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.
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)