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75 lines
2.9 KiB
Text
75 lines
2.9 KiB
Text
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ARCHIVE_WRITE_BLOCKSI... BSD Library Functions Manual ARCHIVE_WRITE_BLOCKSI...
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NAME
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archive_write_get_bytes_per_block, archive_write_set_bytes_per_block,
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archive_write_get_bytes_in_last_block,
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archive_write_set_bytes_in_last_block -- functions for creating archives
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LIBRARY
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Streaming Archive Library (libarchive, -larchive)
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SYNOPSIS
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#include <archive.h>
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int
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archive_write_get_bytes_per_block(struct archive *);
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int
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archive_write_set_bytes_per_block(struct archive *, int bytes_per_block);
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int
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archive_write_get_bytes_in_last_block(struct archive *);
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int
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archive_write_set_bytes_in_last_block(struct archive *, int);
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DESCRIPTION
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archive_write_set_bytes_per_block()
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Sets the block size used for writing the archive data. Every
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call to the write callback function, except possibly the last
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one, will use this value for the length. The default is to use a
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block size of 10240 bytes. Note that a block size of zero will
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suppress internal blocking and cause writes to be sent directly
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to the write callback as they occur.
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archive_write_get_bytes_per_block()
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Retrieve the block size to be used for writing. A value of -1
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here indicates that the library should use default values. A
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value of zero indicates that internal blocking is suppressed.
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archive_write_set_bytes_in_last_block()
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Sets the block size used for writing the last block. If this
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value is zero, the last block will be padded to the same size as
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the other blocks. Otherwise, the final block will be padded to a
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multiple of this size. In particular, setting it to 1 will cause
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the final block to not be padded. For compressed output, any
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padding generated by this option is applied only after the com-
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pression. The uncompressed data is always unpadded. The default
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is to pad the last block to the full block size (note that
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archive_write_open_filename() will set this based on the file
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type). Unlike the other ``set'' functions, this function can be
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called after the archive is opened.
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archive_write_get_bytes_in_last_block()
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Retrieve the currently-set value for last block size. A value of
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-1 here indicates that the library should use default values.
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RETURN VALUES
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archive_write_set_bytes_per_block() and
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archive_write_set_bytes_in_last_block() return ARCHIVE_OK on success, or
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ARCHIVE_FATAL.
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archive_write_get_bytes_per_block() and
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archive_write_get_bytes_in_last_block() return currently configured block
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size (-1 indicates the default block size), or ARCHIVE_FATAL.
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ERRORS
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Detailed error codes and textual descriptions are available from the
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archive_errno() and archive_error_string() functions.
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SEE ALSO
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tar(1), archive_write_set_options(3), libarchive(3), cpio(5), mtree(5),
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tar(5)
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BSD February 2, 2012 BSD
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