diff options
author | Emile <git@emile.space> | 2024-10-25 15:55:50 +0200 |
---|---|---|
committer | Emile <git@emile.space> | 2024-10-25 15:55:50 +0200 |
commit | c90f36e3dd179d2de96f4f5fe38d8dc9a9de6dfe (patch) | |
tree | 89e9afb41c5bf76f48cfb09305a2d3db8d302b06 /vendor/golang.org/x/sys/unix/syscall_bsd.go | |
parent | 98bbb0f559a8883bc47bae80607dbe326a448e61 (diff) |
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_bsd.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_bsd.go | 609 |
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) |