mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-24 22:10:23 +00:00
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
// +build windows
|
|
|
|
package winfile
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
// issue also described here
|
|
//https://codereview.appspot.com/8203043/
|
|
|
|
// https://github.com/jnwhiteh/golang/blob/master/src/pkg/syscall/syscall_windows.go#L218
|
|
func Open(path string, mode int, perm uint32) (fd syscall.Handle, err error) {
|
|
if len(path) == 0 {
|
|
return syscall.InvalidHandle, syscall.ERROR_FILE_NOT_FOUND
|
|
}
|
|
pathp, err := syscall.UTF16PtrFromString(path)
|
|
if err != nil {
|
|
return syscall.InvalidHandle, err
|
|
}
|
|
var access uint32
|
|
switch mode & (syscall.O_RDONLY | syscall.O_WRONLY | syscall.O_RDWR) {
|
|
case syscall.O_RDONLY:
|
|
access = syscall.GENERIC_READ
|
|
case syscall.O_WRONLY:
|
|
access = syscall.GENERIC_WRITE
|
|
case syscall.O_RDWR:
|
|
access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
|
|
}
|
|
if mode&syscall.O_CREAT != 0 {
|
|
access |= syscall.GENERIC_WRITE
|
|
}
|
|
if mode&syscall.O_APPEND != 0 {
|
|
access &^= syscall.GENERIC_WRITE
|
|
access |= syscall.FILE_APPEND_DATA
|
|
}
|
|
sharemode := uint32(syscall.FILE_SHARE_READ | syscall.FILE_SHARE_WRITE | syscall.FILE_SHARE_DELETE)
|
|
var sa *syscall.SecurityAttributes
|
|
if mode&syscall.O_CLOEXEC == 0 {
|
|
sa = makeInheritSa()
|
|
}
|
|
var createmode uint32
|
|
switch {
|
|
case mode&(syscall.O_CREAT|syscall.O_EXCL) == (syscall.O_CREAT | syscall.O_EXCL):
|
|
createmode = syscall.CREATE_NEW
|
|
case mode&(syscall.O_CREAT|syscall.O_TRUNC) == (syscall.O_CREAT | syscall.O_TRUNC):
|
|
createmode = syscall.CREATE_ALWAYS
|
|
case mode&syscall.O_CREAT == syscall.O_CREAT:
|
|
createmode = syscall.OPEN_ALWAYS
|
|
case mode&syscall.O_TRUNC == syscall.O_TRUNC:
|
|
createmode = syscall.TRUNCATE_EXISTING
|
|
default:
|
|
createmode = syscall.OPEN_EXISTING
|
|
}
|
|
h, e := syscall.CreateFile(pathp, access, sharemode, sa, createmode, syscall.FILE_ATTRIBUTE_NORMAL, 0)
|
|
return h, e
|
|
}
|
|
|
|
// https://github.com/jnwhiteh/golang/blob/master/src/pkg/syscall/syscall_windows.go#L211
|
|
func makeInheritSa() *syscall.SecurityAttributes {
|
|
var sa syscall.SecurityAttributes
|
|
sa.Length = uint32(unsafe.Sizeof(sa))
|
|
sa.InheritHandle = 1
|
|
return &sa
|
|
}
|
|
|
|
// https://github.com/jnwhiteh/golang/blob/master/src/pkg/os/file_windows.go#L133
|
|
func OpenFile(name string, flag int, perm os.FileMode) (file *os.File, err error) {
|
|
r, e := Open(name, flag|syscall.O_CLOEXEC, syscallMode(perm))
|
|
if e != nil {
|
|
return nil, e
|
|
}
|
|
return os.NewFile(uintptr(r), name), nil
|
|
}
|
|
|
|
// https://github.com/jnwhiteh/golang/blob/master/src/pkg/os/file_posix.go#L61
|
|
func syscallMode(i os.FileMode) (o uint32) {
|
|
o |= uint32(i.Perm())
|
|
if i&os.ModeSetuid != 0 {
|
|
o |= syscall.S_ISUID
|
|
}
|
|
if i&os.ModeSetgid != 0 {
|
|
o |= syscall.S_ISGID
|
|
}
|
|
if i&os.ModeSticky != 0 {
|
|
o |= syscall.S_ISVTX
|
|
}
|
|
// No mapping for Go's ModeTemporary (plan9 only).
|
|
return
|
|
}
|