time_t - Online Linux Manual PageSection : 3type
Updated : 2022-10-30
Source : Linux man-pages 6.03

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NAMEtime_t, suseconds_t, useconds_t − integer time

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LIBRARYStandard C library (libc)

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SYNOPSIS#include <time.h>typedef /* ... */ time_t;#include <sys/types.h>typedef /* ... */ suseconds_t; typedef /* ... */ useconds_t;

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DESCRIPTIONtime_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 al least in the range [−1, 1000000]. useconds_t  Used for time in microseconds. It is an unsigned integer type capable of storing values al least in the range [0, 1000000].

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VERSIONStime_t  <sched.h> defines time_t since POSIX.1-2008. suseconds_t  POSIX.1-2001 defined useconds_t in <unistd.h> too.

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STANDARDStime_t: C99 and later; POSIX.1-2001 and later. suseconds_t, useconds_t: POSIX.1-2001 and later.

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NOTESOn some architectures, the width of time_t can be controlled with the feature test macro _TIME_BITS. time_t  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>. suseconds_t  The following headers also provide suseconds_t: <sys/select.h> and <sys/time.h>.

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SEE ALSOstime(2), time(2), ctime(3), difftime(3), usleep(3), timeval(3type) 0

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