[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Sending signals to user space program from kernel space
Reference signal.c
int send_sig(int sig, struct task_struct *p, int priv)
may be your need.
2009/2/3 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
>> <mailto:ecartis@xxxxxxxxxxxx>
>> >> 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>
>> Please read the FAQ at http://kernelnewbies.org/FAQ
>>
>>
>
>
> --
>
> Best regards,
> _______________________________________
> jean-francois simon - themis computer
> 5, rue irene joliot curie
> 38320 eybens - france
> +33 (0)4 76 14 77 85 - www.themis.com
>
>
>
>
--
To unsubscribe from this list: send an email with
"unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
Please read the FAQ at http://kernelnewbies.org/FAQ