Section 3 · Library functions

time_t.3type

Package: man-pages

time_t

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
STANDARDS
HISTORY
NOTES
SEE ALSO

NAME

time_t, suseconds_t, useconds_t − integer time

LIBRARY

Standard C library (libc)

SYNOPSIS

#include <time.h>

typedef /* … */ time_t;

#include <sys/types.h>

typedef /* … */ suseconds_t;
typedef /* … */ useconds_t;

DESCRIPTION


	time_t		Used for time in seconds. According to POSIX, it is an integer type.

suseconds_t

Used for time in microseconds. It is a signed integer type capable of storing values at least in the range [−1, 1000000].

useconds_t

Used for time in microseconds. It is an unsigned integer type capable of storing values at least in the range [0, 1000000].

STANDARDS


	time_t		C11, POSIX.1-2008.

suseconds_t
useconds_t

POSIX.1-2008.

HISTORY


	time_t		C89, POSIX.1-2001.

suseconds_t
useconds_t

POSIX.1-2001.

<sched.h> defines time_t since POSIX.1-2008.

POSIX.1-2001 defined useconds_t in <unistd.h> too.

NOTES

On some architectures, the width of time_t can be controlled with the feature test macro _TIME_BITS. See feature_test_macros(7).

The following headers also provide time_t: <sched.h>, <sys/msg.h>, <sys/select.h>, <sys/sem.h>, <sys/shm.h>, <sys/stat.h>, <sys/time.h>, <sys/types.h>, and <utime.h>.

The following headers also provide suseconds_t: <sys/select.h> and <sys/time.h>.