qwurx [shmem] ~> strace -e trace=nanosleep perl -e 'sleep 1'
nanosleep({1, 0}, 0x7ffe9dc8df90)       = 0
+++ exited with 0 +++
qwurx [shmem] ~> strace -e trace=nanosleep perl -e 'sleep 0.123456'
+++ exited with 0 +++
qwurx [shmem] ~> strace -e trace=nanosleep perl -e 'sleep -1'
nanosleep({4294967295, 0}, ^CProcess 27923 detached
 <detached ...>
qwurx [shmem] ~> strace -e trace=nanosleep perl -e 'sleep 3.1415926'
nanosleep({3, 0}, 0x7ffed4b7b6a0)       = 0
+++ exited with 0 +++
qwurx [shmem] ~> strace -e trace=select perl -e 'select $u,$u,$u, 3.1415926'
select(0, NULL, NULL, NULL, {3, 141592}) = 0 (Timeout)
+++ exited with 0 +++
qwurx [shmem] ~> strace -e trace=select perl -e 'select $u,$u,$u, -3.1415926'
select(0, NULL, NULL, NULL, {0, 0})     = 0 (Timeout)
+++ exited with 0 +++

##</code><code>##

struct timeval
  {
    __time_t tv_sec;            /* Seconds.  */
    __suseconds_t tv_usec;      /* Microseconds.  */
  };