From 0e58636c3a599bb3d7d5ef06ab2773befe8a0150 Mon Sep 17 00:00:00 2001
From: Paul Holzinger <pholzing@redhat.com>
Date: Mon, 30 May 2022 15:15:57 +0200
Subject: podman machine ssh: set correct exit code

Forward the ssh exit code to the podman caller. This is useful for
scripts. Use the same logic as podman unshare.

Fixes #14401

Signed-off-by: Paul Holzinger <pholzing@redhat.com>
---
 cmd/podman/machine/ssh.go    |  4 +++-
 cmd/podman/system/unshare.go | 21 ++-------------------
 cmd/podman/utils/error.go    | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 20 deletions(-)

(limited to 'cmd')

diff --git a/cmd/podman/machine/ssh.go b/cmd/podman/machine/ssh.go
index 4a86da67a..8261f3607 100644
--- a/cmd/podman/machine/ssh.go
+++ b/cmd/podman/machine/ssh.go
@@ -9,6 +9,7 @@ import (
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/common/pkg/config"
 	"github.com/containers/podman/v4/cmd/podman/registry"
+	"github.com/containers/podman/v4/cmd/podman/utils"
 	"github.com/containers/podman/v4/pkg/machine"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -89,7 +90,8 @@ func ssh(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return errors.Wrapf(err, "vm %s not found", vmName)
 	}
-	return vm.SSH(vmName, sshOpts)
+	err = vm.SSH(vmName, sshOpts)
+	return utils.HandleOSExecError(err)
 }
 
 func remoteConnectionUsername() (string, error) {
diff --git a/cmd/podman/system/unshare.go b/cmd/podman/system/unshare.go
index 0ae5b81ad..1ed08eac3 100644
--- a/cmd/podman/system/unshare.go
+++ b/cmd/podman/system/unshare.go
@@ -2,10 +2,10 @@ package system
 
 import (
 	"os"
-	"os/exec"
 
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/podman/v4/cmd/podman/registry"
+	"github.com/containers/podman/v4/cmd/podman/utils"
 	"github.com/containers/podman/v4/pkg/domain/entities"
 	"github.com/containers/podman/v4/pkg/rootless"
 	"github.com/pkg/errors"
@@ -60,22 +60,5 @@ func unshare(cmd *cobra.Command, args []string) error {
 	}
 
 	err := registry.ContainerEngine().Unshare(registry.Context(), args, unshareOptions)
-	if err != nil {
-		if exitError, ok := err.(*exec.ExitError); ok {
-			// the user command inside the unshare env has failed
-			// we set the exit code, do not return the error to the user
-			// otherwise "exit status X" will be printed
-			registry.SetExitCode(exitError.ExitCode())
-			return nil
-		}
-		// cmd.Run() can return fs.ErrNotExist, fs.ErrPermission or exec.ErrNotFound
-		// follow podman run/exec standard with the exit codes
-		if errors.Is(err, os.ErrNotExist) || errors.Is(err, exec.ErrNotFound) {
-			registry.SetExitCode(127)
-		} else if errors.Is(err, os.ErrPermission) {
-			registry.SetExitCode(126)
-		}
-		return err
-	}
-	return nil
+	return utils.HandleOSExecError(err)
 }
diff --git a/cmd/podman/utils/error.go b/cmd/podman/utils/error.go
index 2aaa71373..3efff0301 100644
--- a/cmd/podman/utils/error.go
+++ b/cmd/podman/utils/error.go
@@ -4,10 +4,12 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"strconv"
 	"strings"
 
 	buildahCLI "github.com/containers/buildah/pkg/cli"
+	"github.com/containers/podman/v4/cmd/podman/registry"
 )
 
 type OutputErrors []error
@@ -43,3 +45,33 @@ func ExitCodeFromBuildError(errorMsg string) (int, error) {
 	}
 	return buildahCLI.ExecErrorCodeGeneric, errors.New("message does not contains a valid exit code")
 }
+
+// HandleOSExecError checks the given error for an exec.ExitError error and
+// sets the same podman exit code as the error.
+// No error will be returned in this case to make sure things like podman
+// unshare false work correctly without extra output.
+// When the exec file does not exists we set the exit code to 127, for
+// permission errors 126 is used as exit code. In this case we still return
+// the error so the user gets an error message.
+// If the error is nil it returns nil.
+func HandleOSExecError(err error) error {
+	if err == nil {
+		return nil
+	}
+	var exitError *exec.ExitError
+	if errors.As(err, &exitError) {
+		// the user command inside the unshare/ssh env has failed
+		// we set the exit code, do not return the error to the user
+		// otherwise "exit status X" will be printed
+		registry.SetExitCode(exitError.ExitCode())
+		return nil
+	}
+	// cmd.Run() can return fs.ErrNotExist, fs.ErrPermission or exec.ErrNotFound
+	// follow podman run/exec standard with the exit codes
+	if errors.Is(err, os.ErrNotExist) || errors.Is(err, exec.ErrNotFound) {
+		registry.SetExitCode(127)
+	} else if errors.Is(err, os.ErrPermission) {
+		registry.SetExitCode(126)
+	}
+	return err
+}
-- 
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