Are there any examples

[dirvine]

Hi, a brave library to implement, good luck with it, we need it in boost.

I am looking for such a lib but found what must be a different version that did have examples, most of which appear to have some issues. Is this lib active ? and are there examples ?

[JeffFlinn]

Hello,

Yes, I'm working on the lib as time permits. As you say, doing a portable
process library properly is difficult primarily due to the posix side of
things with all it's limitations on legal code between fork/exec. I'm
digesting a recent thread on the unix newsgroup.

There were several versions and attempts at a boost process library in the
past. Mine on github was presented at boostcon 2011 in an attempt to
address many of the issues raised.

If you provide a command line that you would like to see implemented using
the latest boost process, I can give you the appropriate code to accomplish
the same. In the meantime, I'll try to further flesh out docs.

Thanks, Jeff

On Thu, Jun 14, 2012 at 5:38 PM, dirvine <
reply@reply.github.com

wrote:

Hi, a brave library to implement, good luck with it, we need it in boost.

I am looking for such a lib but found what must be a different version
that did have examples, most of which appear to have some issues. Is this
lib active ? and are there examples ?

---

Reply to this email directly or view it on GitHub:
#1

[dirvine]

Hi Jeff, many thanks for the reply. What I am trying to accomplish basically is a small utility that starts and runs some children and optionally restarts these on failure (or non zero return). I knocked together a small example in this gist https://gist.github.com/2948621

This works to an extent but

The problem is
1: wait is blocking (ok workaround with wait on a thread)
2: Child has no default ctr (so cannot be used as a type in a struct, I hacked the child.hpp a wee bit to achieve this)
3: In the gist you will see in the following I tried to create a child and copy it to a struct and then run a thread that waits on the child (it's a little convoluted). If I then try to terminate the child all sorts of bad things happen (whole program crash).

What I would like
1: Be able to watch processes in a better async way if possible (but happy enough to stick with threads if need be)
2: Be able to terminate a child (even forcefully if necessary)

I hope this helps a little and again great work!! I would love to have time to help you, but at least we can check code on several platforms and compilers of that helps

void ProcessManager::RunProcess(int32_t id) {
auto i = FindProcess(id);
if (i == processes_.end())
return;
bp::context ctx;
ctx.environment = bp::self::get_environment();
bp::child c = bp::launch((_i).process.ProcessName(), (_i).process.Args(), ctx);
(_i).child = c;
c.wait();
if (! (_i).done)
RunProcess(id);
}