Pipes
3 communcation channels:
stdin, stdout, stderr
We use |
to pipe information of one process to another
We can think of pipe as an anonymous file that residese between 2 processes.
One process writes bytes to the pipe, the other reads.
What data structure pipes use?
Are all pipes unidirectional / half-duplex, i.e. one way from one process to another?
Implement
#include <unistd.h>
int pipe( int fd[] ) // 0 for success, !0 for errors
fd is an array of file desc, fd[0] == reading end, fd[1] == writing end