Different standard streams per POSIX thread
- by Roman Nikitchenko
Is there any possibility to achieve different redirections for standard output like printf(3) for different POSIX thread? What about standard input?
I have lot of code based on standard input/output and I only can separate this code into different POSIX thread, not process. Linux operation system, C standard library.
I know I can refactor code to replace printf() to fprintf() and further in this style.
But in this case I need to provide some kind of context which old code doesn't have.
So doesn't anybody have better idea (look into code below)?
#include <pthread.h>
#include <stdio.h>
void* different_thread(void*)
{
// Something to redirect standard output which doesn't affect main thread.
// ...
// printf() shall go to different stream.
printf("subthread test\n");
return NULL;
}
int main()
{
pthread_t id;
pthread_create(&id, NULL, different_thread, NULL);
// In main thread things should be printed normally...
printf("main thread test\n");
pthread_join(id, NULL);
return 0;
}
