mirror of
https://github.com/containers/podman.git
synced 2025-06-24 19:42:56 +08:00
rewrite podman-cp
* Add a new `pkg/copy` to centralize all container-copy related code. * The new code is based on Buildah's `copier` package. * The compat `/archive` endpoints use the new `copy` package. * Update docs and an several new tests. * Includes many fixes, most notably, the look-up of volumes and mounts. Breaking changes: * Podman is now expecting that container-destination paths exist. Before, Podman created the paths if needed. Docker does not do that and I believe Podman should not either as it's a recipe for masking errors. These errors may be user induced (e.g., a path typo), or internal typos (e.g., when the destination may be a mistakenly unmounted volume). Let's keep the magic low for such a security sensitive feature. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
This commit is contained in:
Valentin Rothberg
@ -4,14 +4,18 @@ import (
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"io/ioutil"
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"os"
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"os/exec"
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"os/user"
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"path/filepath"
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"strings"
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. "github.com/containers/podman/v2/test/utils"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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// NOTE: Only smoke tests. The system tests (i.e., "./test/system/*") take
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// care of function and regression tests. Please consider adding system tests
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// rather than e2e tests. System tests are used in RHEL gating.
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var _ = Describe("Podman cp", func() {
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var (
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tempdir string
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@ -37,240 +41,108 @@ var _ = Describe("Podman cp", func() {
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})
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// Copy a file to the container, then back to the host and make sure
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// that the contents match.
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It("podman cp file", func() {
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srcPath := filepath.Join(podmanTest.RunRoot, "cp_test.txt")
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dstPath := filepath.Join(podmanTest.RunRoot, "cp_from_container")
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fromHostToContainer := []byte("copy from host to container")
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srcFile, err := ioutil.TempFile("", "")
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Expect(err).To(BeNil())
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defer srcFile.Close()
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defer os.Remove(srcFile.Name())
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session := podmanTest.Podman([]string{"create", ALPINE, "cat", "foo"})
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originalContent := []byte("podman cp file test")
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err = ioutil.WriteFile(srcFile.Name(), originalContent, 0644)
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Expect(err).To(BeNil())
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// Create a container. NOTE that container mustn't be running for copying.
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session := podmanTest.Podman([]string{"create", ALPINE})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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name := session.OutputToString()
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err := ioutil.WriteFile(srcPath, fromHostToContainer, 0644)
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Expect(err).To(BeNil())
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// Copy TO the container.
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session = podmanTest.Podman([]string{"cp", srcPath, name + ":foo/"})
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// Cannot copy to a non-existent path (note the trailing "/").
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session = podmanTest.Podman([]string{"cp", srcFile.Name(), name + ":foo/"})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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session = podmanTest.Podman([]string{"cp", srcPath, name + ":foo"})
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// The file will now be created (and written to).
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session = podmanTest.Podman([]string{"cp", srcFile.Name(), name + ":foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", name + ":foo", dstPath})
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// Copy FROM the container.
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destFile, err := ioutil.TempFile("", "")
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Expect(err).To(BeNil())
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defer destFile.Close()
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defer os.Remove(destFile.Name())
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session = podmanTest.Podman([]string{"cp", name + ":foo", destFile.Name()})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"start", name})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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// Now make sure the content matches.
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roundtripContent, err := ioutil.ReadFile(destFile.Name())
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Expect(err).To(BeNil())
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Expect(roundtripContent).To(Equal(originalContent))
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})
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It("podman cp file to dir", func() {
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name := "testctr"
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setup := podmanTest.RunTopContainer(name)
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setup.WaitWithDefaultTimeout()
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Expect(setup.ExitCode()).To(Equal(0))
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srcPath := "/tmp/cp_test.txt"
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fromHostToContainer := []byte("copy from host to container directory")
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err := ioutil.WriteFile(srcPath, fromHostToContainer, 0644)
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Expect(err).To(BeNil())
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session := podmanTest.Podman([]string{"exec", name, "mkdir", "foodir"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", srcPath, name + ":foodir/"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"exec", name, "ls", "foodir/cp_test.txt"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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os.Remove("/tmp/cp_test.txt")
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})
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It("podman cp dir to dir", func() {
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testDirPath := filepath.Join(podmanTest.RunRoot, "TestDir1")
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session := podmanTest.Podman([]string{"create", ALPINE, "ls", "/foodir"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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name := session.OutputToString()
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err := os.Mkdir(testDirPath, 0755)
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Expect(err).To(BeNil())
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defer os.RemoveAll(testDirPath)
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session = podmanTest.Podman([]string{"cp", testDirPath, name + ":/foodir"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", testDirPath, name + ":/foodir"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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testctr := "testctr"
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setup := podmanTest.RunTopContainer(testctr)
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setup.WaitWithDefaultTimeout()
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Expect(setup.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"exec", testctr, "mkdir", "foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", testDirPath + "/.", testctr + ":/foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"exec", testctr, "ls", "foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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Expect(len(session.OutputToString())).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", testctr + ":/foo/.", testDirPath})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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cmd := exec.Command("ls", testDirPath)
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res, err := cmd.Output()
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Expect(err).To(BeNil())
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Expect(len(res)).To(Equal(0))
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})
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It("podman cp stdin/stdout", func() {
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SkipIfRemote("FIXME: podman-remote cp not implemented yet")
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session := podmanTest.Podman([]string{"create", ALPINE, "ls", "foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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name := session.OutputToString()
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testDirPath := filepath.Join(podmanTest.RunRoot, "TestDir2")
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err := os.Mkdir(testDirPath, 0755)
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Expect(err).To(BeNil())
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defer os.RemoveAll(testDirPath)
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cmd := exec.Command("tar", "-zcvf", "file.tar.gz", testDirPath)
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_, err = cmd.Output()
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Expect(err).To(BeNil())
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data, err := ioutil.ReadFile("foo.tar.gz")
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reader := strings.NewReader(string(data))
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cmd.Stdin = reader
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session = podmanTest.Podman([]string{"cp", "-", name + ":/foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", "file.tar.gz", name + ":/foo.tar.gz"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", name + ":/foo.tar.gz", "-"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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os.Remove("file.tar.gz")
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})
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It("podman cp tar", func() {
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testctr := "testctr"
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setup := podmanTest.RunTopContainer(testctr)
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setup.WaitWithDefaultTimeout()
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Expect(setup.ExitCode()).To(Equal(0))
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session := podmanTest.Podman([]string{"exec", testctr, "mkdir", "foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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path, err := os.Getwd()
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Expect(err).To(BeNil())
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testDirPath := filepath.Join(path, "TestDir3")
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err = os.Mkdir(testDirPath, 0777)
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Expect(err).To(BeNil())
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defer os.RemoveAll(testDirPath)
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cmd := exec.Command("tar", "-cvf", "file.tar", testDirPath)
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_, err = cmd.Output()
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Expect(err).To(BeNil())
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session = podmanTest.Podman([]string{"cp", "file.tar", "testctr:/foo/"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"exec", testctr, "ls", "-l", "foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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Expect(session.OutputToString()).To(ContainSubstring("file.tar"))
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os.Remove("file.tar")
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})
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It("podman cp tar --extract", func() {
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testctr := "testctr"
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setup := podmanTest.RunTopContainer(testctr)
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setup.WaitWithDefaultTimeout()
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Expect(setup.ExitCode()).To(Equal(0))
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session := podmanTest.Podman([]string{"exec", testctr, "mkdir", "/foo"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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path, err := os.Getwd()
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Expect(err).To(BeNil())
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testDirPath := filepath.Join(path, "TestDir4")
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err = os.Mkdir(testDirPath, 0777)
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Expect(err).To(BeNil())
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defer os.RemoveAll(testDirPath)
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f, err := os.Create(filepath.Join(testDirPath, "a.txt"))
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Expect(err).To(BeNil())
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_, err = f.Write([]byte("Hello World!!!\n"))
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f.Close()
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cmd := exec.Command("tar", "-cvf", "file.tar", "TestDir4")
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exec.Command("tar", "-cvf", "/home/mvasek/file.tar", testDirPath)
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_, err = cmd.Output()
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Expect(err).To(BeNil())
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defer os.Remove("file.tar")
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session = podmanTest.Podman([]string{"cp", "--extract", "file.tar", "testctr:/foo/"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"exec", testctr, "cat", "/foo/TestDir4/a.txt"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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Expect(session.OutputToString()).To(ContainSubstring("Hello World!!!"))
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})
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// Create a symlink in the container, use it as a copy destination and
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// make sure that the link and the resolved path are accessible and
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// give the right content.
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It("podman cp symlink", func() {
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srcFile, err := ioutil.TempFile("", "")
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Expect(err).To(BeNil())
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defer srcFile.Close()
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defer os.Remove(srcFile.Name())
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originalContent := []byte("podman cp symlink test")
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err = ioutil.WriteFile(srcFile.Name(), originalContent, 0644)
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Expect(err).To(BeNil())
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session := podmanTest.Podman([]string{"run", "-d", ALPINE, "top"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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name := session.OutputToString()
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srcPath := filepath.Join(podmanTest.RunRoot, "cp_test.txt")
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fromHostToContainer := []byte("copy from host to container")
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err := ioutil.WriteFile(srcPath, fromHostToContainer, 0644)
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Expect(err).To(BeNil())
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session = podmanTest.Podman([]string{"exec", name, "ln", "-s", "/tmp", "/test"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", "--pause=false", srcPath, name + ":/test"})
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session = podmanTest.Podman([]string{"cp", "--pause=false", srcFile.Name(), name + ":/test"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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_, err = os.Stat("/tmp/cp_test.txt")
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Expect(err).To(Not(BeNil()))
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session = podmanTest.Podman([]string{"exec", name, "ln", "-s", "/tmp/nonesuch", "/test1"})
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session = podmanTest.Podman([]string{"exec", name, "cat", "/tmp/" + filepath.Base(srcFile.Name())})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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Expect(session.OutputToString()).To(ContainSubstring(string(originalContent)))
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session = podmanTest.Podman([]string{"cp", "--pause=false", srcPath, name + ":/test1/"})
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session = podmanTest.Podman([]string{"exec", name, "cat", "/test/" + filepath.Base(srcFile.Name())})
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session.WaitWithDefaultTimeout()
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Expect(session).To(ExitWithError())
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Expect(session.ExitCode()).To(Equal(0))
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Expect(session.OutputToString()).To(ContainSubstring(string(originalContent)))
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})
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// Copy a file to a volume in the container. The tricky part is that
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// containers mustn't be running for copying, so Podman has to do some
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// intense Yoga and 1) detect volume paths on the container, 2) resolve
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// the path to the volume's mount point on the host, and 3) copy the
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// data to the volume and not the container.
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It("podman cp volume", func() {
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srcFile, err := ioutil.TempFile("", "")
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Expect(err).To(BeNil())
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defer srcFile.Close()
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defer os.Remove(srcFile.Name())
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originalContent := []byte("podman cp volume")
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err = ioutil.WriteFile(srcFile.Name(), originalContent, 0644)
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Expect(err).To(BeNil())
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session := podmanTest.Podman([]string{"volume", "create", "data"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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@ -279,23 +151,31 @@ var _ = Describe("Podman cp", func() {
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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err = ioutil.WriteFile("cp_vol", []byte("copy to the volume"), 0644)
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if err != nil {
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os.Exit(1)
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}
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session = podmanTest.Podman([]string{"cp", "cp_vol", "container1" + ":/data/cp_vol1"})
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session = podmanTest.Podman([]string{"cp", srcFile.Name(), "container1" + ":/data/file.txt"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", "container1" + ":/data/cp_vol1", "cp_vol2"})
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// Now get the volume's mount point, read the file and make
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// sure the contents match.
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session = podmanTest.Podman([]string{"volume", "inspect", "data", "--format", "{{.Mountpoint}}"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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os.Remove("cp_vol")
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os.Remove("cp_vol2")
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volumeMountPoint := session.OutputToString()
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copiedContent, err := ioutil.ReadFile(filepath.Join(volumeMountPoint, "file.txt"))
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Expect(err).To(BeNil())
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Expect(copiedContent).To(Equal(originalContent))
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})
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// Create another user in the container, let them create a file, copy
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// it to the host and back to the container and make sure that we can
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// access it, and (roughly) the right users own it.
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It("podman cp from ctr chown ", func() {
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srcFile, err := ioutil.TempFile("", "")
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Expect(err).To(BeNil())
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defer srcFile.Close()
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defer os.Remove(srcFile.Name())
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setup := podmanTest.RunTopContainer("testctr")
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setup.WaitWithDefaultTimeout()
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Expect(setup.ExitCode()).To(Equal(0))
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@ -308,17 +188,19 @@ var _ = Describe("Podman cp", func() {
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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session = podmanTest.Podman([]string{"cp", "--pause=false", "testctr:/tmp/testfile", "testfile1"})
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session = podmanTest.Podman([]string{"cp", "--pause=false", "testctr:/tmp/testfile", srcFile.Name()})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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// owner of the file copied to local machine is not testuser
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cmd := exec.Command("ls", "-l", "testfile1")
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u, err := user.Current()
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Expect(err).To(BeNil())
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cmd := exec.Command("ls", "-l", srcFile.Name())
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cmdRet, err := cmd.Output()
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Expect(err).To(BeNil())
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Expect(strings.Contains(string(cmdRet), "testuser")).To(BeFalse())
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Expect(string(cmdRet)).To(ContainSubstring(u.Username))
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session = podmanTest.Podman([]string{"cp", "--pause=false", "testfile1", "testctr:testfile2"})
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session = podmanTest.Podman([]string{"cp", "--pause=false", srcFile.Name(), "testctr:testfile2"})
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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@ -327,45 +209,35 @@ var _ = Describe("Podman cp", func() {
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session.WaitWithDefaultTimeout()
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Expect(session.ExitCode()).To(Equal(0))
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Expect(session.OutputToString()).To(ContainSubstring("root"))
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os.Remove("testfile1")
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})
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// Copy the root dir "/" of a container to the host.
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It("podman cp the root directory from the ctr to an existing directory on the host ", func() {
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imgName := "test-cp-root-dir:latest"
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DockerfileName := "Dockerfile.test-cp-root-dir"
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ctrName := "test-container-cp-root"
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session := podmanTest.Podman([]string{"build", "-f", "build/" + DockerfileName, "-t", imgName, "build/"})
|
||||
container := "copyroottohost"
|
||||
session := podmanTest.RunTopContainer(container)
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session.ExitCode()).To(Equal(0))
|
||||
|
||||
testDirPath := filepath.Join(podmanTest.RunRoot, "TestDirForCp")
|
||||
|
||||
session = podmanTest.Podman([]string{"create", "--name", ctrName, imgName, "dummy"})
|
||||
session = podmanTest.Podman([]string{"exec", container, "touch", "/dummy.txt"})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session.ExitCode()).To(Equal(0))
|
||||
|
||||
err := os.Mkdir(testDirPath, 0755)
|
||||
Expect(err).To(BeNil())
|
||||
defer os.RemoveAll(testDirPath)
|
||||
|
||||
// Copy the root directory of the container to an existing directory
|
||||
session = podmanTest.Podman([]string{"cp", ctrName + ":/", testDirPath})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session.ExitCode()).To(Equal(0))
|
||||
|
||||
// The file should be in the directory,
|
||||
// not one layer too much of the directory called merged
|
||||
checkFile := filepath.Join(testDirPath, DockerfileName)
|
||||
_, err = os.Stat(checkFile)
|
||||
tmpDir, err := ioutil.TempDir("", "")
|
||||
Expect(err).To(BeNil())
|
||||
|
||||
session = podmanTest.Podman([]string{"container", "rm", ctrName})
|
||||
session = podmanTest.Podman([]string{"cp", container + ":/", tmpDir})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session.ExitCode()).To(Equal(0))
|
||||
|
||||
session = podmanTest.Podman([]string{"rmi", "-f", imgName})
|
||||
session.WaitWithDefaultTimeout()
|
||||
Expect(session.ExitCode()).To(Equal(0))
|
||||
cmd := exec.Command("ls", "-la", tmpDir)
|
||||
output, err := cmd.Output()
|
||||
lsOutput := string(output)
|
||||
Expect(err).To(BeNil())
|
||||
Expect(lsOutput).To(ContainSubstring("dummy.txt"))
|
||||
Expect(lsOutput).To(ContainSubstring("tmp"))
|
||||
Expect(lsOutput).To(ContainSubstring("etc"))
|
||||
Expect(lsOutput).To(ContainSubstring("var"))
|
||||
Expect(lsOutput).To(ContainSubstring("bin"))
|
||||
Expect(lsOutput).To(ContainSubstring("usr"))
|
||||
})
|
||||
})
|
||||
|
||||
Reference in New Issue
Block a user