mirror of
https://github.com/golang/go
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53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
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// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build wasip1
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package os
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import (
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"syscall"
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"unsafe"
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)
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// https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#-dirent-record
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const sizeOfDirent = 24
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func direntIno(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Ino), unsafe.Sizeof(syscall.Dirent{}.Ino))
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}
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func direntReclen(buf []byte) (uint64, bool) {
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namelen, ok := direntNamlen(buf)
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return sizeOfDirent + namelen, ok
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}
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func direntNamlen(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Namlen), unsafe.Sizeof(syscall.Dirent{}.Namlen))
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}
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func direntType(buf []byte) FileMode {
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off := unsafe.Offsetof(syscall.Dirent{}.Type)
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if off >= uintptr(len(buf)) {
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return ^FileMode(0) // unknown
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}
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switch syscall.Filetype(buf[off]) {
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case syscall.FILETYPE_BLOCK_DEVICE:
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return ModeDevice
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case syscall.FILETYPE_CHARACTER_DEVICE:
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return ModeDevice | ModeCharDevice
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case syscall.FILETYPE_DIRECTORY:
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return ModeDir
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case syscall.FILETYPE_REGULAR_FILE:
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return 0
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case syscall.FILETYPE_SOCKET_DGRAM:
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return ModeSocket
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case syscall.FILETYPE_SOCKET_STREAM:
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return ModeSocket
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case syscall.FILETYPE_SYMBOLIC_LINK:
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return ModeSymlink
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}
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return ^FileMode(0) // unknown
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}
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