handle removal of the serialdevice

yeokm1 · Sep 11, 2018 · db7a3b7 · db7a3b7
1 parent 1b9591e
commit db7a3b7
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/Sources/SwiftSerial.swift b/Sources/SwiftSerial.swift
@@ -210,6 +210,7 @@ public enum PortError: Int32, Error {
     case mustBeOpen
     case stringsMustBeUTF8
     case unableToConvertByteToCharacter
+    case deviceNotConnected
 }
 
 public class SerialPort {
@@ -371,7 +372,13 @@ extension SerialPort {
         guard let fileDescriptor = fileDescriptor else {
             throw PortError.mustBeOpen
         }
-
+
+        var s: stat = stat()
+        fstat(fileDescriptor, &s)
+        if s.st_nlink != 1 {
+            throw PortError.deviceNotConnected
+        }
+
         let bytesRead = read(fileDescriptor, buffer, size)
         return bytesRead
     }