Re: [asterisk-users] restart system from extension

[J Montoya or A J Stiles]

On Thursday 06 Apr 2017, Atux Atux wrote:
> hi. i would like to be able to reboot the system from my extension. is that
> possible? if yes, how?

It's possible, with something this in extensions.conf;

exten => 99,1,NoOp(Restarting server now)
exten => 99,n,System(shutdown -r now)

Then dial 99.

NB this is UNTESTED, for obvious reasons!  You probably do not want this 
extension to be in a context that anyone besides you can access.  And if you 
are not running Asterisk as root, then you will need to write a C wrapper 
around the shutdown binary and make it setuid root.


But just because it is possible, does not mean it is not a really, really 
terrible idea.  The real question is, WHY are you wanting to be able to reboot 
your server from your extension?  Because there is almost certainly a better 
way of achieving whatever it is that you are hoping to achieve.

-- 
JM or AJS

Note:  Originating address only accepts e-mail from list!  If replying off-
list, change address to asterisk1list at earthshod dot co dot uk .

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Re: [asterisk-users] restart system from extension

[Steve Edwards]

Please don't top post.


On Thu, Apr 06, 2017 at 08:16:34PM +0300, Atux Atux wrote:


hi. i would like to be able to reboot the system from my extension. is 
that possible? if yes, how?


Στις 6 Απρ 2017 8:25 μ.μ., ο χρήστης "Tzafrir Cohen" 
 έγραψε:



System('sudo /sbin/reboot')


On Thu, 6 Apr 2017, Atux Atux wrote:


Could you give some more details please?


While there may be many ways, sudo is the most obvious. I'd suggest 
sticking with it and learning it before researching other methods if you 
find a use case that sudo can't handle.


Sudo allows a user to run specific (or any) commands as another user. For 
example, allow the asterisk user to run a command as apache or root. This 
ability can be configured to run with or without a password.


If you're running Asterisk as root, which you shouldn't do, you don't need 
sudo since root can do almost everything.


If you're running Asterisk as asterisk, you can create a file named 
asterisk in /etc/sudoers.d/ that tells sudo what commands you want sudo to 
allow the user named asterisk, what user that command will be executed as, 
and if a password is needed. And more -- wade through 'man sudoers' for 
all the gory details.


In it's simplest form, which is not the most secure, this file would look 
like:


asterisk ALL=(ALL) NOPASSWD: ALL

This means the user asterisk can run all commands as any user on any host 
without needing a password. Kind of scary, right?


The best way to edit this file is with the 'visudo' command because it 
will help prevent you from creating an invalid file. This can be very 
important when you are editing your file (for your login) remotely.


You should take the time to create a 'sudoers' file for the asterisk user 
that allows the single '/sbin/reboot' command. Do as I say, not as I've 
done :)


--
Thanks in advance,
-
Steve Edwards   sedwa...@sedwards.com  Voice: +1-760-468-3867 PST
https://www.linkedin.com/in/steve-edwards-4244281-- 
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Re: [asterisk-users] restart system from extension

[Atux Atux]

Could you give some more details please?

Στις 6 Απρ 2017 8:25 μ.μ., ο χρήστης "Tzafrir Cohen" <
tzafrir.co...@xorcom.com> έγραψε:

> On Thu, Apr 06, 2017 at 08:16:34PM +0300, Atux Atux wrote:
> > hi. i would like to be able to reboot the system from my extension. is
> that
> > possible? if yes, how?
>
> System('sudo /sbin/reboot')
>
> You need to allow that in a sudoers file, of course. This may or may not
> be a good idea.
>
> There are a host of other methods to permit unplivilidged users /
> processes to run do specific priviliged actions.
>
> --
>Tzafrir Cohen
> +972-50-7952406   mailto:tzafrir.co...@xorcom.com
> http://www.xorcom.com
>
> --
> _
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> Check out the new Asterisk community forum at: https://community.asterisk.
> org/
>
> New to Asterisk? Start here:
>   https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>http://lists.digium.com/mailman/listinfo/asterisk-users
>
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Re: [asterisk-users] restart system from extension

[Tzafrir Cohen]

On Thu, Apr 06, 2017 at 08:16:34PM +0300, Atux Atux wrote:
> hi. i would like to be able to reboot the system from my extension. is that
> possible? if yes, how?

System('sudo /sbin/reboot')

You need to allow that in a sudoers file, of course. This may or may not
be a good idea.

There are a host of other methods to permit unplivilidged users /
processes to run do specific priviliged actions.

-- 
   Tzafrir Cohen
+972-50-7952406   mailto:tzafrir.co...@xorcom.com
http://www.xorcom.com

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[asterisk-users] restart system from extension

[Atux Atux]

hi. i would like to be able to reboot the system from my extension. is that
possible? if yes, how?
-- 
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