sleep(3) Library Functions Manual sleep(3)Name
sleep - suspend execution for interval
Syntax
unsigned
sleep(seconds)
unsigned seconds;
Description
The current process is suspended from execution for the number of seconds specified by the argument. The actual suspension time may be up
to 1 second less than that requested, because scheduled wakeups occur at fixed 1-second intervals, and an arbitrary amount longer because
of other activity in the system.
The routine is implemented by setting an interval timer and pausing until it occurs. The previous state of this timer is saved and
restored. If the sleep time exceeds the time to the expiration of the previous timer, the process sleeps only until the signal would have
occurred, and the signal is sent 1 second later.
Return Values
The value returned by is the unslept amount(the requested time minus the time actually slept). This return value may be non-zero in cases
where the caller had an alarm set to go off earlier than the end of the requested time, or where was interrupted due to a caught signal(see
ENVIRONMENT below).
Environment
POSIX
SYSTEM_FIVE
When your program is compiled in POSIX or System V mode, the will be terminated by any caught signal. The function will return following
execution of the signal's catching routine.
See Alsosetitimer(2), sigpause(2)sleep(3)
Check Out this Related Man Page
sleep(3C)sleep(3C)NAME
sleep - suspend execution for an interval of time
SYNOPSIS
#include <unistd.h>
unsigned int sleep(unsigned int seconds);
The caller is suspended from execution for the number of seconds specified by the argument. The actual suspension time may be less than
that requested because any caught signal will terminate the sleep() following execution of that signal's catching routine. The suspension
time may be longer than requested by an arbitrary amount because of the scheduling of other activity in the system. The value returned by
sleep() will be the ``unslept'' amount (the requested time minus the time actually slept) if the caller incurred premature arousal because
of a caught signal.
The use of the sleep() function has no effect on the action or blockage of any signal. In a multithreaded process, only the invoking thread
is suspended from execution.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
nanosleep(3RT), attributes(5), standards(5)
16 Mar 2005 sleep(3C)
I am writing a program in C.
It is kind of a daemon process.
In this program, at the end of every 2 hours,
i need to fire an event. How can i achieve this
timer effect in my program? (1 Reply)
Dear All ,
I installed new Linux Red Hat 9 system and it is working fine .
but while i keep it for certain time ideal ( i mean ndo not wrok on system itself ) it goes to mode like sleep mode ,,, but while it is in sleep mode i can not ping it or telnet !!
i discovered it while i was telnet... (8 Replies)
Hi
I have a lot of scripts running on a Sun Solaris server, which are constantly running in a loop looking for work to do. When they have no work they sleep for a certain amount of time (60secs normally). I have 13 of these scripts running the number of sleep command issued can be in the order... (4 Replies)
Hi,
How can I print the time in seconds(only). I have get the execution time of a script. Now I want the duration in seconds. How can I do it?
Thanks in advance (4 Replies)
Hi
I've stumbled over something that caught my attention but I'm not familiar enough with IPs to know if this is suspect or irrelevant. If you'd take the time to read and respond I'd greatly appreciate it. I'm just stumped.
I've done a site for some people (4 in the group) awhile ago and set... (4 Replies)
Hi all,
do ny o u'll know how to set a particular execution time for a program???
for eg.:
--> during the execution of a file, i call a certain other function.
--> while calling this function, my comp hangs.
now is there ny way in which i can go to the nxt line of code by aborting the call... (7 Replies)
Hi Forum
Im using sleep in a while loop goes around 10 times. i feed it a variable with the time i what it to sleep for eg sleep $sleepVal and then print system date and time to screen but sometimes 1 second is added to the time why is this
here my code
sleepVal=5
while
do
... (3 Replies)
Hi ,
I am working on a Solaris server which goes to sleep mode if idle for more than 30 min. I have a remote access so that I can access the server from my home too. By the time I go back to my room, it is going to sleep mode so I could see nothing but a black screen. Is there any option to... (3 Replies)
I am scheduling a task at regular intervals at seconds acuracy using crond and sleep command . my data in crontab file is as below:-
the above line is working fine when we are creating this crontab file before 00:05 min .
But when we are creating the crontab file at 00:05min , unable to... (10 Replies)
Hi Experts,
I am facing one problem here which is one process always stuck in running state which causes the other similar process to sleep state . This causes my system in hanged state.
On doing cat /proc/<pid>wchan showing the "__init_begin" in the output.
Can you please help me here... (6 Replies)
Hello all,
I've a small script where it checks for the existence of a particular file and sleeps for 5 seconds if it doesn't exist. I would like to send the sleep output to background so that I don't see so many sleep messages in the build output.
#!/bin/sh -x
until
do
sleep 3
done
echo... (17 Replies)
I have 2 files that print on the same line at the same time. I wanted to add time.sleep() to 1 of the textfiles. I wanted to delay the time that 1 textfile prints with the other 1 in this script. I wanted to have the files to create new lines instead of printing the same combinations when they both... (5 Replies)