Provided by: libarchive-dev_3.0.3-6ubuntu1_i386 bug

NAME

     archive_write_set_filter_option, archive_write_set_format_option,
     archive_write_set_option, archive_write_set_options -- functions
     controlling options for reading archives

SYNOPSIS

SYNOPSIS

     int
     archive_write_set_filter_option(struct archive *, const char *module,
         const char *option, const char *value);

     int
     archive_write_set_format_option(struct archive *, const char *module,
         const char *option, const char *value);

     int
     archive_write_set_option(struct archive *, const char *module,
         const char *option, const char *value);

     int
     archive_write_set_options(struct archive *, const char *options);

DESCRIPTION

     These functions provide a way for libarchive clients to configure
     specific write modules.

     archive_write_set_filter_option(), archive_write_set_format_option()
             Specifies an option that will be passed to currently-registered
             filters (including decompression filters) or format readers.

             If option and value are both NULL, these functions will do
             nothing and ARCHIVE_OK will be returned.  If option is NULL but
             value is not, these functions will do nothing and ARCHIVE_FAILED
             will be returned.

             If module is not NULL, option and value will be provided to the
             filter or reader named module.  The return value will be that of
             the module.  If there is no such module, ARCHIVE_FAILED will be
             returned.

             If module is NULL, option and value will be provided to every
             registered module.  If any module returns ARCHIVE_FATAL, this
             value will be returned immediately.  Otherwise, ARCHIVE_OK will
             be returned if any module accepts the option, and ARCHIVE_FAILED
             in all other cases.

     archive_write_set_option()
             Calls archive_write_set_format_option(), then
             archive_write_set_filter_option().  If either function returns
             ARCHIVE_FATAL, ARCHIVE_FATAL will be returned immediately.
             Otherwise, greater of the two values will be returned.

     archive_write_set_options()
             options is a comma-separated list of options.  If options is NULL
             or empty, ARCHIVE_OK will be returned immediately.

             Individual options have one of the following forms:
             option=value
                     The option/value pair will be provided to every module.
                     Modules that do not accept an option with this name will
                     ignore it.
             option  The option will be provided to every module with a value
                     of ``1''.
             !option
                     The option will be provided to every module with a NULL
                     value.
             module:option=value, module:option, module:!option
                     As above, but the corresponding option and value will be
                     provided only to modules whose name matches module.

OPTIONS

     Filter gzip
             compression-level
                     The value is interpreted as a decimal integer specifying
                     the gzip compression level.
     Filter xz
             compression-level
                     The value is interpreted as a decimal integer specifying
                     the compression level.
     Format mtree
             cksum, device, flags, gid, gname, indent, link, md5, mode, nlink,
                     rmd160, sha1, sha256, sha384, sha512, size, time, uid,
                     uname
                     Enable a particular keyword in the mtree output.  Prefix
                     with an exclamation mark to disable the corresponding
                     keyword.  The default is equivalent to ``device, flags,
                     gid, gname, link, mode, nlink, size, time, type, uid,
                     uname''.
             all     Enables all of the above keywords.
             use-set
                     Enables generation of /set lines that specify default
                     values for the following files and/or directories.
             indent  XXX needs explanation XXX
     Format iso9660 - volume metadata
             These options are used to set standard ISO9660 metadata.
             abstract-file=filename
                     The file with the specified name will be identified in
                     the ISO9660 metadata as holding the abstract for this
                     volume.  Default: none.
             application-id=filename
                     The file with the specified name will be identified in
                     the ISO9660 metadata as holding the application
                     identifier for this volume.  Default: none.
             biblio-file=filename
                     The file with the specified name will be identified in
                     the ISO9660 metadata as holding the bibliography for this
                     volume.  Default: none.
             copyright-file=filename
                     The file with the specified name will be identified in
                     the ISO9660 metadata as holding the copyright for this
                     volume.  Default: none.
             publisher=filename
                     The file with the specified name will be identified in
                     the ISO9660 metadata as holding the publisher information
                     for this volume.  Default: none.
             volume-id=string
                     The specified string will be used as the Volume
                     Identifier in the ISO9660 metadata.  It is limited to 32
                     bytes. Default: none.
     Format iso9660 - boot support
             These options are used to make an ISO9660 image that can be
             directly booted on various systems.
             boot=filename
                     The file matching this name will be used as the El Torito
                     boot image file.
             boot-catalog=name
                     The name that will be used for the El Torito boot
                     catalog.  Default: boot.catalog
             boot-info-table
                     The boot image file provided by the boot=filename option
                     will be edited with appropriate boot information in bytes
                     8 through 64.  Default: disabled
             boot-load-seg=hexadecimal-number
                     The load segment for a no-emulation boot image.
             boot-load-size=decimal-number
                     The number of "virtual" 512-byte sectors to be loaded
                     from a no-emulation boot image.  Some very old BIOSes can
                     only load very small images, setting this value to 4 will
                     often allow such BIOSes to load the first part of the
                     boot image (which will then need to be intelligent enough
                     to load the rest of itself).  This should not be needed
                     unless you are trying to support systems with very old
                     BIOSes.  This defaults to the full size of the image.
             boot-type=value
                     Specifies the boot semantics used by the El Torito boot
                     image: If the value is fd, then the boot image is assumed
                     to be a bootable floppy image.  If the value is hd, then
                     the the boot image is assumed to be a bootable hard disk
                     image.  If the value is no-emulation, the boot image is
                     used without floppy or hard disk emulation.  If the boot
                     image is exactly 1.2MB, 1.44MB, or 2.88MB, then the
                     default is fd, otherwise the default is no-emulation.
     Format iso9660 - filename and size extensions
             Various extensions to the base ISO9660 format.
             allow-ldots
                     If enabled, allows filenames to begin with a leading
                     period.  If disabled, filenames that begin with a leading
                     period will have that period replaced by an underscore
                     character in the standard ISO9660 namespace.  This does
                     not impact names stored in the Rockridge or Joliet
                     extension area.  Default: disabled.
             allow-lowercase
                     If enabled, allows filenames to contain lowercase
                     characters.  If disabled, filenames will be forced to
                     uppercase.  This does not impact names stored in the
                     Rockridge or Joliet extension area.  Default: disabled.
             allow-multidot
                     If enabled, allows filenames to contain multiple period
                     characters, in violation of the ISO9660 specification.
                     If disabled, additional periods will be converted to
                     underscore characters.  This does not impact names stored
                     in the Rockridge or Joliet extension area.  Default:
                     disabled.
             allow-period
                     If enabled, allows filenames to contain trailing period
                     characters, in violation of the ISO9660 specification.
                     If disabled,trailing periods will be converted to
                     underscore characters.  This does not impact names stored
                     in the Rockridge or Joliet extension area.  Default:
                     disabled.
             allow-pvd-lowercase
                     If enabled, the Primary Volume Descriptor may contain
                     lowercase ASCII characters, in violation of the ISO9660
                     specification.  If disabled, characters will be converted
                     to uppercase ASCII.  Default: disabled.
             allow-sharp-tilde
                     If enabled, sharp and tilde characters will be permitted
                     in filenames, in violation if the ISO9660 specification.
                     If disabled, such characters will be converted to
                     underscore characters.  Default: disabled.
             allow-vernum
                     If enabled, version numbers will be included with files.
                     If disabled, version numbers will be suppressed, in
                     violation of the ISO9660 standard.  This does not impact
                     names stored in the Rockridge or Joliet extension area.
                     Default: enabled.
             iso-level
                     This enables support for file size and file name
                     extensions in the core ISO9660 area.  The name extensions
                     specified here do not affect the names stored in the
                     Rockridge or Joliet extension areas.
                     iso-level=1
                             The most compliant form of ISO9660 image.
                             Filenames are limited to 8.3 uppercase format,
                             directory names are limited to 8 uppercase
                             characters, files are limited to 4 GiB, the
                             complete ISO9660 image cannot exceed 4 GiB.
                     iso-level=2
                             Filenames are limited to 30 uppercase characters
                             with a 30-character extension, directory names
                             are limited to 30 characters, files are limited
                             to 4 GiB.
                     iso-level=3
                             As with iso-level=2, except that files may exceed
                             4 GiB.
                     iso-level=4
                             As with iso-level=3, except that filenames may be
                             up to 193 characters and may include arbitrary
                             8-bit characters.
             joliet  Microsoft's Joliet extensions store a completely separate
                     set of directory information about each file.  In
                     particular, this information includes Unicode filenames
                     of up to 255 characters.  Default: enabled.
             limit-depth
                     If enabled, libarchive will use directory relocation
                     records to ensure that no pathname exceeds the ISO9660
                     limit of 8 directory levels.  If disabled, no relocation
                     will occur.  Default: enabled.
             limit-dirs
                     If enabled, libarchive will cause an error if there are
                     more than 65536 directories.  If disabled, there is no
                     limit on the number of directories.  Default: enabled
             pad     If enabled, 300 kiB of zero bytes will be appended to the
                     end of the archive.  Default: enabled
             relaxed-filenames
                     If enabled, all 7-bit ASCII characters are permitted in
                     filenames (except lowercase characters unless
                     allow-lowercase is also specified).  This violates
                     ISO9660 standards.  This does not impact names stored in
                     the Rockridge or Joliet extension area.  Default:
                     disabled.
             rockridge
                     The Rockridge extensions store an additional set of
                     POSIX-style file information with each file, including
                     mtime, atime, ctime, permissions, and long filenames with
                     arbitrary 8-bit characters.  These extensions also
                     support symbolic links and other POSIX file types.
                     Default: enabled.
     Format iso9660 - zisofs support
             The zisofs extensions permit each file to be independently
             compressed using a gzip-compatible compression.  This can provide
             significant size savings, but requires the reading system to have
             support for these extensions.  These extensions are disabled by
             default.
             compression-level=number
                     The compression level used by the deflate compressor.
                     Ranges from 0 (least effort) to 9 (most effort).
                     Default: 6
             zisofs  Synonym for zisofs=direct.
             zisofs=direct
                     Compress each file in the archive.  Unlike
                     zisofs=indirect, this is handled entirely within
                     libarchive and does not require a separate utility.  For
                     best results, libarchive tests each file and will store
                     the file uncompressed if the compression does not
                     actually save any space.  In particular, files under 2k
                     will never be compressed.  Note that boot image files are
                     never compressed.
             zisofs=indirect
                     Recognizes files that have already been compressed with
                     the mkzftree utility and sets up the necessary file
                     metadata so that readers will correctly identify these as
                     zisofs-compressed files.
             zisofs-exclude=filename
                     Specifies a filename that should not be compressed when
                     using zisofs=direct.  This option can be provided
                     multiple times to suppress compression on many files.

EXAMPLES

     The following example creates an archive write handle to create a gzip-
     compressed ISO9660 format image.  The two options here specify that the
     ISO9660 archive will use kernel.img as the boot image for El Torito
     booting, and that the gzip compressor should use the maximum compression
     level.

           a = archive_write_new();
           archive_write_add_filter_gzip(a);
           archive_write_set_format_iso9660(a);
           archive_write_set_options(a, "boot=kernel.img,compression=9");
           archive_write_open_filename(a, filename, blocksize);

ERRORS

     Detailed error codes and textual descriptions are available from the
     archive_errno() and archive_error_string() functions.

SEE ALSO

     tar(1), libarchive(3), archive_read_set_options(3), archive_write(3)

HISTORY

     The libarchive library first appeared in FreeBSD 5.3.

AUTHORS

     The options support for libarchive was originally implemented by
     Michihiro NAKAJIMA.

BUGS