Initial code commit

2026-09-05 16:47:32 -04:00 · 2025-09-28 01:45:11 -04:00
parent 8661409033
commit c9ecd3251b
11 changed files with 1169 additions and 0 deletions
@@ -0,0 +1,158 @@
+package main
+
+import (
+	"bufio"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/rwinkhart/go-boilerplate/front"
+	"github.com/rwinkhart/go-boilerplate/other"
+)
+
+func system() {
+	for {
+		var doAll bool
+		choice := front.InputMenuGen("Tweak:", []string{"back", "all", "replace sudo with doas", "enable ipv6 privacy extensions", "enable ext4 fast_commit", "enable SysRq reboots", "disable kernel security mitigations", "unlock amdgpu tuning", "enable amd_pstate in passive mode (recommended for zenver2)"})
+		switch choice {
+		case 1:
+			return
+		case 2:
+			doAll = true
+			fallthrough
+		case 3:
+			writeFile("/etc/doas.conf", "permit persist keepenv :wheel as root", "root", 0644)
+			writeFile("/tmp/PKGBUILD", `# Maintainer: Arch Linux Team
+# Contributor: Levente Polyak <anthraxx[at]archlinux[dot]org>
+
+pkgname=base-devel
+pkgver=1
+pkgrel=2
+pkgdesc='Basic tools to build Arch Linux packages'
+url='https://www.archlinux.org'
+arch=('any')
+license=('GPL')
+options=('!debug')
+depends=(
+  archlinux-keyring
+  autoconf
+  automake
+  binutils
+  bison
+  debugedit
+  fakeroot
+  file
+  findutils
+  flex
+  gawk
+  gcc
+  gettext
+  grep
+  groff
+  gzip
+  libtool
+  m4
+  make
+  pacman
+  pacman-contrib
+  patch
+  pkgconf
+  sed
+  opendoas
+  texinfo
+  which
+)
+
+# vim: ts=2 sw=2 et:
+`, "nobody", 0777)
+			cmd := exec.Command("sudo", "-u", "nobody", "makepkg", "-si", "--dir", "/tmp")
+			err := cmd.Run()
+			if err != nil {
+				other.PrintError("Failed to build+install custom base-devel", 1)
+			}
+			cmd = exec.Command("pacman", "-S", "opendoas", "--noconfirm")
+			err = cmd.Run()
+			if err != nil {
+				other.PrintError("Failed to install opendoas", 1)
+			}
+			cmd = exec.Command("pacman", "-R", "sudo", "--noconfirm")
+			err = cmd.Run()
+			if err != nil {
+				other.PrintError("Failed to remove sudo", 1)
+			}
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 4:
+			nics, err := os.ReadDir("/sys/class/net")
+			if err != nil {
+				other.PrintError("Failed to retrieve NICs", 1)
+			}
+			var sysctlConf strings.Builder
+			sysctlConf.WriteString("net.ipv6.conf.all.use_tempaddr = 2\nnet.ipv6.conf.default.use_tempaddr = 2")
+			for _, nic := range nics {
+				sysctlConf.WriteString("\nnet.ipv6.conf." + nic.Name() + "use_tempaddr = 2")
+			}
+			writeFile("/etc/sysctl.d/40-ipv6-priv-ext.conf", sysctlConf.String(), "root", 0644)
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 5:
+			cmd := exec.Command("tune2fs", "-O", "fast_commit", front.Input("/dev/driveparition:"))
+			err := cmd.Run()
+			if err != nil {
+				other.PrintError("Failed to enable fast_commit", 1)
+			}
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 6:
+			writeFile("/etc/sysctl.d/35-sysrq.conf", "kernel.sysrq = 244", "root", 0644)
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 7:
+			addKernelParams([]string{"mitigations=off"})
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 8:
+			addKernelParams([]string{"amdgpu.ppfeaturemask=0xffffffff"})
+
+			if !doAll {
+				break
+			}
+			fallthrough
+		case 9:
+			addKernelParams([]string{"amd_pstate=passive"})
+		}
+	}
+}
+
+func addKernelParams(newParameters []string) {
+	f, err := os.Open("/boot/loader/entries/linux-cachyos.conf")
+	if err != nil {
+		other.PrintError("Failed to open systemd-boot entry", 1)
+	}
+	fScanner := bufio.NewScanner(f)
+	fScanner.Split(bufio.ScanLines)
+	var parameters []string
+	for i := 0; fScanner.Scan(); i++ {
+		if i == 1 {
+			parameters = strings.Split(fScanner.Text(), " ")[2:]
+			break
+		}
+	}
+	parameters = append(parameters, newParameters...)
+	writeFile("/boot/loader/entries/linux-cachyos.conf", "title Linux Cachyos\noptions root=UUID=e2ff600b-0202-4620-bed3-54d7a58414f8 "+strings.Join(parameters, " ")+"\nlinux /vmlinuz-linux-cachyos\ninitrd /initramfs-linux-cachyos.img", "root", 0700)
+}