// Copyright 2018 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.
// Aix 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"
)
// Implemented in runtime/syscall_aix.go.
func rawSyscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
// Constant expected by package but not supported
const (
_ = iota
TIOCSCTTY
F_DUPFD_CLOEXEC
SYS_EXECVE
SYS_FCNTL
)
const (
// AF_LOCAL doesn't exist on AIX
AF_LOCAL = AF_UNIX
)
func (ts *StTimespec_t) Unix() (sec int64, nsec int64) {
return int64(ts.Sec), int64(ts.Nsec)
}
func (ts *StTimespec_t) Nano() int64 {
return int64(ts.Sec)*1e9 + int64(ts.Nsec)
}
/*
* Wrapped
*/
// fcntl must never be called with cmd=F_DUP2FD because it doesn't work on AIX
// There is no way to create a custom fcntl and to keep //sys fcntl easily,
// because we need fcntl name for its libc symbol. This is linked with the script.
// But, as fcntl is currently not exported and isn't called with F_DUP2FD,
// it doesn't matter.
//sys fcntl(fd int, cmd int, arg int) (val int, err error)
//sys Dup2(old int, new int) (err error)
//sysnb pipe(p *[2]_C_int) (err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
var pp [2]_C_int
err = pipe(&pp)
p[0] = int(pp[0])
p[1] = int(pp[1])
return
}
//sys readlink(path string, buf []byte, bufSize uint64) (n int, err error)
func Readlink(path string, buf []byte) (n int, err error) {
s := uint64(len(buf))
return readlink(path, buf, s)
}
//sys utimes(path string, times *[2]Timeval) (err error)
func Utimes(path string, tv []Timeval) 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, flag int) (err error)
func UtimesNano(path string, ts []Timespec) error {
if len(ts) != 2 {
return EINVAL
}
return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
}
//sys unlinkat(dirfd int, path string, flags int) (err error)
func Unlinkat(dirfd int, path string) (err error) {
return unlinkat(dirfd, path, 0)
}
//sys getcwd(buf *byte, size uint64) (err error)
const ImplementsGetwd = true
func Getwd() (ret string, err error) {
for len := uint64(4096); ; len *= 2 {
b := make([]byte, len)
err := getcwd(&b[0], len)
if err == nil {
i := 0
for b[i] != 0 {
i++
}
return string(b[0:i]), nil
}
if err != ERANGE {
return "", err
}
}
}
func Getcwd(buf []byte) (n int, err error) {
err = getcwd(&buf[0], uint64(len(buf)))
if err == nil {
i := 0
for buf[i] != 0 {
i++
}
n = i + 1
}
return
}
//sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error)
//sysnb setgroups(ngid int, gid *_Gid_t) (err error)
func Getgroups() (gids []int, err error) {
n, err := getgroups(0, nil)
if err != nil {
return nil, err
}
if n == 0 {
return nil, nil
}
// Sanity check group count. Max is 16 on BSD.
if n < 0 || n > 1000 {
return nil, EINVAL
}
a := make([]_Gid_t, n)
n, err = getgroups(n, &a[0])
if err != nil {
return nil, err
}
gids = make([]int, n)
for i, v := range a[0:n] {
gids[i] = int(v)
}
return
}
func Setgroups(gids []int) (err error) {
if len(gids) == 0 {
return setgroups(0, nil)
}
a := make([]_Gid_t, len(gids))
for i, v := range gids {
a[i] = _Gid_t(v)
}
return setgroups(len(a), &a[0])
}
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
}
func Gettimeofday(tv *Timeval) (err error) {
err = gettimeofday(tv, nil)
return
}
// TODO
func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
return -1, ENOSYS
}
//sys getdirent(fd int, buf []byte) (n int, err error)
func ReadDirent(fd int, buf []byte) (n int, err error) {
return getdirent(fd, buf)
}
//sys wait4(pid _Pid_t, status *_C_int, options int, rusage *Rusage) (wpid _Pid_t, err error)
func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
var status _C_int
var r _Pid_t
err = ERESTART
// AIX wait4 may return with ERESTART errno, while the processus is still
// active.
for err == ERESTART {
r, err = wait4(_Pid_t(pid), &status, options, rusage)
}
wpid = int(r)
if wstatus != nil {
*wstatus = WaitStatus(status)
}
return
}
/*
* Socket
*/
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys Listen(s int, backlog int) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sys socket(domain int, typ int, proto int) (fd int, err error)
//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
//sys getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
//sys Shutdown(s int, how int) (err error)
// In order to use msghdr structure with Control, Controllen in golang.org/x/net,
// nrecvmsg and nsendmsg must be used.
//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = nrecvmsg
//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg
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 *RawSockaddrUnix) setLen(n int) {
sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL.
}
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
sa.raw.setLen(n)
for i := 0; i < n; i++ {
sa.raw.Path[i] = uint8(name[i])
}
// length is family (uint16), name, NUL.
sl := _Socklen(2)
if n > 0 {
sl += _Socklen(n) + 1
}
return unsafe.Pointer(&sa.raw), sl, nil
}
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)
}
//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
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 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 {
var sockType int
sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE)
if err != nil {
return
}
// receive at least one normal byte
if sockType != SOCK_DGRAM && 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 {
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 {
var sockType int
sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE)
if err != nil {
return 0, err
}
// send at least one normal byte
if sockType != SOCK_DGRAM && 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
}
func (sa *RawSockaddrUnix) getLen() (int, error) {
// Some versions of AIX have a bug in getsockname (see IV78655).
// We can't rely on sa.Len being set correctly.
n := SizeofSockaddrUnix - 3 // subtract leading Family, Len, terminating NUL.
for i := 0; i < n; i++ {
if sa.Path[i] == 0 {
n = i
break
}
}
return n, nil
}
func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) {
switch rsa.Addr.Family {
case AF_UNIX:
pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
sa := new(SockaddrUnix)
n, err := pp.getLen()
if err != nil {
return nil, err
}
bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))
sa.Name = string(bytes[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])
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])
for i := 0; i < len(sa.Addr); i++ {
sa.Addr[i] = pp.Addr[i]
}
return sa, nil
}
return nil, EAFNOSUPPORT
}
type SockaddrDatalink struct {
Len uint8
Family uint8
Index uint16
Type uint8
Nlen uint8
Alen uint8
Slen uint8
Data [120]uint8
raw RawSockaddrDatalink
}
/*
* Wait
*/
type WaitStatus uint32
func (w WaitStatus) Stopped() bool { return w&0x40 != 0 }
func (w WaitStatus) StopSignal() Signal {
if !w.Stopped() {
return -1
}
return Signal(w>>8) & 0xFF
}
func (w WaitStatus) Exited() bool { return w&0xFF == 0 }
func (w WaitStatus) ExitStatus() int {
if !w.Exited() {
return -1
}
return int((w >> 8) & 0xFF)
}
func (w WaitStatus) Signaled() bool { return w&0x40 == 0 && w&0xFF != 0 }
func (w WaitStatus) Signal() Signal {
if !w.Signaled() {
return -1
}
return Signal(w>>16) & 0xFF
}
func (w WaitStatus) Continued() bool { return w&0x01000000 != 0 }
func (w WaitStatus) CoreDump() bool { return w&0x200 == 0 }
func (w WaitStatus) TrapCause() int { return -1 }
/*
* ptrace
*/
//sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
//sys ptrace64(request int, id int64, addr int64, data int, buff uintptr) (err error)
func raw_ptrace(request int, pid int, addr *byte, data *byte) Errno {
if request == PTRACE_TRACEME {
// Convert to AIX ptrace call.
err := ptrace64(PT_TRACE_ME, 0, 0, 0, 0)
if err != nil {
return err.(Errno)
}
return 0
}
return ENOSYS
}
func ptracePeek(pid int, addr uintptr, out []byte) (count int, err error) {
n := 0
for len(out) > 0 {
bsize := len(out)
if bsize > 1024 {
bsize = 1024
}
err = ptrace64(PT_READ_BLOCK, int64(pid), int64(addr), bsize, uintptr(unsafe.Pointer(&out[0])))
if err != nil {
return 0, err
}
addr += uintptr(bsize)
n += bsize
out = out[n:]
}
return n, nil
}
func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) {
return ptracePeek(pid, addr, out)
}
func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) {
return ptracePeek(pid, addr, out)
}
func ptracePoke(pid int, addr uintptr, data []byte) (count int, err error) {
n := 0
for len(data) > 0 {
bsize := len(data)
if bsize > 1024 {
bsize = 1024
}
err = ptrace64(PT_WRITE_BLOCK, int64(pid), int64(addr), bsize, uintptr(unsafe.Pointer(&data[0])))
if err != nil {
return 0, err
}
addr += uintptr(bsize)
n += bsize
data = data[n:]
}
return n, nil
}
func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) {
return ptracePoke(pid, addr, data)
}
func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
return ptracePoke(pid, addr, data)
}
func PtraceCont(pid int, signal int) (err error) {
return ptrace64(PT_CONTINUE, int64(pid), 1, signal, 0)
}
func PtraceSingleStep(pid int) (err error) { return ptrace64(PT_STEP, int64(pid), 1, 0, 0) }
func PtraceAttach(pid int) (err error) { return ptrace64(PT_ATTACH, int64(pid), 0, 0, 0) }
func PtraceDetach(pid int) (err error) { return ptrace64(PT_DETACH, int64(pid), 0, 0, 0) }
/*
* Direct access
*/
//sys Acct(path string) (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 Close(fd int) (err error)
//sys Dup(fd int) (nfd int, err error)
//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 Fpathconf(fd int, name int) (val int, err error)
//sys Fstat(fd int, stat *Stat_t) (err error)
//sys Fstatfs(fd int, buf *Statfs_t) (err error)
//sys Ftruncate(fd int, length int64) (err error)
//sys Fsync(fd int) (err error)
//sysnb Getgid() (gid int)
//sysnb Getpid() (pid int)
//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 Getuid() (uid int)
//sys Kill(pid int, signum Signal) (err error)
//sys Lchown(path string, uid int, gid int) (err error)
//sys Link(path string, link string) (err error)
//sys Lstat(path string, stat *Stat_t) (err error)
//sys Mkdir(path string, mode uint32) (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 Open(path string, mode int, perm uint32) (fd int, 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 Reboot(how 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
//sysnb Setegid(egid int) (err error)
//sysnb Seteuid(euid int) (err error)
//sysnb Setgid(gid int) (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 Setrlimit(which int, lim *Rlimit) (err error)
//sys Stat(path string, stat *Stat_t) (err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
//sys Symlink(path string, link string) (err error)
//sys Truncate(path string, length int64) (err error)
//sys Umask(newmask int) (oldmask int)
//sys Unlink(path string) (err error)
//sysnb Uname(buf *Utsname) (err error)
//sys write(fd int, p []byte) (n int, err error)
//sys gettimeofday(tv *Timeval, tzp *Timezone) (err error)
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: sec, Usec: int32(usec)}
}
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_read)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0)
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
/*
* Map
*/
var mapper = &mmapper{
active: make(map[*byte][]byte),
mmap: mmap,
munmap: munmap,
}
//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)
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)
}
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