mirror of https://github.com/docker/cli.git
113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
// +build solaris darwin freebsd
|
|
|
|
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package fs
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
"syscall"
|
|
|
|
"github.com/containerd/continuity/sysx"
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func copyFileInfo(fi os.FileInfo, name string) error {
|
|
st := fi.Sys().(*syscall.Stat_t)
|
|
if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
|
|
if os.IsPermission(err) {
|
|
// Normally if uid/gid are the same this would be a no-op, but some
|
|
// filesystems may still return EPERM... for instance NFS does this.
|
|
// In such a case, this is not an error.
|
|
if dstStat, err2 := os.Lstat(name); err2 == nil {
|
|
st2 := dstStat.Sys().(*syscall.Stat_t)
|
|
if st.Uid == st2.Uid && st.Gid == st2.Gid {
|
|
err = nil
|
|
}
|
|
}
|
|
}
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to chown %s", name)
|
|
}
|
|
}
|
|
|
|
if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
|
|
if err := os.Chmod(name, fi.Mode()); err != nil {
|
|
return errors.Wrapf(err, "failed to chmod %s", name)
|
|
}
|
|
}
|
|
|
|
timespec := []syscall.Timespec{StatAtime(st), StatMtime(st)}
|
|
if err := syscall.UtimesNano(name, timespec); err != nil {
|
|
return errors.Wrapf(err, "failed to utime %s", name)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func copyFileContent(dst, src *os.File) error {
|
|
buf := bufferPool.Get().(*[]byte)
|
|
_, err := io.CopyBuffer(dst, src, *buf)
|
|
bufferPool.Put(buf)
|
|
|
|
return err
|
|
}
|
|
|
|
func copyXAttrs(dst, src string, xeh XAttrErrorHandler) error {
|
|
xattrKeys, err := sysx.LListxattr(src)
|
|
if err != nil {
|
|
e := errors.Wrapf(err, "failed to list xattrs on %s", src)
|
|
if xeh != nil {
|
|
e = xeh(dst, src, "", e)
|
|
}
|
|
return e
|
|
}
|
|
for _, xattr := range xattrKeys {
|
|
data, err := sysx.LGetxattr(src, xattr)
|
|
if err != nil {
|
|
e := errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
|
|
if xeh != nil {
|
|
if e = xeh(dst, src, xattr, e); e == nil {
|
|
continue
|
|
}
|
|
}
|
|
return e
|
|
}
|
|
if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
|
|
e := errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
|
|
if xeh != nil {
|
|
if e = xeh(dst, src, xattr, e); e == nil {
|
|
continue
|
|
}
|
|
}
|
|
return e
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func copyDevice(dst string, fi os.FileInfo) error {
|
|
st, ok := fi.Sys().(*syscall.Stat_t)
|
|
if !ok {
|
|
return errors.New("unsupported stat type")
|
|
}
|
|
return unix.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
|
|
}
|