How to Use Dprintf()
I've Been Told That the Function Dprintf() Can Be Useful in Writing Data to Pipes. Problem Is, I Can't Find Any Examples That Explain How to Use It. I've Read...
I've been told that the function dprintf() can be useful in writing data to pipes. Problem is, I can't find any examples that explain how to use it. I've read everything in that link, but still don't quite understand it.
Just a very simple example will help me understand a lot. For instance, if I had a pipe:
int fd[2];
pipe(fd);
and a few pids
pid_t ID1, ID2, ID3;
how could I use dprintf() to write those pids to the pipe?
1 Answer
dprintf works just like fprintf, except the first parameter is a file descriptor (i.e. an int) instead of a FILE *.
dprintf(fd[0], "%d : %d : %d", ID1, ID2, ID3);
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
