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515 lines
12 KiB
515 lines
12 KiB
/*
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* Copyright (C) 2002 - 2005 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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#ifdef _MSC_VER
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#include <winsock.h>
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#endif
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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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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#include <sys/time.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#ifdef C_WINDOWS
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#include <direct.h> /* for chdir */
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#else
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#include <pwd.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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#ifdef C_LINUX
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#include <sys/resource.h>
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#endif
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#include "target.h"
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#include "libclamav/clamav.h"
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#include "libclamav/others.h"
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#include "libclamav/matcher-ac.h"
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#include "libclamav/readdb.h"
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#include "shared/output.h"
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#include "shared/options.h"
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#include "shared/cfgparser.h"
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#include "shared/misc.h"
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#include "server.h"
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#include "tcpserver.h"
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#include "localserver.h"
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#include "others.h"
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#include "shared.h"
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#ifndef C_WINDOWS
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#define closesocket(s) close(s)
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#endif
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short debug_mode = 0, logok = 0;
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short foreground = 0;
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static void help(void)
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{
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printf("\n");
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printf(" Clam AntiVirus Daemon %s\n", get_version());
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printf(" (C) 2002 - 2007 ClamAV Team - http://www.clamav.net/team\n\n");
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printf(" --help -h Show this help.\n");
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printf(" --version -V Show version number.\n");
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printf(" --debug Enable debug mode.\n");
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printf(" --config-file=FILE -c FILE Read configuration from FILE.\n\n");
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}
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static struct cfgstruct *copt;
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/* needs to be global, so that valgrind reports it as reachable, and not
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* as definetely/indirectly lost when daemonizing clamd */
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static struct cl_engine *engine;
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int main(int argc, char **argv)
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{
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const struct cfgstruct *cpt;
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#ifndef C_WINDOWS
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struct passwd *user = NULL;
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#endif
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time_t currtime;
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const char *dbdir, *cfgfile;
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char *pua_cats = NULL;
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int ret, tcpsock = 0, localsock = 0, i;
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unsigned int sigs = 0;
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int lsockets[2], nlsockets = 0;
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unsigned int dboptions = 0;
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#ifdef C_LINUX
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struct stat sb;
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#endif
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struct optstruct *opt;
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const char *short_options = "hc:V";
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"config-file", 1, 0, 'c'},
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{"version", 0, 0, 'V'},
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{"debug", 0, 0, 0},
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{0, 0, 0, 0}
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};
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#ifdef C_WINDOWS
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if(!pthread_win32_process_attach_np()) {
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mprintf("!Can't start the win32 pthreads layer\n");
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return 1;
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}
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#endif
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opt = opt_parse(argc, argv, short_options, long_options, NULL, NULL);
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if(!opt) {
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mprintf("!Can't parse the command line\n");
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return 1;
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}
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if(opt_check(opt, "help")) {
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help();
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opt_free(opt);
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return 0;
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}
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if(opt_check(opt, "debug")) {
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#if defined(C_LINUX)
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/* njh@bandsman.co.uk: create a dump if needed */
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struct rlimit rlim;
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rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
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if(setrlimit(RLIMIT_CORE, &rlim) < 0)
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perror("setrlimit");
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#endif
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debug_mode = 1;
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}
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/* parse the config file */
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if(opt_check(opt, "config-file"))
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cfgfile = opt_arg(opt, "config-file");
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else
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cfgfile = CONFDIR"/clamd.conf";
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if((copt = getcfg(cfgfile, 1)) == NULL) {
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fprintf(stderr, "ERROR: Can't open/parse the config file %s\n", cfgfile);
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opt_free(opt);
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return 1;
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}
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if(opt_check(opt, "version")) {
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print_version(cfgopt(copt, "DatabaseDirectory")->strarg);
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opt_free(opt);
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freecfg(copt);
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return 0;
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}
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opt_free(opt);
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umask(0);
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/* drop privileges */
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#if (!defined(C_OS2)) && (!defined(C_WINDOWS))
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if(geteuid() == 0 && (cpt = cfgopt(copt, "User"))->enabled) {
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if((user = getpwnam(cpt->strarg)) == NULL) {
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fprintf(stderr, "ERROR: Can't get information about user %s.\n", cpt->strarg);
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freecfg(copt);
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return 1;
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}
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if(cfgopt(copt, "AllowSupplementaryGroups")->enabled) {
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#ifdef HAVE_INITGROUPS
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if(initgroups(cpt->strarg, user->pw_gid)) {
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fprintf(stderr, "ERROR: initgroups() failed.\n");
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freecfg(copt);
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return 1;
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}
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#else
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mprintf("!AllowSupplementaryGroups: initgroups() is not available, please disable AllowSupplementaryGroups in %s\n", cfgfile);
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freecfg(copt);
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return 1;
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#endif
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} else {
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#ifdef HAVE_SETGROUPS
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if(setgroups(1, &user->pw_gid)) {
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fprintf(stderr, "ERROR: setgroups() failed.\n");
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freecfg(copt);
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return 1;
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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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fprintf(stderr, "ERROR: setgid(%d) failed.\n", (int) user->pw_gid);
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freecfg(copt);
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return 1;
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}
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if(setuid(user->pw_uid)) {
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fprintf(stderr, "ERROR: setuid(%d) failed.\n", (int) user->pw_uid);
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freecfg(copt);
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return 1;
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}
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}
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#endif
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/* initialize logger */
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logg_lock = cfgopt(copt, "LogFileUnlock")->enabled;
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logg_time = cfgopt(copt, "LogTime")->enabled;
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logok = cfgopt(copt, "LogClean")->enabled;
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logg_size = cfgopt(copt, "LogFileMaxSize")->numarg;
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logg_verbose = mprintf_verbose = cfgopt(copt, "LogVerbose")->enabled;
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if((cpt = cfgopt(copt, "LogFile"))->enabled) {
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char timestr[32];
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logg_file = cpt->strarg;
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if(strlen(logg_file) < 2 || (logg_file[0] != '/' && logg_file[0] != '\\' && logg_file[1] != ':')) {
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fprintf(stderr, "ERROR: LogFile requires full path.\n");
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logg_close();
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freecfg(copt);
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return 1;
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}
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time(&currtime);
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if(logg("#+++ Started at %s", cli_ctime(&currtime, timestr, sizeof(timestr)))) {
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fprintf(stderr, "ERROR: Problem with internal logger. Please check the permissions on the %s file.\n", logg_file);
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logg_close();
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freecfg(copt);
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return 1;
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}
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} else
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logg_file = NULL;
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if((ret = cl_init(CL_INIT_DEFAULT))) {
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logg("!Can't initialize libclamav: %s\n", cl_strerror(ret));
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logg_close();
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freecfg(copt);
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return 1;
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}
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if(cfgopt(copt, "Debug")->enabled) /* enable debug messages in libclamav */
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cl_debug();
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#if defined(USE_SYSLOG) && !defined(C_AIX)
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if(cfgopt(copt, "LogSyslog")->enabled) {
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int fac = LOG_LOCAL6;
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cpt = cfgopt(copt, "LogFacility");
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if((fac = logg_facility(cpt->strarg)) == -1) {
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logg("!LogFacility: %s: No such facility.\n", cpt->strarg);
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logg_close();
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freecfg(copt);
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return 1;
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}
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openlog("clamd", LOG_PID, fac);
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logg_syslog = 1;
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}
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#endif
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#ifdef C_LINUX
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procdev = 0;
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if(stat("/proc", &sb) != -1 && !sb.st_size)
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procdev = sb.st_dev;
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#endif
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/* check socket type */
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if(cfgopt(copt, "TCPSocket")->enabled)
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tcpsock = 1;
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if(cfgopt(copt, "LocalSocket")->enabled)
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localsock = 1;
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if(!tcpsock && !localsock) {
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logg("!Please define server type (local and/or TCP).\n");
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logg_close();
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freecfg(copt);
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return 1;
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}
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/* set the temporary dir */
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if((cpt = cfgopt(copt, "TemporaryDirectory"))->enabled)
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cl_settempdir(cpt->strarg, 0);
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if(cfgopt(copt, "LeaveTemporaryFiles")->enabled)
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cl_settempdir(NULL, 1);
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logg("#clamd daemon %s (OS: "TARGET_OS_TYPE", ARCH: "TARGET_ARCH_TYPE", CPU: "TARGET_CPU_TYPE")\n", get_version());
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#ifndef C_WINDOWS
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if(user)
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logg("#Running as user %s (UID %u, GID %u)\n", user->pw_name, user->pw_uid, user->pw_gid);
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#endif
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if(logg_size)
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logg("#Log file size limited to %d bytes.\n", logg_size);
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else
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logg("#Log file size limit disabled.\n");
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if(!(engine = cl_engine_new())) {
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logg("!Can't initialize antivirus engine\n");
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logg_close();
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freecfg(copt);
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return 1;
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}
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/* load the database(s) */
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dbdir = cfgopt(copt, "DatabaseDirectory")->strarg;
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logg("#Reading databases from %s\n", dbdir);
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if(cfgopt(copt, "DetectPUA")->enabled) {
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dboptions |= CL_DB_PUA;
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if((cpt = cfgopt(copt, "ExcludePUA"))->enabled) {
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dboptions |= CL_DB_PUA_EXCLUDE;
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i = 0;
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logg("#Excluded PUA categories:");
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while(cpt) {
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if(!(pua_cats = realloc(pua_cats, i + strlen(cpt->strarg) + 3))) {
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logg("!Can't allocate memory for pua_cats\n");
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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logg("# %s", cpt->strarg);
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sprintf(pua_cats + i, ".%s", cpt->strarg);
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i += strlen(cpt->strarg) + 1;
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pua_cats[i] = 0;
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cpt = cpt->nextarg;
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}
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logg("#\n");
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pua_cats[i] = '.';
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pua_cats[i + 1] = 0;
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}
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if((cpt = cfgopt(copt, "IncludePUA"))->enabled) {
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if(pua_cats) {
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logg("!ExcludePUA and IncludePUA cannot be used at the same time\n");
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logg_close();
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freecfg(copt);
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free(pua_cats);
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cl_engine_free(engine);
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return 1;
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}
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dboptions |= CL_DB_PUA_INCLUDE;
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i = 0;
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logg("#Included PUA categories:");
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while(cpt) {
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if(!(pua_cats = realloc(pua_cats, i + strlen(cpt->strarg) + 3))) {
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logg("!Can't allocate memory for pua_cats\n");
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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logg("# %s", cpt->strarg);
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sprintf(pua_cats + i, ".%s", cpt->strarg);
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i += strlen(cpt->strarg) + 1;
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pua_cats[i] = 0;
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cpt = cpt->nextarg;
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}
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logg("#\n");
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pua_cats[i] = '.';
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pua_cats[i + 1] = 0;
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}
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if(pua_cats) {
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if((ret = cl_engine_set(engine, CL_ENGINE_PUA_CATEGORIES, pua_cats))) {
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logg("!cli_engine_set(CL_ENGINE_PUA_CATEGORIES) failed: %s\n", cl_strerror(ret));
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logg_close();
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freecfg(copt);
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free(pua_cats);
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cl_engine_free(engine);
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return 1;
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}
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free(pua_cats);
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}
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} else {
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logg("#Not loading PUA signatures.\n");
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}
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if(cfgopt(copt, "PhishingSignatures")->enabled)
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dboptions |= CL_DB_PHISHING;
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else
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logg("#Not loading phishing signatures.\n");
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if(cfgopt(copt,"PhishingScanURLs")->enabled)
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dboptions |= CL_DB_PHISHING_URLS;
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else
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logg("#Disabling URL based phishing detection.\n");
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if(cfgopt(copt,"DevACOnly")->enabled) {
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logg("#Only using the A-C matcher.\n");
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dboptions |= CL_DB_ACONLY;
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}
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if((cpt = cfgopt(copt, "DevACDepth"))->enabled) {
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cli_ac_setdepth(AC_DEFAULT_MIN_DEPTH, cpt->numarg);
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logg("#Max A-C depth set to %u\n", cpt->numarg);
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}
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if((ret = cl_load(dbdir, engine, &sigs, dboptions))) {
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logg("!%s\n", cl_strerror(ret));
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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logg("#Loaded %u signatures.\n", sigs);
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if((ret = cl_engine_compile(engine)) != 0) {
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logg("!Database initialization error: %s\n", cl_strerror(ret));
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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if(tcpsock) {
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#ifdef C_WINDOWS
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WSADATA wsaData;
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if(WSAStartup(MAKEWORD(2,2), &wsaData) != NO_ERROR) {
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logg("!Error at WSAStartup(): %d\n", WSAGetLastError());
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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#endif
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lsockets[nlsockets] = tcpserver(copt);
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if(lsockets[nlsockets] == -1) {
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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nlsockets++;
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}
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if(localsock) {
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lsockets[nlsockets] = localserver(copt);
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if(lsockets[nlsockets] == -1) {
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logg_close();
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freecfg(copt);
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if(tcpsock)
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closesocket(lsockets[0]);
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cl_engine_free(engine);
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return 1;
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}
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nlsockets++;
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}
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/* fork into background */
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if(!cfgopt(copt, "Foreground")->enabled) {
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#ifdef C_BSD
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/* workaround for OpenBSD bug, see https://wwws.clamav.net/bugzilla/show_bug.cgi?id=885 */
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for(ret=0;ret<nlsockets;ret++) {
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fcntl(lsockets[ret], F_SETFL, fcntl(lsockets[ret], F_GETFL) | O_NONBLOCK);
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}
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#endif
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if(daemonize() == -1) {
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logg("!daemonize() failed\n");
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logg_close();
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freecfg(copt);
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cl_engine_free(engine);
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return 1;
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}
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#ifdef C_BSD
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for(ret=0;ret<nlsockets;ret++) {
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fcntl(lsockets[ret], F_SETFL, fcntl(lsockets[ret], F_GETFL) & ~O_NONBLOCK);
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}
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#endif
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if(!debug_mode)
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if(chdir("/") == -1)
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logg("^Can't change current working directory to root\n");
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} else
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foreground = 1;
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ret = acceptloop_th(lsockets, nlsockets, engine, dboptions, copt);
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#ifdef C_WINDOWS
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if(tcpsock)
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WSACleanup();
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if(!pthread_win32_process_detach_np()) {
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logg("!Can't stop the win32 pthreads layer\n");
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logg_close();
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freecfg(copt);
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return 1;
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}
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#endif
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logg_close();
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freecfg(copt);
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return ret;
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|
}
|
|
|