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