pipe for stderr and stdout

[Ivan Novick]

Hi,

From within perl i want to start a first process 'A' which writes to
both STDOUT and STDERR.

From the same perl script i want to start 2 more processes.

One, 'B', that reads from STDOUT of 'A"

The other, 'C', that reads from STDERR 'A'

Is this possible from within perl?

Thanks,
Ivan Novick
http://www.myperlquiz.com/

 

[Gunnar Hjalmarsson]

From within perl i want to start a first process 'A' which writes to
both STDOUT and STDERR.

From the same perl script i want to start 2 more processes.

One, 'B', that reads from STDOUT of 'A"

The other, 'C', that reads from STDERR 'A'

Is this possible from within perl?

Yes.

 

[Ivan Novick]

Yes.

How about a hint as to how?

Ivan Novick
http://www.myperlquiz.com/

 

[Gunnar Hjalmarsson]

How about a hint as to how?

I'm not able to tell you any details, but I'd study "perldoc perlipc"
and "perldoc perlfork" and start playing with code.

 

[Ted Zlatanov]

IN> From within perl i want to start a first process 'A' which writes to
IN> both STDOUT and STDERR.

IN> From the same perl script i want to start 2 more processes.

IN> One, 'B', that reads from STDOUT of 'A"

IN> The other, 'C', that reads from STDERR 'A'

IN> Is this possible from within perl?

I believe it's possible with IPC::Run, which has pretty much every way
of running a program and capturing its output I ever needed. I can't
give you the exact solution but you'll see very relevant examples in the
first pages of the module's documentation (especially feeding one
child's output to another). You can install IPC::Run from CPAN.

Ted