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GNU
April 7, 1993

manpages-pt-dev

Portuguese Versions of the Manual Pages (dev sections)

manpages-dev

Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

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.
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