3 files changed, 15 insertions, 3 deletions
diff --git a/src/kernel/vfs/node.h b/src/kernel/vfs/node.h
index b0ade41..c3b1585 100644
--- a/src/kernel/vfs/node.h
+++ b/src/kernel/vfs/node.h
@@ -28,7 +28,7 @@ class node {
 	virtual size_t get_size() { return 0; }
 	virtual int link(node* other, int mode) { return E_NOT_IMPLEMENTED; }
 
-	// kind of like dynamic_cast'int these things
+	// kind of like dynamic_cast'ing these things
 	virtual display *as_display() { return 0; }
 	virtual vt *as_vt() { return 0; }
 };
diff --git a/src/kernel/vfs/vfile.cpp b/src/kernel/vfs/vfile.cpp
index ff57c9e..38ea291 100644
--- a/src/kernel/vfs/vfile.cpp
+++ b/src/kernel/vfs/vfile.cpp
@@ -12,7 +12,19 @@ vfile::~vfile() {
 	if (own_data) kfree(data);
 }
 
+int vfile::open(process *proc, int mode) {
+	if (mode & FM_TRUNC) {
+		if (own_data) kfree(data);
+		size = 0;
+		own_data = false;
+		data = 0;
+	}
+	return 0;
+}
+
 int vfile::read(size_t offset, size_t len, char* buffer) {
+	if (size == 0) return 0;
+
 	if (offset + len > size) len = size - offset;
 	memcpy(buffer, data + offset, len);
 	return len;
@@ -22,7 +34,7 @@ int vfile::write(size_t offset, size_t len, char* buffer) {
 	size_t new_size = MAX(offset + len, size);
 	if (!own_data || new_size > size) {
 		char* new_data = (char*)kmalloc(new_size);
-		memcpy(new_data, data, size);
+		if (size > 0) memcpy(new_data, data, size);
 		if (new_size > size) memset(new_data + size, 0, new_size - size);
 		if (own_data) kfree(data);
 		data = new_data;
diff --git a/src/kernel/vfs/vfile.h b/src/kernel/vfs/vfile.h
index 9b68b68..ffbccf9 100644
--- a/src/kernel/vfs/vfile.h
+++ b/src/kernel/vfs/vfile.h
@@ -13,7 +13,7 @@ class vfile : public node {
 	vfile(node* parent, char* data = 0, size_t size = 0);
 	virtual ~vfile();
 
-	// TODO: handle open(TRUNC)
+	virtual int open(process *proc, int mode);
 	virtual int read(size_t offset, size_t len, char* buffer);
 	virtual int write(size_t offset, size_t len, char* buffer);
 	virtual size_t get_size() { return size; }