NAME

     archive_write_get_bytes_per_block, archive_write_set_bytes_per_block,
     archive_write_get_bytes_in_last_block, archive_write_set_bytes_in_last_block — functions for
     creating archives

LIBRARY

     Streaming Archive Library (libarchive, -larchive)

SYNOPSIS

     #include <archive.h>

     int
     archive_write_get_bytes_per_block(struct archive *);

     int
     archive_write_set_bytes_per_block(struct archive *, int bytes_per_block);

     int
     archive_write_get_bytes_in_last_block(struct archive *);

     int
     archive_write_set_bytes_in_last_block(struct archive *, int);

DESCRIPTION

     archive_write_set_bytes_per_block()
             Sets the block size used for writing the archive data.  Every call to the write
             callback function, except possibly the last one, will use this value for the length.
             The default is to use a block size of 10240 bytes.  Note that a block size of zero
             will suppress internal blocking and cause writes to be sent directly to the write
             callback as they occur.

     archive_write_get_bytes_per_block()
             Retrieve the block size to be used for writing.  A value of -1 here indicates that
             the library should use default values.  A value of zero indicates that internal
             blocking is suppressed.

     archive_write_set_bytes_in_last_block()
             Sets the block size used for writing the last block.  If this value is zero, the
             last block will be padded to the same size as the other blocks.  Otherwise, the
             final block will be padded to a multiple of this size.  In particular, setting it to
             1 will cause the final block to not be padded.  For compressed output, any padding
             generated by this option is applied only after the compression.  The uncompressed
             data is always unpadded.  The default is to pad the last block to the full block
             size (note that archive_write_open_filename() will set this based on the file type).
             Unlike the other “set” functions, this function can be called after the archive is
             opened.

     archive_write_get_bytes_in_last_block()
             Retrieve the currently-set value for last block size.  A value of -1 here indicates
             that the library should use default values.

RETURN VALUES

     archive_write_set_bytes_per_block() and archive_write_set_bytes_in_last_block() return
     ARCHIVE_OK on success, or ARCHIVE_FATAL.

     archive_write_get_bytes_per_block() and archive_write_get_bytes_in_last_block() return
     currently configured block size (-1 indicates the default block size), or ARCHIVE_FATAL.

ERRORS

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

SEE ALSO

     tar(1), archive_write_set_options(3), libarchive(3), cpio(5), mtree(5), tar(5)