create dynamic devfs ruleset from configured or default

cmd/utils.go

@@ -414,6 +414,59 @@ func getDatastoreFromArray(name string, dsa []Datastore) (*Datastore, error) {
 	return &Datastore{}, errors.New("Datastore not found")
 }
 
+func getDevfsRuleset(ruleset int) []string {
+	cmd := fmt.Sprintf("/sbin/devfs rule -s %d show", ruleset)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		return []string{}
+	}
+	// Get rid of the last "\n"
+	return strings.Split(out, "\n")[:len(strings.Split(out, "\n"))-1]
+}
+
+func copyDevfsRuleset(ruleset int, srcrs int) error {
+	// Resulting ruleset as an array of line
+	//var result []string
+	out := getDevfsRuleset(srcrs)
+	for _, line := range out {
+		//fields := strings.Fields(line)
+		cmd := fmt.Sprintf("/sbin/devfs rule -s %d add %s", ruleset, line)
+		out, err := executeCommand(cmd)
+		if err != nil {
+			return errors.New(fmt.Sprintf("Error adding rule \"%s\" to ruleset %d: %s", line, ruleset, out))
+		}
+	}
+	
+	return nil
+}
+
+/********************************************************************************
+ * Add a rule to specified ruleset
+ * Ex.: addDevfsRuleToRuleset("path bpf* unhide", 1002)
+ *******************************************************************************/
+func addDevfsRuleToRuleset(rule string, ruleset int) error {
+	// TODO: Check if rule not already enabled. We will need to recurse into includes.
+	// Get last rule index
+	rules := getDevfsRuleset(ruleset)
+	if len(rules) == 0 {
+		fmt.Printf("Error listing ruleset %d\n", ruleset)
+		return errors.New(fmt.Sprintf("Error listing rueset %d\n", ruleset))
+	}
+	
+	f := strings.Fields(rules[(len(rules)-1)])
+	//fmt.Printf("Dernier index du ruleset %d: %s\n", ruleset, f[0])
+	index, _ := strconv.Atoi(f[0])
+	index += 100
+	
+	cmd := fmt.Sprintf("/sbin/devfs rule -s %d add %d %s", ruleset, index, rule)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		return errors.New(fmt.Sprintf("Error adding rule \"%s\" to ruleset %d: %s", rule, ruleset, out))
+	}
+	
+	return nil
+}
+
 /******************************************************************************
  * Return the quantity of jails with the name passed as parameter
  *****************************************************************************/