NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON

SLEEP(3)                  Linux Programmer's Manual                 SLEEP(3)

NAME         top

       sleep - sleep for the specified number of seconds

SYNOPSIS         top

       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION         top

       sleep() makes the calling thread sleep until seconds seconds have
       elapsed or a signal arrives which is not ignored.

RETURN VALUE         top

       Zero if the requested time has elapsed, or the number of seconds left
       to sleep, if the call was interrupted by a signal handler.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────┬───────────────┬─────────────────────────────┐
       │Interface Attribute     Value                       │
       ├──────────┼───────────────┼─────────────────────────────┤
       │sleep()   │ Thread safety │ MT-Unsafe sig:SIGCHLD/linux │
       └──────────┴───────────────┴─────────────────────────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

BUGS         top

       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         top

       sleep(1), alarm(2), nanosleep(2), signal(2), signal(7)

COLOPHON         top

       This page is part of release 4.08 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                              2016-03-15                         SLEEP(3)