Add executeCommandWithStdinStdoutStderr

cmd/utils.go

@@ -365,9 +365,83 @@ func executeCommandWithOutputToStdout(cmdline string) (error) {
 	return fmt.Errorf("Unknown error: you shouldn't be here!\n")
 }
 
+/* Execute command plugging stdin and stdout to those of the running command.
+ * Blocking while the command run
+ */
+func executeCommandWithStdinStdoutStderr(cmdline string) (error) {
+	var cmd []string
+
+	if gUseSudo {
+		cmd = append(cmd, "sudo")
+	}
+
+	var word string
+	var in_escaped bool
+	// Split by words, or " enclosed words
+	for i, c := range (cmdline) {
+		if string(c) == "\"" {
+			if in_escaped {
+				// This is the closing "
+				cmd = append(cmd, word)
+				in_escaped = false
+			} else {
+				in_escaped = true
+			}
+			continue
+		}
+		if string(c) == " " {
+			if in_escaped {
+				word = word + string(c)
+				continue
+			} else {
+				cmd = append(cmd, word)
+				word = ""
+				continue
+			}
+		}
+		if i == (len(cmdline) - 1) {
+			word = word + string(c)
+			cmd = append(cmd, word)
+			break
+		}
+
+		// else
+		word = word + string(c)
+	}
+
+	var command *exec.Cmd
+	if len(cmd) > 1 {
+		command = exec.Command(cmd[0], cmd[1:]...)
+	} else {
+		command = exec.Command(cmd[0])
+	}
+
+	// Get environment
+	command.Env = os.Environ()
+
+	// Connect command to current stdin/out/err
+	command.Stdin = os.Stdin
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+
+	if err := command.Start(); err != nil {
+		return err
+	}
+
+	err := command.Wait()
+
+	return err
+}
+
+
 func executeCommandInJail(jail *Jail, cmdline string) (string, error) {
 	var cmd []string
 
+	// We can't execute on non-running jail
+	if jail.Running == false {
+		return "", errors.New("Can't execute command on stopped jail")
+	}
+
 	if gUseSudo {
 		cmd = append(cmd, "sudo")
 	}
@@ -414,6 +488,10 @@ func executeCommandInJail(jail *Jail, cmdline string) (string, error) {
 		// else
 		word = word + string(c)
 	}
+	
+	if gDebug {
+		fmt.Printf("DEBUG: executeCommandInJail: prepare to execute \"%s\"\n", cmd)
+	}
 
 	out, err := exec.Command(cmd[0], cmd[1:]...).CombinedOutput()
 
@@ -702,6 +780,33 @@ func copyDevfsRuleset(ruleset int, srcrs int) error {
 	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
+}
+
 /********************************************************************************
  * Returns value of parameter as read in /var/run/jail.$InternalName.conf
  * Directives without value will return "true" if found
@@ -730,32 +835,6 @@ func getValueFromRunningConfig(jname string, param string) (string, error) {
 	
 	return "", fmt.Errorf("Parameter not found: %s", param)
 }
-/********************************************************************************
- * 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
-}
 
 
 /******************************************************************************