42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
// Copyright 2009 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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package syscall
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import (
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"sync"
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"unsafe"
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)
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// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
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var (
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osreldateOnce sync.Once
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osreldate uint32
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)
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// First __DragonFly_version after September 2019 ABI changes
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// http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
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const _dragonflyABIChangeVersion = 500705
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func supportsABI(ver uint32) bool {
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osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
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return osreldate >= ver
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}
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func direntIno(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
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}
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func direntReclen(buf []byte) (uint64, bool) {
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namlen, ok := direntNamlen(buf)
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if !ok {
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return 0, false
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}
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return (16 + namlen + 1 + 7) &^ 7, true
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}
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func direntNamlen(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
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}
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