gtsocial-umbx

syscall_aix.go (16835B)

---

 // Copyright 2018 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 //go:build aix
 // +build aix
 
 // Aix system calls.
 // This file is compiled as ordinary Go code,
 // but it is also input to mksyscall,
 // which parses the //sys lines and generates system call stubs.
 // Note that sometimes we use a lowercase //sys name and
 // wrap it in our own nicer implementation.
 
 package unix
 
 import "unsafe"
 
 /*
  * Wrapped
  */
 
 func Access(path string, mode uint32) (err error) {
 	return Faccessat(AT_FDCWD, path, mode, 0)
 }
 
 func Chmod(path string, mode uint32) (err error) {
 	return Fchmodat(AT_FDCWD, path, mode, 0)
 }
 
 func Chown(path string, uid int, gid int) (err error) {
 	return Fchownat(AT_FDCWD, path, uid, gid, 0)
 }
 
 func Creat(path string, mode uint32) (fd int, err error) {
 	return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode)
 }
 
 //sys	utimes(path string, times *[2]Timeval) (err error)
 
 func Utimes(path string, tv []Timeval) error {
 	if len(tv) != 2 {
 		return EINVAL
 	}
 	return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
 }
 
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
 
 func UtimesNano(path string, ts []Timespec) error {
 	if len(ts) != 2 {
 		return EINVAL
 	}
 	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
 }
 
 func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error {
 	if ts == nil {
 		return utimensat(dirfd, path, nil, flags)
 	}
 	if len(ts) != 2 {
 		return EINVAL
 	}
 	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags)
 }
 
 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	if sa.Port < 0 || sa.Port > 0xFFFF {
 		return nil, 0, EINVAL
 	}
 	sa.raw.Family = AF_INET
 	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
 	p[0] = byte(sa.Port >> 8)
 	p[1] = byte(sa.Port)
 	sa.raw.Addr = sa.Addr
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
 }
 
 func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	if sa.Port < 0 || sa.Port > 0xFFFF {
 		return nil, 0, EINVAL
 	}
 	sa.raw.Family = AF_INET6
 	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
 	p[0] = byte(sa.Port >> 8)
 	p[1] = byte(sa.Port)
 	sa.raw.Scope_id = sa.ZoneId
 	sa.raw.Addr = sa.Addr
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil
 }
 
 func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	name := sa.Name
 	n := len(name)
 	if n > len(sa.raw.Path) {
 		return nil, 0, EINVAL
 	}
 	if n == len(sa.raw.Path) && name[0] != '@' {
 		return nil, 0, EINVAL
 	}
 	sa.raw.Family = AF_UNIX
 	for i := 0; i < n; i++ {
 		sa.raw.Path[i] = uint8(name[i])
 	}
 	// length is family (uint16), name, NUL.
 	sl := _Socklen(2)
 	if n > 0 {
 		sl += _Socklen(n) + 1
 	}
 	if sa.raw.Path[0] == '@' {
 		sa.raw.Path[0] = 0
 		// Don't count trailing NUL for abstract address.
 		sl--
 	}
 
 	return unsafe.Pointer(&sa.raw), sl, nil
 }
 
 func Getsockname(fd int) (sa Sockaddr, err error) {
 	var rsa RawSockaddrAny
 	var len _Socklen = SizeofSockaddrAny
 	if err = getsockname(fd, &rsa, &len); err != nil {
 		return
 	}
 	return anyToSockaddr(fd, &rsa)
 }
 
 //sys	getcwd(buf []byte) (err error)
 
 const ImplementsGetwd = true
 
 func Getwd() (ret string, err error) {
 	for len := uint64(4096); ; len *= 2 {
 		b := make([]byte, len)
 		err := getcwd(b)
 		if err == nil {
 			i := 0
 			for b[i] != 0 {
 				i++
 			}
 			return string(b[0:i]), nil
 		}
 		if err != ERANGE {
 			return "", err
 		}
 	}
 }
 
 func Getcwd(buf []byte) (n int, err error) {
 	err = getcwd(buf)
 	if err == nil {
 		i := 0
 		for buf[i] != 0 {
 			i++
 		}
 		n = i + 1
 	}
 	return
 }
 
 func Getgroups() (gids []int, err error) {
 	n, err := getgroups(0, nil)
 	if err != nil {
 		return nil, err
 	}
 	if n == 0 {
 		return nil, nil
 	}
 
 	// Sanity check group count. Max is 16 on BSD.
 	if n < 0 || n > 1000 {
 		return nil, EINVAL
 	}
 
 	a := make([]_Gid_t, n)
 	n, err = getgroups(n, &a[0])
 	if err != nil {
 		return nil, err
 	}
 	gids = make([]int, n)
 	for i, v := range a[0:n] {
 		gids[i] = int(v)
 	}
 	return
 }
 
 func Setgroups(gids []int) (err error) {
 	if len(gids) == 0 {
 		return setgroups(0, nil)
 	}
 
 	a := make([]_Gid_t, len(gids))
 	for i, v := range gids {
 		a[i] = _Gid_t(v)
 	}
 	return setgroups(len(a), &a[0])
 }
 
 /*
  * Socket
  */
 
 //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
 
 func Accept(fd int) (nfd int, sa Sockaddr, err error) {
 	var rsa RawSockaddrAny
 	var len _Socklen = SizeofSockaddrAny
 	nfd, err = accept(fd, &rsa, &len)
 	if nfd == -1 {
 		return
 	}
 	sa, err = anyToSockaddr(fd, &rsa)
 	if err != nil {
 		Close(nfd)
 		nfd = 0
 	}
 	return
 }
 
 func recvmsgRaw(fd int, iov []Iovec, oob []byte, flags int, rsa *RawSockaddrAny) (n, oobn int, recvflags int, err error) {
 	var msg Msghdr
 	msg.Name = (*byte)(unsafe.Pointer(rsa))
 	msg.Namelen = uint32(SizeofSockaddrAny)
 	var dummy byte
 	if len(oob) > 0 {
 		// receive at least one normal byte
 		if emptyIovecs(iov) {
 			var iova [1]Iovec
 			iova[0].Base = &dummy
 			iova[0].SetLen(1)
 			iov = iova[:]
 		}
 		msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
 		msg.SetControllen(len(oob))
 	}
 	if len(iov) > 0 {
 		msg.Iov = &iov[0]
 		msg.SetIovlen(len(iov))
 	}
 	if n, err = recvmsg(fd, &msg, flags); n == -1 {
 		return
 	}
 	oobn = int(msg.Controllen)
 	recvflags = int(msg.Flags)
 	return
 }
 
 func sendmsgN(fd int, iov []Iovec, oob []byte, ptr unsafe.Pointer, salen _Socklen, flags int) (n int, err error) {
 	var msg Msghdr
 	msg.Name = (*byte)(unsafe.Pointer(ptr))
 	msg.Namelen = uint32(salen)
 	var dummy byte
 	var empty bool
 	if len(oob) > 0 {
 		// send at least one normal byte
 		empty = emptyIovecs(iov)
 		if empty {
 			var iova [1]Iovec
 			iova[0].Base = &dummy
 			iova[0].SetLen(1)
 			iov = iova[:]
 		}
 		msg.Control = (*byte)(unsafe.Pointer(&oob[0]))
 		msg.SetControllen(len(oob))
 	}
 	if len(iov) > 0 {
 		msg.Iov = &iov[0]
 		msg.SetIovlen(len(iov))
 	}
 	if n, err = sendmsg(fd, &msg, flags); err != nil {
 		return 0, err
 	}
 	if len(oob) > 0 && empty {
 		n = 0
 	}
 	return n, nil
 }
 
 func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 	switch rsa.Addr.Family {
 
 	case AF_UNIX:
 		pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
 		sa := new(SockaddrUnix)
 
 		// Some versions of AIX have a bug in getsockname (see IV78655).
 		// We can't rely on sa.Len being set correctly.
 		n := SizeofSockaddrUnix - 3 // subtract leading Family, Len, terminating NUL.
 		for i := 0; i < n; i++ {
 			if pp.Path[i] == 0 {
 				n = i
 				break
 			}
 		}
 		sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n))
 		return sa, nil
 
 	case AF_INET:
 		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
 		sa := new(SockaddrInet4)
 		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
 		sa.Port = int(p[0])<<8 + int(p[1])
 		sa.Addr = pp.Addr
 		return sa, nil
 
 	case AF_INET6:
 		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
 		sa := new(SockaddrInet6)
 		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
 		sa.Port = int(p[0])<<8 + int(p[1])
 		sa.ZoneId = pp.Scope_id
 		sa.Addr = pp.Addr
 		return sa, nil
 	}
 	return nil, EAFNOSUPPORT
 }
 
 func Gettimeofday(tv *Timeval) (err error) {
 	err = gettimeofday(tv, nil)
 	return
 }
 
 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
 	if raceenabled {
 		raceReleaseMerge(unsafe.Pointer(&ioSync))
 	}
 	return sendfile(outfd, infd, offset, count)
 }
 
 // TODO
 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
 	return -1, ENOSYS
 }
 
 func direntIno(buf []byte) (uint64, bool) {
 	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
 }
 
 func direntReclen(buf []byte) (uint64, bool) {
 	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
 }
 
 func direntNamlen(buf []byte) (uint64, bool) {
 	reclen, ok := direntReclen(buf)
 	if !ok {
 		return 0, false
 	}
 	return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
 }
 
 //sys	getdirent(fd int, buf []byte) (n int, err error)
 
 func Getdents(fd int, buf []byte) (n int, err error) {
 	return getdirent(fd, buf)
 }
 
 //sys	wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error)
 
 func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
 	var status _C_int
 	var r Pid_t
 	err = ERESTART
 	// AIX wait4 may return with ERESTART errno, while the processus is still
 	// active.
 	for err == ERESTART {
 		r, err = wait4(Pid_t(pid), &status, options, rusage)
 	}
 	wpid = int(r)
 	if wstatus != nil {
 		*wstatus = WaitStatus(status)
 	}
 	return
 }
 
 /*
  * Wait
  */
 
 type WaitStatus uint32
 
 func (w WaitStatus) Stopped() bool { return w&0x40 != 0 }
 func (w WaitStatus) StopSignal() Signal {
 	if !w.Stopped() {
 		return -1
 	}
 	return Signal(w>>8) & 0xFF
 }
 
 func (w WaitStatus) Exited() bool { return w&0xFF == 0 }
 func (w WaitStatus) ExitStatus() int {
 	if !w.Exited() {
 		return -1
 	}
 	return int((w >> 8) & 0xFF)
 }
 
 func (w WaitStatus) Signaled() bool { return w&0x40 == 0 && w&0xFF != 0 }
 func (w WaitStatus) Signal() Signal {
 	if !w.Signaled() {
 		return -1
 	}
 	return Signal(w>>16) & 0xFF
 }
 
 func (w WaitStatus) Continued() bool { return w&0x01000000 != 0 }
 
 func (w WaitStatus) CoreDump() bool { return w&0x80 == 0x80 }
 
 func (w WaitStatus) TrapCause() int { return -1 }
 
 //sys	ioctl(fd int, req int, arg uintptr) (err error)
 //sys	ioctlPtr(fd int, req int, arg unsafe.Pointer) (err error) = ioctl
 
 // fcntl must never be called with cmd=F_DUP2FD because it doesn't work on AIX
 // There is no way to create a custom fcntl and to keep //sys fcntl easily,
 // Therefore, the programmer must call dup2 instead of fcntl in this case.
 
 // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
 //sys	FcntlInt(fd uintptr, cmd int, arg int) (r int,err error) = fcntl
 
 // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
 //sys	FcntlFlock(fd uintptr, cmd int, lk *Flock_t) (err error) = fcntl
 
 //sys	fcntl(fd int, cmd int, arg int) (val int, err error)
 
 //sys	fsyncRange(fd int, how int, start int64, length int64) (err error) = fsync_range
 
 func Fsync(fd int) error {
 	return fsyncRange(fd, O_SYNC, 0, 0)
 }
 
 /*
  * Direct access
  */
 
 //sys	Acct(path string) (err error)
 //sys	Chdir(path string) (err error)
 //sys	Chroot(path string) (err error)
 //sys	Close(fd int) (err error)
 //sys	Dup(oldfd int) (fd int, err error)
 //sys	Exit(code int)
 //sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
 //sys	Fchdir(fd int) (err error)
 //sys	Fchmod(fd int, mode uint32) (err error)
 //sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
 //sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
 //sys	Fdatasync(fd int) (err error)
 // readdir_r
 //sysnb	Getpgid(pid int) (pgid int, err error)
 
 //sys	Getpgrp() (pid int)
 
 //sysnb	Getpid() (pid int)
 //sysnb	Getppid() (ppid int)
 //sys	Getpriority(which int, who int) (prio int, err error)
 //sysnb	Getrusage(who int, rusage *Rusage) (err error)
 //sysnb	Getsid(pid int) (sid int, err error)
 //sysnb	Kill(pid int, sig Signal) (err error)
 //sys	Klogctl(typ int, buf []byte) (n int, err error) = syslog
 //sys	Mkdir(dirfd int, path string, mode uint32) (err error)
 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
 //sys	Mkfifo(path string, mode uint32) (err error)
 //sys	Mknod(path string, mode uint32, dev int) (err error)
 //sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
 //sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
 //sys	Open(path string, mode int, perm uint32) (fd int, err error) = open64
 //sys	Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
 //sys	read(fd int, p []byte) (n int, err error)
 //sys	Readlink(path string, buf []byte) (n int, err error)
 //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
 //sys	Setdomainname(p []byte) (err error)
 //sys	Sethostname(p []byte) (err error)
 //sysnb	Setpgid(pid int, pgid int) (err error)
 //sysnb	Setsid() (pid int, err error)
 //sysnb	Settimeofday(tv *Timeval) (err error)
 
 //sys	Setuid(uid int) (err error)
 //sys	Setgid(uid int) (err error)
 
 //sys	Setpriority(which int, who int, prio int) (err error)
 //sys	Statx(dirfd int, path string, flags int, mask int, stat *Statx_t) (err error)
 //sys	Sync()
 //sysnb	Times(tms *Tms) (ticks uintptr, err error)
 //sysnb	Umask(mask int) (oldmask int)
 //sysnb	Uname(buf *Utsname) (err error)
 //sys	Unlink(path string) (err error)
 //sys	Unlinkat(dirfd int, path string, flags int) (err error)
 //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	readlen(fd int, p *byte, np int) (n int, err error) = read
 //sys	writelen(fd int, p *byte, np int) (n int, err error) = write
 
 //sys	Dup2(oldfd int, newfd int) (err error)
 //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = posix_fadvise64
 //sys	Fchown(fd int, uid int, gid int) (err error)
 //sys	fstat(fd int, stat *Stat_t) (err error)
 //sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = fstatat
 //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
 //sys	Ftruncate(fd int, length int64) (err error)
 //sysnb	Getegid() (egid int)
 //sysnb	Geteuid() (euid int)
 //sysnb	Getgid() (gid int)
 //sysnb	Getuid() (uid int)
 //sys	Lchown(path string, uid int, gid int) (err error)
 //sys	Listen(s int, n int) (err error)
 //sys	lstat(path string, stat *Stat_t) (err error)
 //sys	Pause() (err error)
 //sys	pread(fd int, p []byte, offset int64) (n int, err error) = pread64
 //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = pwrite64
 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
 //sys	Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error)
 //sysnb	Setregid(rgid int, egid int) (err error)
 //sysnb	Setreuid(ruid int, euid int) (err error)
 //sys	Shutdown(fd int, how int) (err error)
 //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
 //sys	stat(path string, statptr *Stat_t) (err error)
 //sys	Statfs(path string, buf *Statfs_t) (err error)
 //sys	Truncate(path string, length int64) (err error)
 
 //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
 //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)
 //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
 //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
 //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
 
 // In order to use msghdr structure with Control, Controllen, nrecvmsg and nsendmsg must be used.
 //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = nrecvmsg
 //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg
 
 //sys	munmap(addr uintptr, length uintptr) (err error)
 
 var mapper = &mmapper{
 	active: make(map[*byte][]byte),
 	mmap:   mmap,
 	munmap: munmap,
 }
 
 func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
 	return mapper.Mmap(fd, offset, length, prot, flags)
 }
 
 func Munmap(b []byte) (err error) {
 	return mapper.Munmap(b)
 }
 
 //sys	Madvise(b []byte, advice int) (err error)
 //sys	Mprotect(b []byte, prot int) (err error)
 //sys	Mlock(b []byte) (err error)
 //sys	Mlockall(flags int) (err error)
 //sys	Msync(b []byte, flags int) (err error)
 //sys	Munlock(b []byte) (err error)
 //sys	Munlockall() (err error)
 
 //sysnb	pipe(p *[2]_C_int) (err error)
 
 func Pipe(p []int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
 	}
 	var pp [2]_C_int
 	err = pipe(&pp)
 	if err == nil {
 		p[0] = int(pp[0])
 		p[1] = int(pp[1])
 	}
 	return
 }
 
 //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
 
 func Poll(fds []PollFd, timeout int) (n int, err error) {
 	if len(fds) == 0 {
 		return poll(nil, 0, timeout)
 	}
 	return poll(&fds[0], len(fds), timeout)
 }
 
 //sys	gettimeofday(tv *Timeval, tzp *Timezone) (err error)
 //sysnb	Time(t *Time_t) (tt Time_t, err error)
 //sys	Utime(path string, buf *Utimbuf) (err error)
 
 //sys	Getsystemcfg(label int) (n uint64)
 
 //sys	umount(target string) (err error)
 
 func Unmount(target string, flags int) (err error) {
 	if flags != 0 {
 		// AIX doesn't have any flags for umount.
 		return ENOSYS
 	}
 	return umount(target)
 }