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sleep(3) -- Linux man page
NAME
sleep - Sleep for the specified number of seconds
SYNOPSIS
#include <unistd.h>
unsigned int sleep(unsigned int seconds);
DESCRIPTION
sleep()
makes the current 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
BUGS
sleep()
may be implemented using
SIGALRM;
mixing calls to
alarm()
and
sleep()
is a bad idea.
Using
longjmp()
from a signal handler or modifying the handling of
SIGALRM
while sleeping will cause undefined results.
SEE ALSO
signal(2),
alarm(2)
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