134 lines
3.5 KiB
Go
134 lines
3.5 KiB
Go
// This file was originally part of the project "LURE - Linux User REpository", created by Elara Musayelyan.
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// It has been modified as part of "ALR - Any Linux Repository" by the ALR Authors.
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//
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// ALR - Any Linux Repository
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// Copyright (C) 2025 The ALR Authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package handlers
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import (
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"context"
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"fmt"
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"os"
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"os/exec"
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"runtime"
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"strings"
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"syscall"
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"time"
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"gitea.plemya-x.ru/Plemya-x/fakeroot"
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"mvdan.cc/sh/v3/expand"
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"mvdan.cc/sh/v3/interp"
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)
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// FakerootExecHandler was extracted from github.com/mvdan/sh/interp/handler.go
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// and modified to run commands in a fakeroot environent.
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func FakerootExecHandler(killTimeout time.Duration) interp.ExecHandlerFunc {
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return func(ctx context.Context, args []string) error {
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hc := interp.HandlerCtx(ctx)
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path, err := interp.LookPathDir(hc.Dir, hc.Env, args[0])
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if err != nil {
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fmt.Fprintln(hc.Stderr, err)
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return interp.NewExitStatus(127)
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}
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cmd := &exec.Cmd{
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Path: path,
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Args: args,
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Env: execEnv(hc.Env),
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Dir: hc.Dir,
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Stdin: hc.Stdin,
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Stdout: hc.Stdout,
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Stderr: hc.Stderr,
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}
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err = fakeroot.Apply(cmd)
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if err != nil {
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return err
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}
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err = cmd.Start()
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if err == nil {
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if done := ctx.Done(); done != nil {
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go func() {
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<-done
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if killTimeout <= 0 || runtime.GOOS == "windows" {
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_ = cmd.Process.Signal(os.Kill)
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return
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}
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// TODO: don't temporarily leak this goroutine
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// if the program stops itself with the
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// interrupt.
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go func() {
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time.Sleep(killTimeout)
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_ = cmd.Process.Signal(os.Kill)
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}()
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_ = cmd.Process.Signal(os.Interrupt)
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}()
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}
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err = cmd.Wait()
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}
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switch x := err.(type) {
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case *exec.ExitError:
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// started, but errored - default to 1 if OS
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// doesn't have exit statuses
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if status, ok := x.Sys().(syscall.WaitStatus); ok {
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if status.Signaled() {
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if ctx.Err() != nil {
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return ctx.Err()
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}
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return interp.NewExitStatus(uint8(128 + status.Signal()))
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}
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return interp.NewExitStatus(uint8(status.ExitStatus()))
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}
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return interp.NewExitStatus(1)
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case *exec.Error:
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// did not start
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fmt.Fprintf(hc.Stderr, "%v\n", err)
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return interp.NewExitStatus(127)
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default:
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return err
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}
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}
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}
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// execEnv was extracted from github.com/mvdan/sh/interp/vars.go
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func execEnv(env expand.Environ) []string {
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list := make([]string, 0, 64)
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env.Each(func(name string, vr expand.Variable) bool {
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if !vr.IsSet() {
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// If a variable is set globally but unset in the
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// runner, we need to ensure it's not part of the final
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// list. Seems like zeroing the element is enough.
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// This is a linear search, but this scenario should be
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// rare, and the number of variables shouldn't be large.
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for i, kv := range list {
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if strings.HasPrefix(kv, name+"=") {
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list[i] = ""
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}
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}
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}
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if vr.Exported && vr.Kind == expand.String {
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list = append(list, name+"="+vr.String())
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}
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return true
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})
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return list
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}
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