...making Linux just a little more fun!
J.Bakshi [j.bakshi at icmail.net]
Hi list,
Hope you all are well.
I am trying to modify the /etc/inittab file to add more key combination. One of the reasons is to shut down the system. I have added this line in the inittab
~~~~~~~~~~~~~~~~~~~~~~~~~~~` #shut down wit ctrl+alt+end ce:12345:ctrlaltend:/sbin/halt ~~~~~~~~~~~~~~~~~~~~~~
but "init q" reports
:ctrlaltend: unknown action field
Could any one kindly point out my mistake ? I like to define some more key combination like ctrl+alt+< ; ctrl+alt+s etc to call commands. How can I define these key combination ?
Thanks
Kapil Hari Paranjape [kapil at imsc.res.in]
Hello,
On Sat, 01 Nov 2008, J.Bakshi wrote:
> but "init q" reports > > :ctrlaltend: unknown action field > > Could any one kindly point out my mistake ? I like to define some more key > combination like ctrl+alt+< ; ctrl+alt+s etc to call commands. How can I > define these key combination ?
The ctrl+alt+del key combination is specially handled by the console driver. In response to this key combination the kernel sends the signal SIGINT to process 1 (which is usually "init).
In addition to this, according to the man page of "inittab", the kernel also sends a signal (which signal?) to process 1 ("init") when it processes a key which is assigned to "KeyboardSignal". So you can use your keymap to define a key combination which works for that.
Regard,
Kapil. --
J.Bakshi [j.bakshi at icmail.net]
On Saturday 01 Nov 2008 1:46:12 pm Kapil Hari Paranjape wrote:
> Hello,
>
> On Sat, 01 Nov 2008, J.Bakshi wrote:
> > but "init q" reports
> >
> > :ctrlaltend: unknown action field
> >
> > Could any one kindly point out my mistake ? I like to define some more
> > key combination like ctrl+alt+< ; ctrl+alt+s etc to call commands. How
> > can I define these key combination ?
>
> The ctrl+alt+del key combination is specially handled by the console
> driver. In response to this key combination the kernel sends the signal
> SIGINT to process 1 (which is usually "init).
>
> In addition to this, according to the man page of "inittab", the
> kernel also sends a signal (which signal?) to process 1 ("init") when it
> processes a key which is assigned to "KeyboardSignal". So you can use
> your keymap to define a key combination which works for that.
Hello Kapil,
Many thanks for the discussion. How can I get the information of keymap and how to define it in inittab ?
Thanks once again
Kapil Hari Paranjape [kapil at imsc.res.in]
Hello,
On Sat, 01 Nov 2008, J.Bakshi wrote:
> On Saturday 01 Nov 2008 1:46:12 pm Kapil Hari Paranjape wrote: > > In addition to this, according to the man page of "inittab",
> Many thanks for the discussion. How can I get the information of keymap and > how to define it in inittab ?
Have a look at "man inittab".
Kapil. --
Kapil Hari Paranjape [kapil at imsc.res.in]
Hello,
I missed this part when I wrote my earlier reply.
On Sat, 01 Nov 2008, J.Bakshi wrote:
> I like to define some more key combination like ctrl+alt+< ; > ctrl+alt+s etc to call commands.
I don't think it is a good idea to call all kinds of commands by getting the kernel to signal "init" to run them.
The "ctrlaltdel", "kbrequest" and alt+sysrq facilities are given for use in emergency situations where user-space applications will not suffice.
Emergency requirements are the only case when such facilities should be used. "Never use a diving tackle when you can tell a person to stop."
Kapil. --