diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_zos_s390x.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_zos_s390x.go | 1823 |
1 files changed, 1823 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go b/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go new file mode 100644 index 0000000..f8616f4 --- /dev/null +++ b/vendor/golang.org/x/sys/unix/syscall_zos_s390x.go @@ -0,0 +1,1823 @@ +// 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 +} |