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-rw-r--r--pkg/api/handlers/compat/containers_archive.go319
-rw-r--r--pkg/copy/copy.go188
-rw-r--r--pkg/copy/item.go601
-rw-r--r--pkg/domain/entities/containers.go10
-rw-r--r--pkg/domain/entities/engine_container.go2
-rw-r--r--pkg/domain/infra/abi/cp.go439
-rw-r--r--pkg/domain/infra/tunnel/containers.go4
7 files changed, 890 insertions, 673 deletions
diff --git a/pkg/api/handlers/compat/containers_archive.go b/pkg/api/handlers/compat/containers_archive.go
index 1dd563393..223eb2cd5 100644
--- a/pkg/api/handlers/compat/containers_archive.go
+++ b/pkg/api/handlers/compat/containers_archive.go
@@ -5,24 +5,16 @@ import (
"encoding/base64"
"encoding/json"
"fmt"
- "path/filepath"
- "strings"
-
- "github.com/containers/buildah/copier"
- "github.com/containers/buildah/pkg/chrootuser"
- "github.com/containers/podman/v2/libpod"
- "github.com/containers/podman/v2/libpod/define"
- "github.com/containers/podman/v2/pkg/api/handlers/utils"
- "github.com/containers/storage/pkg/idtools"
- "github.com/opencontainers/runtime-spec/specs-go"
-
"net/http"
"os"
"time"
+ "github.com/containers/podman/v2/libpod"
+ "github.com/containers/podman/v2/libpod/define"
+ "github.com/containers/podman/v2/pkg/api/handlers/utils"
+ "github.com/containers/podman/v2/pkg/copy"
"github.com/gorilla/schema"
"github.com/pkg/errors"
- "github.com/sirupsen/logrus"
)
func Archive(w http.ResponseWriter, r *http.Request) {
@@ -32,14 +24,14 @@ func Archive(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case http.MethodPut:
handlePut(w, r, decoder, runtime)
- case http.MethodGet, http.MethodHead:
- handleHeadOrGet(w, r, decoder, runtime)
+ case http.MethodHead, http.MethodGet:
+ handleHeadAndGet(w, r, decoder, runtime)
default:
- utils.Error(w, fmt.Sprintf("not implemented, method: %v", r.Method), http.StatusNotImplemented, errors.New(fmt.Sprintf("not implemented, method: %v", r.Method)))
+ utils.Error(w, fmt.Sprintf("unsupported method: %v", r.Method), http.StatusNotImplemented, errors.New(fmt.Sprintf("unsupported method: %v", r.Method)))
}
}
-func handleHeadOrGet(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) {
+func handleHeadAndGet(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) {
query := struct {
Path string `schema:"path"`
}{}
@@ -66,170 +58,62 @@ func handleHeadOrGet(w http.ResponseWriter, r *http.Request, decoder *schema.Dec
return
}
- mountPoint, err := ctr.Mount()
+ source, err := copy.CopyItemForContainer(ctr, query.Path, true, true)
+ defer source.CleanUp()
if err != nil {
- utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to mount the container"))
+ utils.Error(w, "Not found.", http.StatusNotFound, errors.Wrapf(err, "error stating container path %q", query.Path))
return
}
- defer func() {
- if err := ctr.Unmount(false); err != nil {
- logrus.Warnf("failed to unmount container %s: %q", containerName, err)
- }
- }()
-
- opts := copier.StatOptions{}
-
- mountPoint, path, err := fixUpMountPointAndPath(runtime, ctr, mountPoint, query.Path)
+ // NOTE: Docker always sets the header.
+ info, err := source.Stat()
if err != nil {
- utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+ utils.Error(w, "Not found.", http.StatusNotFound, errors.Wrapf(err, "error stating container path %q", query.Path))
return
}
-
- stats, err := copier.Stat(mountPoint, "", opts, []string{filepath.Join(mountPoint, path)})
+ statHeader, err := fileInfoToDockerStats(info)
if err != nil {
- utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to get stats about file"))
- return
- }
-
- if len(stats) <= 0 || len(stats[0].Globbed) <= 0 {
- errs := make([]string, 0, len(stats))
-
- for _, stat := range stats {
- if stat.Error != "" {
- errs = append(errs, stat.Error)
- }
- }
-
- utils.Error(w, "Not found.", http.StatusNotFound, fmt.Errorf("file doesn't exist (errs: %q)", strings.Join(errs, ";")))
-
- return
- }
-
- statHeader, err := statsToHeader(stats[0].Results[stats[0].Globbed[0]])
- if err != nil {
- utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
+ utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
return
}
-
w.Header().Add("X-Docker-Container-Path-Stat", statHeader)
- if r.Method == http.MethodGet {
- idMappingOpts, err := ctr.IDMappings()
- if err != nil {
- utils.Error(w, "Not found.", http.StatusInternalServerError,
- errors.Wrapf(err, "error getting IDMappingOptions"))
- return
- }
-
- destOwner := idtools.IDPair{UID: os.Getuid(), GID: os.Getgid()}
-
- opts := copier.GetOptions{
- UIDMap: idMappingOpts.UIDMap,
- GIDMap: idMappingOpts.GIDMap,
- ChownDirs: &destOwner,
- ChownFiles: &destOwner,
- KeepDirectoryNames: true,
- }
-
- w.WriteHeader(http.StatusOK)
-
- err = copier.Get(mountPoint, "", opts, []string{filepath.Join(mountPoint, path)}, w)
- if err != nil {
- logrus.Error(errors.Wrapf(err, "failed to copy from the %s container path %s", containerName, query.Path))
- return
- }
- } else {
+ // Our work is done when the user is interested in the header only.
+ if r.Method == http.MethodHead {
w.WriteHeader(http.StatusOK)
- }
-}
-
-func handlePut(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) {
- query := struct {
- Path string `schema:"path"`
- // TODO handle params below
- NoOverwriteDirNonDir bool `schema:"noOverwriteDirNonDir"`
- CopyUIDGID bool `schema:"copyUIDGID"`
- }{}
-
- err := decoder.Decode(&query, r.URL.Query())
- if err != nil {
- utils.Error(w, "Bad Request.", http.StatusBadRequest, errors.Wrap(err, "couldn't decode the query"))
return
}
- ctrName := utils.GetName(r)
-
- ctr, err := runtime.LookupContainer(ctrName)
- if err != nil {
- utils.Error(w, "Not found", http.StatusNotFound, errors.Wrapf(err, "the %s container doesn't exists", ctrName))
- return
- }
-
- mountPoint, err := ctr.Mount()
- if err != nil {
- utils.Error(w, "Something went wrong", http.StatusInternalServerError, errors.Wrapf(err, "failed to mount the %s container", ctrName))
- return
- }
-
- defer func() {
- if err := ctr.Unmount(false); err != nil {
- logrus.Warnf("failed to unmount container %s", ctrName)
- }
- }()
-
- user, err := getUser(mountPoint, ctr.User())
- if err != nil {
- utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
- return
- }
-
- idMappingOpts, err := ctr.IDMappings()
- if err != nil {
- utils.Error(w, "Something went wrong", http.StatusInternalServerError, errors.Wrapf(err, "error getting IDMappingOptions"))
- return
- }
-
- destOwner := idtools.IDPair{UID: int(user.UID), GID: int(user.GID)}
-
- opts := copier.PutOptions{
- UIDMap: idMappingOpts.UIDMap,
- GIDMap: idMappingOpts.GIDMap,
- ChownDirs: &destOwner,
- ChownFiles: &destOwner,
- }
-
- mountPoint, path, err := fixUpMountPointAndPath(runtime, ctr, mountPoint, query.Path)
+ // Alright, the users wants data from the container.
+ destination, err := copy.CopyItemForWriter(w)
if err != nil {
utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
return
}
w.WriteHeader(http.StatusOK)
-
- err = copier.Put(mountPoint, filepath.Join(mountPoint, path), opts, r.Body)
- if err != nil {
- logrus.Error(errors.Wrapf(err, "failed to copy to the %s container path %s", ctrName, query.Path))
+ if err := copy.Copy(&source, &destination, false); err != nil {
+ utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
return
}
}
-func statsToHeader(stats *copier.StatForItem) (string, error) {
- statsDTO := struct {
+func fileInfoToDockerStats(info *copy.FileInfo) (string, error) {
+ dockerStats := struct {
Name string `json:"name"`
Size int64 `json:"size"`
Mode os.FileMode `json:"mode"`
ModTime time.Time `json:"mtime"`
LinkTarget string `json:"linkTarget"`
}{
- Name: filepath.Base(stats.Name),
- Size: stats.Size,
- Mode: stats.Mode,
- ModTime: stats.ModTime,
- LinkTarget: stats.ImmediateTarget,
+ Name: info.Name,
+ Size: info.Size,
+ Mode: info.Mode,
+ ModTime: info.ModTime,
+ LinkTarget: info.LinkTarget,
}
- jsonBytes, err := json.Marshal(&statsDTO)
+ jsonBytes, err := json.Marshal(&dockerStats)
if err != nil {
return "", errors.Wrap(err, "failed to serialize file stats")
}
@@ -250,130 +134,45 @@ func statsToHeader(stats *copier.StatForItem) (string, error) {
return buff.String(), nil
}
-// the utility functions below are copied from abi/cp.go
-
-func getUser(mountPoint string, userspec string) (specs.User, error) {
- uid, gid, _, err := chrootuser.GetUser(mountPoint, userspec)
- u := specs.User{
- UID: uid,
- GID: gid,
- Username: userspec,
- }
-
- if !strings.Contains(userspec, ":") {
- groups, err2 := chrootuser.GetAdditionalGroupsForUser(mountPoint, uint64(u.UID))
- if err2 != nil {
- if errors.Cause(err2) != chrootuser.ErrNoSuchUser && err == nil {
- err = err2
- }
- } else {
- u.AdditionalGids = groups
- }
- }
-
- return u, err
-}
-
-func fixUpMountPointAndPath(runtime *libpod.Runtime, ctr *libpod.Container, mountPoint, ctrPath string) (string, string, error) {
- if !filepath.IsAbs(ctrPath) {
- endsWithSep := strings.HasSuffix(ctrPath, string(filepath.Separator))
- ctrPath = filepath.Join(ctr.WorkingDir(), ctrPath)
-
- if endsWithSep {
- ctrPath = ctrPath + string(filepath.Separator)
- }
- }
- if isVol, volDestName, volName := isVolumeDestName(ctrPath, ctr); isVol { //nolint(gocritic)
- newMountPoint, path, err := pathWithVolumeMount(runtime, volDestName, volName, ctrPath)
- if err != nil {
- return "", "", errors.Wrapf(err, "error getting source path from volume %s", volDestName)
- }
-
- mountPoint = newMountPoint
- ctrPath = path
- } else if isBindMount, mount := isBindMountDestName(ctrPath, ctr); isBindMount { //nolint(gocritic)
- newMountPoint, path := pathWithBindMountSource(mount, ctrPath)
- mountPoint = newMountPoint
- ctrPath = path
- }
-
- return mountPoint, ctrPath, nil
-}
-
-func isVolumeDestName(path string, ctr *libpod.Container) (bool, string, string) {
- separator := string(os.PathSeparator)
-
- if filepath.IsAbs(path) {
- path = strings.TrimPrefix(path, separator)
- }
-
- if path == "" {
- return false, "", ""
- }
-
- for _, vol := range ctr.Config().NamedVolumes {
- volNamePath := strings.TrimPrefix(vol.Dest, separator)
- if matchVolumePath(path, volNamePath) {
- return true, vol.Dest, vol.Name
- }
- }
-
- return false, "", ""
-}
+func handlePut(w http.ResponseWriter, r *http.Request, decoder *schema.Decoder, runtime *libpod.Runtime) {
+ query := struct {
+ Path string `schema:"path"`
+ // TODO handle params below
+ NoOverwriteDirNonDir bool `schema:"noOverwriteDirNonDir"`
+ CopyUIDGID bool `schema:"copyUIDGID"`
+ }{}
-func pathWithVolumeMount(runtime *libpod.Runtime, volDestName, volName, path string) (string, string, error) {
- destVolume, err := runtime.GetVolume(volName)
+ err := decoder.Decode(&query, r.URL.Query())
if err != nil {
- return "", "", errors.Wrapf(err, "error getting volume destination %s", volName)
- }
-
- if !filepath.IsAbs(path) {
- path = filepath.Join(string(os.PathSeparator), path)
+ utils.Error(w, "Bad Request.", http.StatusBadRequest, errors.Wrap(err, "couldn't decode the query"))
+ return
}
- return destVolume.MountPoint(), strings.TrimPrefix(path, volDestName), err
-}
-
-func isBindMountDestName(path string, ctr *libpod.Container) (bool, specs.Mount) {
- separator := string(os.PathSeparator)
-
- if filepath.IsAbs(path) {
- path = strings.TrimPrefix(path, string(os.PathSeparator))
- }
+ ctrName := utils.GetName(r)
- if path == "" {
- return false, specs.Mount{}
+ ctr, err := runtime.LookupContainer(ctrName)
+ if err != nil {
+ utils.Error(w, "Not found", http.StatusNotFound, errors.Wrapf(err, "the %s container doesn't exists", ctrName))
+ return
}
- for _, m := range ctr.Config().Spec.Mounts {
- if m.Type != "bind" {
- continue
- }
-
- mDest := strings.TrimPrefix(m.Destination, separator)
- if matchVolumePath(path, mDest) {
- return true, m
- }
+ destination, err := copy.CopyItemForContainer(ctr, query.Path, true, false)
+ defer destination.CleanUp()
+ if err != nil {
+ utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
+ return
}
- return false, specs.Mount{}
-}
-
-func matchVolumePath(path, target string) bool {
- pathStr := filepath.Clean(path)
- target = filepath.Clean(target)
-
- for len(pathStr) > len(target) && strings.Contains(pathStr, string(os.PathSeparator)) {
- pathStr = pathStr[:strings.LastIndex(pathStr, string(os.PathSeparator))]
+ source, err := copy.CopyItemForReader(r.Body)
+ defer source.CleanUp()
+ if err != nil {
+ utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
+ return
}
- return pathStr == target
-}
-
-func pathWithBindMountSource(m specs.Mount, path string) (string, string) {
- if !filepath.IsAbs(path) {
- path = filepath.Join(string(os.PathSeparator), path)
+ w.WriteHeader(http.StatusOK)
+ if err := copy.Copy(&source, &destination, false); err != nil {
+ utils.Error(w, "Something went wrong", http.StatusInternalServerError, err)
+ return
}
-
- return m.Source, strings.TrimPrefix(path, m.Destination)
}
diff --git a/pkg/copy/copy.go b/pkg/copy/copy.go
new file mode 100644
index 000000000..0e68eb450
--- /dev/null
+++ b/pkg/copy/copy.go
@@ -0,0 +1,188 @@
+package copy
+
+import (
+ "io"
+ "os"
+ "path/filepath"
+ "strings"
+
+ buildahCopiah "github.com/containers/buildah/copier"
+ "github.com/containers/storage/pkg/archive"
+ securejoin "github.com/cyphar/filepath-securejoin"
+ "github.com/pkg/errors"
+)
+
+// ********************************* NOTE *************************************
+//
+// Most security bugs are caused by attackers playing around with symlinks
+// trying to escape from the container onto the host and/or trick into data
+// corruption on the host. Hence, file operations on containers (including
+// *stat) should always be handled by `github.com/containers/buildah/copier`
+// which makes sure to evaluate files in a chroot'ed environment.
+//
+// Please make sure to add verbose comments when changing code to make the
+// lives of future readers easier.
+//
+// ****************************************************************************
+
+// Copy the source item to destination. Use extract to untar the source if
+// it's a tar archive.
+func Copy(source *CopyItem, destination *CopyItem, extract bool) error {
+ // First, do the man-page dance. See podman-cp(1) for details.
+ if err := enforceCopyRules(source, destination); err != nil {
+ return err
+ }
+
+ // Destination is a stream (e.g., stdout or an http body).
+ if destination.info.IsStream {
+ // Source is a stream (e.g., stdin or an http body).
+ if source.info.IsStream {
+ _, err := io.Copy(destination.writer, source.reader)
+ return err
+ }
+ root, glob, err := source.buildahGlobs()
+ if err != nil {
+ return err
+ }
+ return buildahCopiah.Get(root, "", source.getOptions(), []string{glob}, destination.writer)
+ }
+
+ // Destination is either a file or a directory.
+ if source.info.IsStream {
+ return buildahCopiah.Put(destination.root, destination.resolved, source.putOptions(), source.reader)
+ }
+
+ tarOptions := &archive.TarOptions{
+ Compression: archive.Uncompressed,
+ CopyPass: true,
+ }
+
+ root := destination.root
+ dir := destination.resolved
+ if !source.info.IsDir {
+ // When copying a file, make sure to rename the
+ // destination base path.
+ nameMap := make(map[string]string)
+ nameMap[filepath.Base(source.resolved)] = filepath.Base(destination.resolved)
+ tarOptions.RebaseNames = nameMap
+ dir = filepath.Dir(dir)
+ }
+
+ var tarReader io.ReadCloser
+ if extract && archive.IsArchivePath(source.resolved) {
+ if !destination.info.IsDir {
+ return errors.Errorf("cannot extract archive %q to file %q", source.original, destination.original)
+ }
+
+ reader, err := os.Open(source.resolved)
+ if err != nil {
+ return err
+ }
+ defer reader.Close()
+
+ // The stream from stdin may be compressed (e.g., via gzip).
+ decompressedStream, err := archive.DecompressStream(reader)
+ if err != nil {
+ return err
+ }
+
+ defer decompressedStream.Close()
+ tarReader = decompressedStream
+ } else {
+ reader, err := archive.TarWithOptions(source.resolved, tarOptions)
+ if err != nil {
+ return err
+ }
+ defer reader.Close()
+ tarReader = reader
+ }
+
+ return buildahCopiah.Put(root, dir, source.putOptions(), tarReader)
+}
+
+// enforceCopyRules enforces the rules for copying from a source to a
+// destination as mentioned in the podman-cp(1) man page. Please refer to the
+// man page and/or the inline comments for further details. Note that source
+// and destination are passed by reference and the their data may be changed.
+func enforceCopyRules(source, destination *CopyItem) error {
+ if source.statError != nil {
+ return source.statError
+ }
+
+ // We can copy everything to a stream.
+ if destination.info.IsStream {
+ return nil
+ }
+
+ // Source is a *stream*.
+ if source.info.IsStream {
+ if !(destination.info.IsDir || destination.info.IsStream) {
+ return errors.New("destination must be a directory or stream when copying from a stream")
+ }
+ return nil
+ }
+
+ // Source is a *directory*.
+ if source.info.IsDir {
+ if destination.statError != nil {
+ // It's okay if the destination does not exist. We
+ // made sure before that it's parent exists, so it
+ // would be created while copying.
+ if os.IsNotExist(destination.statError) {
+ return nil
+ }
+ // Could be a permission error.
+ return destination.statError
+ }
+
+ // If the destination exists and is not a directory, we have a
+ // problem.
+ if !destination.info.IsDir {
+ return errors.Errorf("cannot copy directory %q to file %q", source.original, destination.original)
+ }
+
+ // If the destination exists and is a directory, we need to
+ // append the source base directory to it. This makes sure
+ // that copying "/foo/bar" "/tmp" will copy to "/tmp/bar" (and
+ // not "/tmp").
+ newDestination, err := securejoin.SecureJoin(destination.resolved, filepath.Base(source.resolved))
+ if err != nil {
+ return err
+ }
+ destination.resolved = newDestination
+ return nil
+ }
+
+ // Source is a *file*.
+ if destination.statError != nil {
+ // It's okay if the destination does not exist, unless it ends
+ // with "/".
+ if !os.IsNotExist(destination.statError) {
+ return destination.statError
+ } else if strings.HasSuffix(destination.resolved, "/") {
+ // Note: this is practically unreachable code as the
+ // existence of parent directories is enforced early
+ // on. It's left here as an extra security net.
+ return errors.Errorf("destination directory %q must exist (trailing %q)", destination.original, "/")
+ }
+ // Does not exist and does not end with "/".
+ return nil
+ }
+
+ // If the destination is a file, we're good. We will overwrite the
+ // contents while copying.
+ if !destination.info.IsDir {
+ return nil
+ }
+
+ // If the destination exists and is a directory, we need to append the
+ // source base directory to it. This makes sure that copying
+ // "/foo/bar" "/tmp" will copy to "/tmp/bar" (and not "/tmp").
+ newDestination, err := securejoin.SecureJoin(destination.resolved, filepath.Base(source.resolved))
+ if err != nil {
+ return err
+ }
+
+ destination.resolved = newDestination
+ return nil
+}
diff --git a/pkg/copy/item.go b/pkg/copy/item.go
new file mode 100644
index 000000000..db6bca610
--- /dev/null
+++ b/pkg/copy/item.go
@@ -0,0 +1,601 @@
+package copy
+
+import (
+ "io"
+ "os"
+ "path/filepath"
+ "strings"
+ "time"
+
+ buildahCopiah "github.com/containers/buildah/copier"
+ "github.com/containers/buildah/pkg/chrootuser"
+ "github.com/containers/buildah/util"
+ "github.com/containers/podman/v2/libpod"
+ "github.com/containers/podman/v2/libpod/define"
+ "github.com/containers/podman/v2/pkg/cgroups"
+ "github.com/containers/podman/v2/pkg/rootless"
+ "github.com/containers/storage"
+ "github.com/containers/storage/pkg/archive"
+ "github.com/containers/storage/pkg/idtools"
+ securejoin "github.com/cyphar/filepath-securejoin"
+ "github.com/opencontainers/runtime-spec/specs-go"
+ "github.com/pkg/errors"
+ "github.com/sirupsen/logrus"
+)
+
+// ********************************* NOTE *************************************
+//
+// Most security bugs are caused by attackers playing around with symlinks
+// trying to escape from the container onto the host and/or trick into data
+// corruption on the host. Hence, file operations on containers (including
+// *stat) should always be handled by `github.com/containers/buildah/copier`
+// which makes sure to evaluate files in a chroot'ed environment.
+//
+// Please make sure to add verbose comments when changing code to make the
+// lives of future readers easier.
+//
+// ****************************************************************************
+
+var (
+ _stdin = os.Stdin.Name()
+ _stdout = os.Stdout.Name()
+)
+
+// CopyItem is the source or destination of a copy operation. Use the
+// CopyItemFrom* functions to create one for the specific source/destination
+// item.
+type CopyItem struct {
+ // The original path provided by the caller. Useful in error messages.
+ original string
+ // The resolved path on the host or container. Maybe altered at
+ // multiple stages when copying.
+ resolved string
+ // The root for copying data in a chroot'ed environment.
+ root string
+
+ // IDPair of the resolved path.
+ idPair *idtools.IDPair
+ // Storage ID mappings.
+ idMappings *storage.IDMappingOptions
+
+ // Internal FileInfo. We really don't want users to mess with a
+ // CopyItem but only plug and play with it.
+ info FileInfo
+ // Error when creating the upper FileInfo. Some errors are non-fatal,
+ // for instance, when a destination *base* path does not exist.
+ statError error
+
+ writer io.Writer
+ reader io.Reader
+
+ // Needed to clean up resources (e.g., unmount a container).
+ cleanUpFuncs []deferFunc
+}
+
+// deferFunc allows for returning functions that must be deferred at call sites.
+type deferFunc func()
+
+// FileInfo describes a file or directory and is returned by
+// (*CopyItem).Stat().
+type FileInfo struct {
+ Name string `json:"name"`
+ Size int64 `json:"size"`
+ Mode os.FileMode `json:"mode"`
+ ModTime time.Time `json:"mtime"`
+ IsDir bool `json:"isDir"`
+ IsStream bool `json:"isStream"`
+ LinkTarget string `json:"linkTarget"`
+}
+
+// Stat returns the FileInfo.
+func (item *CopyItem) Stat() (*FileInfo, error) {
+ return &item.info, item.statError
+}
+
+// CleanUp releases resources such as the container mounts. It *must* be
+// called even in case of errors.
+func (item *CopyItem) CleanUp() {
+ for _, f := range item.cleanUpFuncs {
+ f()
+ }
+}
+
+// CopyItemForWriter returns a CopyItem for the specified io.WriteCloser. Note
+// that the returned item can only act as a copy destination.
+func CopyItemForWriter(writer io.Writer) (item CopyItem, _ error) {
+ item.writer = writer
+ item.info.IsStream = true
+ return item, nil
+}
+
+// CopyItemForReader returns a CopyItem for the specified io.ReaderCloser. Note
+// that the returned item can only act as a copy source.
+//
+// Note that the specified reader will be auto-decompressed if needed.
+func CopyItemForReader(reader io.Reader) (item CopyItem, _ error) {
+ item.info.IsStream = true
+ decompressed, err := archive.DecompressStream(reader)
+ if err != nil {
+ return item, err
+ }
+ item.reader = decompressed
+ item.cleanUpFuncs = append(item.cleanUpFuncs, func() {
+ if err := decompressed.Close(); err != nil {
+ logrus.Errorf("Error closing decompressed reader of copy item: %v", err)
+ }
+ })
+ return item, nil
+}
+
+// CopyItemForHost creates a CopyItem for the specified host path. It's a
+// destination by default. Use isSource to set it as a destination.
+//
+// Note that callers *must* call (CopyItem).CleanUp(), even in case of errors.
+func CopyItemForHost(hostPath string, isSource bool) (item CopyItem, _ error) {
+ if hostPath == "-" {
+ if isSource {
+ hostPath = _stdin
+ } else {
+ hostPath = _stdout
+ }
+ }
+
+ if hostPath == _stdin {
+ return CopyItemForReader(os.Stdin)
+ }
+
+ if hostPath == _stdout {
+ return CopyItemForWriter(os.Stdout)
+ }
+
+ // Now do the dance for the host data.
+ resolvedHostPath, err := filepath.Abs(hostPath)
+ if err != nil {
+ return item, err
+ }
+
+ resolvedHostPath = preserveBasePath(hostPath, resolvedHostPath)
+ item.original = hostPath
+ item.resolved = resolvedHostPath
+ item.root = "/"
+
+ statInfo, statError := os.Stat(resolvedHostPath)
+ item.statError = statError
+
+ // It exists, we're done.
+ if statError == nil {
+ item.info.Name = statInfo.Name()
+ item.info.Size = statInfo.Size()
+ item.info.Mode = statInfo.Mode()
+ item.info.ModTime = statInfo.ModTime()
+ item.info.IsDir = statInfo.IsDir()
+ item.info.LinkTarget = resolvedHostPath
+ return item, nil
+ }
+
+ // The source must exist, but let's try to give some human-friendly
+ // errors.
+ if isSource {
+ if os.IsNotExist(item.statError) {
+ return item, errors.Wrapf(os.ErrNotExist, "%q could not be found on the host", hostPath)
+ }
+ return item, item.statError // could be a permission error
+ }
+
+ // If we're a destination, we need to make sure that the parent
+ // directory exists.
+ parent := filepath.Dir(resolvedHostPath)
+ if _, err := os.Stat(parent); err != nil {
+ if os.IsNotExist(err) {
+ return item, errors.Wrapf(os.ErrNotExist, "%q could not be found on the host", parent)
+ }
+ return item, err
+ }
+
+ return item, nil
+}
+
+// CopyItemForContainer creates a CopyItem for the specified path on the
+// container. It's a destination by default. Use isSource to set it as a
+// destination. Note that the container path may resolve to a path outside of
+// the container's mount point if the path hits a volume or mount on the
+// container.
+//
+// Note that callers *must* call (CopyItem).CleanUp(), even in case of errors.
+func CopyItemForContainer(container *libpod.Container, containerPath string, pause bool, isSource bool) (item CopyItem, _ error) {
+ // Mount and pause the container.
+ containerMountPoint, err := item.mountAndPauseContainer(container, pause)
+ if err != nil {
+ return item, err
+ }
+
+ // Make sure that "/" copies the *contents* of the mount point and not
+ // the directory.
+ if containerPath == "/" {
+ containerPath += "/."
+ }
+
+ // Now resolve the container's path. It may hit a volume, it may hit a
+ // bind mount, it may be relative.
+ resolvedRoot, resolvedContainerPath, err := resolveContainerPaths(container, containerMountPoint, containerPath)
+ if err != nil {
+ return item, err
+ }
+ resolvedContainerPath = preserveBasePath(containerPath, resolvedContainerPath)
+
+ idMappings, idPair, err := getIDMappingsAndPair(container, containerMountPoint)
+ if err != nil {
+ return item, err
+ }
+
+ item.original = containerPath
+ item.resolved = resolvedContainerPath
+ item.root = resolvedRoot
+ item.idMappings = idMappings
+ item.idPair = idPair
+
+ statInfo, statError := secureStat(resolvedRoot, resolvedContainerPath)
+ item.statError = statError
+
+ // It exists, we're done.
+ if statError == nil {
+ item.info.IsDir = statInfo.IsDir
+ item.info.Name = filepath.Base(statInfo.Name)
+ item.info.Size = statInfo.Size
+ item.info.Mode = statInfo.Mode
+ item.info.ModTime = statInfo.ModTime
+ item.info.IsDir = statInfo.IsDir
+ item.info.LinkTarget = resolvedContainerPath
+ return item, nil
+ }
+
+ // The source must exist, but let's try to give some human-friendly
+ // errors.
+ if isSource {
+ if os.IsNotExist(statError) {
+ return item, errors.Wrapf(os.ErrNotExist, "%q could not be found on container %s (resolved to %q)", containerPath, container.ID(), resolvedContainerPath)
+ }
+ return item, item.statError // could be a permission error
+ }
+
+ // If we're a destination, we need to make sure that the parent
+ // directory exists.
+ parent := filepath.Dir(resolvedContainerPath)
+ if _, err := secureStat(resolvedRoot, parent); err != nil {
+ if os.IsNotExist(err) {
+ return item, errors.Wrapf(os.ErrNotExist, "%q could not be found on container %s (resolved to %q)", containerPath, container.ID(), resolvedContainerPath)
+ }
+ return item, err
+ }
+
+ return item, nil
+}
+
+// putOptions returns PUT options for buildah's copier package.
+func (item *CopyItem) putOptions() buildahCopiah.PutOptions {
+ options := buildahCopiah.PutOptions{}
+ if item.idMappings != nil {
+ options.UIDMap = item.idMappings.UIDMap
+ options.GIDMap = item.idMappings.GIDMap
+ }
+ if item.idPair != nil {
+ options.ChownDirs = item.idPair
+ options.ChownFiles = item.idPair
+ }
+ return options
+}
+
+// getOptions returns GET options for buildah's copier package.
+func (item *CopyItem) getOptions() buildahCopiah.GetOptions {
+ options := buildahCopiah.GetOptions{}
+ if item.idMappings != nil {
+ options.UIDMap = item.idMappings.UIDMap
+ options.GIDMap = item.idMappings.GIDMap
+ }
+ if item.idPair != nil {
+ options.ChownDirs = item.idPair
+ options.ChownFiles = item.idPair
+ }
+ return options
+
+}
+
+// mount and pause the container. Also set the item's cleanUpFuncs. Those
+// *must* be invoked by callers, even in case of errors.
+func (item *CopyItem) mountAndPauseContainer(container *libpod.Container, pause bool) (string, error) {
+ // Make sure to pause and unpause the container. We cannot pause on
+ // cgroupsv1 as rootless user, in which case we turn off pausing.
+ if pause && rootless.IsRootless() {
+ cgroupv2, _ := cgroups.IsCgroup2UnifiedMode()
+ if !cgroupv2 {
+ logrus.Debugf("Cannot pause container for copying as a rootless user on cgroupsv1: default to not pause")
+ pause = false
+ }
+ }
+
+ // Mount and unmount the container.
+ mountPoint, err := container.Mount()
+ if err != nil {
+ return "", err
+ }
+
+ item.cleanUpFuncs = append(item.cleanUpFuncs, func() {
+ if err := container.Unmount(false); err != nil {
+ logrus.Errorf("Error unmounting container after copy operation: %v", err)
+ }
+ })
+
+ // Pause and unpause the container.
+ if pause {
+ if err := container.Pause(); err != nil {
+ // Ignore errors when the container isn't running. No
+ // need to pause.
+ if errors.Cause(err) != define.ErrCtrStateInvalid {
+ return "", err
+ }
+ } else {
+ item.cleanUpFuncs = append(item.cleanUpFuncs, func() {
+ if err := container.Unpause(); err != nil {
+ logrus.Errorf("Error unpausing container after copy operation: %v", err)
+ }
+ })
+ }
+ }
+
+ return mountPoint, nil
+}
+
+// buildahGlobs returns the root, dir and glob used in buildah's copier
+// package.
+//
+// Note that dir is always empty.
+func (item *CopyItem) buildahGlobs() (root string, glob string, err error) {
+ root = item.root
+
+ // If the root and the resolved path are equal, then dir must be empty
+ // and the glob must be ".".
+ if filepath.Clean(root) == filepath.Clean(item.resolved) {
+ glob = "."
+ return
+ }
+
+ glob, err = filepath.Rel(root, item.resolved)
+ return
+}
+
+// preserveBasePath makes sure that the original base path (e.g., "/" or "./")
+// is preserved. The filepath API among tends to clean up a bit too much but
+// we *must* preserve this data by all means.
+func preserveBasePath(original, resolved string) string {
+ // Handle "/"
+ if strings.HasSuffix(original, "/") {
+ if !strings.HasSuffix(resolved, "/") {
+ resolved += "/"
+ }
+ return resolved
+ }
+
+ // Handle "/."
+ if strings.HasSuffix(original, "/.") {
+ if strings.HasSuffix(resolved, "/") { // could be root!
+ resolved += "."
+ } else if !strings.HasSuffix(resolved, "/.") {
+ resolved += "/."
+ }
+ return resolved
+ }
+
+ return resolved
+}
+
+// secureStat extracts file info for path in a chroot'ed environment in root.
+func secureStat(root string, path string) (*buildahCopiah.StatForItem, error) {
+ var glob string
+ var err error
+
+ // If root and path are equal, then dir must be empty and the glob must
+ // be ".".
+ if filepath.Clean(root) == filepath.Clean(path) {
+ glob = "."
+ } else {
+ glob, err = filepath.Rel(root, path)
+ if err != nil {
+ return nil, err
+ }
+ }
+
+ globStats, err := buildahCopiah.Stat(root, "", buildahCopiah.StatOptions{}, []string{glob})
+ if err != nil {
+ return nil, err
+ }
+
+ if len(globStats) != 1 {
+ return nil, errors.Errorf("internal libpod error: secureStat: expected 1 item but got %d", len(globStats))
+ }
+
+ stat, exists := globStats[0].Results[glob] // only one glob passed, so that's okay
+ if !exists {
+ return stat, os.ErrNotExist
+ }
+
+ var statErr error
+ if stat.Error != "" {
+ statErr = errors.New(stat.Error)
+ }
+ return stat, statErr
+}
+
+// resolveContainerPaths resolves the container's mount point and the container
+// path as specified by the user. Both may resolve to paths outside of the
+// container's mount point when the container path hits a volume or bind mount.
+//
+// NOTE: We must take volumes and bind mounts into account as, regrettably, we
+// can copy to/from stopped containers. In that case, the volumes and bind
+// mounts are not present. For running containers, the runtime (e.g., runc or
+// crun) takes care of these mounts. For stopped ones, we need to do quite
+// some dance, as done below.
+func resolveContainerPaths(container *libpod.Container, mountPoint string, containerPath string) (string, string, error) {
+ // Let's first make sure we have a path relative to the mount point.
+ pathRelativeToContainerMountPoint := containerPath
+ if !filepath.IsAbs(containerPath) {
+ // If the containerPath is not absolute, it's relative to the
+ // container's working dir. To be extra careful, let's first
+ // join the working dir with "/", and the add the containerPath
+ // to it.
+ pathRelativeToContainerMountPoint = filepath.Join(filepath.Join("/", container.WorkingDir()), containerPath)
+ }
+ // NOTE: the secure join makes sure that we follow symlinks. This way,
+ // we catch scenarios where the container path symlinks to a volume or
+ // bind mount.
+ resolvedPathOnTheContainerMountPoint, err := securejoin.SecureJoin(mountPoint, pathRelativeToContainerMountPoint)
+ if err != nil {
+ return "", "", err
+ }
+ pathRelativeToContainerMountPoint = strings.TrimPrefix(pathRelativeToContainerMountPoint, mountPoint)
+ pathRelativeToContainerMountPoint = filepath.Join("/", pathRelativeToContainerMountPoint)
+
+ // Now we have an "absolute container Path" but not yet resolved on the
+ // host (e.g., "/foo/bar/file.txt"). As mentioned above, we need to
+ // check if "/foo/bar/file.txt" is on a volume or bind mount. To do
+ // that, we need to walk *down* the paths to the root. Assuming
+ // volume-1 is mounted to "/foo" and volume-2 is mounted to "/foo/bar",
+ // we must select "/foo/bar". Once selected, we need to rebase the
+ // remainder (i.e, "/file.txt") on the volume's mount point on the
+ // host. Same applies to bind mounts.
+
+ searchPath := pathRelativeToContainerMountPoint
+ for {
+ volume, err := findVolume(container, searchPath)
+ if err != nil {
+ return "", "", err
+ }
+ if volume != nil {
+ logrus.Debugf("Container path %q resolved to volume %q on path %q", containerPath, volume.Name(), searchPath)
+ // We found a matching volume for searchPath. We now
+ // need to first find the relative path of our input
+ // path to the searchPath, and then join it with the
+ // volume's mount point.
+ pathRelativeToVolume := strings.TrimPrefix(pathRelativeToContainerMountPoint, searchPath)
+ absolutePathOnTheVolumeMount, err := securejoin.SecureJoin(volume.MountPoint(), pathRelativeToVolume)
+ if err != nil {
+ return "", "", err
+ }
+ return volume.MountPoint(), absolutePathOnTheVolumeMount, nil
+ }
+
+ if mount := findBindMount(container, searchPath); mount != nil {
+ logrus.Debugf("Container path %q resolved to bind mount %q:%q on path %q", containerPath, mount.Source, mount.Destination, searchPath)
+ // We found a matching bind mount for searchPath. We
+ // now need to first find the relative path of our
+ // input path to the searchPath, and then join it with
+ // the source of the bind mount.
+ pathRelativeToBindMount := strings.TrimPrefix(pathRelativeToContainerMountPoint, searchPath)
+ absolutePathOnTheBindMount, err := securejoin.SecureJoin(mount.Source, pathRelativeToBindMount)
+ if err != nil {
+ return "", "", err
+ }
+ return mount.Source, absolutePathOnTheBindMount, nil
+
+ }
+
+ if searchPath == "/" {
+ // Cannot go beyond "/", so we're done.
+ break
+ }
+
+ // Walk *down* the path (e.g., "/foo/bar/x" -> "/foo/bar").
+ searchPath = filepath.Dir(searchPath)
+ }
+
+ // No volume, no bind mount but just a normal path on the container.
+ return mountPoint, resolvedPathOnTheContainerMountPoint, nil
+}
+
+// findVolume checks if the specified container path matches a volume inside
+// the container. It returns a matching volume or nil.
+func findVolume(c *libpod.Container, containerPath string) (*libpod.Volume, error) {
+ runtime := c.Runtime()
+ cleanedContainerPath := filepath.Clean(containerPath)
+ for _, vol := range c.Config().NamedVolumes {
+ if cleanedContainerPath == filepath.Clean(vol.Dest) {
+ return runtime.GetVolume(vol.Name)
+ }
+ }
+ return nil, nil
+}
+
+// findBindMount checks if the specified container path matches a bind mount
+// inside the container. It returns a matching mount or nil.
+func findBindMount(c *libpod.Container, containerPath string) *specs.Mount {
+ cleanedPath := filepath.Clean(containerPath)
+ for _, m := range c.Config().Spec.Mounts {
+ if m.Type != "bind" {
+ continue
+ }
+ if cleanedPath == filepath.Clean(m.Destination) {
+ mount := m
+ return &mount
+ }
+ }
+ return nil
+}
+
+// getIDMappingsAndPair returns the ID mappings for the container and the host
+// ID pair.
+func getIDMappingsAndPair(container *libpod.Container, containerMount string) (*storage.IDMappingOptions, *idtools.IDPair, error) {
+ user, err := getContainerUser(container, containerMount)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ idMappingOpts, err := container.IDMappings()
+ if err != nil {
+ return nil, nil, err
+ }
+
+ hostUID, hostGID, err := util.GetHostIDs(idtoolsToRuntimeSpec(idMappingOpts.UIDMap), idtoolsToRuntimeSpec(idMappingOpts.GIDMap), user.UID, user.GID)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ idPair := idtools.IDPair{UID: int(hostUID), GID: int(hostGID)}
+ return &idMappingOpts, &idPair, nil
+}
+
+// getContainerUser returns the specs.User of the container.
+func getContainerUser(container *libpod.Container, mountPoint string) (specs.User, error) {
+ userspec := container.Config().User
+
+ uid, gid, _, err := chrootuser.GetUser(mountPoint, userspec)
+ u := specs.User{
+ UID: uid,
+ GID: gid,
+ Username: userspec,
+ }
+
+ if !strings.Contains(userspec, ":") {
+ groups, err2 := chrootuser.GetAdditionalGroupsForUser(mountPoint, uint64(u.UID))
+ if err2 != nil {
+ if errors.Cause(err2) != chrootuser.ErrNoSuchUser && err == nil {
+ err = err2
+ }
+ } else {
+ u.AdditionalGids = groups
+ }
+ }
+
+ return u, err
+}
+
+// idtoolsToRuntimeSpec converts idtools ID mapping to the one of the runtime spec.
+func idtoolsToRuntimeSpec(idMaps []idtools.IDMap) (convertedIDMap []specs.LinuxIDMapping) {
+ for _, idmap := range idMaps {
+ tempIDMap := specs.LinuxIDMapping{
+ ContainerID: uint32(idmap.ContainerID),
+ HostID: uint32(idmap.HostID),
+ Size: uint32(idmap.Size),
+ }
+ convertedIDMap = append(convertedIDMap, tempIDMap)
+ }
+ return convertedIDMap
+}
diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index 3fd7c79f4..39d679eaf 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -403,16 +403,14 @@ type ContainerPortReport struct {
Ports []ocicni.PortMapping
}
-// ContainerCpOptions describes input options for cp
+// ContainerCpOptions describes input options for cp.
type ContainerCpOptions struct {
- Pause bool
+ // Pause the container while copying.
+ Pause bool
+ // Extract the tarfile into the destination directory.
Extract bool
}
-// ContainerCpReport describes the output from a cp operation
-type ContainerCpReport struct {
-}
-
// ContainerStatsOptions describes input options for getting
// stats on containers
type ContainerStatsOptions struct {
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index df7da616a..e1f40e307 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -16,7 +16,7 @@ type ContainerEngine interface {
ContainerCheckpoint(ctx context.Context, namesOrIds []string, options CheckpointOptions) ([]*CheckpointReport, error)
ContainerCleanup(ctx context.Context, namesOrIds []string, options ContainerCleanupOptions) ([]*ContainerCleanupReport, error)
ContainerCommit(ctx context.Context, nameOrID string, options CommitOptions) (*CommitReport, error)
- ContainerCp(ctx context.Context, source, dest string, options ContainerCpOptions) (*ContainerCpReport, error)
+ ContainerCp(ctx context.Context, source, dest string, options ContainerCpOptions) error
ContainerCreate(ctx context.Context, s *specgen.SpecGenerator) (*ContainerCreateReport, error)
ContainerDiff(ctx context.Context, nameOrID string, options DiffOptions) (*DiffReport, error)
ContainerExec(ctx context.Context, nameOrID string, options ExecOptions, streams define.AttachStreams) (int, error)
diff --git a/pkg/domain/infra/abi/cp.go b/pkg/domain/infra/abi/cp.go
index 8f4f5d3d7..9409df743 100644
--- a/pkg/domain/infra/abi/cp.go
+++ b/pkg/domain/infra/abi/cp.go
@@ -1,195 +1,70 @@
package abi
import (
- "archive/tar"
"context"
- "fmt"
- "io"
- "os"
- "path/filepath"
"strings"
- "github.com/containers/buildah/pkg/chrootuser"
- "github.com/containers/buildah/util"
"github.com/containers/podman/v2/libpod"
- "github.com/containers/podman/v2/libpod/define"
+ "github.com/containers/podman/v2/pkg/copy"
"github.com/containers/podman/v2/pkg/domain/entities"
- "github.com/containers/storage"
- "github.com/containers/storage/pkg/chrootarchive"
- "github.com/containers/storage/pkg/idtools"
- securejoin "github.com/cyphar/filepath-securejoin"
- "github.com/docker/docker/pkg/archive"
- "github.com/opencontainers/go-digest"
- "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
- "github.com/sirupsen/logrus"
)
-func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string, options entities.ContainerCpOptions) (*entities.ContainerCpReport, error) {
- extract := options.Extract
-
+func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string, options entities.ContainerCpOptions) error {
srcCtr, srcPath := parsePath(ic.Libpod, source)
destCtr, destPath := parsePath(ic.Libpod, dest)
- if (srcCtr == nil && destCtr == nil) || (srcCtr != nil && destCtr != nil) {
- return nil, errors.Errorf("invalid arguments %s, %s you must use just one container", source, dest)
+ if srcCtr != nil && destCtr != nil {
+ return errors.Errorf("invalid arguments %q, %q: you must use just one container", source, dest)
}
-
- if len(srcPath) == 0 || len(destPath) == 0 {
- return nil, errors.Errorf("invalid arguments %s, %s you must specify paths", source, dest)
+ if srcCtr == nil && destCtr == nil {
+ return errors.Errorf("invalid arguments %q, %q: you must specify one container", source, dest)
}
- ctr := srcCtr
- isFromHostToCtr := ctr == nil
- if isFromHostToCtr {
- ctr = destCtr
+ if len(srcPath) == 0 || len(destPath) == 0 {
+ return errors.Errorf("invalid arguments %q, %q: you must specify paths", source, dest)
}
- mountPoint, err := ctr.Mount()
- if err != nil {
- return nil, err
- }
- defer func() {
- if err := ctr.Unmount(false); err != nil {
- logrus.Errorf("unable to umount container '%s': %q", ctr.ID(), err)
+ var sourceItem, destinationItem copy.CopyItem
+ var err error
+ // Copy from the container to the host.
+ if srcCtr != nil {
+ sourceItem, err = copy.CopyItemForContainer(srcCtr, srcPath, options.Pause, true)
+ defer sourceItem.CleanUp()
+ if err != nil {
+ return err
}
- }()
-
- if options.Pause {
- if err := ctr.Pause(); err != nil {
- // An invalid state error is fine.
- // The container isn't running or is already paused.
- // TODO: We can potentially start the container while
- // the copy is running, which still allows a race where
- // malicious code could mess with the symlink.
- if errors.Cause(err) != define.ErrCtrStateInvalid {
- return nil, err
- }
- } else {
- // Only add the defer if we actually paused
- defer func() {
- if err := ctr.Unpause(); err != nil {
- logrus.Errorf("Error unpausing container after copying: %v", err)
- }
- }()
+ } else {
+ sourceItem, err = copy.CopyItemForHost(srcPath, true)
+ if err != nil {
+ return err
}
}
- user, err := getUser(mountPoint, ctr.User())
- if err != nil {
- return nil, err
- }
- idMappingOpts, err := ctr.IDMappings()
- if err != nil {
- return nil, errors.Wrapf(err, "error getting IDMappingOptions")
- }
- destOwner := idtools.IDPair{UID: int(user.UID), GID: int(user.GID)}
- hostUID, hostGID, err := util.GetHostIDs(convertIDMap(idMappingOpts.UIDMap), convertIDMap(idMappingOpts.GIDMap), user.UID, user.GID)
- if err != nil {
- return nil, err
- }
-
- hostOwner := idtools.IDPair{UID: int(hostUID), GID: int(hostGID)}
-
- if isFromHostToCtr {
- if isVol, volDestName, volName := isVolumeDestName(destPath, ctr); isVol { //nolint(gocritic)
- path, err := pathWithVolumeMount(ic.Libpod, volDestName, volName, destPath)
- if err != nil {
- return nil, errors.Wrapf(err, "error getting destination path from volume %s", volDestName)
- }
- destPath = path
- } else if isBindMount, mount := isBindMountDestName(destPath, ctr); isBindMount { //nolint(gocritic)
- path, err := pathWithBindMountSource(mount, destPath)
- if err != nil {
- return nil, errors.Wrapf(err, "error getting destination path from bind mount %s", mount.Destination)
- }
- destPath = path
- } else if filepath.IsAbs(destPath) { //nolint(gocritic)
- cleanedPath, err := securejoin.SecureJoin(mountPoint, destPath)
- if err != nil {
- return nil, err
- }
- destPath = cleanedPath
- } else { //nolint(gocritic)
- ctrWorkDir, err := securejoin.SecureJoin(mountPoint, ctr.WorkingDir())
- if err != nil {
- return nil, err
- }
- if err = idtools.MkdirAllAndChownNew(ctrWorkDir, 0755, hostOwner); err != nil {
- return nil, err
- }
- cleanedPath, err := securejoin.SecureJoin(mountPoint, filepath.Join(ctr.WorkingDir(), destPath))
- if err != nil {
- return nil, err
- }
- destPath = cleanedPath
+ if destCtr != nil {
+ destinationItem, err = copy.CopyItemForContainer(destCtr, destPath, options.Pause, false)
+ defer destinationItem.CleanUp()
+ if err != nil {
+ return err
}
} else {
- destOwner = idtools.IDPair{UID: os.Getuid(), GID: os.Getgid()}
- if isVol, volDestName, volName := isVolumeDestName(srcPath, ctr); isVol { //nolint(gocritic)
- path, err := pathWithVolumeMount(ic.Libpod, volDestName, volName, srcPath)
- if err != nil {
- return nil, errors.Wrapf(err, "error getting source path from volume %s", volDestName)
- }
- srcPath = path
- } else if isBindMount, mount := isBindMountDestName(srcPath, ctr); isBindMount { //nolint(gocritic)
- path, err := pathWithBindMountSource(mount, srcPath)
- if err != nil {
- return nil, errors.Wrapf(err, "error getting source path from bind mount %s", mount.Destination)
- }
- srcPath = path
- } else if filepath.IsAbs(srcPath) { //nolint(gocritic)
- cleanedPath, err := securejoin.SecureJoin(mountPoint, srcPath)
- if err != nil {
- return nil, err
- }
- srcPath = cleanedPath
- } else { //nolint(gocritic)
- cleanedPath, err := securejoin.SecureJoin(mountPoint, filepath.Join(ctr.WorkingDir(), srcPath))
- if err != nil {
- return nil, err
- }
- srcPath = cleanedPath
- }
- }
-
- if !filepath.IsAbs(destPath) {
- dir, err := os.Getwd()
+ destinationItem, err = copy.CopyItemForHost(destPath, false)
+ defer destinationItem.CleanUp()
if err != nil {
- return nil, errors.Wrapf(err, "err getting current working directory")
+ return err
}
- destPath = filepath.Join(dir, destPath)
}
- if source == "-" {
- srcPath = os.Stdin.Name()
- extract = true
- }
- err = containerCopy(srcPath, destPath, source, dest, idMappingOpts, &destOwner, extract, isFromHostToCtr)
- return &entities.ContainerCpReport{}, err
+ // Copy from the host to the container.
+ return copy.Copy(&sourceItem, &destinationItem, options.Extract)
}
-func getUser(mountPoint string, userspec string) (specs.User, error) {
- uid, gid, _, err := chrootuser.GetUser(mountPoint, userspec)
- u := specs.User{
- UID: uid,
- GID: gid,
- Username: userspec,
+func parsePath(runtime *libpod.Runtime, path string) (*libpod.Container, string) {
+ if len(path) == 0 {
+ return nil, ""
}
- if !strings.Contains(userspec, ":") {
- groups, err2 := chrootuser.GetAdditionalGroupsForUser(mountPoint, uint64(u.UID))
- if err2 != nil {
- if errors.Cause(err2) != chrootuser.ErrNoSuchUser && err == nil {
- err = err2
- }
- } else {
- u.AdditionalGids = groups
- }
-
+ if path[0] == '.' || path[0] == '/' { // A path cannot point to a container.
+ return nil, path
}
- return u, err
-}
-
-func parsePath(runtime *libpod.Runtime, path string) (*libpod.Container, string) {
pathArr := strings.SplitN(path, ":", 2)
if len(pathArr) == 2 {
ctr, err := runtime.LookupContainer(pathArr[0])
@@ -199,247 +74,3 @@ func parsePath(runtime *libpod.Runtime, path string) (*libpod.Container, string)
}
return nil, path
}
-
-func evalSymlinks(path string) (string, error) {
- if path == os.Stdin.Name() {
- return path, nil
- }
- return filepath.EvalSymlinks(path)
-}
-
-func getPathInfo(path string) (string, os.FileInfo, error) {
- path, err := evalSymlinks(path)
- if err != nil {
- return "", nil, errors.Wrapf(err, "error evaluating symlinks %q", path)
- }
- srcfi, err := os.Stat(path)
- if err != nil {
- return "", nil, err
- }
- return path, srcfi, nil
-}
-
-func containerCopy(srcPath, destPath, src, dest string, idMappingOpts storage.IDMappingOptions, chownOpts *idtools.IDPair, extract, isFromHostToCtr bool) error {
- srcPath, err := evalSymlinks(srcPath)
- if err != nil {
- return errors.Wrapf(err, "error evaluating symlinks %q", srcPath)
- }
-
- srcPath, srcfi, err := getPathInfo(srcPath)
- if err != nil {
- return err
- }
-
- filename := filepath.Base(destPath)
- if filename == "-" && !isFromHostToCtr {
- err := streamFileToStdout(srcPath, srcfi)
- if err != nil {
- return errors.Wrapf(err, "error streaming source file %s to Stdout", srcPath)
- }
- return nil
- }
-
- destdir := destPath
- if !srcfi.IsDir() {
- destdir = filepath.Dir(destPath)
- }
- _, err = os.Stat(destdir)
- if err != nil && !os.IsNotExist(err) {
- return err
- }
- destDirIsExist := err == nil
- if err = os.MkdirAll(destdir, 0755); err != nil {
- return err
- }
-
- // return functions for copying items
- copyFileWithTar := chrootarchive.CopyFileWithTarAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
- copyWithTar := chrootarchive.CopyWithTarAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
- untarPath := chrootarchive.UntarPathAndChown(chownOpts, digest.Canonical.Digester().Hash(), idMappingOpts.UIDMap, idMappingOpts.GIDMap)
-
- if srcfi.IsDir() {
- logrus.Debugf("copying %q to %q", srcPath+string(os.PathSeparator)+"*", dest+string(os.PathSeparator)+"*")
- if destDirIsExist && !strings.HasSuffix(src, fmt.Sprintf("%s.", string(os.PathSeparator))) {
- srcPathBase := filepath.Base(srcPath)
- if !isFromHostToCtr {
- pathArr := strings.SplitN(src, ":", 2)
- if len(pathArr) != 2 {
- return errors.Errorf("invalid arguments %s, you must specify source path", src)
- }
- if pathArr[1] == "/" {
- // If `srcPath` is the root directory of the container,
- // `srcPath` will be `.../${sha256_ID}/merged/`, so do not join it
- srcPathBase = ""
- }
- }
- destPath = filepath.Join(destPath, srcPathBase)
- }
- if err = copyWithTar(srcPath, destPath); err != nil {
- return errors.Wrapf(err, "error copying %q to %q", srcPath, dest)
- }
- return nil
- }
-
- if extract {
- // We're extracting an archive into the destination directory.
- logrus.Debugf("extracting contents of %q into %q", srcPath, destPath)
- if err = untarPath(srcPath, destPath); err != nil {
- return errors.Wrapf(err, "error extracting %q into %q", srcPath, destPath)
- }
- return nil
- }
-
- destfi, err := os.Stat(destPath)
- if err != nil {
- if !os.IsNotExist(err) || strings.HasSuffix(dest, string(os.PathSeparator)) {
- return err
- }
- }
- if destfi != nil && destfi.IsDir() {
- destPath = filepath.Join(destPath, filepath.Base(srcPath))
- }
-
- // Copy the file, preserving attributes.
- logrus.Debugf("copying %q to %q", srcPath, destPath)
- if err = copyFileWithTar(srcPath, destPath); err != nil {
- return errors.Wrapf(err, "error copying %q to %q", srcPath, destPath)
- }
- return nil
-}
-
-func convertIDMap(idMaps []idtools.IDMap) (convertedIDMap []specs.LinuxIDMapping) {
- for _, idmap := range idMaps {
- tempIDMap := specs.LinuxIDMapping{
- ContainerID: uint32(idmap.ContainerID),
- HostID: uint32(idmap.HostID),
- Size: uint32(idmap.Size),
- }
- convertedIDMap = append(convertedIDMap, tempIDMap)
- }
- return convertedIDMap
-}
-
-func streamFileToStdout(srcPath string, srcfi os.FileInfo) error {
- if srcfi.IsDir() {
- tw := tar.NewWriter(os.Stdout)
- err := filepath.Walk(srcPath, func(path string, info os.FileInfo, err error) error {
- if err != nil || !info.Mode().IsRegular() || path == srcPath {
- return err
- }
- hdr, err := tar.FileInfoHeader(info, "")
- if err != nil {
- return err
- }
-
- if err = tw.WriteHeader(hdr); err != nil {
- return err
- }
- fh, err := os.Open(path)
- if err != nil {
- return err
- }
- defer fh.Close()
-
- _, err = io.Copy(tw, fh)
- return err
- })
- if err != nil {
- return errors.Wrapf(err, "error streaming directory %s to Stdout", srcPath)
- }
- return nil
- }
-
- file, err := os.Open(srcPath)
- if err != nil {
- return err
- }
- defer file.Close()
- if !archive.IsArchivePath(srcPath) {
- tw := tar.NewWriter(os.Stdout)
- hdr, err := tar.FileInfoHeader(srcfi, "")
- if err != nil {
- return err
- }
- err = tw.WriteHeader(hdr)
- if err != nil {
- return err
- }
- _, err = io.Copy(tw, file)
- if err != nil {
- return errors.Wrapf(err, "error streaming archive %s to Stdout", srcPath)
- }
- return nil
- }
-
- _, err = io.Copy(os.Stdout, file)
- if err != nil {
- return errors.Wrapf(err, "error streaming file to Stdout")
- }
- return nil
-}
-
-func isVolumeDestName(path string, ctr *libpod.Container) (bool, string, string) {
- separator := string(os.PathSeparator)
- if filepath.IsAbs(path) {
- path = strings.TrimPrefix(path, separator)
- }
- if path == "" {
- return false, "", ""
- }
- for _, vol := range ctr.Config().NamedVolumes {
- volNamePath := strings.TrimPrefix(vol.Dest, separator)
- if matchVolumePath(path, volNamePath) {
- return true, vol.Dest, vol.Name
- }
- }
- return false, "", ""
-}
-
-// if SRCPATH or DESTPATH is from volume mount's destination -v or --mount type=volume, generates the path with volume mount point
-func pathWithVolumeMount(runtime *libpod.Runtime, volDestName, volName, path string) (string, error) {
- destVolume, err := runtime.GetVolume(volName)
- if err != nil {
- return "", errors.Wrapf(err, "error getting volume destination %s", volName)
- }
- if !filepath.IsAbs(path) {
- path = filepath.Join(string(os.PathSeparator), path)
- }
- path, err = securejoin.SecureJoin(destVolume.MountPoint(), strings.TrimPrefix(path, volDestName))
- return path, err
-}
-
-func isBindMountDestName(path string, ctr *libpod.Container) (bool, specs.Mount) {
- separator := string(os.PathSeparator)
- if filepath.IsAbs(path) {
- path = strings.TrimPrefix(path, string(os.PathSeparator))
- }
- if path == "" {
- return false, specs.Mount{}
- }
- for _, m := range ctr.Config().Spec.Mounts {
- if m.Type != "bind" {
- continue
- }
- mDest := strings.TrimPrefix(m.Destination, separator)
- if matchVolumePath(path, mDest) {
- return true, m
- }
- }
- return false, specs.Mount{}
-}
-
-func matchVolumePath(path, target string) bool {
- pathStr := filepath.Clean(path)
- target = filepath.Clean(target)
- for len(pathStr) > len(target) && strings.Contains(pathStr, string(os.PathSeparator)) {
- pathStr = pathStr[:strings.LastIndex(pathStr, string(os.PathSeparator))]
- }
- return pathStr == target
-}
-
-func pathWithBindMountSource(m specs.Mount, path string) (string, error) {
- if !filepath.IsAbs(path) {
- path = filepath.Join(string(os.PathSeparator), path)
- }
- return securejoin.SecureJoin(m.Source, strings.TrimPrefix(path, m.Destination))
-}
diff --git a/pkg/domain/infra/tunnel/containers.go b/pkg/domain/infra/tunnel/containers.go
index 63677719b..3584668c7 100644
--- a/pkg/domain/infra/tunnel/containers.go
+++ b/pkg/domain/infra/tunnel/containers.go
@@ -731,8 +731,8 @@ func (ic *ContainerEngine) ContainerPort(ctx context.Context, nameOrID string, o
return reports, nil
}
-func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string, options entities.ContainerCpOptions) (*entities.ContainerCpReport, error) {
- return nil, errors.New("not implemented")
+func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string, options entities.ContainerCpOptions) error {
+ return errors.New("not implemented")
}
// Shutdown Libpod engine
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-30 14:35:40 +0000