rss-tools @ a5ac52722b131734c74504b6e6f4d9900536cac7

// 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

// 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 && sl > 3) {

		// Check sl > 3 so we don't change unnamed socket behavior.

		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 process 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	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)

//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)

}