| // Ref: https://en.cppreference.com/w/cpp/types/enable_if | |
| #include <type_traits> | |
| #include <iostream> | |
| struct TypeTrue { | |
| static constexpr bool enable_if_condition = true; | |
| }; | |
| struct TypeFalse { |
| #!/bin/bash | |
| HOST=192.xxx.xxx.xxx | |
| PORT=1234 | |
| echo 'some_string' | socat - EXEC:"telnet $HOST $PORT",pty,setsid,ctty | tail -n +5 |
| #!/bin/bash | |
| # listen_feed.sh 224.0.31.130 14382 ens6d1 out_file | |
| # Runs: socat udp-datagram:224.0.31.130:14382,bind=:14382,ip-add-membership=224.0.31.130:ens6d1 /dev/null > out_file | |
| UDP_ADDRESS="224.0.31.130" | |
| UDP_PORT="14382" | |
| INTERFACE="ens6d1" | |
| if [ $# -ne 3 ] && [ $# -ne 4 ]; then |
| " If startup is slow - change clipboard options | |
| " Show line/row/col numbers | |
| set showcmd " This should be before nocompatible or nocp | |
| set nu | |
| set ruler | |
| set laststatus=2 | |
| set incsearch | |
| set history=10000 |
| from cffi_example.lzo_ext import ffi, lib | |
| # `compressed_data` is `bytes` array | |
| # `compressed_data_len` is int | |
| uncompressed_data = ffi.new("char[]", 10000) | |
| ret_val = lib.decompress(compressed_data, compressed_data_len, uncompressed_data) |
| # Generate module `cffi_example` using `python3 generate_cffi_example_module.py` | |
| import os | |
| from cffi import FFI | |
| ffi = FFI() | |
| person_header = """ | |
| unsigned int decompress(const uint8_t* raw_data, size_t compressed_size, uint8_t* decompressed_data); | |
| """ |
| #!/usr/bin/env python3 | |
| """ | |
| eg: | |
| python3 ./logging_exceptions_argparsing_retry_in_python.py -w -x opt1 -y 3 -z 1 2 3 -f ~/.bashrc -d 20190101 --inp_datestring 20191101 | |
| """ | |
| from __future__ import print_function | |
| import os | |
| import sys | |
| import argparse |
| # Block internet access and limit SSH to single host to user 'vnc' | |
| # NOTE: This is not a perfect implementation, it can be worked around. | |
| sudo iptables -A OUTPUT -p tcp -m tcp --dport 80 -m owner --uid-owner vnc -j DROP | |
| sudo iptables -A OUTPUT -p tcp -m tcp --dport 443 -m owner --uid-owner vnc -j DROP | |
| sudo iptables -A OUTPUT ! -d 192.168.101.168/32 -p tcp -m tcp --dport 22 -m owner --uid-owner vnc -j REJECT --reject-with icmp-port-unreachable |
| #!/usr/bin/env python3 | |
| # https://github.com/construct/construct - actively developed | |
| import construct | |
| from construct import RepeatUntil, Struct, Bytes, Int16ub, Int8ub, Construct, Const, Computed, BitStruct, BitsInteger | |
| Test = Struct( | |
| "const_val" / Const(b'AB'), | |
| "bit_fields" / BitStruct('b1' / BitsInteger(4), 'b2' / BitsInteger(3), 'b3' / BitsInteger(1)), | |
| "variable_array_length" / Int8ub, |