619 lines
22 KiB
Go
619 lines
22 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"strings"
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"testing"
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"gotest.tools/v3/assert"
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is "gotest.tools/v3/assert/cmp"
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"gotest.tools/v3/icmd"
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)
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const (
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cpTestPathParent = "/some"
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cpTestPath = "/some/path"
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cpTestName = "test"
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cpFullPath = "/some/path/test"
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cpContainerContents = "holla, i am the container"
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cpHostContents = "hello, i am the host"
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)
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type DockerCLICpSuite struct {
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ds *DockerSuite
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}
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func (s *DockerCLICpSuite) TearDownTest(c *testing.T) {
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s.ds.TearDownTest(c)
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}
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func (s *DockerCLICpSuite) OnTimeout(c *testing.T) {
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s.ds.OnTimeout(c)
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}
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// Ensure that an all-local path case returns an error.
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func (s *DockerCLICpSuite) TestCpLocalOnly(c *testing.T) {
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err := runDockerCp(c, "foo", "bar")
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assert.ErrorContains(c, err, "must specify at least one container source")
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}
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// Test for #5656
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// Check that garbage paths don't escape the container's rootfs
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func (s *DockerCLICpSuite) TestCpGarbagePath(c *testing.T) {
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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assert.NilError(c, os.MkdirAll(cpTestPath, os.ModeDir))
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hostFile, err := os.Create(cpFullPath)
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assert.NilError(c, err)
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defer hostFile.Close()
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defer os.RemoveAll(cpTestPathParent)
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fmt.Fprintf(hostFile, "%s", cpHostContents)
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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tmpname := filepath.Join(tmpdir, cpTestName)
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defer os.RemoveAll(tmpdir)
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path := path.Join("../../../../../../../../../../../../", cpFullPath)
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dockerCmd(c, "cp", containerID+":"+path, tmpdir)
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file, _ := os.Open(tmpname)
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defer file.Close()
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test, err := io.ReadAll(file)
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assert.NilError(c, err)
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assert.Assert(c, string(test) != cpHostContents, "output matched host file -- garbage path can escape container rootfs")
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assert.Assert(c, string(test) == cpContainerContents, "output doesn't match the input for garbage path")
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}
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// Check that relative paths are relative to the container's rootfs
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func (s *DockerCLICpSuite) TestCpRelativePath(c *testing.T) {
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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assert.NilError(c, os.MkdirAll(cpTestPath, os.ModeDir))
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hostFile, err := os.Create(cpFullPath)
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assert.NilError(c, err)
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defer hostFile.Close()
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defer os.RemoveAll(cpTestPathParent)
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fmt.Fprintf(hostFile, "%s", cpHostContents)
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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tmpname := filepath.Join(tmpdir, cpTestName)
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defer os.RemoveAll(tmpdir)
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var relPath string
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if path.IsAbs(cpFullPath) {
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// normally this is `filepath.Rel("/", cpFullPath)` but we cannot
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// get this unix-path manipulation on windows with filepath.
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relPath = cpFullPath[1:]
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}
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assert.Assert(c, path.IsAbs(cpFullPath), "path %s was assumed to be an absolute path", cpFullPath)
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dockerCmd(c, "cp", containerID+":"+relPath, tmpdir)
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file, _ := os.Open(tmpname)
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defer file.Close()
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test, err := io.ReadAll(file)
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assert.NilError(c, err)
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assert.Assert(c, string(test) != cpHostContents, "output matched host file -- relative path can escape container rootfs")
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assert.Assert(c, string(test) == cpContainerContents, "output doesn't match the input for relative path")
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}
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// Check that absolute paths are relative to the container's rootfs
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func (s *DockerCLICpSuite) TestCpAbsolutePath(c *testing.T) {
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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assert.NilError(c, os.MkdirAll(cpTestPath, os.ModeDir))
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hostFile, err := os.Create(cpFullPath)
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assert.NilError(c, err)
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defer hostFile.Close()
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defer os.RemoveAll(cpTestPathParent)
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fmt.Fprintf(hostFile, "%s", cpHostContents)
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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tmpname := filepath.Join(tmpdir, cpTestName)
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defer os.RemoveAll(tmpdir)
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path := cpFullPath
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dockerCmd(c, "cp", containerID+":"+path, tmpdir)
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file, _ := os.Open(tmpname)
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defer file.Close()
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test, err := io.ReadAll(file)
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assert.NilError(c, err)
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assert.Assert(c, string(test) != cpHostContents, "output matched host file -- absolute path can escape container rootfs")
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assert.Assert(c, string(test) == cpContainerContents, "output doesn't match the input for absolute path")
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}
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// Test for #5619
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// Check that absolute symlinks are still relative to the container's rootfs
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func (s *DockerCLICpSuite) TestCpAbsoluteSymlink(c *testing.T) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpFullPath+" container_path")
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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assert.NilError(c, os.MkdirAll(cpTestPath, os.ModeDir))
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hostFile, err := os.Create(cpFullPath)
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assert.NilError(c, err)
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defer hostFile.Close()
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defer os.RemoveAll(cpTestPathParent)
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fmt.Fprintf(hostFile, "%s", cpHostContents)
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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tmpname := filepath.Join(tmpdir, "container_path")
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defer os.RemoveAll(tmpdir)
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path := path.Join("/", "container_path")
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dockerCmd(c, "cp", containerID+":"+path, tmpdir)
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// We should have copied a symlink *NOT* the file itself!
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linkTarget, err := os.Readlink(tmpname)
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assert.NilError(c, err)
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assert.Equal(c, linkTarget, filepath.FromSlash(cpFullPath))
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}
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// Check that symlinks to a directory behave as expected when copying one from
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// a container.
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func (s *DockerCLICpSuite) TestCpFromSymlinkToDirectory(c *testing.T) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpTestPathParent+" /dir_link")
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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testDir, err := os.MkdirTemp("", "test-cp-from-symlink-to-dir-")
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assert.NilError(c, err)
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defer os.RemoveAll(testDir)
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// This copy command should copy the symlink, not the target, into the
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// temporary directory.
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dockerCmd(c, "cp", containerID+":"+"/dir_link", testDir)
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expectedPath := filepath.Join(testDir, "dir_link")
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linkTarget, err := os.Readlink(expectedPath)
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assert.NilError(c, err)
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assert.Equal(c, linkTarget, filepath.FromSlash(cpTestPathParent))
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os.Remove(expectedPath)
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// This copy command should resolve the symlink (note the trailing
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// separator), copying the target into the temporary directory.
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dockerCmd(c, "cp", containerID+":"+"/dir_link/", testDir)
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// It *should not* have copied the directory using the target's name, but
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// used the given name instead.
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unexpectedPath := filepath.Join(testDir, cpTestPathParent)
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stat, err := os.Lstat(unexpectedPath)
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if err == nil {
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out = fmt.Sprintf("target name was copied: %q - %q", stat.Mode(), stat.Name())
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}
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assert.ErrorContains(c, err, "", out)
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// It *should* have copied the directory using the asked name "dir_link".
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stat, err = os.Lstat(expectedPath)
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assert.NilError(c, err, "unable to stat resource at %q", expectedPath)
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assert.Assert(c, stat.IsDir(), "should have copied a directory but got %q instead", stat.Mode())
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}
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// Check that symlinks to a directory behave as expected when copying one to a
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// container.
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func (s *DockerCLICpSuite) TestCpToSymlinkToDirectory(c *testing.T) {
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testRequires(c, DaemonIsLinux)
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testRequires(c, testEnv.IsLocalDaemon) // Requires local volume mount bind.
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testVol, err := os.MkdirTemp("", "test-cp-to-symlink-to-dir-")
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assert.NilError(c, err)
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defer os.RemoveAll(testVol)
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// Create a test container with a local volume. We will test by copying
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// to the volume path in the container which we can then verify locally.
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out, _ := dockerCmd(c, "create", "-v", testVol+":/testVol", "busybox")
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containerID := strings.TrimSpace(out)
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// Create a temp directory to hold a test file nested in a directory.
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testDir, err := os.MkdirTemp("", "test-cp-to-symlink-to-dir-")
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assert.NilError(c, err)
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defer os.RemoveAll(testDir)
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// This file will be at "/testDir/some/path/test" and will be copied into
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// the test volume later.
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hostTestFilename := filepath.Join(testDir, cpFullPath)
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assert.NilError(c, os.MkdirAll(filepath.Dir(hostTestFilename), os.FileMode(0700)))
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assert.NilError(c, os.WriteFile(hostTestFilename, []byte(cpHostContents), os.FileMode(0600)))
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// Now create another temp directory to hold a symlink to the
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// "/testDir/some" directory.
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linkDir, err := os.MkdirTemp("", "test-cp-to-symlink-to-dir-")
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assert.NilError(c, err)
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defer os.RemoveAll(linkDir)
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// Then symlink "/linkDir/dir_link" to "/testdir/some".
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linkTarget := filepath.Join(testDir, cpTestPathParent)
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localLink := filepath.Join(linkDir, "dir_link")
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assert.NilError(c, os.Symlink(linkTarget, localLink))
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// Now copy that symlink into the test volume in the container.
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dockerCmd(c, "cp", localLink, containerID+":/testVol")
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// This copy command should have copied the symlink *not* the target.
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expectedPath := filepath.Join(testVol, "dir_link")
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actualLinkTarget, err := os.Readlink(expectedPath)
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assert.NilError(c, err, "unable to read symlink at %q", expectedPath)
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assert.Equal(c, actualLinkTarget, linkTarget)
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// Good, now remove that copied link for the next test.
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os.Remove(expectedPath)
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// This copy command should resolve the symlink (note the trailing
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// separator), copying the target into the test volume directory in the
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// container.
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dockerCmd(c, "cp", localLink+"/", containerID+":/testVol")
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// It *should not* have copied the directory using the target's name, but
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// used the given name instead.
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unexpectedPath := filepath.Join(testVol, cpTestPathParent)
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stat, err := os.Lstat(unexpectedPath)
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if err == nil {
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out = fmt.Sprintf("target name was copied: %q - %q", stat.Mode(), stat.Name())
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}
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assert.ErrorContains(c, err, "", out)
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// It *should* have copied the directory using the asked name "dir_link".
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stat, err = os.Lstat(expectedPath)
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assert.NilError(c, err, "unable to stat resource at %q", expectedPath)
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assert.Assert(c, stat.IsDir(), "should have copied a directory but got %q instead", stat.Mode())
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// And this directory should contain the file copied from the host at the
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// expected location: "/testVol/dir_link/path/test"
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expectedFilepath := filepath.Join(testVol, "dir_link/path/test")
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fileContents, err := os.ReadFile(expectedFilepath)
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assert.NilError(c, err)
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assert.Equal(c, string(fileContents), cpHostContents)
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}
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// Test for #5619
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// Check that symlinks which are part of the resource path are still relative to the container's rootfs
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func (s *DockerCLICpSuite) TestCpSymlinkComponent(c *testing.T) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpTestPath+" container_path")
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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assert.NilError(c, os.MkdirAll(cpTestPath, os.ModeDir))
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hostFile, err := os.Create(cpFullPath)
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assert.NilError(c, err)
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defer hostFile.Close()
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defer os.RemoveAll(cpTestPathParent)
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fmt.Fprintf(hostFile, "%s", cpHostContents)
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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tmpname := filepath.Join(tmpdir, cpTestName)
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defer os.RemoveAll(tmpdir)
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path := path.Join("/", "container_path", cpTestName)
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dockerCmd(c, "cp", containerID+":"+path, tmpdir)
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file, _ := os.Open(tmpname)
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defer file.Close()
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test, err := io.ReadAll(file)
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assert.NilError(c, err)
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assert.Assert(c, string(test) != cpHostContents, "output matched host file -- symlink path component can escape container rootfs")
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assert.Equal(c, string(test), cpContainerContents, "output doesn't match the input for symlink path component")
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}
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// Check that cp with unprivileged user doesn't return any error
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func (s *DockerCLICpSuite) TestCpUnprivilegedUser(c *testing.T) {
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testRequires(c, DaemonIsLinux, testEnv.IsLocalDaemon)
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testRequires(c, UnixCli) // uses chmod/su: not available on windows
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "touch "+cpTestName)
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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tmpdir, err := os.MkdirTemp("", "docker-integration")
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assert.NilError(c, err)
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defer os.RemoveAll(tmpdir)
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err = os.Chmod(tmpdir, 0777)
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assert.NilError(c, err)
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result := icmd.RunCommand("su", "unprivilegeduser", "-c",
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fmt.Sprintf("%s cp %s:%s %s", dockerBinary, containerID, cpTestName, tmpdir))
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result.Assert(c, icmd.Expected{})
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}
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func (s *DockerCLICpSuite) TestCpSpecialFiles(c *testing.T) {
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testRequires(c, DaemonIsLinux)
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testRequires(c, testEnv.IsLocalDaemon)
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outDir, err := os.MkdirTemp("", "cp-test-special-files")
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assert.NilError(c, err)
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defer os.RemoveAll(outDir)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "touch /foo")
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containerID := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "wait", containerID)
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assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
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// Copy actual /etc/resolv.conf
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dockerCmd(c, "cp", containerID+":/etc/resolv.conf", outDir)
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expected := readContainerFile(c, containerID, "resolv.conf")
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actual, err := os.ReadFile(outDir + "/resolv.conf")
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assert.NilError(c, err)
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assert.Assert(c, bytes.Equal(actual, expected), "Expected copied file to be duplicate of the container resolvconf")
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// Copy actual /etc/hosts
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dockerCmd(c, "cp", containerID+":/etc/hosts", outDir)
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expected = readContainerFile(c, containerID, "hosts")
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actual, err = os.ReadFile(outDir + "/hosts")
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assert.NilError(c, err)
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assert.Assert(c, bytes.Equal(actual, expected), "Expected copied file to be duplicate of the container hosts")
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|
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// Copy actual /etc/resolv.conf
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dockerCmd(c, "cp", containerID+":/etc/hostname", outDir)
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expected = readContainerFile(c, containerID, "hostname")
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actual, err = os.ReadFile(outDir + "/hostname")
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assert.NilError(c, err)
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assert.Assert(c, bytes.Equal(actual, expected), "Expected copied file to be duplicate of the container hostname")
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}
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|
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func (s *DockerCLICpSuite) TestCpVolumePath(c *testing.T) {
|
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// stat /tmp/cp-test-volumepath851508420/test gets permission denied for the user
|
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testRequires(c, NotUserNamespace)
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testRequires(c, DaemonIsLinux)
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testRequires(c, testEnv.IsLocalDaemon)
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tmpDir, err := os.MkdirTemp("", "cp-test-volumepath")
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assert.NilError(c, err)
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defer os.RemoveAll(tmpDir)
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outDir, err := os.MkdirTemp("", "cp-test-volumepath-out")
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assert.NilError(c, err)
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defer os.RemoveAll(outDir)
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_, err = os.Create(tmpDir + "/test")
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assert.NilError(c, err)
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|
|
out, _ := dockerCmd(c, "run", "-d", "-v", "/foo", "-v", tmpDir+"/test:/test", "-v", tmpDir+":/baz", "busybox", "/bin/sh", "-c", "touch /foo/bar")
|
|
|
|
containerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
// Copy actual volume path
|
|
dockerCmd(c, "cp", containerID+":/foo", outDir)
|
|
|
|
stat, err := os.Stat(outDir + "/foo")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, stat.IsDir(), "Expected copied content to be dir")
|
|
|
|
stat, err = os.Stat(outDir + "/foo/bar")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, !stat.IsDir(), "Expected file `bar` to be a file")
|
|
|
|
// Copy file nested in volume
|
|
dockerCmd(c, "cp", containerID+":/foo/bar", outDir)
|
|
|
|
stat, err = os.Stat(outDir + "/bar")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, !stat.IsDir(), "Expected file `bar` to be a file")
|
|
|
|
// Copy Bind-mounted dir
|
|
dockerCmd(c, "cp", containerID+":/baz", outDir)
|
|
stat, err = os.Stat(outDir + "/baz")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, stat.IsDir(), "Expected `baz` to be a dir")
|
|
|
|
// Copy file nested in bind-mounted dir
|
|
dockerCmd(c, "cp", containerID+":/baz/test", outDir)
|
|
fb, err := os.ReadFile(outDir + "/baz/test")
|
|
assert.NilError(c, err)
|
|
fb2, err := os.ReadFile(tmpDir + "/test")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, bytes.Equal(fb, fb2), "Expected copied file to be duplicate of bind-mounted file")
|
|
|
|
// Copy bind-mounted file
|
|
dockerCmd(c, "cp", containerID+":/test", outDir)
|
|
fb, err = os.ReadFile(outDir + "/test")
|
|
assert.NilError(c, err)
|
|
fb2, err = os.ReadFile(tmpDir + "/test")
|
|
assert.NilError(c, err)
|
|
assert.Assert(c, bytes.Equal(fb, fb2), "Expected copied file to be duplicate of bind-mounted file")
|
|
}
|
|
|
|
func (s *DockerCLICpSuite) TestCpToDot(c *testing.T) {
|
|
out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "echo lololol > /test")
|
|
|
|
containerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
tmpdir, err := os.MkdirTemp("", "docker-integration")
|
|
assert.NilError(c, err)
|
|
defer os.RemoveAll(tmpdir)
|
|
cwd, err := os.Getwd()
|
|
assert.NilError(c, err)
|
|
defer os.Chdir(cwd)
|
|
err = os.Chdir(tmpdir)
|
|
assert.NilError(c, err)
|
|
|
|
dockerCmd(c, "cp", containerID+":/test", ".")
|
|
content, err := os.ReadFile("./test")
|
|
assert.NilError(c, err)
|
|
assert.Equal(c, string(content), "lololol\n")
|
|
}
|
|
|
|
func (s *DockerCLICpSuite) TestCpToStdout(c *testing.T) {
|
|
out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "echo lololol > /test")
|
|
|
|
containerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
out, err := RunCommandPipelineWithOutput(
|
|
exec.Command(dockerBinary, "cp", containerID+":/test", "-"),
|
|
exec.Command("tar", "-vtf", "-"))
|
|
|
|
assert.NilError(c, err)
|
|
assert.Check(c, is.Contains(out, "test"))
|
|
assert.Check(c, is.Contains(out, "-rw"))
|
|
}
|
|
|
|
func (s *DockerCLICpSuite) TestCpNameHasColon(c *testing.T) {
|
|
testRequires(c, testEnv.IsLocalDaemon, DaemonIsLinux)
|
|
|
|
out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "echo lololol > /te:s:t")
|
|
|
|
containerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
tmpdir, err := os.MkdirTemp("", "docker-integration")
|
|
assert.NilError(c, err)
|
|
defer os.RemoveAll(tmpdir)
|
|
dockerCmd(c, "cp", containerID+":/te:s:t", tmpdir)
|
|
content, err := os.ReadFile(tmpdir + "/te:s:t")
|
|
assert.NilError(c, err)
|
|
assert.Equal(c, string(content), "lololol\n")
|
|
}
|
|
|
|
func (s *DockerCLICpSuite) TestCopyAndRestart(c *testing.T) {
|
|
testRequires(c, DaemonIsLinux)
|
|
expectedMsg := "hello"
|
|
out, _ := dockerCmd(c, "run", "-d", "busybox", "echo", expectedMsg)
|
|
containerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
tmpDir, err := os.MkdirTemp("", "test-docker-restart-after-copy-")
|
|
assert.NilError(c, err)
|
|
defer os.RemoveAll(tmpDir)
|
|
|
|
dockerCmd(c, "cp", fmt.Sprintf("%s:/etc/group", containerID), tmpDir)
|
|
|
|
out, _ = dockerCmd(c, "start", "-a", containerID)
|
|
assert.Equal(c, strings.TrimSpace(out), expectedMsg)
|
|
}
|
|
|
|
func (s *DockerCLICpSuite) TestCopyCreatedContainer(c *testing.T) {
|
|
testRequires(c, DaemonIsLinux)
|
|
dockerCmd(c, "create", "--name", "test_cp", "-v", "/test", "busybox")
|
|
|
|
tmpDir, err := os.MkdirTemp("", "test")
|
|
assert.NilError(c, err)
|
|
defer os.RemoveAll(tmpDir)
|
|
dockerCmd(c, "cp", "test_cp:/bin/sh", tmpDir)
|
|
}
|
|
|
|
// test copy with option `-L`: following symbol link
|
|
// Check that symlinks to a file behave as expected when copying one from
|
|
// a container to host following symbol link
|
|
func (s *DockerCLICpSuite) TestCpSymlinkFromConToHostFollowSymlink(c *testing.T) {
|
|
testRequires(c, DaemonIsLinux)
|
|
out, exitCode := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpFullPath+" /dir_link")
|
|
assert.Equal(c, exitCode, 0, "failed to set up container: %s", out)
|
|
|
|
cleanedContainerID := strings.TrimSpace(out)
|
|
|
|
out, _ = dockerCmd(c, "wait", cleanedContainerID)
|
|
assert.Equal(c, strings.TrimSpace(out), "0", "failed to set up container")
|
|
|
|
testDir, err := os.MkdirTemp("", "test-cp-symlink-container-to-host-follow-symlink")
|
|
assert.NilError(c, err)
|
|
defer os.RemoveAll(testDir)
|
|
|
|
// This copy command should copy the symlink, not the target, into the
|
|
// temporary directory.
|
|
dockerCmd(c, "cp", "-L", cleanedContainerID+":"+"/dir_link", testDir)
|
|
|
|
expectedPath := filepath.Join(testDir, "dir_link")
|
|
|
|
expected := []byte(cpContainerContents)
|
|
actual, err := os.ReadFile(expectedPath)
|
|
assert.NilError(c, err)
|
|
os.Remove(expectedPath)
|
|
assert.Assert(c, bytes.Equal(actual, expected), "Expected copied file to be duplicate of the container symbol link target")
|
|
|
|
// now test copy symbol link to a non-existing file in host
|
|
expectedPath = filepath.Join(testDir, "somefile_host")
|
|
// expectedPath shouldn't exist, if exists, remove it
|
|
if _, err := os.Lstat(expectedPath); err == nil {
|
|
os.Remove(expectedPath)
|
|
}
|
|
|
|
dockerCmd(c, "cp", "-L", cleanedContainerID+":"+"/dir_link", expectedPath)
|
|
|
|
actual, err = os.ReadFile(expectedPath)
|
|
assert.NilError(c, err)
|
|
defer os.Remove(expectedPath)
|
|
assert.Assert(c, bytes.Equal(actual, expected), "Expected copied file to be duplicate of the container symbol link target")
|
|
}
|