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TM(3) BSD Library Functions Manual TM(3) NAME tm -- time structure SYNOPSIS #include <time.h> DESCRIPTION The <time.h> header defines the tm structure that contains calendar dates and time broken down into components. The following standards-compliant fields are present: Type Field Represents Range int tm_sec Seconds [0, 61] int tm_min Minutes [0, 59] int tm_hour Hours since midnight [0, 23] int tm_mday Day of the month [1, 31] int tm_mon Months since January [0, 11] int tm_year Years since 1900 int tm_wday Days since Sunday [0, 6] int tm_yday Days since January 1 [0, 365] int tm_isdt Positive if daylight savings >= 0 The tm structure is used by various common library routines such as mktime(3), localtime(3), and strptime(3). All fields described above are defined in the IEEE Std 1003.1-2008 ("POSIX.1") standard. NetBSD Extensions In addition, the following NetBSD-specific fields are available: Type Field Represents int tm_gmtoff Offset from UTC in seconds __aconst char tm_zone Timezone abbreviation The tm_zone and tm_gmtoff fields exist, and are filled in by applicable library routines, only if arrangements to do so were made when the li- brary containing these functions was created. There is no guarantee that these fields will continue to exist in this form in future releases of NetBSD. The tm_gmtoff field denotes the offset (in seconds) of the time repre- sented from UTC, with positive values indicating east of the Prime Merid- ian. The tm_zone field will become invalid and point to freed storage if the corresponding struct tm was returned by localtime_rz(3) and the const timezone_t tz argument has been freed by tzfree(3). SEE ALSO asctime(3), offtime(3), timeval(3), wcsftime(3) STANDARDS The tm structure conforms to IEEE Std 1003.1-2008 ("POSIX.1") with re- spect to the described standard structure members. BSD April 14, 2011 BSD
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | STANDARDS
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