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zcat.1p (3879B)

    

  1. '\" et
  2. .TH ZCAT "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
  3. .\"
  4. .SH PROLOG
  5. This manual page is part of the POSIX Programmer's Manual.
  6. The Linux implementation of this interface may differ (consult
  7. the corresponding Linux manual page for details of Linux behavior),
  8. or the interface may not be implemented on Linux.
  9. .\"
  10. .SH NAME
  11. zcat
  12. \(em expand and concatenate data
  13. .SH SYNOPSIS
  14. .LP
  15. .nf
  16. zcat \fB[\fIfile\fR...\fB]\fR
  17. .fi
  18. .SH DESCRIPTION
  19. The
  20. .IR zcat
  21. utility shall write to standard output the uncompressed form of files
  22. that have been compressed using the
  23. .IR compress
  24. utility. It is the equivalent of
  25. .IR uncompress
  26. .BR \-c .
  27. Input files are not affected.
  28. .SH OPTIONS
  29. None.
  30. .SH OPERANDS
  31. The following operand shall be supported:
  32. .IP "\fIfile\fR" 10
  33. The pathname of a file previously processed by the
  34. .IR compress
  35. utility. If
  36. .IR file
  37. already has the
  38. .BR .Z
  39. suffix specified, it is used as submitted. Otherwise, the
  40. .BR .Z
  41. suffix is appended to the filename prior to processing.
  42. .SH STDIN
  43. The standard input shall be used only if no
  44. .IR file
  45. operands are specified, or if a
  46. .IR file
  47. operand is
  48. .BR '\-' .
  49. .SH "INPUT FILES"
  50. Input files shall be compressed files that are in the format produced by
  51. the
  52. .IR compress
  53. utility.
  54. .SH "ENVIRONMENT VARIABLES"
  55. The following environment variables shall affect the execution of
  56. .IR zcat :
  57. .IP "\fILANG\fP" 10
  58. Provide a default value for the internationalization variables that are
  59. unset or null. (See the Base Definitions volume of POSIX.1\(hy2017,
  60. .IR "Section 8.2" ", " "Internationalization Variables"
  61. for the precedence of internationalization variables used to determine
  62. the values of locale categories.)
  63. .IP "\fILC_ALL\fP" 10
  64. If set to a non-empty string value, override the values of all the
  65. other internationalization variables.
  66. .IP "\fILC_CTYPE\fP" 10
  67. Determine the locale for the interpretation of sequences of bytes of
  68. text data as characters (for example, single-byte as opposed to
  69. multi-byte characters in arguments).
  70. .IP "\fILC_MESSAGES\fP" 10
  71. .br
  72. Determine the locale that should be used to affect the format and
  73. contents of diagnostic messages written to standard error.
  74. .IP "\fINLSPATH\fP" 10
  75. Determine the location of message catalogs for the processing of
  76. .IR LC_MESSAGES .
  77. .SH "ASYNCHRONOUS EVENTS"
  78. Default.
  79. .SH STDOUT
  80. The compressed files given as input shall be written on standard output
  81. in their uncompressed form.
  82. .SH STDERR
  83. The standard error shall be used only for diagnostic messages.
  84. .SH "OUTPUT FILES"
  85. None.
  86. .SH "EXTENDED DESCRIPTION"
  87. None.
  88. .SH "EXIT STATUS"
  89. The following exit values shall be returned:
  90. .IP "\00" 6
  91. Successful completion.
  92. .IP >0 6
  93. An error occurred.
  94. .SH "CONSEQUENCES OF ERRORS"
  95. Default.
  96. .LP
  97. .IR "The following sections are informative."
  98. .SH "APPLICATION USAGE"
  99. None.
  100. .SH EXAMPLES
  101. None.
  102. .SH RATIONALE
  103. None.
  104. .SH "FUTURE DIRECTIONS"
  105. None.
  106. .SH "SEE ALSO"
  107. .IR "\fIcompress\fR\^",
  108. .IR "\fIuncompress\fR\^"
  109. .P
  110. The Base Definitions volume of POSIX.1\(hy2017,
  111. .IR "Chapter 8" ", " "Environment Variables"
  112. .\"
  113. .SH COPYRIGHT
  114. Portions of this text are reprinted and reproduced in electronic form
  115. from IEEE Std 1003.1-2017, Standard for Information Technology
  116. -- Portable Operating System Interface (POSIX), The Open Group Base
  117. Specifications Issue 7, 2018 Edition,
  118. Copyright (C) 2018 by the Institute of
  119. Electrical and Electronics Engineers, Inc and The Open Group.
  120. In the event of any discrepancy between this version and the original IEEE and
  121. The Open Group Standard, the original IEEE and The Open Group Standard
  122. is the referee document. The original Standard can be obtained online at
  123. http://www.opengroup.org/unix/online.html .
  124. .PP
  125. Any typographical or formatting errors that appear
  126. in this page are most likely
  127. to have been introduced during the conversion of the source files to
  128. man page format. To report such errors, see
  129. https://www.kernel.org/doc/man-pages/reporting_bugs.html .