Hi Sri, On Sun, Sep 12, 2010 at 10:02 AM, Sri Ram Vemulpali <[email protected]> wrote: > Hi Guys, > This is the question asked by WindRiver.com in interview. > Question: A process has 5 children. Process child 5 is trying to send > signal (some signal) to Child 2 and Child 3. Calls signal(2,SIG), > signal(3,SIG). Now the question is, How are the signals delivered, I mean > their order and which child process gets the signal first.
It is my understanding that signals are delivered when a process makes the kernel-space to user-space transition (say on a system call). So which one will be called first depends on which child makes the next system call. > I know that if you use real time signals they are delivered in order and > accounts for number of times signals are delivered, this is in threads. But > when it comes process, a process can not send signals to its own group in > linux kernel. > So can anyone please clarify this, what is the right scenario. I'm not familiar enough with the distinctions to provide any more detail here. I don't see any reason why a process can't signal itself, but this is just an opinion, not backed up by any fact or experiment. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
