Add permission denied command run classification

app/classes/logical/ExecutionResult.js

@@ -22,7 +22,7 @@ class ExecutionResult extends Injectable {
     }
 
     get clean_err() {
-        return this.stdout.filter(Boolean)
+        return this.stderr.filter(Boolean)
     }
 }
 

app/classes/logical/error/PermissionDeniedError.js

@@ -0,0 +1,5 @@
+class PermissionDeniedError extends Error {
+
+}
+
+module.exports = exports = PermissionDeniedError

app/classes/metal/Host.js

@@ -1,5 +1,6 @@
 const { Injectable } = require('flitter-di')
 const ImplementationError = require('libflitter/errors/ImplementationError')
+const PermissionDeniedError = require('../logical/error/PermissionDeniedError')
 const uuid = require('uuid/v4')
 const UniversalPath = require('../logical/UniversalPath')
 const SystemMetrics = require('../logical/SystemMetrics')
@@ -178,7 +179,8 @@ class Host extends Injectable {
     async run_line_result(command) {
         const result = await this.execute(command)
         if ( result.exit_code !== 0 || result.clean_out.length < 1 ) {
-            throw new Error('Unable to get line output from command: '+command)
+            const E = this._get_result_error_class(result)
+            throw new E('Unable to get line output from command: '+command)
         }
         return this.utility.infer(result.clean_out[0].trim())
     }
@@ -186,7 +188,8 @@ class Host extends Injectable {
     async run(command) {
         const result = await this.execute(command)
         if ( result.exit_code !== 0 ) {
-            throw new Error('Unable to run command: '+command)
+            const E = this._get_result_error_class(result)
+            throw new E('Unable to run command: '+command)
         }
         return result
     }
@@ -200,6 +203,22 @@ class Host extends Injectable {
     async reboot() {
         await this.run_line_result(this._reboot_command)
     }
+
+    _get_result_error_class(result) {
+        const both = `${result.clean_out}\n${result.clean_err}`.toLowerCase()
+        const access_denied_phrases = [
+            'not permitted',
+            'access denied',
+            'insufficient permission',
+            'permission denied'
+        ]
+
+        for ( const phrase of access_denied_phrases ) {
+            if ( both.includes(phrase) ) return PermissionDeniedError
+        }
+
+        return Error
+    }
 }
 
 module.exports = exports = Host