Linux cli command sleep

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command sleep and provides detailed information about the command sleep, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the sleep.

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NAME 🖥️ sleep 🖥️

sleep for a specified number of seconds

LIBRARY

Standard C library (libc, -lc)

SYNOPSIS

#include <unistd.h>
unsigned int sleep(unsigned int seconds);

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.

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.

ATTRIBUTES

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

InterfaceAttributeValue

sleep()

Thread safetyMT-Unsafe sig:SIGCHLD/linux

VERSIONS

On Linux, sleep() is implemented via nanosleep(2). See the nanosleep(2) man page for a discussion of the clock used.

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.

STANDARDS

POSIX.1-2008.

HISTORY

POSIX.1-2001.

CAVEATS

Using longjmp(3) from a signal handler or modifying the handling of SIGALRM while sleeping will cause undefined results.

SEE ALSO

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

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