Hmm....
I do not think so.
In user space, I have a fork test, but the result is that the parent and
child process are in the same process group.
When you call fork to create a child process, you can use setpgid to
specify the group id of the newly created child
process in both the parent process and the child process.
On Dec 29, 2008 5:27am, Frederic Weisbecker <fweis...@gmail.com> wrote:
On Mon, Dec 29, 2008 at 01:49:18AM +0530, Shyam Burkule wrote:
> Hello,
> I am sorry for asking silly question.
>
> In windows basic execution unit is thread, and Linux does not
> differentiate between thread and process( I mean Linux doesn't give
special
> treatment for thread essentially they are normal process except they
share
> some resource with other process). If I use fork to create process, does
> it create thread that run in the same thread group as parent run or
does it
> create another standalone process?
>
> Fork system call is equivalent to clone(SIGCHLD,0, so I think fork
create
> new standalone process.
>
> Please clarify.
>
> ~Shyam
Hi Shyam,
Actually, all is about tasks. For the kernel, process, thread, whatever,
they are all tasks.
When you create a process, you create a task (which is one thread).
When you create a new secondary thread in this process, you create a new
task too. We could perhaps consider it as a "subtask" but it has its own
task_struct.
Inside a same process, the threads belong to the same thread group.
And when you create a new process (fork), you create a new task but not
in the same thread group.
Hmm?
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