| 1 | #!/bin/bash |
| 2 | # Safely swap display managers (e.g., SDDM -> gardm) |
| 3 | # This script includes safety checks and rollback instructions |
| 4 | |
| 5 | set -e |
| 6 | |
| 7 | RED='\033[0;31m' |
| 8 | GREEN='\033[0;32m' |
| 9 | YELLOW='\033[1;33m' |
| 10 | BLUE='\033[0;34m' |
| 11 | NC='\033[0m' |
| 12 | |
| 13 | log_info() { |
| 14 | echo -e "${GREEN}[INFO]${NC} $1" |
| 15 | } |
| 16 | |
| 17 | log_warn() { |
| 18 | echo -e "${YELLOW}[WARN]${NC} $1" |
| 19 | } |
| 20 | |
| 21 | log_error() { |
| 22 | echo -e "${RED}[ERROR]${NC} $1" |
| 23 | } |
| 24 | |
| 25 | log_step() { |
| 26 | echo -e "${BLUE}[STEP]${NC} $1" |
| 27 | } |
| 28 | |
| 29 | if [ "$EUID" -ne 0 ]; then |
| 30 | log_error "Please run as root (sudo ./swap-dm.sh)" |
| 31 | exit 1 |
| 32 | fi |
| 33 | |
| 34 | echo "============================================" |
| 35 | echo " gardm Display Manager Swap Utility" |
| 36 | echo "============================================" |
| 37 | echo "" |
| 38 | |
| 39 | # Detect current display manager |
| 40 | CURRENT_DM="" |
| 41 | for dm in sddm gdm gdm3 lightdm lxdm; do |
| 42 | if systemctl is-enabled "$dm" >/dev/null 2>&1; then |
| 43 | CURRENT_DM="$dm" |
| 44 | break |
| 45 | fi |
| 46 | done |
| 47 | |
| 48 | if [ -z "$CURRENT_DM" ]; then |
| 49 | log_warn "Could not detect current display manager" |
| 50 | echo "Which display manager are you currently using?" |
| 51 | echo " 1) sddm" |
| 52 | echo " 2) gdm" |
| 53 | echo " 3) lightdm" |
| 54 | echo " 4) other" |
| 55 | read -p "Selection [1-4]: " choice |
| 56 | case $choice in |
| 57 | 1) CURRENT_DM="sddm" ;; |
| 58 | 2) CURRENT_DM="gdm" ;; |
| 59 | 3) CURRENT_DM="lightdm" ;; |
| 60 | *) |
| 61 | read -p "Enter the service name: " CURRENT_DM |
| 62 | ;; |
| 63 | esac |
| 64 | fi |
| 65 | |
| 66 | log_info "Detected current display manager: $CURRENT_DM" |
| 67 | echo "" |
| 68 | |
| 69 | # Pre-flight checks |
| 70 | log_step "Running pre-flight checks..." |
| 71 | |
| 72 | # Check gardm is installed |
| 73 | if [ ! -x /usr/bin/gardmd ]; then |
| 74 | log_error "gardmd not found at /usr/bin/gardmd" |
| 75 | log_error "Please run install.sh first" |
| 76 | exit 1 |
| 77 | fi |
| 78 | |
| 79 | if [ ! -x /usr/bin/gardm-greeter ]; then |
| 80 | log_error "gardm-greeter not found at /usr/bin/gardm-greeter" |
| 81 | log_error "Please run install.sh first" |
| 82 | exit 1 |
| 83 | fi |
| 84 | |
| 85 | # Check systemd service exists |
| 86 | if [ ! -f /usr/lib/systemd/system/gardm.service ]; then |
| 87 | log_error "gardm.service not found" |
| 88 | log_error "Please run install.sh first" |
| 89 | exit 1 |
| 90 | fi |
| 91 | |
| 92 | # Check PAM config |
| 93 | if [ ! -f /etc/pam.d/gardm ]; then |
| 94 | log_error "PAM configuration not found at /etc/pam.d/gardm" |
| 95 | log_error "Please run install.sh first" |
| 96 | exit 1 |
| 97 | fi |
| 98 | |
| 99 | log_info "All pre-flight checks passed" |
| 100 | echo "" |
| 101 | |
| 102 | # Safety warnings |
| 103 | echo "============================================" |
| 104 | echo " IMPORTANT SAFETY INFORMATION" |
| 105 | echo "============================================" |
| 106 | echo "" |
| 107 | log_warn "Swapping display managers can prevent graphical login!" |
| 108 | echo "" |
| 109 | echo "BEFORE PROCEEDING, ensure you can:" |
| 110 | echo " 1. Switch to a TTY (Ctrl+Alt+F2 through F6)" |
| 111 | echo " 2. Log in via TTY as your user" |
| 112 | echo " 3. Have root/sudo access from TTY" |
| 113 | echo "" |
| 114 | echo "ROLLBACK PROCEDURE (if gardm fails):" |
| 115 | echo " 1. Switch to TTY: Ctrl+Alt+F2" |
| 116 | echo " 2. Log in as your user" |
| 117 | echo " 3. Run: sudo systemctl disable gardm" |
| 118 | echo " 4. Run: sudo systemctl enable $CURRENT_DM" |
| 119 | echo " 5. Reboot: sudo reboot" |
| 120 | echo "" |
| 121 | |
| 122 | read -p "Have you tested gardm with test-gardm.sh? [y/N]: " tested |
| 123 | if [ "$tested" != "y" ] && [ "$tested" != "Y" ]; then |
| 124 | log_warn "It's recommended to test gardm first!" |
| 125 | log_warn "Run: sudo ./test-gardm.sh" |
| 126 | echo "" |
| 127 | read -p "Continue anyway? [y/N]: " continue |
| 128 | if [ "$continue" != "y" ] && [ "$continue" != "Y" ]; then |
| 129 | log_info "Aborted. Please test gardm first." |
| 130 | exit 0 |
| 131 | fi |
| 132 | fi |
| 133 | |
| 134 | echo "" |
| 135 | read -p "Ready to swap $CURRENT_DM -> gardm? [y/N]: " confirm |
| 136 | if [ "$confirm" != "y" ] && [ "$confirm" != "Y" ]; then |
| 137 | log_info "Aborted by user" |
| 138 | exit 0 |
| 139 | fi |
| 140 | |
| 141 | echo "" |
| 142 | log_step "Disabling $CURRENT_DM..." |
| 143 | systemctl disable "$CURRENT_DM" |
| 144 | |
| 145 | log_step "Enabling gardm..." |
| 146 | systemctl enable gardm |
| 147 | |
| 148 | echo "" |
| 149 | log_info "Display manager swap complete!" |
| 150 | echo "" |
| 151 | echo "============================================" |
| 152 | echo " NEXT STEPS" |
| 153 | echo "============================================" |
| 154 | echo "" |
| 155 | echo "1. Reboot your system: sudo reboot" |
| 156 | echo "2. gardm should start instead of $CURRENT_DM" |
| 157 | echo "" |
| 158 | echo "If gardm fails to start:" |
| 159 | echo " - Switch to TTY (Ctrl+Alt+F2)" |
| 160 | echo " - Run: sudo systemctl disable gardm" |
| 161 | echo " - Run: sudo systemctl enable $CURRENT_DM" |
| 162 | echo " - Run: sudo reboot" |
| 163 | echo "" |
| 164 | echo "To check gardm status after reboot:" |
| 165 | echo " systemctl status gardm" |
| 166 | echo " journalctl -u gardm -b" |
| 167 | echo "" |
| 168 | |
| 169 | read -p "Reboot now? [y/N]: " reboot_now |
| 170 | if [ "$reboot_now" = "y" ] || [ "$reboot_now" = "Y" ]; then |
| 171 | log_info "Rebooting..." |
| 172 | reboot |
| 173 | fi |