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int tm_sec     /* seconds [0,60] */int tm_min     /* minutes [0,59] */int tm_hour    /* hour [0,23] */int tm_mday    /* day of month [1,31] */int tm_mon     /* month of year [0,11] */int tm_year    /* years since 1900 */int tm_wday    /* day of week [0,6] (Sunday =0) */int tm_yday    /* day of year [0,365] */int tm_isdst   /* daylight savings flag */

The value oftm_isdst is positive if Daylight Saving Time is ineffect, 0 if Daylight Saving Time is not in effect, and negativeif the information is not available.

The <time.h> header defines the following symbolic names:

NULL: Null pointer constant.
CLOCKS_PER_SEC: A number used to convert the value returned by theclock() function into seconds. Seeclock(3C).
CLOCK_PROCESS_CPUTIME_ID: The identifier of the CPU-time clock associated with the process making aclock() ortimer*() function call.
CLOCK_THREAD_CPUTIME_ID: The identifier of the CPU-time clock associated with the thread making aclock() ortimer*() function call.

The <time.h> header declares thetimespec structure, which has the following members:

time_t tv_sec     /* seconds */long   tv_nsec     /* nanoseconds */

The <time.h> header declares theitimerspec structure, which has the following members:

struct timespec it_interval     /* timer period */struct timespec it_value     /* timer expiration */

The following manifest constants are defined:

CLOCK_REALTIME: The identifier of the system-wide realtime clock.
TIMER_ABSTIME: Flag indicating time is absolute. For functions taking timer objects, this refers to the clock associated with the timer.
CLOCK_MONOTONIC: The identifier for the system-wide monotonic clock, which is defined as a clock whose value cannot be set withclock_settime() and that cannot have backward clock jumps. The maximum possible clock jump is implementation-defined. Seeclock_settime(3C).

Theclock_t,size_t,time_t,clockid_t, andtimer_t types are defined as describedin <sys/types.h>. Seetypes.h(3HEAD).

Although the value ofCLOCKS_PER_SEC is required to be 1 million onall standard-conforming systems, it can be variable on other systems, and itshould not be assumed thatCLOCKS_PER_SEC is a compile-time constant.

The <time.h> header provides a declaration forgetdate_err.

The following are declared as variables:

extern int daylight;extern long timezone;extern char *tzname[];

Inclusion of the <time.h> header can make visible all symbols from the<signal.h> header.

Usage

The range [0,60] fortm_sec allows for the occasional leap second.

tm_year is a signed value; therefore, years before 1900 can be represented.

To obtain the number of clock ticks per second returned by thetimes() function, applications should callsysconf(_SC_CLK_TCK). Seetimes(2) andsysconf(3C).

Attributes

Seeattributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Committed
Standard	See`standards`(5).

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	man pages section 3: Library Interfaces and Headers Oracle Solaris 11 Information Library

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time.h

, time

Synopsis

Description

Usage

Attributes

See Also