Initial commit

ffs/dreamsdir.go

@@ -0,0 +1,115 @@
+package ffs
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"syscall"
+	"time"
+
+	"bazil.org/fuse"
+	"bazil.org/fuse/fs"
+)
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// CONSTANTS //////////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+const (
+	DREAMS_DIR_INODE_BASE = 0x2000
+	DREAMS_DIR_MAX_INODES = 0x1000
+)
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// TYPE: DreamsDir ////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+type DreamsDir struct {
+	_attr    fuse.Attr
+	_entries []fuse.Dirent
+}
+
+func NewDreamsDir(inodeBase uint64, rootUID, rootGID uint32) *DreamsDir {
+	now := time.Now()
+	dir := &DreamsDir{
+		_attr: fuse.Attr{
+			Inode: inodeBase,
+			Nlink: 1,
+			Mode:  os.ModeDir | 0500,
+			Uid:   rootUID,
+			Gid:   rootGID,
+			Atime: now,
+			Ctime: now,
+			Mtime: now,
+		},
+	}
+
+	// add basic entries
+	dir._entries = append(
+		dir._entries,
+		fuse.Dirent{Inode: dir._attr.Inode, Name: ".", Type: fuse.DT_Dir},
+		fuse.Dirent{Inode: ROOT_INODE, Name: "..", Type: fuse.DT_Dir},
+	)
+
+	return dir
+}
+
+func (d *DreamsDir) GetAttr() *fuse.Attr {
+	return &d._attr
+}
+
+func (d *DreamsDir) Attr(ctx context.Context, a *fuse.Attr) error {
+	*a = d._attr
+	return nil
+}
+
+func (d *DreamsDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
+	pounce := G_FS._pounce
+	dreams := pounce.Dreams
+	items := make([]fuse.Dirent, len(dreams)+2)
+
+	items[0] = fuse.Dirent{Inode: d._attr.Inode, Name: ".", Type: fuse.DT_Dir}
+	items[1] = fuse.Dirent{Inode: ROOT_INODE, Name: "..", Type: fuse.DT_Dir}
+
+	i := 2
+	for shortURL := range dreams {
+		items[i] = fuse.Dirent{
+			Inode: uint64(2000 + i),
+			Name:  shortURL,
+			Type:  fuse.DT_File,
+		}
+		i++
+	}
+
+	return items, nil
+}
+
+func (d *DreamsDir) Lookup(ctx context.Context, name string) (fs.Node, error) {
+	if name == "." {
+		return d, nil
+	}
+
+	dreams := G_FS._pounce.Dreams
+	dream, exists := dreams[name]
+	if !exists {
+		fmt.Printf("[D] DreamsDir().Lookup('%v'): ENOENT\n", name)
+		return nil, syscall.ENOENT
+	}
+
+	fmt.Printf("[D] DreamsDir().Lookup('%v'): OK\n", name)
+	now := time.Now()
+	return &DreamFile{
+		Dream: dream,
+		_attr: fuse.Attr{
+			Inode: 0,
+			Nlink: 1,
+			Mode:  0400,
+			Size:  0,
+			Ctime: now,
+			Atime: now,
+			Mtime: now,
+			Uid:   d._attr.Uid,
+			Gid:   d._attr.Gid,
+		},
+	}, nil
+}