1 ARCHIVE_WRITE_BLOCKSI... BSD Library Functions Manual ARCHIVE_WRITE_BLOCKSI...
4 1marchive_write_get_bytes_per_block22m, 1marchive_write_set_bytes_per_block22m,
5 1marchive_write_get_bytes_in_last_block22m,
6 1marchive_write_set_bytes_in_last_block 22m— functions for creating archives
9 Streaming Archive Library (libarchive, -larchive)
12 1m#include <archive.h>0m
15 1marchive_write_get_bytes_per_block22m(4mstruct24m 4marchive24m 4m*24m);
18 1marchive_write_set_bytes_per_block22m(4mstruct24m 4marchive24m 4m*24m, 4mint24m 4mbytes_per_block24m);
21 1marchive_write_get_bytes_in_last_block22m(4mstruct24m 4marchive24m 4m*24m);
24 1marchive_write_set_bytes_in_last_block22m(4mstruct24m 4marchive24m 4m*24m, 4mint24m);
27 1marchive_write_set_bytes_per_block22m()
28 Sets the block size used for writing the archive data. Every
29 call to the write callback function, except possibly the last
30 one, will use this value for the length. The default is to use a
31 block size of 10240 bytes. Note that a block size of zero will
32 suppress internal blocking and cause writes to be sent directly
33 to the write callback as they occur.
35 1marchive_write_get_bytes_per_block22m()
36 Retrieve the block size to be used for writing. A value of -1
37 here indicates that the library should use default values. A
38 value of zero indicates that internal blocking is suppressed.
40 1marchive_write_set_bytes_in_last_block22m()
41 Sets the block size used for writing the last block. If this
42 value is zero, the last block will be padded to the same size as
43 the other blocks. Otherwise, the final block will be padded to a
44 multiple of this size. In particular, setting it to 1 will cause
45 the final block to not be padded. For compressed output, any
46 padding generated by this option is applied only after the com‐
47 pression. The uncompressed data is always unpadded. The default
48 is to pad the last block to the full block size (note that
49 1marchive_write_open_filename22m() will set this based on the file
50 type). Unlike the other “set” functions, this function can be
51 called after the archive is opened.
53 1marchive_write_get_bytes_in_last_block22m()
54 Retrieve the currently-set value for last block size. A value of
55 -1 here indicates that the library should use default values.
58 1marchive_write_set_bytes_per_block22m() and
59 1marchive_write_set_bytes_in_last_block22m() return 1mARCHIVE_OK 22mon success, or
62 1marchive_write_get_bytes_per_block22m() and
63 1marchive_write_get_bytes_in_last_block22m() return currently configured block
64 size (-1 indicates the default block size), or 1mARCHIVE_FATAL22m.
67 Detailed error codes and textual descriptions are available from the
68 1marchive_errno22m() and 1marchive_error_string22m() functions.
71 tar(1), libarchive(3), archive_write_set_options(3), cpio(5), mtree(5),
74 BSD February 2, 2012 BSD