diff options
Diffstat (limited to 'vendor/github.com/containerd/continuity/fs/copy_linux.go')
-rw-r--r-- | vendor/github.com/containerd/continuity/fs/copy_linux.go | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/vendor/github.com/containerd/continuity/fs/copy_linux.go b/vendor/github.com/containerd/continuity/fs/copy_linux.go deleted file mode 100644 index 72bae7d4e..000000000 --- a/vendor/github.com/containerd/continuity/fs/copy_linux.go +++ /dev/null @@ -1,147 +0,0 @@ -/* - 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 := []unix.Timespec{ - unix.NsecToTimespec(syscall.TimespecToNsec(StatAtime(st))), - unix.NsecToTimespec(syscall.TimespecToNsec(StatMtime(st))), - } - if err := unix.UtimesNanoAt(unix.AT_FDCWD, name, timespec, unix.AT_SYMLINK_NOFOLLOW); err != nil { - return errors.Wrapf(err, "failed to utime %s", name) - } - - return nil -} - -const maxSSizeT = int64(^uint(0) >> 1) - -func copyFileContent(dst, src *os.File) error { - st, err := src.Stat() - if err != nil { - return errors.Wrap(err, "unable to stat source") - } - - size := st.Size() - first := true - srcFd := int(src.Fd()) - dstFd := int(dst.Fd()) - - for size > 0 { - // Ensure that we are never trying to copy more than SSIZE_MAX at a - // time and at the same time avoids overflows when the file is larger - // than 4GB on 32-bit systems. - var copySize int - if size > maxSSizeT { - copySize = int(maxSSizeT) - } else { - copySize = int(size) - } - n, err := unix.CopyFileRange(srcFd, nil, dstFd, nil, copySize, 0) - if err != nil { - if (err != unix.ENOSYS && err != unix.EXDEV) || !first { - return errors.Wrap(err, "copy file range failed") - } - - buf := bufferPool.Get().(*[]byte) - _, err = io.CopyBuffer(dst, src, *buf) - bufferPool.Put(buf) - return errors.Wrap(err, "userspace copy failed") - } - - first = false - size -= int64(n) - } - - return nil -} - -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)) -} |