/*
* Copyright (C) 2002, 2003 Tomasz Kojm <zolw@konarski.edu.pl>
* Damien Curtain <damien@pagefault.org>
*
* 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.
*/
/* TODO: Handle SIGALRM more gently */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include "options.h"
#include "shared.h"
#include "others.h"
#include "manager.h"
#include "defaults.h"
#include "freshclam.h"
#define TIMEOUT 1200
void freshclam(struct optstruct *opt)
{
int ret;
#ifndef C_CYGWIN
struct passwd *user;
char *newdir;
char *unpuser;
if(optc(opt, 'u'))
unpuser = getargc(opt, 'u');
else
unpuser = UNPUSER;
/* freshclam shouldn't work with root priviledges */
if(!getuid()) {
if((user = getpwnam(unpuser)) == NULL) {
mprintf("@Can't get information about user %s.\n", unpuser);
exit(60); /* this is critical problem, so we just exit here */
}
setgroups(1, &user->pw_gid);
setgid(user->pw_gid);
setuid(user->pw_uid);
}
#endif
/* initialize some important variables */
if(optl(opt, "debug"))
cl_debug();
mprintf_disabled = 0;
if(optc(opt, 'v')) mprintf_verbose = 1;
else mprintf_verbose = 0;
if(optl(opt, "quiet")) mprintf_quiet = 1;
else mprintf_quiet = 0;
if(optl(opt, "stdout")) mprintf_stdout = 1;
else mprintf_stdout = 0;
if(optc(opt, 'V')) {
mprintf("freshclam / ClamAV version "VERSION"\n");
mexit(0);
}
if(optc(opt, 'h')) {
free_opt(opt);
help();
}
/* initialize logger */
if(optl(opt, "log-verbose")) logverbose = 1;
else logverbose = 0;
if(optc(opt, 'l')) {
logfile = getargc(opt, 'l');
if(logg("--------------------------------------\n")) {
mprintf("!Problem with internal logger.\n");
mexit(1);
}
} else
logfile = NULL;
/* change current working directory */
if(optl(opt, "datadir"))
newdir = getargl(opt, "datadir");
else
newdir = VIRUSDBDIR;
if(chdir(newdir)) {
mprintf("Can't change dir to %s\n", newdir);
exit(50);
} else
mprintf("*Current working dir is %s\n", newdir);
if(optc(opt, 'd')) {
int bigsleep, checks;
if(!optc(opt, 'c')) {
mprintf("@Daemon mode requires -c (--checks) option.\n");
mexit(40);
}
checks = atoi(getargc(opt, 'c'));
if(checks <= 0 || checks > 50) {
mprintf("@Wrong number of checks\n");
mexit(41);
}
bigsleep = 24*3600 / checks;
daemonize();
while(1) {
ret = download(opt);
if(optl(opt, "on-error-execute"))
if(ret > 1)
system(getargl(opt, "on-error-execute"));
logg("\n--------------------------------------\n");
sleep(bigsleep);
}
} else
ret = download(opt);
if(optl(opt, "on-error-execute"))
if(ret > 1)
system(getargl(opt, "on-error-execute"));
mexit(ret);
}
void d_timeout(int sig)
{
mprintf("@Maximal time (%d seconds) reached.\n", TIMEOUT);
exit(1);
}
int download(struct optstruct *opt)
{
int ret = 0;
mirrors *m = NULL, *h = NULL;
int mirror_used = 0;
struct sigaction sigalrm;
sigalrm.sa_handler = d_timeout;
sigaction(SIGALRM, &sigalrm, NULL);
/*
* There's an error in __nss_hostname_digits_dots () from /lib/libc.so.6
* which gets triggered here for some reason.....
* Calling fflush is a temp workaround
*/
fflush(NULL);
h = m = parse_mirrorcfg(opt);
while(m != NULL)
{
alarm(TIMEOUT);
ret = downloadmanager(opt, m->mirror);
alarm(0);
if(ret == 0)
{
if(mirror_used)
{
logg("Database updated from mirror %s.\n", m->mirror);
mprintf("Database updated from mirror %s.\n", m->mirror);
}
FREE_MIRROR(h);
return ret;
}
/* Only continue if there is an error connecting to the host */
if((ret != 52) && (ret != 54))
{
FREE_MIRROR(h);
return ret;
}
mprintf("Waiting 10 seconds...\n");
sleep(10);
mirror_used++;
m = m->next;
}
FREE_MIRROR(h);
return ret;
}
mirrors* parse_mirrorcfg(struct optstruct *opt)
{
mirrors *head = NULL, *curr = NULL, *prev = NULL;
char *datadir = NULL, *mirrorcfg = NULL;
FILE *fd = NULL;
char buf[BUFSIZ];
int hosts_found = 0;
if(optl(opt, "datadir"))
{
datadir = getargl(opt, "datadir");
}
else
{
datadir = DATADIR;
}
if((mirrorcfg = malloc(sizeof(char) * (strlen(datadir) + strlen(MIRROR_CFG) + 1))) == NULL)
{
fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
mexit(1);
}
strcpy(mirrorcfg, datadir);
strcat(mirrorcfg, MIRROR_CFG);
if((fd = fopen(mirrorcfg, "r")) == NULL)
{
fprintf(stderr, "ERROR: Can't open mirror configuration file %s !\n", mirrorcfg);
free(mirrorcfg);
mexit(1);
}
while(fgets(buf, BUFSIZ, fd))
{
if(buf[0] == '#')
continue;
if(strlen(buf) > 1)
{
if((curr = malloc(sizeof(struct _mirrors))) == NULL)
{
fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
free(mirrorcfg);
FREE_MIRROR(head);
return NULL;
}
curr->mirror = NULL;
curr->next = NULL;
if(head == NULL)
head = curr;
if(prev != NULL)
prev->next = curr;
if((curr->mirror = malloc(sizeof(char) * (strlen(buf) +1))) == NULL)
{
fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
free(mirrorcfg);
FREE_MIRROR(head);
return NULL;
}
chomp(buf);
strcpy(curr->mirror, buf);
prev = curr;
hosts_found++;
}
}
if(fclose(fd) != 0)
{
fprintf(stderr, "ERROR: Can't close fd !\n");
}
if(hosts_found == 0)
{
fprintf(stderr, "ERROR: No hosts defined in %s !\n", mirrorcfg);
FREE_MIRROR(head);
free(mirrorcfg);
mexit(1);
}
free(mirrorcfg);
return head;
}
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, 2003 Tomasz Kojm <zolw@konarski.edu.pl>\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 be quiet, output only error messages\n");
mprintf(" --stdout write to stdout instead of stderr\n");
mprintf(" (this help is always written to stdout)\n");
mprintf("\n");
mprintf(" --user=USER -u USER run as USER\n");
mprintf(" --daemon -d run in daemon mode\n");
mprintf(" --checks=#n -c #n #n checks by day, 1 <= n <= 50\n");
mprintf(" --datadir=DIRECTORY download new database in DIRECTORY\n");
mprintf(" --log=FILE -l FILE save download report in FILE\n");
mprintf(" --log-verbose save additional informations\n");
mprintf(" --http-proxy=hostname[:port] use proxy server hostname\n");
mprintf(" --proxy-user=username:passwd use username/password for proxy auth\n");
#ifdef BUILD_CLAMD
mprintf(" --daemon-notify[=/path/clamav.conf] send RELOAD command to clamd\n");
#endif
mprintf(" --on-update-execute=COMMAND execute COMMAND after successful update\n");
mprintf(" --on-error-execute=COMMAND execute COMMAND if errors occured\n");
mprintf("\n");
exit(0);
}