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5e66757b83
Crossing Dirent.Reclen boundry was manifested in golang/go#28131 as garbaled filenames, when Dirent.Name was not NULL terminated on FreeBSD due to a bug (parseDirEnt would find a NULL in the following Dirent's Fileno/Reclen fields). Only search for NULL on linux, when the Namlen field is available use it directly instead. Updates golang/go#28131 Change-Id: I64090576c8bad2bd246d1561432bf73d5caee2a9 Reviewed-on: https://go-review.googlesource.com/c/141801 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
25 lines
622 B
Go
25 lines
622 B
Go
// Copyright 2018 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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// +build linux
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// +build !appengine
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package fastwalk
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import (
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"bytes"
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"syscall"
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"unsafe"
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)
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func direntNamlen(dirent *syscall.Dirent) uint64 {
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const fixedHdr = uint16(unsafe.Offsetof(syscall.Dirent{}.Name))
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nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
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nameLen := bytes.IndexByte(nameBuf[:dirent.Reclen-fixedHdr], 0)
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if nameLen < 0 {
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panic("failed to find terminating 0 byte in dirent")
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}
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return uint64(nameLen)
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}
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