NAME    [Toc]    [Back]

     nanosleep - high resolution sleep

SYNOPSIS    [Toc]    [Back]

     #include <time.h>

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

DESCRIPTION    [Toc]    [Back]

     nanosleep()  suspends  execution  of the calling process for
the time specified.
  An unmasked signal will cause  it  to  terminate  the
sleep early, regardless
 of the SA_RESTART value on the interrupting signal.

RETURN VALUES    [Toc]    [Back]

     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 -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).

ERRORS    [Toc]    [Back]

     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 million, or a second value less than
zero or
                   greater than 100 million.

     [ENOSYS]      nanosleep is not supported by this implementation.

SEE ALSO    [Toc]    [Back]

     sleep(3)

STANDARDS    [Toc]    [Back]

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

OpenBSD     3.6                          April      17,      1997