Re: Sending signals to user space program from kernel space

[jean-francois simon <jfs@xxxxxxxxxx>]

how about kill_proc:


like in
kill_proc(pid,  SIGUSR1, 1);

for example.

-jfs



Paraneetharan Chandrasekaran wrote:
> Hi,
>               You can write a netlink socket interface between your char
> driver and userspace program. User space program can be made to wait in
> "recvfrom" system call. Whenever even number comes in "i", a netlink
> messages can be send to user space program.
>  
> -- Paraneetharan C
> 
> 2009/2/3 Sandeep K Sinha <sandeepksinha@xxxxxxxxx
> <mailto:sandeepksinha@xxxxxxxxx>>
> 
>     On Tue, Feb 3, 2009 at 6:59 AM, Pei Lin <telent997@xxxxxxxxx
>     <mailto:telent997@xxxxxxxxx>> wrote:
>     > why not use copy_from_user and copy_to_user?
>     >
> 
>     DIdn't understand what you meant, but the question is regarding a
>     signal not data?
>     Am I missing something ???
> 
>     > 2009/2/1 Sandeep K Sinha <sandeepksinha@xxxxxxxxx
>     <mailto:sandeepksinha@xxxxxxxxx>>:
>     >> Write a daemon in userspace which runs in background and continuously
>     >> send ioctl's to your driver and gets the value of i.
>     >> If the value of i becomes even, you can write your desired code.
>     >>
>     >> Is this what you wanted ?
>     >>
>     >> On Sat, Jan 31, 2009 at 2:53 PM, rishi agrawal
>     <postrishi@xxxxxxxxx <mailto:postrishi@xxxxxxxxx>> wrote:
>     >>> Hello Everyone,
>     >>>
>     >>> I have a char device which when gets ioctl  case 'a' starts a
>     for loop with
>     >>> index ' i '.
>     >>>
>     >>> I want to send the value of index ' i ' to user space whenever '
>     i ' is
>     >>> even.
>     >>>
>     >>> I want some thing like the kernel space code of char device
>     should send a
>     >>> variable and also a 'signal' that it has send a value.
>     >>>
>     >>> How can it be done ?
>     >>>
>     >>> Its something like Pipes
>     >>>
>     >>> --
>     >>> Regards,
>     >>> Rishi B. Agrawal
>     >>>
>     >>>
>     >>
>     >>
>     >>
>     >> --
>     >> Regards,
>     >> Sandeep.
>     >>
>     >>
>     >>
>     >>
>     >>
>     >>
>     >> "To learn is to change. Education is a process that changes the
>     learner."
>     >>
>     >> --
>     >> To unsubscribe from this list: send an email with
>     >> "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
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>     >> Please read the FAQ at http://kernelnewbies.org/FAQ
>     >>
>     >>
>     >
> 
> 
> 
>     --
>     Regards,
>     Sandeep.
> 
> 
> 
> 
> 
> 
>     "To learn is to change. Education is a process that changes the
>     learner."
> 
>     --
>     To unsubscribe from this list: send an email with
>     "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
>     <mailto:ecartis@xxxxxxxxxxxx>
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> 
> 


-- 

Best regards,
_______________________________________
jean-francois simon - themis computer
5, rue irene joliot curie
38320 eybens - france
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