1 files changed, 0 insertions, 293 deletions
diff --git a/pkg/chrootuser/user_linux.go b/pkg/chrootuser/user_linux.go
deleted file mode 100644
index 583eca569..000000000
--- a/pkg/chrootuser/user_linux.go
+++ /dev/null
@@ -1,293 +0,0 @@
-// +build linux
-
-package chrootuser
-
-import (
-	"bufio"
-	"flag"
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"os/user"
-	"strconv"
-	"strings"
-	"sync"
-
-	"github.com/containers/storage/pkg/reexec"
-	"github.com/sirupsen/logrus"
-	"golang.org/x/sys/unix"
-)
-
-const (
-	openChrootedCommand = "chrootuser-open"
-)
-
-func init() {
-	reexec.Register(openChrootedCommand, openChrootedFileMain)
-}
-
-func openChrootedFileMain() {
-	status := 0
-	flag.Parse()
-	if len(flag.Args()) < 1 {
-		os.Exit(1)
-	}
-	// Our first parameter is the directory to chroot into.
-	if err := unix.Chdir(flag.Arg(0)); err != nil {
-		fmt.Fprintf(os.Stderr, "chdir(): %v", err)
-		os.Exit(1)
-	}
-	if err := unix.Chroot(flag.Arg(0)); err != nil {
-		fmt.Fprintf(os.Stderr, "chroot(): %v", err)
-		os.Exit(1)
-	}
-	// Anything else is a file we want to dump out.
-	for _, filename := range flag.Args()[1:] {
-		f, err := os.Open(filename)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "open(%q): %v", filename, err)
-			status = 1
-			continue
-		}
-		_, err = io.Copy(os.Stdout, f)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "read(%q): %v", filename, err)
-		}
-		f.Close()
-	}
-	os.Exit(status)
-}
-
-func openChrootedFile(rootdir, filename string) (*exec.Cmd, io.ReadCloser, error) {
-	// The child process expects a chroot and one or more filenames that
-	// will be consulted relative to the chroot directory and concatenated
-	// to its stdout.  Start it up.
-	cmd := reexec.Command(openChrootedCommand, rootdir, filename)
-	stdout, err := cmd.StdoutPipe()
-	if err != nil {
-		return nil, nil, err
-	}
-	err = cmd.Start()
-	if err != nil {
-		return nil, nil, err
-	}
-	// Hand back the child's stdout for reading, and the child to reap.
-	return cmd, stdout, nil
-}
-
-var (
-	lookupUser, lookupGroup sync.Mutex
-)
-
-type lookupPasswdEntry struct {
-	name string
-	uid  uint64
-	gid  uint64
-}
-type lookupGroupEntry struct {
-	name string
-	gid  uint64
-	user string
-}
-
-func readWholeLine(rc *bufio.Reader) ([]byte, error) {
-	line, isPrefix, err := rc.ReadLine()
-	if err != nil {
-		return nil, err
-	}
-	for isPrefix {
-		// We didn't get a whole line.  Keep reading chunks until we find an end of line, and discard them.
-		for isPrefix {
-			logrus.Debugf("discarding partial line %q", string(line))
-			_, isPrefix, err = rc.ReadLine()
-			if err != nil {
-				return nil, err
-			}
-		}
-		// That last read was the end of a line, so now we try to read the (beginning of?) the next line.
-		line, isPrefix, err = rc.ReadLine()
-		if err != nil {
-			return nil, err
-		}
-	}
-	return line, nil
-}
-
-func parseNextPasswd(rc *bufio.Reader) *lookupPasswdEntry {
-	line, err := readWholeLine(rc)
-	if err != nil {
-		return nil
-	}
-	fields := strings.Split(string(line), ":")
-	if len(fields) < 7 {
-		return nil
-	}
-	uid, err := strconv.ParseUint(fields[2], 10, 32)
-	if err != nil {
-		return nil
-	}
-	gid, err := strconv.ParseUint(fields[3], 10, 32)
-	if err != nil {
-		return nil
-	}
-	return &lookupPasswdEntry{
-		name: fields[0],
-		uid:  uid,
-		gid:  gid,
-	}
-}
-
-func parseNextGroup(rc *bufio.Reader) *lookupGroupEntry {
-	line, err := readWholeLine(rc)
-	if err != nil {
-		return nil
-	}
-	fields := strings.Split(string(line), ":")
-	if len(fields) < 4 {
-		return nil
-	}
-	gid, err := strconv.ParseUint(fields[2], 10, 32)
-	if err != nil {
-		return nil
-	}
-	return &lookupGroupEntry{
-		name: fields[0],
-		gid:  gid,
-		user: fields[3],
-	}
-}
-
-func lookupUserInContainer(rootdir, username string) (uid uint64, gid uint64, err error) {
-	cmd, f, err := openChrootedFile(rootdir, "/etc/passwd")
-	if err != nil {
-		return 0, 0, err
-	}
-	defer func() {
-		_ = cmd.Wait()
-	}()
-	rc := bufio.NewReader(f)
-	defer f.Close()
-
-	lookupUser.Lock()
-	defer lookupUser.Unlock()
-
-	pwd := parseNextPasswd(rc)
-	for pwd != nil {
-		if pwd.name != username {
-			pwd = parseNextPasswd(rc)
-			continue
-		}
-		return pwd.uid, pwd.gid, nil
-	}
-
-	return 0, 0, user.UnknownUserError(fmt.Sprintf("error looking up user %q", username))
-}
-
-func lookupGroupForUIDInContainer(rootdir string, userid uint64) (username string, gid uint64, err error) {
-	cmd, f, err := openChrootedFile(rootdir, "/etc/passwd")
-	if err != nil {
-		return "", 0, err
-	}
-	defer func() {
-		_ = cmd.Wait()
-	}()
-	rc := bufio.NewReader(f)
-	defer f.Close()
-
-	lookupUser.Lock()
-	defer lookupUser.Unlock()
-
-	pwd := parseNextPasswd(rc)
-	for pwd != nil {
-		if pwd.uid != userid {
-			pwd = parseNextPasswd(rc)
-			continue
-		}
-		return pwd.name, pwd.gid, nil
-	}
-
-	return "", 0, ErrNoSuchUser
-}
-
-func lookupAdditionalGroupsForUIDInContainer(rootdir string, userid uint64) (gid []uint32, err error) {
-	// Get the username associated with userid
-	username, _, err := lookupGroupForUIDInContainer(rootdir, userid)
-	if err != nil {
-		return nil, err
-	}
-
-	cmd, f, err := openChrootedFile(rootdir, "/etc/group")
-	if err != nil {
-		return nil, err
-	}
-	defer func() {
-		_ = cmd.Wait()
-	}()
-	rc := bufio.NewReader(f)
-	defer f.Close()
-
-	lookupGroup.Lock()
-	defer lookupGroup.Unlock()
-
-	grp := parseNextGroup(rc)
-	for grp != nil {
-		if strings.Contains(grp.user, username) {
-			gid = append(gid, uint32(grp.gid))
-		}
-		grp = parseNextGroup(rc)
-	}
-	return gid, nil
-}
-
-func lookupGroupInContainer(rootdir, groupname string) (gid uint64, err error) {
-	cmd, f, err := openChrootedFile(rootdir, "/etc/group")
-	if err != nil {
-		return 0, err
-	}
-	defer func() {
-		_ = cmd.Wait()
-	}()
-	rc := bufio.NewReader(f)
-	defer f.Close()
-
-	lookupGroup.Lock()
-	defer lookupGroup.Unlock()
-
-	grp := parseNextGroup(rc)
-	for grp != nil {
-		if grp.name != groupname {
-			grp = parseNextGroup(rc)
-			continue
-		}
-		return grp.gid, nil
-	}
-
-	return 0, user.UnknownGroupError(fmt.Sprintf("error looking up group %q", groupname))
-}
-
-func lookupUIDInContainer(rootdir string, uid uint64) (string, uint64, error) {
-	cmd, f, err := openChrootedFile(rootdir, "/etc/passwd")
-	if err != nil {
-		return "", 0, err
-	}
-	defer func() {
-		_ = cmd.Wait()
-	}()
-	rc := bufio.NewReader(f)
-	defer f.Close()
-
-	lookupUser.Lock()
-	defer lookupUser.Unlock()
-
-	pwd := parseNextPasswd(rc)
-	for pwd != nil {
-		if pwd.uid != uid {
-			pwd = parseNextPasswd(rc)
-			continue
-		}
-		return pwd.name, pwd.gid, nil
-	}
-
-	return "", 0, user.UnknownUserError(fmt.Sprintf("error looking up uid %q", uid))
-}