Make Nix builds work

1 files changed, 609 insertions, 0 deletions

diff --git a/vendor/golang.org/x/sys/unix/syscall_bsd.go b/vendor/golang.org/x/sys/unix/syscall_bsd.go
new file mode 100644
index 0000000..a00c3e5
--- /dev/null
+++ b/vendor/golang.org/x/sys/unix/syscall_bsd.go
@@ -0,0 +1,609 @@
+// 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.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+
+// BSD system call wrappers shared by *BSD based systems
+// including OS X (Darwin) and FreeBSD.  Like the other
+// syscall_*.go files it is compiled as Go code but also
+// used as input to mksyscall which parses the //sys
+// lines and generates system call stubs.
+
+package unix
+
+import (
+        "runtime"
+        "syscall"
+        "unsafe"
+)
+
+const ImplementsGetwd = true
+
+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
+}
+
+/*
+ * Wrapped
+ */
+
+//sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error)
+//sysnb setgroups(ngid int, gid *_Gid_t) (err error)
+
+func Getgroups() (gids []int, err error) {
+        n, err := getgroups(0, nil)
+        if err != nil {
+                return nil, err
+        }
+        if n == 0 {
+                return nil, nil
+        }
+
+        // Sanity check group count. Max is 16 on BSD.
+        if n < 0 || n > 1000 {
+                return nil, EINVAL
+        }
+
+        a := make([]_Gid_t, n)
+        n, err = getgroups(n, &a[0])
+        if err != nil {
+                return nil, err
+        }
+        gids = make([]int, n)
+        for i, v := range a[0:n] {
+                gids[i] = int(v)
+        }
+        return
+}
+
+func Setgroups(gids []int) (err error) {
+        if len(gids) == 0 {
+                return setgroups(0, nil)
+        }
+
+        a := make([]_Gid_t, len(gids))
+        for i, v := range gids {
+                a[i] = _Gid_t(v)
+        }
+        return setgroups(len(a), &a[0])
+}
+
+// Wait status is 7 bits at bottom, either 0 (exited),
+// 0x7F (stopped), or a signal number that caused an exit.
+// The 0x80 bit is whether there was a core dump.
+// An extra number (exit code, signal causing a stop)
+// is in the high bits.
+
+type WaitStatus uint32
+
+const (
+        mask  = 0x7F
+        core  = 0x80
+        shift = 8
+
+        exited  = 0
+        killed  = 9
+        stopped = 0x7F
+)
+
+func (w WaitStatus) Exited() bool { return w&mask == exited }
+
+func (w WaitStatus) ExitStatus() int {
+        if w&mask != exited {
+                return -1
+        }
+        return int(w >> shift)
+}
+
+func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 }
+
+func (w WaitStatus) Signal() syscall.Signal {
+        sig := syscall.Signal(w & mask)
+        if sig == stopped || sig == 0 {
+                return -1
+        }
+        return sig
+}
+
+func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 }
+
+func (w WaitStatus) Stopped() bool { return w&mask == stopped && syscall.Signal(w>>shift) != SIGSTOP }
+
+func (w WaitStatus) Killed() bool { return w&mask == killed && syscall.Signal(w>>shift) != SIGKILL }
+
+func (w WaitStatus) Continued() bool { return w&mask == stopped && syscall.Signal(w>>shift) == SIGSTOP }
+
+func (w WaitStatus) StopSignal() syscall.Signal {
+        if !w.Stopped() {
+                return -1
+        }
+        return syscall.Signal(w>>shift) & 0xFF
+}
+
+func (w WaitStatus) TrapCause() int { return -1 }
+
+//sys   wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error)
+
+func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
+        var status _C_int
+        wpid, err = wait4(pid, &status, options, rusage)
+        if wstatus != nil {
+                *wstatus = WaitStatus(status)
+        }
+        return
+}
+
+//sys   accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
+//sys   bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sys   connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sysnb socket(domain int, typ int, proto int) (fd int, err error)
+//sys   getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
+//sys   setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
+//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sys   Shutdown(s int, how int) (err error)
+
+func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
+        if sa.Port < 0 || sa.Port > 0xFFFF {
+                return nil, 0, EINVAL
+        }
+        sa.raw.Len = SizeofSockaddrInet4
+        sa.raw.Family = AF_INET
+        p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
+        p[0] = byte(sa.Port >> 8)
+        p[1] = byte(sa.Port)
+        sa.raw.Addr = sa.Addr
+        return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
+}
+
+func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
+        if sa.Port < 0 || sa.Port > 0xFFFF {
+                return nil, 0, EINVAL
+        }
+        sa.raw.Len = SizeofSockaddrInet6
+        sa.raw.Family = AF_INET6
+        p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
+        p[0] = byte(sa.Port >> 8)
+        p[1] = byte(sa.Port)
+        sa.raw.Scope_id = sa.ZoneId
+        sa.raw.Addr = sa.Addr
+        return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
+}
+
+func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
+        name := sa.Name
+        n := len(name)
+        if n >= len(sa.raw.Path) || n == 0 {
+                return nil, 0, EINVAL
+        }
+        sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL
+        sa.raw.Family = AF_UNIX
+        for i := 0; i < n; i++ {
+                sa.raw.Path[i] = int8(name[i])
+        }
+        return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
+}
+
+func (sa *SockaddrDatalink) sockaddr() (unsafe.Pointer, _Socklen, error) {
+        if sa.Index == 0 {
+                return nil, 0, EINVAL
+        }
+        sa.raw.Len = sa.Len
+        sa.raw.Family = AF_LINK
+        sa.raw.Index = sa.Index
+        sa.raw.Type = sa.Type
+        sa.raw.Nlen = sa.Nlen
+        sa.raw.Alen = sa.Alen
+        sa.raw.Slen = sa.Slen
+        sa.raw.Data = sa.Data
+        return unsafe.Pointer(&sa.raw), SizeofSockaddrDatalink, nil
+}
+
+func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
+        switch rsa.Addr.Family {
+        case AF_LINK:
+                pp := (*RawSockaddrDatalink)(unsafe.Pointer(rsa))
+                sa := new(SockaddrDatalink)
+                sa.Len = pp.Len
+                sa.Family = pp.Family
+                sa.Index = pp.Index
+                sa.Type = pp.Type
+                sa.Nlen = pp.Nlen
+                sa.Alen = pp.Alen
+                sa.Slen = pp.Slen
+                sa.Data = pp.Data
+                return sa, nil
+
+        case AF_UNIX:
+                pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
+                if pp.Len < 2 || pp.Len > SizeofSockaddrUnix {
+                        return nil, EINVAL
+                }
+                sa := new(SockaddrUnix)
+
+                // Some BSDs include the trailing NUL in the length, whereas
+                // others do not. Work around this by subtracting the leading
+                // family and len. The path is then scanned to see if a NUL
+                // terminator still exists within the length.
+                n := int(pp.Len) - 2 // subtract leading Family, Len
+                for i := 0; i < n; i++ {
+                        if pp.Path[i] == 0 {
+                                // found early NUL; assume Len included the NUL
+                                // or was overestimating.
+                                n = i
+                                break
+                        }
+                }
+                sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n))
+                return sa, nil
+
+        case AF_INET:
+                pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
+                sa := new(SockaddrInet4)
+                p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+                sa.Port = int(p[0])<<8 + int(p[1])
+                sa.Addr = pp.Addr
+                return sa, nil
+
+        case AF_INET6:
+                pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
+                sa := new(SockaddrInet6)
+                p := (*[2]byte)(unsafe.Pointer(&pp.Port))
+                sa.Port = int(p[0])<<8 + int(p[1])
+                sa.ZoneId = pp.Scope_id
+                sa.Addr = pp.Addr
+                return sa, nil
+        }
+        return anyToSockaddrGOOS(fd, rsa)
+}
+
+func Accept(fd int) (nfd int, sa Sockaddr, err error) {
+        var rsa RawSockaddrAny
+        var len _Socklen = SizeofSockaddrAny
+        nfd, err = accept(fd, &rsa, &len)
+        if err != nil {
+                return
+        }
+        if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && len == 0 {
+                // Accepted socket has no address.
+                // This is likely due to a bug in xnu kernels,
+                // where instead of ECONNABORTED error socket
+                // is accepted, but has no address.
+                Close(nfd)
+                return 0, nil, ECONNABORTED
+        }
+        sa, err = anyToSockaddr(fd, &rsa)
+        if err != nil {
+                Close(nfd)
+                nfd = 0
+        }
+        return
+}
+
+func Getsockname(fd int) (sa Sockaddr, err error) {
+        var rsa RawSockaddrAny
+        var len _Socklen = SizeofSockaddrAny
+        if err = getsockname(fd, &rsa, &len); err != nil {
+                return
+        }
+        // TODO(jsing): DragonFly has a "bug" (see issue 3349), which should be
+        // reported upstream.
+        if runtime.GOOS == "dragonfly" && rsa.Addr.Family == AF_UNSPEC && rsa.Addr.Len == 0 {
+                rsa.Addr.Family = AF_UNIX
+                rsa.Addr.Len = SizeofSockaddrUnix
+        }
+        return anyToSockaddr(fd, &rsa)
+}
+
+//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
+
+// GetsockoptString returns the string value of the socket option opt for the
+// socket associated with fd at the given socket level.
+func GetsockoptString(fd, level, opt int) (string, error) {
+        buf := make([]byte, 256)
+        vallen := _Socklen(len(buf))
+        err := getsockopt(fd, level, opt, unsafe.Pointer(&buf[0]), &vallen)
+        if err != nil {
+                return "", err
+        }
+        return ByteSliceToString(buf[:vallen]), nil
+}
+
+//sys   recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
+//sys   sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
+//sys   recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
+
+func recvmsgRaw(fd int, iov []Iovec, oob []byte, flags int, rsa *RawSockaddrAny) (n, oobn int, recvflags int, err error) {
+        var msg Msghdr
+        msg.Name = (*byte)(unsafe.Pointer(rsa))
+        msg.Namelen = uint32(SizeofSockaddrAny)
+        var dummy byte
+        if len(oob) > 0 {
+                // receive at least one normal byte
+                if emptyIovecs(iov) {
+                        var iova [1]Iovec
+                        iova[0].Base = &dummy
+                        iova[0].SetLen(1)
+                        iov = iova[:]
+                }
+                msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
+                msg.SetControllen(len(oob))
+        }
+        if len(iov) > 0 {
+                msg.Iov = &iov[0]
+                msg.SetIovlen(len(iov))
+        }
+        if n, err = recvmsg(fd, &msg, flags); err != nil {
+                return
+        }
+        oobn = int(msg.Controllen)
+        recvflags = int(msg.Flags)
+        return
+}
+
+//sys   sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
+
+func sendmsgN(fd int, iov []Iovec, oob []byte, ptr unsafe.Pointer, salen _Socklen, flags int) (n int, err error) {
+        var msg Msghdr
+        msg.Name = (*byte)(unsafe.Pointer(ptr))
+        msg.Namelen = uint32(salen)
+        var dummy byte
+        var empty bool
+        if len(oob) > 0 {
+                // send at least one normal byte
+                empty = emptyIovecs(iov)
+                if empty {
+                        var iova [1]Iovec
+                        iova[0].Base = &dummy
+                        iova[0].SetLen(1)
+                        iov = iova[:]
+                }
+                msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
+                msg.SetControllen(len(oob))
+        }
+        if len(iov) > 0 {
+                msg.Iov = &iov[0]
+                msg.SetIovlen(len(iov))
+        }
+        if n, err = sendmsg(fd, &msg, flags); err != nil {
+                return 0, err
+        }
+        if len(oob) > 0 && empty {
+                n = 0
+        }
+        return n, nil
+}
+
+//sys   kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error)
+
+func Kevent(kq int, changes, events []Kevent_t, timeout *Timespec) (n int, err error) {
+        var change, event unsafe.Pointer
+        if len(changes) > 0 {
+                change = unsafe.Pointer(&changes[0])
+        }
+        if len(events) > 0 {
+                event = unsafe.Pointer(&events[0])
+        }
+        return kevent(kq, change, len(changes), event, len(events), timeout)
+}
+
+// sysctlmib translates name to mib number and appends any additional args.
+func sysctlmib(name string, args ...int) ([]_C_int, error) {
+        // Translate name to mib number.
+        mib, err := nametomib(name)
+        if err != nil {
+                return nil, err
+        }
+
+        for _, a := range args {
+                mib = append(mib, _C_int(a))
+        }
+
+        return mib, nil
+}
+
+func Sysctl(name string) (string, error) {
+        return SysctlArgs(name)
+}
+
+func SysctlArgs(name string, args ...int) (string, error) {
+        buf, err := SysctlRaw(name, args...)
+        if err != nil {
+                return "", err
+        }
+        n := len(buf)
+
+        // Throw away terminating NUL.
+        if n > 0 && buf[n-1] == '\x00' {
+                n--
+        }
+        return string(buf[0:n]), nil
+}
+
+func SysctlUint32(name string) (uint32, error) {
+        return SysctlUint32Args(name)
+}
+
+func SysctlUint32Args(name string, args ...int) (uint32, error) {
+        mib, err := sysctlmib(name, args...)
+        if err != nil {
+                return 0, err
+        }
+
+        n := uintptr(4)
+        buf := make([]byte, 4)
+        if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil {
+                return 0, err
+        }
+        if n != 4 {
+                return 0, EIO
+        }
+        return *(*uint32)(unsafe.Pointer(&buf[0])), nil
+}
+
+func SysctlUint64(name string, args ...int) (uint64, error) {
+        mib, err := sysctlmib(name, args...)
+        if err != nil {
+                return 0, err
+        }
+
+        n := uintptr(8)
+        buf := make([]byte, 8)
+        if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil {
+                return 0, err
+        }
+        if n != 8 {
+                return 0, EIO
+        }
+        return *(*uint64)(unsafe.Pointer(&buf[0])), nil
+}
+
+func SysctlRaw(name string, args ...int) ([]byte, error) {
+        mib, err := sysctlmib(name, args...)
+        if err != nil {
+                return nil, err
+        }
+
+        // Find size.
+        n := uintptr(0)
+        if err := sysctl(mib, nil, &n, nil, 0); err != nil {
+                return nil, err
+        }
+        if n == 0 {
+                return nil, nil
+        }
+
+        // Read into buffer of that size.
+        buf := make([]byte, n)
+        if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil {
+                return nil, err
+        }
+
+        // The actual call may return less than the original reported required
+        // size so ensure we deal with that.
+        return buf[:n], nil
+}
+
+func SysctlClockinfo(name string) (*Clockinfo, error) {
+        mib, err := sysctlmib(name)
+        if err != nil {
+                return nil, err
+        }
+
+        n := uintptr(SizeofClockinfo)
+        var ci Clockinfo
+        if err := sysctl(mib, (*byte)(unsafe.Pointer(&ci)), &n, nil, 0); err != nil {
+                return nil, err
+        }
+        if n != SizeofClockinfo {
+                return nil, EIO
+        }
+        return &ci, nil
+}
+
+func SysctlTimeval(name string) (*Timeval, error) {
+        mib, err := sysctlmib(name)
+        if err != nil {
+                return nil, err
+        }
+
+        var tv Timeval
+        n := uintptr(unsafe.Sizeof(tv))
+        if err := sysctl(mib, (*byte)(unsafe.Pointer(&tv)), &n, nil, 0); err != nil {
+                return nil, err
+        }
+        if n != unsafe.Sizeof(tv) {
+                return nil, EIO
+        }
+        return &tv, nil
+}
+
+//sys   utimes(path string, timeval *[2]Timeval) (err error)
+
+func Utimes(path string, tv []Timeval) error {
+        if tv == nil {
+                return utimes(path, nil)
+        }
+        if len(tv) != 2 {
+                return EINVAL
+        }
+        return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+func UtimesNano(path string, ts []Timespec) error {
+        if ts == nil {
+                err := utimensat(AT_FDCWD, path, nil, 0)
+                if err != ENOSYS {
+                        return err
+                }
+                return utimes(path, nil)
+        }
+        if len(ts) != 2 {
+                return EINVAL
+        }
+        err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
+        if err != ENOSYS {
+                return err
+        }
+        // Not as efficient as it could be because Timespec and
+        // Timeval have different types in the different OSes
+        tv := [2]Timeval{
+                NsecToTimeval(TimespecToNsec(ts[0])),
+                NsecToTimeval(TimespecToNsec(ts[1])),
+        }
+        return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {
+        if ts == nil {
+                return utimensat(dirfd, path, nil, flags)
+        }
+        if len(ts) != 2 {
+                return EINVAL
+        }
+        return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
+}
+
+//sys   futimes(fd int, timeval *[2]Timeval) (err error)
+
+func Futimes(fd int, tv []Timeval) error {
+        if tv == nil {
+                return futimes(fd, nil)
+        }
+        if len(tv) != 2 {
+                return EINVAL
+        }
+        return futimes(fd, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+//sys   poll(fds *PollFd, nfds int, timeout int) (n int, err error)
+
+func Poll(fds []PollFd, timeout int) (n int, err error) {
+        if len(fds) == 0 {
+                return poll(nil, 0, timeout)
+        }
+        return poll(&fds[0], len(fds), timeout)
+}
+
+// TODO: wrap
+//      Acct(name nil-string) (err error)
+//      Gethostuuid(uuid *byte, timeout *Timespec) (err error)
+//      Ptrace(req int, pid int, addr uintptr, data int) (ret uintptr, err error)
+
+//sys   Madvise(b []byte, behav int) (err error)
+//sys   Mlock(b []byte) (err error)
+//sys   Mlockall(flags int) (err error)
+//sys   Mprotect(b []byte, prot int) (err error)
+//sys   Msync(b []byte, flags int) (err error)
+//sys   Munlock(b []byte) (err error)
+//sys   Munlockall() (err error)