forked from x/icebergs
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
//go:build darwin
|
|
// +build darwin
|
|
|
|
package xterm
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"syscall"
|
|
"unsafe"
|
|
|
|
kit "shylinux.com/x/toolkits"
|
|
)
|
|
|
|
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")
|
|
defer func() { kit.If(err != nil, func() { _ = p.Close() }) }()
|
|
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|syscall.O_NOCTTY, 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) }
|
|
|
|
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 }
|