kernel: add more status codes

include/socks/status.h

@@ -12,6 +12,7 @@ typedef unsigned int kern_status_t;
 #define KERN_NO_ENTRY         (6)
 #define KERN_WOULD_BLOCK      (7)
 #define KERN_BUSY             (8)
+#define KERN_NO_DEVICE        (9)
 
 extern const char *kern_status_string(kern_status_t status);
 

kernel/status.c

@@ -1,22 +1,22 @@
 #include <socks/status.h>
 
+#define ERROR_STRING_CASE(code) \
+	case code: \
+	return #code
+
 const char *kern_status_string(kern_status_t status)
 {
 	switch (status) {
-	case KERN_OK:
+		ERROR_STRING_CASE(KERN_OK);
-		return "KERN_OK";
+		ERROR_STRING_CASE(KERN_UNIMPLEMENTED);
-	case KERN_UNIMPLEMENTED:
+		ERROR_STRING_CASE(KERN_NAME_EXISTS);
-		return "KERN_UNIMPLEMENTED";
+		ERROR_STRING_CASE(KERN_INVALID_ARGUMENT);
-	case KERN_NAME_EXISTS:
+		ERROR_STRING_CASE(KERN_UNSUPPORTED);
-		return "KERN_NAME_EXISTS";
+		ERROR_STRING_CASE(KERN_NO_MEMORY);
-	case KERN_INVALID_ARGUMENT:
+		ERROR_STRING_CASE(KERN_NO_ENTRY);
-		return "KERN_INVALID_ARGUMENT";
+		ERROR_STRING_CASE(KERN_WOULD_BLOCK);
-	case KERN_UNSUPPORTED:
+		ERROR_STRING_CASE(KERN_BUSY);
-		return "KERN_UNSUPPORTED";
+		ERROR_STRING_CASE(KERN_NO_DEVICE);
-	case KERN_NO_MEMORY:
-		return "KERN_NO_MEMORY";
-	case KERN_NO_ENTRY:
-		return "KERN_NO_ENTRY";
 	default:
 		return "UNKNOWN";
 	}