usleep - suspend execution for interval of microseconds
Standard C Library (libc, -lc)
The usleep() function suspends execution of the calling process until
either the number of microseconds specified by microseconds 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 microseconds argument must be less than 1,000,000. If the value of
microseconds is 0, then the call has no effect.
On successful completition, usleep() returns 0. Otherwhise, it returns
-1 and sets errno to indicate the error.
The usleep() function may fail if:
[EINVAL] The microseconds interval specified 1,000,000 or more
The usleep() function conforms to X/Open Portability Guide Issue 4.2
The usleep() function appeared in 4.3BSD.
BSD June 4, 1993 BSD
[ Back ]