MyFavMirrors
/
minio
mirror of https://github.com/minio/minio.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

lock, Windows: O_CREAT infers only GENERIC_WRITE (#3981) 

Avoid using GENERIC_ALL flag when creating a file since it could
return permission denied in some Windows versions.
This commit is contained in:
Anis Elleuch 2017-03-27 20:47:39 +01:00 committed by Harshavardhana
parent a9c0f1e0a4
commit 1b3a517683
1 changed files with 8 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
pkg/lock/lock_windows.go
View File

@ -1,7 +1,7 @@
// +build windows
/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
* Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -20,6 +20,7 @@ package lock
import (
"errors"
"fmt"
"os"
"syscall"
"unsafe"
@ -68,13 +69,6 @@ func LockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error
return &LockedFile{File: f}, nil
}
func makeInheritSa() *syscall.SecurityAttributes {
var sa syscall.SecurityAttributes
sa.Length = uint32(unsafe.Sizeof(sa))
sa.InheritHandle = 1
return &sa
}
// perm param is ignored, on windows file perms/NT acls
// are not octet combinations. Providing access to NT
// acls is out of scope here.
@ -95,33 +89,19 @@ func open(path string, flag int, perm os.FileMode) (*os.File, error) {
case syscall.O_WRONLY:
access = syscall.GENERIC_WRITE
case syscall.O_RDWR:
access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
fallthrough
case syscall.O_RDWR | syscall.O_CREAT:
access = syscall.GENERIC_ALL
fallthrough
case syscall.O_WRONLY | syscall.O_CREAT:
access = syscall.GENERIC_ALL
}
if flag&syscall.O_APPEND != 0 {
access &^= syscall.GENERIC_WRITE
access |= syscall.FILE_APPEND_DATA
}
var sa *syscall.SecurityAttributes
if flag&syscall.O_CLOEXEC == 0 {
sa = makeInheritSa()
access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
default:
return nil, fmt.Errorf("Unsupported flag (%d)", flag)
}
var createflag uint32
switch {
case flag&(syscall.O_CREAT|syscall.O_EXCL) == (syscall.O_CREAT | syscall.O_EXCL):
createflag = syscall.CREATE_NEW
case flag&(syscall.O_CREAT|syscall.O_TRUNC) == (syscall.O_CREAT | syscall.O_TRUNC):
createflag = syscall.CREATE_ALWAYS
case flag&syscall.O_CREAT == syscall.O_CREAT:
createflag = syscall.OPEN_ALWAYS
case flag&syscall.O_TRUNC == syscall.O_TRUNC:
createflag = syscall.TRUNCATE_EXISTING
default:
createflag = syscall.OPEN_EXISTING
}
@ -129,7 +109,7 @@ func open(path string, flag int, perm os.FileMode) (*os.File, error) {
shareflag := uint32(syscall.FILE_SHARE_READ | syscall.FILE_SHARE_WRITE | syscall.FILE_SHARE_DELETE)
accessAttr := uint32(syscall.FILE_ATTRIBUTE_NORMAL | 0x80000000)
fd, err := syscall.CreateFile(pathp, access, shareflag, sa, createflag, accessAttr, 0)
fd, err := syscall.CreateFile(pathp, access, shareflag, nil, createflag, accessAttr, 0)
if err != nil {
return nil, err
}