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package term
// #include<stropts.h>
import "C"
import (
"os"
"syscall"
"unsafe"
"github.com/pkg/term/termios"
"golang.org/x/sys/unix"
)
type attr unix.Termios
func (a *attr) getSpeed() (int, error) {
// We generally only care about ospeed, since that's what would
// be used for padding characters, for example.
rate := termios.Cfgetospeed((*syscall.Termios)(a))
switch rate {
case syscall.B50:
return 50, nil
case syscall.B75:
return 75, nil
case syscall.B110:
return 110, nil
case syscall.B134:
return 134, nil
case syscall.B150:
return 150, nil
case syscall.B200:
return 200, nil
case syscall.B300:
return 300, nil
case syscall.B600:
return 600, nil
case syscall.B1200:
return 1200, nil
case syscall.B1800:
return 1800, nil
case syscall.B2400:
return 2400, nil
case syscall.B4800:
return 4800, nil
case syscall.B9600:
return 9600, nil
case syscall.B19200:
return 19200, nil
case syscall.B38400:
return 38400, nil
case syscall.B57600:
return 57600, nil
case syscall.B115200:
return 115200, nil
case syscall.B230400:
return 230400, nil
case syscall.B460800:
return 460800, nil
case syscall.B500000:
return 500000, nil
case syscall.B576000:
return 576000, nil
case syscall.B921600:
return 921600, nil
default:
return 0, syscall.EINVAL
}
}
func (a *attr) setSpeed(baud int) error {
var rate uint32
switch baud {
case 50:
rate = unix.B50
case 75:
rate = unix.B75
case 110:
rate = unix.B110
case 134:
rate = unix.B134
case 150:
rate = unix.B150
case 200:
rate = unix.B200
case 300:
rate = unix.B300
case 600:
rate = unix.B600
case 1200:
rate = unix.B1200
case 1800:
rate = unix.B1800
case 2400:
rate = unix.B2400
case 4800:
rate = unix.B4800
case 9600:
rate = unix.B9600
case 19200:
rate = unix.B19200
case 38400:
rate = unix.B38400
case 57600:
rate = unix.B57600
case 115200:
rate = unix.B115200
case 230400:
rate = unix.B230400
case 460800:
rate = unix.B460800
case 921600:
rate = unix.B921600
default:
return unix.EINVAL
}
err := termios.Cfsetispeed((*unix.Termios)(a), uintptr(rate))
if err != nil {
return err
}
err = termios.Cfsetospeed((*unix.Termios)(a), uintptr(rate))
if err != nil {
return err
}
return nil
}
// Open opens an asynchronous communications port.
func Open(name string, options ...func(*Term) error) (*Term, error) {
fd, e := unix.Open(name, unix.O_NOCTTY|unix.O_CLOEXEC|unix.O_NDELAY|unix.O_RDWR, 0666)
if e != nil {
return nil, &os.PathError{"open", name, e}
}
modules := [2]string{"ptem", "ldterm"}
for _, mod := range modules {
err := unix.IoctlSetInt(fd, C.I_PUSH, int(uintptr(unsafe.Pointer(unix.StringBytePtr(mod)))))
if err != nil {
return nil, err
}
}
t := Term{name: name, fd: fd}
termios.Tcgetattr(uintptr(t.fd), &t.orig)
if err := termios.Tcgetattr(uintptr(t.fd), &t.orig); err != nil {
return nil, err
}
if err := t.SetOption(options...); err != nil {
return nil, err
}
return &t, unix.SetNonblock(t.fd, false)
}
// Restore restores the state of the terminal captured at the point that
// the terminal was originally opened.
func (t *Term) Restore() error {
return termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, &t.orig)
}
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