// Copyright 2009,2010 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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// FreeBSD system calls.
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// This file is compiled as ordinary Go code,
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// but it is also input to mksyscall,
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// which parses the //sys lines and generates system call stubs.
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// Note that sometimes we use a lowercase //sys name and wrap
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// it in our own nicer implementation, either here or in
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// syscall_bsd.go or syscall_unix.go.
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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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const (
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_SYS_FSTAT_FREEBSD12 = 551 // { int fstat(int fd, _Out_ struct stat *sb); }
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_SYS_FSTATAT_FREEBSD12 = 552 // { int fstatat(int fd, _In_z_ char *path, \
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_SYS_GETDIRENTRIES_FREEBSD12 = 554 // { ssize_t getdirentries(int fd, \
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_SYS_STATFS_FREEBSD12 = 555 // { int statfs(_In_z_ char *path, \
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_SYS_FSTATFS_FREEBSD12 = 556 // { int fstatfs(int fd, \
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_SYS_GETFSSTAT_FREEBSD12 = 557 // { int getfsstat( \
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_SYS_MKNODAT_FREEBSD12 = 559 // { int mknodat(int fd, _In_z_ char *path, \
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)
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// See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html.
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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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// INO64_FIRST from /usr/src/lib/libc/sys/compat-ino64.h
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const _ino64First = 1200031
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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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type SockaddrDatalink struct {
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Len uint8
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Family uint8
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Index uint16
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Type uint8
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Nlen uint8
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Alen uint8
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Slen uint8
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Data [46]int8
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raw RawSockaddrDatalink
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}
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// Translate "kern.hostname" to []_C_int{0,1,2,3}.
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func nametomib(name string) (mib []_C_int, err error) {
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const siz = unsafe.Sizeof(mib[0])
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// NOTE(rsc): It seems strange to set the buffer to have
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// size CTL_MAXNAME+2 but use only CTL_MAXNAME
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// as the size. I don't know why the +2 is here, but the
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// kernel uses +2 for its own implementation of this function.
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// I am scared that if we don't include the +2 here, the kernel
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// will silently write 2 words farther than we specify
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// and we'll get memory corruption.
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var buf [CTL_MAXNAME + 2]_C_int
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n := uintptr(CTL_MAXNAME) * siz
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p := (*byte)(unsafe.Pointer(&buf[0]))
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bytes, err := ByteSliceFromString(name)
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if err != nil {
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return nil, err
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}
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// Magic sysctl: "setting" 0.3 to a string name
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// lets you read back the array of integers form.
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if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
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return nil, err
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}
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return buf[0 : n/siz], nil
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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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return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
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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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func Pipe(p []int) error {
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return Pipe2(p, 0)
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}
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//sysnb pipe2(p *[2]_C_int, flags int) (err error)
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func Pipe2(p []int, flags int) error {
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if len(p) != 2 {
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return EINVAL
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}
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var pp [2]_C_int
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err := pipe2(&pp, flags)
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p[0] = int(pp[0])
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p[1] = int(pp[1])
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return err
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}
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func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
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var value IPMreqn
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vallen := _Socklen(SizeofIPMreqn)
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errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
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return &value, errno
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}
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func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
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return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
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}
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func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
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var rsa RawSockaddrAny
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var len _Socklen = SizeofSockaddrAny
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nfd, err = accept4(fd, &rsa, &len, flags)
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if err != nil {
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return
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}
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if len > SizeofSockaddrAny {
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panic("RawSockaddrAny too small")
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}
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sa, err = anyToSockaddr(&rsa)
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if err != nil {
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Close(nfd)
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nfd = 0
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}
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return
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}
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func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
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var (
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_p0 unsafe.Pointer
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bufsize uintptr
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oldBuf []statfs_freebsd11_t
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needsConvert bool
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)
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if len(buf) > 0 {
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if supportsABI(_ino64First) {
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_p0 = unsafe.Pointer(&buf[0])
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bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
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} else {
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n := len(buf)
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oldBuf = make([]statfs_freebsd11_t, n)
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_p0 = unsafe.Pointer(&oldBuf[0])
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bufsize = unsafe.Sizeof(statfs_freebsd11_t{}) * uintptr(n)
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needsConvert = true
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}
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}
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var sysno uintptr = SYS_GETFSSTAT
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if supportsABI(_ino64First) {
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sysno = _SYS_GETFSSTAT_FREEBSD12
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}
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r0, _, e1 := Syscall(sysno, uintptr(_p0), bufsize, uintptr(flags))
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n = int(r0)
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if e1 != 0 {
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err = e1
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}
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if e1 == 0 && needsConvert {
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for i := range oldBuf {
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buf[i].convertFrom(&oldBuf[i])
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}
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}
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return
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}
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func setattrlistTimes(path string, times []Timespec) error {
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// used on Darwin for UtimesNano
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return ENOSYS
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}
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func Stat(path string, st *Stat_t) (err error) {
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var oldStat stat_freebsd11_t
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if supportsABI(_ino64First) {
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return fstatat_freebsd12(_AT_FDCWD, path, st, 0)
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}
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err = stat(path, &oldStat)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStat)
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return nil
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}
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func Lstat(path string, st *Stat_t) (err error) {
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var oldStat stat_freebsd11_t
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if supportsABI(_ino64First) {
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return fstatat_freebsd12(_AT_FDCWD, path, st, _AT_SYMLINK_NOFOLLOW)
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}
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err = lstat(path, &oldStat)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStat)
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return nil
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}
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func Fstat(fd int, st *Stat_t) (err error) {
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var oldStat stat_freebsd11_t
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if supportsABI(_ino64First) {
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return fstat_freebsd12(fd, st)
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}
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err = fstat(fd, &oldStat)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStat)
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return nil
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}
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func Fstatat(fd int, path string, st *Stat_t, flags int) (err error) {
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var oldStat stat_freebsd11_t
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if supportsABI(_ino64First) {
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return fstatat_freebsd12(fd, path, st, flags)
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}
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err = fstatat(fd, path, &oldStat, flags)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStat)
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return nil
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}
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func Statfs(path string, st *Statfs_t) (err error) {
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var oldStatfs statfs_freebsd11_t
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if supportsABI(_ino64First) {
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return statfs_freebsd12(path, st)
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}
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err = statfs(path, &oldStatfs)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStatfs)
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return nil
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}
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func Fstatfs(fd int, st *Statfs_t) (err error) {
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var oldStatfs statfs_freebsd11_t
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if supportsABI(_ino64First) {
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return fstatfs_freebsd12(fd, st)
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}
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err = fstatfs(fd, &oldStatfs)
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if err != nil {
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return err
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}
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st.convertFrom(&oldStatfs)
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return nil
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}
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func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
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if supportsABI(_ino64First) {
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return getdirentries_freebsd12(fd, buf, basep)
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}
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// The old syscall entries are smaller than the new. Use 1/4 of the original
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// buffer size rounded up to DIRBLKSIZ (see /usr/src/lib/libc/sys/getdirentries.c).
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oldBufLen := roundup(len(buf)/4, _dirblksiz)
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oldBuf := make([]byte, oldBufLen)
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n, err = getdirentries(fd, oldBuf, basep)
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if err == nil && n > 0 {
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n = convertFromDirents11(buf, oldBuf[:n])
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}
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return
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}
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func Mknod(path string, mode uint32, dev uint64) (err error) {
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var oldDev int
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if supportsABI(_ino64First) {
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return mknodat_freebsd12(_AT_FDCWD, path, mode, dev)
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}
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oldDev = int(dev)
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return mknod(path, mode, oldDev)
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}
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// round x to the nearest multiple of y, larger or equal to x.
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//
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// from /usr/include/sys/param.h Macros for counting and rounding.
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// #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
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func roundup(x, y int) int {
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return ((x + y - 1) / y) * y
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}
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func (s *Stat_t) convertFrom(old *stat_freebsd11_t) {
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*s = Stat_t{
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Dev: uint64(old.Dev),
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Ino: uint64(old.Ino),
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Nlink: uint64(old.Nlink),
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Mode: old.Mode,
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Uid: old.Uid,
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Gid: old.Gid,
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Rdev: uint64(old.Rdev),
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Atimespec: old.Atimespec,
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Mtimespec: old.Mtimespec,
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Ctimespec: old.Ctimespec,
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Birthtimespec: old.Birthtimespec,
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Size: old.Size,
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Blocks: old.Blocks,
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Blksize: old.Blksize,
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Flags: old.Flags,
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Gen: uint64(old.Gen),
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}
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}
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func (s *Statfs_t) convertFrom(old *statfs_freebsd11_t) {
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*s = Statfs_t{
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Version: _statfsVersion,
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Type: old.Type,
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Flags: old.Flags,
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Bsize: old.Bsize,
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Iosize: old.Iosize,
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Blocks: old.Blocks,
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Bfree: old.Bfree,
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Bavail: old.Bavail,
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Files: old.Files,
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Ffree: old.Ffree,
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Syncwrites: old.Syncwrites,
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Asyncwrites: old.Asyncwrites,
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Syncreads: old.Syncreads,
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Asyncreads: old.Asyncreads,
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// Spare
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Namemax: old.Namemax,
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Owner: old.Owner,
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Fsid: old.Fsid,
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// Charspare
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// Fstypename
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// Mntfromname
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// Mntonname
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}
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sl := old.Fstypename[:]
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n := clen(*(*[]byte)(unsafe.Pointer(&sl)))
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copy(s.Fstypename[:], old.Fstypename[:n])
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sl = old.Mntfromname[:]
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n = clen(*(*[]byte)(unsafe.Pointer(&sl)))
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copy(s.Mntfromname[:], old.Mntfromname[:n])
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sl = old.Mntonname[:]
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n = clen(*(*[]byte)(unsafe.Pointer(&sl)))
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copy(s.Mntonname[:], old.Mntonname[:n])
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}
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func convertFromDirents11(buf []byte, old []byte) int {
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const (
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fixedSize = int(unsafe.Offsetof(Dirent{}.Name))
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oldFixedSize = int(unsafe.Offsetof(dirent_freebsd11{}.Name))
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)
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dstPos := 0
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srcPos := 0
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for dstPos+fixedSize < len(buf) && srcPos+oldFixedSize < len(old) {
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dstDirent := (*Dirent)(unsafe.Pointer(&buf[dstPos]))
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srcDirent := (*dirent_freebsd11)(unsafe.Pointer(&old[srcPos]))
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reclen := roundup(fixedSize+int(srcDirent.Namlen)+1, 8)
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if dstPos+reclen > len(buf) {
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break
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}
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dstDirent.Fileno = uint64(srcDirent.Fileno)
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dstDirent.Off = 0
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dstDirent.Reclen = uint16(reclen)
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dstDirent.Type = srcDirent.Type
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dstDirent.Pad0 = 0
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dstDirent.Namlen = uint16(srcDirent.Namlen)
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dstDirent.Pad1 = 0
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copy(dstDirent.Name[:], srcDirent.Name[:srcDirent.Namlen])
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padding := buf[dstPos+fixedSize+int(dstDirent.Namlen) : dstPos+reclen]
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for i := range padding {
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padding[i] = 0
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}
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dstPos += int(dstDirent.Reclen)
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srcPos += int(srcDirent.Reclen)
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}
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return dstPos
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}
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/*
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* Exposed directly
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*/
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//sys Access(path string, mode uint32) (err error)
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//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
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//sys Chdir(path string) (err error)
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//sys Chflags(path string, flags int) (err error)
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//sys Chmod(path string, mode uint32) (err error)
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//sys Chown(path string, uid int, gid int) (err error)
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//sys Chroot(path string) (err error)
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//sys Close(fd int) (err error)
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//sys Dup(fd int) (nfd int, err error)
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//sys Dup2(from int, to int) (err error)
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//sys Fchdir(fd int) (err error)
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//sys Fchflags(fd int, flags int) (err error)
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//sys Fchmod(fd int, mode uint32) (err error)
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//sys Fchown(fd int, uid int, gid int) (err error)
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//sys Flock(fd int, how int) (err error)
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//sys Fpathconf(fd int, name int) (val int, err error)
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//sys fstat(fd int, stat *stat_freebsd11_t) (err error)
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//sys fstat_freebsd12(fd int, stat *Stat_t) (err error) = _SYS_FSTAT_FREEBSD12
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//sys fstatat(fd int, path string, stat *stat_freebsd11_t, flags int) (err error)
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//sys fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) = _SYS_FSTATAT_FREEBSD12
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//sys fstatfs(fd int, stat *statfs_freebsd11_t) (err error)
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//sys fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) = _SYS_FSTATFS_FREEBSD12
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//sys Fsync(fd int) (err error)
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//sys Ftruncate(fd int, length int64) (err error)
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//sys getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
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//sys getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) = _SYS_GETDIRENTRIES_FREEBSD12
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//sys Getdtablesize() (size int)
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//sysnb Getegid() (egid int)
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//sysnb Geteuid() (uid int)
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//sysnb Getgid() (gid int)
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//sysnb Getpgid(pid int) (pgid int, err error)
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//sysnb Getpgrp() (pgrp int)
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//sysnb Getpid() (pid int)
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//sysnb Getppid() (ppid int)
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//sys Getpriority(which int, who int) (prio int, err error)
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//sysnb Getrlimit(which int, lim *Rlimit) (err error)
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//sysnb Getrusage(who int, rusage *Rusage) (err error)
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//sysnb Getsid(pid int) (sid int, err error)
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//sysnb Gettimeofday(tv *Timeval) (err error)
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//sysnb Getuid() (uid int)
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//sys Issetugid() (tainted bool)
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//sys Kill(pid int, signum Signal) (err error)
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//sys Kqueue() (fd int, err error)
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//sys Lchown(path string, uid int, gid int) (err error)
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//sys Link(path string, link string) (err error)
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//sys Listen(s int, backlog int) (err error)
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//sys lstat(path string, stat *stat_freebsd11_t) (err error)
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//sys Mkdir(path string, mode uint32) (err error)
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//sys Mkfifo(path string, mode uint32) (err error)
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//sys mknod(path string, mode uint32, dev int) (err error)
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//sys mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) = _SYS_MKNODAT_FREEBSD12
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//sys Nanosleep(time *Timespec, leftover *Timespec) (err error)
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//sys Open(path string, mode int, perm uint32) (fd int, err error)
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//sys Pathconf(path string, name int) (val int, err error)
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//sys Pread(fd int, p []byte, offset int64) (n int, err error)
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//sys Pwrite(fd int, p []byte, offset int64) (n int, err error)
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//sys read(fd int, p []byte) (n int, err error)
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//sys Readlink(path string, buf []byte) (n int, err error)
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//sys Rename(from string, to string) (err error)
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//sys Revoke(path string) (err error)
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//sys Rmdir(path string) (err error)
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//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
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//sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
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//sysnb Setegid(egid int) (err error)
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//sysnb Seteuid(euid int) (err error)
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//sysnb Setgid(gid int) (err error)
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//sys Setlogin(name string) (err error)
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//sysnb Setpgid(pid int, pgid int) (err error)
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//sys Setpriority(which int, who int, prio int) (err error)
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//sysnb Setregid(rgid int, egid int) (err error)
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//sysnb Setreuid(ruid int, euid int) (err error)
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//sysnb Setrlimit(which int, lim *Rlimit) (err error)
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//sysnb Setsid() (pid int, err error)
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//sysnb Settimeofday(tp *Timeval) (err error)
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//sysnb Setuid(uid int) (err error)
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//sys stat(path string, stat *stat_freebsd11_t) (err error)
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//sys statfs(path string, stat *statfs_freebsd11_t) (err error)
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//sys statfs_freebsd12(path string, stat *Statfs_t) (err error) = _SYS_STATFS_FREEBSD12
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//sys Symlink(path string, link string) (err error)
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//sys Sync() (err error)
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//sys Truncate(path string, length int64) (err error)
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//sys Umask(newmask int) (oldmask int)
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//sys Undelete(path string) (err error)
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//sys Unlink(path string) (err error)
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//sys Unmount(path string, flags int) (err error)
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//sys write(fd int, p []byte) (n int, err error)
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//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
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//sys munmap(addr uintptr, length uintptr) (err error)
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//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
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//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
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//sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
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//sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
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//sys getcwd(buf []byte) (n int, err error) = SYS___GETCWD
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//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
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