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// +build darwin
// Package fusefrontend interfaces directly with the go-fuse library.
package fusefrontend
import (
"path/filepath"
"github.com/pkg/xattr"
"github.com/hanwen/go-fuse/fuse"
"github.com/rfjakob/gocryptfs/internal/tlog"
)
func disallowedXAttrName(attr string) bool {
return false
}
// On Darwin it is needed to unset XATTR_NOSECURITY 0x0008
func filterXattrSetFlags(flags int) int {
return flags &^ xattr.XATTR_NOSECURITY
}
// This function is NOT symlink-safe because Darwin lacks
// both fgetxattr() and /proc/self/fd.
func (fs *FS) getXattr(relPath string, cAttr string, context *fuse.Context) ([]byte, fuse.Status) {
cPath, err := fs.getBackingPath(relPath)
if err != nil {
return nil, fuse.ToStatus(err)
}
cData, err := xattr.LGet(cPath, cAttr)
if err != nil {
return nil, unpackXattrErr(err)
}
return cData, fuse.OK
}
// This function is NOT symlink-safe because Darwin lacks
// both fsetxattr() and /proc/self/fd.
func (fs *FS) setXattr(relPath string, cAttr string, cData []byte, flags int, context *fuse.Context) fuse.Status {
cPath, err := fs.getBackingPath(relPath)
if err != nil {
return fuse.ToStatus(err)
}
err = xattr.LSetWithFlags(cPath, cAttr, cData, flags)
return unpackXattrErr(err)
}
// This function is NOT symlink-safe because Darwin lacks
// both fremovexattr() and /proc/self/fd.
func (fs *FS) removeXAttr(relPath string, cAttr string, context *fuse.Context) fuse.Status {
cPath, err := fs.getBackingPath(relPath)
if err != nil {
return fuse.ToStatus(err)
}
err = xattr.LRemove(cPath, cAttr)
return unpackXattrErr(err)
}
// This function is NOT symlink-safe because Darwin lacks
// both flistxattr() and /proc/self/fd.
func (fs *FS) listXAttr(relPath string, context *fuse.Context) ([]string, fuse.Status) {
cPath, err := fs.getBackingPath(relPath)
if err != nil {
return nil, fuse.ToStatus(err)
}
cNames, err := xattr.LList(cPath)
if err != nil {
return nil, unpackXattrErr(err)
}
return cNames, fuse.OK
}
// getBackingPath - get the absolute encrypted path of the backing file
// from the relative plaintext path "relPath"
//
// This function is NOT symlink-safe. Darwin needs it because it lacks
// fgetxattr(2) and friends.
func (fs *FS) getBackingPath(relPath string) (string, error) {
cPath, err := fs.encryptPath(relPath)
if err != nil {
return "", err
}
cAbsPath := filepath.Join(fs.args.Cipherdir, cPath)
tlog.Debug.Printf("getBackingPath: %s + %s -> %s", fs.args.Cipherdir, relPath, cAbsPath)
return cAbsPath, nil
}
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