| // 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 |
| // 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 string(buf[:vallen-1]), 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 uint, arg uintptr) (ret int, err error) = libc.ioctl |
| //sys ioctlPtrRet(fd int, req uint, arg unsafe.Pointer) (ret int, err error) = libc.ioctl |
| |
| func ioctl(fd int, req uint, arg uintptr) (err error) { |
| _, err = ioctlRet(fd, req, arg) |
| return err |
| } |
| |
| func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) { |
| _, err = ioctlPtrRet(fd, req, arg) |
| return err |
| } |
| |
| func IoctlSetTermio(fd int, req uint, value *Termio) error { |
| return ioctlPtr(fd, req, unsafe.Pointer(value)) |
| } |
| |
| func IoctlGetTermio(fd int, req uint) (*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 |
| |
| func readlen(fd int, buf *byte, nbuf int) (n int, err error) { |
| r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procread)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0) |
| n = int(r0) |
| if e1 != 0 { |
| err = e1 |
| } |
| return |
| } |
| |
| func writelen(fd int, buf *byte, nbuf int) (n int, err error) { |
| r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procwrite)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0) |
| n = int(r0) |
| if e1 != 0 { |
| err = e1 |
| } |
| return |
| } |
| |
| 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) |
| } |
| |
| // 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 uint, arg int) (int, error) { |
| return ioctlRet(fd, req, uintptr(arg)) |
| } |
| |
| func IoctlSetString(fd int, req uint, 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 uint, 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 uint, s *Strioctl) (int, error) { |
| return ioctlPtrRet(fd, req, unsafe.Pointer(s)) |
| } |