// Copyright 2020 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.
//go:build zos && s390x
// +build zos,s390x
package unix
import (
"bytes"
"runtime"
"sort"
"sync"
"syscall"
"unsafe"
)
const (
O_CLOEXEC = 0 // Dummy value (not supported).
AF_LOCAL = AF_UNIX // AF_LOCAL is an alias for AF_UNIX
)
func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func syscall_syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func syscall_rawsyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func syscall_syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
func syscall_rawsyscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
func copyStat(stat *Stat_t, statLE *Stat_LE_t) {
stat.Dev = uint64(statLE.Dev)
stat.Ino = uint64(statLE.Ino)
stat.Nlink = uint64(statLE.Nlink)
stat.Mode = uint32(statLE.Mode)
stat.Uid = uint32(statLE.Uid)
stat.Gid = uint32(statLE.Gid)
stat.Rdev = uint64(statLE.Rdev)
stat.Size = statLE.Size
stat.Atim.Sec = int64(statLE.Atim)
stat.Atim.Nsec = 0 //zos doesn't return nanoseconds
stat.Mtim.Sec = int64(statLE.Mtim)
stat.Mtim.Nsec = 0 //zos doesn't return nanoseconds
stat.Ctim.Sec = int64(statLE.Ctim)
stat.Ctim.Nsec = 0 //zos doesn't return nanoseconds
stat.Blksize = int64(statLE.Blksize)
stat.Blocks = statLE.Blocks
}
func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64)
func svcLoad(name *byte) unsafe.Pointer
func svcUnload(name *byte, fnptr unsafe.Pointer) int64
func (d *Dirent) NameString() string {
if d == nil {
return ""
}
return string(d.Name[:d.Namlen])
}
func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
if sa.Port < 0 || sa.Port > 0xFFFF {
return nil, 0, EINVAL
}
sa.raw.Len = SizeofSockaddrInet4
sa.raw.Family = AF_INET
p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
p[0] = byte(sa.Port >> 8)
p[1] = byte(sa.Port)
sa.raw.Addr = sa.Addr
return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}
func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
if sa.Port < 0 || sa.Port > 0xFFFF {
return nil, 0, EINVAL
}
sa.raw.Len = SizeofSockaddrInet6
sa.raw.Family = AF_INET6
p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
p[0] = byte(sa.Port >> 8)
p[1] = byte(sa.Port)
sa.raw.Scope_id = sa.ZoneId
sa.raw.Addr = sa.Addr
return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}
func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
name := sa.Name
n := len(name)
if n >= len(sa.raw.Path) || n == 0 {
return nil, 0, EINVAL
}
sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL
sa.raw.Family = AF_UNIX
for i := 0; i < n; i++ {
sa.raw.Path[i] = int8(name[i])
}
return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}
func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) {
// TODO(neeilan): Implement use of first param (fd)
switch rsa.Addr.Family {
case AF_UNIX:
pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
sa := new(SockaddrUnix)
// For z/OS, only replace NUL with @ when the
// length is not zero.
if pp.Len != 0 && 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.
//
// For z/OS, the length of the name is a field
// in the structure. To be on the safe side, we
// will still scan the name for a NUL but only
// to the length provided in the structure.
//
// 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 < int(pp.Len) && pp.Path[n] != 0 {
n++
}
bytes := (*[len(pp.Path)]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])
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
}
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
}
// TODO(neeilan): Remove 0 in call
sa, err = anyToSockaddr(0, &rsa)
if err != nil {
Close(nfd)
nfd = 0
}
return
}
func (iov *Iovec) SetLen(length int) {
iov.Len = uint64(length)
}
func (msghdr *Msghdr) SetControllen(length int) {
msghdr.Controllen = int32(length)
}
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = int32(length)
}
//sys fcntl(fd int, cmd int, arg int) (val int, err error)
//sys read(fd int, p []byte) (n int, err error)
//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
//sys write(fd int, p []byte) (n int, err error)
//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = SYS___ACCEPT_A
//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___BIND_A
//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___CONNECT_A
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
//sysnb 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___GETPEERNAME_A
//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = SYS___GETSOCKNAME_A
//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = SYS___RECVFROM_A
//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = SYS___SENDTO_A
//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___RECVMSG_A
//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___SENDMSG_A
//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) = SYS_MMAP
//sys munmap(addr uintptr, length uintptr) (err error) = SYS_MUNMAP
//sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL
//sys Access(path string, mode uint32) (err error) = SYS___ACCESS_A
//sys Chdir(path string) (err error) = SYS___CHDIR_A
//sys Chown(path string, uid int, gid int) (err error) = SYS___CHOWN_A
//sys Chmod(path string, mode uint32) (err error) = SYS___CHMOD_A
//sys Creat(path string, mode uint32) (fd int, err error) = SYS___CREAT_A
//sys Dup(oldfd int) (fd int, err error)
//sys Dup2(oldfd int, newfd int) (err error)
//sys Errno2() (er2 int) = SYS___ERRNO2
//sys Err2ad() (eadd *int) = SYS___ERR2AD
//sys Exit(code int)
//sys Fchdir(fd int) (err error)
//sys Fchmod(fd int, mode uint32) (err error)
//sys Fchown(fd int, uid int, gid int) (err error)
//sys FcntlInt(fd uintptr, cmd int, arg int) (retval int, err error) = SYS_FCNTL
//sys fstat(fd int, stat *Stat_LE_t) (err error)
func Fstat(fd int, stat *Stat_t) (err error) {
var statLE Stat_LE_t
err = fstat(fd, &statLE)
copyStat(stat, &statLE)
return
}
//sys Fstatvfs(fd int, stat *Statvfs_t) (err error) = SYS_FSTATVFS
//sys Fsync(fd int) (err error)
//sys Ftruncate(fd int, length int64) (err error)
//sys Getpagesize() (pgsize int) = SYS_GETPAGESIZE
//sys Mprotect(b []byte, prot int) (err error) = SYS_MPROTECT
//sys Msync(b []byte, flags int) (err error) = SYS_MSYNC
//sys Poll(fds []PollFd, timeout int) (n int, err error) = SYS_POLL
//sys Times(tms *Tms) (ticks uintptr, err error) = SYS_TIMES
//sys W_Getmntent(buff *byte, size int) (lastsys int, err error) = SYS_W_GETMNTENT
//sys W_Getmntent_A(buff *byte, size int) (lastsys int, err error) = SYS___W_GETMNTENT_A
//sys mount_LE(path string, filesystem string, fstype string, mtm uint32, parmlen int32, parm string) (err error) = SYS___MOUNT_A
//sys unmount(filesystem string, mtm int) (err error) = SYS___UMOUNT_A
//sys Chroot(path string) (err error) = SYS___CHROOT_A
//sys Select(nmsgsfds int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (ret int, err error) = SYS_SELECT
//sysnb Uname(buf *Utsname) (err error) = SYS___UNAME_A
func Ptsname(fd int) (name string, err error) {
r0, _, e1 := syscall_syscall(SYS___PTSNAME_A, uintptr(fd), 0, 0)
name = u2s(unsafe.Pointer(r0))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func u2s(cstr unsafe.Pointer) string {
str := (*[1024]uint8)(cstr)
i := 0
for str[i] != 0 {
i++
}
return string(str[:i])
}
func Close(fd int) (err error) {
_, _, e1 := syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0)
for i := 0; e1 == EAGAIN && i < 10; i++ {
_, _, _ = syscall_syscall(SYS_USLEEP, uintptr(10), 0, 0)
_, _, e1 = syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0)
}
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var mapper = &mmapper{
active: make(map[*byte][]byte),
mmap: mmap,
munmap: munmap,
}
// Dummy function: there are no semantics for Madvise on z/OS
func Madvise(b []byte, advice int) (err error) {
return
}
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 Gethostname(buf []byte) (err error) = SYS___GETHOSTNAME_A
//sysnb Getegid() (egid int)
//sysnb Geteuid() (uid int)
//sysnb Getgid() (gid int)
//sysnb Getpid() (pid int)
//sysnb Getpgid(pid int) (pgid int, err error) = SYS_GETPGID
func Getpgrp() (pid int) {
pid, _ = Getpgid(0)
return
}
//sysnb Getppid() (pid int)
//sys Getpriority(which int, who int) (prio int, err error)
//sysnb Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT
//sysnb getrusage(who int, rusage *rusage_zos) (err error) = SYS_GETRUSAGE
func Getrusage(who int, rusage *Rusage) (err error) {
var ruz rusage_zos
err = getrusage(who, &ruz)
//Only the first two fields of Rusage are set
rusage.Utime.Sec = ruz.Utime.Sec
rusage.Utime.Usec = int64(ruz.Utime.Usec)
rusage.Stime.Sec = ruz.Stime.Sec
rusage.Stime.Usec = int64(ruz.Stime.Usec)
return
}
//sysnb Getsid(pid int) (sid int, err error) = SYS_GETSID
//sysnb Getuid() (uid int)
//sysnb Kill(pid int, sig Signal) (err error)
//sys Lchown(path string, uid int, gid int) (err error) = SYS___LCHOWN_A
//sys Link(path string, link string) (err error) = SYS___LINK_A
//sys Listen(s int, n int) (err error)
//sys lstat(path string, stat *Stat_LE_t) (err error) = SYS___LSTAT_A
func Lstat(path string, stat *Stat_t) (err error) {
var statLE Stat_LE_t
err = lstat(path, &statLE)
copyStat(stat, &statLE)
return
}
//sys Mkdir(path string, mode uint32) (err error) = SYS___MKDIR_A
//sys Mkfifo(path string, mode uint32) (err error) = SYS___MKFIFO_A
//sys Mknod(path string, mode uint32, dev int) (err error) = SYS___MKNOD_A
//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 Readlink(path string, buf []byte) (n int, err error) = SYS___READLINK_A
//sys Rename(from string, to string) (err error) = SYS___RENAME_A
//sys Rmdir(path string) (err error) = SYS___RMDIR_A
//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
//sys Setpriority(which int, who int, prio int) (err error)
//sysnb Setpgid(pid int, pgid int) (err error) = SYS_SETPGID
//sysnb Setrlimit(resource int, lim *Rlimit) (err error)
//sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID
//sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID
//sysnb Setsid() (pid int, err error) = SYS_SETSID
//sys Setuid(uid int) (err error) = SYS_SETUID
//sys Setgid(uid int) (err error) = SYS_SETGID
//sys Shutdown(fd int, how int) (err error)
//sys stat(path string, statLE *Stat_LE_t) (err error) = SYS___STAT_A
func Stat(path string, sta *Stat_t) (err error) {
var statLE Stat_LE_t
err = stat(path, &statLE)
copyStat(sta, &statLE)
return
}
//sys Symlink(path string, link string) (err error) = SYS___SYMLINK_A
//sys Sync() = SYS_SYNC
//sys Truncate(path string, length int64) (err error) = SYS___TRUNCATE_A
//sys Tcgetattr(fildes int, termptr *Termios) (err error) = SYS_TCGETATTR
//sys Tcsetattr(fildes int, when int, termptr *Termios) (err error) = SYS_TCSETATTR
//sys Umask(mask int) (oldmask int)
//sys Unlink(path string) (err error) = SYS___UNLINK_A
//sys Utime(path string, utim *Utimbuf) (err error) = SYS___UTIME_A
//sys open(path string, mode int, perm uint32) (fd int, err error) = SYS___OPEN_A
func Open(path string, mode int, perm uint32) (fd int, err error) {
return open(path, mode, perm)
}
func Mkfifoat(dirfd int, path string, mode uint32) (err error) {
wd, err := Getwd()
if err != nil {
return err
}
if err := Fchdir(dirfd); err != nil {
return err
}
defer Chdir(wd)
return Mkfifo(path, mode)
}
//sys remove(path string) (err error)
func Remove(path string) error {
return remove(path)
}
const ImplementsGetwd = true
func Getcwd(buf []byte) (n int, err error) {
var p unsafe.Pointer
if len(buf) > 0 {
p = unsafe.Pointer(&buf[0])
} else {
p = unsafe.Pointer(&_zero)
}
_, _, e := syscall_syscall(SYS___GETCWD_A, uintptr(p), uintptr(len(buf)), 0)
n = clen(buf) + 1
if e != 0 {
err = errnoErr(e)
}
return
}
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])
}
func gettid() uint64
func Gettid() (tid int) {
return int(gettid())
}
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 { return -1 }
//sys waitpid(pid int, wstatus *_C_int, options int) (wpid int, err error)
func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
// TODO(mundaym): z/OS doesn't have wait4. I don't think getrusage does what we want.
// At the moment rusage will not be touched.
var status _C_int
wpid, err = waitpid(pid, &status, options)
if wstatus != nil {
*wstatus = WaitStatus(status)
}
return
}
//sysnb gettimeofday(tv *timeval_zos) (err error)
func Gettimeofday(tv *Timeval) (err error) {
var tvz timeval_zos
err = gettimeofday(&tvz)
tv.Sec = tvz.Sec
tv.Usec = int64(tvz.Usec)
return
}
func Time(t *Time_t) (tt Time_t, err error) {
var tv Timeval
err = Gettimeofday(&tv)
if err != nil {
return 0, err
}
if t != nil {
*t = Time_t(tv.Sec)
}
return Time_t(tv.Sec), nil
}
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval { //fix
return Timeval{Sec: sec, Usec: usec}
}
//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)
if err == nil {
p[0] = int(pp[0])
p[1] = int(pp[1])
}
return
}
//sys utimes(path string, timeval *[2]Timeval) (err error) = SYS___UTIMES_A
func Utimes(path string, tv []Timeval) (err error) {
if len(tv) != 2 {
return EINVAL
}
return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}
func UtimesNano(path string, ts []Timespec) error {
if len(ts) != 2 {
return EINVAL
}
// Not as efficient as it could be because Timespec and
// Timeval have different types in the different OSes
tv := [2]Timeval{
NsecToTimeval(TimespecToNsec(ts[0])),
NsecToTimeval(TimespecToNsec(ts[1])),
}
return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}
func Getsockname(fd int) (sa Sockaddr, err error) {
var rsa RawSockaddrAny
var len _Socklen = SizeofSockaddrAny
if err = getsockname(fd, &rsa, &len); err != nil {
return
}
// TODO(neeilan) : Remove this 0 ( added to get sys/unix compiling on z/OS )
return anyToSockaddr(0, &rsa)
}
const (
// identifier constants
nwmHeaderIdentifier = 0xd5e6d4c8
nwmFilterIdentifier = 0xd5e6d4c6
nwmTCPConnIdentifier = 0xd5e6d4c3
nwmRecHeaderIdentifier = 0xd5e6d4d9
nwmIPStatsIdentifier = 0xd5e6d4c9d7e2e340
nwmIPGStatsIdentifier = 0xd5e6d4c9d7c7e2e3
nwmTCPStatsIdentifier = 0xd5e6d4e3c3d7e2e3
nwmUDPStatsIdentifier = 0xd5e6d4e4c4d7e2e3
nwmICMPGStatsEntry = 0xd5e6d4c9c3d4d7c7
nwmICMPTStatsEntry = 0xd5e6d4c9c3d4d7e3
// nwmHeader constants
nwmVersion1 = 1
nwmVersion2 = 2
nwmCurrentVer = 2
nwmTCPConnType = 1
nwmGlobalStatsType = 14
// nwmFilter constants
nwmFilterLclAddrMask = 0x20000000 // Local address
nwmFilterSrcAddrMask = 0x20000000 // Source address
nwmFilterLclPortMask = 0x10000000 // Local port
nwmFilterSrcPortMask = 0x10000000 // Source port
// nwmConnEntry constants
nwmTCPStateClosed = 1
nwmTCPStateListen = 2
nwmTCPStateSynSent = 3
nwmTCPStateSynRcvd = 4
nwmTCPStateEstab = 5
nwmTCPStateFinWait1 = 6
nwmTCPStateFinWait2 = 7
nwmTCPStateClosWait = 8
nwmTCPStateLastAck = 9
nwmTCPStateClosing = 10
nwmTCPStateTimeWait = 11
nwmTCPStateDeletTCB = 12
// Existing constants on linux
BPF_TCP_CLOSE = 1
BPF_TCP_LISTEN = 2
BPF_TCP_SYN_SENT = 3
BPF_TCP_SYN_RECV = 4
BPF_TCP_ESTABLISHED = 5
BPF_TCP_FIN_WAIT1 = 6
BPF_TCP_FIN_WAIT2 = 7
BPF_TCP_CLOSE_WAIT = 8
BPF_TCP_LAST_ACK = 9
BPF_TCP_CLOSING = 10
BPF_TCP_TIME_WAIT = 11
BPF_TCP_NEW_SYN_RECV = -1
BPF_TCP_MAX_STATES = -2
)
type nwmTriplet struct {
offset uint32
length uint32
number uint32
}
type nwmQuadruplet struct {
offset uint32
length uint32
number uint32
match uint32
}
type nwmHeader struct {
ident uint32
length uint32
version uint16
nwmType uint16
bytesNeeded uint32
options uint32
_ [16]byte
inputDesc nwmTriplet
outputDesc nwmQuadruplet
}
type nwmFilter struct {
ident uint32
flags uint32
resourceName [8]byte
resourceId uint32
listenerId uint32
local [28]byte // union of sockaddr4 and sockaddr6
remote [28]byte // union of sockaddr4 and sockaddr6
_ uint16
_ uint16
asid uint16
_ [2]byte
tnLuName [8]byte
tnMonGrp uint32
tnAppl [8]byte
applData [40]byte
nInterface [16]byte
dVipa [16]byte
dVipaPfx uint16
dVipaPort uint16
dVipaFamily byte
_ [3]byte
destXCF [16]byte
destXCFPfx uint16
destXCFFamily byte
_ [1]byte
targIP [16]byte
targIPPfx uint16
targIPFamily byte
_ [1]byte
_ [20]byte
}
type nwmRecHeader struct {
ident uint32
length uint32
number byte
_ [3]byte
}
type nwmTCPStatsEntry struct {
ident uint64
currEstab uint32
activeOpened uint32
passiveOpened uint32
connClosed uint32
estabResets uint32
attemptFails uint32
passiveDrops uint32
timeWaitReused uint32
inSegs uint64
predictAck uint32
predictData uint32
inDupAck uint32
inBadSum uint32
inBadLen uint32
inShort uint32
inDiscOldTime uint32
inAllBeforeWin uint32
inSomeBeforeWin uint32
inAllAfterWin uint32
inSomeAfterWin uint32
inOutOfOrder uint32
inAfterClose uint32
inWinProbes uint32
inWinUpdates uint32
outWinUpdates uint32
outSegs uint64
outDelayAcks uint32
outRsts uint32
retransSegs uint32
retransTimeouts uint32
retransDrops uint32
pmtuRetrans uint32
pmtuErrors uint32
outWinProbes uint32
probeDrops uint32
keepAliveProbes uint32
keepAliveDrops uint32
finwait2Drops uint32
acceptCount uint64
inBulkQSegs uint64
inDiscards uint64
connFloods uint32
connStalls uint32
cfgEphemDef uint16
ephemInUse uint16
ephemHiWater uint16
flags byte
_ [1]byte
ephemExhaust uint32
smcRCurrEstabLnks uint32
smcRLnkActTimeOut uint32
smcRActLnkOpened uint32
smcRPasLnkOpened uint32
smcRLnksClosed uint32
smcRCurrEstab uint32
smcRActiveOpened uint32
smcRPassiveOpened uint32
smcRConnClosed uint32
smcRInSegs uint64
smcROutSegs uint64
smcRInRsts uint32
smcROutRsts uint32
smcDCurrEstabLnks uint32
smcDActLnkOpened uint32
smcDPasLnkOpened uint32
smcDLnksClosed uint32
smcDCurrEstab uint32
smcDActiveOpened uint32
smcDPassiveOpened uint32
smcDConnClosed uint32
smcDInSegs uint64
smcDOutSegs uint64
smcDInRsts uint32
smcDOutRsts uint32
}
type nwmConnEntry struct {
ident uint32
local [28]byte // union of sockaddr4 and sockaddr6
remote [28]byte // union of sockaddr4 and sockaddr6
startTime [8]byte // uint64, changed to prevent padding from being inserted
lastActivity [8]byte // uint64
bytesIn [8]byte // uint64
bytesOut [8]byte // uint64
inSegs [8]byte // uint64
outSegs [8]byte // uint64
state uint16
activeOpen byte
flag01 byte
outBuffered uint32
inBuffered uint32
maxSndWnd uint32
reXmtCount uint32
congestionWnd uint32
ssThresh uint32
roundTripTime uint32
roundTripVar uint32
sendMSS uint32
sndWnd uint32
rcvBufSize uint32
sndBufSize uint32
outOfOrderCount uint32
lcl0WindowCount uint32
rmt0WindowCount uint32
dupacks uint32
flag02 byte
sockOpt6Cont byte
asid uint16
resourceName [8]byte
resourceId uint32
subtask uint32
sockOpt byte
sockOpt6 byte
clusterConnFlag byte
proto byte
targetAppl [8]byte
luName [8]byte
clientUserId [8]byte
logMode [8]byte
timeStamp uint32
timeStampAge uint32
serverResourceId uint32
intfName [16]byte
ttlsStatPol byte
ttlsStatConn byte
ttlsSSLProt uint16
ttlsNegCiph [2]byte
ttlsSecType byte
ttlsFIPS140Mode byte
ttlsUserID [8]byte
applData [40]byte
inOldestTime [8]byte // uint64
outOldestTime [8]byte // uint64
tcpTrustedPartner byte
_ [3]byte
bulkDataIntfName [16]byte
ttlsNegCiph4 [4]byte
smcReason uint32
lclSMCLinkId uint32
rmtSMCLinkId uint32
smcStatus byte
smcFlags byte
_ [2]byte
rcvWnd uint32
lclSMCBufSz uint32
rmtSMCBufSz uint32
ttlsSessID [32]byte
ttlsSessIDLen int16
_ [1]byte
smcDStatus byte
smcDReason uint32
}
var svcNameTable [][]byte = [][]byte{
[]byte("\xc5\xe9\xc2\xd5\xd4\xc9\xc6\xf4"), // svc_EZBNMIF4
}
const (
svc_EZBNMIF4 = 0
)
func GetsockoptTCPInfo(fd, level, opt int) (*TCPInfo, error) {
jobname := []byte("\x5c\x40\x40\x40\x40\x40\x40\x40") // "*"
responseBuffer := [4096]byte{0}
var bufferAlet, reasonCode uint32 = 0, 0
var bufferLen, returnValue, returnCode int32 = 4096, 0, 0
dsa := [18]uint64{0}
var argv [7]unsafe.Pointer
argv[0] = unsafe.Pointer(&jobname[0])
argv[1] = unsafe.Pointer(&responseBuffer[0])
argv[2] = unsafe.Pointer(&bufferAlet)
argv[3] = unsafe.Pointer(&bufferLen)
argv[4] = unsafe.Pointer(&returnValue)
argv[5] = unsafe.Pointer(&returnCode)
argv[6] = unsafe.Pointer(&reasonCode)
request := (*struct {
header nwmHeader
filter nwmFilter
})(unsafe.Pointer(&responseBuffer[0]))
EZBNMIF4 := svcLoad(&svcNameTable[svc_EZBNMIF4][0])
if EZBNMIF4 == nil {
return nil, errnoErr(EINVAL)
}
// GetGlobalStats EZBNMIF4 call
request.header.ident = nwmHeaderIdentifier
request.header.length = uint32(unsafe.Sizeof(request.header))
request.header.version = nwmCurrentVer
request.header.nwmType = nwmGlobalStatsType
request.header.options = 0x80000000
svcCall(EZBNMIF4, &argv[0], &dsa[0])
// outputDesc field is filled by EZBNMIF4 on success
if returnCode != 0 || request.header.outputDesc.offset == 0 {
return nil, errnoErr(EINVAL)
}
// Check that EZBNMIF4 returned a nwmRecHeader
recHeader := (*nwmRecHeader)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset]))
if recHeader.ident != nwmRecHeaderIdentifier {
return nil, errnoErr(EINVAL)
}
// Parse nwmTriplets to get offsets of returned entries
var sections []*uint64
var sectionDesc *nwmTriplet = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[0]))
for i := uint32(0); i < uint32(recHeader.number); i++ {
offset := request.header.outputDesc.offset + uint32(unsafe.Sizeof(*recHeader)) + i*uint32(unsafe.Sizeof(*sectionDesc))
sectionDesc = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[offset]))
for j := uint32(0); j < sectionDesc.number; j++ {
offset = request.header.outputDesc.offset + sectionDesc.offset + j*sectionDesc.length
sections = append(sections, (*uint64)(unsafe.Pointer(&responseBuffer[offset])))
}
}
// Find nwmTCPStatsEntry in returned entries
var tcpStats *nwmTCPStatsEntry = nil
for _, ptr := range sections {
switch *ptr {
case nwmTCPStatsIdentifier:
if tcpStats != nil {
return nil, errnoErr(EINVAL)
}
tcpStats = (*nwmTCPStatsEntry)(unsafe.Pointer(ptr))
case nwmIPStatsIdentifier:
case nwmIPGStatsIdentifier:
case nwmUDPStatsIdentifier:
case nwmICMPGStatsEntry:
case nwmICMPTStatsEntry:
default:
return nil, errnoErr(EINVAL)
}
}
if tcpStats == nil {
return nil, errnoErr(EINVAL)
}
// GetConnectionDetail EZBNMIF4 call
responseBuffer = [4096]byte{0}
dsa = [18]uint64{0}
bufferAlet, reasonCode = 0, 0
bufferLen, returnValue, returnCode = 4096, 0, 0
nameptr := (*uint32)(unsafe.Pointer(uintptr(0x21c))) // Get jobname of current process
nameptr = (*uint32)(unsafe.Pointer(uintptr(*nameptr + 12)))
argv[0] = unsafe.Pointer(uintptr(*nameptr))
request.header.ident = nwmHeaderIdentifier
request.header.length = uint32(unsafe.Sizeof(request.header))
request.header.version = nwmCurrentVer
request.header.nwmType = nwmTCPConnType
request.header.options = 0x80000000
request.filter.ident = nwmFilterIdentifier
var localSockaddr RawSockaddrAny
socklen := _Socklen(SizeofSockaddrAny)
err := getsockname(fd, &localSockaddr, &socklen)
if err != nil {
return nil, errnoErr(EINVAL)
}
if localSockaddr.Addr.Family == AF_INET {
localSockaddr := (*RawSockaddrInet4)(unsafe.Pointer(&localSockaddr.Addr))
localSockFilter := (*RawSockaddrInet4)(unsafe.Pointer(&request.filter.local[0]))
localSockFilter.Family = AF_INET
var i int
for i = 0; i < 4; i++ {
if localSockaddr.Addr[i] != 0 {
break
}
}
if i != 4 {
request.filter.flags |= nwmFilterLclAddrMask
for i = 0; i < 4; i++ {
localSockFilter.Addr[i] = localSockaddr.Addr[i]
}
}
if localSockaddr.Port != 0 {
request.filter.flags |= nwmFilterLclPortMask
localSockFilter.Port = localSockaddr.Port
}
} else if localSockaddr.Addr.Family == AF_INET6 {
localSockaddr := (*RawSockaddrInet6)(unsafe.Pointer(&localSockaddr.Addr))
localSockFilter := (*RawSockaddrInet6)(unsafe.Pointer(&request.filter.local[0]))
localSockFilter.Family = AF_INET6
var i int
for i = 0; i < 16; i++ {
if localSockaddr.Addr[i] != 0 {
break
}
}
if i != 16 {
request.filter.flags |= nwmFilterLclAddrMask
for i = 0; i < 16; i++ {
localSockFilter.Addr[i] = localSockaddr.Addr[i]
}
}
if localSockaddr.Port != 0 {
request.filter.flags |= nwmFilterLclPortMask
localSockFilter.Port = localSockaddr.Port
}
}
svcCall(EZBNMIF4, &argv[0], &dsa[0])
// outputDesc field is filled by EZBNMIF4 on success
if returnCode != 0 || request.header.outputDesc.offset == 0 {
return nil, errnoErr(EINVAL)
}
// Check that EZBNMIF4 returned a nwmConnEntry
conn := (*nwmConnEntry)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset]))
if conn.ident != nwmTCPConnIdentifier {
return nil, errnoErr(EINVAL)
}
// Copy data from the returned data structures into tcpInfo
// Stats from nwmConnEntry are specific to that connection.
// Stats from nwmTCPStatsEntry are global (to the interface?)
// Fields may not be an exact match. Some fields have no equivalent.
var tcpinfo TCPInfo
tcpinfo.State = uint8(conn.state)
tcpinfo.Ca_state = 0 // dummy
tcpinfo.Retransmits = uint8(tcpStats.retransSegs)
tcpinfo.Probes = uint8(tcpStats.outWinProbes)
tcpinfo.Backoff = 0 // dummy
tcpinfo.Options = 0 // dummy
tcpinfo.Rto = tcpStats.retransTimeouts
tcpinfo.Ato = tcpStats.outDelayAcks
tcpinfo.Snd_mss = conn.sendMSS
tcpinfo.Rcv_mss = conn.sendMSS // dummy
tcpinfo.Unacked = 0 // dummy
tcpinfo.Sacked = 0 // dummy
tcpinfo.Lost = 0 // dummy
tcpinfo.Retrans = conn.reXmtCount
tcpinfo.Fackets = 0 // dummy
tcpinfo.Last_data_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.lastActivity[0])))
tcpinfo.Last_ack_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.outOldestTime[0])))
tcpinfo.Last_data_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0])))
tcpinfo.Last_ack_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0])))
tcpinfo.Pmtu = conn.sendMSS // dummy, NWMIfRouteMtu is a candidate
tcpinfo.Rcv_ssthresh = conn.ssThresh
tcpinfo.Rtt = conn.roundTripTime
tcpinfo.Rttvar = conn.roundTripVar
tcpinfo.Snd_ssthresh = conn.ssThresh // dummy
tcpinfo.Snd_cwnd = conn.congestionWnd
tcpinfo.Advmss = conn.sendMSS // dummy
tcpinfo.Reordering = 0 // dummy
tcpinfo.Rcv_rtt = conn.roundTripTime // dummy
tcpinfo.Rcv_space = conn.sendMSS // dummy
tcpinfo.Total_retrans = conn.reXmtCount
svcUnload(&svcNameTable[svc_EZBNMIF4][0], EZBNMIF4)
return &tcpinfo, nil
}
// 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
}
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 = 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 {
// TODO(neeilan): Remove 0 arg added to get this compiling on z/OS
from, err = anyToSockaddr(0, &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 = int32(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
}
func Opendir(name string) (uintptr, error) {
p, err := BytePtrFromString(name)
if err != nil {
return 0, err
}
dir, _, e := syscall_syscall(SYS___OPENDIR_A, uintptr(unsafe.Pointer(p)), 0, 0)
runtime.KeepAlive(unsafe.Pointer(p))
if e != 0 {
err = errnoErr(e)
}
return dir, err
}
// clearsyscall.Errno resets the errno value to 0.
func clearErrno()
func Readdir(dir uintptr) (*Dirent, error) {
var ent Dirent
var res uintptr
// __readdir_r_a returns errno at the end of the directory stream, rather than 0.
// Therefore to avoid false positives we clear errno before calling it.
// TODO(neeilan): Commented this out to get sys/unix compiling on z/OS. Uncomment and fix. Error: "undefined: clearsyscall"
//clearsyscall.Errno() // TODO(mundaym): check pre-emption rules.
e, _, _ := syscall_syscall(SYS___READDIR_R_A, dir, uintptr(unsafe.Pointer(&ent)), uintptr(unsafe.Pointer(&res)))
var err error
if e != 0 {
err = errnoErr(Errno(e))
}
if res == 0 {
return nil, err
}
return &ent, err
}
func Closedir(dir uintptr) error {
_, _, e := syscall_syscall(SYS_CLOSEDIR, dir, 0, 0)
if e != 0 {
return errnoErr(e)
}
return nil
}
func Seekdir(dir uintptr, pos int) {
_, _, _ = syscall_syscall(SYS_SEEKDIR, dir, uintptr(pos), 0)
}
func Telldir(dir uintptr) (int, error) {
p, _, e := syscall_syscall(SYS_TELLDIR, dir, 0, 0)
pos := int(p)
if pos == -1 {
return pos, errnoErr(e)
}
return pos, nil
}
// 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 {
// struct flock is packed on z/OS. We can't emulate that in Go so
// instead we pack it here.
var flock [24]byte
*(*int16)(unsafe.Pointer(&flock[0])) = lk.Type
*(*int16)(unsafe.Pointer(&flock[2])) = lk.Whence
*(*int64)(unsafe.Pointer(&flock[4])) = lk.Start
*(*int64)(unsafe.Pointer(&flock[12])) = lk.Len
*(*int32)(unsafe.Pointer(&flock[20])) = lk.Pid
_, _, errno := syscall_syscall(SYS_FCNTL, fd, uintptr(cmd), uintptr(unsafe.Pointer(&flock)))
lk.Type = *(*int16)(unsafe.Pointer(&flock[0]))
lk.Whence = *(*int16)(unsafe.Pointer(&flock[2]))
lk.Start = *(*int64)(unsafe.Pointer(&flock[4]))
lk.Len = *(*int64)(unsafe.Pointer(&flock[12]))
lk.Pid = *(*int32)(unsafe.Pointer(&flock[20]))
if errno == 0 {
return nil
}
return errno
}
func Flock(fd int, how int) error {
var flock_type int16
var fcntl_cmd int
switch how {
case LOCK_SH | LOCK_NB:
flock_type = F_RDLCK
fcntl_cmd = F_SETLK
case LOCK_EX | LOCK_NB:
flock_type = F_WRLCK
fcntl_cmd = F_SETLK
case LOCK_EX:
flock_type = F_WRLCK
fcntl_cmd = F_SETLKW
case LOCK_UN:
flock_type = F_UNLCK
fcntl_cmd = F_SETLKW
default:
}
flock := Flock_t{
Type: int16(flock_type),
Whence: int16(0),
Start: int64(0),
Len: int64(0),
Pid: int32(Getppid()),
}
err := FcntlFlock(uintptr(fd), fcntl_cmd, &flock)
return err
}
func Mlock(b []byte) (err error) {
_, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func Mlock2(b []byte, flags int) (err error) {
_, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func Mlockall(flags int) (err error) {
_, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func Munlock(b []byte) (err error) {
_, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func Munlockall() (err error) {
_, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
func ClockGettime(clockid int32, ts *Timespec) error {
var ticks_per_sec uint32 = 100 //TODO(kenan): value is currently hardcoded; need sysconf() call otherwise
var nsec_per_sec int64 = 1000000000
if ts == nil {
return EFAULT
}
if clockid == CLOCK_REALTIME || clockid == CLOCK_MONOTONIC {
var nanotime int64 = runtime.Nanotime1()
ts.Sec = nanotime / nsec_per_sec
ts.Nsec = nanotime % nsec_per_sec
} else if clockid == CLOCK_PROCESS_CPUTIME_ID || clockid == CLOCK_THREAD_CPUTIME_ID {
var tm Tms
_, err := Times(&tm)
if err != nil {
return EFAULT
}
ts.Sec = int64(tm.Utime / ticks_per_sec)
ts.Nsec = int64(tm.Utime) * nsec_per_sec / int64(ticks_per_sec)
} else {
return EINVAL
}
return nil
}
func Statfs(path string, stat *Statfs_t) (err error) {
fd, err := open(path, O_RDONLY, 0)
defer Close(fd)
if err != nil {
return err
}
return Fstatfs(fd, stat)
}
var (
Stdin = 0
Stdout = 1
Stderr = 2
)
// Do the interface allocations only once for common
// Errno values.
var (
errEAGAIN error = syscall.EAGAIN
errEINVAL error = syscall.EINVAL
errENOENT error = syscall.ENOENT
)
var (
signalNameMapOnce sync.Once
signalNameMap map[string]syscall.Signal
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e Errno) error {
switch e {
case 0:
return nil
case EAGAIN:
return errEAGAIN
case EINVAL:
return errEINVAL
case ENOENT:
return errENOENT
}
return e
}
// ErrnoName returns the error name for error number e.
func ErrnoName(e Errno) string {
i := sort.Search(len(errorList), func(i int) bool {
return errorList[i].num >= e
})
if i < len(errorList) && errorList[i].num == e {
return errorList[i].name
}
return ""
}
// SignalName returns the signal name for signal number s.
func SignalName(s syscall.Signal) string {
i := sort.Search(len(signalList), func(i int) bool {
return signalList[i].num >= s
})
if i < len(signalList) && signalList[i].num == s {
return signalList[i].name
}
return ""
}
// SignalNum returns the syscall.Signal for signal named s,
// or 0 if a signal with such name is not found.
// The signal name should start with "SIG".
func SignalNum(s string) syscall.Signal {
signalNameMapOnce.Do(func() {
signalNameMap = make(map[string]syscall.Signal, len(signalList))
for _, signal := range signalList {
signalNameMap[signal.name] = signal.num
}
})
return signalNameMap[s]
}
// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte.
func clen(n []byte) int {
i := bytes.IndexByte(n, 0)
if i == -1 {
i = len(n)
}
return i
}
// Mmap manager, for use by operating system-specific implementations.
type mmapper struct {
sync.Mutex
active map[*byte][]byte // active mappings; key is last byte in mapping
mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error)
munmap func(addr uintptr, length uintptr) error
}
func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
if length <= 0 {
return nil, EINVAL
}
// Map the requested memory.
addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset)
if errno != nil {
return nil, errno
}
// Slice memory layout
var sl = struct {
addr uintptr
len int
cap int
}{addr, length, length}
// Use unsafe to turn sl into a []byte.
b := *(*[]byte)(unsafe.Pointer(&sl))
// Register mapping in m and return it.
p := &b[cap(b)-1]
m.Lock()
defer m.Unlock()
m.active[p] = b
return b, nil
}
func (m *mmapper) Munmap(data []byte) (err error) {
if len(data) == 0 || len(data) != cap(data) {
return EINVAL
}
// Find the base of the mapping.
p := &data[cap(data)-1]
m.Lock()
defer m.Unlock()
b := m.active[p]
if b == nil || &b[0] != &data[0] {
return EINVAL
}
// Unmap the memory and update m.
if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil {
return errno
}
delete(m.active, p)
return nil
}
func Read(fd int, p []byte) (n int, err error) {
n, err = read(fd, p)
if raceenabled {
if n > 0 {
raceWriteRange(unsafe.Pointer(&p[0]), n)
}
if err == nil {
raceAcquire(unsafe.Pointer(&ioSync))
}
}
return
}
func Write(fd int, p []byte) (n int, err error) {
if raceenabled {
raceReleaseMerge(unsafe.Pointer(&ioSync))
}
n, err = write(fd, p)
if raceenabled && n > 0 {
raceReadRange(unsafe.Pointer(&p[0]), n)
}
return
}
// For testing: clients can set this flag to force
// creation of IPv6 sockets to return EAFNOSUPPORT.
var SocketDisableIPv6 bool
// Sockaddr represents a socket address.
type Sockaddr interface {
sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs
}
// SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets.
type SockaddrInet4 struct {
Port int
Addr [4]byte
raw RawSockaddrInet4
}
// SockaddrInet6 implements the Sockaddr interface for AF_INET6 type sockets.
type SockaddrInet6 struct {
Port int
ZoneId uint32
Addr [16]byte
raw RawSockaddrInet6
}
// SockaddrUnix implements the Sockaddr interface for AF_UNIX type sockets.
type SockaddrUnix struct {
Name string
raw RawSockaddrUnix
}
func Bind(fd int, sa Sockaddr) (err error) {
ptr, n, err := sa.sockaddr()
if err != nil {
return err
}
return bind(fd, ptr, n)
}
func Connect(fd int, sa Sockaddr) (err error) {
ptr, n, err := sa.sockaddr()
if err != nil {
return err
}
return connect(fd, ptr, n)
}
func Getpeername(fd int) (sa Sockaddr, err error) {
var rsa RawSockaddrAny
var len _Socklen = SizeofSockaddrAny
if err = getpeername(fd, &rsa, &len); err != nil {
return
}
return anyToSockaddr(fd, &rsa)
}
func GetsockoptByte(fd, level, opt int) (value byte, err error) {
var n byte
vallen := _Socklen(1)
err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
return n, err
}
func GetsockoptInt(fd, level, opt int) (value int, err error) {
var n int32
vallen := _Socklen(4)
err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
return int(n), err
}
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 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 GetsockoptLinger(fd, level, opt int) (*Linger, error) {
var linger Linger
vallen := _Socklen(SizeofLinger)
err := getsockopt(fd, level, opt, unsafe.Pointer(&linger), &vallen)
return &linger, err
}
func GetsockoptTimeval(fd, level, opt int) (*Timeval, error) {
var tv Timeval
vallen := _Socklen(unsafe.Sizeof(tv))
err := getsockopt(fd, level, opt, unsafe.Pointer(&tv), &vallen)
return &tv, err
}
func GetsockoptUint64(fd, level, opt int) (value uint64, err error) {
var n uint64
vallen := _Socklen(8)
err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
return n, err
}
func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) {
var rsa RawSockaddrAny
var len _Socklen = SizeofSockaddrAny
if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil {
return
}
if rsa.Addr.Family != AF_UNSPEC {
from, err = anyToSockaddr(fd, &rsa)
}
return
}
func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
ptr, n, err := to.sockaddr()
if err != nil {
return err
}
return sendto(fd, p, flags, ptr, n)
}
func SetsockoptByte(fd, level, opt int, value byte) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1)
}
func SetsockoptInt(fd, level, opt int, value int) (err error) {
var n = int32(value)
return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4)
}
func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4)
}
func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq)
}
func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq)
}
func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error {
return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter)
}
func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger)
}
func SetsockoptString(fd, level, opt int, s string) (err error) {
var p unsafe.Pointer
if len(s) > 0 {
p = unsafe.Pointer(&[]byte(s)[0])
}
return setsockopt(fd, level, opt, p, uintptr(len(s)))
}
func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv))
}
func SetsockoptUint64(fd, level, opt int, value uint64) (err error) {
return setsockopt(fd, level, opt, unsafe.Pointer(&value), 8)
}
func Socket(domain, typ, proto int) (fd int, err error) {
if domain == AF_INET6 && SocketDisableIPv6 {
return -1, EAFNOSUPPORT
}
fd, err = socket(domain, typ, proto)
return
}
func Socketpair(domain, typ, proto int) (fd [2]int, err error) {
var fdx [2]int32
err = socketpair(domain, typ, proto, &fdx)
if err == nil {
fd[0] = int(fdx[0])
fd[1] = int(fdx[1])
}
return
}
var ioSync int64
func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) }
func SetNonblock(fd int, nonblocking bool) (err error) {
flag, err := fcntl(fd, F_GETFL, 0)
if err != nil {
return err
}
if nonblocking {
flag |= O_NONBLOCK
} else {
flag &= ^O_NONBLOCK
}
_, err = fcntl(fd, F_SETFL, flag)
return err
}
// Exec calls execve(2), which replaces the calling executable in the process
// tree. argv0 should be the full path to an executable ("/bin/ls") and the
// executable name should also be the first argument in argv (["ls", "-l"]).
// envv are the environment variables that should be passed to the new
// process (["USER=go", "PWD=/tmp"]).
func Exec(argv0 string, argv []string, envv []string) error {
return syscall.Exec(argv0, argv, envv)
}
func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) {
if needspace := 8 - len(fstype); needspace <= 0 {
fstype = fstype[:8]
} else {
fstype += " "[:needspace]
}
return mount_LE(target, source, fstype, uint32(flags), int32(len(data)), data)
}
func Unmount(name string, mtm int) (err error) {
// mountpoint is always a full path and starts with a '/'
// check if input string is not a mountpoint but a filesystem name
if name[0] != '/' {
return unmount(name, mtm)
}
// treat name as mountpoint
b2s := func(arr []byte) string {
nulli := bytes.IndexByte(arr, 0)
if nulli == -1 {
return string(arr)
} else {
return string(arr[:nulli])
}
}
var buffer struct {
header W_Mnth
fsinfo [64]W_Mntent
}
fsCount, err := W_Getmntent_A((*byte)(unsafe.Pointer(&buffer)), int(unsafe.Sizeof(buffer)))
if err != nil {
return err
}
if fsCount == 0 {
return EINVAL
}
for i := 0; i < fsCount; i++ {
if b2s(buffer.fsinfo[i].Mountpoint[:]) == name {
err = unmount(b2s(buffer.fsinfo[i].Fsname[:]), mtm)
break
}
}
return err
}