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 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.