bpf-prog-list. List bpf programs on system.

Why not bpftool?

Well this is a small binary and does what I need, also a good learning exercise.

A note on Architecture

By default this targets x86_64 since a bare syscall() is used the NR for SYS_bpf may be different on your machine.

It can be checked by inspecting the preprocessor stage of your compiler by printing the macro defined in sys/syscall.h:

    printf SYS_bpf | gcc -include sys/syscall.h -E -

for clang just swap out gcc command.