printf to different console

[kuhiomall]

I would like to create a thread and pipe all "printf" to a new terminal (kconsole or xterm) mean time the main program stays in different kconsole for more user inputs. Can you please help where I should start??

Thanks in advance.

[wje_lf]

Is it necessary that this be a thread, or can it be a different process?

And which programming language are you using?

[kuhiomall]

I am using C code. I would like to do it w/ threads.
If not, then I will try process.
Any answer will be appreciated!!

[wje_lf]

I presume you want to use printf() calls as they are now, without modifying them.

Try this:

1. In the main program, before firing off the subsidiary process, create a file with a particular name, and make sure it's empty. I'll call this file fred.
2. After the file has been created, the main program should do something like this:
   

   fork_result=fork();
   
   if(fork_result==-1)
   {
     /* error handling goes here */
   }
   
   if(fork_result==0)
   {
     system("xterm -e tail -f fred");
   
     exit(0);
   }

3. In the subsidiary process, do something like this:
   

   if(freopen(stdout,"fred","w")==NULL)
   {
     /* error handling goes here */
   }

The reason this can't be done with threads is that the freopen() will affect standard output for all threads, not just that one.

Fair warning: I have not tested this concept.

Hope this helps.