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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 operand 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,    Internationalization
              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 internationalization 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 arguments).

       LC_MESSAGES
              Determine  the  locale  that should be used to affect the format
              and contents of diagnostic 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 uncompressed 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 original Standard can be obtained online
       at http://www.opengroup.org/unix/online.php .



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