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| 1 | +package containerd |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "log/slog" |
| 6 | + "os" |
| 7 | + "os/exec" |
| 8 | +) |
| 9 | + |
| 10 | +// UsesSystemd checks if the system is using systemd |
| 11 | +// by running the "systemctl is-system-running" command. |
| 12 | +// NOTE: this limits support to systems using systemctl to manage systemd |
| 13 | +func UsesSystemd() bool { |
| 14 | + // Check if is a systemd system |
| 15 | + cmd := nsenterCmd("systemctl", "is-system-running", "--quiet") |
| 16 | + if err := cmd.Run(); err != nil { |
| 17 | + slog.Info("Error with systemctl: %w\n", "error", err) |
| 18 | + return false |
| 19 | + } |
| 20 | + return true |
| 21 | +} |
| 22 | + |
| 23 | +// InstallDbus checks if D-Bus service is installed and active. If not, installs D-Bus |
| 24 | +// and starts the service. |
| 25 | +// NOTE: this limits support to systems using systemctl to manage systemd. |
| 26 | +func InstallDbus() error { |
| 27 | + cmd := nsenterCmd("systemctl", "is-active", "dbus", "--quiet") |
| 28 | + if err := cmd.Run(); err == nil { |
| 29 | + slog.Info("D-Bus is already installed and running") |
| 30 | + return nil |
| 31 | + } |
| 32 | + slog.Info("Installing D-Bus") |
| 33 | + whichApt := nsenterCmd("which", "apt-get") |
| 34 | + whichYum := nsenterCmd("which", "yum") |
| 35 | + whichDnf := nsenterCmd("which", "dnf") |
| 36 | + whichApk := nsenterCmd("which", "apk") |
| 37 | + if err := whichApt.Run(); err == nil { |
| 38 | + cmd = nsenterCmd("apt-get", "update", "--yes") |
| 39 | + if err := cmd.Run(); err != nil { |
| 40 | + return fmt.Errorf("failed to update apt: %w", err) |
| 41 | + } |
| 42 | + cmd = nsenterCmd("apt-get", "install", "--yes", "dbus") |
| 43 | + if err := cmd.Run(); err != nil { |
| 44 | + return fmt.Errorf("failed to install D-Bus with apt: %w", err) |
| 45 | + } |
| 46 | + } else if err = whichDnf.Run(); err == nil { |
| 47 | + cmd = nsenterCmd("dnf", "install", "--yes", "dbus") |
| 48 | + if err := cmd.Run(); err != nil { |
| 49 | + return fmt.Errorf("failed to install D-Bus with dnf: %w", err) |
| 50 | + } |
| 51 | + } else if err = whichApk.Run(); err == nil { |
| 52 | + cmd = nsenterCmd("apk", "add", "dbus") |
| 53 | + if err := cmd.Run(); err != nil { |
| 54 | + return fmt.Errorf("failed to install D-Bus with apk: %w", err) |
| 55 | + } |
| 56 | + } else if err = whichYum.Run(); err == nil { |
| 57 | + cmd = nsenterCmd("yum", "install", "--yes", "dbus") |
| 58 | + if err := cmd.Run(); err != nil { |
| 59 | + return fmt.Errorf("failed to install D-Bus with yum: %w", err) |
| 60 | + } |
| 61 | + } else { |
| 62 | + slog.Info("WARNING: Could not install D-Bus. No supported package manager found.") |
| 63 | + return nil |
| 64 | + } |
| 65 | + |
| 66 | + slog.Info("Restarting D-Bus") |
| 67 | + cmd = nsenterCmd("systemctl", "restart", "dbus") |
| 68 | + if err := cmd.Run(); err != nil { |
| 69 | + return fmt.Errorf("failed to restart D-Bus: %w", err) |
| 70 | + } |
| 71 | + |
| 72 | + return nil |
| 73 | +} |
| 74 | + |
| 75 | +func nsenterCmd(cmd ...string) *exec.Cmd { |
| 76 | + return exec.Command("nsenter", |
| 77 | + append([]string{fmt.Sprintf("-m/%s/proc/1/ns/mnt", os.Getenv("HOST_ROOT")), "--"}, cmd...)...) // #nosec G204 |
| 78 | +} |
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