summaryrefslogtreecommitdiff
path: root/libpod
diff options
context:
space:
mode:
Diffstat (limited to 'libpod')
-rw-r--r--libpod/container_copy_linux.go70
-rw-r--r--libpod/container_stat_linux.go42
2 files changed, 67 insertions, 45 deletions
diff --git a/libpod/container_copy_linux.go b/libpod/container_copy_linux.go
index 66ccd2f1f..5c275c641 100644
--- a/libpod/container_copy_linux.go
+++ b/libpod/container_copy_linux.go
@@ -14,7 +14,7 @@ import (
"github.com/containers/buildah/pkg/chrootuser"
"github.com/containers/buildah/util"
"github.com/containers/podman/v3/libpod/define"
- "github.com/containers/storage"
+ "github.com/containers/podman/v3/pkg/rootless"
"github.com/containers/storage/pkg/idtools"
"github.com/docker/docker/pkg/archive"
"github.com/opencontainers/runtime-spec/specs-go"
@@ -62,15 +62,16 @@ func (c *Container) copyFromArchive(ctx context.Context, path string, reader io.
}
}
- decompressed, err := archive.DecompressStream(reader)
+ // Make sure we chown the files to the container's main user and group ID.
+ user, err := getContainerUser(c, mountPoint)
if err != nil {
unmount()
return nil, err
}
+ idPair := idtools.IDPair{UID: int(user.UID), GID: int(user.GID)}
- idMappings, idPair, err := getIDMappingsAndPair(c, mountPoint)
+ decompressed, err := archive.DecompressStream(reader)
if err != nil {
- decompressed.Close()
unmount()
return nil, err
}
@@ -81,10 +82,10 @@ func (c *Container) copyFromArchive(ctx context.Context, path string, reader io.
defer unmount()
defer decompressed.Close()
putOptions := buildahCopiah.PutOptions{
- UIDMap: idMappings.UIDMap,
- GIDMap: idMappings.GIDMap,
- ChownDirs: idPair,
- ChownFiles: idPair,
+ UIDMap: c.config.IDMappings.UIDMap,
+ GIDMap: c.config.IDMappings.GIDMap,
+ ChownDirs: &idPair,
+ ChownFiles: &idPair,
}
return c.joinMountAndExec(ctx,
@@ -121,11 +122,25 @@ func (c *Container) copyToArchive(ctx context.Context, path string, writer io.Wr
return nil, err
}
- idMappings, idPair, err := getIDMappingsAndPair(c, mountPoint)
+ // We optimistically chown to the host user. In case of a hypothetical
+ // container-to-container copy, the reading side will chown back to the
+ // container user.
+ user, err := getContainerUser(c, mountPoint)
+ if err != nil {
+ unmount()
+ return nil, err
+ }
+ hostUID, hostGID, err := util.GetHostIDs(
+ idtoolsToRuntimeSpec(c.config.IDMappings.UIDMap),
+ idtoolsToRuntimeSpec(c.config.IDMappings.GIDMap),
+ user.UID,
+ user.GID,
+ )
if err != nil {
unmount()
return nil, err
}
+ idPair := idtools.IDPair{UID: int(hostUID), GID: int(hostGID)}
logrus.Debugf("Container copy *from* %q (resolved: %q) on container %q (ID: %s)", path, resolvedPath, c.Name(), c.ID())
@@ -134,11 +149,16 @@ func (c *Container) copyToArchive(ctx context.Context, path string, writer io.Wr
getOptions := buildahCopiah.GetOptions{
// Unless the specified points to ".", we want to copy the base directory.
KeepDirectoryNames: statInfo.IsDir && filepath.Base(path) != ".",
- UIDMap: idMappings.UIDMap,
- GIDMap: idMappings.GIDMap,
- ChownDirs: idPair,
- ChownFiles: idPair,
+ UIDMap: c.config.IDMappings.UIDMap,
+ GIDMap: c.config.IDMappings.GIDMap,
+ ChownDirs: &idPair,
+ ChownFiles: &idPair,
Excludes: []string{"dev", "proc", "sys"},
+ // Ignore EPERMs when copying from rootless containers
+ // since we cannot read TTY devices. Those are owned
+ // by the host's root and hence "nobody" inside the
+ // container's user namespace.
+ IgnoreUnreadable: rootless.IsRootless() && c.state.State == define.ContainerStateRunning,
}
return c.joinMountAndExec(ctx,
func() error {
@@ -148,29 +168,7 @@ func (c *Container) copyToArchive(ctx context.Context, path string, writer io.Wr
}, nil
}
-// getIDMappingsAndPair returns the ID mappings for the container and the host
-// ID pair.
-func getIDMappingsAndPair(container *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.
+// getContainerUser returns the specs.User and ID mappings of the container.
func getContainerUser(container *Container, mountPoint string) (specs.User, error) {
userspec := container.Config().User
diff --git a/libpod/container_stat_linux.go b/libpod/container_stat_linux.go
index 307b75c14..0b4d9e2df 100644
--- a/libpod/container_stat_linux.go
+++ b/libpod/container_stat_linux.go
@@ -64,6 +64,13 @@ func (c *Container) stat(ctx context.Context, containerMountPoint string, contai
containerPath = "/."
}
+ // Wildcards are not allowed.
+ // TODO: it's now technically possible wildcards.
+ // We may consider enabling support in the future.
+ if strings.Contains(containerPath, "*") {
+ return nil, "", "", copy.ErrENOENT
+ }
+
if c.state.State == define.ContainerStateRunning {
// If the container is running, we need to join it's mount namespace
// and stat there.
@@ -88,7 +95,8 @@ func (c *Container) stat(ctx context.Context, containerMountPoint string, contai
}
if statInfo.IsSymlink {
- // Evaluated symlinks are always relative to the container's mount point.
+ // Symlinks are already evaluated and always relative to the
+ // container's mount point.
absContainerPath = statInfo.ImmediateTarget
} else if strings.HasPrefix(resolvedPath, containerMountPoint) {
// If the path is on the container's mount point, strip it off.
@@ -143,15 +151,31 @@ func secureStat(root string, path string) (*copier.StatForItem, error) {
if len(globStats) != 1 {
return nil, errors.Errorf("internal 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 nil, copy.ErrENOENT
+ if len(globStats) != 1 {
+ return nil, errors.Errorf("internal error: secureStat: expected 1 result but got %d", len(globStats[0].Results))
}
- var statErr error
- if stat.Error != "" {
- statErr = errors.New(stat.Error)
+ // NOTE: the key in the map differ from `glob` when hitting symlink.
+ // Hence, we just take the first (and only) key/value pair.
+ for _, stat := range globStats[0].Results {
+ var statErr error
+ if stat.Error != "" {
+ statErr = errors.New(stat.Error)
+ }
+ // If necessary evaluate the symlink
+ if stat.IsSymlink {
+ target, err := copier.Eval(root, path, copier.EvalOptions{})
+ if err != nil {
+ return nil, errors.Wrap(err, "error evaluating symlink in container")
+ }
+ // Need to make sure the symlink is relative to the root!
+ target = strings.TrimPrefix(target, root)
+ target = filepath.Join("/", target)
+ stat.ImmediateTarget = target
+ }
+ return stat, statErr
}
- return stat, statErr
+
+ // Nothing found!
+ return nil, copy.ErrENOENT
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-10-01 18:43:42 +0000