fiocompress

- file compression utility

Synopsis

/usr/sbin/fiocompress -c [-m] [-b block_size] input_file output_file

/usr/sbin/fiocompress -d input_file output_file

Description

The fiocompress utility is a file compression tool that works together with the dcfs(7FS) file system to perform per-file compression. You can use fiocompress to decompress a compressed file or mark a compressed file as compressed, causing automatic decompression on read. The primary use of fiocompress is to compress files in the boot archive.

Note that this utility is not a Committed interface. See attributes(5).

Options

The following options are supported:

-b block_size

Specify a block size for compression. The default block size is 8192.

-c

Compress the specified file.

-d

Decompress the specified file.

-m

Mark the compressed file for automatic decompression on read. Can be used only in conjunction with -c.

Exit Status

0

The command completed successfully.

–1

The command exited due to an error.

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

boot(1M), bootadm(1M), dcfs(7FS), ufs(7FS), attributes(5)

Notes

This compression/decompression utility works only with files stored in a UFS file system.

There is no obvious way to determine whether a given file is compressed, other than copying the file and comparing the number of disk blocks of the copy against the original.