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sleep(3)
NAME
  sleep - Suspends execution for an interval of time

LIBRARY
  Standard C Library (libc.a)
  Threads Library (libpthreads.a)

SYNOPSIS
  #include <unistd.h>

  unsigned int sleep (
	  unsigned int seconds );

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  sleep():  XPG4, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  seconds   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.

RELATED INFORMATION
  Commands: wall(1), shutdown(8) sleep(1)

  Functions: sigaction(2), alarm(3), pause(3)

  Standards: standards(5)

Index for Section 3

Alphabetical listing for S

Top of page