itimerspec(3type)                                            itimerspec(3type)

NAME
       itimerspec - interval for a timer with nanosecond precision

LIBRARY
       Standard C library (libc)

SYNOPSIS
       #include <time.h>

       struct itimerspec {
           struct timespec  it_interval;  /* Interval for periodic timer */
           struct timespec  it_value;     /* Initial expiration */
       };

DESCRIPTION
       Describes the initial expiration of a timer, and its interval, in
       seconds and nanoseconds.

STANDARDS
       POSIX.1-2024.

HISTORY
       POSIX.1-1996.

SEE ALSO
       timerfd_create(2), timer_settime(2), timespec(3type)

Linux man-pages 6.19              2026-01-08                 itimerspec(3type)