Originální popis anglicky:
zcat - expand and concatenate data
Návod, kniha: POSIX Programmer's Manual
zcat [file...]
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.
None.
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.
The standard input shall be used only if no
file operands are specified,
or if a
file operand is
'-' .
Input files shall be compressed files that are in the format produced by the
compress utility.
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 .
Default.
The compressed files given as input shall be written on standard output in their
uncompressed form.
The standard error shall be used only for diagnostic messages.
None.
None.
The following exit values shall be returned:
- 0
- Successful completion.
- >0
- An error occurred.
Default.
The following sections are informative.
None.
None.
None.
None.
compress ,
uncompress
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
.
