NAME
timespec_get – get current calendar time
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <time.h>
int
timespec_get(struct timespec *ts, int base);
DESCRIPTION
The timespec_get function sets the interval pointed to by ts to hold the current calendar time based on the specified time base in base.
The base TIME_UTC returns the time since the epoch. This time is expressed in seconds and nanoseconds since midnight (0 hour), January 1, 1970. In FreeBSD, this corresponds to CLOCK_REALTIME.
The base TIME_MONOTONIC returns a monotonically-increasing time since an unspecified point in the past. In FreeBSD, this corresponds to CLOCK_MONOTONIC.
RETURN VALUES
The timespec_get function returns the passed value of base if successful, otherwise 0 on failure.
SEE ALSO
clock_gettime(2), gettimeofday(2), time(3), timespec_getres(3)
STANDARDS
The timespec_get function with a base of TIME_UTC conforms to ISO/IEC 9899:2011 (“ISO C11”). The TIME_MONOTONIC base conforms to ISO/IEC 9899:2024 (“ISO C23”).
HISTORY
This interface first appeared in FreeBSD 12.
AUTHORS
Kamil Rytarowski ⟨[email protected]⟩ Warner Losh ⟨[email protected]⟩