diff options
Diffstat (limited to 'pkg/rootless')
| -rw-r--r-- | pkg/rootless/rootless_linux.go | 37 | ||||
| -rw-r--r-- | pkg/rootless/rootless_unsupported.go | 5 |
2 files changed, 24 insertions, 18 deletions
diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go index 05d641383..59f2880c3 100644 --- a/pkg/rootless/rootless_linux.go +++ b/pkg/rootless/rootless_linux.go @@ -16,15 +16,14 @@ import ( "strconv" "strings" "sync" - "syscall" "unsafe" "github.com/containers/libpod/pkg/errorhandling" "github.com/containers/storage/pkg/idtools" - "github.com/docker/docker/pkg/signal" "github.com/godbus/dbus" "github.com/pkg/errors" "github.com/sirupsen/logrus" + "golang.org/x/sys/unix" ) /* @@ -130,7 +129,7 @@ func tryMappingTool(tool string, pid int, hostID int, mappings []idtools.IDMap) func readUserNs(path string) (string, error) { b := make([]byte, 256) - _, err := syscall.Readlink(path, b) + _, err := unix.Readlink(path, b) if err != nil { return "", err } @@ -143,7 +142,7 @@ func readUserNsFd(fd uintptr) (string, error) { func getParentUserNs(fd uintptr) (uintptr, error) { const nsGetParent = 0xb702 - ret, _, errno := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(nsGetParent), 0) + ret, _, errno := unix.Syscall(unix.SYS_IOCTL, fd, uintptr(nsGetParent), 0) if errno != 0 { return 0, errno } @@ -179,7 +178,7 @@ func getUserNSFirstChild(fd uintptr) (*os.File, error) { for { nextFd, err := getParentUserNs(fd) if err != nil { - if err == syscall.ENOTTY { + if err == unix.ENOTTY { return os.NewFile(fd, "userns child"), nil } return nil, errors.Wrapf(err, "cannot get parent user namespace") @@ -191,14 +190,14 @@ func getUserNSFirstChild(fd uintptr) (*os.File, error) { } if ns == currentNS { - if err := syscall.Close(int(nextFd)); err != nil { + if err := unix.Close(int(nextFd)); err != nil { return nil, err } // Drop O_CLOEXEC for the fd. - _, _, errno := syscall.Syscall(syscall.SYS_FCNTL, fd, syscall.F_SETFD, 0) + _, _, errno := unix.Syscall(unix.SYS_FCNTL, fd, unix.F_SETFD, 0) if errno != 0 { - if err := syscall.Close(int(fd)); err != nil { + if err := unix.Close(int(fd)); err != nil { logrus.Errorf("failed to close file descriptor %d", fd) } return nil, errno @@ -206,7 +205,7 @@ func getUserNSFirstChild(fd uintptr) (*os.File, error) { return os.NewFile(fd, "userns child"), nil } - if err := syscall.Close(int(fd)); err != nil { + if err := unix.Close(int(fd)); err != nil { return nil, err } fd = nextFd @@ -394,7 +393,7 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (bool, runtime.LockOSThread() defer runtime.UnlockOSThread() - fds, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_DGRAM, 0) + fds, err := unix.Socketpair(unix.AF_UNIX, unix.SOCK_DGRAM, 0) if err != nil { return false, -1, err } @@ -431,12 +430,14 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (bool, if err != nil { return false, -1, errors.Wrapf(err, "cannot write setgroups file") } + logrus.Debugf("write setgroups file exited with 0") uidMap := fmt.Sprintf("/proc/%d/uid_map", pid) err = ioutil.WriteFile(uidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Geteuid())), 0666) if err != nil { return false, -1, errors.Wrapf(err, "cannot write uid_map") } + logrus.Debugf("write uid_map exited with 0") } gidsMapped := false @@ -489,21 +490,21 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (bool, signals := []os.Signal{} for sig := 0; sig < numSig; sig++ { - if sig == int(syscall.SIGTSTP) { + if sig == int(unix.SIGTSTP) { continue } - signals = append(signals, syscall.Signal(sig)) + signals = append(signals, unix.Signal(sig)) } gosignal.Notify(c, signals...) defer gosignal.Reset() go func() { for s := range c { - if s == signal.SIGCHLD || s == signal.SIGPIPE { + if s == unix.SIGCHLD || s == unix.SIGPIPE { continue } - if err := syscall.Kill(int(pidC), s.(syscall.Signal)); err != nil { + if err := unix.Kill(int(pidC), s.(unix.Signal)); err != nil { logrus.Errorf("failed to kill %d", int(pidC)) } } @@ -558,7 +559,7 @@ func TryJoinFromFilePaths(pausePidPath string, needNewNamespace bool, paths []st lastErr = nil break } else { - fds, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_DGRAM, 0) + fds, err := unix.Socketpair(unix.AF_UNIX, unix.SOCK_DGRAM, 0) if err != nil { lastErr = err continue @@ -602,7 +603,7 @@ func TryJoinFromFilePaths(pausePidPath string, needNewNamespace bool, paths []st return joinUserAndMountNS(uint(pausePid), pausePidPath) } -func readMappingsProc(path string) ([]idtools.IDMap, error) { +func ReadMappingsProc(path string) ([]idtools.IDMap, error) { file, err := os.Open(path) if err != nil { return nil, errors.Wrapf(err, "cannot open %s", path) @@ -668,7 +669,7 @@ func ConfigurationMatches() (bool, error) { return false, err } - currentUIDs, err := readMappingsProc("/proc/self/uid_map") + currentUIDs, err := ReadMappingsProc("/proc/self/uid_map") if err != nil { return false, err } @@ -677,7 +678,7 @@ func ConfigurationMatches() (bool, error) { return false, err } - currentGIDs, err := readMappingsProc("/proc/self/gid_map") + currentGIDs, err := ReadMappingsProc("/proc/self/gid_map") if err != nil { return false, err } diff --git a/pkg/rootless/rootless_unsupported.go b/pkg/rootless/rootless_unsupported.go index ddd9182b0..ce488f364 100644 --- a/pkg/rootless/rootless_unsupported.go +++ b/pkg/rootless/rootless_unsupported.go @@ -65,3 +65,8 @@ func ConfigurationMatches() (bool, error) { func GetConfiguredMappings() ([]idtools.IDMap, []idtools.IDMap, error) { return nil, nil, errors.New("this function is not supported on this os") } + +// ReadMappingsProc returns the uid_map and gid_map +func ReadMappingsProc(path string) ([]idtools.IDMap, error) { + return nil, nil +} |