e8dc902781
Integration tests will now configure clients to propagate traces as well as create spans for all tests. Some extra changes were needed (or desired for trace propagation) in the test helpers to pass through tracing spans via context. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
620 lines
22 KiB
Go
620 lines
22 KiB
Go
package main
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import (
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"bytes"
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"context"
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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(ctx context.Context, c *testing.T) {
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s.ds.TearDownTest(ctx, 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(0o700)))
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assert.NilError(c, os.WriteFile(hostTestFilename, []byte(cpHostContents), os.FileMode(0o600)))
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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, 0o777)
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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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// 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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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)
|
|
_, err = os.Create(tmpDir + "/test")
|
|
assert.NilError(c, err)
|
|
|
|
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")
|
|
}
|