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Full Discussion: Sleep command
Top Forums Shell Programming and Scripting Sleep command Post 302566731 by mandlysreedhar on Friday 21st of October 2011 03:16:33 AM
Old 10-21-2011
Sleep command
Hi All,

i am very new to shall script . i am not that much aware of sleep command ,
i want to terminate the sleep command after certain time.
following is my code.

Code:
while [ "$messag" ! ="P" ]
loop
sleep 1800
messag=/status.sql
done

the script will be on sleep untill the messag be comes P. here my requirement is . if the sleep function goes beyond 8 hours.. i want to come out from the sleep mode and i want to exit from the rest of the script.

for that i have written if statement. but.. is there any command with terminates the sleep mode after certain time.

Code:
while [ "$messag" != "P" ]
loop
 if [ $count -ge 10 ]
 then 
 exit 0;
    else 
  sleep 1800
messag=/status.sql
count=$[$count+1]
done

but my logic is wrong.. pls any one help me out from this problem


Thanks
Sree
Last edited by zxmaus; 10-21-2011 at 04:39 AM.. Reason: added code tags
 

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LEARN ABOUT CENTOS

systemd-sleep

SYSTEMD-SUSPEND.SERVICE(8)				      systemd-suspend.service					SYSTEMD-SUSPEND.SERVICE(8)

NAME

       systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-sleep - System sleep state logic

SYNOPSIS

       systemd-suspend.service

       systemd-hibernate.service

       systemd-hybrid-sleep.service

       /usr/lib/systemd/systemd-sleep

DESCRIPTION

       systemd-suspend.service is a system service that is pulled in by suspend.target and is responsible for the actual system suspend.
       Similarly, systemd-hibernate.service is pulled in by hibernate.target to execute the actual hibernation. Finally,
       systemd-hybrid-sleep.service is pulled in by hybrid-sleep.target to execute hybrid hibernation with system suspend.

       Immediately before entering system suspend and/or hibernation systemd-suspend.service (and the other mentioned units, respectively) will
       run all executables in /usr/lib/systemd/system-sleep/ and pass two arguments to them. The first argument will be "pre", the second either
       "suspend", "hibernate", or "hybrid-sleep" depending on the chosen action. Immediately after leaving system suspend and/or hibernation the
       same executables are run, but the first argument is now "post". All executables in this directory are executed in parallel, and execution
       of the action is not continued until all executables have finished.

       Note that scripts or binaries dropped in /usr/lib/systemd/system-sleep/ are intended for local use only and should be considered hacks. If
       applications want to be notified of system suspend/hibernation and resume, there are much nicer interfaces available.

       Note that systemd-suspend.service, systemd-hibernate.service, and systemd-hybrid-sleep.service should never be executed directly. Instead,
       trigger system sleep states with a command such as "systemctl suspend" or similar.

       Internally, this service will echo a string like "mem" into /sys/power/state, to trigger the actual system suspend. What exactly is written
       where can be configured in the "[Sleep]" section of /etc/systemd/sleep.conf. See systemd-sleep.conf(5).

OPTIONS

       systemd-sleep understands the following commands:

       -h, --help
	   Print a short help text and exit.

       --version
	   Print the systemd version identifier and exit.

       suspend, hibernate, hybrid-sleep
	   Suspend, hibernate, or put the system to hybrid sleep.

SEE ALSO

       systemd-sleep.conf(5), systemd(1), systemctl(1), systemd.special(7), systemd-halt.service(8)

systemd 208														SYSTEMD-SUSPEND.SERVICE(8)
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