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'\" te .\" Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. .TH fiocompress 8 "31 Mar 2011" "Oracle Solaris 11.4" "System Administration Commands" .SH NAME fiocompress \- file compression utility .SH SYNOPSIS .LP .nf \fB/usr/sbin/fiocompress\fR \fB-c\fR [\fB-m\fR] [\fB-b\fR \fIblock_size\fR] \fIinput_file\fR \fIoutput_file\fR .fi .LP .nf \fB/usr/sbin/fiocompress\fR \fB-d\fR \fIinput_file\fR \fIoutput_file\fR .fi .SH DESCRIPTION .sp .LP The \fBfiocompress\fR utility is a file compression tool that works together with the \fBdcfs\fR(4FS) file system to perform per-file compression. You can use \fBfiocompress\fR to decompress a compressed file or mark a compressed file as compressed, causing automatic decompression on read. The primary use of \fBfiocompress\fR is to compress files in the boot archive. .sp .LP Note that this utility is not a Committed interface. See \fBattributes\fR(7). .SH OPTIONS .sp .LP The following options are supported: .sp .ne 2 .mk .na \fB\fB-b\fR \fIblock_size\fR\fR .ad .br .sp .6 .RS 4n Specify a block size for compression. The default block size is 8192. .RE .sp .ne 2 .mk .na \fB\fB-c\fR\fR .ad .br .sp .6 .RS 4n Compress the specified file. .RE .sp .ne 2 .mk .na \fB\fB-d\fR\fR .ad .br .sp .6 .RS 4n Decompress the specified file. .RE .sp .ne 2 .mk .na \fB\fB-m\fR\fR .ad .br .sp .6 .RS 4n Mark the compressed file for automatic decompression on read. Can be used only in conjunction with \fB-c\fR. .RE .SH EXIT STATUS .sp .ne 2 .mk .na \fB\fB0\fR\fR .ad .br .sp .6 .RS 4n The command completed successfully. .RE .sp .ne 2 .mk .na \fB\fB-1\fR\fR .ad .br .sp .6 .RS 4n The command exited due to an error. .RE .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Availability system/core-os _ Interface Stability Private .TE .sp .SH SEE ALSO .sp .LP \fBdcfs\fR(4FS), \fBufs\fR(4FS), \fBattributes\fR(7), \fBboot\fR(8), \fBbootadm\fR(8) .SH NOTES .sp .LP This compression/decompression utility works only with files stored in a UFS file system. .sp .LP 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.