fdmess is a small utility to redirect file
descriptors of running processes and more
generally tweak them. It works by attaching with
ptrace to an existing process and forcing it to
execute some syscall. This way, you can force a
process to drop privileges, to redirect a file
descriptor to a file or a TCP/IP connection, to
connect a descriptor to the descriptor of another
running process with a Unix socket, or to set a
file descriptor equal to the descriptor of another
running process. Since the code hooks are
architecture-dependent, only the Linux-x86 and
Linux-x86_64 architectures are currently
supported.
