authfs: rewrite with Harvey-OS/ninep, implement Rattachharveyos

1 files changed, 51 insertions, 0 deletions

diff --git a/back/cmd/authfs/userdir.go b/back/cmd/authfs/userdir.go
new file mode 100644
index 0000000..f7ef5a7
--- /dev/null
+++ b/back/cmd/authfs/userdir.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+	"os"
+
+	p9 "github.com/Harvey-OS/ninep/protocol"
+
+	"git.samanthony.xyz/buth/back/qver"
+)
+
+type UsersDir struct {
+	path string
+	*qver.Version
+}
+
+func NewUsersDir(path string, rootVer *qver.Version) (*UsersDir, error) {
+	info, err := os.Stat(path)
+	if errors.Is(err, fs.ErrNotExist) {
+		if err := os.Mkdir(path, 0770); err != nil {
+			return nil, err
+		}
+	} else if err != nil {
+		return nil, err
+	} else if !info.IsDir() {
+		return nil, fmt.Errorf("%q is not a directory", path)
+	}
+
+	return &UsersDir{
+		path,
+		qver.New(qver.Parent(rootVer)),
+	}, nil
+}
+
+func (dir *UsersDir) Close() {
+	dir.Version.Close()
+}
+
+func (dir *UsersDir) Qid() (p9.QID, error) {
+	ver, err := dir.Version.Get()
+	if err != nil {
+		return p9.QID{}, err
+	}
+	return p9.QID{
+		Type:    p9.QTDIR,
+		Version: ver,
+		Path:    usersQidPath,
+	}, nil
+}