STRPTIME(3)               OpenBSD Programmer's Manual              STRPTIME(3)

NAME
     strptime - converts a character string to a time value

SYNOPSIS
     #include <time.h>

     char *
     strptime(const char *buf, const char *format, struct tm *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 directives.  A directive is
     composed of either one or more whitespace characters as defined by
     isspace(3), an ordinary character (neither `%' nor a whitespace), or a
     conversion specification.  A conversion specification consists of a per-
     cent sign (`%') followed by one or two conversion characters which speci-
     fy the replacement required.  There must be whitespace or other non-al-
     phanumeric characters between any two conversion specifications.

     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.  Note that the converted value is added to the current val-
           ue of the ``tm_year'' field (in order that the "%y" conversion be
           useful).

     %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.

     %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 whitespace.

     %p    the locale's equivalent of ``AM'' or ``PM''.

     %r    the time as %I:%M:%S %p.

     %R    the time as %H:%M.

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

     %t    any whitespace.

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

     %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.

     %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 current century.  When a century is not other-
           wise specified, values in the range 69-99 refer to years in the
           twentieth century (1969 to 1999 inclusive); values in the range
           00-68 refer to years in the twenty-first century (2000 to 2068 in-
           clusive).  Leading zeros are permitted but not required.

     %Y    the year, including the century (i.e., 1998).

     %%    A `%' is written.  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
     strftime(3)

STANDARDS
     The strptime() function conforms to X/Open Portability Guide Issue 4.2
     (``XPG4.2'').

OpenBSD 4.1                     March 14, 1998                               3
