Reference no: EM131110750

1. Create a simple C program to generate a file consisting of the word "Hello", one million bytes of blank space (null bytes), and then "world\n", but that consumes only a small number of blocks on disk while having a logical size of 1,000,011 bytes.

2. Create a C program "mycopy.c" that takes two filenames A and B as command line arguments. This program should copy the contents of A to B, making B a byte-for-byte copy of A. Zero bytes in A should consume little to no space in B. (Hint: You'll have to use the sparse file creation technique of the previous question here.)

3. Describe a simple way an attacker could get root access on a system if loopback mounts were permitted for non-privileged users.