1ZCAT(1P) POSIX Programmer's Manual ZCAT(1P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 zcat — expand and concatenate data
13
15 zcat [file...]
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18 The zcat utility shall write to standard output the uncompressed form
19 of files that have been compressed using the compress utility. It is
20 the equivalent of uncompress -c. Input files are not affected.
21
23 None.
24
26 The following operand shall be supported:
27 file The pathname of a file previously processed by the compress
29 utility. If file already has the .Z suffix specified, it is
30 used as submitted. Otherwise, the .Z suffix is appended to
31 the filename prior to processing.
32
34 The standard input shall be used only if no file operands are speci‐
35 fied, or if a file operand is '-'.
36
38 Input files shall be compressed files that are in the format produced
39 by the compress utility.
40
42 The following environment variables shall affect the execution of zcat:
43 LANG Provide a default value for the internationalization vari‐
45 ables that are unset or null. (See the Base Definitions vol‐
46 ume of POSIX.1‐2017, Section 8.2, Internationalization Vari‐
47 ables for the precedence of internationalization variables
48 used to determine the values of locale categories.)
49 LC_ALL If set to a non-empty string value, override the values of
51 all the other internationalization variables.
52 LC_CTYPE Determine the locale for the interpretation of sequences of
54 bytes of text data as characters (for example, single-byte as
55 opposed to multi-byte characters in arguments).
56 LC_MESSAGES
58 Determine the locale that should be used to affect the format
59 and contents of diagnostic messages written to standard
60 error.
61 NLSPATH Determine the location of message catalogs for the processing
63 of LC_MESSAGES.
64
66 Default.
67
69 The compressed files given as input shall be written on standard output
70 in their uncompressed form.
71
73 The standard error shall be used only for diagnostic messages.
74
76 None.
77
79 None.
80
82 The following exit values shall be returned:
83 0 Successful completion.
85 >0 An error occurred.
87
89 Default.
90 The following sections are informative.
92
94 None.
95
97 None.
98
100 None.
101
103 None.
104
106 compress, uncompress
107 The Base Definitions volume of POSIX.1‐2017, Chapter 8, Environment
109 Variables
110
112 Portions of this text are reprinted and reproduced in electronic form
113 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
114 table Operating System Interface (POSIX), The Open Group Base Specifi‐
115 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
116 Electrical and Electronics Engineers, Inc and The Open Group. In the
117 event of any discrepancy between this version and the original IEEE and
118 The Open Group Standard, the original IEEE and The Open Group Standard
119 is the referee document. The original Standard can be obtained online
120 at http://www.opengroup.org/unix/online.html .
121 Any typographical or formatting errors that appear in this page are
123 most likely to have been introduced during the conversion of the source
124 files to man page format. To report such errors, see https://www.ker‐
125 nel.org/doc/man-pages/reporting_bugs.html .
126IEEE/The Open Group 2017 ZCAT(1P)