lib: return -EBADE instead of -1

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

lib/criu.c

@@ -231,7 +231,7 @@ int criu_check(void)
 	if (ret)
 		goto exit;
 
-	ret = resp->success ? 0 : -1;
+	ret = resp->success ? 0 : -EBADE;
 
 exit:
 	if (resp)
@@ -263,7 +263,7 @@ int criu_dump(void)
 		else
 			ret = 0;
 	} else
-		ret = -1;
+		ret = -EBADE;
 
 exit:
 	if (resp)
@@ -292,7 +292,7 @@ int criu_restore(void)
 	if (resp->success)
 		ret = resp->restore->pid;
 	else
-		ret = -1;
+		ret = -EBADE;
 
 exit:
 	if (resp)

lib/criu.h

@@ -45,20 +45,20 @@ void criu_set_log_file(char *log_file);
  *
  * Return value  errno                Description
  * ----------------------------------------------------------------------------
- * 0             0                    Success.
+ * 0             undefined            Success.
  *
- * >0            0                    Success(criu_restore() only).
+ * >0            undefined            Success(criu_restore() only).
  *
- * -1            0                    RPC has returned fail.
+ * -BADE         rpc err  (0 for now) RPC has returned fail.
  *
- * -ECONNREFUSED from failed syscall  Unable to connect to CRIU.
+ * -ECONNREFUSED errno                Unable to connect to CRIU.
  *
- * -ECOMM        from failed syscall  Unable to send/recv msg to/from CRIU.
+ * -ECOMM        errno                Unable to send/recv msg to/from CRIU.
  *
- * -EINVAL       0                    CRIU doesn't support this type of request.
+ * -EINVAL       undefined            CRIU doesn't support this type of request.
  *                                    You should probably update CRIU.
  *
- * -EBADMSG      0                    Unexpected response from CRIU.
+ * -EBADMSG      undefined            Unexpected response from CRIU.
  *                                    You should probably update CRIU.
  */
 int criu_check(void);