forked from x/icebergs
48 lines
922 B
Go
48 lines
922 B
Go
//go:build linux
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// +build linux
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package xterm
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import (
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"os"
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"strconv"
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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() (*os.File, *os.File, error) {
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p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
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if err != nil {
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return nil, nil, err
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}
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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 := 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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var n uint32
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err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n)))
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if err != nil {
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return "", err
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}
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return "/dev/pts/" + strconv.Itoa(int(n)), nil
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}
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func unlockpt(f *os.File) error {
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var u int32
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return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
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}
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