diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_solaris.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_solaris.go | 1104 |
1 files changed, 1104 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_solaris.go b/vendor/golang.org/x/sys/unix/syscall_solaris.go new file mode 100644 index 0000000..21974af --- /dev/null +++ b/vendor/golang.org/x/sys/unix/syscall_solaris.go @@ -0,0 +1,1104 @@ +// 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. + +// Solaris system calls. +// This file is compiled as ordinary Go code, +// but it is also input to mksyscall, +// which parses the //sys lines and generates system call stubs. +// Note that sometimes we use a lowercase //sys name and wrap +// it in our own nicer implementation, either here or in +// syscall_solaris.go or syscall_unix.go. + +package unix + +import ( + "fmt" + "os" + "runtime" + "sync" + "syscall" + "unsafe" +) + +// Implemented in runtime/syscall_solaris.go. +type syscallFunc uintptr + +func rawSysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) +func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) + +// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. +type SockaddrDatalink struct { + Family uint16 + Index uint16 + Type uint8 + Nlen uint8 + Alen uint8 + Slen uint8 + Data [244]int8 + raw RawSockaddrDatalink +} + +func direntIno(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) +} + +func direntReclen(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) +} + +func direntNamlen(buf []byte) (uint64, bool) { + reclen, ok := direntReclen(buf) + if !ok { + return 0, false + } + return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true +} + +//sysnb pipe(p *[2]_C_int) (n int, err error) + +func Pipe(p []int) (err error) { + if len(p) != 2 { + return EINVAL + } + var pp [2]_C_int + n, err := pipe(&pp) + if n != 0 { + return err + } + if err == nil { + p[0] = int(pp[0]) + p[1] = int(pp[1]) + } + return nil +} + +//sysnb pipe2(p *[2]_C_int, flags int) (err error) + +func Pipe2(p []int, flags int) error { + if len(p) != 2 { + return EINVAL + } + var pp [2]_C_int + err := pipe2(&pp, flags) + if err == nil { + p[0] = int(pp[0]) + p[1] = int(pp[1]) + } + return err +} + +func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { + if sa.Port < 0 || sa.Port > 0xFFFF { + return nil, 0, EINVAL + } + 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), SizeofSockaddrInet4, nil +} + +func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { + if sa.Port < 0 || sa.Port > 0xFFFF { + return nil, 0, EINVAL + } + 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), SizeofSockaddrInet6, nil +} + +func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { + name := sa.Name + n := len(name) + if n >= len(sa.raw.Path) { + return nil, 0, EINVAL + } + sa.raw.Family = AF_UNIX + for i := 0; i < n; i++ { + sa.raw.Path[i] = int8(name[i]) + } + // length is family (uint16), name, NUL. + sl := _Socklen(2) + if n > 0 { + sl += _Socklen(n) + 1 + } + if sa.raw.Path[0] == '@' || (sa.raw.Path[0] == 0 && sl > 3) { + // Check sl > 3 so we don't change unnamed socket behavior. + sa.raw.Path[0] = 0 + // Don't count trailing NUL for abstract address. + sl-- + } + + return unsafe.Pointer(&sa.raw), sl, nil +} + +//sys getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getsockname + +func Getsockname(fd int) (sa Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + if err = getsockname(fd, &rsa, &len); err != nil { + return + } + return anyToSockaddr(fd, &rsa) +} + +// 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 +} + +const ImplementsGetwd = true + +//sys Getcwd(buf []byte) (n int, err error) + +func Getwd() (wd string, err error) { + var buf [PathMax]byte + // Getcwd will return an error if it failed for any reason. + _, 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) + // Check for error and sanity check group count. Newer versions of + // Solaris allow up to 1024 (NGROUPS_MAX). + if n < 0 || n > 1024 { + if err != nil { + return nil, err + } + return nil, EINVAL + } else if n == 0 { + return nil, nil + } + + a := make([]_Gid_t, n) + n, err = getgroups(n, &a[0]) + if n == -1 { + 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]) +} + +// ReadDirent reads directory entries from fd and writes them into buf. +func ReadDirent(fd int, buf []byte) (n int, err error) { + // 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 Getdents(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() 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) 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 int32, statusp *_C_int, options int, rusage *Rusage) (wpid int32, err error) + +func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (int, error) { + var status _C_int + rpid, err := wait4(int32(pid), &status, options, rusage) + wpid := int(rpid) + if wpid == -1 { + return wpid, err + } + if wstatus != nil { + *wstatus = WaitStatus(status) + } + return wpid, nil +} + +//sys gethostname(buf []byte) (n int, err error) + +func Gethostname() (name string, err error) { + var buf [MaxHostNameLen]byte + n, err := gethostname(buf[:]) + if n != 0 { + return "", err + } + n = clen(buf[:]) + if n < 1 { + return "", EFAULT + } + return string(buf[:n]), nil +} + +//sys utimes(path string, times *[2]Timeval) (err error) + +func Utimes(path string, tv []Timeval) (err error) { + if tv == nil { + return utimes(path, nil) + } + if len(tv) != 2 { + return EINVAL + } + return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) +} + +//sys utimensat(fd int, path string, times *[2]Timespec, flag int) (err error) + +func UtimesNano(path string, ts []Timespec) error { + if ts == nil { + return utimensat(AT_FDCWD, path, nil, 0) + } + if len(ts) != 2 { + return EINVAL + } + return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 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 fcntl(fd int, cmd int, arg int) (val int, err error) + +// FcntlInt performs a fcntl syscall on fd with the provided command and argument. +func FcntlInt(fd uintptr, cmd, arg int) (int, error) { + valptr, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0) + var err error + if errno != 0 { + err = errno + } + return int(valptr), err +} + +// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. +func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { + _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(unsafe.Pointer(lk)), 0, 0, 0) + if e1 != 0 { + return e1 + } + return nil +} + +//sys futimesat(fildes int, path *byte, times *[2]Timeval) (err error) + +func Futimesat(dirfd int, path string, tv []Timeval) error { + pathp, err := BytePtrFromString(path) + if err != nil { + return err + } + if tv == nil { + return futimesat(dirfd, pathp, nil) + } + if len(tv) != 2 { + return EINVAL + } + return futimesat(dirfd, pathp, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) +} + +// Solaris doesn't have an futimes function because it allows NULL to be +// specified as the path for futimesat. However, Go doesn't like +// NULL-style string interfaces, so this simple wrapper is provided. +func Futimes(fd int, tv []Timeval) error { + if tv == nil { + return futimesat(fd, nil, nil) + } + if len(tv) != 2 { + return EINVAL + } + return futimesat(fd, nil, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) +} + +func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { + switch rsa.Addr.Family { + case AF_UNIX: + pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) + sa := new(SockaddrUnix) + // Assume path ends at NUL. + // This is not technically the Solaris semantics for + // abstract Unix domain sockets -- they are supposed + // to be uninterpreted fixed-size binary blobs -- but + // everyone uses this convention. + n := 0 + for n < len(pp.Path) && pp.Path[n] != 0 { + n++ + } + 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 nil, EAFNOSUPPORT +} + +//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = libsocket.accept + +func Accept(fd int) (nfd int, sa Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + nfd, err = accept(fd, &rsa, &len) + if nfd == -1 { + return + } + sa, err = anyToSockaddr(fd, &rsa) + if err != nil { + Close(nfd) + nfd = 0 + } + return +} + +//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.__xnet_recvmsg + +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.Accrightslen = int32(len(oob)) + } + if len(iov) > 0 { + msg.Iov = &iov[0] + msg.SetIovlen(len(iov)) + } + if n, err = recvmsg(fd, &msg, flags); n == -1 { + return + } + oobn = int(msg.Accrightslen) + return +} + +//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.__xnet_sendmsg + +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.Accrightslen = int32(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 acct(path *byte) (err error) + +func Acct(path string) (err error) { + if len(path) == 0 { + // Assume caller wants to disable accounting. + return acct(nil) + } + + pathp, err := BytePtrFromString(path) + if err != nil { + return err + } + return acct(pathp) +} + +//sys __makedev(version int, major uint, minor uint) (val uint64) + +func Mkdev(major, minor uint32) uint64 { + return __makedev(NEWDEV, uint(major), uint(minor)) +} + +//sys __major(version int, dev uint64) (val uint) + +func Major(dev uint64) uint32 { + return uint32(__major(NEWDEV, dev)) +} + +//sys __minor(version int, dev uint64) (val uint) + +func Minor(dev uint64) uint32 { + return uint32(__minor(NEWDEV, dev)) +} + +/* + * Expose the ioctl function + */ + +//sys ioctlRet(fd int, req int, arg uintptr) (ret int, err error) = libc.ioctl +//sys ioctlPtrRet(fd int, req int, arg unsafe.Pointer) (ret int, err error) = libc.ioctl + +func ioctl(fd int, req int, arg uintptr) (err error) { + _, err = ioctlRet(fd, req, arg) + return err +} + +func ioctlPtr(fd int, req int, arg unsafe.Pointer) (err error) { + _, err = ioctlPtrRet(fd, req, arg) + return err +} + +func IoctlSetTermio(fd int, req int, value *Termio) error { + return ioctlPtr(fd, req, unsafe.Pointer(value)) +} + +func IoctlGetTermio(fd int, req int) (*Termio, error) { + var value Termio + err := ioctlPtr(fd, req, unsafe.Pointer(&value)) + return &value, err +} + +//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) +} + +func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + return sendfile(outfd, infd, offset, count) +} + +/* + * Exposed directly + */ +//sys Access(path string, mode uint32) (err error) +//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) +//sys Chdir(path string) (err error) +//sys Chmod(path string, mode uint32) (err error) +//sys Chown(path string, uid int, gid int) (err error) +//sys Chroot(path string) (err error) +//sys ClockGettime(clockid int32, time *Timespec) (err error) +//sys Close(fd int) (err error) +//sys Creat(path string, mode uint32) (fd int, err error) +//sys Dup(fd int) (nfd int, err error) +//sys Dup2(oldfd int, newfd int) (err error) +//sys Exit(code int) +//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) +//sys Fchdir(fd int) (err error) +//sys Fchmod(fd int, mode uint32) (err error) +//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) +//sys Fchown(fd int, uid int, gid int) (err error) +//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) +//sys Fdatasync(fd int) (err error) +//sys Flock(fd int, how int) (err error) +//sys Fpathconf(fd int, name int) (val int, err error) +//sys Fstat(fd int, stat *Stat_t) (err error) +//sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) +//sys Fstatvfs(fd int, vfsstat *Statvfs_t) (err error) +//sys Getdents(fd int, buf []byte, basep *uintptr) (n int, err error) +//sysnb Getgid() (gid int) +//sysnb Getpid() (pid int) +//sysnb Getpgid(pid int) (pgid int, err error) +//sysnb Getpgrp() (pgid int, err error) +//sys Geteuid() (euid int) +//sys Getegid() (egid int) +//sys Getppid() (ppid int) +//sys Getpriority(which int, who int) (n int, err error) +//sysnb Getrlimit(which int, lim *Rlimit) (err error) +//sysnb Getrusage(who int, rusage *Rusage) (err error) +//sysnb Getsid(pid int) (sid int, err error) +//sysnb Gettimeofday(tv *Timeval) (err error) +//sysnb Getuid() (uid int) +//sys Kill(pid int, signum syscall.Signal) (err error) +//sys Lchown(path string, uid int, gid int) (err error) +//sys Link(path string, link string) (err error) +//sys Listen(s int, backlog int) (err error) = libsocket.__xnet_llisten +//sys Lstat(path string, stat *Stat_t) (err error) +//sys Madvise(b []byte, advice int) (err error) +//sys Mkdir(path string, mode uint32) (err error) +//sys Mkdirat(dirfd int, path string, mode uint32) (err error) +//sys Mkfifo(path string, mode uint32) (err error) +//sys Mkfifoat(dirfd int, path string, mode uint32) (err error) +//sys Mknod(path string, mode uint32, dev int) (err error) +//sys Mknodat(dirfd int, path string, mode uint32, dev 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) +//sys Nanosleep(time *Timespec, leftover *Timespec) (err error) +//sys Open(path string, mode int, perm uint32) (fd int, err error) +//sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) +//sys Pathconf(path string, name int) (val int, err error) +//sys Pause() (err error) +//sys pread(fd int, p []byte, offset int64) (n int, err error) +//sys pwrite(fd int, p []byte, offset int64) (n int, err error) +//sys read(fd int, p []byte) (n int, err error) +//sys Readlink(path string, buf []byte) (n int, err error) +//sys Rename(from string, to string) (err error) +//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) +//sys Rmdir(path string) (err error) +//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = lseek +//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) +//sysnb Setegid(egid int) (err error) +//sysnb Seteuid(euid int) (err error) +//sysnb Setgid(gid int) (err error) +//sys Sethostname(p []byte) (err error) +//sysnb Setpgid(pid int, pgid int) (err error) +//sys Setpriority(which int, who int, prio int) (err error) +//sysnb Setregid(rgid int, egid int) (err error) +//sysnb Setreuid(ruid int, euid int) (err error) +//sysnb Setsid() (pid int, err error) +//sysnb Setuid(uid int) (err error) +//sys Shutdown(s int, how int) (err error) = libsocket.shutdown +//sys Stat(path string, stat *Stat_t) (err error) +//sys Statvfs(path string, vfsstat *Statvfs_t) (err error) +//sys Symlink(path string, link string) (err error) +//sys Sync() (err error) +//sys Sysconf(which int) (n int64, err error) +//sysnb Times(tms *Tms) (ticks uintptr, err error) +//sys Truncate(path string, length int64) (err error) +//sys Fsync(fd int) (err error) +//sys Ftruncate(fd int, length int64) (err error) +//sys Umask(mask int) (oldmask int) +//sysnb Uname(buf *Utsname) (err error) +//sys Unmount(target string, flags int) (err error) = libc.umount +//sys Unlink(path string) (err error) +//sys Unlinkat(dirfd int, path string, flags int) (err error) +//sys Ustat(dev int, ubuf *Ustat_t) (err error) +//sys Utime(path string, buf *Utimbuf) (err error) +//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_bind +//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_connect +//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) +//sys munmap(addr uintptr, length uintptr) (err error) +//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = libsendfile.sendfile +//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_sendto +//sys socket(domain int, typ int, proto int) (fd int, err error) = libsocket.__xnet_socket +//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) = libsocket.__xnet_socketpair +//sys write(fd int, p []byte) (n int, err error) +//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) = libsocket.__xnet_getsockopt +//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getpeername +//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) = libsocket.setsockopt +//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = libsocket.recvfrom + +// Event Ports + +type fileObjCookie struct { + fobj *fileObj + cookie interface{} +} + +// EventPort provides a safe abstraction on top of Solaris/illumos Event Ports. +type EventPort struct { + port int + mu sync.Mutex + fds map[uintptr]*fileObjCookie + paths map[string]*fileObjCookie + // The user cookie presents an interesting challenge from a memory management perspective. + // There are two paths by which we can discover that it is no longer in use: + // 1. The user calls port_dissociate before any events fire + // 2. An event fires and we return it to the user + // The tricky situation is if the event has fired in the kernel but + // the user hasn't requested/received it yet. + // If the user wants to port_dissociate before the event has been processed, + // we should handle things gracefully. To do so, we need to keep an extra + // reference to the cookie around until the event is processed + // thus the otherwise seemingly extraneous "cookies" map + // The key of this map is a pointer to the corresponding fCookie + cookies map[*fileObjCookie]struct{} +} + +// PortEvent is an abstraction of the port_event C struct. +// Compare Source against PORT_SOURCE_FILE or PORT_SOURCE_FD +// to see if Path or Fd was the event source. The other will be +// uninitialized. +type PortEvent struct { + Cookie interface{} + Events int32 + Fd uintptr + Path string + Source uint16 + fobj *fileObj +} + +// NewEventPort creates a new EventPort including the +// underlying call to port_create(3c). +func NewEventPort() (*EventPort, error) { + port, err := port_create() + if err != nil { + return nil, err + } + e := &EventPort{ + port: port, + fds: make(map[uintptr]*fileObjCookie), + paths: make(map[string]*fileObjCookie), + cookies: make(map[*fileObjCookie]struct{}), + } + return e, nil +} + +//sys port_create() (n int, err error) +//sys port_associate(port int, source int, object uintptr, events int, user *byte) (n int, err error) +//sys port_dissociate(port int, source int, object uintptr) (n int, err error) +//sys port_get(port int, pe *portEvent, timeout *Timespec) (n int, err error) +//sys port_getn(port int, pe *portEvent, max uint32, nget *uint32, timeout *Timespec) (n int, err error) + +// Close closes the event port. +func (e *EventPort) Close() error { + e.mu.Lock() + defer e.mu.Unlock() + err := Close(e.port) + if err != nil { + return err + } + e.fds = nil + e.paths = nil + e.cookies = nil + return nil +} + +// PathIsWatched checks to see if path is associated with this EventPort. +func (e *EventPort) PathIsWatched(path string) bool { + e.mu.Lock() + defer e.mu.Unlock() + _, found := e.paths[path] + return found +} + +// FdIsWatched checks to see if fd is associated with this EventPort. +func (e *EventPort) FdIsWatched(fd uintptr) bool { + e.mu.Lock() + defer e.mu.Unlock() + _, found := e.fds[fd] + return found +} + +// AssociatePath wraps port_associate(3c) for a filesystem path including +// creating the necessary file_obj from the provided stat information. +func (e *EventPort) AssociatePath(path string, stat os.FileInfo, events int, cookie interface{}) error { + e.mu.Lock() + defer e.mu.Unlock() + if _, found := e.paths[path]; found { + return fmt.Errorf("%v is already associated with this Event Port", path) + } + fCookie, err := createFileObjCookie(path, stat, cookie) + if err != nil { + return err + } + _, err = port_associate(e.port, PORT_SOURCE_FILE, uintptr(unsafe.Pointer(fCookie.fobj)), events, (*byte)(unsafe.Pointer(fCookie))) + if err != nil { + return err + } + e.paths[path] = fCookie + e.cookies[fCookie] = struct{}{} + return nil +} + +// DissociatePath wraps port_dissociate(3c) for a filesystem path. +func (e *EventPort) DissociatePath(path string) error { + e.mu.Lock() + defer e.mu.Unlock() + f, ok := e.paths[path] + if !ok { + return fmt.Errorf("%v is not associated with this Event Port", path) + } + _, err := port_dissociate(e.port, PORT_SOURCE_FILE, uintptr(unsafe.Pointer(f.fobj))) + // If the path is no longer associated with this event port (ENOENT) + // we should delete it from our map. We can still return ENOENT to the caller. + // But we need to save the cookie + if err != nil && err != ENOENT { + return err + } + if err == nil { + // dissociate was successful, safe to delete the cookie + fCookie := e.paths[path] + delete(e.cookies, fCookie) + } + delete(e.paths, path) + return err +} + +// AssociateFd wraps calls to port_associate(3c) on file descriptors. +func (e *EventPort) AssociateFd(fd uintptr, events int, cookie interface{}) error { + e.mu.Lock() + defer e.mu.Unlock() + if _, found := e.fds[fd]; found { + return fmt.Errorf("%v is already associated with this Event Port", fd) + } + fCookie, err := createFileObjCookie("", nil, cookie) + if err != nil { + return err + } + _, err = port_associate(e.port, PORT_SOURCE_FD, fd, events, (*byte)(unsafe.Pointer(fCookie))) + if err != nil { + return err + } + e.fds[fd] = fCookie + e.cookies[fCookie] = struct{}{} + return nil +} + +// DissociateFd wraps calls to port_dissociate(3c) on file descriptors. +func (e *EventPort) DissociateFd(fd uintptr) error { + e.mu.Lock() + defer e.mu.Unlock() + _, ok := e.fds[fd] + if !ok { + return fmt.Errorf("%v is not associated with this Event Port", fd) + } + _, err := port_dissociate(e.port, PORT_SOURCE_FD, fd) + if err != nil && err != ENOENT { + return err + } + if err == nil { + // dissociate was successful, safe to delete the cookie + fCookie := e.fds[fd] + delete(e.cookies, fCookie) + } + delete(e.fds, fd) + return err +} + +func createFileObjCookie(name string, stat os.FileInfo, cookie interface{}) (*fileObjCookie, error) { + fCookie := new(fileObjCookie) + fCookie.cookie = cookie + if name != "" && stat != nil { + fCookie.fobj = new(fileObj) + bs, err := ByteSliceFromString(name) + if err != nil { + return nil, err + } + fCookie.fobj.Name = (*int8)(unsafe.Pointer(&bs[0])) + s := stat.Sys().(*syscall.Stat_t) + fCookie.fobj.Atim.Sec = s.Atim.Sec + fCookie.fobj.Atim.Nsec = s.Atim.Nsec + fCookie.fobj.Mtim.Sec = s.Mtim.Sec + fCookie.fobj.Mtim.Nsec = s.Mtim.Nsec + fCookie.fobj.Ctim.Sec = s.Ctim.Sec + fCookie.fobj.Ctim.Nsec = s.Ctim.Nsec + } + return fCookie, nil +} + +// GetOne wraps port_get(3c) and returns a single PortEvent. +func (e *EventPort) GetOne(t *Timespec) (*PortEvent, error) { + pe := new(portEvent) + _, err := port_get(e.port, pe, t) + if err != nil { + return nil, err + } + p := new(PortEvent) + e.mu.Lock() + defer e.mu.Unlock() + err = e.peIntToExt(pe, p) + if err != nil { + return nil, err + } + return p, nil +} + +// peIntToExt converts a cgo portEvent struct into the friendlier PortEvent +// NOTE: Always call this function while holding the e.mu mutex +func (e *EventPort) peIntToExt(peInt *portEvent, peExt *PortEvent) error { + if e.cookies == nil { + return fmt.Errorf("this EventPort is already closed") + } + peExt.Events = peInt.Events + peExt.Source = peInt.Source + fCookie := (*fileObjCookie)(unsafe.Pointer(peInt.User)) + _, found := e.cookies[fCookie] + + if !found { + panic("unexpected event port address; may be due to kernel bug; see https://go.dev/issue/54254") + } + peExt.Cookie = fCookie.cookie + delete(e.cookies, fCookie) + + switch peInt.Source { + case PORT_SOURCE_FD: + peExt.Fd = uintptr(peInt.Object) + // Only remove the fds entry if it exists and this cookie matches + if fobj, ok := e.fds[peExt.Fd]; ok { + if fobj == fCookie { + delete(e.fds, peExt.Fd) + } + } + case PORT_SOURCE_FILE: + peExt.fobj = fCookie.fobj + peExt.Path = BytePtrToString((*byte)(unsafe.Pointer(peExt.fobj.Name))) + // Only remove the paths entry if it exists and this cookie matches + if fobj, ok := e.paths[peExt.Path]; ok { + if fobj == fCookie { + delete(e.paths, peExt.Path) + } + } + } + return nil +} + +// Pending wraps port_getn(3c) and returns how many events are pending. +func (e *EventPort) Pending() (int, error) { + var n uint32 = 0 + _, err := port_getn(e.port, nil, 0, &n, nil) + return int(n), err +} + +// Get wraps port_getn(3c) and fills a slice of PortEvent. +// It will block until either min events have been received +// or the timeout has been exceeded. It will return how many +// events were actually received along with any error information. +func (e *EventPort) Get(s []PortEvent, min int, timeout *Timespec) (int, error) { + if min == 0 { + return 0, fmt.Errorf("need to request at least one event or use Pending() instead") + } + if len(s) < min { + return 0, fmt.Errorf("len(s) (%d) is less than min events requested (%d)", len(s), min) + } + got := uint32(min) + max := uint32(len(s)) + var err error + ps := make([]portEvent, max) + _, err = port_getn(e.port, &ps[0], max, &got, timeout) + // got will be trustworthy with ETIME, but not any other error. + if err != nil && err != ETIME { + return 0, err + } + e.mu.Lock() + defer e.mu.Unlock() + valid := 0 + for i := 0; i < int(got); i++ { + err2 := e.peIntToExt(&ps[i], &s[i]) + if err2 != nil { + if valid == 0 && err == nil { + // If err2 is the only error and there are no valid events + // to return, return it to the caller. + err = err2 + } + break + } + valid = i + 1 + } + return valid, err +} + +//sys putmsg(fd int, clptr *strbuf, dataptr *strbuf, flags int) (err error) + +func Putmsg(fd int, cl []byte, data []byte, flags int) (err error) { + var clp, datap *strbuf + if len(cl) > 0 { + clp = &strbuf{ + Len: int32(len(cl)), + Buf: (*int8)(unsafe.Pointer(&cl[0])), + } + } + if len(data) > 0 { + datap = &strbuf{ + Len: int32(len(data)), + Buf: (*int8)(unsafe.Pointer(&data[0])), + } + } + return putmsg(fd, clp, datap, flags) +} + +//sys getmsg(fd int, clptr *strbuf, dataptr *strbuf, flags *int) (err error) + +func Getmsg(fd int, cl []byte, data []byte) (retCl []byte, retData []byte, flags int, err error) { + var clp, datap *strbuf + if len(cl) > 0 { + clp = &strbuf{ + Maxlen: int32(len(cl)), + Buf: (*int8)(unsafe.Pointer(&cl[0])), + } + } + if len(data) > 0 { + datap = &strbuf{ + Maxlen: int32(len(data)), + Buf: (*int8)(unsafe.Pointer(&data[0])), + } + } + + if err = getmsg(fd, clp, datap, &flags); err != nil { + return nil, nil, 0, err + } + + if len(cl) > 0 { + retCl = cl[:clp.Len] + } + if len(data) > 0 { + retData = data[:datap.Len] + } + return retCl, retData, flags, nil +} + +func IoctlSetIntRetInt(fd int, req int, arg int) (int, error) { + return ioctlRet(fd, req, uintptr(arg)) +} + +func IoctlSetString(fd int, req int, val string) error { + bs := make([]byte, len(val)+1) + copy(bs[:len(bs)-1], val) + err := ioctlPtr(fd, req, unsafe.Pointer(&bs[0])) + runtime.KeepAlive(&bs[0]) + return err +} + +// Lifreq Helpers + +func (l *Lifreq) SetName(name string) error { + if len(name) >= len(l.Name) { + return fmt.Errorf("name cannot be more than %d characters", len(l.Name)-1) + } + for i := range name { + l.Name[i] = int8(name[i]) + } + return nil +} + +func (l *Lifreq) SetLifruInt(d int) { + *(*int)(unsafe.Pointer(&l.Lifru[0])) = d +} + +func (l *Lifreq) GetLifruInt() int { + return *(*int)(unsafe.Pointer(&l.Lifru[0])) +} + +func (l *Lifreq) SetLifruUint(d uint) { + *(*uint)(unsafe.Pointer(&l.Lifru[0])) = d +} + +func (l *Lifreq) GetLifruUint() uint { + return *(*uint)(unsafe.Pointer(&l.Lifru[0])) +} + +func IoctlLifreq(fd int, req int, l *Lifreq) error { + return ioctlPtr(fd, req, unsafe.Pointer(l)) +} + +// Strioctl Helpers + +func (s *Strioctl) SetInt(i int) { + s.Len = int32(unsafe.Sizeof(i)) + s.Dp = (*int8)(unsafe.Pointer(&i)) +} + +func IoctlSetStrioctlRetInt(fd int, req int, s *Strioctl) (int, error) { + return ioctlPtrRet(fd, req, unsafe.Pointer(s)) +} |
