91 lines
2.6 KiB
Go
91 lines
2.6 KiB
Go
// +build darwin
|
|
|
|
// Package fusefrontend interfaces directly with the go-fuse library.
|
|
package fusefrontend
|
|
|
|
import (
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/unix"
|
|
|
|
"github.com/hanwen/go-fuse/v2/fuse"
|
|
|
|
"github.com/rfjakob/gocryptfs/internal/syscallcompat"
|
|
)
|
|
|
|
// On Darwin it is needed to unset XATTR_NOSECURITY 0x0008
|
|
func filterXattrSetFlags(flags int) int {
|
|
// See https://opensource.apple.com/source/xnu/xnu-1504.15.3/bsd/sys/xattr.h.auto.html
|
|
const XATTR_NOSECURITY = 0x0008
|
|
|
|
return flags &^ XATTR_NOSECURITY
|
|
}
|
|
|
|
func (fs *FS) getXAttr(relPath string, cAttr string, context *fuse.Context) ([]byte, fuse.Status) {
|
|
// O_NONBLOCK to not block on FIFOs.
|
|
fd, err := fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_NONBLOCK)
|
|
if err != nil {
|
|
return nil, fuse.ToStatus(err)
|
|
}
|
|
defer syscall.Close(fd)
|
|
|
|
cData, err := syscallcompat.Fgetxattr(fd, cAttr)
|
|
if err != nil {
|
|
return nil, fuse.ToStatus(err)
|
|
}
|
|
|
|
return cData, fuse.OK
|
|
}
|
|
|
|
func (fs *FS) setXAttr(relPath string, cAttr string, cData []byte, flags int, context *fuse.Context) fuse.Status {
|
|
// O_NONBLOCK to not block on FIFOs.
|
|
fd, err := fs.openBackingFile(relPath, syscall.O_WRONLY|syscall.O_NONBLOCK)
|
|
// Directories cannot be opened read-write. Retry.
|
|
if err == syscall.EISDIR {
|
|
fd, err = fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK)
|
|
}
|
|
if err != nil {
|
|
return fuse.ToStatus(err)
|
|
}
|
|
defer syscall.Close(fd)
|
|
|
|
err = unix.Fsetxattr(fd, cAttr, cData, flags)
|
|
return fuse.ToStatus(err)
|
|
}
|
|
|
|
func (fs *FS) removeXAttr(relPath string, cAttr string, context *fuse.Context) fuse.Status {
|
|
// O_NONBLOCK to not block on FIFOs.
|
|
fd, err := fs.openBackingFile(relPath, syscall.O_WRONLY|syscall.O_NONBLOCK)
|
|
// Directories cannot be opened read-write. Retry.
|
|
if err == syscall.EISDIR {
|
|
fd, err = fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_DIRECTORY|syscall.O_NONBLOCK)
|
|
}
|
|
if err != nil {
|
|
return fuse.ToStatus(err)
|
|
}
|
|
defer syscall.Close(fd)
|
|
|
|
err = unix.Fremovexattr(fd, cAttr)
|
|
return fuse.ToStatus(err)
|
|
}
|
|
|
|
func (fs *FS) listXAttr(relPath string, context *fuse.Context) ([]string, fuse.Status) {
|
|
// O_NONBLOCK to not block on FIFOs.
|
|
fd, err := fs.openBackingFile(relPath, syscall.O_RDONLY|syscall.O_NONBLOCK)
|
|
// On a symlink, openBackingFile fails with ELOOP. Let's pretend there
|
|
// can be no xattrs on symlinks, and always return an empty result.
|
|
if err == syscall.ELOOP {
|
|
return nil, fuse.OK
|
|
}
|
|
if err != nil {
|
|
return nil, fuse.ToStatus(err)
|
|
}
|
|
defer syscall.Close(fd)
|
|
|
|
cNames, err := syscallcompat.Flistxattr(fd)
|
|
if err != nil {
|
|
return nil, fuse.ToStatus(err)
|
|
}
|
|
return cNames, fuse.OK
|
|
}
|