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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// DragonFly BSD system calls.
// This file is compiled as ordinary Go code,
// but it is also input to mksyscall,
// which parses the //sys lines and generates system call stubs.
// Note that sometimes we use a lowercase //sys name and wrap
// it in our own nicer implementation, either here or in
// syscall_bsd.go or syscall_unix.go.
package unix
import (
"sync"
"unsafe"
)
// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
var (
osreldateOnce sync.Once
osreldate uint32
)
// First __DragonFly_version after September 2019 ABI changes
// http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
const _dragonflyABIChangeVersion = 500705
func supportsABI(ver uint32) bool {
osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
return osreldate >= ver
}
// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
type SockaddrDatalink struct {
Len uint8
Family uint8
Index uint16
Type uint8
Nlen uint8
Alen uint8
Slen uint8
Data [12]int8
Rcf uint16
Route [16]uint16
raw RawSockaddrDatalink
}
// Translate "kern.hostname" to []_C_int{0,1,2,3}.
func nametomib(name string) (mib []_C_int, err error) {
const siz = unsafe.Sizeof(mib[0])
// NOTE(rsc): It seems strange to set the buffer to have
// size CTL_MAXNAME+2 but use only CTL_MAXNAME
// as the size. I don't know why the +2 is here, but the
// kernel uses +2 for its own implementation of this function.
// I am scared that if we don't include the +2 here, the kernel
// will silently write 2 words farther than we specify
// and we'll get memory corruption.
var buf [CTL_MAXNAME + 2]_C_int
n := uintptr(CTL_MAXNAME) * siz
p := (*byte)(unsafe.Pointer(&buf[0]))
bytes, err := ByteSliceFromString(name)
if err != nil {
return nil, err
}
// Magic sysctl: "setting" 0.3 to a string name
// lets you read back the array of integers form.
if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
return nil, err
}
return buf[0 : n/siz], nil
}
func direntIno(buf []byte) (uint64, bool) {
return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
}
func direntReclen(buf []byte) (uint64, bool) {
namlen, ok := direntNamlen(buf)
if !ok {
return 0, false
}
return (16 + namlen + 1 + 7) &^ 7, true
}
func direntNamlen(buf []byte) (uint64, bool) {
return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
}
//sysnb pipe() (r int, w int, err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
p[0], p[1], err = pipe()
return
}
//sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
func Pread(fd int, p []byte, offset int64) (n int, err error) {
return extpread(fd, p, 0, offset)
}
//sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
return extpwrite(fd, p, 0, offset)
}
func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
var rsa RawSockaddrAny
var len _Socklen = SizeofSockaddrAny
nfd, err = accept4(fd, &rsa, &len, flags)
if err != nil {
return
}
if len > SizeofSockaddrAny {
panic("RawSockaddrAny too small")
}
sa, err = anyToSockaddr(fd, &rsa)
if err != nil {
Close(nfd)
nfd = 0
}
return
}
const ImplementsGetwd = true
//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
func Getwd() (string, error) {
var buf [PathMax]byte
_, err := Getcwd(buf[0:])
if err != nil {
return "", err
}
n := clen(buf[:])
if n < 1 {
return "", EINVAL
}
return string(buf[:n]), nil
}
func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
var _p0 unsafe.Pointer
var bufsize uintptr
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
}
r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
func setattrlistTimes(path string, times []Timespec, flags int) error {
// used on Darwin for UtimesNano
return ENOSYS
}
//sys ioctl(fd int, req uint, arg uintptr) (err error)
//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error {
err := sysctl(mib, old, oldlen, nil, 0)
if err != nil
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