Merge pull request #8823 from giuseppe/exec-honor-privileged

exec: honor --privileged

libpod/oci_conmon_exec_linux.go

@@ -387,7 +387,7 @@ func (r *ConmonOCIRuntime) startExec(c *Container, sessionID string, options *Ex
 		finalEnv = append(finalEnv, fmt.Sprintf("%s=%s", k, v))
 	}
 
-	processFile, err := prepareProcessExec(c, options.Cmd, finalEnv, options.Terminal, options.Cwd, options.User, sessionID)
+	processFile, err := prepareProcessExec(c, options, finalEnv, sessionID)
 	if err != nil {
 		return nil, nil, err
 	}

libpod/oci_conmon_linux.go

@@ -1185,26 +1185,33 @@ func (r *ConmonOCIRuntime) createOCIContainer(ctr *Container, restoreOptions *Co
 
 // prepareProcessExec returns the path of the process.json used in runc exec -p
 // caller is responsible to close the returned *os.File if needed.
-func prepareProcessExec(c *Container, cmd, env []string, tty bool, cwd, user, sessionID string) (*os.File, error) {
+func prepareProcessExec(c *Container, options *ExecOptions, env []string, sessionID string) (*os.File, error) {
 	f, err := ioutil.TempFile(c.execBundlePath(sessionID), "exec-process-")
 	if err != nil {
 		return nil, err
 	}
 	pspec := c.config.Spec.Process
 	pspec.SelinuxLabel = c.config.ProcessLabel
-	pspec.Args = cmd
+	pspec.Args = options.Cmd
+	for _, cap := range options.CapAdd {
+		pspec.Capabilities.Bounding = append(pspec.Capabilities.Bounding, cap)
+		pspec.Capabilities.Effective = append(pspec.Capabilities.Effective, cap)
+		pspec.Capabilities.Inheritable = append(pspec.Capabilities.Inheritable, cap)
+		pspec.Capabilities.Permitted = append(pspec.Capabilities.Permitted, cap)
+		pspec.Capabilities.Ambient = append(pspec.Capabilities.Ambient, cap)
+	}
 	// We need to default this to false else it will inherit terminal as true
 	// from the container.
 	pspec.Terminal = false
-	if tty {
+	if options.Terminal {
 		pspec.Terminal = true
 	}
 	if len(env) > 0 {
 		pspec.Env = append(pspec.Env, env...)
 	}
 
-	if cwd != "" {
-		pspec.Cwd = cwd
+	if options.Cwd != "" {
+		pspec.Cwd = options.Cwd
 
 	}
 
@@ -1212,6 +1219,7 @@ func prepareProcessExec(c *Container, cmd, env []string, tty bool, cwd, user, se
 	var sgids []uint32
 
 	// if the user is empty, we should inherit the user that the container is currently running with
+	user := options.User
 	if user == "" {
 		user = c.config.User
 		addGroups = c.config.Groups

test/e2e/exec_test.go

@@ -119,6 +119,21 @@ var _ = Describe("Podman exec", func() {
 		Expect(session.ExitCode()).To(Equal(100))
 	})
 
+	It("podman exec --privileged", func() {
+		hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
+		Expect(hostCap.ExitCode()).To(Equal(0))
+
+		setup := podmanTest.RunTopContainer("test-privileged")
+		setup.WaitWithDefaultTimeout()
+		Expect(setup.ExitCode()).To(Equal(0))
+
+		session := podmanTest.Podman([]string{"exec", "--privileged", "test-privileged", "sh", "-c", "grep ^CapEff /proc/self/status | cut -f 2"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
+	})
+
 	It("podman exec terminal doesn't hang", func() {
 		setup := podmanTest.Podman([]string{"run", "-dti", "--name", "test1", fedoraMinimal, "sleep", "+Inf"})
 		setup.WaitWithDefaultTimeout()

test/e2e/run_privileged_test.go

@@ -16,22 +16,22 @@ import (
 // know about at compile time. That is: the kernel may have more caps
 // available than we are aware of, leading to host=FFF... and ctr=3FF...
 // because the latter is all we request. Accept that.
-func containerCapMatchesHost(ctr_cap string, host_cap string) {
+func containerCapMatchesHost(ctrCap string, hostCap string) {
 	if isRootless() {
 		return
 	}
-	ctr_cap_n, err := strconv.ParseUint(ctr_cap, 16, 64)
-	Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", ctr_cap)
+	ctrCap_n, err := strconv.ParseUint(ctrCap, 16, 64)
+	Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", ctrCap)
 
-	host_cap_n, err := strconv.ParseUint(host_cap, 16, 64)
-	Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", host_cap)
+	hostCap_n, err := strconv.ParseUint(hostCap, 16, 64)
+	Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", hostCap)
 
 	// host caps can never be zero (except rootless).
 	// and host caps must always be a superset (inclusive) of container
-	Expect(host_cap_n).To(BeNumerically(">", 0), "host cap %q should be nonzero", host_cap)
-	Expect(host_cap_n).To(BeNumerically(">=", ctr_cap_n), "host cap %q should never be less than container cap %q", host_cap, ctr_cap)
-	host_cap_masked := host_cap_n & (1<<len(capability.List()) - 1)
-	Expect(ctr_cap_n).To(Equal(host_cap_masked), "container cap %q is not a subset of host cap %q", ctr_cap, host_cap)
+	Expect(hostCap_n).To(BeNumerically(">", 0), "host cap %q should be nonzero", hostCap)
+	Expect(hostCap_n).To(BeNumerically(">=", ctrCap_n), "host cap %q should never be less than container cap %q", hostCap, ctrCap)
+	hostCap_masked := hostCap_n & (1<<len(capability.List()) - 1)
+	Expect(ctrCap_n).To(Equal(hostCap_masked), "container cap %q is not a subset of host cap %q", ctrCap, hostCap)
 }
 
 var _ = Describe("Podman privileged container tests", func() {
@@ -68,38 +68,38 @@ var _ = Describe("Podman privileged container tests", func() {
 	})
 
 	It("podman privileged CapEff", func() {
-		host_cap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
-		Expect(host_cap.ExitCode()).To(Equal(0))
+		hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
+		Expect(hostCap.ExitCode()).To(Equal(0))
 
 		session := podmanTest.Podman([]string{"run", "--privileged", "busybox", "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
 		session.WaitWithDefaultTimeout()
 		Expect(session.ExitCode()).To(Equal(0))
 
-		containerCapMatchesHost(session.OutputToString(), host_cap.OutputToString())
+		containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
 	})
 
 	It("podman cap-add CapEff", func() {
 		// Get caps of current process
-		host_cap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
-		Expect(host_cap.ExitCode()).To(Equal(0))
+		hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
+		Expect(hostCap.ExitCode()).To(Equal(0))
 
 		session := podmanTest.Podman([]string{"run", "--cap-add", "all", "busybox", "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
 		session.WaitWithDefaultTimeout()
 		Expect(session.ExitCode()).To(Equal(0))
 
-		containerCapMatchesHost(session.OutputToString(), host_cap.OutputToString())
+		containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
 	})
 
 	It("podman cap-add CapEff with --user", func() {
 		// Get caps of current process
-		host_cap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
-		Expect(host_cap.ExitCode()).To(Equal(0))
+		hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
+		Expect(hostCap.ExitCode()).To(Equal(0))
 
 		session := podmanTest.Podman([]string{"run", "--user=bin", "--cap-add", "all", "busybox", "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
 		session.WaitWithDefaultTimeout()
 		Expect(session.ExitCode()).To(Equal(0))
 
-		containerCapMatchesHost(session.OutputToString(), host_cap.OutputToString())
+		containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
 	})
 
 	It("podman cap-drop CapEff", func() {