From 73df946d56c74384511a194dd01dbe099584fd1a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:14:23 +0200 Subject: Adding upstream version 1.16.10. Signed-off-by: Daniel Baumann --- src/syscall/syscall_bsd.go | 567 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 567 insertions(+) create mode 100644 src/syscall/syscall_bsd.go (limited to 'src/syscall/syscall_bsd.go') diff --git a/src/syscall/syscall_bsd.go b/src/syscall/syscall_bsd.go new file mode 100644 index 0000000..1c7ec58 --- /dev/null +++ b/src/syscall/syscall_bsd.go @@ -0,0 +1,567 @@ +// 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. + +// +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 syscall + +import ( + "runtime" + "unsafe" +) + +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) + for i := 0; i < len(sa.Addr); i++ { + sa.raw.Addr[i] = sa.Addr[i] + } + 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 + for i := 0; i < len(sa.Addr); i++ { + sa.raw.Addr[i] = sa.Addr[i] + } + 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 + for i := 0; i < len(sa.raw.Data); i++ { + sa.raw.Data[i] = sa.Data[i] + } + 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 + for i := 0; i < len(sa.Data); i++ { + sa.Data[i] = pp.Data[i] + } + 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 + } + } + bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] + sa.Name = string(bytes) + 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]) + for i := 0; i < len(sa.Addr); i++ { + sa.Addr[i] = pp.Addr[i] + } + 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 + for i := 0; i < len(sa.Addr); i++ { + sa.Addr[i] = pp.Addr[i] + } + 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 Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { + var msg Msghdr + var rsa RawSockaddrAny + msg.Name = (*byte)(unsafe.Pointer(&rsa)) + msg.Namelen = uint32(SizeofSockaddrAny) + var iov Iovec + if len(p) > 0 { + iov.Base = (*byte)(unsafe.Pointer(&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 = (*byte)(unsafe.Pointer(&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) + // source address is only specified if the socket is unconnected + if rsa.Addr.Family != AF_UNSPEC { + from, err = anyToSockaddr(&rsa) + } + return +} + +//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) + +func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { + _, err = SendmsgN(fd, p, oob, to, flags) + return +} + +func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { + var ptr unsafe.Pointer + var salen _Socklen + if to != nil { + ptr, salen, err = to.sockaddr() + if err != nil { + return 0, err + } + } + var msg Msghdr + msg.Name = (*byte)(unsafe.Pointer(ptr)) + msg.Namelen = uint32(salen) + var iov Iovec + if len(p) > 0 { + iov.Base = (*byte)(unsafe.Pointer(&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 = (*byte)(unsafe.Pointer(&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 + } + // Darwin setattrlist can set nanosecond timestamps + err := setattrlistTimes(path, ts) + if err != ENOSYS { + return err + } + 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) + +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) +} -- cgit v1.2.3