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ZCAT(P) 			    POSIX Programmer's Manual				  ZCAT(P)

NAME
       zcat - expand and concatenate data

SYNOPSIS
       zcat [file...]

DESCRIPTION
       The  zcat  utility shall write to standard output the uncompressed form of files that have
       been compressed using the compress utility.  It is the equivalent of uncompress -c.  Input
       files are not affected.

OPTIONS
       None.

OPERANDS
       The following operand shall be supported:

       file   The  pathname  of  a  file  previously  processed  by the compress utility. If file
	      already has the .Z suffix specified, it is used as  submitted.  Otherwise,  the  .Z
	      suffix is appended to the filename prior to processing.

STDIN
       The  standard input shall be used only if no file operands are specified, or if a file op-
       erand is '-' .

INPUT FILES
       Input files shall be compressed files that are in the  format  produced	by  the  compress
       utility.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of zcat:

       LANG   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, Inter-
	      nationalization Variables for the precedence of internationalization variables used
	      to determine the values of locale categories.)

       LC_ALL If set to a non-empty string value, override the values of all the  other  interna-
	      tionalization variables.

       LC_CTYPE
	      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  argu-
	      ments).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic messages written to standard error.

       NLSPATH
	      Determine the location of message catalogs for the processing of LC_MESSAGES .

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The compressed files given as input shall be written on standard output	in  their  uncom-
       pressed form.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

	0     Successful completion.

       >0     An error occurred.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       compress , uncompress

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					  ZCAT(P)
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