diff --git a/fs/fs.c b/fs/fs.c
index 61f56e99..49465a16 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -162,4 +162,3 @@ vfs_node_t* findnode_fs(const char* name)
 
 	return ret;
 }
-
diff --git a/include/metalsvm/fs.h b/include/metalsvm/fs.h
index 4f4f5895..6f0dc887 100644
--- a/include/metalsvm/fs.h
+++ b/include/metalsvm/fs.h
@@ -37,19 +37,21 @@
 //#define FS_SYMLINK     0x06
 //#define FS_MOUNTPOINT  0x08	// Is the file an active mountpoint?
 
+
 /*open flags*/
-#define O_RDONLY 	0
-#define O_WRONLY 	1
-#define O_RDWR 		2
+
+//#define O_RDONLY 	0
+//#define O_WRONLY 	1
+//#define O_RDWR	2
 
 #define O_CREAT 	64
-#define O_EXCL 		128
-#define O_NOCTTY 	256
-#define O_TRUNC 	512
+#define O_EXCL 	128
+//#define O_NOCTTY 	256
+//#define O_TRUNC 	512
 #define O_APPEND 	1024
-#define O_NDELAY 	2048
-#define O_SYNC 		4096
-#define O_ASYNC 	8192
+//#define O_NDELAY 	2048
+//#define O_SYNC	4096
+//#define O_ASYNC 	8192
 
 /*lseek defines*/
 #ifndef SEEK_SET
diff --git a/include/metalsvm/fs_types.h b/include/metalsvm/fs_types.h
index 7f2d75be..da4e4b64 100644
--- a/include/metalsvm/fs_types.h
+++ b/include/metalsvm/fs_types.h
@@ -30,6 +30,7 @@ extern "C" {
 typedef struct fildes {
         vfs_node_t* 	node;		/*  */
         off_t 		offset;		/*  */
+	int 		flags;		/*  */
 	int 		mode;		/*  */
 } fildes_t;
 
diff --git a/kernel/syscall.c b/kernel/syscall.c
index 31086347..ba1769dd 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -26,9 +26,14 @@
 #include <metalsvm/spinlock.h>
 #include <metalsvm/time.h>
 
+
 static int sys_write(int fd, const char *buf, size_t len)
 {
 	unsigned int wrotebytes;
+	if (per_core(current_task)->fildes_table[fd].flags & O_APPEND) {
+		per_core(current_task)->fildes_table[fd].offset = per_core(current_task)->fildes_table[fd].node->block_size;
+	}
+
 	wrotebytes = write_fs(per_core(current_task)->fildes_table[fd].node, (uint8_t*)buf, len, per_core(current_task)->fildes_table[fd].offset);
 	//kprintf("writing into filesystem -- fd:%i, Filelength:%i, Writtenbytes: %i, Bufferlength: %s \n", fd, len, wrotebytes, buf);
 	per_core(current_task)->fildes_table[fd].offset += wrotebytes;
@@ -39,16 +44,30 @@ static int sys_write(int fd, const char *buf, size_t len)
 static int sys_open(const char* file, int flags, int mode)
 {
 	int fd;
+	if (!findnode_fs((char*) file)) {
+		if (flags & O_CREAT) {
+			//create file, not implemented yet
+		}
+		return -EINVAL;
+	} else {
+		if ((flags & O_CREAT) && (flags & O_EXCL));
+			return -EINVAL;
+	}
+
 	for (fd = 3; fd < NR_OPEN; fd++) {
 		if (per_core(current_task)->fildes_table[fd].node == NULL) {
 			per_core(current_task)->fildes_table[fd].node = findnode_fs((char*) file);
-			return fd;
+			per_core(current_task)->fildes_table[fd].mode = mode;
+			per_core(current_task)->fildes_table[fd].flags = flags;
 		} 
  	}
 	if (fd >= NR_OPEN) {
 		kprintf("Unable to create filedescriptor");
 		return -EINVAL;
 	}   
+	
+	return fd;
+
 }
 
 static int sys_close(int fd)
@@ -77,7 +96,8 @@ static int sys_lseek(int fd, off_t pos, int origin)
 {
 	int ret = -EINVAL;
 
-	if (BUILTIN_EXPECT(per_core(current_task)->fildes_table[fd].node->type != FS_FILE, 0))
+	if (BUILTIN_EXPECT(per_core(current_task)->fildes_table[fd].node->type != FS_FILE
+			&& per_core(current_task)->fildes_table[fd].node->type != FS_CHARDEVICE, 0));
 		return -EINVAL;
 
 	switch(origin)