bsdtar(1) - manipulate tape archives
-B, --read-full-blocks
        Ignored for compatibility with other tar(1) implementations.
-b blocksize, --block-size blocksize
        Specify the block size, in 512-byte records, for tape drive I/O.  As a rule, this argument is only
        needed when reading from or writing to tape drives, and usually not even then as the default block
        size of 20 records (10240 bytes) is very common.
-C directory, --cd directory, --directory directory
        In c and r mode, this changes the directory before adding the following files.  In x mode, change
        directories after opening the archive but before extracting entries from the archive.
--chroot
        (x mode only) chroot() to the current directory after processing any -C options and before
        extracting any files.
--disable-copyfile
        Mac OS X specific.  Disable the use of copyfile(3).
--exclude pattern
        Do not process files or directories that match the specified pattern.  Note that exclusions take
        precedence over patterns or filenames specified on the command line.
--format format
        (c, r, u mode only) Use the specified format for the created archive.  Supported formats include
        “cpio”, “pax”, “shar”, and “ustar”.  Other formats may also be supported; see libarchive-formats(5)
        for more information about currently-supported formats.  In r and u modes, when extending an
        existing archive, the format specified here must be compatible with the format of the existing
        archive on disk.
-f file, --file file
        Read the archive from or write the archive to the specified file.  The filename can be - for
        standard input or standard output.  The default varies by system; on FreeBSD, the default is
        /dev/sa0; on Linux, the default is /dev/st0.
--gid id
        Use the provided group id number.  On extract, this overrides the group id in the archive; the
        group name in the archive will be ignored.  On create, this overrides the group id read from disk;
        if --gname is not also specified, the group name will be set to match the group id.
--gname name
        Use the provided group name.  On extract, this overrides the group name in the archive; if the
        provided group name does not exist on the system, the group id (from the archive or from the --gid
        option) will be used instead.  On create, this sets the group name that will be stored in the
        archive; the name will not be verified against the system group database.
-H      (c and r mode only) Symbolic links named on the command line will be followed; the target of the
        link will be archived, not the link itself.
-h      (c and r mode only) Synonym for -L.

-I      Synonym for -T.
--help  Show usage.
--include pattern
        Process only files or directories that match the specified pattern.  Note that exclusions specified
        with --exclude take precedence over inclusions.  If no inclusions are explicitly specified, all
        entries are processed by default.  The --include option is especially useful when filtering
        archives.  For example, the command
              tar -c -f new.tar --include='*foo*' @old.tgz
        creates a new archive new.tar containing only the entries from old.tgz containing the string ‘foo’.
-J, --xz
        (c mode only) Compress the resulting archive with xz(1).  In extract or list modes, this option is
        ignored.  Note that, unlike other tar implementations, this implementation recognizes XZ
        compression automatically when reading archives.
-j, --bzip, --bzip2, --bunzip2
        (c mode only) Compress the resulting archive with bzip2(1).  In extract or list modes, this option
        is ignored.  Note that, unlike other tar implementations, this implementation recognizes bzip2
        compression automatically when reading archives.
-k, --keep-old-files
        (x mode only) Do not overwrite existing files.  In particular, if a file appears more than once in
        an archive, later copies will not overwrite earlier copies.
--keep-newer-files
        (x mode only) Do not overwrite existing files that are newer than the versions appearing in the
        archive being extracted.
-L, --dereference
        (c and r mode only) All symbolic links will be followed.  Normally, symbolic links are archived as
        such.  With this option, the target of the link will be archived instead.
-l, --check-links
        (c and r modes only) Issue a warning message unless all links to each file are archived.
--lzma  (c mode only) Compress the resulting archive with the original LZMA algorithm.  Use of this option
        is discouraged and new archives should be created with --xz instead.  Note that, unlike other tar
        implementations, this implementation recognizes LZMA compression automatically when reading
        archives.
-m, --modification-time
        (x mode only) Do not extract modification time.  By default, the modification time is set to the
        time stored in the archive.
-n, --norecurse, --no-recursion
        (c, r, u modes only) Do not recursively archive the contents of directories.
--newer date
        (c, r, u modes only) Only include files and directories newer than the specified date.  This
        compares ctime entries.
--newer-mtime date
        (c, r, u modes only) Like --newer, except it compares mtime entries instead of ctime entries.
--newer-than file
        (c, r, u modes only) Only include files and directories newer than the specified file.  This
        compares ctime entries.
--newer-mtime-than file
        (c, r, u modes only) Like --newer-than, except it compares mtime entries instead of ctime entries.
--nodump
        (c and r modes only) Honor the nodump file flag by skipping this file.
--null  (use with -I or -T) Filenames or patterns are separated by null characters, not by newlines.  This
        is often used to read filenames output by the -print0 option to find(1).
--no-same-owner
        (x mode only) Do not extract owner and group IDs.  This is the reverse of --same-owner and the
        default behavior if tar is run as non-root.
--no-same-permissions
        (x mode only) Do not extract full permissions (SGID, SUID, sticky bit, ACLs, extended attributes or
        extended file flags).  This is the reverse of -p and the default behavior if tar is run as non-
        root.
--numeric-owner
        This is equivalent to --uname "" --gname "".  On extract, it causes user and group names in the
        archive to be ignored in favor of the numeric user and group ids.  On create, it causes user and
        group names to not be stored in the archive.
-O, --to-stdout
        (x, t modes only) In extract (-x) mode, files will be written to standard out rather than being
        extracted to disk.  In list (-t) mode, the file listing will be written to stderr rather than the
        usual stdout.
-o      (x mode) Use the user and group of the user running the program rather than those specified in the
        archive.  Note that this has no significance unless -p is specified, and the program is being run
        by the root user.  In this case, the file modes and flags from the archive will be restored, but
        ACLs or owner information in the archive will be discarded.
-o      (c, r, u mode) A synonym for --format ustar
--one-file-system
        (c, r, and u modes) Do not cross mount points.
--options options
        Select optional behaviors for particular modules.  The argument is a text string containing comma-
        separated keywords and values.  These are passed to the modules that handle particular formats to
        control how those formats will behave.  Each option has one of the following forms:
        key=value
                The key will be set to the specified value in every module that supports it.  Modules that
                do not support this key will ignore it.
        key     The key will be enabled in every module that supports it.  This is equivalent to key=1.
        !key    The key will be disabled in every module that supports it.
        module:key=value, module:key, module:!key
                As above, but the corresponding key and value will be provided only to modules whose name
                matches module.
        The currently supported modules and keys are:
        iso9660:joliet
                Support Joliet extensions.  This is enabled by default, use !joliet or iso9660:!joliet to
                disable.
        iso9660:rockridge
                Support Rock Ridge extensions.  This is enabled by default, use !rockridge or
                iso9660:!rockridge to disable.
        gzip:compression-level
                A decimal integer from 0 to 9 specifying the gzip compression level.
        xz:compression-level
                A decimal integer from 0 to 9 specifying the xz compression level.
        mtree:keyword
                The mtree writer module allows you to specify which mtree keywords will be included in the
                output.  Supported keywords include: cksum, device, flags, gid, gname, indent, link, md5,
                mode, nlink, rmd160, sha1, sha256, sha384, sha512, size, time, uid, uname.  The default is
                equivalent to: “device, flags, gid, gname, link, mode, nlink, size, time, type, uid,
                uname”.
        mtree:all
                Enables all of the above keywords.  You can also use mtree:!all to disable all keywords.
        mtree:use-set
                Enable generation of /set lines in the output.
        mtree:indent
                Produce human-readable output by indenting options and splitting lines to fit into 80
                columns.
        zip:compression=type
                Use type as compression method.  Supported values are store (uncompressed) and deflate
                (gzip algorithm).
        If a provided option is not supported by any module, that is a fatal error.
-P, --absolute-paths
        Preserve pathnames.  By default, absolute pathnames (those that begin with a / character) have the
        leading slash removed both when creating archives and extracting from them.  Also, tar will refuse
        to extract archive entries whose pathnames contain .. or whose target directory would be altered by
        a symlink.  This option suppresses these behaviors.
-p, --insecure, --preserve-permissions
        (x mode only) Preserve file permissions.  Attempt to restore the full permissions, including owner,
        file modes, file flags and ACLs, if available, for each item extracted from the archive.  This is
        the default, if tar is being run by root and can be overridden by also specifying --no-same-owner
        and --no-same-permissions.
--posix
        (c, r, u mode only) Synonym for --format pax
-q, --fast-read
        (x and t mode only) Extract or list only the first archive entry that matches each pattern or
        filename operand.  Exit as soon as each specified pattern or filename has been matched.  By
        default, the archive is always read to the very end, since there can be multiple entries with the
        same name and, by convention, later entries overwrite earlier entries.  This option is provided as
        a performance optimization.
-S      (x mode only) Extract files as sparse files.  For every block on disk, check first if it contains
        only NULL bytes and seek over it otherwise.  This works similar to the conv=sparse option of dd.
-s pattern
        Modify file or archive member names according to pattern.  The pattern has the format
        /old/new/[ghHprRsS] where old is a basic regular expression, new is the replacement string of the
        matched part, and the optional trailing letters modify how the replacement is handled.  If old is
        not matched, the pattern is skipped.  Within new, ~ is substituted with the match, \1 to \9 with
        the content of the corresponding captured group.  The optional trailing g specifies that matching
        should continue after the matched part and stop on the first unmatched pattern.  The optional
        trailing s specifies that the pattern applies to the value of symbolic links.  The optional
        trailing p specifies that after a successful substitution the original path name and the new path
        name should be printed to standard error.  Optional trailing H, R, or S characters suppress
        substitutions for hardlink targets, regular filenames, or symlink targets, respectively.  Optional
        trailing h, r, or s characters enable substitutions for hardlink targets, regular filenames, or
        symlink targets, respectively.  The default is hrs which applies substitutions to all names.  In
        particular, it is never necessary to specify h, r, or s.
--same-owner
        (x mode only) Extract owner and group IDs.  This is the reverse of --no-same-owner and the default
        behavior if tar is run as root.
--strip-components count
        Remove the specified number of leading path elements.  Pathnames with fewer elements will be
        silently skipped.  Note that the pathname is edited after checking inclusion/exclusion patterns but
        before security checks.
-T filename, --files-from filename
        In x or t mode, tar will read the list of names to be extracted from filename.  In c mode, tar will
        read names to be archived from filename.  The special name “-C” on a line by itself will cause the
        current directory to be changed to the directory specified on the following line.  Names are
        terminated by newlines unless --null is specified.  Note that --null also disables the special
        handling of lines containing “-C”.
--totals
        (c, r, u mode only) After archiving all files, print a summary to stderr.
-U, --unlink, --unlink-first
        (x mode only) Unlink files before creating them.  This can be a minor performance optimization if
        most files already exist, but can make things slower if most files do not already exist.  This flag
        also causes tar to remove intervening directory symlinks instead of reporting an error.  See the
        SECURITY section below for more details.
--uid id
        Use the provided user id number and ignore the user name from the archive.  On create, if --uname
        is not also specified, the user name will be set to match the user id.
--uname name
        Use the provided user name.  On extract, this overrides the user name in the archive; if the
        provided user name does not exist on the system, it will be ignored and the user id (from the
        archive or from the --uid option) will be used instead.  On create, this sets the user name that
        will be stored in the archive; the name is not verified against the system user database.
--use-compress-program program
        Pipe the input (in x or t mode) or the output (in c mode) through program instead of using the
        builtin compression support.
-v, --verbose
        Produce verbose output.  In create and extract modes, tar will list each file name as it is read
        from or written to the archive.  In list mode, tar will produce output similar to that of ls(1).
        Additional -v options will provide additional detail.
--version
        Print version of tar and libarchive, and exit.
-w, --confirmation, --interactive
        Ask for confirmation for every action.
-X filename, --exclude-from filename
        Read a list of exclusion patterns from the specified file.  See --exclude for more information
        about the handling of exclusions.
-y      (c mode only) Compress the resulting archive with bzip2(1).  In extract or list modes, this option
        is ignored.  Note that, unlike other tar implementations, this implementation recognizes bzip2
        compression automatically when reading archives.
-Z, --compress, --uncompress
        (c mode only) Compress the resulting archive with compress(1).  In extract or list modes, this
        option is ignored.  Note that, unlike other tar implementations, this implementation recognizes
        compress compression automatically when reading archives.
-z, --gunzip, --gzip
        (c mode only) Compress the resulting archive with gzip(1).  In extract or list modes, this option
        is ignored.  Note that, unlike other tar implementations, this implementation recognizes gzip
        compression automatically when reading archives.