github.com/stackdocker/rkt@v0.10.1-0.20151109095037-1aa827478248/pkg/fileutil/utimes_linux.go (about)

     1  // Copyright 2015 The rkt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // These functions are from github.com/docker/docker/pkg/system
    16  
    17  // TODO(sgotti) waiting for a utimensat functions accepting flags and a
    18  // LUtimesNano using it in https://github.com/golang/sys/
    19  
    20  package fileutil
    21  
    22  import (
    23  	"syscall"
    24  	"unsafe"
    25  )
    26  
    27  func LUtimesNano(path string, ts []syscall.Timespec) error {
    28  	// These are not currently available in syscall
    29  	AT_FDCWD := -100
    30  	AT_SYMLINK_NOFOLLOW := 0x100
    31  
    32  	var _path *byte
    33  	_path, err := syscall.BytePtrFromString(path)
    34  	if err != nil {
    35  		return err
    36  	}
    37  
    38  	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 {
    39  		return err
    40  	}
    41  
    42  	return nil
    43  }