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deb-mbse/mbfido/virscan.c

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/*****************************************************************************
*
* $Id$
* Purpose ...............: Scan for virusses
*
*****************************************************************************
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* Copyright (C) 1997-2007
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*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS 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, or (at your option) any
* later version.
*
* MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "../lib/mbselib.h"
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#include "virscan.h"
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extern pid_t mypid;
/*
* Check for known viri, optional in a defined path.
*/
int VirScan(char *path)
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{
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char *pwd, *temp, *stdlog, *errlog, buf[256];
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FILE *fp, *lp;
int vrc, rc = FALSE, has_scan = FALSE;
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temp = calloc(PATH_MAX, sizeof(char));
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stdlog = calloc(PATH_MAX, sizeof(char));
errlog = calloc(PATH_MAX, sizeof(char));
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snprintf(temp, PATH_MAX, "%s/etc/virscan.data", getenv("MBSE_ROOT"));
snprintf(stdlog, PATH_MAX, "%s/tmp/stdlog%d", getenv("MBSE_ROOT"), mypid);
snprintf(errlog, PATH_MAX, "%s/tmp/errlog%d", getenv("MBSE_ROOT"), mypid);
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if ((fp = fopen(temp, "r")) == NULL) {
WriteError("No virus scanners defined");
free(temp);
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free(stdlog);
free(errlog);
return FALSE;
}
fread(&virscanhdr, sizeof(virscanhdr), 1, fp);
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while (fread(&virscan, virscanhdr.recsize, 1, fp) == 1) {
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if (virscan.available) {
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if (file_exist(virscan.scanner, X_OK) == 0) {
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has_scan = TRUE;
} else {
Syslog('+', "Warning: virusscanner %s marked active but not present", virscan.comment);
}
}
}
if (!has_scan) {
Syslog('+', "No active virus scanners, skipping scan");
fclose(fp);
free(temp);
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free(stdlog);
free(errlog);
return FALSE;
}
pwd = calloc(PATH_MAX, sizeof(char));
getcwd(pwd, PATH_MAX);
if (path) {
chdir(path);
Syslog('+', "Start virusscan in %s", path);
} else {
Syslog('+', "Start virusscan in %s", pwd);
}
fseek(fp, virscanhdr.hdrsize, SEEK_SET);
while (fread(&virscan, virscanhdr.recsize, 1, fp) == 1) {
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if (virscan.available && (file_exist(virscan.scanner, X_OK) ==0)) {
Altime(3600);
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vrc = execute_str(virscan.scanner, virscan.options, (char *)NULL, (char *)"/dev/null", stdlog, errlog);
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if (file_size(stdlog)) {
if ((lp = fopen(stdlog, "r"))) {
while (fgets(buf, sizeof(buf) -1, lp)) {
Striplf(buf);
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Syslog('+', "stdout: \"%s\"", printable(buf, 0));
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}
fclose(lp);
}
}
if (file_size(errlog)) {
if ((lp = fopen(errlog, "r"))) {
while (fgets(buf, sizeof(buf) -1, lp)) {
Striplf(buf);
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Syslog('+', "stderr: \"%s\"", printable(buf, 0));
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}
fclose(lp);
}
}
unlink(stdlog);
unlink(errlog);
if (vrc != virscan.error) {
Syslog('!', "Virus found by %s", virscan.comment);
rc = TRUE;
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}
Altime(0);
Nopper();
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}
}
fclose(fp);
if (path)
chdir(pwd);
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free(pwd);
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free(temp);
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free(stdlog);
free(errlog);
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return rc;
}