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STRPTIME(3)		 BSD Library Functions Manual		   STRPTIME(3)

NAME
     strptime -- converts a character string to	a time value

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <time.h>

     char *
     strptime(const char * restrict buf, const char * restrict format,
	 struct	tm * restrict tm);

DESCRIPTION
     The strptime() function converts the character string pointed to by buf
     to	values which are stored	in the tm structure pointed to by tm, using
     the format	specified by format.

     The format	string consists	of zero	or more	conversion specifications,
     whitespace	characters as defined by isspace(), and	ordinary characters.
     All ordinary characters in	format are compared directly against the cor-
     responding	characters in buf; comparisons which fail will cause
     strptime()	to fail.  Whitespace characters	in format match	any number of
     whitespace	characters in buf, including none.

     A conversion specification	consists of a percent sign `%' followed	by one
     or	two conversion characters which	specify	the replacement	required.
     There must	be white-space or other	non-alphanumeric characters between
     any two conversion	specifications.

     Conversion	of alphanumeric	strings	(such as month and weekday names) is
     done without regard to case.  Conversion specifications which cannot be
     matched will cause	strptime() to fail.

     The LC_TIME category defines the locale values for	the conversion speci-
     fications.	 The following conversion specifications are supported:

     %a	   the day of week, using the locale's weekday names; either the ab-
	   breviated or	full name may be specified.

     %A	   the same as %a.

     %b	   the month, using the	locale's month names; either the abbreviated
	   or full name	may be specified.

     %B	   the same as %b.

     %c	   the date and	time, using the	locale's date and time format.

     %C	   the century number [0,99]; leading zeros are	permitted but not re-
	   quired.  This conversion should be used in conjunction with the %y
	   conversion.

     %d	   the day of month [1,31]; leading zeros are permitted	but not	re-
	   quired.

     %D	   the date as %m/%d/%y.

     %e	   the same as %d.

     %F	   the date as %Y-%m-%d	(the ISO 8601 date format).

     %g	   the year corresponding to the ISO week number, without the century.
	   (A NetBSD extension.)

     %G	   the year corresponding to the ISO week number, with the century.
	   (A NetBSD extension.)

     %h	   the same as %b.

     %H	   the hour (24-hour clock) [0,23]; leading zeros are permitted	but
	   not required.

     %I	   the hour (12-hour clock) [1,12]; leading zeros are permitted	but
	   not required.

     %j	   the day number of the year [1,366]; leading zeros are permitted but
	   not required.

     %k	   the same as %H.

     %l	   the same as %I.

     %m	   the month number [1,12]; leading zeros are permitted	but not	re-
	   quired.

     %M	   the minute [0,59]; leading zeros are	permitted but not required.

     %n	   any white-space, including none.

     %p	   the locale's	equivalent of a.m. or p.m.

     %r	   the time (12-hour clock) with %p, using the locale's	time format.

     %R	   the time as %H:%M.

     %S	   the seconds [0,61]; leading zeros are permitted but not required.

     %s	   the number of seconds since the Epoch, UTC (see mktime(3)).	(A
	   NetBSD extension.)

     %t	   any white-space, including none.

     %T	   the time as %H:%M:%S.

     %u	   the day of the week as a decimal number, where Monday = 1.  (A
	   NetBSD extension.)

     %U	   the week number of the year (Sunday as the first day	of the week)
	   as a	decimal	number [0,53]; leading zeros are permitted but not re-
	   quired.  All	days in	a year preceding the first Sunday are consid-
	   ered	to be in week 0.

     %V	   the ISO 8601:1988 week number as a decimal number.  If the week
	   (starting on	Monday)	that contains January 1	has more than three
	   days	in the new year, then it is considered the first week of the
	   year.  If it	has fewer than four days in the	new year, then it is
	   considered the last week of the previous year.  Weeks are numbered
	   from	1 to 53.  (A NetBSD extension.)

     %w	   the weekday as a decimal number [0,6], with 0 representing Sunday;
	   leading zeros are permitted but not required.

     %W	   the week number of the year (Monday as the first day	of the week)
	   as a	decimal	number [0,53]; leading zeros are permitted but not re-
	   quired.  All	days in	a year preceding the first Monday are consid-
	   ered	to be in week 0.

     %x	   the date, using the locale's	date format.

     %X	   the time, using the locale's	time format.

     %y	   the year within the 20th century [69,99] or the 21st	century
	   [0,68]; leading zeros are permitted but not required.  If specified
	   in conjunction with %C, specifies the year [0,99] within that cen-
	   tury.

     %Y	   the year, including the century (i.e., 1996).

     %z	   an ISO 8601 or RFC-2822 timezone specification.  This is one	of the
	   following: the offset from Coordinated Universal Time (`UTC') spec-
	   ified as: "[+-]hhmm", "[+-]hh:mm", or "[+-]hh"; `UTC' specified as:
	   "GMT" (`Greenwich Mean Time'), "UT" (`Universal Time'), or "Z"
	   (`Zulu Time'); a three character US timezone	specified as: "EDT",
	   "EST", "CDT", "CST",	"MDT", "MST", "PDT", or	"PST", with the	first
	   letter standing for `Eastern' ("E"),	`Central' ("C"), `Mountain'
	   ("M") or `Pacific' ("P"), and the second letter standing for
	   `Daylight' ("D" or summer) time or `Standard' ("S") time; a single
	   letter military timezone specified as: "A" through "I" and "K"
	   through "Y".	 (A NetBSD extension.)

     %Z	   timezone name or no characters when time zone information is	un-
	   available.  (A NetBSD extension.)

     %%	   matches a literal `%'.  No argument is converted.

   Modified conversion specifications
     For compatibility,	certain	conversion specifications can be modified by
     the E and O modifier characters to	indicate that an alternative format or
     specification should be used rather than the one normally used by the un-
     modified conversion specification.	 As there are currently	neither	alter-
     native formats nor	specifications supported by the	system,	the behavior
     will be as	if the unmodified conversion specification were	used.

     Case is ignored when matching string items	in buf,	such as	month and
     weekday names.

RETURN VALUES
     If	successful, the	strptime() function returns a pointer to the character
     following the last	character parsed.  Otherwise, a	NULL pointer is	re-
     turned.

SEE ALSO
     ctime(3), isspace(3), localtime(3), strftime(3), tm(3)

STANDARDS
     The strptime() function conforms to X/Open	Portability Guide Issue	4
     ("XPG4").

BUGS
     The %Z format specifier only accepts timezone abbreviations of the	local
     timezone, or the value "GMT".  This limitation is caused by the ambiguity
     of	overloaded timezone abbreviations, for example EST is both Eastern
     Standard Time and Eastern Australia Summer	Time.

BSD				April 12, 2011				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | BUGS

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