/usr/share/gocode/src/github.com/lxc/lxd/shared/termios/termios.go is in golang-github-lxc-lxd-dev 2.0.2-0ubuntu1~16.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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package termios
import (
"syscall"
"unsafe"
"github.com/lxc/lxd/shared"
)
// #include <termios.h>
import "C"
type State struct {
Termios syscall.Termios
}
func IsTerminal(fd int) bool {
_, err := GetState(fd)
return err == nil
}
func GetState(fd int) (*State, error) {
termios := syscall.Termios{}
ret, err := C.tcgetattr(C.int(fd), (*C.struct_termios)(unsafe.Pointer(&termios)))
if ret != 0 {
return nil, err.(syscall.Errno)
}
state := State{}
state.Termios = termios
return &state, nil
}
func GetSize(fd int) (int, int, error) {
var dimensions [4]uint16
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&dimensions)), 0, 0, 0); err != 0 {
return -1, -1, err
}
return int(dimensions[1]), int(dimensions[0]), nil
}
func MakeRaw(fd int) (*State, error) {
var err error
var oldState, newState *State
oldState, err = GetState(fd)
if err != nil {
return nil, err
}
err = shared.DeepCopy(&oldState, &newState)
if err != nil {
return nil, err
}
C.cfmakeraw((*C.struct_termios)(unsafe.Pointer(&newState.Termios)))
err = Restore(fd, newState)
if err != nil {
return nil, err
}
return oldState, nil
}
func Restore(fd int, state *State) error {
ret, err := C.tcsetattr(C.int(fd), C.TCSANOW, (*C.struct_termios)(unsafe.Pointer(&state.Termios)))
if ret != 0 {
return err.(syscall.Errno)
}
return nil
}
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