105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
// Copyright 2023 Mikhail Klementev. All rights reserved.
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// Use of this source code is governed by a AGPLv3 license
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// (or later) that can be found in the LICENSE file.
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package kernel
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import (
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"io/ioutil"
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"math/rand"
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"os"
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"os/signal"
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"path/filepath"
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"regexp"
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"runtime"
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"strings"
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"github.com/rs/zerolog/log"
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"code.dumpstack.io/tools/out-of-tree/cache"
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"code.dumpstack.io/tools/out-of-tree/config"
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"code.dumpstack.io/tools/out-of-tree/container"
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"code.dumpstack.io/tools/out-of-tree/fs"
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)
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func MatchPackages(km config.Target) (packages []string, err error) {
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pkgs, err := km.Distro.Packages()
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if err != nil {
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return
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}
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r, err := regexp.Compile(km.Kernel.Regex)
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if err != nil {
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return
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}
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for _, pkg := range pkgs {
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if r.MatchString(pkg) {
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packages = append(packages, pkg)
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}
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}
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return
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}
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func vsyscallAvailable() (available bool, err error) {
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if runtime.GOOS != "linux" {
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// Docker for non-Linux systems is not using the host
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// kernel but uses kernel inside a virtual machine, so
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// it builds by the Docker team with vsyscall support.
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available = true
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return
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}
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buf, err := ioutil.ReadFile("/proc/self/maps")
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if err != nil {
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return
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}
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available = strings.Contains(string(buf), "[vsyscall]")
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return
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}
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func GenRootfsImage(d container.Image, download bool) (rootfs string, err error) {
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imagesPath := config.Dir("images")
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imageFile := d.Name + ".img"
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rootfs = filepath.Join(imagesPath, imageFile)
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if !fs.PathExists(rootfs) {
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if download {
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log.Info().Msgf("%v not available, start download", imageFile)
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err = cache.DownloadQemuImage(imagesPath, imageFile)
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}
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}
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return
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}
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func ShuffleStrings(a []string) []string {
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// Fisher–Yates shuffle
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for i := len(a) - 1; i > 0; i-- {
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j := rand.Intn(i + 1)
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a[i], a[j] = a[j], a[i]
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}
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return a
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}
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func SetSigintHandler(variable *bool) {
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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go func() {
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counter := 0
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for _ = range c {
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if counter == 0 {
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*variable = true
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log.Warn().Msg("shutdown requested, finishing work")
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log.Info().Msg("^C a couple of times more for an unsafe exit")
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} else if counter >= 3 {
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log.Fatal().Msg("unsafe exit")
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}
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counter += 1
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}
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}()
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}
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