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path: root/src/pkg/syscall/syscall_bsd.go
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-rw-r--r--src/pkg/syscall/syscall_bsd.go627
1 files changed, 627 insertions, 0 deletions
diff --git a/src/pkg/syscall/syscall_bsd.go b/src/pkg/syscall/syscall_bsd.go
new file mode 100644
index 000000000..f59e8b109
--- /dev/null
+++ b/src/pkg/syscall/syscall_bsd.go
@@ -0,0 +1,627 @@
+// 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.
+
+// 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 "unsafe"
+
+/*
+ * Pseudo-system calls
+ */
+// The const provides a compile-time constant so clients
+// can adjust to whether there is a working Getwd and avoid
+// even linking this function into the binary. See ../os/getwd.go.
+const ImplementsGetwd = false
+
+func Getwd() (string, int) { return "", ENOTSUP }
+
+/*
+ * Wrapped
+ */
+
+//sysnb getgroups(ngid int, gid *_Gid_t) (n int, errno int)
+//sysnb setgroups(ngid int, gid *_Gid_t) (errno int)
+
+func Getgroups() (gids []int, errno int) {
+ n, err := getgroups(0, nil)
+ if err != 0 {
+ return nil, errno
+ }
+ if n == 0 {
+ return nil, 0
+ }
+
+ // 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 != 0 {
+ return nil, errno
+ }
+ gids = make([]int, n)
+ for i, v := range a[0:n] {
+ gids[i] = int(v)
+ }
+ return
+}
+
+func Setgroups(gids []int) (errno int) {
+ 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, errno int) {
+ // Final argument is (basep *uintptr) and the syscall doesn't take nil.
+ // TODO(rsc): Can we use a single global basep for all calls?
+ return Getdirentries(fd, buf, new(uintptr))
+}
+
+// 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() int {
+ sig := int(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 && w>>shift != SIGSTOP }
+
+func (w WaitStatus) Continued() bool { return w&mask == stopped && w>>shift == SIGSTOP }
+
+func (w WaitStatus) StopSignal() int {
+ if !w.Stopped() {
+ return -1
+ }
+ return int(w>>shift) & 0xFF
+}
+
+func (w WaitStatus) TrapCause() int { return -1 }
+
+//sys wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, errno int)
+
+func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, errno int) {
+ var status _C_int
+ wpid, errno = wait4(pid, &status, options, rusage)
+ if wstatus != nil {
+ *wstatus = WaitStatus(status)
+ }
+ return
+}
+
+func Sleep(ns int64) (errno int) {
+ tv := NsecToTimeval(ns)
+ return Select(0, nil, nil, nil, &tv)
+}
+
+//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, errno int)
+//sys bind(s int, addr uintptr, addrlen _Socklen) (errno int)
+//sys connect(s int, addr uintptr, addrlen _Socklen) (errno int)
+//sysnb socket(domain int, typ int, proto int) (fd int, errno int)
+//sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
+//sys setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int)
+//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
+//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
+//sys Shutdown(s int, how int) (errno int)
+
+// For testing: clients can set this flag to force
+// creation of IPv6 sockets to return EAFNOSUPPORT.
+var SocketDisableIPv6 bool
+
+type Sockaddr interface {
+ sockaddr() (ptr uintptr, len _Socklen, errno int) // lowercase; only we can define Sockaddrs
+}
+
+type SockaddrInet4 struct {
+ Port int
+ Addr [4]byte
+ raw RawSockaddrInet4
+}
+
+func (sa *SockaddrInet4) sockaddr() (uintptr, _Socklen, int) {
+ if sa.Port < 0 || sa.Port > 0xFFFF {
+ return 0, 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 uintptr(unsafe.Pointer(&sa.raw)), _Socklen(sa.raw.Len), 0
+}
+
+type SockaddrInet6 struct {
+ Port int
+ ZoneId uint32
+ Addr [16]byte
+ raw RawSockaddrInet6
+}
+
+func (sa *SockaddrInet6) sockaddr() (uintptr, _Socklen, int) {
+ if sa.Port < 0 || sa.Port > 0xFFFF {
+ return 0, 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 uintptr(unsafe.Pointer(&sa.raw)), _Socklen(sa.raw.Len), 0
+}
+
+type SockaddrUnix struct {
+ Name string
+ raw RawSockaddrUnix
+}
+
+func (sa *SockaddrUnix) sockaddr() (uintptr, _Socklen, int) {
+ name := sa.Name
+ n := len(name)
+ if n >= len(sa.raw.Path) || n == 0 {
+ return 0, 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 uintptr(unsafe.Pointer(&sa.raw)), _Socklen(sa.raw.Len), 0
+}
+
+func (sa *SockaddrDatalink) sockaddr() (uintptr, _Socklen, int) {
+ if sa.Index == 0 {
+ return 0, 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 uintptr(unsafe.Pointer(&sa.raw)), SizeofSockaddrDatalink, 0
+}
+
+func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, int) {
+ 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, 0
+
+ case AF_UNIX:
+ pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
+ if pp.Len < 3 || pp.Len > SizeofSockaddrUnix {
+ return nil, EINVAL
+ }
+ sa := new(SockaddrUnix)
+ n := int(pp.Len) - 3 // subtract leading Family, Len, terminating NUL
+ for i := 0; i < n; i++ {
+ if pp.Path[i] == 0 {
+ // found early NUL; assume Len is overestimating
+ n = i
+ break
+ }
+ }
+ bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+ sa.Name = string(bytes)
+ return sa, 0
+
+ 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, 0
+
+ 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, 0
+ }
+ return nil, EAFNOSUPPORT
+}
+
+func Accept(fd int) (nfd int, sa Sockaddr, errno int) {
+ var rsa RawSockaddrAny
+ var len _Socklen = SizeofSockaddrAny
+ nfd, errno = accept(fd, &rsa, &len)
+ if errno != 0 {
+ return
+ }
+ sa, errno = anyToSockaddr(&rsa)
+ if errno != 0 {
+ Close(nfd)
+ nfd = 0
+ }
+ return
+}
+
+func Getsockname(fd int) (sa Sockaddr, errno int) {
+ var rsa RawSockaddrAny
+ var len _Socklen = SizeofSockaddrAny
+ if errno = getsockname(fd, &rsa, &len); errno != 0 {
+ return
+ }
+ return anyToSockaddr(&rsa)
+}
+
+func Getpeername(fd int) (sa Sockaddr, errno int) {
+ var rsa RawSockaddrAny
+ var len _Socklen = SizeofSockaddrAny
+ if errno = getpeername(fd, &rsa, &len); errno != 0 {
+ return
+ }
+ return anyToSockaddr(&rsa)
+}
+
+func Bind(fd int, sa Sockaddr) (errno int) {
+ ptr, n, err := sa.sockaddr()
+ if err != 0 {
+ return err
+ }
+ return bind(fd, ptr, n)
+}
+
+func Connect(fd int, sa Sockaddr) (errno int) {
+ ptr, n, err := sa.sockaddr()
+ if err != 0 {
+ return err
+ }
+ return connect(fd, ptr, n)
+}
+
+func Socket(domain, typ, proto int) (fd, errno int) {
+ if domain == AF_INET6 && SocketDisableIPv6 {
+ return -1, EAFNOSUPPORT
+ }
+ fd, errno = socket(domain, typ, proto)
+ return
+}
+
+//sysnb socketpair(domain int, typ int, proto int, fd *[2]int) (errno int)
+
+func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
+ errno = socketpair(domain, typ, proto, &fd)
+ return
+}
+
+func GetsockoptInt(fd, level, opt int) (value, errno int) {
+ var n int32
+ vallen := _Socklen(4)
+ errno = getsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), &vallen)
+ return int(n), errno
+}
+
+func SetsockoptInt(fd, level, opt int, value int) (errno int) {
+ var n = int32(value)
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), 4)
+}
+
+func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (errno int) {
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(tv)), unsafe.Sizeof(*tv))
+}
+
+func SetsockoptLinger(fd, level, opt int, l *Linger) (errno int) {
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(l)), unsafe.Sizeof(*l))
+}
+
+func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (errno int) {
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(mreq)), unsafe.Sizeof(*mreq))
+}
+
+func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (errno int) {
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(mreq)), unsafe.Sizeof(*mreq))
+}
+
+func SetsockoptString(fd, level, opt int, s string) (errno int) {
+ return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&[]byte(s)[0])), uintptr(len(s)))
+}
+
+//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, errno int)
+
+func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, errno int) {
+ var rsa RawSockaddrAny
+ var len _Socklen = SizeofSockaddrAny
+ if n, errno = recvfrom(fd, p, flags, &rsa, &len); errno != 0 {
+ return
+ }
+ from, errno = anyToSockaddr(&rsa)
+ return
+}
+
+//sys sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (errno int)
+
+func Sendto(fd int, p []byte, flags int, to Sockaddr) (errno int) {
+ ptr, n, err := to.sockaddr()
+ if err != 0 {
+ return err
+ }
+ return sendto(fd, p, flags, ptr, n)
+}
+
+//sys recvmsg(s int, msg *Msghdr, flags int) (n int, errno int)
+
+func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, errno int) {
+ 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, errno = recvmsg(fd, &msg, flags); errno != 0 {
+ 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, errno = anyToSockaddr(&rsa)
+ }
+ return
+}
+
+//sys sendmsg(s int, msg *Msghdr, flags int) (errno int)
+
+func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (errno int) {
+ var ptr uintptr
+ var salen _Socklen
+ if to != nil {
+ var err int
+ ptr, salen, err = to.sockaddr()
+ if err != 0 {
+ return 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 errno = sendmsg(fd, &msg, flags); errno != 0 {
+ return
+ }
+ return
+}
+
+// TODO:
+// FreeBSD has IP_SENDIF. Darwin probably needs BSDLLCTest, see:
+// http://developer.apple.com/mac/library/samplecode/BSDLLCTest/index.html
+
+// BindToDevice binds the socket associated with fd to device.
+func BindToDevice(fd int, device string) (errno int) {
+ return ENOSYS
+}
+
+//sys kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, errno int)
+
+func Kevent(kq int, changes, events []Kevent_t, timeout *Timespec) (n int, errno int) {
+ var change, event uintptr
+ if len(changes) > 0 {
+ change = uintptr(unsafe.Pointer(&changes[0]))
+ }
+ if len(events) > 0 {
+ event = uintptr(unsafe.Pointer(&events[0]))
+ }
+ return kevent(kq, change, len(changes), event, len(events), timeout)
+}
+
+//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (errno int) = SYS___SYSCTL
+
+// Translate "kern.hostname" to []_C_int{0,1,2,3}.
+func nametomib(name string) (mib []_C_int, errno int) {
+ const siz = unsafe.Sizeof(mib[0])
+
+ // NOTE(rsc): It seems strange to set the buffer to have
+ // size CTL_MAXNAME+2 but use only CTL_MAXNAME
+ // as the size. I don't know why the +2 is here, but the
+ // kernel uses +2 for its own implementation of this function.
+ // I am scared that if we don't include the +2 here, the kernel
+ // will silently write 2 words farther than we specify
+ // and we'll get memory corruption.
+ var buf [CTL_MAXNAME + 2]_C_int
+ n := uintptr(CTL_MAXNAME) * siz
+
+ p := (*byte)(unsafe.Pointer(&buf[0]))
+ bytes := StringByteSlice(name)
+
+ // Magic sysctl: "setting" 0.3 to a string name
+ // lets you read back the array of integers form.
+ if errno = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); errno != 0 {
+ return nil, errno
+ }
+ return buf[0 : n/siz], 0
+}
+
+func Sysctl(name string) (value string, errno int) {
+ // Translate name to mib number.
+ mib, errno := nametomib(name)
+ if errno != 0 {
+ return "", errno
+ }
+
+ // Find size.
+ n := uintptr(0)
+ if errno = sysctl(mib, nil, &n, nil, 0); errno != 0 {
+ return "", errno
+ }
+ if n == 0 {
+ return "", 0
+ }
+
+ // Read into buffer of that size.
+ buf := make([]byte, n)
+ if errno = sysctl(mib, &buf[0], &n, nil, 0); errno != 0 {
+ return "", errno
+ }
+
+ // Throw away terminating NUL.
+ if n > 0 && buf[n-1] == '\x00' {
+ n--
+ }
+ return string(buf[0:n]), 0
+}
+
+func SysctlUint32(name string) (value uint32, errno int) {
+ // Translate name to mib number.
+ mib, errno := nametomib(name)
+ if errno != 0 {
+ return 0, errno
+ }
+
+ // Read into buffer of that size.
+ n := uintptr(4)
+ buf := make([]byte, 4)
+ if errno = sysctl(mib, &buf[0], &n, nil, 0); errno != 0 {
+ return 0, errno
+ }
+ if n != 4 {
+ return 0, EIO
+ }
+ return *(*uint32)(unsafe.Pointer(&buf[0])), 0
+}
+
+//sys utimes(path string, timeval *[2]Timeval) (errno int)
+func Utimes(path string, tv []Timeval) (errno int) {
+ if len(tv) != 2 {
+ return EINVAL
+ }
+ return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
+}
+
+//sys futimes(fd int, timeval *[2]Timeval) (errno int)
+func Futimes(fd int, tv []Timeval) (errno int) {
+ 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, errno int)
+
+// TODO: wrap
+// Acct(name nil-string) (errno int)
+// Gethostuuid(uuid *byte, timeout *Timespec) (errno int)
+// Madvise(addr *byte, len int, behav int) (errno int)
+// Mprotect(addr *byte, len int, prot int) (errno int)
+// Msync(addr *byte, len int, flags int) (errno int)
+// Ptrace(req int, pid int, addr uintptr, data int) (ret uintptr, errno int)
+
+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, errno int) {
+ return mapper.Mmap(fd, offset, length, prot, flags)
+}
+
+func Munmap(b []byte) (errno int) {
+ return mapper.Munmap(b)
+}