add xattr index query interfaces

examples/xattridx/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/versity/scoutfs-go"
+)
+
+func main() {
+	// flags mount path name
+	mountPath := flag.String("mount", "", "mount path name")
+	// flags index type uint64
+	indexType := flag.Uint64("type", 0, "index type")
+	// flags index start uint64
+	indexStart := flag.Uint64("start", 0, "index start")
+	// flags index end uint64
+	indexEnd := flag.Uint64("end", 0, "index end")
+	// flags show filenames
+	resolveNames := flag.Bool("resolve", false, "show filenames")
+
+	flag.Parse()
+
+	f, err := os.Open(*mountPath)
+	if err != nil {
+		log.Fatalf("Error opening mount: %s", err)
+	}
+	defer f.Close()
+
+	idx := scoutfs.NewIndexSearch(f, *indexType, *indexStart, *indexEnd)
+	for {
+		ents, err := idx.Next()
+		if err != nil {
+			log.Fatalf("Error reading index: %v", err)
+		}
+		if ents == nil {
+			break
+		}
+
+		for _, e := range ents {
+			if *resolveNames {
+				name, err := scoutfs.InoToPath(f, e.Inode)
+				if err != nil {
+					log.Fatalf("Error resolving name for %v: %V", e.Inode, err)
+					continue
+				}
+				fmt.Println(name)
+				continue
+			}
+			fmt.Println(e.Inode, "=", e.Value)
+		}
+	}
+}