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Create pkg/system and move stuff there from archive

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This is a package for generic system calls etc that for some reason
is not yet supported by "syscall", or where it is different enough
for the different ports to need portability wrappers.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
This commit is contained in:
Alexander Larsson 2014-02-21 10:12:25 +01:00
parent 6f2564350f
commit d6114c0da0
9 changed files with 90 additions and 69 deletions
Download patch file Download diff file Expand all files Collapse all files

9
archive/archive.go
View file

@ -6,6 +6,7 @@ import (
"compress/gzip"
"errors"
"fmt"
"github.com/dotcloud/docker/pkg/system"
"github.com/dotcloud/docker/utils"
"github.com/dotcloud/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
"io"
@ -168,7 +169,7 @@ func addTarFile(path, name string, tw *tar.Writer) error {
}
capability, _ := Lgetxattr(path, "security.capability")
capability, _ := system.Lgetxattr(path, "security.capability")
if capability != nil {
hdr.Xattrs = make(map[string]string)
hdr.Xattrs["security.capability"] = string(capability)
@ -259,7 +260,7 @@ func createTarFile(path, extractDir string, hdr *tar.Header, reader io.Reader) e
}
for key, value := range hdr.Xattrs {
if err := Lsetxattr(path, key, []byte(value), 0); err != nil {
if err := system.Lsetxattr(path, key, []byte(value), 0); err != nil {
return err
}
}
@ -275,11 +276,11 @@ func createTarFile(path, extractDir string, hdr *tar.Header, reader io.Reader) e
ts := []syscall.Timespec{timeToTimespec(hdr.AccessTime), timeToTimespec(hdr.ModTime)}
// syscall.UtimesNano doesn't support a NOFOLLOW flag atm, and
if hdr.Typeflag != tar.TypeSymlink {
if err := UtimesNano(path, ts); err != nil {
if err := system.UtimesNano(path, ts); err != nil {
return err
}
} else {
if err := LUtimesNano(path, ts); err != nil {
if err := system.LUtimesNano(path, ts); err != nil {
return err
}
}

5
archive/changes.go
View file

@ -3,6 +3,7 @@ package archive
import (
"bytes"
"fmt"
"github.com/dotcloud/docker/pkg/system"
"github.com/dotcloud/docker/utils"
"github.com/dotcloud/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
"io"
@ -202,7 +203,7 @@ func (info *FileInfo) addChanges(oldInfo *FileInfo, changes *[]Change) {
oldStat.Rdev != newStat.Rdev ||
// Don't look at size for dirs, its not a good measure of change
(oldStat.Size != newStat.Size && oldStat.Mode&syscall.S_IFDIR != syscall.S_IFDIR) ||
!sameFsTimeSpec(getLastModification(oldStat), getLastModification(newStat)) ||
!sameFsTimeSpec(system.GetLastModification(oldStat), system.GetLastModification(newStat)) ||
bytes.Compare(oldChild.capability, newChild.capability) != 0 {
change := Change{
Path: newChild.path(),
@ -278,7 +279,7 @@ func collectFileInfo(sourceDir string) (*FileInfo, error) {
return err
}
info.capability, _ = Lgetxattr(path, "security.capability")
info.capability, _ = system.Lgetxattr(path, "security.capability")
parent.children[info.name] = info

29
archive/stat_unsupported.go
View file

@ -1,29 +0,0 @@
// +build !linux
package archive
import "syscall"
func getLastAccess(stat *syscall.Stat_t) syscall.Timespec {
return stat.Atimespec
}
func getLastModification(stat *syscall.Stat_t) syscall.Timespec {
return stat.Mtimespec
}
func LUtimesNano(path string, ts []syscall.Timespec) error {
return ErrNotImplemented
}
func UtimesNano(path string, ts []syscall.Timespec) error {
return ErrNotImplemented
}
func Lgetxattr(path string, attr string) ([]byte, error) {
return nil, ErrNotImplemented
}
func Lsetxattr(path string, attr string, data []byte, flags int) error {
return ErrNotImplemented
}

13
pkg/system/stat_linux.go Normal file
View file

@ -0,0 +1,13 @@
package system
import (
"syscall"
)
func GetLastAccess(stat *syscall.Stat_t) syscall.Timespec {
return stat.Atim
}
func GetLastModification(stat *syscall.Stat_t) syscall.Timespec {
return stat.Mtim
}

13
pkg/system/stat_unsupported.go Normal file
View file

@ -0,0 +1,13 @@
// +build !linux
package system
import "syscall"
func GetLastAccess(stat *syscall.Stat_t) syscall.Timespec {
return stat.Atimespec
}
func GetLastModification(stat *syscall.Stat_t) syscall.Timespec {
return stat.Mtimespec
}

31
pkg/system/utimes_linux.go Normal file
View file

@ -0,0 +1,31 @@
package system
import (
"syscall"
"unsafe"
)
func LUtimesNano(path string, ts []syscall.Timespec) error {
// These are not currently available in syscall
AT_FDCWD := -100
AT_SYMLINK_NOFOLLOW := 0x100
var _path *byte
_path, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
if _, _, err := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(AT_FDCWD), uintptr(unsafe.Pointer(_path)), uintptr(unsafe.Pointer(&ts[0])), uintptr(AT_SYMLINK_NOFOLLOW), 0, 0); err != 0 && err != syscall.ENOSYS {
return err
}
return nil
}
func UtimesNano(path string, ts []syscall.Timespec) error {
if err := syscall.UtimesNano(path, ts); err != nil {
return err
}
return nil
}

13
pkg/system/utimes_unsupported.go Normal file
View file

@ -0,0 +1,13 @@
// +build !linux
package system
import "syscall"
func LUtimesNano(path string, ts []syscall.Timespec) error {
return ErrNotSupportedPlatform
}
func UtimesNano(path string, ts []syscall.Timespec) error {
return ErrNotSupportedPlatform
}

35
archive/stat_linux.go → pkg/system/xattrs_linux.go
View file

@ -1,43 +1,10 @@
package archive
package system
import (
"syscall"
"unsafe"
)
func getLastAccess(stat *syscall.Stat_t) syscall.Timespec {
return stat.Atim
}
func getLastModification(stat *syscall.Stat_t) syscall.Timespec {
return stat.Mtim
}
func LUtimesNano(path string, ts []syscall.Timespec) error {
// These are not currently available in syscall
AT_FDCWD := -100
AT_SYMLINK_NOFOLLOW := 0x100
var _path *byte
_path, err := syscall.BytePtrFromString(path)
if err != nil {
return err
}
if _, _, err := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(AT_FDCWD), uintptr(unsafe.Pointer(_path)), uintptr(unsafe.Pointer(&ts[0])), uintptr(AT_SYMLINK_NOFOLLOW), 0, 0); err != 0 && err != syscall.ENOSYS {
return err
}
return nil
}
func UtimesNano(path string, ts []syscall.Timespec) error {
if err := syscall.UtimesNano(path, ts); err != nil {
return err
}
return nil
}
// Returns a nil slice and nil error if the xattr is not set
func Lgetxattr(path string, attr string) ([]byte, error) {
pathBytes, err := syscall.BytePtrFromString(path)

11
pkg/system/xattrs_unsupported.go Normal file
View file

@ -0,0 +1,11 @@
// +build !linux
package system
func Lgetxattr(path string, attr string) ([]byte, error) {
return nil, ErrNotSupportedPlatform
}
func Lsetxattr(path string, attr string, data []byte, flags int) error {
return ErrNotSupportedPlatform
}