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CAL(1P)                    POSIX Programmer's Manual                   CAL(1P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       cal - print a calendar

SYNOPSIS
       cal [[month] year ]

DESCRIPTION
       The cal utility shall write a calendar to standard output using the Julian calendar for dates from January 1, 1
       through September 2, 1752 and the Gregorian calendar for dates from September 14,  1752  through  December  31,
       9999 as though the Gregorian calendar had been adopted on September 14, 1752.

OPTIONS
       None.

OPERANDS
       The following operands shall be supported:

       month  Specify  the  month to be displayed, represented as a decimal integer from 1 (January) to 12 (December).
              The default shall be the current month.

       year   Specify the year for which the calendar is displayed, represented as a decimal integer from 1  to  9999.
              The default shall be the current year.


STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of cal:

       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  prece-
              dence 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  exam-
              ple, 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 writ-
              ten to standard error, and informative messages written to standard output.

       LC_TIME
              Determine the format and contents of the calendar.

       NLSPATH
              Determine the location of message catalogs for the processing of LC_MESSAGES .

       TZ     Determine the timezone used to calculate the value of the current month.


ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The standard output shall be used to display the calendar, in an unspecified format.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

        0     Successful completion.

       >0     An error occurred.


CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       Note that:


              cal 83

       refers to A.D. 83, not 1983.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       A future version of IEEE Std 1003.1-2001 may support locale-specific recognition of the date of adoption of the
       Gregorian calendar.

SEE ALSO
       None.

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  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 Stan-
       dard,  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 .



IEEE/The Open Group                  2003                              CAL(1P)