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package frontend
import (
"fmt"
"os"
"time"
"syscall"
"io/ioutil"
"path"
"golang.org/x/net/context"
//"github.com/rfjakob/gocryptfs/cryptfs"
"bazil.org/fuse"
"bazil.org/fuse/fs"
)
type Node struct {
fs.NodeRef
backing string
parentFS *FS
}
// FileModeFromStat - create os.FileMode from stat value
// For some reason, they use different constants.
// Adapted from https://golang.org/src/os/stat_linux.go
func FileModeFromStat(st *syscall.Stat_t) os.FileMode {
fileMode := os.FileMode(st.Mode & 0777)
switch st.Mode & syscall.S_IFMT {
case syscall.S_IFBLK:
fileMode |= os.ModeDevice
case syscall.S_IFCHR:
fileMode |= os.ModeDevice | os.ModeCharDevice
case syscall.S_IFDIR:
fileMode |= os.ModeDir
case syscall.S_IFIFO:
fileMode |= os.ModeNamedPipe
case syscall.S_IFLNK:
fileMode |= os.ModeSymlink
case syscall.S_IFREG:
// nothing to do
case syscall.S_IFSOCK:
fileMode |= os.ModeSocket
}
if st.Mode & syscall.S_ISGID != 0 {
fileMode |= os.ModeSetgid
}
if st.Mode & syscall.S_ISUID != 0 {
fileMode |= os.ModeSetuid
}
if st.Mode & syscall.S_ISVTX != 0 {
fileMode |= os.ModeSticky
}
return fileMode
}
func StatToAttr(s *syscall.Stat_t, a *fuse.Attr) {
a.Inode = s.Ino
a.Size = uint64(s.Size)
a.Blocks = uint64(s.Blocks)
a.Atime = time.Unix(s.Atim.Sec, s.Atim.Nsec)
a.Mtime = time.Unix(s.Mtim.Sec, s.Mtim.Nsec)
a.Ctime = time.Unix(s.Ctim.Sec, s.Ctim.Nsec)
a.Mode = FileModeFromStat(s)
a.Nlink = uint32(s.Nlink)
a.Uid = uint32(s.Uid)
a.Gid = uint32(s.Gid)
a.Rdev = uint32(s.Rdev)
}
func (n Node) Attr(ctx context.Context, attr *fuse.Attr) error {
var err error
var st syscall.Stat_t
if n.backing == "" {
// When GetAttr is called for the toplevel directory, we always want
// to look through symlinks.
fmt.Printf("Attr %s\n", n.parentFS.backing)
//err = syscall.Stat(n.parentFS.backing, &st)
err = syscall.Stat("/", &st)
} else {
fmt.Printf("Attr %s\n", path.Join(n.parentFS.backing, n.backing))
p := path.Join(n.parentFS.backing, n.backing)
err = syscall.Lstat(p, &st)
}
if err != nil {
return err
}
StatToAttr(&st, attr)
return nil
}
func (n *Node) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
entries, err := ioutil.ReadDir(n.backing)
if err != nil {
return nil, err
}
var fuseEntries []fuse.Dirent
for _, e := range entries {
var d fuse.Dirent
d.Name = e.Name()
fuseEntries = append(fuseEntries, d)
}
return fuseEntries, err
}
func (n *Node) Lookup(ctx context.Context, name string) (fs.Node, error) {
if name == "hello" {
return Node{}, nil
}
return nil, fuse.ENOENT
}
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