// DisableFlags disables the terminal flags specified in the function
// argument 'flags', and returns the previous state of the terminal
// so that it can be restored.
func DisableFlags(fd FileDescriptor, flags Flag) (*State, error) {
var oldState State
if _, _, err := unix.Syscall6(unix.SYS_IOCTL, fd.Fd(), ioctlReadTermios, uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); err != 0 {
return nil, err
}
newState := oldState.termios
newState.Lflag &^= uint32(flags)
if _, _, err := unix.Syscall6(unix.SYS_IOCTL, fd.Fd(), ioctlWriteTermios, uintptr(unsafe.Pointer(&newState)), 0, 0, 0); err != 0 {
return nil, err
}
return &oldState, nil
}
func PtraceDetach(tid, sig int) error {
_, _, err := sys.Syscall6(sys.SYS_PTRACE, sys.PT_DETACH, uintptr(tid), 1, uintptr(sig), 0, 0)
if err != syscall.Errno(0) {
return err
}
return nil
}
func PtraceSingleStep(tid int) error {
_, _, err := sys.Syscall6(sys.SYS_PTRACE, sys.PT_STEP, uintptr(tid), 1, 0, 0, 0)
if err != syscall.Errno(0) {
return err
}
return nil
}
func PtraceCont(tid, sig int) error {
_, _, err := sys.Syscall6(sys.SYS_PTRACE, sys.PTRACE_CONT, uintptr(tid), 1, uintptr(sig), 0, 0)
if err != syscall.Errno(0) {
return err
}
return nil
}
func getxattr(path string, attr string, dest []byte) (sz int, err error) {
var _p0 *byte
_p0, err = unix.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = unix.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(dest) > 0 {
_p2 = unsafe.Pointer(&dest[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
r0, _, e1 := unix.Syscall6(unix.SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), 0, 0)
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
sz = int(r0)
if e1 != 0 {
err = syscall.Errno(e1)
}
return
}
// PtracePokeUser execute ptrace PTRACE_POKE_USER.
func PtracePokeUser(tid int, off, addr uintptr) error {
_, _, err := sys.Syscall6(sys.SYS_PTRACE, sys.PTRACE_POKEUSR, uintptr(tid), uintptr(off), uintptr(addr), 0, 0)
if err != syscall.Errno(0) {
return err
}
return nil
}
func setxattr(path string, attr string, data []byte, flags int) (err error) {
var _p0 *byte
_p0, err = unix.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = unix.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(data) > 0 {
_p2 = unsafe.Pointer(&data[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
_, _, e1 := unix.Syscall6(unix.SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
if e1 != 0 {
err = syscall.Errno(e1)
}
return
}
func Renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) {
oldPtr, err := unix.BytePtrFromString(oldpath)
if err != nil {
return
}
newPtr, err := unix.BytePtrFromString(newpath)
if err != nil {
return
}
_, _, errno := unix.Syscall6(
SYS_RENAMEAT2,
uintptr(olddirfd),
uintptr(unsafe.Pointer(oldPtr)),
uintptr(newdirfd),
uintptr(unsafe.Pointer(newPtr)),
uintptr(flags),
0,
)
use(unsafe.Pointer(oldPtr))
use(unsafe.Pointer(newPtr))
if errno != 0 {
// In the syscall module the authors box a couple of common errors
// (i.e EAGAIN, EINVAL, and ENOENT). Is that worth doing here?
err = errno
}
return
}
func getTTYWidth() int {
var fd uintptr
fh, err := os.Open("/dev/tty")
if err == nil {
fd = fh.Fd()
defer fh.Close()
} else {
fd = uintptr(unix.Stdin)
}
var dimensions [4]uint16
if _, _, err := unix.Syscall6(unix.SYS_IOCTL, fd, uintptr(unix.TIOCGWINSZ), uintptr(unsafe.Pointer(&dimensions)), 0, 0, 0); err != 0 {
return 0
}
return int(dimensions[1])
}
func listxattr(path string, dest []byte, flags int) (sz int, err error) {
var _p0 *byte
_p0, err = unix.BytePtrFromString(path)
if err != nil {
return
}
var _p1 unsafe.Pointer
if len(dest) > 0 {
_p1 = unsafe.Pointer(&dest[0])
} else {
_p1 = unsafe.Pointer(&_zero)
}
r0, _, e1 := unix.Syscall6(unix.SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
sz = int(r0)
if e1 != 0 {
err = syscall.Errno(e1)
}
return
}
// Restore restores the terminal connected to the given file descriptor to a
// previous state.
func Restore(fd FileDescriptor, state *State) error {
_, _, err := unix.Syscall6(unix.SYS_IOCTL, fd.Fd(), ioctlWriteTermios, uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0)
return err
}
// IsTerminal returns true if the given file descriptor is a terminal.
func IsTerminal(fd FileDescriptor) bool {
var termios unix.Termios
_, _, err := unix.Syscall6(unix.SYS_IOCTL, fd.Fd(), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
return err == 0
}
func ptrace(request, pid int, addr uintptr, data uintptr) (err error) {
_, _, err = sys.Syscall6(sys.SYS_PTRACE, uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
return
}