintf
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(" --no-dns force old non-DNS verification method\n");
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mprintf
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(" --checks=#n -c #n number of checks per day, 1 <= n <= 50\n");
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mprintf
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(" --datadir=DIRECTORY download new databases into DIRECTORY\n");
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#ifdef BUILD_CLAMD
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mprintf
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(" --daemon-notify[=/path/clamd.conf] send RELOAD command to clamd\n");
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#endif
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mprintf
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(" --local-address=IP -a IP bind to IP for HTTP downloads\n");
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mprintf
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(" --on-update-execute=COMMAND execute COMMAND after successful update\n");
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mprintf
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(" --on-error-execute=COMMAND execute COMMAND if errors occured\n");
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mprintf
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(" --on-outdated-execute=COMMAND execute COMMAND when software is outdated\n");
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mprintf
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(" --list-mirrors print mirrors from mirrors.dat\n");
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mprintf
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(" --submit-stats[=/path/clamd.conf] only submit detection statistics\n");
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mprintf
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(" --update-db=DBNAME only update database DBNAME\n");
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mprintf ("\n");
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}
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static int
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download (const struct optstruct *opts, const char *cfgfile)
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{
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int ret = 0, try = 1, maxattempts = 0;
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const struct optstruct *opt;
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maxattempts = optget (opts, "MaxAttempts")->numarg;
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logg ("*Max retries == %d\n", maxattempts);
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if (!(opt = optget (opts, "DatabaseMirror"))->enabled)
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{
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logg ("^You must specify at least one database mirror in %s\n",
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cfgfile);
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return FCE_CONFIG;
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}
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else
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{
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while (opt)
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{
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ret = downloadmanager (opts, opt->strarg, try);
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#ifndef _WIN32
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alarm (0);
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#endif
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if (ret == FCE_CONNECTION || ret == FCE_BADCVD
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|| ret == FCE_FAILEDGET || ret == FCE_MIRRORNOTSYNC)
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{
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if (try < maxattempts)
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{
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logg ("Trying again in 5 secs...\n");
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try++;
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sleep (5);
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continue;
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}
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else
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{
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logg ("Giving up on %s...\n", opt->strarg);
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opt = (struct optstruct *) opt->nextarg;
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if (!opt)
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{
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logg ("Update failed. Your network may be down or none of the mirrors listed in %s is working. Check http://www.clamav.net/support/mirror-problem for possible reasons.\n", cfgfile);
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}
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}
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}
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else
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{
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return ret;
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}
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}
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}
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return ret;
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}
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static void
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msg_callback (enum cl_msg severity, const char *fullmsg, const char *msg,
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void *ctx)
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{
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switch (severity)
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{
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case CL_MSG_ERROR:
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logg ("^[LibClamAV] %s", msg);
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break;
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case CL_MSG_WARN:
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logg ("~[LibClamAV] %s", msg);
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break;
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default:
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logg ("*[LibClamAV] %s", msg);
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break;
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}
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}
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int
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main (int argc, char **argv)
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{
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int ret = FCE_CONNECTION, retcl;
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const char *cfgfile, *arg = NULL;
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char *pt;
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struct optstruct *opts;
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const struct optstruct *opt;
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#ifndef _WIN32
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struct sigaction sigact;
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struct sigaction oldact;
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#endif
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#ifdef HAVE_PWD_H
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const char *dbowner;
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struct passwd *user;
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#endif
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STATBUF statbuf;
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struct mirdat mdat;
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if (check_flevel ())
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exit (FCE_INIT);
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if ((retcl = cl_init (CL_INIT_DEFAULT)))
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{
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mprintf ("!Can't initialize libclamav: %s\n", cl_strerror (retcl));
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return FCE_INIT;
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}
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if ((opts =
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optparse (NULL, argc, argv, 1, OPT_FRESHCLAM, 0, NULL)) == NULL)
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{
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mprintf ("!Can't parse command line options\n");
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return FCE_INIT;
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}
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if (optget (opts, "help")->enabled)
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{
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help ();
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optfree (opts);
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return 0;
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}
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/* parse the config file */
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cfgfile = optget (opts, "config-file")->strarg;
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pt = strdup (cfgfile);
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if ((opts =
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optparse (cfgfile, 0, NULL, 1, OPT_FRESHCLAM, 0, opts)) == NULL)
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{
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fprintf (stderr, "ERROR: Can't open/parse the config file %s\n", pt);
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free (pt);
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return FCE_INIT;
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}
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free (pt);
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if (optget (opts, "version")->enabled)
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{
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print_version (optget (opts, "DatabaseDirectory")->strarg);
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optfree (opts);
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return 0;
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}
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/* Stats/intelligence gathering */
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if (optget(opts, "stats-host-id")->enabled) {
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char *p = optget(opts, "stats-host-id")->strarg;
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if (strcmp(p, "default")) {
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if (strlen(p) > 36) {
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logg("!Invalid HostID\n");
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optfree(opts);
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return FCE_INIT;
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}
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strcpy(hostid, p);
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} else {
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strcpy(hostid, "default");
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}
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}
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submit_host_info(opts);
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if (optget (opts, "HTTPProxyPassword")->enabled)
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{
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if (CLAMSTAT (cfgfile, &statbuf) == -1)
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{
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logg ("^Can't stat %s (critical error)\n", cfgfile);
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optfree (opts);
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return FCE_CONFIG;
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}
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#ifndef _WIN32
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if (statbuf.
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st_mode & (S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IWOTH |
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S_IXOTH))
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{
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logg ("^Insecure permissions (for HTTPProxyPassword): %s must have no more than 0700 permissions.\n", cfgfile);
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optfree (opts);
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return FCE_CONFIG;
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}
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#endif
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}
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#ifdef HAVE_PWD_H
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/* freshclam shouldn't work with root privileges */
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dbowner = optget (opts, "DatabaseOwner")->strarg;
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if (!geteuid ())
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{
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if ((user = getpwnam (dbowner)) == NULL)
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{
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logg ("^Can't get information about user %s.\n", dbowner);
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optfree (opts);
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return FCE_USERINFO;
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}
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if (optget (opts, "AllowSupplementaryGroups")->enabled)
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{
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#ifdef HAVE_INITGROUPS
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if (initgroups (dbowner, user->pw_gid))
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{
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logg ("^initgroups() failed.\n");
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optfree (opts);
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return FCE_USERORGROUP;
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}
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#endif
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}
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else
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{
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#ifdef HAVE_SETGROUPS
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if (setgroups (1, &user->pw_gid))
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{
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logg ("^setgroups() failed.\n");
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optfree (opts);
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return FCE_USERORGROUP;
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}
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#endif
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}
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if (setgid (user->pw_gid))
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{
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logg ("^setgid(%d) failed.\n", (int) user->pw_gid);
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optfree (opts);
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return FCE_USERORGROUP;
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}
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if (setuid (user->pw_uid))
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{
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logg ("^setuid(%d) failed.\n", (int) user->pw_uid);
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optfree (opts);
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return FCE_USERORGROUP;
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}
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}
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#endif /* HAVE_PWD_H */
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/* initialize some important variables */
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if (optget (opts, "Debug")->enabled || optget (opts, "debug")->enabled)
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cl_debug ();
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if (optget (opts, "verbose")->enabled)
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mprintf_verbose = 1;
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if (optget (opts, "quiet")->enabled)
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mprintf_quiet = 1;
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if (optget (opts, "no-warnings")->enabled)
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{
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mprintf_nowarn = 1;
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logg_nowarn = 1;
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}
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if (optget (opts, "stdout")->enabled)
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mprintf_stdout = 1;
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/* initialize logger */
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logg_verbose = mprintf_verbose ? 1 : optget (opts, "LogVerbose")->enabled;
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logg_time = optget (opts, "LogTime")->enabled;
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logg_size = optget (opts, "LogFileMaxSize")->numarg;
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if (logg_size)
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logg_rotate = optget(opts, "LogRotate")->enabled;
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if ((opt = optget (opts, "UpdateLogFile"))->enabled)
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{
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logg_file = opt->strarg;
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if (logg ("#--------------------------------------\n"))
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{
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mprintf ("!Problem with internal logger (UpdateLogFile = %s).\n",
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logg_file);
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optfree (opts);
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return FCE_LOGGING;
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}
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}
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else
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logg_file = NULL;
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#if defined(USE_SYSLOG) && !defined(C_AIX)
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if (optget (opts, "LogSyslog")->enabled)
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{
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int fac = LOG_LOCAL6;
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if ((opt = optget (opts, "LogFacility"))->enabled)
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{
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if ((fac = logg_facility (opt->strarg)) == -1)
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{
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mprintf ("!LogFacility: %s: No such facility.\n",
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opt->strarg);
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optfree (opts);
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return FCE_LOGGING;
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}
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}
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openlog ("freshclam", LOG_PID, fac);
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logg_syslog = 1;
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}
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#endif
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cl_set_clcb_msg (msg_callback);
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/* change the current working directory */
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if (chdir (optget (opts, "DatabaseDirectory")->strarg))
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{
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logg ("!Can't change dir to %s\n",
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optget (opts, "DatabaseDirectory")->strarg);
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optfree (opts);
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return FCE_DIRECTORY;
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}
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else
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{
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if (!getcwd (dbdir, sizeof (dbdir)))
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{
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logg ("!getcwd() failed\n");
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optfree (opts);
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return FCE_DIRECTORY;
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}
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logg ("*Current working dir is %s\n", dbdir);
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}
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|
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if (optget (opts, "list-mirrors")->enabled)
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{
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if (mirman_read ("mirrors.dat", &mdat, 1) == -1)
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{
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printf ("Can't read mirrors.dat\n");
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optfree (opts);
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return FCE_FILE;
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}
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mirman_list (&mdat);
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mirman_free (&mdat);
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optfree (opts);
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return 0;
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}
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if ((opt = optget (opts, "PrivateMirror"))->enabled)
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{
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struct optstruct *dbm, *opth;
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dbm = (struct optstruct *) optget (opts, "DatabaseMirror");
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dbm->active = dbm->enabled = 1;
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do
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{
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if (cli_strbcasestr (opt->strarg, ".clamav.net"))
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{
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logg ("!PrivateMirror: *.clamav.net is not allowed in this mode\n");
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optfree (opts);
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return FCE_PRIVATEMIRROR;
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}
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if (dbm->strarg)
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free (dbm->strarg);
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dbm->strarg = strdup (opt->strarg);
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if (!dbm->strarg)
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{
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logg ("!strdup() failed\n");
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optfree (opts);
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return FCE_MEM;
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}
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if (!dbm->nextarg)
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{
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dbm->nextarg =
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(struct optstruct *) calloc (1,
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sizeof (struct optstruct));
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if (!dbm->nextarg)
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{
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logg ("!calloc() failed\n");
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optfree (opts);
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return FCE_MEM;
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}
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}
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opth = dbm;
|
|
dbm = dbm->nextarg;
|
|
}
|
|
while ((opt = opt->nextarg));
|
|
|
|
opth->nextarg = NULL;
|
|
while (dbm)
|
|
{
|
|
free (dbm->name);
|
|
free (dbm->cmd);
|
|
free (dbm->strarg);
|
|
opth = dbm;
|
|
dbm = dbm->nextarg;
|
|
free (opth);
|
|
}
|
|
|
|
/* disable DNS db checks */
|
|
opth = (struct optstruct *) optget (opts, "no-dns");
|
|
opth->active = opth->enabled = 1;
|
|
|
|
/* disable scripted updates */
|
|
opth = (struct optstruct *) optget (opts, "ScriptedUpdates");
|
|
opth->active = opth->enabled = 0;
|
|
}
|
|
|
|
*updtmpdir = 0;
|
|
|
|
#ifdef _WIN32
|
|
signal (SIGINT, sighandler);
|
|
#else
|
|
memset (&sigact, 0, sizeof (struct sigaction));
|
|
sigact.sa_handler = sighandler;
|
|
sigaction (SIGINT, &sigact, NULL);
|
|
sigaction (SIGPIPE, &sigact, NULL);
|
|
#endif
|
|
if (optget (opts, "daemon")->enabled)
|
|
{
|
|
int bigsleep, checks;
|
|
#ifndef _WIN32
|
|
time_t now, wakeup;
|
|
|
|
sigaction (SIGTERM, &sigact, NULL);
|
|
sigaction (SIGHUP, &sigact, NULL);
|
|
sigaction (SIGCHLD, &sigact, NULL);
|
|
#endif
|
|
|
|
checks = optget (opts, "Checks")->numarg;
|
|
|
|
if (checks <= 0)
|
|
{
|
|
logg ("^Number of checks must be a positive integer.\n");
|
|
optfree (opts);
|
|
return FCE_CHECKS;
|
|
}
|
|
|
|
if (!optget (opts, "DNSDatabaseInfo")->enabled
|
|
|| optget (opts, "no-dns")->enabled)
|
|
{
|
|
if (checks > 50)
|
|
{
|
|
logg ("^Number of checks must be between 1 and 50.\n");
|
|
optfree (opts);
|
|
return FCE_CHECKS;
|
|
}
|
|
}
|
|
|
|
bigsleep = 24 * 3600 / checks;
|
|
|
|
#ifndef _WIN32
|
|
if (!optget (opts, "Foreground")->enabled)
|
|
{
|
|
if (daemonize () == -1)
|
|
{
|
|
logg ("!daemonize() failed\n");
|
|
optfree (opts);
|
|
return FCE_FAILEDUPDATE;
|
|
}
|
|
foreground = 0;
|
|
mprintf_disabled = 1;
|
|
}
|
|
#endif
|
|
|
|
if ((opt = optget (opts, "PidFile"))->enabled)
|
|
{
|
|
pidfile = opt->strarg;
|
|
writepid (pidfile);
|
|
}
|
|
|
|
active_children = 0;
|
|
|
|
logg ("#freshclam daemon %s (OS: " TARGET_OS_TYPE ", ARCH: "
|
|
TARGET_ARCH_TYPE ", CPU: " TARGET_CPU_TYPE ")\n",
|
|
get_version ());
|
|
|
|
while (!terminate)
|
|
{
|
|
ret = download (opts, cfgfile);
|
|
|
|
if (ret > 1)
|
|
{
|
|
if ((opt = optget (opts, "OnErrorExecute"))->enabled)
|
|
arg = opt->strarg;
|
|
|
|
if (arg)
|
|
execute ("OnErrorExecute", arg, opts);
|
|
|
|
arg = NULL;
|
|
}
|
|
|
|
logg ("#--------------------------------------\n");
|
|
#ifdef SIGALRM
|
|
sigaction (SIGALRM, &sigact, &oldact);
|
|
#endif
|
|
#ifdef SIGUSR1
|
|
sigaction (SIGUSR1, &sigact, &oldact);
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
sleep (bigsleep);
|
|
#else
|
|
time (&wakeup);
|
|
wakeup += bigsleep;
|
|
alarm (bigsleep);
|
|
do
|
|
{
|
|
pause ();
|
|
time (&now);
|
|
}
|
|
while (!terminate && now < wakeup);
|
|
|
|
if (terminate == -1)
|
|
{
|
|
logg ("Received signal: wake up\n");
|
|
terminate = 0;
|
|
}
|
|
else if (terminate == -2)
|
|
{
|
|
logg ("Received signal: re-opening log file\n");
|
|
terminate = 0;
|
|
logg_close ();
|
|
}
|
|
#endif
|
|
|
|
#ifdef SIGALRM
|
|
sigaction (SIGALRM, &oldact, NULL);
|
|
#endif
|
|
#ifdef SIGUSR1
|
|
sigaction (SIGUSR1, &oldact, NULL);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
ret = download (opts, cfgfile);
|
|
}
|
|
|
|
if (ret > 1)
|
|
{
|
|
if ((opt = optget (opts, "OnErrorExecute"))->enabled)
|
|
execute ("OnErrorExecute", opt->strarg, opts);
|
|
}
|
|
|
|
if (pidfile)
|
|
{
|
|
unlink (pidfile);
|
|
}
|
|
|
|
optfree (opts);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
void submit_host_info(struct optstruct *opts)
|
|
{
|
|
struct optstruct *opt;
|
|
struct cl_engine *engine;
|
|
cli_intel_t *intel;
|
|
|
|
engine = cl_engine_new();
|
|
if (!(engine))
|
|
return;
|
|
|
|
intel = engine->stats_data;
|
|
if (!(intel)) {
|
|
engine->cb_stats_submit = NULL;
|
|
cl_engine_free(engine);
|
|
return;
|
|
}
|
|
|
|
intel->host_info = calloc(1, strlen(TARGET_OS_TYPE) + strlen(TARGET_ARCH_TYPE) + 2);
|
|
if (!(intel->host_info)) {
|
|
engine->cb_stats_submit = NULL;
|
|
cl_engine_free(engine);
|
|
return;
|
|
}
|
|
|
|
sprintf(intel->host_info, "%s %s", TARGET_OS_TYPE, TARGET_ARCH_TYPE);
|
|
|
|
if (!strcmp(hostid, "none"))
|
|
cl_engine_set_clcb_stats_get_hostid(engine, NULL);
|
|
else if (strcmp(hostid, "default"))
|
|
cl_engine_set_clcb_stats_get_hostid(engine, get_hostid);
|
|
|
|
if (optget(opts, "stats-timeout")->enabled) {
|
|
cl_engine_set_num(engine, CL_ENGINE_STATS_TIMEOUT, optget(opts, "StatsTimeout")->numarg);
|
|
}
|
|
|
|
cl_engine_free(engine);
|
|
}
|
|
|
|
int is_valid_hostid(void)
|
|
{
|
|
int count, i;
|
|
|
|
if (strlen(hostid) != 36)
|
|
return 0;
|
|
|
|
count=0;
|
|
for (i=0; i < 36; i++)
|
|
if (hostid[i] == '-')
|
|
count++;
|
|
|
|
if (count != 4)
|
|
return 0;
|
|
|
|
if (hostid[8] != '-' || hostid[13] != '-' || hostid[18] != '-' || hostid[23] != '-')
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
char *get_hostid(void *cbdata)
|
|
{
|
|
if (!strcmp(hostid, "none"))
|
|
return NULL;
|
|
|
|
if (!is_valid_hostid())
|
|
return strdup(STATS_ANON_UUID);
|
|
|
|
logg("HostID is valid: %s\n", hostid);
|
|
|
|
return strdup(hostid);
|
|
}
|
|
|