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132 lines
3.8 KiB
132 lines
3.8 KiB
/*
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* Compilation: gcc -Wall ex1.c -o ex1 -lclamav
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*
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* Copyright (C) 2013-2025 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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* Author: 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 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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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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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#ifndef _WIN32
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#include <unistd.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 <clamav.h>
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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/*
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* Exit codes:
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* 0: clean
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* 1: infected
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* 2: error
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*/
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int main(int argc, char **argv)
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{
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int fd, ret;
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unsigned long int size = 0;
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unsigned int sigs = 0;
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long double mb;
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const char *virname;
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const char *filename;
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struct cl_engine *engine;
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struct cl_scan_options options;
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if (argc != 2) {
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printf("Usage: %s file\n", argv[0]);
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return 2;
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}
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filename = argv[1];
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/* Tip: Scan input should be opened as binary on Windows! */
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if ((fd = open(argv[1], O_RDONLY | O_BINARY)) == -1) {
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printf("Can't open file %s\n", argv[1]);
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return 2;
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}
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if ((ret = cl_init(CL_INIT_DEFAULT)) != CL_SUCCESS) {
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printf("Can't initialize libclamav: %s\n", cl_strerror(ret));
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return 2;
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}
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if (!(engine = cl_engine_new())) {
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printf("Can't create new engine\n");
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return 2;
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}
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/* Example version macro usage to determine if new feature is available */
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#if defined(LIBCLAMAV_VERSION_NUM) && (LIBCLAMAV_VERSION_NUM >= 0x090400)
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/* Example feature usage lowering max scan time to 15 seconds. */
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cl_engine_set_num(engine, CL_ENGINE_MAX_SCANTIME, 15000);
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#endif
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/* load all available databases from default directory */
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if ((ret = cl_load(cl_retdbdir(), engine, &sigs, CL_DB_STDOPT)) != CL_SUCCESS) {
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printf("cl_load: %s\n", cl_strerror(ret));
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close(fd);
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cl_engine_free(engine);
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return 2;
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}
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printf("Loaded %u signatures.\n", sigs);
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/* build engine */
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if ((ret = cl_engine_compile(engine)) != CL_SUCCESS) {
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printf("Database initialization error: %s\n", cl_strerror(ret));
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cl_engine_free(engine);
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close(fd);
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return 2;
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}
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/* scan file descriptor */
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memset(&options, 0, sizeof(struct cl_scan_options));
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options.parse |= ~0; /* enable all parsers */
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options.general |= CL_SCAN_GENERAL_HEURISTICS; /* enable heuristic alert options */
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if ((ret = cl_scandesc(fd, filename, &virname, &size, engine, &options)) == CL_VIRUS) {
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printf("Virus detected: %s\n", virname);
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} else {
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if (ret == CL_CLEAN) {
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printf("No virus detected.\n");
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} else {
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printf("Error: %s\n", cl_strerror(ret));
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cl_engine_free(engine);
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close(fd);
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return 2;
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}
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}
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close(fd);
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/* free memory */
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cl_engine_free(engine);
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/* calculate size of scanned data */
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mb = size * (CL_COUNT_PRECISION / 1024) / 1024.0;
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printf("Data scanned: %2.2Lf MB\n", mb);
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return ret == CL_VIRUS ? 1 : 0;
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}
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