This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       Default.

       Default.

       Thefollowingsectionsareinformative.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                          ZCAT(1POSIX)

       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.

       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 POSIX.1‐2017, Section8.2, InternationalizationVariables  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.

       None.

       The following exit values shall be returned:

        0    Successful completion.

       >0    An error occurred.

       None.

       None.

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

       zcat — expand and concatenate data

       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.

       None.

       None.

       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.

       None.

compress, uncompress

       The Base Definitions volume of POSIX.1‐2017, Chapter8, EnvironmentVariables

       The standard error shall be used only for diagnostic messages.

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

       The compressed files given as input shall be written on standard output in their uncompressed form.

       zcat [file...]