clamscan - scan files and directories against viruses
clamscan [options] [file/directory/-]
clamscan is a command line anti-virus scanner. Its a part of the Clam AntiVirus package.
-h, --help Print help information and exit. -V, --version Print version number and exit. -v, --verbose Be verbose. --debug Enable debug messages (from libclamav). --quiet Be quiet (only print error messages). --stdout Write all messages (except for libclamav output) to the standard output (stdout). -d FILE/DIR, --database=FILE/DIR Load virus database from FILE or load all virus database files from DIR. -l FILE, --log=FILE Save scan report to FILE. --tempdir=DIRECTORY Create temporary files in DIRECTORY. Directory must be writable for the clamav user or unprivileged user running clamscan. --leave-temps Do not remove temporary files. -r, --recursive Scan directories recursively. All the subdirectories in the given directory will be scanned. --bell Sound bell on virus detection. --no-summary Do not display summary at the end of scanning. --exclude=PATT, --exclude-dir=PATT Dont scan file/directory names containing PATT. It may be used multiple times. --include=PATT, --include-dir=PATT Only scan file/directory names containing PATT. It may be used multiple times. -i, --infected Only print infected files. --remove Remove infected files. Be careful. --move=DIRECTORY Move infected files into DIRECTORY. Directory must be writable for the clamav user or unprivileged user running clamscan. --no-mail Disable scanning of mail files. --no-pe PE stands for Portable Executable - its an executable file format used in all 32-bit versions of Windows operating systems. By default ClamAV performs deeper analysis of executable files and attempts to decompress popular executable packers such as UPX, Petite, and FSG. This option disables PE support and should be used with care! --no-ole2 Disable support for Microsoft Office document files. --no-html Disable support for HTML detection and normalisation. --no-archive Disable archive support built in libclamav. --detect-broken Mark broken executables as viruses (Broken.Executable). --block-encrypted Mark encrypted archives as viruses (Encrypted.Zip, Encrypted.RAR). --block-max Mark archives as viruses (e.g. RAR.ExceededFileSize, Zip.ExceededFilesLimit) if max-files, max-space, or max-recursion is reached. --mail-follow-urls If an email contains URLs ClamAV can download and scan them. WARNING: This option may open your system to a DoS attack. Never use it on loaded servers. --max-files=#n Extract first #n files from each archive. This option protects your system against DoS attacks (default: 500) --max-space=#n Extract first #n kilobytes from each archive. You may give the number in megabytes in format xM or xm, where x is a number. This option protects your system against DoS attacks (default: 10 MB) --max-recursion=#n Set archive recursion level limit. This option protects your system against DoS attacks (default: 8). --max-ratio=#n Set maximum archive compression ratio limit. This option protects your system against DoS attacks (default: 250). --max-dir-recursion=#n Maximum depth directories are scanned at (default: 15). --unzip[=FULLPATH] In most cases you dont need this option - the built-in unarchiver will do extract Zip archives. This option however may be used as a backup for internal unpacker - see the full documentation for more information. When enabled without an argument, unzip program will be searched in $PATH. If unzip cannot be found in $PATH, you must force it with =pathname. Remember about = between the option and an argument. --unrar[=FULLPATH] Scan .rar files. --arj[=FULLPATH] Scan .arj files. --unzoo[=FULLPATH] Scan .zoo files. --lha[=FULLPATH] Scan .lzh files. --jar[=FULLPATH] clamscan uses unzip for .jar files, so optionally eventually you will need to pass a full path to unzip. --deb[=FULLPATH] This option supports debian binary packages. Implies --tgz, but doesnt conflict with --tgz=FULLPATH. It requires ar utility. --tar[=FULLPATH] This option supports non-compressed archives. --tgz[=FULLPATH] This option supports tar.gz and .tgz files. You need GNU tar, on non-Linux system you probably have it installed as gtar. If its in $PATH, please use --tgz=gtar in other case please pass a full path.
(0) Scan selected file: clamscan file
(1) Scan current working directory: clamscan
(2) Scan all files (and subdirectories) in /home: clamscan -r /home
(3) Load database from selected file and limit disk usage to 50 Mb: clamscan -d /tmp/newclamdb --max-space=50m -r /tmp
(4) Scan data stream: cat testfile | clamscan -
(5) Scan mail spool directory: clamscan -r /var/spool/mail
Note: some return codes may only appear in a one file mode (clamscan is started with file argument). Those are marked with (ofm).
0 : No virus found.
1 : Virus(es) found.
40: Unknown option passed.
50: Database initialization error.
52: Not supported file type.
53: Cant open directory.
54: Cant open file. (ofm)
55: Error reading file. (ofm)
56: Cant stat input file / directory.
57: Cant get absolute path name of current working directory.
58: I/O error, please check your file system.
59: Cant get information about current user from /etc/passwd.
60: Cant get information about user clamav (default name) from /etc/passwd.
61: Cant fork.
62: Cant initialize logger.
63: Cant create temporary files/directories (check permissions).
64: Cant write to temporary directory (please specify another one).
70: Cant allocate and clear memory (calloc).
71: Cant allocate memory (malloc).
Please check the full documentation for credits.
Tomasz Kojm <tkojm@clamav.net>
clamdscan(1), freshclam(1)
Tomasz Kojm | clamscan (1) | May 11, 2005 |