diff --git a/appvm/dvm_file_editor.c b/appvm/dvm_file_editor.c
index 3cc8818..4eed30b 100644
--- a/appvm/dvm_file_editor.c
+++ b/appvm/dvm_file_editor.c
@@ -21,27 +21,6 @@ char *get_filename()
 	return retname;
 }
 
-int copy_fd_all(int fdout, int fdin)
-{
-	int ret;
-	char buf[4096];
-	for (;;) {
-		ret = read(fdin, buf, sizeof(buf));
-		if (!ret)
-			break;
-		if (ret < 0) {
-			perror("read");
-			return 0;
-		}
-		if (!write_all(fdout, buf, ret)) {
-			perror("write");
-			return 0;
-		}
-	}
-	return 1;
-}
-
-
 void copy_file(char *filename)
 {
 	int fd = open(filename, O_WRONLY | O_CREAT, 0600);
diff --git a/common/ioall.c b/common/ioall.c
index ce550c7..1fca6f1 100644
--- a/common/ioall.c
+++ b/common/ioall.c
@@ -59,3 +59,24 @@ int read_all(int fd, void *buf, int size)
 //      fprintf(stderr, "read %d bytes\n", size);
 	return 1;
 }
+
+int copy_fd_all(int fdout, int fdin)
+{
+	int ret;
+	char buf[4096];
+	for (;;) {
+		ret = read(fdin, buf, sizeof(buf));
+		if (!ret)
+			break;
+		if (ret < 0) {
+			perror("read");
+			return 0;
+		}
+		if (!write_all(fdout, buf, ret)) {
+			perror("write");
+			return 0;
+		}
+	}
+	return 1;
+}
+
diff --git a/common/ioall.h b/common/ioall.h
index 1e76353..1a700c6 100644
--- a/common/ioall.h
+++ b/common/ioall.h
@@ -1,2 +1,3 @@
 int write_all(int fd, void *buf, int size);
 int read_all(int fd, void *buf, int size);
+int copy_fd_all(int fdout, int fdin);