спать на указанное количество секунд (sleep for a specified number of seconds)
Имя (Name)
sleep - sleep for a specified number of seconds
Синопсис (Synopsis)
#include <unistd.h>
unsigned int sleep(unsigned int seconds);
Описание (Description)
sleep() causes the calling thread to sleep either until the
number of real-time seconds specified in seconds have elapsed or
until a signal arrives which is not ignored.
Возвращаемое значение (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.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────┬───────────────┬─────────────────────────────┐
│Interface │ Attribute │ Value │
├──────────────────┼───────────────┼─────────────────────────────┤
│sleep() │ Thread safety │ MT-Unsafe sig:SIGCHLD/linux │
└──────────────────┴───────────────┴─────────────────────────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Примечание (Note)
On Linux, sleep() is implemented via nanosleep(2). See the
nanosleep(2) man page for a discussion of the clock used.
Portability notes
On some systems, sleep() may be implemented using alarm(2) and
SIGALRM (POSIX.1 permits this); 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.
Смотри также (See also)
sleep(1), alarm(2), nanosleep(2), signal(2), signal(7)
