Added comments for users that can't use systemctl.

README.md

@@ -194,6 +194,11 @@ pass arguments to dmenu/rofi so their configuration is hardcoded. Also, you need
 to install
 [rofi-script-to-dmenu](https://github.com/jluttine/rofi-script-to-dmenu).
 
+## Compatibility with distributions that do not use Systemctl
+
+If you are using a distro that doesn't use `systemctl`, you need to use
+the `rofi-power-menu-void` script instead of the regular one. It uses 
+`loginctl` as an alternative, which is proven to work.
 
 ## Copyright
 

rofi-power-menu-void

@@ -0,0 +1,248 @@
+#!/usr/bin/env bash
+
+# This script defines just a mode for rofi instead of being a self-contained
+# executable that launches rofi by itself. This makes it more flexible than
+# running rofi inside this script as now the user can call rofi as one pleases.
+# For instance:
+#
+#   rofi -show powermenu -modi powermenu:./rofi-power-menu
+#
+# See README.md for more information.
+#
+# Use this script if you are using Void Linux.
+
+set -e
+set -u
+
+# All supported choices
+all=(shutdown reboot suspend hibernate logout lockscreen)
+
+# By default, show all (i.e., just copy the array)
+show=("${all[@]}")
+
+declare -A texts
+texts[lockscreen]="lock screen"
+texts[switchuser]="switch user"
+texts[logout]="log out"
+texts[suspend]="suspend"
+texts[hibernate]="hibernate"
+texts[reboot]="reboot"
+texts[shutdown]="shut down"
+
+declare -A icons
+icons[lockscreen]="\uf023"
+icons[switchuser]="\uf518"
+icons[logout]="\uf842"
+icons[suspend]="\uf9b1"
+icons[hibernate]="\uf7c9"
+icons[reboot]="\ufc07"
+icons[shutdown]="\uf011"
+icons[cancel]="\u00d7"
+
+declare -A actions
+actions[lockscreen]="loginctl lock-session ${XDG_SESSION_ID-}"
+#actions[switchuser]="???"
+actions[logout]="loginctl terminate-session ${XDG_SESSION_ID-}"
+actions[suspend]="loginctl suspend"
+actions[hibernate]="loginctl hibernate"
+actions[reboot]="loginctl reboot"
+actions[shutdown]="loginctl poweroff"
+
+# By default, ask for confirmation for actions that are irreversible
+confirmations=(reboot shutdown logout)
+
+# By default, no dry run
+dryrun=false
+showsymbols=true
+
+function check_valid {
+    option="$1"
+    shift 1
+    for entry in "${@}"
+    do
+        if [ -z "${actions[$entry]+x}" ]
+        then
+            echo "Invalid choice in $1: $entry" >&2
+            exit 1
+        fi
+    done
+}
+
+# Parse command-line options
+parsed=$(getopt --options=h --longoptions=help,dry-run,confirm:,choices:,choose:,symbols,no-symbols --name "$0" -- "$@")
+if [ $? -ne 0 ]; then
+    echo 'Terminating...' >&2
+    exit 1
+fi
+eval set -- "$parsed"
+unset parsed
+while true; do
+    case "$1" in
+        "-h"|"--help")
+            echo "rofi-power-menu - a power menu mode for Rofi"
+            echo
+            echo "Usage: rofi-power-menu [--choices CHOICES] [--confirm CHOICES]"
+            echo "                       [--choose CHOICE] [--dry-run] [--symbols|--no-symbols]"
+            echo
+            echo "Use with Rofi in script mode. For instance, to ask for shutdown or reboot:"
+            echo
+            echo "  rofi -show menu -modi \"menu:rofi-power-menu --choices=shutdown/reboot\""
+            echo
+            echo "Available options:"
+            echo "  --dry-run          Don't perform the selected action but print it to stderr."
+            echo "  --choices CHOICES  Show only the selected choices in the given order. Use / "
+            echo "                     as the separator. Available choices are lockscreen, logout,"
+            echo "                     suspend, hibernate, reboot and shutdown. By default, all"
+            echo "                     available choices are shown."
+            echo "  --confirm CHOICES  Require confirmation for the gives choices only. Use / as"
+            echo "                     the separator. Available choices are lockscreen, logout,"
+            echo "                     suspend, hibernate, reboot and shutdown. By default, only"
+            echo "                     irreversible actions logout, reboot and shutdown require"
+            echo "                     confirmation."
+            echo "  --choose CHOICE    Preselect the given choice and only ask for a confirmation"
+            echo "                     (if confirmation is set to be requested). It is strongly"
+            echo "                     recommended to combine this option with --confirm=CHOICE"
+            echo "                     if the choice wouldn't require confirmation by default."
+            echo "                     Available choices are lockscreen, logout, suspend,"
+            echo "                     hibernate, reboot and shutdown."
+            echo "  --[no-]symbols     Show Unicode symbols or not. Requires a font with support"
+            echo "                     for the symbols. Use, for instance, fonts from the"
+            echo "                     Nerdfonts collection. By default, they are shown"
+            echo "  -h,--help          Show this help text."
+            exit 0
+            ;;
+        "--dry-run")
+            dryrun=true
+            shift 1
+            ;;
+        "--confirm")
+            IFS='/' read -ra confirmations <<< "$2"
+            check_valid "$1" "${confirmations[@]}"
+            shift 2
+            ;;
+        "--choices")
+            IFS='/' read -ra show <<< "$2"
+            check_valid "$1" "${show[@]}"
+            shift 2
+            ;;
+        "--choose")
+            # Check that the choice is valid
+            check_valid "$1" "$2"
+            selectionID="$2"
+            shift 2
+            ;;
+        "--symbols")
+            showsymbols=true
+            shift 1
+            ;;
+        "--no-symbols")
+            showsymbols=false
+            shift 1
+            ;;
+        "--")
+            shift
+            break
+            ;;
+        *)
+            echo "Internal error" >&2
+            exit 1
+            ;;
+    esac
+done
+
+# Define the messages after parsing the CLI options so that it is possible to
+# configure them in the future.
+
+function write_message {
+    icon="<span font_size=\"medium\">$1</span>"
+    text="<span font_size=\"medium\">$2</span>"
+    if [ "$showsymbols" = "true" ]
+    then
+        echo -n "\u200e$icon \u2068$text\u2069"
+    else
+        echo -n "$text"
+    fi
+}
+
+function print_selection {
+    echo -e "$1" | $(read -r -d '' entry; echo "echo $entry")
+}
+
+declare -A messages
+declare -A confirmationMessages
+for entry in "${all[@]}"
+do
+    messages[$entry]=$(write_message "${icons[$entry]}" "${texts[$entry]^}")
+done
+for entry in "${all[@]}"
+do
+    confirmationMessages[$entry]=$(write_message "${icons[$entry]}" "Yes, ${texts[$entry]}")
+done
+confirmationMessages[cancel]=$(write_message "${icons[cancel]}" "No, cancel")
+
+if [ $# -gt 0 ]
+then
+    # If arguments given, use those as the selection
+    selection="${@}"
+else
+    # Otherwise, use the CLI passed choice if given
+    if [ -n "${selectionID+x}" ]
+    then
+        selection="${messages[$selectionID]}"
+    fi
+fi
+
+# Don't allow custom entries
+echo -e "\0no-custom\x1ftrue"
+# Use markup
+echo -e "\0markup-rows\x1ftrue"
+
+if [ -z "${selection+x}" ]
+then
+    echo -e "\0prompt\x1fPower menu"
+    for entry in "${show[@]}"
+    do
+        echo -e "${messages[$entry]}\0icon\x1f${icons[$entry]}"
+    done
+else
+    for entry in "${show[@]}"
+    do
+        if [ "$selection" = "$(print_selection "${messages[$entry]}")" ]
+        then
+            # Check if the selected entry is listed in confirmation requirements
+            for confirmation in "${confirmations[@]}"
+            do
+                if [ "$entry" = "$confirmation" ]
+                then
+                    # Ask for confirmation
+                    echo -e "\0prompt\x1fAre you sure"
+                    echo -e "${confirmationMessages[$entry]}\0icon\x1f${icons[$entry]}"
+                    echo -e "${confirmationMessages[cancel]}\0icon\x1f${icons[cancel]}"
+                    exit 0
+                fi
+            done
+            # If not, then no confirmation is required, so mark confirmed
+            selection=$(print_selection "${confirmationMessages[$entry]}")
+        fi
+        if [ "$selection" = "$(print_selection "${confirmationMessages[$entry]}")" ]
+        then
+            if [ $dryrun = true ]
+            then
+                # Tell what would have been done
+                echo "Selected: $entry" >&2
+            else
+                # Perform the action
+                ${actions[$entry]}
+            fi
+            exit 0
+        fi
+        if [ "$selection" = "$(print_selection "${confirmationMessages[cancel]}")" ]
+        then
+            # Do nothing
+            exit 0
+        fi
+    done
+    # The selection didn't match anything, so raise an error
+    echo "Invalid selection: $selection" >&2
+    exit 1
+fi