set mount point to existing permissions

fix https://github.com/chrislusf/seaweedfs/issues/806

weed/command/mount_std.go

@@ -4,7 +4,10 @@ package command
 
 import (
 	"fmt"
+	"os"
+	"os/user"
 	"runtime"
+	"strconv"
 	"strings"
 	"time"
 
@@ -28,6 +31,24 @@ func runMount(cmd *Command, args []string) bool {
 
 	fuse.Unmount(*mountOptions.dir)
 
+	// detect mount folder mode
+	mountMode := os.ModeDir | 0755
+	if fileInfo, err := os.Stat(*mountOptions.dir); err == nil {
+		mountMode = os.ModeDir | fileInfo.Mode()
+		println(*mountOptions.dir, "mount mode", mountMode)
+	}
+
+	// detect current user
+	uid, gid := uint32(0), uint32(0)
+	if u, err := user.Current(); err == nil {
+		if parsedId, pe := strconv.ParseUint(u.Uid, 10, 32); pe == nil {
+			uid = uint32(parsedId)
+		}
+		if parsedId, pe := strconv.ParseUint(u.Gid, 10, 32); pe == nil {
+			gid = uint32(parsedId)
+		}
+	}
+
 	util.SetupProfiling(*mountCpuProfile, *mountMemProfile)
 
 	c, err := fuse.Mount(
@@ -77,6 +98,9 @@ func runMount(cmd *Command, args []string) bool {
 		DataCenter:         *mountOptions.dataCenter,
 		DirListingLimit:    *mountOptions.dirListingLimit,
 		EntryCacheTtl:      3 * time.Second,
+		MountUid:           uid,
+		MountGid:           gid,
+		MountMode:          mountMode,
 	}))
 	if err != nil {
 		fuse.Unmount(*mountOptions.dir)

weed/filesys/dir.go

@@ -34,8 +34,10 @@ func (dir *Dir) Attr(context context.Context, attr *fuse.Attr) error {
 	// https://github.com/bazil/fuse/issues/196
 	attr.Valid = time.Second
 
-	if dir.Path == "/" {
+	if dir.Path == dir.wfs.option.FilerMountRootPath {
-		attr.Mode = os.ModeDir | 0777
+		attr.Uid = dir.wfs.option.MountUid
+		attr.Gid = dir.wfs.option.MountGid
+		attr.Mode = dir.wfs.option.MountMode
 		return nil
 	}
 

weed/filesys/wfs.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"math"
+	"os"
 	"sync"
 	"time"
 
@@ -26,6 +27,10 @@ type Option struct {
 	DataCenter         string
 	DirListingLimit    int
 	EntryCacheTtl      time.Duration
+
+	MountUid  uint32
+	MountGid  uint32
+	MountMode os.FileMode
 }
 
 var _ = fs.FS(&WFS{})