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Diffstat (limited to 'time/newctime.3')
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diff --git a/time/newctime.3 b/time/newctime.3 deleted file mode 100644 index 463936078..000000000 --- a/time/newctime.3 +++ /dev/null @@ -1,220 +0,0 @@ -.TH NEWCTIME 3 -.SH NAME -asctime, ctime, difftime, gmtime, localtime, mktime \- convert date and time to ASCII -.SH SYNOPSIS -.nf -.B extern char *tzname[2]; -.PP -.B void tzset() -.PP -.B #include <sys/types.h> -.PP -.B char *ctime(clock) -.B time_t *clock; -.PP -.B double difftime(time1, time0) -.B time_t time1; -.B time_t time0; -.PP -.B #include <time.h> -.PP -.B char *asctime(tm) -.B struct tm *tm; -.PP -.B struct tm *localtime(clock) -.B long *clock; -.PP -.B struct tm *gmtime(clock) -.B long *clock; -.PP -.B time_t mktime(tm) -.B struct tm *tm; -.PP -.B cc ... -lz -.fi -.SH DESCRIPTION -.I Ctime\^ -converts a long integer, pointed to by -.IR clock , -representing the time in seconds since -00:00:00 UTC, January 1, 1970, -and returns a pointer to a -26-character string -of the form -.br -.ce -.eo -Thu Nov 24 18:22:48 1986\n\0 -.ec -.br -All the fields have constant width. -.PP -.IR Localtime\^ -and -.I gmtime\^ -return pointers to ``tm'' structures, described below. -.I Localtime\^ -corrects for the time zone and any time zone adjustments -(such as Daylight Saving Time in the U.S.A.). -Before doing so, -.I localtime\^ -calls -.I tzset\^ -(if -.I tzset\^ -has not been called in the current process). -After filling in the ``tm'' structure, -.I localtime -sets the -.BR tm_isdst 'th -element of -.B tzname -to a pointer to an -ASCII string that's the time zone abbreviation to be used with -.IR localtime 's -return value. -.PP -.I Gmtime\^ -converts to Coordinated Universal Time. -.PP -.I Asctime\^ -converts a time value contained in a -``tm'' structure to a 26-character string, -as shown in the above example, -and returns a pointer -to the string. -.PP -.I Mktime\^ -converts the broken-down time, -expressed as local time, -in the structure pointed to by -.I tm -into a calendar time value with the same encoding as that of the values -returned by the -.I time -function. -The original values of the -.B tm_wday -and -.B tm_yday -components of the structure are ignored, -and the original values of the other components are not restricted -to their normal ranges. -(A positive or zero value for -.B tm_isdst -causes -.I mktime -to presume initially that summer time (for example, Daylight Saving Time -in the U.S.A.) -respectively, -is or is not in effect for the specified time. -A negative value for -.B tm_isdst -causes the -.I mktime -function to attempt to divine whether summer time is in effect -for the specified time.) -On successful completion, the values of the -.B tm_wday -and -.B tm_yday -components of the structure are set appropriately, -and the other components are set to represent the specified calendar time, -but with their values forced to their normal ranges; the final value of -.B tm_mday -is not set until -.B tm_mon -and -.B tm_year -are determined. -.I Mktime\^ -returns the specified calendar time; -If the calendar time cannot be represented, -it returns -.BR -1 . -.PP -.I Difftime\^ -returns the difference between two calendar times, -.RI ( time1 -- -.IR time0 ), -expressed in seconds. -.PP -Declarations of all the functions and externals, and the ``tm'' structure, -are in the -.B <time.h>\^ -header file. -The structure (of type) -.B struct tm -includes the following fields: -.RS -.PP -.nf -.ta .5i +\w'long tm_gmtoff;\0\0'u - int tm_sec; /\(** seconds (0 - 60) \(**/ - int tm_min; /\(** minutes (0 - 59) \(**/ - int tm_hour; /\(** hours (0 - 23) \(**/ - int tm_mday; /\(** day of month (1 - 31) \(**/ - int tm_mon; /\(** month of year (0 - 11) \(**/ - int tm_year; /\(** year \- 1900 \(**/ - int tm_wday; /\(** day of week (Sunday = 0) \(**/ - int tm_yday; /\(** day of year (0 - 365) \(**/ - int tm_isdst; /\(** is summer time in effect? \(**/ - char \(**tm_zone; /\(** abbreviation of timezone name \(**/ - long tm_gmtoff; /\(** offset from UTC in seconds \(**/ -.fi -.RE -.PP -The -.I tm_zone -and -.I tm_gmtoff -fields exist, and are filled in, only if arrangements to do -so were made when the library containing these functions was -created. -There is no guarantee that these fields will continue to exist -in this form in future releases of this code. -.PP -.I Tm_isdst\^ -is non-zero if summer time is in effect. -.PP -.I Tm_gmtoff -is the offset (in seconds) of the time represented -from UTC, with positive values indicating east -of the Prime Meridian. -.SH FILES -.ta \w'/usr/local/etc/zoneinfo/posixrules\0\0'u -/usr/local/etc/zoneinfo time zone information directory -.br -/usr/local/etc/zoneinfo/localtime local time zone file -.br -/usr/local/etc/zoneinfo/posixrules used with POSIX-style TZ's -.br -/usr/local/etc/zoneinfo/GMT for UTC leap seconds -.sp -If -.B /usr/local/etc/zoneinfo/GMT -is absent, -UTC leap seconds are loaded from -.BR /usr/local/etc/zoneinfo/posixrules . -.SH SEE ALSO -getenv(3), -newtzset(3), -time(2), -tzfile(5) -.SH NOTES -The return values point to static data; -the data is overwritten by each call. -The -.B tm_zone -field of a returned -.B "struct tm" -points to a static array of characters, which -will also be overwritten at the next call -(and by calls to -.IR tzset ). -.PP -Avoid using out-of-range values with -.I mktime -when setting up lunch with promptness sticklers in Riyadh. -.\" @(#)newctime.3 7.9 |