Re: [Boost-users] [process] Couple of issues

Subject: Re: [Boost-users] [process] Couple of issues
From: JF (krabicezpapundeklu_at_[hidden])
Date: 2018-01-02 09:58:15

Hi,

1. Use "bp::child c(bp::search_path("ping"), "127.0.0.1", "-t", bp::std_out
> is);"
2. I'm on Windows, Boost 1.66, VS2017 and output is generated. (With your
original code: "Ping request could not find host 127.0.0.1 -t. Please check
the name and try again.")

J

2018-01-02 10:15 GMT+01:00 Sebastian Messerschmidt via Boost-users <
boost-users_at_[hidden]>:

> Hi,
>
> I'm using boost 1.64 on Windows7 with VisualStudio 2015 64bit.
> While testing boost.process I've encountered some issues that I'm not able
> to resolve:
>
> 1. Passing of multiple parameters:
>
> Consider this minimal example:
>
> <code>
> void test_sync()
> {
>         try
>         {
>                 bp::ipstream is;
>                 bp::child c(bp::search_path("ping"), "127.0.0.1 -t",
> bp::std_out > is);
>                 std::string line;
>                 while (c.running() && std::getline(is, line) &&
> !line.empty())
>                 {
>                         std::cerr << line << std::endl;
>                 }
>                 c.wait();
>         }
>         catch (const std::exception& e)
>         {
>                 std::cerr << "Error in execution: " << e.what();
>         }
> }
> </code>
>
> This doesn't correctly execute "ping 127.0.0.1 -t", instead it will act
> like "ping 127.0.0.1". I could not find an up2date example on how to pass
> parameters correctly. Any ideas?
>
> 2. No output on std::cout
> It seems that some applications don't output to std::cout/clog/cerr but
> somehow via printing to console directly (my guess as it is colored output
> on windows)
> In those instances, redirection fails. Can anyone think of a way to still
> monitor the output of the spawned child?
>
> Cheers
> Sebastian
>
>
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