mirror of https://github.com/Cisco-Talos/clamav
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
454 lines
11 KiB
454 lines
11 KiB
/*
|
|
* Copyright (C) 2002 - 2005 Tomasz Kojm <tkojm@clamav.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "clamav-config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
#include <syslog.h>
|
|
#endif
|
|
|
|
#include "options.h"
|
|
#include "manager.h"
|
|
#include "defaults.h"
|
|
#include "freshclam.h"
|
|
#include "output.h"
|
|
#include "target.h"
|
|
#include "misc.h"
|
|
#include "execute.h"
|
|
|
|
static short terminate = 0;
|
|
extern int active_children;
|
|
|
|
short foreground = 1;
|
|
|
|
static void daemon_sighandler(int sig) {
|
|
|
|
switch(sig) {
|
|
case SIGCHLD:
|
|
waitpid(-1, NULL, WNOHANG);
|
|
active_children--;
|
|
break;
|
|
|
|
case SIGALRM:
|
|
case SIGUSR1:
|
|
terminate = -1;
|
|
break;
|
|
|
|
case SIGHUP:
|
|
terminate = -2;
|
|
break;
|
|
|
|
default:
|
|
terminate = 1;
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static void writepid(char *pidfile) {
|
|
FILE *fd;
|
|
int old_umask;
|
|
old_umask = umask(0006);
|
|
if((fd = fopen(pidfile, "w")) == NULL) {
|
|
logg("!Can't save PID to file %s: %s\n", pidfile, strerror(errno));
|
|
} else {
|
|
fprintf(fd, "%d", (int) getpid());
|
|
fclose(fd);
|
|
}
|
|
umask(old_umask);
|
|
}
|
|
|
|
|
|
int freshclam(struct optstruct *opt)
|
|
{
|
|
int ret = 52;
|
|
char *newdir, *cfgfile;
|
|
char *pidfile = NULL;
|
|
struct cfgstruct *copt, *cpt;
|
|
struct sigaction sigact;
|
|
struct sigaction oldact;
|
|
#if !defined(C_CYGWIN) && !defined(C_OS2)
|
|
char *unpuser;
|
|
struct passwd *user;
|
|
#endif
|
|
struct stat statbuf;
|
|
|
|
if(optc(opt, 'h')) {
|
|
free_opt(opt);
|
|
help();
|
|
}
|
|
|
|
/* parse the config file */
|
|
if((cfgfile = getargl(opt, "config-file"))) {
|
|
copt = getcfg(cfgfile, 1);
|
|
} else {
|
|
/* TODO: force strict permissions on freshclam.conf */
|
|
if((copt = getcfg((cfgfile = CONFDIR"/freshclam.conf"), 1)) == NULL)
|
|
copt = getcfg((cfgfile = CONFDIR"/clamd.conf"), 1);
|
|
}
|
|
|
|
if(!copt) {
|
|
logg("!Can't parse the config file %s\n", cfgfile);
|
|
return 56;
|
|
}
|
|
|
|
if(optl(opt, "http-proxy") || optl(opt, "proxy-user"))
|
|
logg("WARNING: Proxy settings are now only configurable in the config file.\n");
|
|
|
|
if(cfgopt(copt, "HTTPProxyPassword")->enabled) {
|
|
if(stat(cfgfile, &statbuf) == -1) {
|
|
logg("^Can't stat %s (critical error)\n", cfgfile);
|
|
return 56;
|
|
}
|
|
#ifndef C_CYGWIN
|
|
if(statbuf.st_mode & (S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IWOTH | S_IXOTH)) {
|
|
logg("^Insecure permissions (for HTTPProxyPassword): %s must have no more than 0700 permissions.\n", cfgfile);
|
|
return 56;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if !defined(C_CYGWIN) && !defined(C_OS2)
|
|
/* freshclam shouldn't work with root privileges */
|
|
if(optc(opt, 'u')) {
|
|
unpuser = getargc(opt, 'u');
|
|
} else if((cpt = cfgopt(copt, "DatabaseOwner"))->enabled) {
|
|
unpuser = cpt->strarg;
|
|
} else {
|
|
unpuser = UNPUSER;
|
|
}
|
|
|
|
if(!geteuid()) {
|
|
if((user = getpwnam(unpuser)) == NULL) {
|
|
logg("^Can't get information about user %s.\n", unpuser);
|
|
exit(60); /* this is critical problem, so we just exit here */
|
|
}
|
|
|
|
if(cfgopt(copt, "AllowSupplementaryGroups")->enabled) {
|
|
#ifdef HAVE_INITGROUPS
|
|
if(initgroups(unpuser, user->pw_gid)) {
|
|
logg("^initgroups() failed.\n");
|
|
exit(61);
|
|
}
|
|
#endif
|
|
} else {
|
|
#ifdef HAVE_SETGROUPS
|
|
if(setgroups(1, &user->pw_gid)) {
|
|
logg("^setgroups() failed.\n");
|
|
exit(61);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if(setgid(user->pw_gid)) {
|
|
logg("^setgid(%d) failed.\n", (int) user->pw_gid);
|
|
exit(61);
|
|
}
|
|
|
|
if(setuid(user->pw_uid)) {
|
|
logg("^setuid(%d) failed.\n", (int) user->pw_uid);
|
|
exit(61);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* initialize some important variables */
|
|
|
|
if(optl(opt, "debug") || cfgopt(copt, "Debug")->enabled)
|
|
cl_debug();
|
|
|
|
if(optc(opt, 'v'))
|
|
mprintf_verbose = 1;
|
|
|
|
if(optl(opt, "quiet"))
|
|
mprintf_quiet = 1;
|
|
|
|
if(optl(opt, "stdout"))
|
|
mprintf_stdout = 1;
|
|
|
|
if(optc(opt, 'V')) {
|
|
print_version();
|
|
exit(0);
|
|
}
|
|
|
|
/* initialize logger */
|
|
|
|
if(cfgopt(copt, "LogVerbose")->enabled)
|
|
logg_verbose = 1;
|
|
|
|
if(optc(opt, 'l')) {
|
|
logg_file = getargc(opt, 'l');
|
|
if(logg("#--------------------------------------\n")) {
|
|
mprintf("!Problem with internal logger.\n");
|
|
exit(62);
|
|
}
|
|
} else if((cpt = cfgopt(copt, "UpdateLogFile"))->enabled) {
|
|
logg_file = cpt->strarg;
|
|
if(logg("#--------------------------------------\n")) {
|
|
mprintf("!Problem with internal logger.\n");
|
|
exit(62);
|
|
}
|
|
} else
|
|
logg_file = NULL;
|
|
|
|
#if defined(USE_SYSLOG) && !defined(C_AIX)
|
|
if(cfgopt(copt, "LogSyslog")->enabled) {
|
|
int fac = LOG_LOCAL6;
|
|
|
|
if((cpt = cfgopt(copt, "LogFacility"))->enabled) {
|
|
if((fac = logg_facility(cpt->strarg)) == -1) {
|
|
mprintf("!LogFacility: %s: No such facility.\n", cpt->strarg);
|
|
exit(62);
|
|
}
|
|
}
|
|
|
|
openlog("freshclam", LOG_PID, fac);
|
|
logg_syslog = 1;
|
|
}
|
|
#endif
|
|
|
|
/* change the current working directory */
|
|
if(optl(opt, "datadir"))
|
|
newdir = getargl(opt, "datadir");
|
|
else
|
|
newdir = cfgopt(copt, "DatabaseDirectory")->strarg;
|
|
|
|
if(chdir(newdir)) {
|
|
logg("Can't change dir to %s\n", newdir);
|
|
exit(50);
|
|
} else
|
|
logg("*Current working dir is %s\n", newdir);
|
|
|
|
|
|
if(optc(opt, 'd')) {
|
|
int bigsleep, checks;
|
|
time_t now, wakeup;
|
|
|
|
memset(&sigact, 0, sizeof(struct sigaction));
|
|
sigact.sa_handler = daemon_sighandler;
|
|
|
|
if(optc(opt, 'c'))
|
|
checks = atoi(getargc(opt, 'c'));
|
|
else
|
|
checks = cfgopt(copt, "Checks")->numarg;
|
|
|
|
if(checks <= 0) {
|
|
logg("^Number of checks must be a positive integer.\n");
|
|
exit(41);
|
|
}
|
|
|
|
if(!cfgopt(copt, "DNSDatabaseInfo")->enabled || optl(opt, "no-dns")) {
|
|
if(checks > 50) {
|
|
logg("^Number of checks must be between 1 and 50.\n");
|
|
exit(41);
|
|
}
|
|
}
|
|
|
|
bigsleep = 24 * 3600 / checks;
|
|
|
|
if(!cfgopt(copt, "Foreground")->enabled) {
|
|
foreground = 0;
|
|
daemonize();
|
|
}
|
|
|
|
if (optc(opt, 'p')) {
|
|
pidfile = getargc(opt, 'p');
|
|
} else if ((cpt = cfgopt(copt, "PidFile"))->enabled) {
|
|
pidfile = cpt->strarg;
|
|
}
|
|
if (pidfile) {
|
|
writepid(pidfile);
|
|
}
|
|
|
|
active_children = 0;
|
|
|
|
logg("#freshclam daemon "VERSION" (OS: "TARGET_OS_TYPE", ARCH: "TARGET_ARCH_TYPE", CPU: "TARGET_CPU_TYPE")\n");
|
|
|
|
sigaction(SIGTERM, &sigact, NULL);
|
|
sigaction(SIGHUP, &sigact, NULL);
|
|
sigaction(SIGINT, &sigact, NULL);
|
|
sigaction(SIGCHLD, &sigact, NULL);
|
|
|
|
while(!terminate) {
|
|
ret = download(copt, opt);
|
|
|
|
if(ret > 1) {
|
|
const char *arg = NULL;
|
|
|
|
if(optl(opt, "on-error-execute"))
|
|
arg = getargl(opt, "on-error-execute");
|
|
else if((cpt = cfgopt(copt, "OnErrorExecute"))->enabled)
|
|
arg = cpt->strarg;
|
|
|
|
if(arg)
|
|
execute("OnErrorExecute", arg);
|
|
}
|
|
|
|
logg("#--------------------------------------\n");
|
|
sigaction(SIGALRM, &sigact, &oldact);
|
|
sigaction(SIGUSR1, &sigact, &oldact);
|
|
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();
|
|
}
|
|
|
|
sigaction(SIGALRM, &oldact, NULL);
|
|
sigaction(SIGUSR1, &oldact, NULL);
|
|
}
|
|
|
|
} else
|
|
ret = download(copt, opt);
|
|
|
|
if(optl(opt, "on-error-execute")) {
|
|
if(ret > 1)
|
|
system(getargl(opt, "on-error-execute"));
|
|
|
|
} else if((cpt = cfgopt(copt, "OnErrorExecute"))->enabled) {
|
|
if(ret > 1)
|
|
system(cpt->strarg);
|
|
}
|
|
if (pidfile) {
|
|
unlink(pidfile);
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
|
|
int download(const struct cfgstruct *copt, const struct optstruct *opt)
|
|
{
|
|
int ret = 0, try = 0, maxattempts = 0;
|
|
struct cfgstruct *cpt;
|
|
|
|
|
|
maxattempts = cfgopt(copt, "MaxAttempts")->numarg;
|
|
logg("*Max retries == %d\n", maxattempts);
|
|
|
|
if(!(cpt = cfgopt(copt, "DatabaseMirror"))->enabled) {
|
|
logg("^You must specify at least one database mirror.\n");
|
|
return 56;
|
|
} else {
|
|
|
|
while(cpt) {
|
|
ret = downloadmanager(copt, opt, cpt->strarg);
|
|
alarm(0);
|
|
|
|
if(ret == 52 || ret == 54 || ret == 58 || ret == 59) {
|
|
if(try < maxattempts - 1) {
|
|
logg("Trying again in 5 secs...\n");
|
|
try++;
|
|
sleep(5);
|
|
continue;
|
|
} else {
|
|
logg("Giving up on %s...\n", cpt->strarg);
|
|
cpt = (struct cfgstruct *) cpt->nextarg;
|
|
if(!cpt) {
|
|
logg("^Update failed. Your network may be down or none of the mirrors listed in freshclam.conf is working.\n");
|
|
}
|
|
try = 0;
|
|
}
|
|
|
|
} else {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void daemonize(void)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < 3; i++)
|
|
close(i);
|
|
|
|
umask(0);
|
|
|
|
if(fork())
|
|
exit(0);
|
|
|
|
setsid();
|
|
mprintf_disabled = 1;
|
|
}
|
|
|
|
void help(void)
|
|
{
|
|
mprintf_stdout = 1;
|
|
|
|
mprintf("\n");
|
|
mprintf(" Clam AntiVirus: freshclam "VERSION"\n");
|
|
mprintf(" (C) 2002 - 2005 ClamAV Team - http://www.clamav.net/team.html\n\n");
|
|
|
|
mprintf(" --help -h show help\n");
|
|
mprintf(" --version -V print version number and exit\n");
|
|
mprintf(" --verbose -v be verbose\n");
|
|
mprintf(" --debug enable debug messages\n");
|
|
mprintf(" --quiet only output error messages\n");
|
|
mprintf(" --stdout write to stdout instead of stderr\n");
|
|
mprintf("\n");
|
|
mprintf(" --config-file=FILE read configuration from FILE.\n");
|
|
mprintf(" --log=FILE -l FILE log into FILE\n");
|
|
mprintf(" --daemon -d run in daemon mode\n");
|
|
mprintf(" --pid=FILE -p FILE save daemon's pid in FILE\n");
|
|
mprintf(" --user=USER -u USER run as USER\n");
|
|
mprintf(" --no-dns force old non-DNS verification method\n");
|
|
mprintf(" --checks=#n -c #n number of checks per day, 1 <= n <= 50\n");
|
|
mprintf(" --datadir=DIRECTORY download new databases into DIRECTORY\n");
|
|
#ifdef BUILD_CLAMD
|
|
mprintf(" --daemon-notify[=/path/clamd.conf] send RELOAD command to clamd\n");
|
|
#endif
|
|
mprintf(" --local-address=IP -a IP bind to IP for HTTP downloads\n");
|
|
mprintf(" --on-update-execute=COMMAND execute COMMAND after successful update\n");
|
|
mprintf(" --on-error-execute=COMMAND execute COMMAND if errors occured\n");
|
|
mprintf(" --on-outdated-execute=COMMAND execute COMMAND when software is outdated\n");
|
|
|
|
mprintf("\n");
|
|
exit(0);
|
|
}
|
|
|