On Mon, 21 Mar 2016 10:33:44 +0530, Nitin Varyani said: > Sub-task 1: Until now, parent process cannot control the pid of the forked > child. A pid gets assigned as a sequential number by the kernel at the time > the process is forked . I want to modify kernel in such a way that parent > process can control the pid of the forked child.
What does controlling the pid gain you? To what purpose? > Sub-task 2: On Linux, you can find the maximum PID value for your system > with the following command: > > $ cat /proc/sys/kernel/pid_max > > Suppose pid_max=2000 for a system. I want that the parent process should be > able to assign a pid which is greater that 2000 to the forked child. Again, why would you want to do that? Anyhow... echo 3000 > /proc/sys/kernel/pid_max fork a process that gets a pid over 2000. Done. Note that on 32 bit systems, using a pid_max of over 32768 will cause various things in /proc to blow up. I suspect that you need to think harder about what problem you're actually trying to solve here - what will you do with a controlled child PID? Why does it even matter?
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