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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "UNCOMPRESS" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" uncompress 
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.SH NAME
+uncompress \- expand compressed data
+.SH SYNOPSIS
+.LP
+\fBuncompress\fP \fB[\fP\fB-cfv\fP\fB][\fP\fIfile\fP\fB...\fP\fB]\fP\fB\fP
+.SH DESCRIPTION
+.LP
+The \fIuncompress\fP utility shall restore files to their original
+state after they have been compressed using the \fIcompress\fP utility.
+If no files are specified, the standard input shall be uncompressed
+to
+the standard output. If the invoking process has appropriate privileges,
+the ownership, modes, access time, and modification time
+of the original file shall be preserved.
+.LP
+This utility shall support the uncompressing of any files produced
+by the \fIcompress\fP utility on the same implementation. For files
+produced by \fIcompress\fP on other systems, \fIuncompress\fP supports
+9 to 14-bit compression (see \fIcompress\fP, \fB-b\fP); it is implementation-defined
+whether values of \fB-b\fP greater than 14 are
+supported.
+.SH OPTIONS
+.LP
+The \fIuncompress\fP utility shall conform to the Base Definitions
+volume of IEEE\ Std\ 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
+.LP
+The following options shall be supported:
+.TP 7
+\fB-c\fP
+Write to standard output; no files are changed.
+.TP 7
+\fB-f\fP
+Do not prompt for overwriting files. Except when run in the background,
+if \fB-f\fP is not given the user shall be prompted as
+to whether an existing file should be overwritten. If the standard
+input is not a terminal and \fB-f\fP is not given,
+\fIuncompress\fP shall write a diagnostic message to standard error
+and exit with a status greater than zero.
+.TP 7
+\fB-v\fP
+Write messages to standard error concerning the expansion of each
+file.
+.sp
+.SH OPERANDS
+.LP
+The following operand shall be supported:
+.TP 7
+\fIfile\fP
+A pathname of a file. If \fIfile\fP already has the \fB.Z\fP suffix
+specified, it shall be used as the input file and the
+output file shall be named \fBfile\fP with the \fB.Z\fP suffix removed.
+Otherwise, \fIfile\fP shall be used as the name of the
+output file and \fBfile\fP with the \fB.Z\fP suffix appended shall
+be used as the input file.
+.sp
+.SH STDIN
+.LP
+The standard input shall be used only if no \fIfile\fP operands are
+specified, or if a \fIfile\fP operand is \fB'-'\fP
+\&.
+.SH INPUT FILES
+.LP
+Input files shall be in the format produced by the \fIcompress\fP
+utility.
+.SH ENVIRONMENT VARIABLES
+.LP
+The following environment variables shall affect the execution of
+\fIuncompress\fP:
+.TP 7
+\fILANG\fP
+Provide a default value for the internationalization variables that
+are unset or null. (See the Base Definitions volume of
+IEEE\ Std\ 1003.1-2001, Section 8.2, Internationalization Variables
+for
+the precedence of internationalization variables used to determine
+the values of locale categories.)
+.TP 7
+\fILC_ALL\fP
+If set to a non-empty string value, override the values of all the
+other internationalization variables.
+.TP 7
+\fILC_CTYPE\fP
+Determine the locale for the interpretation of sequences of bytes
+of text data as characters (for example, single-byte as
+opposed to multi-byte characters in arguments).
+.TP 7
+\fILC_MESSAGES\fP
+Determine the locale that should be used to affect the format and
+contents of diagnostic messages written to standard
+error.
+.TP 7
+\fINLSPATH\fP
+Determine the location of message catalogs for the processing of \fILC_MESSAGES
+\&.\fP
+.sp
+.SH ASYNCHRONOUS EVENTS
+.LP
+Default.
+.SH STDOUT
+.LP
+When there are no \fIfile\fP operands or the \fB-c\fP option is specified,
+the uncompressed output is written to standard
+output.
+.SH STDERR
+.LP
+Prompts shall be written to the standard error output under the conditions
+specified in the DESCRIPTION and OPTIONS sections.
+The prompts shall contain the \fIfile\fP pathname, but their format
+is otherwise unspecified. Otherwise, the standard error output
+shall be used only for diagnostic messages.
+.SH OUTPUT FILES
+.LP
+Output files are the same as the respective input files to \fIcompress\fP.
+.SH EXTENDED DESCRIPTION
+.LP
+None.
+.SH EXIT STATUS
+.LP
+The following exit values shall be returned:
+.TP 7
+\ 0
+Successful completion.
+.TP 7
+>0
+An error occurred.
+.sp
+.SH CONSEQUENCES OF ERRORS
+.LP
+The input file remains unmodified.
+.LP
+\fIThe following sections are informative.\fP
+.SH APPLICATION USAGE
+.LP
+The limit of 14 on the \fIcompress\fP \fB-b\fP \fIbits\fP argument
+is to achieve
+portability to all systems (within the restrictions imposed by the
+lack of an explicit published file format). Some implementations
+based on 16-bit architectures cannot support 15 or 16-bit uncompression.
+.SH EXAMPLES
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIcompress\fP, \fIzcat\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .