mirror of
https://shylinux.com/x/icebergs
synced 2025-04-25 17:18:05 +08:00
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
//go:build darwin
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// +build darwin
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package xterm
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import (
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"errors"
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"os"
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"syscall"
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"unsafe"
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kit "shylinux.com/x/toolkits"
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)
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func open() (pty, tty *os.File, err error) {
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pFD, err := syscall.Open("/dev/ptmx", syscall.O_RDWR|syscall.O_CLOEXEC, 0)
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if err != nil {
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return nil, nil, err
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}
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p := os.NewFile(uintptr(pFD), "/dev/ptmx")
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defer func() { kit.If(err != nil, func() { _ = p.Close() }) }()
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sname, err := ptsname(p)
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if err != nil {
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return nil, nil, err
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}
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if err := grantpt(p); err != nil {
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return nil, nil, err
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}
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if err := unlockpt(p); err != nil {
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return nil, nil, err
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}
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t, err := os.OpenFile(sname, os.O_RDWR|syscall.O_NOCTTY, 0)
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if err != nil {
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return nil, nil, err
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}
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return p, t, nil
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}
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func ptsname(f *os.File) (string, error) {
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n := make([]byte, _IOC_PARM_LEN(syscall.TIOCPTYGNAME))
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err := ioctl(f.Fd(), syscall.TIOCPTYGNAME, uintptr(unsafe.Pointer(&n[0])))
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if err != nil {
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return "", err
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}
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for i, c := range n {
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if c == 0 {
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return string(n[:i]), nil
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}
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}
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return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
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}
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func grantpt(f *os.File) error { return ioctl(f.Fd(), syscall.TIOCPTYGRANT, 0) }
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func unlockpt(f *os.File) error { return ioctl(f.Fd(), syscall.TIOCPTYUNLK, 0) }
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const (
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_IOC_VOID uintptr = 0x20000000
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_IOC_OUT uintptr = 0x40000000
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_IOC_IN uintptr = 0x80000000
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_IOC_IN_OUT uintptr = _IOC_OUT | _IOC_IN
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_IOC_DIRMASK = _IOC_VOID | _IOC_OUT | _IOC_IN
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_IOC_PARAM_SHIFT = 13
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_IOC_PARAM_MASK = (1 << _IOC_PARAM_SHIFT) - 1
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)
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func _IOC_PARM_LEN(ioctl uintptr) uintptr { return (ioctl >> 16) & _IOC_PARAM_MASK }
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