114 lines
2.6 KiB
Go
114 lines
2.6 KiB
Go
//go:build !openbsd && !plan9
|
|
|
|
package local
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"github.com/pkg/xattr"
|
|
"github.com/rclone/rclone/fs"
|
|
)
|
|
|
|
const (
|
|
xattrPrefix = "user." // FIXME is this correct for all unixes?
|
|
xattrSupported = xattr.XATTR_SUPPORTED
|
|
)
|
|
|
|
// Check to see if the error supplied is a not supported error, and if
|
|
// so, disable xattrs
|
|
func (f *Fs) xattrIsNotSupported(err error) bool {
|
|
xattrErr, ok := err.(*xattr.Error)
|
|
if !ok {
|
|
return false
|
|
}
|
|
// Xattrs not supported can be ENOTSUP or ENOATTR or EINVAL (on Solaris)
|
|
if xattrErr.Err == syscall.EINVAL || xattrErr.Err == syscall.ENOTSUP || xattrErr.Err == xattr.ENOATTR {
|
|
// Show xattrs not supported
|
|
if f.xattrSupported.CompareAndSwap(1, 0) {
|
|
fs.Errorf(f, "xattrs not supported - disabling: %v", err)
|
|
}
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// getXattr returns the extended attributes for an object
|
|
//
|
|
// It doesn't return any attributes owned by this backend in
|
|
// metadataKeys
|
|
func (o *Object) getXattr() (metadata fs.Metadata, err error) {
|
|
if !xattrSupported || o.fs.xattrSupported.Load() == 0 {
|
|
return nil, nil
|
|
}
|
|
var list []string
|
|
if o.fs.opt.FollowSymlinks {
|
|
list, err = xattr.List(o.path)
|
|
} else {
|
|
list, err = xattr.LList(o.path)
|
|
}
|
|
if err != nil {
|
|
if o.fs.xattrIsNotSupported(err) {
|
|
return nil, nil
|
|
}
|
|
return nil, fmt.Errorf("failed to read xattr: %w", err)
|
|
}
|
|
if len(list) == 0 {
|
|
return nil, nil
|
|
}
|
|
metadata = make(fs.Metadata, len(list))
|
|
for _, k := range list {
|
|
var v []byte
|
|
if o.fs.opt.FollowSymlinks {
|
|
v, err = xattr.Get(o.path, k)
|
|
} else {
|
|
v, err = xattr.LGet(o.path, k)
|
|
}
|
|
if err != nil {
|
|
if o.fs.xattrIsNotSupported(err) {
|
|
return nil, nil
|
|
}
|
|
return nil, fmt.Errorf("failed to read xattr key %q: %w", k, err)
|
|
}
|
|
k = strings.ToLower(k)
|
|
if !strings.HasPrefix(k, xattrPrefix) {
|
|
continue
|
|
}
|
|
k = k[len(xattrPrefix):]
|
|
if _, found := systemMetadataInfo[k]; found {
|
|
continue
|
|
}
|
|
metadata[k] = string(v)
|
|
}
|
|
return metadata, nil
|
|
}
|
|
|
|
// setXattr sets the metadata on the file Xattrs
|
|
//
|
|
// It doesn't set any attributes owned by this backend in metadataKeys
|
|
func (o *Object) setXattr(metadata fs.Metadata) (err error) {
|
|
if !xattrSupported || o.fs.xattrSupported.Load() == 0 {
|
|
return nil
|
|
}
|
|
for k, value := range metadata {
|
|
k = strings.ToLower(k)
|
|
if _, found := systemMetadataInfo[k]; found {
|
|
continue
|
|
}
|
|
k = xattrPrefix + k
|
|
v := []byte(value)
|
|
if o.fs.opt.FollowSymlinks {
|
|
err = xattr.Set(o.path, k, v)
|
|
} else {
|
|
err = xattr.LSet(o.path, k, v)
|
|
}
|
|
if err != nil {
|
|
if o.fs.xattrIsNotSupported(err) {
|
|
return nil
|
|
}
|
|
return fmt.Errorf("failed to set xattr key %q: %w", k, err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|