2.11BSD#431 - /usr/man/cat3/strftime.0

STRFTIME(3)	    UNIX Programmer's Manual	      STRFTIME(3)


NAME
     strftime - format date and time

SYNOPSIS
     #include <sys/types.h>
     #include <time.h>
     #include <string.h>

     size_t strftime(buf, maxsize, format, timeptr)
     char *buf;
     size_t maxsize;
     char *format;
     struct tm *timeptr;

DESCRIPTION
     The strftime() function formats the information from timeptr
     into the buffer buf according to the string pointed to by
     format.

     The format string consists of zero or more conversion
     specifications and ordinary characters.  All ordinary char-
     acters are copied directly into the buffer.  A conversion
     specification consists of a percent sign ``%'' and one other
     character.

     No more than maxsize characters will be placed into the
     array.  If the total number of resulting characters, includ-
     ing the terminating null character, is not more than max-
     size, strftime() returns the number of characters in the
     array, not counting the terminating null.	Otherwise, zero
     is returned.

     Each conversion specification is replaced by the characters
     as follows which are then copied into the buffer.

     %A     is replaced by the full weekday name.

     %a     is replaced by the abbreviated weekday name, where
	    the abbreviation is the first three characters.

     %B     is replaced by the full month name.

     %b or %h
	    is replaced by the abbreviated month name, where the
	    abbreviation is the first three characters.

     %C  is equivalent to ``%a %b %e %H:%M:%S %Y'' (the format
	 produced by asctime(3)).

     %c     is equivalent to ``%m/%d/%y''.

     %D     is replaced by the date in the format ``mm/dd/yy''.


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STRFTIME(3)	    UNIX Programmer's Manual	      STRFTIME(3)


     %d     is replaced by the day of the month as a decimal
	    number (01-31).

     %e     is replaced by the day of month as a decimal number
	    (1-31); single digits are preceded by a blank.

     %H     is replaced by the hour (24-hour clock) as a decimal
	    number (00-23).

     %I     is replaced by the hour (12-hour clock) as a decimal
	    number (01-12).

     %j     is replaced by the day of the year as a decimal
	    number (001-366).

     %k     is replaced by the hour (24-hour clock) as a decimal
	    number (0-23); single digits are preceded by a blank.

     %l     is replaced by the hour (12-hour clock) as a decimal
	    number (1-12); single digits are preceded by a blank.

     %M     is replaced by the minute as a decimal number (00-
	    59).

     %m     is replaced by the month as a decimal number (01-12).

     %n     is replaced by a newline.

     %p     is replaced by either ``AM'' or ``PM'' as appropri-
	    ate.

     %R     is equivalent to ``%H:%M''

     %r     is equivalent to ``%I:%M:%S %p'' .

     %t     is replaced by a tab.

     %S     is replaced by the second as a decimal number (00-
	    60).

     %T or %X
	    is equivalent to "%H:%M:%S" .

     %U     is replaced by the week number of the year (Sunday as
	    the first day of the week) as a decimal number (00-
	    53).

     %W     is replaced by the week number of the year (Monday as
	    the first day of the week) as a decimal number (00-
	    53).

     %w     is replaced by the weekday (Sunday as the first day


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STRFTIME(3)	    UNIX Programmer's Manual	      STRFTIME(3)


	    of the week) as a decimal number (0-6).

     %x     is equivalent to ``%m/%d/%y %H:%M:%S'' .

     %Y     is replaced by the year with century as a decimal
	    number.

     %y     is replaced by the year without century as a decimal
	    number (00-99).

     %Z     is replaced by the time zone name.

     %%     is replaced by `%' .

SEE ALSO
     date(1), ctime(3), printf(1), printf(3)

STANDARDS
     The strftime() function conforms to ANSI X C3.159-
     1989(``ANSI C'').

BUGS
     There is no conversion specification for the phase of the
     moon.


Printed 11/26/99	  April 1, 1995                         3