Thread: Help with "system" command

Hi all,
I am using to "system" command to call another executable from my program. The executable I call generates some messages that are not of interest to me. Is there any way to supress these messages? For example, I mean I don't want the messages displayed by the executable to be visible on the console window of my program.

Thanks,
Raj

http://faq.cprogramming.com/cgi-bin/...&id=1043284392

Treenef,
Thanks for the reply but, that does not answer my question.

In the sample code in link you provided, the child process always displays "I am a child" in all the methods. I don't want that message to be displayed.

I need that because, I don't have the control over the child code (it is like 90,000 lines and I'm not comfortable messing with it...)

Regards,
Raj

Like all FAQ's, it's a (big) hint in the right direction, not a precise answer to your very specific problem.

> the child process always displays "I am a child"
Try reading more than the first program listed.
That program is an EXAMPLE child - replace it (or rather it's executable) with whatever problem you have.

Salem,
I know that is an example, the gist of question is: if the child process (executable) generates some messages, I don't want to see them. I just want to see the messages generated by my program (parent) program. As I mentioned in the previous post, I have no control over the executable.

Thanks.

You could pipe the output to someplace other than stdout. Assuming you under a MS OS, you would type this in at the command-line:

Code:

C:\> myprogram > output.txt

if using MS-Windows os you can use CreateProcess() instead of system(), which will allow you to create a process without a window. Nobody will see any text output from the program created.

Something crude like this, which directs stdout and stderr to the bit bucket?

system( "prog.exe 1>NUL 2>NUL" );

Actually, that would work under *NIX, too

Ah.. Thank you. I was confusing > with |