Consider following source, reduced for simplicity
int main()
{
int d[2];
pipe(d);
if(fork())
{
close(1);
dup(d[1]);
execlp("ls", "ls", NULL);
}
else
{
close(0);
dup(d[0]);
execlp("cat", "cat", NULL);
}
}
So it creates a pipe and redirects the output from ls to cat.
It works perfectly fine, no problems. But change cat to more and bash breaks.
The symptoms are:
you don't see anything you type
pressing "enter" shows up a new prompt, but not in a new line, but in the same one
you can execute any command and see the output
reset helps fixing things up.
So there is a problem with input from keyboard, it is there, but is not visible.
Why is that?
