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-   -   send signal to privileged application from unprivileged application (https://www.linuxquestions.org/questions/programming-9/send-signal-to-privileged-application-from-unprivileged-application-482763/)

aral 09-12-2006 10:38 AM
send signal to privileged application from unprivileged application
 
I tried to send a signal from an application running as normal user to an application running as root and obviously the application running as root didn't get the signal (it had a signal handler for it ). What can I change in order for the root application to get the signal ? I sent the signal using kill(pid, signumber) and I used SIGUSR1 for sig number .. Can anyone help me ?

aral 09-14-2006 04:55 AM
does anyone know ?

aral 09-20-2006 07:55 AM
Please, I really need this !

aral 09-22-2006 09:48 AM
Is this really so difficult ? I've imagined I'm the only one who doesn't know such simple things ..

Matir 09-22-2006 10:00 AM
Have you read the kill(2) manpage?
Quote:
For a process to have permission to send a signal it must either be
privileged (under Linux: have the CAP_KILL capability), or the real or
effective user ID of the sending process must equal the real or saved
set-user-ID of the target process. In the case of SIGCONT it suffices
when the sending and receiving processes belong to the same session.

aral 10-27-2006 12:34 PM
So , what's the definition of "session" which the manual mentiones when it says : "when the sending and receiving processes belong to the same session " ?


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