Merge 8b60120342 into bbb1c85cad

fix #191

Co-authored-by: Romain de Laage <romain.delaage@rdelaage.ovh>

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21-alpine as builder
+FROM golang:1.22-alpine as builder
 
 WORKDIR /app
 COPY go.* .
@@ -7,7 +7,7 @@ COPY . .
 RUN go build
 
 FROM restic/restic:0.16.4
-RUN apk add --no-cache rclone bash curl
+RUN apk add --no-cache rclone bash curl docker-cli
 COPY --from=builder /app/autorestic /usr/bin/autorestic
 ENTRYPOINT []
 CMD [ "autorestic" ]

cmd/unlock.go

@@ -0,0 +1,79 @@
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/cupcakearmy/autorestic/internal"
+	"github.com/cupcakearmy/autorestic/internal/colors"
+	"github.com/cupcakearmy/autorestic/internal/lock"
+	"github.com/spf13/cobra"
+)
+
+var unlockCmd = &cobra.Command{
+	Use:   "unlock",
+	Short: "Unlock autorestic only if you are sure that no other instance is running",
+	Long: `Unlock autorestic only if you are sure that no other instance is running.
+To check you can run "ps aux | grep autorestic".`,
+	Run: func(cmd *cobra.Command, args []string) {
+		internal.GetConfig()
+
+		force, _ := cmd.Flags().GetBool("force")
+
+		if !force && isAutoresticRunning() {
+			colors.Error.Print("Another autorestic instance is running. Are you sure you want to unlock? (yes/no): ")
+			var response string
+			fmt.Scanln(&response)
+			if strings.ToLower(response) != "yes" {
+				colors.Primary.Println("Unlocking aborted.")
+				return
+			}
+		}
+
+		err := lock.Unlock()
+		if err != nil {
+			colors.Error.Println("Could not unlock:", err)
+			return
+		}
+
+		colors.Success.Println("Unlock successful")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(unlockCmd)
+	unlockCmd.Flags().Bool("force", false, "force unlock")
+}
+
+// isAutoresticRunning checks if autorestic is running
+// and returns true if it is.
+// It also prints the processes to stdout.
+func isAutoresticRunning() bool {
+	cmd := exec.Command("sh", "-c", "ps aux | grep autorestic")
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
+	if err != nil {
+		return false
+	}
+
+	lines := strings.Split(out.String(), "\n")
+	autoresticProcesses := []string{}
+
+	for _, line := range lines {
+		if strings.Contains(line, "autorestic") && !strings.Contains(line, "grep autorestic") {
+			autoresticProcesses = append(autoresticProcesses, line)
+		}
+	}
+
+	if len(autoresticProcesses) > 0 {
+		colors.Faint.Println("Found autorestic processes:")
+		for _, proc := range autoresticProcesses {
+			colors.Faint.Println(proc)
+		}
+		return true
+	}
+	return false
+}

docs/pages/cli/unlock.md

@@ -0,0 +1,32 @@
+# Unlock
+
+In case autorestic throws the error message `an instance is already running. exiting`, but there is no instance running you can unlock the lock.
+
+To verify that there is no instance running you can use `ps aux | grep autorestic`.
+
+Example with no instance running:
+
+```bash
+> ps aux | grep autorestic
+root       39260  0.0  0.0   6976  2696 pts/11   S+   19:41   0:00 grep autorestic
+```
+
+Example with an instance running:
+
+```bash
+> ps aux | grep autorestic
+root       29465  0.0  0.0 1162068 7380 pts/7    Sl+  19:28   0:00 autorestic --ci backup -a
+root       39260  0.0  0.0   6976  2696 pts/11   S+   19:41   0:00 grep autorestic
+```
+
+**If an instance is running you should not unlock as it could lead to data loss!**
+
+```bash
+autorestic unlock
+```
+
+Use the `--force` to prevent the confirmation prompt if an instance is running.
+
+```bash
+autorestic unlock --force
+```

internal/backend.go

@@ -143,6 +143,7 @@ func (b Backend) Exec(args []string) error {
 		return err
 	}
 	options := ExecuteOptions{Envs: env}
+	args = append(args, combineBackendOptions("exec", b)...)
 	_, out, err := ExecuteResticCommand(options, args...)
 	if err != nil {
 		colors.Error.Println(out)

internal/bins/bins.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path"
@@ -37,7 +36,7 @@ func dlJSON(url string) (GithubRelease, error) {
 		return parsed, err
 	}
 	defer resp.Body.Close()
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return parsed, err
 
@@ -73,9 +72,10 @@ func downloadAndInstallAsset(body GithubRelease, name string) error {
 			// Uncompress
 			bz := bzip2.NewReader(resp.Body)
 
-			// Save to tmp
-			// Linux does not support overwriting the file that is currently being overwritten, but it can be deleted and a new one moved in its place.
-			tmp, err := ioutil.TempFile(os.TempDir(), "autorestic-")
+			// Save to tmp file in the same directory as the install directory
+			// Linux does not support overwriting the file that is currently being running
+			// But it can be delete the old one and a new one moved in its place.
+			tmp, err := os.CreateTemp(INSTALL_PATH, "autorestic-")
 			if err != nil {
 				return err
 			}
@@ -89,23 +89,25 @@ func downloadAndInstallAsset(body GithubRelease, name string) error {
 
 			to := path.Join(INSTALL_PATH, name)
 			defer os.Remove(tmp.Name()) // Cleanup temporary file after thread exits
-			if err := os.Rename(tmp.Name(), to); err != nil {
-				colors.Error.Printf("os.Rename() failed (%v), retrying with io.Copy()\n", err.Error())
-				var src *os.File
-				var dst *os.File
-				if src, err = os.Open(tmp.Name()); err != nil {
+
+			mode := os.FileMode(0755)
+			if originalBin, err := os.Lstat(to); err == nil {
+				mode = originalBin.Mode()
+				err := os.Remove(to)
+				if err != nil {
 					return err
 				}
-				if dst, err = os.Create(to); err != nil {
+			}
+
+			err = os.Rename(tmp.Name(), to)
+			if err != nil {
 				return err
 			}
-				if _, err := io.Copy(dst, src); err != nil {
+
+			err = os.Chmod(to, mode)
+			if err != nil {
 				return err
 			}
-				if err := os.Chmod(to, 0755); err != nil {
-					return err
-				}
-			}
 
 			colors.Success.Printf("Successfully installed '%s' under %s\n", name, INSTALL_PATH)
 			return nil