Chapter 10, Problem 10.9HW

Consider the following invocation of the fstatcheck program, from Problem 10.8:

linux> fstatcheck 3 < foo.txt

You might expect that this invocation of fstatcheck would fetch and display metadata for file foo.txt. However, when we run it on our system, it fails with a "bad file descriptor." Given this behavior, fill in the pseudocode that the·shell must·be executing between the fork and execve calls:

if (Fork() == 0) { /* child */

/* What code is the shell executing right here? */

Execve(“fstatcheck”, argv, envp);

}