utils.c: Simplify and fix get_num_digits()
fpart.c: Fix indentation
file_entry.c: Make call to setpgid(0, 0) more explicit
fpart/utils.c: Fix incorrect use of optarg
file_entry.c: Fix incorrect path lookups when generating parent dirs
fpart.c: Remove useless bzero(3) calls
fpart.c: Fix file closure
file_entry.c: Get rid of useless variable (input_path_len)