SLEEP(3)                            Linux Programmer's Manual                            SLEEP(3)



NAME
       sleep - sleep for the specified number of seconds

SYNOPSIS
       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION
       sleep()  makes  the  calling  thread  sleep until seconds seconds have elapsed or a signal
       arrives which is not ignored.

RETURN VALUE
       Zero if the requested time has elapsed, or the number of seconds left  to  sleep,  if  the
       call was interrupted by a signal handler.

CONFORMING TO
       POSIX.1-2001.

BUGS
       sleep()  may  be  implemented using SIGALRM; mixing calls to alarm(2) and sleep() is a bad
       idea.

       Using longjmp(3) from a signal handler or modifying the handling of SIGALRM while sleeping
       will cause undefined results.

SEE ALSO
       alarm(2), nanosleep(2), signal(2), signal(7)

COLOPHON
       This  page  is  part of release 3.74 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at http://www.kernel.org/doc/man-pages/.



GNU                                         2010-02-03                                   SLEEP(3)