diff --git a/src/hyper.h b/src/hyper.h
index c4ad759..561a514 100644
--- a/src/hyper.h
+++ b/src/hyper.h
@@ -54,7 +54,7 @@ struct hyper_win_size {
 	uint64_t	seq;
 };
 
-struct hyper_reader {
+struct file_command {
 	char		*id;
 	char		*file;
 };
diff --git a/src/init.c b/src/init.c
index 56bd8fd..fb3f152 100644
--- a/src/init.c
+++ b/src/init.c
@@ -805,7 +805,7 @@ err:
 
 static int hyper_cmd_read_file(char *json, int length, uint32_t *datalen, uint8_t **data)
 {
-	struct hyper_reader reader;
+	struct file_command cmd;
 	struct hyper_container *c;
 	struct hyper_pod *pod = &global_pod;
 	struct hyper_file_arg arg = {
@@ -818,13 +818,13 @@ static int hyper_cmd_read_file(char *json, int length, uint32_t *datalen, uint8_
 
 	fprintf(stdout, "%s\n", __func__);
 
-	if (hyper_parse_read_file(&reader, json, length) < 0) {
+	if (hyper_parse_file_command(&cmd, json, length) < 0) {
 		goto out;
 	}
 
-	c = hyper_find_container(pod, reader.id);
+	c = hyper_find_container(pod, cmd.id);
 	if (c == NULL) {
-		fprintf(stderr, "can not find container whose id is %s\n", reader.id);
+		fprintf(stderr, "can not find container whose id is %s\n", cmd.id);
 		goto out;
 	}
 
@@ -839,7 +839,7 @@ static int hyper_cmd_read_file(char *json, int length, uint32_t *datalen, uint8_
 		goto out;
 	}
 
-	arg.file = reader.file;
+	arg.file = cmd.file;
 	arg.datalen = datalen;
 	arg.data = data;
 
@@ -851,7 +851,7 @@ static int hyper_cmd_read_file(char *json, int length, uint32_t *datalen, uint8_
 
 	pid = clone(hyper_do_cmd_read_file, stack + stacksize, CLONE_VM| SIGQUIT, &arg);
 	if (pid < 0) {
-		perror("fail to fork writter process");
+		perror("fail to fork reader process");
 		goto out;
 	}
 
@@ -869,8 +869,8 @@ static int hyper_cmd_read_file(char *json, int length, uint32_t *datalen, uint8_
 out:
 	close(arg.pipe[0]);
 	close(arg.pipe[1]);
-	free(reader.id);
-	free(reader.file);
+	free(cmd.id);
+	free(cmd.file);
 	free(stack);
 
 	return ret;
diff --git a/src/parse.c b/src/parse.c
index 7b28ce8..f2e2a62 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -1406,7 +1406,7 @@ fail:
 	goto out;
 }
 
-int hyper_parse_read_file(struct hyper_reader *reader, char *json, int length)
+int hyper_parse_file_command(struct file_command *cmd, char *json, int length)
 {
 	int i, n, ret = -1;
 
@@ -1414,11 +1414,11 @@ int hyper_parse_read_file(struct hyper_reader *reader, char *json, int length)
 	int toks_num = 10;
 	jsmntok_t *toks = NULL;
 
-	memset(reader, 0, sizeof(*reader));
+	memset(cmd, 0, sizeof(*cmd));
 
 	toks = calloc(toks_num, sizeof(jsmntok_t));
 	if (toks == NULL) {
-		fprintf(stderr, "fail to allocate tokens for read file cmd\n");
+		fprintf(stderr, "fail to allocate tokens for file cmd\n");
 		ret = -1;
 		goto fail;
 	}
@@ -1441,20 +1441,20 @@ int hyper_parse_read_file(struct hyper_reader *reader, char *json, int length)
 			goto fail;
 
 		if (json_token_streq(json, t, "container")) {
-			reader->id = (json_token_str(json, &toks[i]));
-			fprintf(stdout, "readfile get container %s\n", reader->id);
+			cmd->id = (json_token_str(json, &toks[i]));
+			fprintf(stdout, "file cmd get container %s\n", cmd->id);
 		} else if (json_token_streq(json, t, "file")) {
-			reader->file = (json_token_str(json, &toks[i]));
-			fprintf(stdout, "readfile get file %s\n", reader->file);
+			cmd->file = (json_token_str(json, &toks[i]));
+			fprintf(stdout, "file cmd get file %s\n", cmd->file);
 		} else {
-			fprintf(stdout, "get unknown section %s in readfile\n",
+			fprintf(stdout, "get unknown section %s in file cmd\n",
 				json_token_str(json, t));
 			goto fail;
 		}
 	}
 
-	if (reader->id == NULL || reader->file == NULL) {
-		fprintf(stderr, "readfile format incorrect\n");
+	if (cmd->id == NULL || cmd->file == NULL) {
+		fprintf(stderr, "file cmd format incorrect\n");
 		goto fail;
 	}
 
@@ -1463,10 +1463,10 @@ out:
 	free(toks);
 	return ret;
 fail:
-	free(reader->id);
-	reader->id = NULL;
-	free(reader->file);
-	reader->file = NULL;
+	free(cmd->id);
+	cmd->id = NULL;
+	free(cmd->file);
+	cmd->file = NULL;
 	goto out;
 }
 
diff --git a/src/parse.h b/src/parse.h
index 5d9d232..345e5d5 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -11,7 +11,7 @@ char *json_token_str(char *js, jsmntok_t *t);
 int json_token_streq(char *js, jsmntok_t *t, char *s);
 int hyper_parse_winsize(struct hyper_win_size *ws, char *json, int length);
 int hyper_parse_write_file(struct hyper_writter *writter, char *json, int length);
-int hyper_parse_read_file(struct hyper_reader *reader, char *json, int length);
+int hyper_parse_file_command(struct file_command *cmd, char *json, int length);
 struct hyper_container *hyper_parse_new_container(struct hyper_pod *pod, char *json, int length);
 void hyper_free_container(struct hyper_container *c);
 struct hyper_interface *hyper_parse_setup_interface(char *json, int length);