From 5246526aa145b5306b0971e2460631f0a22c9345 Mon Sep 17 00:00:00 2001
From: Martin Stiemerling <martin.stiemerling@h-da.de>
Date: Tue, 3 Sep 2024 16:25:02 +0200
Subject: [PATCH] removed freebsd compile flag from syscall_bsd.go and copied
code to syscall_freebsd.go, extended code in syscall_freebsd.go for netlink.
---
src/syscall/syscall_bsd.go | 2 +-
src/syscall/syscall_freebsd.go | 550 ++++++++++++++++++++++++++++++++-
2 files changed, 550 insertions(+), 2 deletions(-)
diff --git a/src/syscall/syscall_bsd.go b/src/syscall/syscall_bsd.go
index 233c6b21dcf..f5ea418db9b 100644
--- a/src/syscall/syscall_bsd.go
+++ b/src/syscall/syscall_bsd.go
@@ -2,7 +2,7 @@
// 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
+//go:build darwin || dragonfly || netbsd || openbsd
// BSD system call wrappers shared by *BSD based systems
// including OS X (Darwin) and FreeBSD. Like the other
diff --git a/src/syscall/syscall_freebsd.go b/src/syscall/syscall_freebsd.go
index 584522d2888..d23a3a57940 100644
--- a/src/syscall/syscall_freebsd.go
+++ b/src/syscall/syscall_freebsd.go
@@ -12,7 +12,10 @@
package syscall
-import "unsafe"
+import (
+ "runtime"
+ "unsafe"
+)
func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
@@ -31,6 +34,25 @@ type SockaddrDatalink struct {
raw RawSockaddrDatalink
}
+// Copied from syscall_linux.go
+type SockaddrNetlink struct {
+ Family uint8
+ Pad uint16
+ Pid uint32
+ Groups uint32
+ raw RawSockaddrNetlink
+}
+
+// End of copied from syscall_linux.go
+
+func (sa *SockaddrNetlink) sockaddr() (unsafe.Pointer, _Socklen, error) {
+ sa.raw.Family = AF_NETLINK
+ sa.raw.Pad = sa.Pad
+ sa.raw.Pid = sa.Pid
+ sa.raw.Groups = sa.Groups
+ return unsafe.Pointer(&sa.raw), SizeofSockaddrNetlink, nil
+}
+
// 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])
@@ -166,6 +188,532 @@ func Mknod(path string, mode uint32, dev uint64) (err error) {
return mknodat(_AT_FDCWD, path, mode, dev)
}
+const ImplementsGetwd = true
+
+func Getwd() (string, error) {
+ var buf [pathMax]byte
+ _, err := getcwd(buf[:])
+ 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])
+}
+
+func ReadDirent(fd int, buf []byte) (n int, err error) {
+ // Final argument is (basep *uintptr) and the syscall doesn't take nil.
+ // 64 bits should be enough. (32 bits isn't even on 386). Since the
+ // actual system call is getdirentries64, 64 is a good guess.
+ // TODO(rsc): Can we use a single global basep for all calls?
+ var base = (*uintptr)(unsafe.Pointer(new(uint64)))
+ return Getdirentries(fd, buf, base)
+}
+
+// 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
+ 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() Signal {
+ sig := 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 && Signal(w>>shift) != SIGSTOP }
+
+func (w WaitStatus) Continued() bool { return w&mask == stopped && Signal(w>>shift) == SIGSTOP }
+
+func (w WaitStatus) StopSignal() Signal {
+ if !w.Stopped() {
+ return -1
+ }
+ return 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(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
+
+ case AF_NETLINK:
+ pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa))
+ sa := new(SockaddrNetlink)
+ sa.Family = pp.Family
+ sa.Pad = pp.Pad
+ sa.Pid = pp.Pid
+ sa.Groups = pp.Groups
+ return sa, nil
+ }
+
+ return nil, EAFNOSUPPORT
+}
+
+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(&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(&rsa)
+}
+
+//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
+
+func GetsockoptByte(fd, level, opt int) (value byte, err error) {
+ var n byte
+ vallen := _Socklen(1)
+ err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
+ return n, err
+}
+
+func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) {
+ vallen := _Socklen(4)
+ err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen)
+ return value, err
+}
+
+func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) {
+ var value IPMreq
+ vallen := _Socklen(SizeofIPMreq)
+ err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
+ return &value, err
+}
+
+func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) {
+ var value IPv6Mreq
+ vallen := _Socklen(SizeofIPv6Mreq)
+ err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
+ return &value, err
+}
+
+func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) {
+ var value IPv6MTUInfo
+ vallen := _Socklen(SizeofIPv6MTUInfo)
+ err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
+ return &value, err
+}
+
+func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) {
+ var value ICMPv6Filter
+ vallen := _Socklen(SizeofICMPv6Filter)
+ err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
+ return &value, err
+}
+
+//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, p, 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 iov Iovec
+ if len(p) > 0 {
+ iov.Base = &p[0]
+ iov.SetLen(len(p))
+ }
+ var dummy byte
+ if len(oob) > 0 {
+ // receive at least one normal byte
+ if len(p) == 0 {
+ iov.Base = &dummy
+ iov.SetLen(1)
+ }
+ msg.Control = &oob[0]
+ msg.SetControllen(len(oob))
+ }
+ msg.Iov = &iov
+ msg.Iovlen = 1
+ 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, p, oob []byte, ptr unsafe.Pointer, salen _Socklen, flags int) (n int, err error) {
+ var msg Msghdr
+ msg.Name = (*byte)(ptr)
+ msg.Namelen = uint32(salen)
+ var iov Iovec
+ if len(p) > 0 {
+ iov.Base = &p[0]
+ iov.SetLen(len(p))
+ }
+ var dummy byte
+ if len(oob) > 0 {
+ // send at least one normal byte
+ if len(p) == 0 {
+ iov.Base = &dummy
+ iov.SetLen(1)
+ }
+ msg.Control = &oob[0]
+ msg.SetControllen(len(oob))
+ }
+ msg.Iov = &iov
+ msg.Iovlen = 1
+ if n, err = sendmsg(fd, &msg, flags); err != nil {
+ return 0, err
+ }
+ if len(oob) > 0 && len(p) == 0 {
+ 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)
+}
+
+func Sysctl(name string) (value string, err error) {
+ // Translate name to mib number.
+ mib, err := nametomib(name)
+ if err != nil {
+ return "", err
+ }
+
+ // Find size.
+ n := uintptr(0)
+ if err = sysctl(mib, nil, &n, nil, 0); err != nil {
+ return "", err
+ }
+ if n == 0 {
+ return "", nil
+ }
+
+ // Read into buffer of that size.
+ buf := make([]byte, n)
+ if err = sysctl(mib, &buf[0], &n, nil, 0); err != nil {
+ return "", err
+ }
+
+ // Throw away terminating NUL.
+ if n > 0 && buf[n-1] == '\x00' {
+ n--
+ }
+ return string(buf[0:n]), nil
+}
+
+func SysctlUint32(name string) (value uint32, err error) {
+ // Translate name to mib number.
+ mib, err := nametomib(name)
+ if err != nil {
+ return 0, err
+ }
+
+ // Read into buffer of that size.
+ 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
+}
+
+//sys utimes(path string, timeval *[2]Timeval) (err error)
+
+func Utimes(path string, tv []Timeval) (err error) {
+ if len(tv) != 2 {
+ return EINVAL
+ }
+ return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+func UtimesNano(path string, ts []Timespec) error {
+ 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])))
+}
+
+//sys futimes(fd int, timeval *[2]Timeval) (err error)
+
+func Futimes(fd int, tv []Timeval) (err error) {
+ if len(tv) != 2 {
+ return EINVAL
+ }
+ return futimes(fd, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+//sys fcntl(fd int, cmd int, arg int) (val int, err error)
+//sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_FCNTL
+//sysnb ioctl(fd int, req int, arg int) (err error)
+//sysnb ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL
+
+var mapper = &mmapper{
+ active: make(map[*byte][]byte),
+ mmap: mmap,
+ munmap: munmap,
+}
+
+func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
+ return mapper.Mmap(fd, offset, length, prot, flags)
+}
+
+func Munmap(b []byte) (err error) {
+ return mapper.Munmap(b)
+}
+
/*
* Exposed directly
*/
--
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