unix: add ioctl functions on NetBSD

Add IoctlGetInt/IoctlSetInt, IoctlGetTermios/IoctlSetTermios and
IoctlGetWinsize/IoctlSetWinsize on NetBSD. These are similar to the
already existing implementations on Linux, Darwin and Solaris.

Change-Id: I6c38d946b9f461c8e4c6c5e044aaff9b37e4b02f
Reviewed-on: https://go-review.googlesource.com/76171
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

unix/syscall_netbsd.go

@@ -129,6 +129,45 @@ func setattrlistTimes(path string, times []Timespec, flags int) error {
 	return ENOSYS
 }
 
+//sys	ioctl(fd int, req uint, arg uintptr) (err error)
+
+// ioctl itself should not be exposed directly, but additional get/set
+// functions for specific types are permissible.
+
+// IoctlSetInt performs an ioctl operation which sets an integer value
+// on fd, using the specified request number.
+func IoctlSetInt(fd int, req uint, value int) error {
+	return ioctl(fd, req, uintptr(value))
+}
+
+func IoctlSetWinsize(fd int, req uint, value *Winsize) error {
+	return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
+}
+
+func IoctlSetTermios(fd int, req uint, value *Termios) error {
+	return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
+}
+
+// IoctlGetInt performs an ioctl operation which gets an integer value
+// from fd, using the specified request number.
+func IoctlGetInt(fd int, req uint) (int, error) {
+	var value int
+	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	return value, err
+}
+
+func IoctlGetWinsize(fd int, req uint) (*Winsize, error) {
+	var value Winsize
+	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	return &value, err
+}
+
+func IoctlGetTermios(fd int, req uint) (*Termios, error) {
+	var value Termios
+	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	return &value, err
+}
+
 /*
  * Exposed directly
  */
@@ -389,7 +428,6 @@ func setattrlistTimes(path string, times []Timespec, flags int) error {
 // getitimer
 // getvfsstat
 // getxattr
-// ioctl
 // ktrace
 // lchflags
 // lchmod

unix/types_netbsd.go

@@ -228,6 +228,8 @@ type BpfTimeval C.struct_bpf_timeval
 
 type Termios C.struct_termios
 
+type Winsize C.struct_winsize
+
 // fchmodat-like syscalls.
 
 const (

unix/zsyscall_netbsd_386.go

@@ -406,6 +406,16 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ioctl(fd int, req uint, arg uintptr) (err error) {
+	_, _, e1 := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), uintptr(arg))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_netbsd_amd64.go

@@ -406,6 +406,16 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ioctl(fd int, req uint, arg uintptr) (err error) {
+	_, _, e1 := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), uintptr(arg))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_netbsd_arm.go

@@ -406,6 +406,16 @@ func getdents(fd int, buf []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func ioctl(fd int, req uint, arg uintptr) (err error) {
+	_, _, e1 := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), uintptr(arg))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/ztypes_netbsd_386.go

@@ -382,6 +382,13 @@ type Termios struct {
 	Ospeed int32
 }
 
+type Winsize struct {
+	Row    uint16
+	Col    uint16
+	Xpixel uint16
+	Ypixel uint16
+}
+
 const (
 	AT_FDCWD            = -0x64
 	AT_SYMLINK_NOFOLLOW = 0x200

unix/ztypes_netbsd_amd64.go

@@ -389,6 +389,13 @@ type Termios struct {
 	Ospeed int32
 }
 
+type Winsize struct {
+	Row    uint16
+	Col    uint16
+	Xpixel uint16
+	Ypixel uint16
+}
+
 const (
 	AT_FDCWD            = -0x64
 	AT_SYMLINK_NOFOLLOW = 0x200

unix/ztypes_netbsd_arm.go

@@ -387,6 +387,13 @@ type Termios struct {
 	Ospeed int32
 }
 
+type Winsize struct {
+	Row    uint16
+	Col    uint16
+	Xpixel uint16
+	Ypixel uint16
+}
+
 const (
 	AT_FDCWD            = -0x64
 	AT_SYMLINK_NOFOLLOW = 0x200