Update github.com/hashicorp/hcl

hashicorp/hcl library added some better validation for error and illegal
characters.  The diff is primarily improved error reporting.  The
parser.go change includes a case where illegal characters were silently
dropped, but now get reported as invalid characters.

vendor/github.com/creack/pty/Dockerfile.riscv

@@ -0,0 +1,14 @@
+FROM golang:1.13
+
+# Clone and complie a riscv compatible version of the go compiler.
+RUN git clone https://review.gerrithub.io/riscv/riscv-go /riscv-go
+# riscvdev branch HEAD as of 2019-06-29.
+RUN cd /riscv-go && git checkout 04885fddd096d09d4450726064d06dd107e374bf
+ENV PATH=/riscv-go/misc/riscv:/riscv-go/bin:$PATH
+RUN cd /riscv-go/src && GOROOT_BOOTSTRAP=$(go env GOROOT) ./make.bash
+ENV GOROOT=/riscv-go
+
+# Make sure we compile.
+WORKDIR pty
+ADD . .
+RUN GOOS=linux GOARCH=riscv go build

vendor/github.com/creack/pty/LICENSE

@@ -0,0 +1,23 @@
+Copyright (c) 2011 Keith Rarick
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall
+be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/creack/pty/README.md

@@ -0,0 +1,100 @@
+# pty
+
+Pty is a Go package for using unix pseudo-terminals.
+
+## Install
+
+    go get github.com/creack/pty
+
+## Example
+
+### Command
+
+```go
+package main
+
+import (
+	"github.com/creack/pty"
+	"io"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	c := exec.Command("grep", "--color=auto", "bar")
+	f, err := pty.Start(c)
+	if err != nil {
+		panic(err)
+	}
+
+	go func() {
+		f.Write([]byte("foo\n"))
+		f.Write([]byte("bar\n"))
+		f.Write([]byte("baz\n"))
+		f.Write([]byte{4}) // EOT
+	}()
+	io.Copy(os.Stdout, f)
+}
+```
+
+### Shell
+
+```go
+package main
+
+import (
+        "io"
+        "log"
+        "os"
+        "os/exec"
+        "os/signal"
+        "syscall"
+
+        "github.com/creack/pty"
+        "golang.org/x/crypto/ssh/terminal"
+)
+
+func test() error {
+        // Create arbitrary command.
+        c := exec.Command("bash")
+
+        // Start the command with a pty.
+        ptmx, err := pty.Start(c)
+        if err != nil {
+                return err
+        }
+        // Make sure to close the pty at the end.
+        defer func() { _ = ptmx.Close() }() // Best effort.
+
+        // Handle pty size.
+        ch := make(chan os.Signal, 1)
+        signal.Notify(ch, syscall.SIGWINCH)
+        go func() {
+                for range ch {
+                        if err := pty.InheritSize(os.Stdin, ptmx); err != nil {
+                                log.Printf("error resizing pty: %s", err)
+                        }
+                }
+        }()
+        ch <- syscall.SIGWINCH // Initial resize.
+
+        // Set stdin in raw mode.
+        oldState, err := terminal.MakeRaw(int(os.Stdin.Fd()))
+        if err != nil {
+                panic(err)
+        }
+        defer func() { _ = terminal.Restore(int(os.Stdin.Fd()), oldState) }() // Best effort.
+
+        // Copy stdin to the pty and the pty to stdout.
+        go func() { _, _ = io.Copy(ptmx, os.Stdin) }()
+        _, _ = io.Copy(os.Stdout, ptmx)
+
+        return nil
+}
+
+func main() {
+        if err := test(); err != nil {
+                log.Fatal(err)
+        }
+}
+```

vendor/github.com/creack/pty/doc.go

@@ -0,0 +1,16 @@
+// Package pty provides functions for working with Unix terminals.
+package pty
+
+import (
+	"errors"
+	"os"
+)
+
+// ErrUnsupported is returned if a function is not
+// available on the current platform.
+var ErrUnsupported = errors.New("unsupported")
+
+// Opens a pty and its corresponding tty.
+func Open() (pty, tty *os.File, err error) {
+	return open()
+}

vendor/github.com/creack/pty/go.mod

@@ -0,0 +1,4 @@
+module github.com/creack/pty
+
+go 1.13
+

vendor/github.com/creack/pty/ioctl.go

@@ -0,0 +1,13 @@
+// +build !windows,!solaris
+
+package pty
+
+import "syscall"
+
+func ioctl(fd, cmd, ptr uintptr) error {
+	_, _, e := syscall.Syscall(syscall.SYS_IOCTL, fd, cmd, ptr)
+	if e != 0 {
+		return e
+	}
+	return nil
+}

vendor/github.com/creack/pty/ioctl_bsd.go

@@ -0,0 +1,39 @@
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package pty
+
+// from <sys/ioccom.h>
+const (
+	_IOC_VOID    uintptr = 0x20000000
+	_IOC_OUT     uintptr = 0x40000000
+	_IOC_IN      uintptr = 0x80000000
+	_IOC_IN_OUT  uintptr = _IOC_OUT | _IOC_IN
+	_IOC_DIRMASK         = _IOC_VOID | _IOC_OUT | _IOC_IN
+
+	_IOC_PARAM_SHIFT = 13
+	_IOC_PARAM_MASK  = (1 << _IOC_PARAM_SHIFT) - 1
+)
+
+func _IOC_PARM_LEN(ioctl uintptr) uintptr {
+	return (ioctl >> 16) & _IOC_PARAM_MASK
+}
+
+func _IOC(inout uintptr, group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return inout | (param_len&_IOC_PARAM_MASK)<<16 | uintptr(group)<<8 | ioctl_num
+}
+
+func _IO(group byte, ioctl_num uintptr) uintptr {
+	return _IOC(_IOC_VOID, group, ioctl_num, 0)
+}
+
+func _IOR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_OUT, group, ioctl_num, param_len)
+}
+
+func _IOW(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN, group, ioctl_num, param_len)
+}
+
+func _IOWR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN_OUT, group, ioctl_num, param_len)
+}

vendor/github.com/creack/pty/ioctl_solaris.go

@@ -0,0 +1,30 @@
+package pty
+
+import (
+	"golang.org/x/sys/unix"
+	"unsafe"
+)
+
+const (
+	// see /usr/include/sys/stropts.h
+	I_PUSH  = uintptr((int32('S')<<8 | 002))
+	I_STR   = uintptr((int32('S')<<8 | 010))
+	I_FIND  = uintptr((int32('S')<<8 | 013))
+	// see /usr/include/sys/ptms.h
+	ISPTM   = (int32('P') << 8) | 1
+	UNLKPT  = (int32('P') << 8) | 2
+	PTSSTTY = (int32('P') << 8) | 3
+	ZONEPT  = (int32('P') << 8) | 4
+	OWNERPT = (int32('P') << 8) | 5
+)
+
+type strioctl struct {
+	ic_cmd    int32
+	ic_timout int32
+	ic_len    int32
+	ic_dp     unsafe.Pointer
+}
+
+func ioctl(fd, cmd, ptr uintptr) error {
+	return unix.IoctlSetInt(int(fd), uint(cmd), int(ptr))
+}

vendor/github.com/creack/pty/mktypes.bash

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+GOOSARCH="${GOOS}_${GOARCH}"
+case "$GOOSARCH" in
+_* | *_ | _)
+	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
+	exit 1
+	;;
+esac
+
+GODEFS="go tool cgo -godefs"
+
+$GODEFS types.go |gofmt > ztypes_$GOARCH.go
+
+case $GOOS in
+freebsd|dragonfly|openbsd)
+	$GODEFS types_$GOOS.go |gofmt > ztypes_$GOOSARCH.go
+	;;
+esac

vendor/github.com/creack/pty/pty_darwin.go

@@ -0,0 +1,65 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	pFD, err := syscall.Open("/dev/ptmx", syscall.O_RDWR|syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	p := os.NewFile(uintptr(pFD), "/dev/ptmx")
+	// In case of error after this point, make sure we close the ptmx fd.
+	defer func() {
+		if err != nil {
+			_ = p.Close() // Best effort.
+		}
+	}()
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if err := grantpt(p); err != nil {
+		return nil, nil, err
+	}
+
+	if err := unlockpt(p); err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	n := make([]byte, _IOC_PARM_LEN(syscall.TIOCPTYGNAME))
+
+	err := ioctl(f.Fd(), syscall.TIOCPTYGNAME, uintptr(unsafe.Pointer(&n[0])))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range n {
+		if c == 0 {
+			return string(n[:i]), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}
+
+func grantpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYGRANT, 0)
+}
+
+func unlockpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYUNLK, 0)
+}

vendor/github.com/creack/pty/pty_dragonfly.go

@@ -0,0 +1,80 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+// same code as pty_darwin.go
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	// In case of error after this point, make sure we close the ptmx fd.
+	defer func() {
+		if err != nil {
+			_ = p.Close() // Best effort.
+		}
+	}()
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if err := grantpt(p); err != nil {
+		return nil, nil, err
+	}
+
+	if err := unlockpt(p); err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func grantpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func unlockpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCISPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctl_FIODNAME    = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	name := make([]byte, _C_SPECNAMELEN)
+	fa := fiodgnameArg{Name: (*byte)(unsafe.Pointer(&name[0])), Len: _C_SPECNAMELEN, Pad_cgo_0: [4]byte{0, 0, 0, 0}}
+
+	err := ioctl(f.Fd(), ioctl_FIODNAME, uintptr(unsafe.Pointer(&fa)))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range name {
+		if c == 0 {
+			s := "/dev/" + string(name[:i])
+			return strings.Replace(s, "ptm", "pts", -1), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}

vendor/github.com/creack/pty/pty_freebsd.go

@@ -0,0 +1,78 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func posixOpenpt(oflag int) (fd int, err error) {
+	r0, _, e1 := syscall.Syscall(syscall.SYS_POSIX_OPENPT, uintptr(oflag), 0, 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return fd, err
+}
+
+func open() (pty, tty *os.File, err error) {
+	fd, err := posixOpenpt(syscall.O_RDWR | syscall.O_CLOEXEC)
+	if err != nil {
+		return nil, nil, err
+	}
+	p := os.NewFile(uintptr(fd), "/dev/pts")
+	// In case of error after this point, make sure we close the pts fd.
+	defer func() {
+		if err != nil {
+			_ = p.Close() // Best effort.
+		}
+	}()
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile("/dev/"+sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctlFIODGNAME    = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	master, err := isptmaster(f.Fd())
+	if err != nil {
+		return "", err
+	}
+	if !master {
+		return "", syscall.EINVAL
+	}
+
+	const n = _C_SPECNAMELEN + 1
+	var (
+		buf = make([]byte, n)
+		arg = fiodgnameArg{Len: n, Buf: (*byte)(unsafe.Pointer(&buf[0]))}
+	)
+	if err := ioctl(f.Fd(), ioctlFIODGNAME, uintptr(unsafe.Pointer(&arg))); err != nil {
+		return "", err
+	}
+
+	for i, c := range buf {
+		if c == 0 {
+			return string(buf[:i]), nil
+		}
+	}
+	return "", errors.New("FIODGNAME string not NUL-terminated")
+}

vendor/github.com/creack/pty/pty_linux.go

@@ -0,0 +1,51 @@
+package pty
+
+import (
+	"os"
+	"strconv"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	// In case of error after this point, make sure we close the ptmx fd.
+	defer func() {
+		if err != nil {
+			_ = p.Close() // Best effort.
+		}
+	}()
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if err := unlockpt(p); err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR|syscall.O_NOCTTY, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	var n _C_uint
+	err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n)))
+	if err != nil {
+		return "", err
+	}
+	return "/dev/pts/" + strconv.Itoa(int(n)), nil
+}
+
+func unlockpt(f *os.File) error {
+	var u _C_int
+	// use TIOCSPTLCK with a pointer to zero to clear the lock
+	return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}

vendor/github.com/creack/pty/pty_openbsd.go

@@ -0,0 +1,33 @@
+package pty
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	/*
+	 * from ptm(4):
+	 * The PTMGET command allocates a free pseudo terminal, changes its
+	 * ownership to the caller, revokes the access privileges for all previous
+	 * users, opens the file descriptors for the pty and tty devices and
+	 * returns them to the caller in struct ptmget.
+	 */
+
+	p, err := os.OpenFile("/dev/ptm", os.O_RDWR|syscall.O_CLOEXEC, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	defer p.Close()
+
+	var ptm ptmget
+	if err := ioctl(p.Fd(), uintptr(ioctl_PTMGET), uintptr(unsafe.Pointer(&ptm))); err != nil {
+		return nil, nil, err
+	}
+
+	pty = os.NewFile(uintptr(ptm.Cfd), "/dev/ptm")
+	tty = os.NewFile(uintptr(ptm.Sfd), "/dev/ptm")
+
+	return pty, tty, nil
+}

vendor/github.com/creack/pty/pty_solaris.go

@@ -0,0 +1,139 @@
+package pty
+
+/* based on:
+http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libc/port/gen/pt.c
+*/
+
+import (
+	"errors"
+	"golang.org/x/sys/unix"
+	"os"
+	"strconv"
+	"syscall"
+	"unsafe"
+)
+
+const NODEV = ^uint64(0)
+
+func open() (pty, tty *os.File, err error) {
+	masterfd, err := syscall.Open("/dev/ptmx", syscall.O_RDWR|unix.O_NOCTTY, 0)
+	//masterfd, err := syscall.Open("/dev/ptmx", syscall.O_RDWR|syscall.O_CLOEXEC|unix.O_NOCTTY, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	p := os.NewFile(uintptr(masterfd), "/dev/ptmx")
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = grantpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	slavefd, err := syscall.Open(sname, os.O_RDWR|unix.O_NOCTTY, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	t := os.NewFile(uintptr(slavefd), sname)
+
+	// pushing terminal driver STREAMS modules as per pts(7)
+	for _, mod := range([]string{"ptem", "ldterm", "ttcompat"}) {
+		err = streams_push(t, mod)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+	
+	return p, t, nil
+}
+
+func minor(x uint64) uint64 {
+	return x & 0377
+}
+
+func ptsdev(fd uintptr) uint64 {
+	istr := strioctl{ISPTM, 0, 0, nil}
+	err := ioctl(fd, I_STR, uintptr(unsafe.Pointer(&istr)))
+	if err != nil {
+		return NODEV
+	}
+	var status unix.Stat_t
+	err = unix.Fstat(int(fd), &status)
+	if err != nil {
+		return NODEV
+	}
+	return uint64(minor(status.Rdev))
+}
+
+func ptsname(f *os.File) (string, error) {
+	dev := ptsdev(f.Fd())
+	if dev == NODEV {
+		return "", errors.New("not a master pty")
+	}
+	fn := "/dev/pts/" + strconv.FormatInt(int64(dev), 10)
+	// access(2) creates the slave device (if the pty exists)
+	// F_OK == 0 (unistd.h)
+	err := unix.Access(fn, 0)
+	if err != nil {
+		return "", err
+	}
+	return fn, nil
+}
+
+type pt_own struct {
+	pto_ruid int32
+	pto_rgid int32
+}
+
+func grantpt(f *os.File) error {
+	if ptsdev(f.Fd()) == NODEV {
+		return errors.New("not a master pty")
+	}
+	var pto pt_own
+	pto.pto_ruid = int32(os.Getuid())
+	// XXX should first attempt to get gid of DEFAULT_TTY_GROUP="tty"
+	pto.pto_rgid = int32(os.Getgid())
+	var istr strioctl
+	istr.ic_cmd = OWNERPT
+	istr.ic_timout = 0
+	istr.ic_len = int32(unsafe.Sizeof(istr))
+	istr.ic_dp = unsafe.Pointer(&pto)
+	err := ioctl(f.Fd(), I_STR, uintptr(unsafe.Pointer(&istr)))
+	if err != nil {
+		return errors.New("access denied")
+	}
+	return nil
+}
+
+func unlockpt(f *os.File) error {
+	istr := strioctl{UNLKPT, 0, 0, nil}
+	return ioctl(f.Fd(), I_STR, uintptr(unsafe.Pointer(&istr)))
+}
+
+// push STREAMS modules if not already done so
+func streams_push(f *os.File, mod string) error {
+	var err error
+	buf := []byte(mod)
+	// XXX I_FIND is not returning an error when the module
+	// is already pushed even though truss reports a return
+	// value of 1. A bug in the Go Solaris syscall interface?
+	// XXX without this we are at risk of the issue
+	// https://www.illumos.org/issues/9042
+	// but since we are not using libc or XPG4.2, we should not be
+	// double-pushing modules
+	
+	err = ioctl(f.Fd(), I_FIND, uintptr(unsafe.Pointer(&buf[0])))
+	if err != nil {
+		return nil
+	}
+	err = ioctl(f.Fd(), I_PUSH, uintptr(unsafe.Pointer(&buf[0])))
+	return err
+}

vendor/github.com/creack/pty/pty_unsupported.go

@@ -0,0 +1,11 @@
+// +build !linux,!darwin,!freebsd,!dragonfly,!openbsd,!solaris
+
+package pty
+
+import (
+	"os"
+)
+
+func open() (pty, tty *os.File, err error) {
+	return nil, nil, ErrUnsupported
+}

vendor/github.com/creack/pty/run.go

@@ -0,0 +1,57 @@
+// +build !windows
+
+package pty
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// Start assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+func Start(c *exec.Cmd) (pty *os.File, err error) {
+	return StartWithSize(c, nil)
+}
+
+// StartWithSize assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+//
+// This will resize the pty to the specified size before starting the command
+func StartWithSize(c *exec.Cmd, sz *Winsize) (pty *os.File, err error) {
+	pty, tty, err := Open()
+	if err != nil {
+		return nil, err
+	}
+	defer tty.Close()
+	if sz != nil {
+		err = Setsize(pty, sz)
+		if err != nil {
+			pty.Close()
+			return nil, err
+		}
+	}
+	if c.Stdout == nil {
+		c.Stdout = tty
+	}
+	if c.Stderr == nil {
+		c.Stderr = tty
+	}
+	if c.Stdin == nil {
+		c.Stdin = tty
+	}
+	if c.SysProcAttr == nil {
+		c.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	c.SysProcAttr.Setctty = true
+	c.SysProcAttr.Setsid = true
+	c.SysProcAttr.Ctty = int(tty.Fd())
+	err = c.Start()
+	if err != nil {
+		pty.Close()
+		return nil, err
+	}
+	return pty, err
+}

vendor/github.com/creack/pty/test_crosscompile.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env sh
+
+# Test script checking that all expected os/arch compile properly.
+# Does not actually test the logic, just the compilation so we make sure we don't break code depending on the lib.
+
+echo2() {
+    echo $@ >&2
+}
+
+trap end 0
+end() {
+    [ "$?" = 0 ] && echo2 "Pass." || (echo2 "Fail."; exit 1)
+}
+
+cross() {
+    os=$1
+    shift
+    echo2 "Build for $os."
+    for arch in $@; do
+	echo2 "  - $os/$arch"
+	GOOS=$os GOARCH=$arch go build
+    done
+    echo2
+}
+
+set -e
+
+cross linux     amd64 386 arm arm64 ppc64 ppc64le s390x mips mipsle mips64 mips64le
+cross darwin    amd64 386 arm arm64
+cross freebsd   amd64 386 arm
+cross netbsd    amd64 386 arm
+cross openbsd   amd64 386
+cross dragonfly amd64
+cross solaris   amd64
+
+# Not expected to work but should still compile.
+cross windows amd64 386 arm
+
+# TODO: Fix compilation error on openbsd/arm.
+# TODO: Merge the solaris PR.
+
+# Some os/arch require a different compiler. Run in docker.
+if ! hash docker; then
+    # If docker is not present, stop here.
+    return
+fi
+
+echo2 "Build for linux."
+echo2 "  - linux/riscv"
+docker build -t test -f Dockerfile.riscv .

vendor/github.com/creack/pty/util.go

@@ -0,0 +1,64 @@
+// +build !windows,!solaris
+
+package pty
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// InheritSize applies the terminal size of pty to tty. This should be run
+// in a signal handler for syscall.SIGWINCH to automatically resize the tty when
+// the pty receives a window size change notification.
+func InheritSize(pty, tty *os.File) error {
+	size, err := GetsizeFull(pty)
+	if err != nil {
+		return err
+	}
+	err = Setsize(tty, size)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Setsize resizes t to s.
+func Setsize(t *os.File, ws *Winsize) error {
+	return windowRectCall(ws, t.Fd(), syscall.TIOCSWINSZ)
+}
+
+// GetsizeFull returns the full terminal size description.
+func GetsizeFull(t *os.File) (size *Winsize, err error) {
+	var ws Winsize
+	err = windowRectCall(&ws, t.Fd(), syscall.TIOCGWINSZ)
+	return &ws, err
+}
+
+// Getsize returns the number of rows (lines) and cols (positions
+// in each line) in terminal t.
+func Getsize(t *os.File) (rows, cols int, err error) {
+	ws, err := GetsizeFull(t)
+	return int(ws.Rows), int(ws.Cols), err
+}
+
+// Winsize describes the terminal size.
+type Winsize struct {
+	Rows uint16 // ws_row: Number of rows (in cells)
+	Cols uint16 // ws_col: Number of columns (in cells)
+	X    uint16 // ws_xpixel: Width in pixels
+	Y    uint16 // ws_ypixel: Height in pixels
+}
+
+func windowRectCall(ws *Winsize, fd, a2 uintptr) error {
+	_, _, errno := syscall.Syscall(
+		syscall.SYS_IOCTL,
+		fd,
+		a2,
+		uintptr(unsafe.Pointer(ws)),
+	)
+	if errno != 0 {
+		return syscall.Errno(errno)
+	}
+	return nil
+}

vendor/github.com/creack/pty/util_solaris.go

@@ -0,0 +1,51 @@
+//
+
+package pty
+
+import (
+	"os"
+	"golang.org/x/sys/unix"
+)
+
+const (
+	TIOCGWINSZ = 21608 // 'T' << 8 | 104
+	TIOCSWINSZ = 21607 // 'T' << 8 | 103
+)
+
+// Winsize describes the terminal size.
+type Winsize struct {
+	Rows uint16 // ws_row: Number of rows (in cells)
+	Cols uint16 // ws_col: Number of columns (in cells)
+	X    uint16 // ws_xpixel: Width in pixels
+	Y    uint16 // ws_ypixel: Height in pixels
+}
+
+// GetsizeFull returns the full terminal size description.
+func GetsizeFull(t *os.File) (size *Winsize, err error) {
+	var wsz *unix.Winsize
+	wsz, err = unix.IoctlGetWinsize(int(t.Fd()), TIOCGWINSZ)
+
+	if err != nil {
+		return nil, err
+	} else {
+		return &Winsize{wsz.Row, wsz.Col, wsz.Xpixel, wsz.Ypixel}, nil
+	}
+}
+
+// Get Windows Size
+func Getsize(t *os.File) (rows, cols int, err error) {
+	var wsz *unix.Winsize
+	wsz, err = unix.IoctlGetWinsize(int(t.Fd()), TIOCGWINSZ)
+
+	if err != nil {
+		return 80, 25, err
+	} else {
+		return int(wsz.Row), int(wsz.Col), nil
+	}
+}
+
+// Setsize resizes t to s.
+func Setsize(t *os.File, ws *Winsize) error {
+	wsz := unix.Winsize{ws.Rows, ws.Cols, ws.X, ws.Y}
+	return unix.IoctlSetWinsize(int(t.Fd()), TIOCSWINSZ, &wsz)
+}

vendor/github.com/creack/pty/ztypes_386.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_amd64.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_arm.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_arm64.go

@@ -0,0 +1,11 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build arm64
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_dragonfly_amd64.go

@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_dragonfly.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Name      *byte
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}

vendor/github.com/creack/pty/ztypes_freebsd_386.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}

vendor/github.com/creack/pty/ztypes_freebsd_amd64.go

@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len       int32
+	Pad_cgo_0 [4]byte
+	Buf       *byte
+}

vendor/github.com/creack/pty/ztypes_freebsd_arm.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}

vendor/github.com/creack/pty/ztypes_freebsd_arm64.go

@@ -0,0 +1,13 @@
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0xff
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}

vendor/github.com/creack/pty/ztypes_mipsx.go

@@ -0,0 +1,12 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build linux
+// +build mips mipsle mips64 mips64le
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_openbsd_386.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_openbsd.go
+
+package pty
+
+type ptmget struct {
+	Cfd	int32
+	Sfd	int32
+	Cn	[16]int8
+	Sn	[16]int8
+}
+
+var ioctl_PTMGET = 0x40287401

vendor/github.com/creack/pty/ztypes_openbsd_amd64.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_openbsd.go
+
+package pty
+
+type ptmget struct {
+	Cfd int32
+	Sfd int32
+	Cn  [16]int8
+	Sn  [16]int8
+}
+
+var ioctl_PTMGET = 0x40287401

vendor/github.com/creack/pty/ztypes_ppc64.go

@@ -0,0 +1,11 @@
+// +build ppc64
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_ppc64le.go

@@ -0,0 +1,11 @@
+// +build ppc64le
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_riscvx.go

@@ -0,0 +1,11 @@
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
+// cgo -godefs types.go
+
+// +build riscv riscv64
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/creack/pty/ztypes_s390x.go

@@ -0,0 +1,11 @@
+// +build s390x
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/hashicorp/hcl/hcl/parser/parser.go

@@ -3,6 +3,7 @@
 package parser
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"strings"
@@ -36,6 +37,11 @@ func newParser(src []byte) *Parser {
 
 // Parse returns the fully parsed source and returns the abstract syntax tree.
 func Parse(src []byte) (*ast.File, error) {
+	// normalize all line endings
+	// since the scanner and output only work with "\n" line endings, we may
+	// end up with dangling "\r" characters in the parsed data.
+	src = bytes.Replace(src, []byte("\r\n"), []byte("\n"), -1)
+
 	p := newParser(src)
 	return p.Parse()
 }
@@ -191,9 +197,18 @@ func (p *Parser) objectItem() (*ast.ObjectItem, error) {
 			keyStr = append(keyStr, k.Token.Text)
 		}
 
-		return nil, fmt.Errorf(
-			"key '%s' expected start of object ('{') or assignment ('=')",
-			strings.Join(keyStr, " "))
+		return nil, &PosError{
+			Pos: p.tok.Pos,
+			Err: fmt.Errorf(
+				"key '%s' expected start of object ('{') or assignment ('=')",
+				strings.Join(keyStr, " ")),
+		}
+	}
+
+	// key=#comment
+	// val
+	if p.lineComment != nil {
+		o.LineComment, p.lineComment = p.lineComment, nil
 	}
 
 	// do a look-ahead for line comment
@@ -256,7 +271,10 @@ func (p *Parser) objectKey() ([]*ast.ObjectKey, error) {
 			keyCount++
 			keys = append(keys, &ast.ObjectKey{Token: p.tok})
 		case token.ILLEGAL:
-			fmt.Println("illegal")
+			return keys, &PosError{
+				Pos: p.tok.Pos,
+				Err: fmt.Errorf("illegal character"),
+			}
 		default:
 			return keys, &PosError{
 				Pos: p.tok.Pos,
@@ -310,7 +328,10 @@ func (p *Parser) objectType() (*ast.ObjectType, error) {
 
 	// No error, scan and expect the ending to be a brace
 	if tok := p.scan(); tok.Type != token.RBRACE {
-		return nil, fmt.Errorf("object expected closing RBRACE got: %s", tok.Type)
+		return nil, &PosError{
+			Pos: tok.Pos,
+			Err: fmt.Errorf("object expected closing RBRACE got: %s", tok.Type),
+		}
 	}
 
 	o.List = l
@@ -343,7 +364,7 @@ func (p *Parser) listType() (*ast.ListType, error) {
 			}
 		}
 		switch tok.Type {
-		case token.NUMBER, token.FLOAT, token.STRING, token.HEREDOC:
+		case token.BOOL, token.NUMBER, token.FLOAT, token.STRING, token.HEREDOC:
 			node, err := p.literalType()
 			if err != nil {
 				return nil, err
@@ -385,12 +406,16 @@ func (p *Parser) listType() (*ast.ListType, error) {
 			}
 			l.Add(node)
 			needComma = true
-		case token.BOOL:
-			// TODO(arslan) should we support? not supported by HCL yet
 		case token.LBRACK:
-			// TODO(arslan) should we support nested lists? Even though it's
-			// written in README of HCL, it's not a part of the grammar
-			// (not defined in parse.y)
+			node, err := p.listType()
+			if err != nil {
+				return nil, &PosError{
+					Pos: tok.Pos,
+					Err: fmt.Errorf(
+						"error while trying to parse list within list: %s", err),
+				}
+			}
+			l.Add(node)
 		case token.RBRACK:
 			// finished
 			l.Rbrack = p.tok.Pos

vendor/github.com/hashicorp/hcl/hcl/scanner/scanner.go

@@ -74,14 +74,6 @@ func (s *Scanner) next() rune {
 		return eof
 	}
 
-	if ch == utf8.RuneError && size == 1 {
-		s.srcPos.Column++
-		s.srcPos.Offset += size
-		s.lastCharLen = size
-		s.err("illegal UTF-8 encoding")
-		return ch
-	}
-
 	// remember last position
 	s.prevPos = s.srcPos
 
@@ -89,12 +81,27 @@ func (s *Scanner) next() rune {
 	s.lastCharLen = size
 	s.srcPos.Offset += size
 
+	if ch == utf8.RuneError && size == 1 {
+		s.err("illegal UTF-8 encoding")
+		return ch
+	}
+
 	if ch == '\n' {
 		s.srcPos.Line++
 		s.lastLineLen = s.srcPos.Column
 		s.srcPos.Column = 0
 	}
 
+	if ch == '\x00' {
+		s.err("unexpected null character (0x00)")
+		return eof
+	}
+
+	if ch == '\uE123' {
+		s.err("unicode code point U+E123 reserved for internal use")
+		return utf8.RuneError
+	}
+
 	// debug
 	// fmt.Printf("ch: %q, offset:column: %d:%d\n", ch, s.srcPos.Offset, s.srcPos.Column)
 	return ch
@@ -345,7 +352,7 @@ func (s *Scanner) scanNumber(ch rune) token.Type {
 	return token.NUMBER
 }
 
-// scanMantissa scans the mantissa begining from the rune. It returns the next
+// scanMantissa scans the mantissa beginning from the rune. It returns the next
 // non decimal rune. It's used to determine wheter it's a fraction or exponent.
 func (s *Scanner) scanMantissa(ch rune) rune {
 	scanned := false
@@ -426,16 +433,16 @@ func (s *Scanner) scanHeredoc() {
 
 	// Read the identifier
 	identBytes := s.src[offs : s.srcPos.Offset-s.lastCharLen]
-	if len(identBytes) == 0 {
+	if len(identBytes) == 0 || (len(identBytes) == 1 && identBytes[0] == '-') {
 		s.err("zero-length heredoc anchor")
 		return
 	}
 
 	var identRegexp *regexp.Regexp
 	if identBytes[0] == '-' {
-		identRegexp = regexp.MustCompile(fmt.Sprintf(`[[:space:]]*%s\z`, identBytes[1:]))
+		identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes[1:]))
 	} else {
-		identRegexp = regexp.MustCompile(fmt.Sprintf(`[[:space:]]*%s\z`, identBytes))
+		identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes))
 	}
 
 	// Read the actual string value
@@ -474,7 +481,7 @@ func (s *Scanner) scanString() {
 		// read character after quote
 		ch := s.next()
 
-		if ch < 0 || ch == eof {
+		if (ch == '\n' && braces == 0) || ch < 0 || ch == eof {
 			s.err("literal not terminated")
 			return
 		}
@@ -545,7 +552,7 @@ func (s *Scanner) scanDigits(ch rune, base, n int) rune {
 		s.err("illegal char escape")
 	}
 
-	if n != start {
+	if n != start && ch != eof {
 		// we scanned all digits, put the last non digit char back,
 		// only if we read anything at all
 		s.unread()

vendor/github.com/hashicorp/hcl/hcl/strconv/quote.go

@@ -27,6 +27,9 @@ func Unquote(s string) (t string, err error) {
 	if quote != '"' {
 		return "", ErrSyntax
 	}
+	if !contains(s, '$') && !contains(s, '{') && contains(s, '\n') {
+		return "", ErrSyntax
+	}
 
 	// Is it trivial?  Avoid allocation.
 	if !contains(s, '\\') && !contains(s, quote) && !contains(s, '$') {
@@ -46,7 +49,7 @@ func Unquote(s string) (t string, err error) {
 	for len(s) > 0 {
 		// If we're starting a '${}' then let it through un-unquoted.
 		// Specifically: we don't unquote any characters within the `${}`
-		// section, except for escaped backslashes, which we handle specifically.
+		// section.
 		if s[0] == '$' && len(s) > 1 && s[1] == '{' {
 			buf = append(buf, '$', '{')
 			s = s[2:]
@@ -61,16 +64,6 @@ func Unquote(s string) (t string, err error) {
 
 				s = s[size:]
 
-				// We special case escaped backslashes in interpolations, converting
-				// them to their unescaped equivalents.
-				if r == '\\' {
-					q, _ := utf8.DecodeRuneInString(s)
-					switch q {
-					case '\\':
-						continue
-					}
-				}
-
 				n := utf8.EncodeRune(runeTmp[:], r)
 				buf = append(buf, runeTmp[:n]...)
 
@@ -94,6 +87,10 @@ func Unquote(s string) (t string, err error) {
 			}
 		}
 
+		if s[0] == '\n' {
+			return "", ErrSyntax
+		}
+
 		c, multibyte, ss, err := unquoteChar(s, quote)
 		if err != nil {
 			return "", err

vendor/github.com/hashicorp/hcl/json/parser/parser.go

@@ -147,7 +147,7 @@ func (p *Parser) objectKey() ([]*ast.ObjectKey, error) {
 			// Done
 			return keys, nil
 		case token.ILLEGAL:
-			fmt.Println("illegal")
+			return nil, errors.New("illegal")
 		default:
 			return nil, fmt.Errorf("expected: STRING got: %s", p.tok.Type)
 		}

vendor/github.com/hashicorp/hcl/json/scanner/scanner.go

@@ -246,7 +246,7 @@ func (s *Scanner) scanNumber(ch rune) token.Type {
 	return token.NUMBER
 }
 
-// scanMantissa scans the mantissa begining from the rune. It returns the next
+// scanMantissa scans the mantissa beginning from the rune. It returns the next
 // non decimal rune. It's used to determine wheter it's a fraction or exponent.
 func (s *Scanner) scanMantissa(ch rune) rune {
 	scanned := false

vendor/vendor.json

@@ -255,15 +255,16 @@
 		{"path":"github.com/hashicorp/go-version","checksumSHA1":"+wX9Wh8280cHZMckQlOit3UrwbA=","revision":"2046c9d0f0b03c779670f5186a2a4b2c85493a71","revisionTime":"2019-10-09T19:36:37Z"},
 		{"path":"github.com/hashicorp/golang-lru","checksumSHA1":"d9PxF1XQGLMJZRct2R8qVM/eYlE=","revision":"a0d98a5f288019575c6d1f4bb1573fef2d1fcdc4","revisionTime":"2016-02-07T21:47:19Z"},
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