mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
94a8c8b3c0
full diff: 3bbb99cdbd...0f039a052c
- tonistiigi/fsutil#66 copy: add fast copy path for darwin
- tonistiigi/fsutil#67 Treat Unix sockets as regular files
- relates to moby/buildkit#1144 Fix socket handling
- tonistiigi/fsutil#68 fix gocrypto commit
- tonistiigi/fsutil#69 receive: use filter on receive diff
- prevents incremental transfers with userns because the metadata
on disk is always different than the one being transferred.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
// +build darwin
|
|
|
|
package fs
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
"syscall"
|
|
"unsafe"
|
|
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// <sys/clonefile.h
|
|
// int clonefileat(int, const char *, int, const char *, uint32_t) __OSX_AVAILABLE(10.12) __IOS_AVAILABLE(10.0) __TVOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0);
|
|
|
|
const CLONE_NOFOLLOW = 0x0001 /* Don't follow symbolic links */
|
|
const CLONE_NOOWNERCOPY = 0x0002 /* Don't copy ownership information from */
|
|
|
|
func copyFile(source, target string) error {
|
|
if err := clonefile(source, target); err != nil {
|
|
if err != unix.EINVAL {
|
|
return err
|
|
}
|
|
} else {
|
|
return nil
|
|
}
|
|
|
|
src, err := os.Open(source)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to open source %s", source)
|
|
}
|
|
defer src.Close()
|
|
tgt, err := os.Create(target)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to open target %s", target)
|
|
}
|
|
defer tgt.Close()
|
|
|
|
return copyFileContent(tgt, src)
|
|
}
|
|
|
|
func copyFileContent(dst, src *os.File) error {
|
|
buf := bufferPool.Get().(*[]byte)
|
|
_, err := io.CopyBuffer(dst, src, *buf)
|
|
bufferPool.Put(buf)
|
|
|
|
return err
|
|
}
|
|
|
|
// errnoErr returns common boxed Errno values, to prevent
|
|
// allocations at runtime.
|
|
func errnoErr(e syscall.Errno) error {
|
|
switch e {
|
|
case 0:
|
|
return nil
|
|
case unix.EAGAIN:
|
|
return syscall.EAGAIN
|
|
case unix.EINVAL:
|
|
return syscall.EINVAL
|
|
case unix.ENOENT:
|
|
return syscall.ENOENT
|
|
}
|
|
return e
|
|
}
|
|
|
|
func clonefile(src, dst string) (err error) {
|
|
var _p0, _p1 *byte
|
|
_p0, err = unix.BytePtrFromString(src)
|
|
if err != nil {
|
|
return
|
|
}
|
|
_p1, err = unix.BytePtrFromString(dst)
|
|
if err != nil {
|
|
return
|
|
}
|
|
fdcwd := unix.AT_FDCWD
|
|
_, _, e1 := unix.Syscall6(unix.SYS_CLONEFILEAT, uintptr(fdcwd), uintptr(unsafe.Pointer(_p0)), uintptr(fdcwd), uintptr(unsafe.Pointer(_p1)), uintptr(CLONE_NOFOLLOW), 0)
|
|
if e1 != 0 {
|
|
err = errnoErr(e1)
|
|
}
|
|
return
|
|
}
|