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 differ (con-
       sult 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 precedence  of  international-
              ization 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 stan-
              dard 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,  Standard  for
       Information  Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                       CAL(1P)