sleep(3)sleep(3)NAMEsleep - Suspend execution for an interval of time
SYNOPSIS
#include <unistd.h>
unsigned int sleep(
unsigned int seconds );
LIBRARY
Standard C Library (libc)
Threads Library (libpthreads.a)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
sleep(): XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Specifies the number of seconds to sleep.
DESCRIPTION
The sleep() function suspends execution of a process for the interval
specified by the seconds parameter. The suspension time may be longer
than requested due to the scheduling of other activity by the system.
In a multi-threaded environment, the sleep() function is redefined so
that only the calling thread is suspended.
RETURN VALUES
If the sleep() function returns because the requested time has elapsed,
it returns 0 (zero). If the sleep() function returns because it caught
a signal, the function returns the number of seconds remaining in the
suspension.
SEE ALSO
Commands: wall(1), shutdown(8)sleep(1)
Functions: sigaction(2), alarm(3), pause(3)
Standards: standards(5)sleep(3)
