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1.9.3.sleep() #
NAME
sleep – suspend execution for interval
SYNOPSIS
#include <sys.h>
- unsigned sleep(unsigned seconds );
DESCRIPTION
The current thread is suspended from execution for the number of seconds specified by the argument. The actual suspension time may be less than that requested because any caught signal will terminate the sleep() following execution of that signal’s catching routine. Also, the suspension time may be longer than requested by an arbitrary amount because of the scheduling of other activity in the system.
RETURN VALUES
Always returns 0 on success but may return -1 if timer not setup.
ERRORS
- EINVAL
- The named timer does not exist due to initialization problems.