ask user to install a pkexec policy when running freeipmi with pkexec (#273)

freon@UshakovVasilii_Github.yahoo.com/extension.js

@@ -255,7 +255,17 @@ const FreonMenuButton = GObject.registerClass(class Freon_FreonMenuButton extend
 
     _initFreeipmiUtility() {
         if (this._settings.get_boolean('use-generic-freeipmi'))
-            this._utils.freeipmi = new FreeipmiUtil(this._settings.get_string('exec-method-freeipmi'));
+        {
+            let exec_method = this._settings.get_string('exec-method-freeipmi');
+            try {
+                this._utils.freeipmi = new FreeipmiUtil(exec_method);
+            } catch (e) {
+                if (exec_method != 'direct') {
+                    this._settings.set_string('exec-method-freeipmi', 'direct');
+                    this._freeipmiUtilityChanged();
+                }
+            }
+        }
     }
 
     _destroyFreeipmiUtility() {

freon@UshakovVasilii_Github.yahoo.com/freeipmiUtil.js

@@ -1,6 +1,7 @@
 import GLib from 'gi://GLib';
 
 import CommandLineUtil from './commandLineUtil.js';
+import PkexecUtil from './pkexecUtil.js';
 
 export default class FreeipmiUtil extends CommandLineUtil {
 
@@ -13,6 +14,10 @@ export default class FreeipmiUtil extends CommandLineUtil {
 
         if (this._argv && exec_method === 'pkexec')
         {
+            let pkexecUtil = new PkexecUtil('ipmi-sensors');
+            if (!pkexecUtil.checkOrInstall()) {
+                throw 'cannot run ipmi-sensors with pkexec';
+            }
             const pkexec_path = GLib.find_program_in_path('pkexec');
             this._argv = pkexec_path ? [pkexec_path].concat(this._argv) : null;
         }

freon@UshakovVasilii_Github.yahoo.com/pkexecUtil.js

@@ -0,0 +1,66 @@
+import GLib from 'gi://GLib';
+import Gio from 'gi://Gio';
+
+export default class PkexecUtil {
+    constructor(name) {
+        this._name = name;
+        this._policy = 'com.github.UshakovVasilii.freon.' + name + '.policy';
+        this._actions = '/usr/share/polkit-1/actions'
+        this._pkexec = GLib.find_program_in_path('pkexec');
+        // Currently hardcoded in policy file.
+        this._bin = '/usr/sbin/' + name;
+		this._dir = this.dir();
+    }
+
+    dir() {
+        let uri = (new Error()).stack.split('\n')[1];
+        if (!uri.startsWith('install@file://')) {
+            return null;
+        }
+        return Gio.File.new_for_path(uri.substring(15)).get_parent().get_path();
+    }
+
+    available_pkexec() {
+        return !!this._pkexec;
+    }
+
+    available_bin() {
+        return GLib.find_program_in_path(this._name) == this._bin;
+    }
+
+    installed() {
+        return GLib.file_test(this._actions + '/' + this._policy, GLib.FileTest.EXISTS);
+    }
+
+    run(command) {
+        return GLib.spawn_command_line_sync(this._pkexec + ' ' + command);
+    }
+
+    install() {
+        try {
+            this.run('install "' + this._dir + '/policies/' + this._policy + '" ' + this._actions);
+        } catch(e) {}
+        if (!this.installed())
+        {
+            log('[FREON] failed to install ' + this._name + ' pkexec policy');
+            return false;
+        }
+        return true;
+    }
+
+    checkOrInstall() {
+        if (!this.available_pkexec()) {
+            log('[FREON] pkexec is not available');
+            return false;
+        }
+        if (!this.available_bin()) {
+            log('[FREON] ' + this._bin + ' is not available');
+            return false;
+        }
+        if (!this.installed()) {
+            log('[FREON] ' + this._name + ' policy is not installed yet');
+            return this.install();
+        }
+        return true;
+    }
+}

freon@UshakovVasilii_Github.yahoo.com/policies/com.github.UshakovVasilii.freon.ipmi-sensors.policy

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE policyconfig PUBLIC "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
+	"http://www.freedesktop.org/standards/PolicyKit/1/policyconfig.dtd">
+<policyconfig>
+	<vendor>Vasilii Ushakov</vendor>
+	<vendor_url>https://github.com/UshakovVasilii</vendor_url>
+
+	<action id="com.github.UshakovVasilii.freon.ipmi-sensors.policy">
+		<description>Run ipmi-sensors</description>
+		<message>No Authorization required to run ipmi-sensors.</message>
+		<defaults>
+			<allow_any>yes</allow_any>
+			<allow_inactive>yes</allow_inactive>
+			<allow_active>yes</allow_active>
+		</defaults>
+		<annotate key="org.freedesktop.policykit.exec.path">/usr/sbin/ipmi-sensors</annotate>
+	</action>
+</policyconfig>