diff options
Diffstat (limited to 'vendor/github.com/hpcloud/tail/winfile/winfile.go')
-rw-r--r-- | vendor/github.com/hpcloud/tail/winfile/winfile.go | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/github.com/hpcloud/tail/winfile/winfile.go b/vendor/github.com/hpcloud/tail/winfile/winfile.go new file mode 100644 index 000000000..aa7e7bc5d --- /dev/null +++ b/vendor/github.com/hpcloud/tail/winfile/winfile.go @@ -0,0 +1,92 @@ +// +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 +} |