zhangyoufu’s gists

zhangyoufu / detect-x86-64-abi-version.sh

Created December 12, 2025 02:05

detect x86-64 ABI version on Linux, using /proc/cpuinfo

	#!/bin/bash

	# Note on hybrid CPUs (P-cores/E-cores):
	# Linux /proc/cpuinfo reports only features common to ALL cores.
	# This script will correctly detect the lowest ISA level supported
	# across all core types, which matches glibc's behavior.

	get_x86_64_abi_version() {
	local FLAGS
	local DETECTED_LEVEL

zhangyoufu / log_init.go

Created November 12, 2025 09:54

if stdout is tty: log text to stderr; else: log json to stdout

	import "github.com/mattn/go-isatty"

	func init() {
	if isatty.IsTerminal(os.Stdout.Fd()) {
	slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, nil)))
	}
	}

zhangyoufu / nvme-shutdown.sh

Created October 24, 2025 07:41

zhangyoufu / userChrome.css

Created October 22, 2025 15:19

Firefox UI Customization: Compact Vertical Tab Bar

	@media -moz-pref("sidebar.verticalTabs") {
	:root {
	--tab-block-margin: 0 !important;
	--tab-min-height: 24px !important;
	}
	}

	#tabbrowser-tabs[orient="vertical"] {
	.tabbrowser-tab {
	padding-block: 0 !important;

zhangyoufu / cksum.sh

Created September 14, 2025 08:05

Calculate multiple checksum for a single file

zhangyoufu / aliyun-cs-credential.sh

Last active August 8, 2025 15:25

使用阿里云OpenAPI获得Kubernetes集群kubeconfig的用户证书（长期/临时），依赖jq、yq、aliyun-cli

	#!/bin/bash
	set -euo pipefail

	: $CLUSTER_ID
	: ${PRIVATE:=false} # auto use private IP if public IP not available
	: ${MINUTES:=60} # defaults to 1 hour
	: ${SHOW_CLUSTER:=}
	: ${REGION_ID:=cn-shanghai} # choose nearest region as OpenAPI endpoint, don't need to match ACK cluster location

	echo >&2 '+ aliyun cs DescribeClusterUserKubeconfig'

zhangyoufu / mt76_tx_hang_reset

Created August 2, 2025 00:36

/etc/init.d/mt76_tx_hang_reset chmod +x / enable / start

	#!/bin/sh /etc/rc.common

	START=90
	STOP=01
	USE_PROCD=1

	start_service() {
	procd_open_instance
	procd_set_param command /bin/sh -c 'while :; do read < /sys/kernel/debug/ieee80211/phy1/mt76/tx_hang_reset; [ "$REPLY" -eq 0 ] \|\| break; sleep 5; done; reboot'
	procd_close_instance

zhangyoufu / torrent.py

Created May 20, 2025 11:08

modern rewrite of BitTorrent .torrent file parser from here https://web.archive.org/web/20200919043954/https://effbot.org/zone/bencode.htm

	#!/usr/bin/env python3
	from collections.abc import Buffer, Generator
	from typing import TypeAlias
	import re

	Token: TypeAlias = int \| bytes \| str
	Result: TypeAlias = int \| bytes \| list['Result'] \| dict[bytes, 'Result']

	regexp = re.compile(rb'([del])\|i(-?\d+)e\|(\d+):')

zhangyoufu / steamguard_otp.sh

Created March 12, 2025 06:09

calculate SteamGuard OTP in shell script (standard TOTP, last step use base26 charset, truncate to 5 chars)

	#!/bin/bash

	tohex() { od -An -t x1 \| tr -d '[:space:]'; }
	fromhex() { printf %b "$(echo "$1" \| sed 's/../\\x&/g')"; }
	steamguard_otp() {
	SECRET_HEX=$(base32 -d <<<"$1" \| tohex)
	DIGEST_HEX=$(fromhex "$(printf "%016x" "$(($(date +%s)/30))")" \| openssl dgst -sha1 -mac HMAC -macopt hexkey:"${SECRET_HEX}" -binary \| tohex)
	OFFSET=$((0x${DIGEST_HEX:39:1}))
	X=$((0x${DIGEST_HEX:$((OFFSET*2)):8}&0x7FFFFFFF))

zhangyoufu / aliyun-rom.txt

Created March 7, 2025 10:01

	# dmidecode -t 0
	Vendor: SeaBIOS
	Version: e623647
	Release Date: 04/01/2014
	# cat /proc/iomem
	000c0000-000c91ff : Video ROM # https://gitlab.com/qemu-project/qemu/-/blob/3257fc8383b13856e6719d1390655ce24bafd071/pc-bios/vgabios-cirrus.bin
	000c9800-000cbbff : Adapter ROM # https://gitlab.com/qemu-project/qemu/-/blob/3257fc8383b13856e6719d1390655ce24bafd071/pc-bios/kvmvapic.bin
	fffc0000-ffffffff : Reserved # dd if=/dev/mem bs=1024 skip=4194048 count=256 of=seabios.bin

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