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 process 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.

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), signal(2)

COLOPHON
This page is part of release 2.79 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/.