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waterloo2005
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Joined: 26 Aug 2008
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PostPosted: Sat Jan 10, 2015 8:20 am    Post subject: How to auto start script as root under systemd ? Reply with quote

I remember it can be done in local.start of openrc.

How to do it under systemd ?

Then how to auto run script as waking from suspend ?

Thanks
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mv
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Joined: 20 Apr 2005
Posts: 6747

PostPosted: Sat Jan 10, 2015 9:18 am    Post subject: Reply with quote

It is one "design goal" of systemd to hinder you from running scripts.

Of course, it cannot hinder you to do it through a backdoor: Write something like such a unit
/etc/systemd/system/local-start-stop.service wrote:
[Unit]
Description=local start/stop script

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/sh /etc/init.d/local-start-stop.sh start
ExecStop=/bin/sh /etc/init.d/local-start-stop.sh stop

[Install]
WantedBy=multi-user.target
and make a corresponding script
/etc/init.d/local-start-stop.sh wrote:
#!/bin/sh
for file in /etc/local.d/*.${1}
do ! test -x "${file}" || "${file}"
done
After this enable the local-start-stop service. Concerning freeze, I would have to RTFM: Probably, there is a corresponding target, too.
Of course, you cannot be sure that your script is run after all services are started, because it can happen that there are services which are never started or only hours after booting.
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waterloo2005
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PostPosted: Tue Jan 13, 2015 3:10 am    Post subject: Reply with quote

mv wrote:
It is one "design goal" of systemd to hinder you from running scripts.

Of course, it cannot hinder you to do it through a backdoor: Write something like such a unit
/etc/systemd/system/local-start-stop.service wrote:
[Unit]
Description=local start/stop script

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/sh /etc/init.d/local-start-stop.sh start
ExecStop=/bin/sh /etc/init.d/local-start-stop.sh stop

[Install]
WantedBy=multi-user.target
and make a corresponding script
/etc/init.d/local-start-stop.sh wrote:
#!/bin/sh
for file in /etc/local.d/*.${1}
do ! test -x "${file}" || "${file}"
done
After this enable the local-start-stop service. Concerning freeze, I would have to RTFM: Probably, there is a corresponding target, too.
Of course, you cannot be sure that your script is run after all services are started, because it can happen that there are services which are never started or only hours after booting.


Thanks

Then how to auto run script as waking from suspend ?
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evetsnameloc
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Joined: 14 Dec 2014
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Location: Colorado Springs, CO

PostPosted: Fri Jan 16, 2015 5:31 pm    Post subject: Reply with quote

Place the script you want to run in /usr/lib/systemd/system-sleep. Systemd will run scripts in this folder on both suspend and resume. It passes two arguments to the scripts, the first being either "pre" or "post" depending on whether it is suspending or resuming, the second being "suspend", "hibernate" or "hybrid-sleep". So if you want to run a script only on waking from suspend, you will want a script something like
Code:
#!/bin/bash

if [ "$1" == "post" ]; then

   <do this>
        
fi

exit 0
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waterloo2005
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Joined: 26 Aug 2008
Posts: 271

PostPosted: Sat Jan 17, 2015 2:48 pm    Post subject: Reply with quote

evetsnameloc wrote:
Place the script you want to run in /usr/lib/systemd/system-sleep. Systemd will run scripts in this folder on both suspend and resume. It passes two arguments to the scripts, the first being either "pre" or "post" depending on whether it is suspending or resuming, the second being "suspend", "hibernate" or "hybrid-sleep". So if you want to run a script only on waking from suspend, you will want a script something like
Code:
#!/bin/bash

if [ "$1" == "post" ]; then

   <do this>
        
fi

exit 0


Thanks , it works .
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