The Single UNIX ® Specification, Version 2
Copyright © 1997 The Open Group
NAME
zcat - expand and concatenate data
SYNOPSIS
zcat [file...]
DESCRIPTION
The
zcat
utility will 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 is 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 will be used only if no
file
operands are specified, or if a
file
operand is "-".
INPUT FILES
Input files must be compressed files that are in the format produced by the
compress
utility.
ENVIRONMENT VARIABLES
The following environment variables affect the execution of
zcat:
- LANG
- Provide a default value for the internationalisation variables
that are unset or null.
If
LANG
is unset or null, the corresponding value from the
implementation-dependent default locale will be used.
If any of the internationalisation variables contains an invalid setting, the
utility will behave as if none of the variables had been defined.
- LC_ALL
-
If set to a non-empty string value,
override the values of all the other internationalisation variables.
- LC_CTYPE
-
Determine the
locale for the interpretation of sequences of bytes of text data as
characters (for example, single- 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 catalogues
for the processing of
LC_MESSAGES .
ASYNCHRONOUS EVENTS
Default.
STDOUT
The compressed files given as input will be written on standard
output in their uncompressed form.
STDERR
Used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
The following exit values are returned:
- 0
- Successful completion.
- >0
- An error occurred.
CONSEQUENCES OF ERRORS
Default.
APPLICATION USAGE
None.
EXAMPLES
None.
FUTURE DIRECTIONS
None.
SEE ALSO
compress,
uncompress,
zcat.
UNIX ® is a registered Trademark of The Open Group.
Copyright © 1997 The Open Group
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