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530 lines
13 KiB
530 lines
13 KiB
/*
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* Copyright (C) 2002, 2003 Tomasz Kojm <zolw@konarski.edu.pl>
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* Damien Curtain <damien@pagefault.org>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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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 <pwd.h>
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#include <grp.h>
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#include "options.h"
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#include "shared.h"
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#include "others.h"
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#include "manager.h"
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#include "defaults.h"
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#include "freshclam.h"
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void freshclam(struct optstruct *opt)
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{
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int ret;
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#ifndef C_CYGWIN
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struct passwd *user;
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char *newdir;
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char *unpuser;
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if(optc(opt, 'u'))
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unpuser = getargc(opt, 'u');
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else
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unpuser = UNPUSER;
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/* freshclam shouldn't work with root priviledges */
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if(!getuid()) {
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if((user = getpwnam(unpuser)) == NULL) {
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mprintf("@Can't get information about user %s.\n", unpuser);
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exit(60); /* this is critical problem, so we just exit here */
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}
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setgroups(1, &user->pw_gid);
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setgid(user->pw_gid);
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setuid(user->pw_uid);
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}
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#endif
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/* initialize some important variables */
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mprintf_disabled = 0;
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if(optc(opt, 'v')) mprintf_verbose = 1;
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else mprintf_verbose = 0;
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if(optl(opt, "quiet")) mprintf_quiet = 1;
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else mprintf_quiet = 0;
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if(optl(opt, "stdout")) mprintf_stdout = 1;
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else mprintf_stdout = 0;
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if(optc(opt, 'V')) {
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mprintf("freshclam / ClamAV version "VERSION"\n");
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mexit(0);
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}
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if(optc(opt, 'h')) {
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free_opt(opt);
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help();
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}
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/* initialize logger */
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if(optl(opt, "log-verbose")) logverbose = 1;
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else logverbose = 0;
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if(optc(opt, 'l')) {
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logfile = getargc(opt, 'l');
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if(logg("--------------------------------------\n")) {
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mprintf("!Problem with internal logger.\n");
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mexit(1);
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}
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} else
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logfile = NULL;
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/* change current working directory */
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if(optl(opt, "datadir"))
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newdir = getargl(opt, "datadir");
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else
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newdir = VIRUSDBDIR;
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if(chdir(newdir)) {
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mprintf("Can't change dir to %s\n", newdir);
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exit(50);
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} else
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mprintf("Current working dir is %s\n", newdir);
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if(optc(opt, 'd')) {
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int bigsleep, checks;
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if(!optc(opt, 'c')) {
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mprintf("@Daemon mode requires -c (--checks) option.\n");
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mexit(40);
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}
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checks = atoi(getargc(opt, 'c'));
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if(checks <= 0 || checks > 50) {
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mprintf("@Wrong number of checks\n");
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mexit(41);
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}
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bigsleep = 24*3600 / checks;
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daemonize();
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while(1) {
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ret = download(opt);
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if(optl(opt, "on-error-execute"))
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if(ret > 1)
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system(getargl(opt, "on-error-execute"));
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logg("\n--------------------------------------\n");
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sleep(bigsleep);
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}
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} else
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ret = download(opt);
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if(optl(opt, "on-error-execute"))
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if(ret > 1)
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system(getargl(opt, "on-error-execute"));
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mexit(ret);
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}
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/*void free_mirror(mirrors* m)
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{
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mirrors *n;
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while(m)
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{
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n = m->next;
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if(m->mirror != NULL)
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free(m->mirror);
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free(m);
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m = n;
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}
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}*/
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int download(struct optstruct *opt)
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{
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int ret = 0;
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mirrors *m = NULL, *h = NULL;
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char *last = NULL;
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char *datadir, *mirror_last;
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int mirror_used = 0;
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/*
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* If the previous database update was not from the first host
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* listed in mirrors.txt it will have been saved to DBDIR/mirror.
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* In this case use this host one more time (if it is up) for
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* database updates then revert to the order in DBDIR/mirrors.txt
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*/
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last = parse_mirror(opt);
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if(last != NULL)
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{
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if((ret = downloadmanager(opt, last)) == 0)
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{
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mprintf("Database updated from last used mirror %s.\n", last);
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if(optl(opt, "datadir"))
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{
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datadir = getargl(opt, "datadir");
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}
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else
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{
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datadir = DATADIR;
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}
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if((mirror_last = malloc(sizeof(char) * (strlen(datadir) + strlen(MIRROR) + 1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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mexit(1);
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}
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strcpy(mirror_last, datadir);
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strcat(mirror_last, MIRROR);
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if(unlink(mirror_last) == -1)
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{
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fprintf(stderr, "ERROR: Can't unlink file %s !\n", mirror_last);
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}
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free(last);
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free(mirror_last);
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return ret;
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}
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/* Only continue if there is an error connecting to the host */
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if((ret != 52) && (ret != 54))
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{
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free(last);
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return ret;
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}
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free(last);
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}
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/*
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* There's an error in __nss_hostname_digits_dots () from /lib/libc.so.6
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* which gets triggered here for some reason.....
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* Calling fflush is a temp workaround
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*/
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fflush(NULL);
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h = m = parse_mirrorcfg(opt);
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while(m != NULL)
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{
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if((ret = downloadmanager(opt, m->mirror)) == 0)
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{
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if(mirror_used)
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{
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logg("Database updated from mirror %s.\n", m->mirror);
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mprintf("Database updated from mirror %s.\n", m->mirror);
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write_mirror(opt, m->mirror);
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}
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else
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{
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logg("Database updated from %s.\n", m->mirror);
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mprintf("Database updated from %s.\n", m->mirror);
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}
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FREE_MIRROR(h);
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return ret;
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}
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/* If we contacted a mirror then record the fact even if we
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* don't update any databases this run
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*/
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if(ret == 1)
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{
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if(mirror_used > 0)
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write_mirror(opt, m->mirror);
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FREE_MIRROR(h);
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return ret;
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}
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/* Only continue if there is an error connecting to the host */
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if((ret != 52) && (ret != 54))
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{
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FREE_MIRROR(h);
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return ret;
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}
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mirror_used++;
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m = m->next;
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}
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FREE_MIRROR(h);
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return ret;
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}
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void write_mirror(struct optstruct *opt, char * mirror)
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{
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char *datadir, *mirror_last;
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FILE *fd;
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if(optl(opt, "datadir"))
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{
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datadir = getargl(opt, "datadir");
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}
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else
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{
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datadir = DATADIR;
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}
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if((mirror_last = malloc(sizeof(char) * (strlen(datadir) + strlen(MIRROR) + 1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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mexit(1);
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}
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strcpy(mirror_last, datadir);
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strcat(mirror_last, MIRROR);
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if((fd = fopen(mirror_last, "w")) == NULL)
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{
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/* No mirror was used last time - this is normal */
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fprintf(stderr, "ERROR: Can't create file %s !\n", mirror_last);
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free(mirror_last);
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return;
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}
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if(!fputs(mirror, fd))
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{
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fprintf(stderr, "ERROR: Can't write to file %s !\n", mirror_last);
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}
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fclose(fd);
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free(mirror_last);
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return;
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}
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/*
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* If the previous database update was not from the first host
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* listed in mirrors.txt it will have been saved to DBDIR/mirror.
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* In this case use this host one more time (if it is up) for
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* database updates then revert to the order in DBDIR/mirrors.txt
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*/
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char * parse_mirror(struct optstruct *opt)
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{
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char *datadir = NULL, *mirror_last = NULL, *last = NULL;
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FILE *fd;
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char buf[BUFSIZ];
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if(optl(opt, "datadir"))
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{
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datadir = getargl(opt, "datadir");
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}
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else
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{
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datadir = DATADIR;
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}
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if((mirror_last = malloc(sizeof(char) * (strlen(datadir) + strlen(MIRROR) + 1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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mexit(1);
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}
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strcpy(mirror_last, datadir);
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strcat(mirror_last, MIRROR);
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if((fd = fopen(mirror_last, "r")) == NULL)
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{
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/* No mirror was used last time - this is normal */
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free(mirror_last);
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return NULL;
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}
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while(fgets(buf, BUFSIZ, fd))
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{
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if(buf[0] == '#')
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continue;
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if(strlen(buf) > 0)
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{
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if((last = malloc(sizeof(char) * (strlen(buf) +1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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free(mirror_last);
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return NULL;
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}
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chomp(buf);
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strcpy(last, buf);
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break;
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}
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}
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if(fclose(fd) != 0)
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{
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fprintf(stderr, "ERROR: Can't close fd !\n");
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}
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free(mirror_last);
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return last;
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}
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mirrors* parse_mirrorcfg(struct optstruct *opt)
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{
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mirrors *head = NULL, *curr = NULL, *prev = NULL;
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char *datadir = NULL, *mirrorcfg = NULL;
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FILE *fd = NULL;
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char buf[BUFSIZ];
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int hosts_found = 0;
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if(optl(opt, "datadir"))
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{
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datadir = getargl(opt, "datadir");
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}
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else
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{
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datadir = DATADIR;
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}
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if((mirrorcfg = malloc(sizeof(char) * (strlen(datadir) + strlen(MIRROR_CFG) + 1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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mexit(1);
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}
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strcpy(mirrorcfg, datadir);
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strcat(mirrorcfg, MIRROR_CFG);
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if((fd = fopen(mirrorcfg, "r")) == NULL)
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{
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fprintf(stderr, "ERROR: Can't open mirror configuration file %s !\n", mirrorcfg);
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free(mirrorcfg);
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mexit(1);
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}
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while(fgets(buf, BUFSIZ, fd))
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{
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if(buf[0] == '#')
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continue;
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if(strlen(buf) > 1)
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{
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if((curr = malloc(sizeof(struct _mirrors))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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free(mirrorcfg);
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FREE_MIRROR(head);
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return NULL;
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}
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curr->mirror = NULL;
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curr->next = NULL;
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if(head == NULL)
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head = curr;
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if(prev != NULL)
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prev->next = curr;
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if((curr->mirror = malloc(sizeof(char) * (strlen(buf) +1))) == NULL)
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{
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fprintf(stderr, "ERROR: Can't allocate sufficient memory\n");
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free(mirrorcfg);
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FREE_MIRROR(head);
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return NULL;
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}
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chomp(buf);
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strcpy(curr->mirror, buf);
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prev = curr;
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hosts_found++;
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}
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}
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if(fclose(fd) != 0)
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{
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fprintf(stderr, "ERROR: Can't close fd !\n");
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}
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if(hosts_found == 0)
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{
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fprintf(stderr, "ERROR: No hosts defined in %s !\n", mirrorcfg);
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FREE_MIRROR(head);
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free(mirrorcfg);
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mexit(1);
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}
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free(mirrorcfg);
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return head;
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}
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void daemonize(void)
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{
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int i;
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for(i = 0; i < 3; i++)
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close(i);
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umask(0);
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if(fork())
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exit(0);
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setsid();
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mprintf_disabled = 1;
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}
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void 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 "VERSION"\n");
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mprintf(" (c) 2002 Tomasz Kojm <zolw@konarski.edu.pl>\n");
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mprintf(" \n");
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mprintf(" --help -h show help\n");
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mprintf(" --version -V print version number and exit\n");
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mprintf(" --verbose -v be verbose\n");
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mprintf(" --quiet be quiet, output only error messages\n");
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mprintf(" --stdout write to stdout instead of stderr\n");
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mprintf(" (this help is always written to stdout)\n");
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mprintf("\n");
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mprintf(" --user=USER -u USER run as USER\n");
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mprintf(" --daemon -d run in daemon mode\n");
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mprintf(" --checks=#n -c #n #n checks by day, 1 <= n <= 50\n");
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mprintf(" --datadir=DIRECTORY download new database in DIRECTORY\n");
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mprintf(" --log=FILE -l FILE save download report in FILE\n");
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mprintf(" --log-verbose save additional informations\n");
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mprintf(" --http-proxy=hostname[:port] use proxy server hostname\n");
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mprintf(" --proxy-user=username:passwd use username/password for proxy auth\n");
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mprintf(" --daemon-notify[=/path/clamav.conf] send RELOAD command to clamd\n");
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mprintf(" --on-update-execute=[COMMAND] execute the COMMAND after successful update\n");
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mprintf(" --on-error-execute=[COMMAND] execute the COMMAND if errors occured\n");
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mprintf("\n");
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exit(0);
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}
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