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GNU GENERAL PUBLIC LICENSE
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module gitlab.com/postmarketOS/mkinitfs
go 1.16
require (
git.sr.ht/~sircmpwn/getopt v0.0.0-20201218204720-9961a9c6298f // indirect
github.com/BurntSushi/toml v0.4.0 // indirect
github.com/cavaliercoder/go-cpio v0.0.0-20180626203310-925f9528c45e // indirect
github.com/google/renameio v1.0.1 // indirect
github.com/klauspost/compress v1.13.3 // indirect
github.com/klauspost/pgzip v1.2.5 // indirect
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
)

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// Copyright 2021 Clayton Craft <clayton@craftyguy.net>
// SPDX-License-Identifier: GPL-3.0-or-later
package main
import (
"bufio"
"bytes"
"debug/elf"
"encoding/hex"
"errors"
"fmt"
"hash/crc32"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"time"
"git.sr.ht/~sircmpwn/getopt"
"gitlab.com/postmarketOS/mkinitfs/pkgs/archive"
"gitlab.com/postmarketOS/mkinitfs/pkgs/deviceinfo"
"gitlab.com/postmarketOS/mkinitfs/pkgs/misc"
)
func timeFunc(start time.Time, name string) {
elapsed := time.Since(start)
log.Printf("%s completed in: %s", name, elapsed)
}
func main() {
devinfo := deviceinfo.ReadDeviceinfo()
var outDir string
getopt.StringVar(&outDir, "d", "/boot", "Directory to output initfs(-extra), default: /boot")
if err := getopt.Parse(); err != nil {
log.Fatal(err)
}
defer timeFunc(time.Now(), "main")
kernVer, err := getKernelVersion()
if err != nil {
log.Fatal(err)
}
kernFlavor, err := getKernelFlavor()
if err != nil {
log.Fatal(err)
}
log.Print("Generating for kernel version: ", kernVer)
log.Print("Generating for kernel flavor: ", kernFlavor)
log.Print("Output directory: ", outDir)
if err := generateInitfs("initramfs-"+kernFlavor, outDir, kernVer, devinfo); err != nil {
log.Fatal(err)
}
if err := generateInitfsExtra("initramfs-"+kernFlavor+"-extra", outDir, devinfo); err != nil {
log.Fatal(err)
}
}
func createInitfsRootDirs(initfsRoot string) {
dirs := []string{
"/bin", "/sbin", "/usr/bin", "/usr/lib", "/usr/sbin", "/proc", "/sys",
"/dev", "/tmp", "/lib", "/boot", "/sysroot", "/etc",
}
for _, dir := range dirs {
if err := os.MkdirAll(filepath.Join(initfsRoot, dir), os.FileMode(0775)); err != nil {
log.Fatal(err)
}
}
}
func exists(file string) bool {
if _, err := os.Stat(file); err == nil {
return true
}
return false
}
func checksumFile(file string) (string, error) {
checksum := ""
fd, err := os.Open(file)
if err != nil {
return checksum, err
}
defer fd.Close()
// Castagnoli's polynomial
polyTable := crc32.MakeTable(0x82f63b78)
hash := crc32.New(polyTable)
if _, err := io.Copy(hash, fd); err != nil {
return checksum, err
}
hashBytes := hash.Sum(nil)[:]
checksum = hex.EncodeToString(hashBytes)
return checksum, nil
}
func getHookFiles(filesdir string) misc.StringSet {
fileInfo, err := ioutil.ReadDir(filesdir)
if err != nil {
log.Fatal(err)
}
files := make(misc.StringSet)
for _, file := range fileInfo {
path := filepath.Join(filesdir, file.Name())
f, err := os.Open(path)
if err != nil {
log.Fatal(err)
}
defer f.Close()
s := bufio.NewScanner(f)
for s.Scan() {
if !exists(s.Text()) {
log.Fatalf("Unable to find file %q required by %q", s.Text(), path)
}
files[s.Text()] = false
}
if err := s.Err(); err != nil {
log.Fatal(err)
}
}
return files
}
func appendUnique(slice []string, item string) []string {
for _, s := range slice {
if s == item {
return slice
}
}
return append(slice, item)
}
func appendSliceUnique(dest []string, source []string) []string {
for _, s := range source {
dest = appendUnique(dest, s)
}
return dest
}
// Recursively list all dependencies for a given ELF binary
func getBinaryDeps(files misc.StringSet, file string) error {
// if file is a symlink, resolve dependencies for target
fileStat, err := os.Lstat(file)
if err != nil {
log.Print("getBinaryDeps: failed to stat file")
return err
}
// Symlink: write symlink to archive then set 'file' to link target
if fileStat.Mode()&os.ModeSymlink != 0 {
target, err := os.Readlink(file)
if err != nil {
log.Print("getBinaryDeps: unable to read symlink: ", file)
return err
}
if !filepath.IsAbs(target) {
target, err = misc.RelativeSymlinkTargetToDir(target, filepath.Dir(file))
if err != nil {
return err
}
}
if err := getBinaryDeps(files, target); err != nil {
return err
}
return err
}
// get dependencies for binaries
fd, err := elf.Open(file)
if err != nil {
log.Fatal(err)
}
libs, _ := fd.ImportedLibraries()
fd.Close()
files[file] = false
if len(libs) == 0 {
return err
}
libdirs := []string{"/usr/lib", "/lib"}
for _, lib := range libs {
found := false
for _, libdir := range libdirs {
path := filepath.Join(libdir, lib)
if _, err := os.Stat(path); err == nil {
err := getBinaryDeps(files, path)
if err != nil {
return err
}
files[path] = false
found = true
break
}
}
if !found {
log.Fatalf("Unable to locate dependency for %q: %s", file, lib)
}
}
return nil
}
func getFiles(files misc.StringSet, newFiles misc.StringSet, required bool) error {
for file := range newFiles {
err := getFile(files, file, required)
if err != nil {
return err
}
}
return nil
}
func getFile(files misc.StringSet, file string, required bool) error {
if !exists(file) {
if required {
return errors.New("getFile: File does not exist :" + file)
}
return nil
}
files[file] = false
// get dependencies for binaries
if _, err := elf.Open(file); err != nil {
// file is not an elf, so don't resolve lib dependencies
return nil
}
err := getBinaryDeps(files, file)
if err != nil {
return err
}
return nil
}
func getOskConfFontPath(oskConfPath string) (string, error) {
var path string
f, err := os.Open(oskConfPath)
if err != nil {
return path, err
}
defer f.Close()
s := bufio.NewScanner(f)
for s.Scan() {
fields := strings.Fields(s.Text())
// "key = val" is 3 fields
if len(fields) > 2 && fields[0] == "keyboard-font" {
path = fields[2]
}
}
if !exists(path) {
return path, errors.New("Unable to find font: " + path)
}
return path, nil
}
// Get a list of files and their dependencies related to supporting rootfs full
// disk (d)encryption
func getFdeFiles(files misc.StringSet, devinfo deviceinfo.DeviceInfo) error {
confFiles := misc.StringSet{
"/etc/osk.conf": false,
"/etc/ts.conf": false,
"/etc/pointercal": false,
"/etc/fb.modes": false,
"/etc/directfbrc": false,
}
// TODO: this shouldn't be false? though some files (pointercal) don't always exist...
if err := getFiles(files, confFiles, false); err != nil {
return err
}
// osk-sdl
oskFiles := misc.StringSet{
"/usr/bin/osk-sdl": false,
"/sbin/cryptsetup": false,
"/usr/lib/libGL.so.1": false}
if err := getFiles(files, oskFiles, true); err != nil {
return err
}
fontFile, err := getOskConfFontPath("/etc/osk.conf")
if err != nil {
return err
}
files[fontFile] = false
// Directfb
dfbFiles := make(misc.StringSet)
err = filepath.Walk("/usr/lib/directfb-1.7-7", func(path string, f os.FileInfo, err error) error {
if filepath.Ext(path) == ".so" {
dfbFiles[path] = false
}
return nil
})
if err != nil {
log.Print("getBinaryDeps: failed to stat file")
return err
}
if err := getFiles(files, dfbFiles, true); err != nil {
return err
}
// tslib
tslibFiles := make(misc.StringSet)
err = filepath.Walk("/usr/lib/ts", func(path string, f os.FileInfo, err error) error {
if filepath.Ext(path) == ".so" {
tslibFiles[path] = false
}
return nil
})
if err != nil {
log.Print("getBinaryDeps: failed to stat file")
return err
}
libts, _ := filepath.Glob("/usr/lib/libts*")
for _, file := range libts {
tslibFiles[file] = false
}
if err = getFiles(files, tslibFiles, true); err != nil {
return err
}
// mesa hw accel
if devinfo.Deviceinfo_mesa_driver != "" {
mesaFiles := misc.StringSet{
"/usr/lib/libEGL.so.1": false,
"/usr/lib/libGLESv2.so.2": false,
"/usr/lib/libgbm.so.1": false,
"/usr/lib/libudev.so.1": false,
"/usr/lib/xorg/modules/dri/" + devinfo.Deviceinfo_mesa_driver + "_dri.so": false,
}
if err := getFiles(files, mesaFiles, true); err != nil {
return err
}
}
return nil
}
func getHookScripts(files misc.StringSet) {
scripts, _ := filepath.Glob("/etc/postmarketos-mkinitfs/hooks/*.sh")
for _, script := range scripts {
files[script] = false
}
}
func getInitfsExtraFiles(files misc.StringSet, devinfo deviceinfo.DeviceInfo) error {
log.Println("== Generating initramfs extra ==")
binariesExtra := misc.StringSet{
"/lib/libz.so.1": false,
"/sbin/dmsetup": false,
"/sbin/e2fsck": false,
"/usr/sbin/parted": false,
"/usr/sbin/resize2fs": false,
"/usr/sbin/resize.f2fs": false,
}
log.Println("- Including extra binaries")
if err := getFiles(files, binariesExtra, true); err != nil {
return err
}
if exists("/usr/bin/osk-sdl") {
log.Println("- Including FDE support")
if err := getFdeFiles(files, devinfo); err != nil {
return err
}
} else {
log.Println("- *NOT* including FDE support")
}
return nil
}
func getInitfsFiles(files misc.StringSet, devinfo deviceinfo.DeviceInfo) error {
log.Println("== Generating initramfs ==")
requiredFiles := misc.StringSet{
"/bin/busybox": false,
"/bin/sh": false,
"/bin/busybox-extras": false,
"/usr/sbin/telnetd": false,
"/sbin/kpartx": false,
"/etc/deviceinfo": false,
}
// Hook files & scripts
if exists("/etc/postmarketos-mkinitfs/files") {
log.Println("- Including hook files")
hookFiles := getHookFiles("/etc/postmarketos-mkinitfs/files")
if err := getFiles(files, hookFiles, true); err != nil {
return err
}
}
log.Println("- Including hook scripts")
getHookScripts(files)
log.Println("- Including required binaries")
if err := getFiles(files, requiredFiles, true); err != nil {
return err
}
return nil
}
func getInitfsModules(files misc.StringSet, devinfo deviceinfo.DeviceInfo, kernelVer string) error {
log.Println("- Including kernel modules")
modDir := filepath.Join("/lib/modules", kernelVer)
if !exists(modDir) {
return errors.New("Kernel module directory not found: " + modDir)
}
// modules.* required by modprobe
modprobeFiles, _ := filepath.Glob(filepath.Join(modDir, "modules.*"))
for _, file := range modprobeFiles {
files[file] = false
}
// module name (without extension), or directory (trailing slash is important! globs OK)
requiredModules := []string{
"loop",
"dm-crypt",
"kernel/fs/overlayfs/",
"kernel/crypto/",
"kernel/arch/*/crypto/",
}
for _, item := range requiredModules {
dir, file := filepath.Split(item)
if file == "" {
// item is a directory
dir = filepath.Join(modDir, dir)
dirs, _ := filepath.Glob(dir)
for _, d := range dirs {
if err := getModulesInDir(files, d); err != nil {
log.Print("Unable to get modules in dir: ", d)
return err
}
}
continue
} else if dir == "" {
// item is a module name
if err := getModule(files, file, modDir); err != nil {
log.Print("Unable to get module: ", file)
return err
}
continue
} else {
log.Printf("Unknown module entry: %q", item)
}
}
// deviceinfo modules
for _, module := range strings.Fields(devinfo.Deviceinfo_modules_initfs) {
if err := getModule(files, module, modDir); err != nil {
log.Print("Unable to get modules from deviceinfo")
return err
}
}
// /etc/postmarketos-mkinitfs/modules/*.modules
initfsModFiles, _ := filepath.Glob("/etc/postmarketos-mkinitfs/modules/*.modules")
for _, modFile := range initfsModFiles {
f, err := os.Open(modFile)
if err != nil {
log.Print("getInitfsModules: unable to open mkinitfs modules file: ", modFile)
return err
}
defer f.Close()
s := bufio.NewScanner(f)
for s.Scan() {
if err := getModule(files, s.Text(), modDir); err != nil {
log.Print("getInitfsModules: unable to get module file: ", s.Text())
return err
}
}
}
return nil
}
func generateInitSh(templatePath string, outPath string, devinfo deviceinfo.DeviceInfo) error {
// TODO: this function not needed if/when init is a binary
kernFlavor, err := getKernelFlavor()
if err != nil {
return err
}
placeholderTable := map[string]string{
"@INITRAMFS_EXTRA@": "/boot/initramfs-" + kernFlavor + "-extra",
}
var buf bytes.Buffer
// open template
templateFile, err := os.Open(templatePath)
if err != nil {
return err
}
defer templateFile.Close()
s := bufio.NewScanner(templateFile)
for s.Scan() {
line := s.Text()
for p := range placeholderTable {
line = strings.ReplaceAll(line, p, placeholderTable[p])
}
buf.Write([]byte(line + "\n"))
}
outFile, err := os.Create(outPath)
if err != nil {
return err
}
defer outFile.Close()
if err := os.Chmod(outPath, 0755); err != nil {
log.Print("Unable to make %q executable", outPath)
return err
}
if _, err = io.Copy(outFile, &buf); err != nil {
return err
}
return nil
}
func getKernelReleaseFile() (string, error) {
files, _ := filepath.Glob("/usr/share/kernel/*/kernel.release")
// only one kernel flavor supported
if len(files) != 1 {
return "", errors.New(fmt.Sprintf("Only one kernel release/flavor is supported, found: %q", files))
}
return files[0], nil
}
func getKernelVersion() (string, error) {
var version string
releaseFile, err := getKernelReleaseFile()
if err != nil {
return version, err
}
contents, err := os.ReadFile(releaseFile)
if err != nil {
return version, err
}
return strings.TrimSpace(string(contents)), nil
}
func getKernelFlavor() (string, error) {
var flavor string
releaseFile, err := getKernelReleaseFile()
if err != nil {
return flavor, err
}
// path of release file is in the form: /usr/share/kernel/<flavor>/kernel.release
flavor = filepath.Base(filepath.Dir(releaseFile))
return flavor, nil
}
func generateInitfs(name string, path string, kernVer string, devinfo deviceinfo.DeviceInfo) error {
initfsArchive, err := archive.New()
if err != nil {
return err
}
requiredDirs := []string{
"/bin", "/sbin", "/usr/bin", "/usr/sbin", "/proc", "/sys",
"/dev", "/tmp", "/lib", "/boot", "/sysroot", "/etc",
}
for _, dir := range requiredDirs {
initfsArchive.Dirs[dir] = false
}
if err := getInitfsFiles(initfsArchive.Files, devinfo); err != nil {
return err
}
if err := getInitfsModules(initfsArchive.Files, devinfo, kernVer); err != nil {
return err
}
// init.sh is generated
// TODO: make a temp dir for this (mktemp)...
initsh := "/tmp/cpio/initfs"
generateInitSh("/usr/share/postmarketos-mkinitfs/init.sh.in", initsh, devinfo)
if err := initfsArchive.AddFile(initsh, "/init"); err != nil {
return err
}
// splash images
log.Println("- Including splash images")
splashFiles, _ := filepath.Glob("/usr/share/postmarketos-splashes/*.ppm.gz")
for _, file := range splashFiles {
// splash images are expected at /<file>
if err := initfsArchive.AddFile(file, filepath.Join("/", filepath.Base(file))); err != nil {
return err
}
}
// initfs_functions
if err := initfsArchive.AddFile("/usr/share/postmarketos-mkinitfs/init_functions.sh", "/init_functions.sh"); err != nil {
return err
}
if err := initfsArchive.Write(filepath.Join(path, name), os.FileMode(0644)); err != nil {
return err
}
return nil
}
func generateInitfsExtra(name string, path string, devinfo deviceinfo.DeviceInfo) error {
initfsExtraArchive, err := archive.New()
if err != nil {
return err
}
if err := getInitfsExtraFiles(initfsExtraArchive.Files, devinfo); err != nil {
return err
}
if err := initfsExtraArchive.Write(filepath.Join(path, name), os.FileMode(0644)); err != nil {
return err
}
return nil
}
func stripExts(file string) string {
for {
if filepath.Ext(file) == "" {
break
}
file = strings.Trim(file, filepath.Ext(file))
}
return file
}
func getModulesInDir(files misc.StringSet, modPath string) error {
err := filepath.Walk(modPath, func(path string, f os.FileInfo, err error) error {
// TODO: need to support more extensions?
if filepath.Ext(path) != ".ko" && filepath.Ext(path) != ".xz" {
return nil
}
files[path] = false
return nil
})
if err != nil {
return err
}
return nil
}
// Given a module name, e.g. 'dwc_wdt', resolve the full path to the module
// file and all of its dependencies
func getModule(files misc.StringSet, modName string, modDir string) error {
modDep := filepath.Join(modDir, "modules.dep")
if !exists(modDep) {
log.Fatal("Kernel module.dep not found: ", modDir)
}
fd, err := os.Open(modDep)
if err != nil {
log.Print("Unable to open modules.dep: ", modDep)
return err
}
defer fd.Close()
s := bufio.NewScanner(fd)
for s.Scan() {
fields := strings.Fields(s.Text())
fields[0] = strings.TrimSuffix(fields[0], ":")
if modName != filepath.Base(stripExts(fields[0])) {
continue
}
for _, modPath := range fields {
p := filepath.Join(modDir, modPath)
if !exists(p) {
log.Print(fmt.Sprintf("Tried to include a module that doesn't exist in the modules directory (%s): %s", modDir, p))
return err
}
files[p] = false
}
}
if err := s.Err(); err != nil {
log.Print("Unable to get module + dependencies: ", modName)
return err
}
return err
}

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main_test.go Normal file
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// Copyright 2021 Clayton Craft <clayton@craftyguy.net>
// SPDX-License-Identifier: GPL-3.0-or-later
package main
import (
"testing"
)
func TestStripExts(t *testing.T) {
tables := []struct {
in string
expected string
}{
{"/foo/bar/bazz.tar", "/foo/bar/bazz"},
{"file.tar.gz.xz.zip", "file"},
{"another_file", "another_file"},
{"a.b.c.d.e.f.g.h.i", "a"},
}
for _, table := range tables {
out := stripExts(table.in)
if out != table.expected {
t.Errorf("Expected: %q, got: %q", table.expected, out)
}
}
}

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pkgs/archive/archive.go Normal file
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// Copyright 2021 Clayton Craft <clayton@craftyguy.net>
// SPDX-License-Identifier: GPL-3.0-or-later
package archive
import (
"bytes"
"log"
"os"
"strings"
"io"
"path/filepath"
"compress/flate"
"github.com/cavaliercoder/go-cpio"
"github.com/klauspost/pgzip"
"github.com/google/renameio"
"gitlab.com/postmarketOS/mkinitfs/pkgs/misc"
)
type Archive struct {
Dirs misc.StringSet
Files misc.StringSet
cpioWriter *cpio.Writer
buf *bytes.Buffer
}
func New() (*Archive, error) {
buf := new(bytes.Buffer)
archive := &Archive{
cpioWriter: cpio.NewWriter(buf),
Files: make(misc.StringSet),
Dirs: make(misc.StringSet),
buf: buf,
}
return archive, nil
}
func (archive *Archive) Write(path string, mode os.FileMode) error {
if err := archive.writeCpio(); err != nil {
return err
}
if err := archive.cpioWriter.Close(); err != nil {
return err
}
if err := archive.writeCompressed(path, mode); err != nil {
return err
}
return nil
}
func (archive *Archive) AddFile(file string, dest string) error {
if err := archive.addDir(filepath.Dir(dest)); err != nil {
return err
}
if archive.Files[file] {
// Already written to cpio
return nil
}
fileStat, err := os.Lstat(file)
if err != nil {
log.Print("AddFile: failed to stat file: ", file)
return err
}
// Symlink: write symlink to archive then set 'file' to link target
if fileStat.Mode()&os.ModeSymlink != 0 {
// log.Printf("File %q is a symlink", file)
target, err := os.Readlink(file)
if err != nil {
log.Print("AddFile: failed to get symlink target: ", file)
return err
}
destFilename := strings.TrimPrefix(dest, "/")
hdr := &cpio.Header{
Name: destFilename,
Linkname: target,
Mode: 0644 | cpio.ModeSymlink,
Size: int64(len(target)),
// Checksum: 1,
}
if err := archive.cpioWriter.WriteHeader(hdr); err != nil {
return err
}
if _, err = archive.cpioWriter.Write([]byte(target)); err != nil {
return err
}
archive.Files[file] = true
if filepath.Dir(target) == "." {
target = filepath.Join(filepath.Dir(file), target)
}
// make sure target is an absolute path
if !filepath.IsAbs(target) {
target, err = misc.RelativeSymlinkTargetToDir(target, filepath.Dir(file))
}
// TODO: add verbose mode, print stuff like this:
// log.Printf("symlink: %q, target: %q", file, target)
// write symlink target
err = archive.AddFile(target, target)
return err
}
// log.Printf("writing file: %q", file)
fd, err := os.Open(file)
if err != nil {
return err
}
defer fd.Close()
destFilename := strings.TrimPrefix(dest, "/")
hdr := &cpio.Header{
Name: destFilename,
Mode: cpio.FileMode(fileStat.Mode().Perm()),
Size: fileStat.Size(),
// Checksum: 1,
}
if err := archive.cpioWriter.WriteHeader(hdr); err != nil {
return err
}
if _, err = io.Copy(archive.cpioWriter, fd); err != nil {
return err
}
archive.Files[file] = true
return nil
}
func (archive *Archive) writeCompressed(path string, mode os.FileMode) error {
tFile, err := renameio.TempFile("", path)
if err != nil {
return err
}
defer tFile.Cleanup()
// TODO: support other compression formats, based on deviceinfo
gz, err := pgzip.NewWriterLevel(tFile, flate.BestSpeed)
if err != nil {
return err
}
if _, err = io.Copy(gz, archive.buf); err != nil {
return err
}
if err := gz.Close(); err != nil {
return err
}
if err := tFile.CloseAtomicallyReplace(); err != nil {
return err
}
if err := os.Chmod(path, mode); err != nil {
return err
}
return nil
}
func (archive *Archive) writeCpio() error {
// Write any dirs added explicitly
for dir := range archive.Dirs {
archive.addDir(dir)
}
// Write files and any missing parent dirs
for file, imported := range archive.Files {
if imported {
continue
}
if err := archive.AddFile(file, file); err != nil {
return err
}
}
return nil
}
func (archive *Archive) addDir(dir string) error {
if archive.Dirs[dir] {
// Already imported
return nil
}
if dir == "/" {
dir = "."
}
subdirs := strings.Split(strings.TrimPrefix(dir, "/"), "/")
for i, subdir := range subdirs {
path := filepath.Join(strings.Join(subdirs[:i], "/"), subdir)
if archive.Dirs[path] {
// Subdir already imported
continue
}
err := archive.cpioWriter.WriteHeader(&cpio.Header{
Name: path,
Mode: cpio.ModeDir | 0755,
})
if err != nil {
return err
}
archive.Dirs[path] = true
// log.Print("wrote dir: ", path)
}
return nil
}

52
pkgs/deviceinfo/deviceinfo.go Normal file
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// Copyright 2021 Clayton Craft <clayton@craftyguy.net>
// SPDX-License-Identifier: GPL-3.0-or-later
package deviceinfo
import (
"github.com/BurntSushi/toml"
"log"
"os"
)
// Note: fields must be exported (start with capital letter)
// https://github.com/BurntSushi/toml/issues/121
type DeviceInfo struct {
Deviceinfo_append_dtb string
Deviceinfo_arch string
Deviceinfo_bootimg_append_seandroidenforce string
Deviceinfo_bootimg_blobpack string
Deviceinfo_bootimg_dtb_second string
Deviceinfo_bootimg_mtk_mkimage string
Deviceinfo_bootimg_pxa string
Deviceinfo_bootimg_qcdt string
Deviceinfo_dtb string
Deviceinfo_flash_offset_base string
Deviceinfo_flash_offset_kernel string
Deviceinfo_flash_offset_ramdisk string
Deviceinfo_flash_offset_second string
Deviceinfo_flash_offset_tags string
Deviceinfo_flash_pagesize string
Deviceinfo_generate_bootimg string
Deviceinfo_generate_legacy_uboot_initfs string
Deviceinfo_mesa_driver string
Deviceinfo_mkinitfs_postprocess string
Deviceinfo_initfs_compression string
Deviceinfo_kernel_cmdline string
Deviceinfo_legacy_uboot_load_address string
Deviceinfo_modules_initfs string
Deviceinfo_flash_kernel_on_update string
}
func ReadDeviceinfo() DeviceInfo {
file := "/etc/deviceinfo"
_, err := os.Stat(file)
if err != nil {
log.Fatal("Unable to find deviceinfo: ", file)
}
var deviceinfo DeviceInfo
if _, err := toml.DecodeFile(file, &deviceinfo); err != nil {
log.Fatal(err)
}
return deviceinfo
}

41
pkgs/misc/misc.go Normal file
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// Copyright 2021 Clayton Craft <clayton@craftyguy.net>
// SPDX-License-Identifier: GPL-3.0-or-later
package misc
import (
"log"
"os"
"path/filepath"
)
type StringSet map[string]bool
// Converts a relative symlink target path (e.g. ../../lib/foo.so), that is
// absolute path
func RelativeSymlinkTargetToDir(symPath string, dir string) (string, error) {
var path string
oldWd, err := os.Getwd()
if err != nil {
log.Print("Unable to get current working dir")
return path, err
}
if err := os.Chdir(dir); err != nil {
log.Print("Unable to change to working dir: ", dir)
return path, err
}
path, err = filepath.Abs(symPath)
if err != nil {
log.Print("Unable to resolve abs path to: ", symPath)
return path, err
}
if err := os.Chdir(oldWd); err != nil {
log.Print("Unable to change to old working dir")
return path, err
}
return path, nil
}