| // 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. | |
| // Linux 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. | |
| package syscall | |
| import "unsafe" | |
| /* | |
| * Wrapped | |
| */ | |
| func Access(path string, mode uint32) (err error) { | |
| return Faccessat(_AT_FDCWD, path, mode, 0) | |
| } | |
| func Chmod(path string, mode uint32) (err error) { | |
| return Fchmodat(_AT_FDCWD, path, mode, 0) | |
| } | |
| func Chown(path string, uid int, gid int) (err error) { | |
| return Fchownat(_AT_FDCWD, path, uid, gid, 0) | |
| } | |
| func Creat(path string, mode uint32) (fd int, err error) { | |
| return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode) | |
| } | |
| //sys linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) | |
| func Link(oldpath string, newpath string) (err error) { | |
| return linkat(_AT_FDCWD, oldpath, _AT_FDCWD, newpath, 0) | |
| } | |
| func Mkdir(path string, mode uint32) (err error) { | |
| return Mkdirat(_AT_FDCWD, path, mode) | |
| } | |
| func Mknod(path string, mode uint32, dev int) (err error) { | |
| return Mknodat(_AT_FDCWD, path, mode, dev) | |
| } | |
| func Open(path string, mode int, perm uint32) (fd int, err error) { | |
| return openat(_AT_FDCWD, path, mode|O_LARGEFILE, perm) | |
| } | |
| //sys openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) | |
| func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) { | |
| return openat(dirfd, path, flags|O_LARGEFILE, mode) | |
| } | |
| //sys readlinkat(dirfd int, path string, buf []byte) (n int, err error) | |
| func Readlink(path string, buf []byte) (n int, err error) { | |
| return readlinkat(_AT_FDCWD, path, buf) | |
| } | |
| func Rename(oldpath string, newpath string) (err error) { | |
| return Renameat(_AT_FDCWD, oldpath, _AT_FDCWD, newpath) | |
| } | |
| func Rmdir(path string) error { | |
| return unlinkat(_AT_FDCWD, path, _AT_REMOVEDIR) | |
| } | |
| //sys symlinkat(oldpath string, newdirfd int, newpath string) (err error) | |
| func Symlink(oldpath string, newpath string) (err error) { | |
| return symlinkat(oldpath, _AT_FDCWD, newpath) | |
| } | |
| func Unlink(path string) error { | |
| return unlinkat(_AT_FDCWD, path, 0) | |
| } | |
| //sys unlinkat(dirfd int, path string, flags int) (err error) | |
| func Unlinkat(dirfd int, path string) error { | |
| return unlinkat(dirfd, path, 0) | |
| } | |
| //sys utimes(path string, times *[2]Timeval) (err error) | |
| func Utimes(path string, tv []Timeval) (err error) { | |
| if len(tv) != 2 { | |
| return EINVAL | |
| } | |
| return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) | |
| } | |
| //sys utimensat(dirfd int, path string, times *[2]Timespec) (err error) | |
| func UtimesNano(path string, ts []Timespec) (err error) { | |
| if len(ts) != 2 { | |
| return EINVAL | |
| } | |
| err = utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0]))) | |
| if err != ENOSYS { | |
| return err | |
| } | |
| // If the utimensat syscall isn't available (utimensat was added to Linux | |
| // in 2.6.22, Released, 8 July 2007) then fall back to utimes | |
| var tv [2]Timeval | |
| for i := 0; i < 2; i++ { | |
| tv[i].Sec = ts[i].Sec | |
| tv[i].Usec = ts[i].Nsec / 1000 | |
| } | |
| return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) | |
| } | |
| //sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error) | |
| func Futimesat(dirfd int, path string, tv []Timeval) (err error) { | |
| if len(tv) != 2 { | |
| return EINVAL | |
| } | |
| pathp, err := BytePtrFromString(path) | |
| if err != nil { | |
| return err | |
| } | |
| err = futimesat(dirfd, pathp, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) | |
| use(unsafe.Pointer(pathp)) | |
| return err | |
| } | |
| func Futimes(fd int, tv []Timeval) (err error) { | |
| // Believe it or not, this is the best we can do on Linux | |
| // (and is what glibc does). | |
| return Utimes("/proc/self/fd/"+itoa(fd), tv) | |
| } | |
| const ImplementsGetwd = true | |
| //sys Getcwd(buf []byte) (n int, err error) | |
| func Getwd() (wd string, err error) { | |
| var buf [PathMax]byte | |
| n, err := Getcwd(buf[0:]) | |
| if err != nil { | |
| return "", err | |
| } | |
| // Getcwd returns the number of bytes written to buf, including the NUL. | |
| if n < 1 || n > len(buf) || buf[n-1] != 0 { | |
| return "", EINVAL | |
| } | |
| return string(buf[0 : n-1]), nil | |
| } | |
| 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 1<<16 on Linux. | |
| if n < 0 || n > 1<<20 { | |
| 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]) | |
| } | |
| type WaitStatus uint32 | |
| // 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. At least that's the idea. | |
| // There are various irregularities. For example, the | |
| // "continued" status is 0xFFFF, distinguishing itself | |
| // from stopped via the core dump bit. | |
| const ( | |
| mask = 0x7F | |
| core = 0x80 | |
| exited = 0x00 | |
| stopped = 0x7F | |
| shift = 8 | |
| ) | |
| func (w WaitStatus) Exited() bool { return w&mask == exited } | |
| func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited } | |
| func (w WaitStatus) Stopped() bool { return w&0xFF == stopped } | |
| func (w WaitStatus) Continued() bool { return w == 0xFFFF } | |
| func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } | |
| func (w WaitStatus) ExitStatus() int { | |
| if !w.Exited() { | |
| return -1 | |
| } | |
| return int(w>>shift) & 0xFF | |
| } | |
| func (w WaitStatus) Signal() Signal { | |
| if !w.Signaled() { | |
| return -1 | |
| } | |
| return Signal(w & mask) | |
| } | |
| func (w WaitStatus) StopSignal() Signal { | |
| if !w.Stopped() { | |
| return -1 | |
| } | |
| return Signal(w>>shift) & 0xFF | |
| } | |
| func (w WaitStatus) TrapCause() int { | |
| if w.StopSignal() != SIGTRAP { | |
| return -1 | |
| } | |
| return int(w>>shift) >> 8 | |
| } | |
| //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 | |
| } | |
| func Mkfifo(path string, mode uint32) (err error) { | |
| return Mknod(path, mode|S_IFIFO, 0) | |
| } | |
| 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) | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.raw.Addr[i] = sa.Addr[i] | |
| } | |
| 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 | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.raw.Addr[i] = sa.Addr[i] | |
| } | |
| 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 | |
| } | |
| type SockaddrLinklayer struct { | |
| Protocol uint16 | |
| Ifindex int | |
| Hatype uint16 | |
| Pkttype uint8 | |
| Halen uint8 | |
| Addr [8]byte | |
| raw RawSockaddrLinklayer | |
| } | |
| func (sa *SockaddrLinklayer) sockaddr() (unsafe.Pointer, _Socklen, error) { | |
| if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff { | |
| return nil, 0, EINVAL | |
| } | |
| sa.raw.Family = AF_PACKET | |
| sa.raw.Protocol = sa.Protocol | |
| sa.raw.Ifindex = int32(sa.Ifindex) | |
| sa.raw.Hatype = sa.Hatype | |
| sa.raw.Pkttype = sa.Pkttype | |
| sa.raw.Halen = sa.Halen | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.raw.Addr[i] = sa.Addr[i] | |
| } | |
| return unsafe.Pointer(&sa.raw), SizeofSockaddrLinklayer, nil | |
| } | |
| type SockaddrNetlink struct { | |
| Family uint16 | |
| Pad uint16 | |
| Pid uint32 | |
| Groups uint32 | |
| raw RawSockaddrNetlink | |
| } | |
| func (sa *SockaddrNetlink) sockaddr() (unsafe.Pointer, _Socklen, error) { | |
| sa.raw.Family = AF_NETLINK | |
| sa.raw.Pad = sa.Pad | |
| sa.raw.Pid = sa.Pid | |
| sa.raw.Groups = sa.Groups | |
| return unsafe.Pointer(&sa.raw), SizeofSockaddrNetlink, nil | |
| } | |
| func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { | |
| switch rsa.Addr.Family { | |
| case AF_NETLINK: | |
| pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa)) | |
| sa := new(SockaddrNetlink) | |
| sa.Family = pp.Family | |
| sa.Pad = pp.Pad | |
| sa.Pid = pp.Pid | |
| sa.Groups = pp.Groups | |
| return sa, nil | |
| case AF_PACKET: | |
| pp := (*RawSockaddrLinklayer)(unsafe.Pointer(rsa)) | |
| sa := new(SockaddrLinklayer) | |
| sa.Protocol = pp.Protocol | |
| sa.Ifindex = int(pp.Ifindex) | |
| sa.Hatype = pp.Hatype | |
| sa.Pkttype = pp.Pkttype | |
| sa.Halen = pp.Halen | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.Addr[i] = pp.Addr[i] | |
| } | |
| return sa, nil | |
| case AF_UNIX: | |
| pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) | |
| sa := new(SockaddrUnix) | |
| if pp.Path[0] == 0 { | |
| // "Abstract" Unix domain socket. | |
| // Rewrite leading NUL as @ for textual display. | |
| // (This is the standard convention.) | |
| // Not friendly to overwrite in place, | |
| // but the callers below don't care. | |
| pp.Path[0] = '@' | |
| } | |
| // Assume path ends at NUL. | |
| // This is not technically the Linux 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++ | |
| } | |
| bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] | |
| sa.Name = string(bytes) | |
| return sa, nil | |
| case AF_INET: | |
| pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) | |
| sa := new(SockaddrInet4) | |
| p := (*[2]byte)(unsafe.Pointer(&pp.Port)) | |
| sa.Port = int(p[0])<<8 + int(p[1]) | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.Addr[i] = pp.Addr[i] | |
| } | |
| return sa, nil | |
| case AF_INET6: | |
| pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) | |
| sa := new(SockaddrInet6) | |
| p := (*[2]byte)(unsafe.Pointer(&pp.Port)) | |
| sa.Port = int(p[0])<<8 + int(p[1]) | |
| sa.ZoneId = pp.Scope_id | |
| for i := 0; i < len(sa.Addr); i++ { | |
| sa.Addr[i] = pp.Addr[i] | |
| } | |
| return sa, nil | |
| } | |
| return nil, EAFNOSUPPORT | |
| } | |
| func Accept(fd int) (nfd int, sa Sockaddr, err error) { | |
| var rsa RawSockaddrAny | |
| var len _Socklen = SizeofSockaddrAny | |
| nfd, err = accept(fd, &rsa, &len) | |
| if err != nil { | |
| return | |
| } | |
| sa, err = anyToSockaddr(&rsa) | |
| if err != nil { | |
| Close(nfd) | |
| nfd = 0 | |
| } | |
| return | |
| } | |
| func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) { | |
| var rsa RawSockaddrAny | |
| var len _Socklen = SizeofSockaddrAny | |
| nfd, err = accept4(fd, &rsa, &len, flags) | |
| if err != nil { | |
| return | |
| } | |
| if len > SizeofSockaddrAny { | |
| panic("RawSockaddrAny too small") | |
| } | |
| sa, err = anyToSockaddr(&rsa) | |
| if err != nil { | |
| Close(nfd) | |
| nfd = 0 | |
| } | |
| return | |
| } | |
| func Getsockname(fd int) (sa Sockaddr, err error) { | |
| var rsa RawSockaddrAny | |
| var len _Socklen = SizeofSockaddrAny | |
| if err = getsockname(fd, &rsa, &len); err != nil { | |
| return | |
| } | |
| return anyToSockaddr(&rsa) | |
| } | |
| func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { | |
| vallen := _Socklen(4) | |
| err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) | |
| return value, err | |
| } | |
| func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { | |
| var value IPMreq | |
| vallen := _Socklen(SizeofIPMreq) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { | |
| var value IPMreqn | |
| vallen := _Socklen(SizeofIPMreqn) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { | |
| var value IPv6Mreq | |
| vallen := _Socklen(SizeofIPv6Mreq) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { | |
| var value IPv6MTUInfo | |
| vallen := _Socklen(SizeofIPv6MTUInfo) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { | |
| var value ICMPv6Filter | |
| vallen := _Socklen(SizeofICMPv6Filter) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func GetsockoptUcred(fd, level, opt int) (*Ucred, error) { | |
| var value Ucred | |
| vallen := _Socklen(SizeofUcred) | |
| err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) | |
| return &value, err | |
| } | |
| func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { | |
| return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) | |
| } | |
| func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { | |
| var msg Msghdr | |
| var rsa RawSockaddrAny | |
| msg.Name = (*byte)(unsafe.Pointer(&rsa)) | |
| msg.Namelen = uint32(SizeofSockaddrAny) | |
| var iov Iovec | |
| if len(p) > 0 { | |
| iov.Base = (*byte)(unsafe.Pointer(&p[0])) | |
| iov.SetLen(len(p)) | |
| } | |
| var dummy byte | |
| if len(oob) > 0 { | |
| // receive at least one normal byte | |
| if len(p) == 0 { | |
| iov.Base = &dummy | |
| iov.SetLen(1) | |
| } | |
| msg.Control = (*byte)(unsafe.Pointer(&oob[0])) | |
| msg.SetControllen(len(oob)) | |
| } | |
| msg.Iov = &iov | |
| msg.Iovlen = 1 | |
| if n, err = recvmsg(fd, &msg, flags); err != nil { | |
| return | |
| } | |
| oobn = int(msg.Controllen) | |
| recvflags = int(msg.Flags) | |
| // source address is only specified if the socket is unconnected | |
| if rsa.Addr.Family != AF_UNSPEC { | |
| from, err = anyToSockaddr(&rsa) | |
| } | |
| return | |
| } | |
| func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { | |
| _, err = SendmsgN(fd, p, oob, to, flags) | |
| return | |
| } | |
| func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { | |
| var ptr unsafe.Pointer | |
| var salen _Socklen | |
| if to != nil { | |
| var err error | |
| ptr, salen, err = to.sockaddr() | |
| if err != nil { | |
| return 0, err | |
| } | |
| } | |
| var msg Msghdr | |
| msg.Name = (*byte)(unsafe.Pointer(ptr)) | |
| msg.Namelen = uint32(salen) | |
| var iov Iovec | |
| if len(p) > 0 { | |
| iov.Base = (*byte)(unsafe.Pointer(&p[0])) | |
| iov.SetLen(len(p)) | |
| } | |
| var dummy byte | |
| if len(oob) > 0 { | |
| // send at least one normal byte | |
| if len(p) == 0 { | |
| iov.Base = &dummy | |
| iov.SetLen(1) | |
| } | |
| msg.Control = (*byte)(unsafe.Pointer(&oob[0])) | |
| msg.SetControllen(len(oob)) | |
| } | |
| msg.Iov = &iov | |
| msg.Iovlen = 1 | |
| if n, err = sendmsg(fd, &msg, flags); err != nil { | |
| return 0, err | |
| } | |
| if len(oob) > 0 && len(p) == 0 { | |
| n = 0 | |
| } | |
| return n, nil | |
| } | |
| // BindToDevice binds the socket associated with fd to device. | |
| func BindToDevice(fd int, device string) (err error) { | |
| return SetsockoptString(fd, SOL_SOCKET, SO_BINDTODEVICE, device) | |
| } | |
| //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) | |
| func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err error) { | |
| // The peek requests are machine-size oriented, so we wrap it | |
| // to retrieve arbitrary-length data. | |
| // The ptrace syscall differs from glibc's ptrace. | |
| // Peeks returns the word in *data, not as the return value. | |
| var buf [sizeofPtr]byte | |
| // Leading edge. PEEKTEXT/PEEKDATA don't require aligned | |
| // access (PEEKUSER warns that it might), but if we don't | |
| // align our reads, we might straddle an unmapped page | |
| // boundary and not get the bytes leading up to the page | |
| // boundary. | |
| n := 0 | |
| if addr%sizeofPtr != 0 { | |
| err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) | |
| if err != nil { | |
| return 0, err | |
| } | |
| n += copy(out, buf[addr%sizeofPtr:]) | |
| out = out[n:] | |
| } | |
| // Remainder. | |
| for len(out) > 0 { | |
| // We use an internal buffer to guarantee alignment. | |
| // It's not documented if this is necessary, but we're paranoid. | |
| err = ptrace(req, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) | |
| if err != nil { | |
| return n, err | |
| } | |
| copied := copy(out, buf[0:]) | |
| n += copied | |
| out = out[copied:] | |
| } | |
| return n, nil | |
| } | |
| func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { | |
| return ptracePeek(PTRACE_PEEKTEXT, pid, addr, out) | |
| } | |
| func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { | |
| return ptracePeek(PTRACE_PEEKDATA, pid, addr, out) | |
| } | |
| func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (count int, err error) { | |
| // As for ptracePeek, we need to align our accesses to deal | |
| // with the possibility of straddling an invalid page. | |
| // Leading edge. | |
| n := 0 | |
| if addr%sizeofPtr != 0 { | |
| var buf [sizeofPtr]byte | |
| err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) | |
| if err != nil { | |
| return 0, err | |
| } | |
| n += copy(buf[addr%sizeofPtr:], data) | |
| word := *((*uintptr)(unsafe.Pointer(&buf[0]))) | |
| err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word) | |
| if err != nil { | |
| return 0, err | |
| } | |
| data = data[n:] | |
| } | |
| // Interior. | |
| for len(data) > sizeofPtr { | |
| word := *((*uintptr)(unsafe.Pointer(&data[0]))) | |
| err = ptrace(pokeReq, pid, addr+uintptr(n), word) | |
| if err != nil { | |
| return n, err | |
| } | |
| n += sizeofPtr | |
| data = data[sizeofPtr:] | |
| } | |
| // Trailing edge. | |
| if len(data) > 0 { | |
| var buf [sizeofPtr]byte | |
| err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) | |
| if err != nil { | |
| return n, err | |
| } | |
| copy(buf[0:], data) | |
| word := *((*uintptr)(unsafe.Pointer(&buf[0]))) | |
| err = ptrace(pokeReq, pid, addr+uintptr(n), word) | |
| if err != nil { | |
| return n, err | |
| } | |
| n += len(data) | |
| } | |
| return n, nil | |
| } | |
| func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { | |
| return ptracePoke(PTRACE_POKETEXT, PTRACE_PEEKTEXT, pid, addr, data) | |
| } | |
| func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { | |
| return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data) | |
| } | |
| func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) { | |
| return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout))) | |
| } | |
| func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) { | |
| return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs))) | |
| } | |
| func PtraceSetOptions(pid int, options int) (err error) { | |
| return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options)) | |
| } | |
| func PtraceGetEventMsg(pid int) (msg uint, err error) { | |
| var data _C_long | |
| err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data))) | |
| msg = uint(data) | |
| return | |
| } | |
| func PtraceCont(pid int, signal int) (err error) { | |
| return ptrace(PTRACE_CONT, pid, 0, uintptr(signal)) | |
| } | |
| func PtraceSyscall(pid int, signal int) (err error) { | |
| return ptrace(PTRACE_SYSCALL, pid, 0, uintptr(signal)) | |
| } | |
| func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) } | |
| func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) } | |
| func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) } | |
| //sys reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error) | |
| func Reboot(cmd int) (err error) { | |
| return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "") | |
| } | |
| func clen(n []byte) int { | |
| for i := 0; i < len(n); i++ { | |
| if n[i] == 0 { | |
| return i | |
| } | |
| } | |
| return len(n) | |
| } | |
| func ReadDirent(fd int, buf []byte) (n int, err error) { | |
| return Getdents(fd, buf) | |
| } | |
| func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) { | |
| origlen := len(buf) | |
| count = 0 | |
| for max != 0 && len(buf) > 0 { | |
| dirent := (*Dirent)(unsafe.Pointer(&buf[0])) | |
| buf = buf[dirent.Reclen:] | |
| if dirent.Ino == 0 { // File absent in directory. | |
| continue | |
| } | |
| bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0])) | |
| var name = string(bytes[0:clen(bytes[:])]) | |
| if name == "." || name == ".." { // Useless names | |
| continue | |
| } | |
| max-- | |
| count++ | |
| names = append(names, name) | |
| } | |
| return origlen - len(buf), count, names | |
| } | |
| //sys mount(source string, target string, fstype string, flags uintptr, data *byte) (err error) | |
| func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) { | |
| // Certain file systems get rather angry and EINVAL if you give | |
| // them an empty string of data, rather than NULL. | |
| if data == "" { | |
| return mount(source, target, fstype, flags, nil) | |
| } | |
| datap, err := BytePtrFromString(data) | |
| if err != nil { | |
| return err | |
| } | |
| err = mount(source, target, fstype, flags, datap) | |
| use(unsafe.Pointer(datap)) | |
| return err | |
| } | |
| // Sendto | |
| // Recvfrom | |
| // Socketpair | |
| /* | |
| * Direct access | |
| */ | |
| //sys Acct(path string) (err error) | |
| //sys Adjtimex(buf *Timex) (state int, err error) | |
| //sys Chdir(path string) (err error) | |
| //sys Chroot(path string) (err error) | |
| //sys Close(fd int) (err error) | |
| //sys Dup(oldfd int) (fd int, err error) | |
| //sys Dup3(oldfd int, newfd int, flags int) (err error) | |
| //sysnb EpollCreate(size int) (fd int, err error) | |
| //sysnb EpollCreate1(flag int) (fd int, err error) | |
| //sysnb EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) | |
| //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) | |
| //sys Exit(code int) = SYS_EXIT_GROUP | |
| //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) | |
| //sys Fallocate(fd int, mode uint32, off int64, len int64) (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 Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) | |
| //sys fcntl(fd int, cmd int, arg int) (val int, err error) | |
| //sys Fdatasync(fd int) (err error) | |
| //sys Flock(fd int, how int) (err error) | |
| //sys Fsync(fd int) (err error) | |
| //sys Getdents(fd int, buf []byte) (n int, err error) = _SYS_getdents | |
| //sysnb Getpgid(pid int) (pgid int, err error) | |
| func Getpgrp() (pid int) { | |
| pid, _ = Getpgid(0) | |
| return | |
| } | |
| //sysnb Getpid() (pid int) | |
| //sysnb Getppid() (ppid int) | |
| //sys Getpriority(which int, who int) (prio int, err error) | |
| //sysnb Getrusage(who int, rusage *Rusage) (err error) | |
| //sysnb Gettid() (tid int) | |
| //sys Getxattr(path string, attr string, dest []byte) (sz int, err error) | |
| //sys InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) | |
| //sysnb InotifyInit1(flags int) (fd int, err error) | |
| //sysnb InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) | |
| //sysnb Kill(pid int, sig Signal) (err error) | |
| //sys Klogctl(typ int, buf []byte) (n int, err error) = SYS_SYSLOG | |
| //sys Listxattr(path string, dest []byte) (sz int, err error) | |
| //sys Mkdirat(dirfd int, path string, mode uint32) (err error) | |
| //sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) | |
| //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) | |
| //sys Pause() (err error) | |
| //sys PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT | |
| //sysnb prlimit(pid int, resource int, old *Rlimit, newlimit *Rlimit) (err error) = SYS_PRLIMIT64 | |
| //sys read(fd int, p []byte) (n int, err error) | |
| //sys Removexattr(path string, attr string) (err error) | |
| //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) | |
| //sys Setdomainname(p []byte) (err error) | |
| //sys Sethostname(p []byte) (err error) | |
| //sysnb Setpgid(pid int, pgid int) (err error) | |
| //sysnb Setsid() (pid int, err error) | |
| //sysnb Settimeofday(tv *Timeval) (err error) | |
| // issue 1435. | |
| // On linux Setuid and Setgid only affects the current thread, not the process. | |
| // This does not match what most callers expect so we must return an error | |
| // here rather than letting the caller think that the call succeeded. | |
| func Setuid(uid int) (err error) { | |
| return EOPNOTSUPP | |
| } | |
| func Setgid(gid int) (err error) { | |
| return EOPNOTSUPP | |
| } | |
| //sys Setpriority(which int, who int, prio int) (err error) | |
| //sys Setxattr(path string, attr string, data []byte, flags int) (err error) | |
| //sys Sync() | |
| //sysnb Sysinfo(info *Sysinfo_t) (err error) | |
| //sys Tee(rfd int, wfd int, len int, flags int) (n int64, err error) | |
| //sysnb Tgkill(tgid int, tid int, sig Signal) (err error) | |
| //sysnb Times(tms *Tms) (ticks uintptr, err error) | |
| //sysnb Umask(mask int) (oldmask int) | |
| //sysnb Uname(buf *Utsname) (err error) | |
| //sys Unmount(target string, flags int) (err error) = SYS_UMOUNT2 | |
| //sys Unshare(flags int) (err error) | |
| //sys Ustat(dev int, ubuf *Ustat_t) (err error) | |
| //sys Utime(path string, buf *Utimbuf) (err error) | |
| //sys write(fd int, p []byte) (n int, err error) | |
| //sys exitThread(code int) (err error) = SYS_EXIT | |
| //sys readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ | |
| //sys writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE | |
| // mmap varies by architecture; see syscall_linux_*.go. | |
| //sys munmap(addr uintptr, length uintptr) (err error) | |
| var mapper = &mmapper{ | |
| active: make(map[*byte][]byte), | |
| mmap: mmap, | |
| munmap: munmap, | |
| } | |
| func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { | |
| return mapper.Mmap(fd, offset, length, prot, flags) | |
| } | |
| func Munmap(b []byte) (err error) { | |
| return mapper.Munmap(b) | |
| } | |
| //sys Madvise(b []byte, advice int) (err error) | |
| //sys Mprotect(b []byte, prot int) (err error) | |
| //sys Mlock(b []byte) (err error) | |
| //sys Munlock(b []byte) (err error) | |
| //sys Mlockall(flags int) (err error) | |
| //sys Munlockall() (err error) | |
| /* | |
| * Unimplemented | |
| */ | |
| // AddKey | |
| // AfsSyscall | |
| // Alarm | |
| // ArchPrctl | |
| // Brk | |
| // Capget | |
| // Capset | |
| // ClockGetres | |
| // ClockGettime | |
| // ClockNanosleep | |
| // ClockSettime | |
| // Clone | |
| // CreateModule | |
| // DeleteModule | |
| // EpollCtlOld | |
| // EpollPwait | |
| // EpollWaitOld | |
| // Eventfd | |
| // Execve | |
| // Fadvise64 | |
| // Fgetxattr | |
| // Flistxattr | |
| // Fork | |
| // Fremovexattr | |
| // Fsetxattr | |
| // Futex | |
| // GetKernelSyms | |
| // GetMempolicy | |
| // GetRobustList | |
| // GetThreadArea | |
| // Getitimer | |
| // Getpmsg | |
| // IoCancel | |
| // IoDestroy | |
| // IoGetevents | |
| // IoSetup | |
| // IoSubmit | |
| // Ioctl | |
| // IoprioGet | |
| // IoprioSet | |
| // KexecLoad | |
| // Keyctl | |
| // Lgetxattr | |
| // Llistxattr | |
| // LookupDcookie | |
| // Lremovexattr | |
| // Lsetxattr | |
| // Mbind | |
| // MigratePages | |
| // Mincore | |
| // ModifyLdt | |
| // Mount | |
| // MovePages | |
| // Mprotect | |
| // MqGetsetattr | |
| // MqNotify | |
| // MqOpen | |
| // MqTimedreceive | |
| // MqTimedsend | |
| // MqUnlink | |
| // Mremap | |
| // Msgctl | |
| // Msgget | |
| // Msgrcv | |
| // Msgsnd | |
| // Msync | |
| // Newfstatat | |
| // Nfsservctl | |
| // Personality | |
| // Poll | |
| // Ppoll | |
| // Prctl | |
| // Pselect6 | |
| // Ptrace | |
| // Putpmsg | |
| // QueryModule | |
| // Quotactl | |
| // Readahead | |
| // Readv | |
| // RemapFilePages | |
| // RequestKey | |
| // RestartSyscall | |
| // RtSigaction | |
| // RtSigpending | |
| // RtSigprocmask | |
| // RtSigqueueinfo | |
| // RtSigreturn | |
| // RtSigsuspend | |
| // RtSigtimedwait | |
| // SchedGetPriorityMax | |
| // SchedGetPriorityMin | |
| // SchedGetaffinity | |
| // SchedGetparam | |
| // SchedGetscheduler | |
| // SchedRrGetInterval | |
| // SchedSetaffinity | |
| // SchedSetparam | |
| // SchedYield | |
| // Security | |
| // Semctl | |
| // Semget | |
| // Semop | |
| // Semtimedop | |
| // SetMempolicy | |
| // SetRobustList | |
| // SetThreadArea | |
| // SetTidAddress | |
| // Shmat | |
| // Shmctl | |
| // Shmdt | |
| // Shmget | |
| // Sigaltstack | |
| // Signalfd | |
| // Swapoff | |
| // Swapon | |
| // Sysfs | |
| // TimerCreate | |
| // TimerDelete | |
| // TimerGetoverrun | |
| // TimerGettime | |
| // TimerSettime | |
| // Timerfd | |
| // Tkill (obsolete) | |
| // Tuxcall | |
| // Umount2 | |
| // Uselib | |
| // Utimensat | |
| // Vfork | |
| // Vhangup | |
| // Vmsplice | |
| // Vserver | |
| // Waitid | |
| // _Sysctl |