pmpause man page

$PCP_BINADM_DIR/pmpause
$PCP_BINADM_DIR/pmsleep interval

pmpause sleeps indefinitely, until interrupted by SIGKILL.

pmsleep sleeps for the specified interval. The interval argument follows the syntax described in PCPIntro(1) for -t, and in the simplest form may be an unsigned integer  or floating point constant  (the implied units in this case are seconds).

The exit status is 0 for success, or 1 for a malformed command line. If the underlying nanosleep(2) system call fails, an errno is returned.

sleep(1), pause(2) and nanosleep(2).