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NetBSD 6.1.5 - man page for nanosleep (netbsd section 2)

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NANOSLEEP(2)			     BSD System Calls Manual			     NANOSLEEP(2)

     nanosleep -- high resolution sleep

     Standard C Library (libc, -lc)

     #include <time.h>

     nanosleep(const struct timespec *rqtp, struct timespec *rmtp);

     The nanosleep() suspends execution of the calling process until either the number of seconds
     and nanoseconds specified by rqtp have elapsed or a signal is delivered to the calling
     process and its action is to invoke a signal catching function or to terminate the process.
     The suspension time may be longer than requested due to the scheduling of other activity by
     the system.  The struct timespec is described in timespec(3).

     If the nanosleep() function returns because the requested time has elapsed, the value
     returned will be zero.

     If the nanosleep() function returns due to the delivery of a signal, the value returned will
     be the -1, and the global variable errno will be set to indicate the interruption.  If rmtp
     is non-NULL, the timespec structure it references is updated to contain the unslept amount
     (the request time minus the time actually slept).

     If any of the following conditions occur, the nanosleep function shall return -1 and set
     errno to the corresponding value.

     [EFAULT]		Either rqtp or rmtp points to memory that is not a valid part of the
			process address space.

     [EINTR]		nanosleep was interrupted by the delivery of a signal.

     [EINVAL]		rqtp specified a nanosecond value less than zero or greater than 1000

     [ENOSYS]		nanosleep is not supported by this implementation.

     sleep(3), timespec(3)

     The nanosleep() function conforms to IEEE Std 1003.1b-1993 (``POSIX.1'').

BSD					   May 17, 2010 				      BSD
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