misc file bugfixes

src/fs/devfs.c

@@ -44,7 +44,7 @@ static int devfs_open(dirnode_t* parent, char* name){
 
 }
 
-static int devfs_close() UNIMPLEMENTED
+static int devfs_close(){return 0;}
 static int devfs_mkdir() UNIMPLEMENTED
 static int devfs_create() UNIMPLEMENTED
 static int devfs_write() UNIMPLEMENTED

src/sys/syscalls/lseek.c

@@ -24,7 +24,7 @@ syscallret syscall_lseek(int ifd, off_t offset, int whence){
 		return retv;
 	}
 
-	int type = GETTYPE(fd->mode);
+	int type = GETTYPE(fd->node->st.st_mode);
 
 	if(type == TYPE_SOCKET || type == TYPE_FIFO){
 		retv.errno = ESPIPE;
@@ -34,6 +34,14 @@ syscallret syscall_lseek(int ifd, off_t offset, int whence){
 	off_t newoffset = fd->offset;
 	size_t fsize = fd->node->st.st_size;
 	
+	if(type == TYPE_CHARDEV || type == TYPE_BLOCKDEV){
+		int err = devman_isseekable(fd->node->st.st_rdev, &fsize);
+		if(err){
+			retv.errno = err;
+			goto _ret;
+		}
+	}
+
 	switch(whence){
 		case SEEK_SET:
 			if(offset < 0 || offset > fsize){

src/sys/syscalls/open.c

@@ -79,6 +79,7 @@ syscallret syscall_open(const char* pathname, int flags, mode_t mode){
 
 	
 	fd->node = file;
+	fd->mode = file->st.st_mode;
 
 	fd_release(fd);
 	

src/sys/syscalls/write.c

@@ -55,9 +55,6 @@ syscallret syscall_write(int ifd, void* buff, size_t count){
 
 	fd->offset += writec;
 	
-	if(fd->node->st.st_size < fd->offset)
-		fd->offset = fd->node->st.st_size;
-
 	retv.errno = 0;
 	retv.ret = writec;