1 files changed, 122 insertions, 0 deletions
diff --git a/src/kernel/vfs/node.cpp b/src/kernel/vfs/node.cpp
new file mode 100644
index 0000000..9900a3c
--- /dev/null
+++ b/src/kernel/vfs/node.cpp
@@ -0,0 +1,122 @@
+#include "node.h"
+#include "vdir.h"
+#include <core/monitor.h>
+
+int node::open(process *proc, int mode) {
+	//TODO : permission checks
+	return 0;	// ok
+}
+
+int node::stat(file_info *info) {
+	info->type = type;
+	info->dev_type = dev_type;
+	info->mode = mode;
+	info->uid = uid;
+	info->gid = gid;
+	info->size = this->get_size();
+	return 0;
+}
+
+node *root = 0;
+
+void vfs_setup() {
+	root = new vdir(0);
+	root->add_child(".dev", new vdir(root));
+
+	monitor_write("[VFS] ");
+}
+
+node* vfs_find(node* root, char* path) {
+	node* el = root;
+	char *member = path;
+	
+	while (*path != 0 && el != 0) {
+		if (*path == '/') {
+			if (member == path) {
+				member++;
+				path++;
+			} else {
+				*path = 0;
+				el = el->get_child(member);
+				path++;
+				member = path;
+			}
+		} else {
+			path++;
+		}
+	}
+	if (el != 0 && member != path) {
+		el = el->get_child(member);
+	}
+
+	return el;
+}
+
+node* vfs_read_fd(FILE d) {
+	return current_process->fd.at(d);
+}
+
+// Syscalls
+
+static FILE i_open(node* r, char* filename, int mode) {
+	node* f = vfs_find(r, filename);
+	if (f == 0) return E_NOT_FOUND;
+	//TODO : different actions depending on open mode
+	int e = f->open(current_process, mode);
+	if (e != 0) return e;
+	return current_process->fd.add(f);
+}
+
+FILE open(char* filename, int mode) {
+	return i_open(root, filename, mode);
+}
+
+FILE open_relative(FILE root, char* filename, int mode) {
+	node* n = vfs_read_fd(root);
+	if (n == 0) return E_INVALID_FD;
+	return i_open(n, filename, mode);
+}
+
+int stat(char* filename, file_info *info) {
+	node *f = vfs_find(root, filename);
+	if (f == 0) return E_NOT_FOUND;
+	return f->stat(info);
+}
+
+int stat_relative(FILE root, char* filename, file_info *info) {
+	node *r = vfs_read_fd(root);
+	if (r == 0) return E_INVALID_FD;
+	node *f = vfs_find(r, filename);
+	if (f == 0) return E_NOT_FOUND;
+	return f->stat(info);
+}
+
+int statf(FILE file, file_info *info) {
+	node *f = vfs_read_fd(file);
+	if (f == 0) return E_INVALID_FD;
+	return f->stat(info);
+}
+
+void close(FILE file) {
+	node *f = vfs_read_fd(file);
+	if (f != 0) {
+		f->close(current_process);
+		current_process->fd.set(file, 0);
+	}
+}
+
+int read(FILE file, size_t offset, size_t len, char* buffer) {
+	node *f = vfs_read_fd(file);
+	if (f == 0) return E_INVALID_FD;
+	return f->read(offset, len, buffer);
+}
+
+int write(FILE file, size_t offset, size_t len, char* buffer) {
+	node *f = vfs_read_fd(file);
+	if (f == 0) return E_INVALID_FD;
+	return f->write(offset, len, buffer);
+}
+
+int link(char* from, char* to, int mode) {
+	return E_NOT_IMPLEMENTED;
+}