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term: split out POSIX specific parts
Updates #8 Move POSIX specific parts into their own files. This probably still won't compile cleanly on windows, and of course, windows remains unsupported.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| // +build !windows | ||
|
|
||
| package term | ||
|
|
||
| import ( | ||
| "os" | ||
| "syscall" | ||
|
|
||
| "github.com/pkg/term/termios" | ||
| ) | ||
|
|
||
| // Term represents an asynchronous communications port. | ||
| type Term struct { | ||
| name string | ||
| fd int | ||
| orig syscall.Termios // original state of the terminal, see Open and Restore | ||
| } | ||
|
|
||
| // Open opens an asynchronous communications port. | ||
| func Open(name string, options ...func(*Term) error) (*Term, error) { | ||
| fd, e := syscall.Open(name, syscall.O_NOCTTY|syscall.O_CLOEXEC|syscall.O_RDWR, 0666) | ||
| if e != nil { | ||
| return nil, &os.PathError{"open", name, e} | ||
| } | ||
| t := Term{name: name, fd: fd} | ||
| if err := termios.Tcgetattr(uintptr(t.fd), &t.orig); err != nil { | ||
| return nil, err | ||
| } | ||
| return &t, t.SetOption(options...) | ||
| } | ||
|
|
||
| // SetCbreak sets cbreak mode. | ||
| func (t *Term) SetCbreak() error { | ||
| return t.SetOption(CBreakMode) | ||
| } | ||
|
|
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| // CBreakMode places the terminal into cbreak mode. | ||
| func CBreakMode(t *Term) error { | ||
| var a attr | ||
| if err := termios.Tcgetattr(uintptr(t.fd), (*syscall.Termios)(&a)); err != nil { | ||
| return err | ||
| } | ||
| termios.Cfmakecbreak((*syscall.Termios)(&a)) | ||
| return termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, (*syscall.Termios)(&a)) | ||
| } | ||
|
|
||
| // SetRaw sets raw mode. | ||
| func (t *Term) SetRaw() error { | ||
| return t.SetOption(RawMode) | ||
| } | ||
|
|
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| // RawMode places the terminal into raw mode. | ||
| func RawMode(t *Term) error { | ||
| var a attr | ||
| if err := termios.Tcgetattr(uintptr(t.fd), (*syscall.Termios)(&a)); err != nil { | ||
| return err | ||
| } | ||
| termios.Cfmakeraw((*syscall.Termios)(&a)) | ||
| return termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, (*syscall.Termios)(&a)) | ||
| } | ||
|
|
||
| // Speed sets the baud rate option for the terminal. | ||
| func Speed(baud int) func(*Term) error { | ||
| return func(t *Term) error { | ||
| return t.setSpeed(baud) | ||
| } | ||
| } | ||
|
|
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| // SetSpeed sets the receive and transmit baud rates. | ||
| func (t *Term) SetSpeed(baud int) error { | ||
| return t.SetOption(Speed(baud)) | ||
| } | ||
|
|
||
| func (t *Term) setSpeed(baud int) error { | ||
| var a attr | ||
| if err := termios.Tcgetattr(uintptr(t.fd), (*syscall.Termios)(&a)); err != nil { | ||
| return err | ||
| } | ||
| a.setSpeed(baud) | ||
| return termios.Tcsetattr(uintptr(t.fd), termios.TCSANOW, (*syscall.Termios)(&a)) | ||
| } | ||
|
|
||
| // Flush flushes both data received but not read, and data written but not transmitted. | ||
| func (t *Term) Flush() error { | ||
| return termios.Tcflush(uintptr(t.fd), termios.TCIOFLUSH) | ||
| } | ||
|
|
||
| // SendBreak sends a break signal. | ||
| func (t *Term) SendBreak() error { | ||
| return termios.Tcsendbreak(uintptr(t.fd), 0) | ||
| } | ||
|
|
||
| // SetDTR sets the DTR (data terminal ready) signal. | ||
| func (t *Term) SetDTR(v bool) error { | ||
| bits := syscall.TIOCM_DTR | ||
| if v { | ||
| return termios.Tiocmbis(uintptr(t.fd), &bits) | ||
| } else { | ||
| return termios.Tiocmbic(uintptr(t.fd), &bits) | ||
| } | ||
| } | ||
|
|
||
| // DTR returns the state of the DTR (data terminal ready) signal. | ||
| func (t *Term) DTR() (bool, error) { | ||
| var status int | ||
| err := termios.Tiocmget(uintptr(t.fd), &status) | ||
| return status&syscall.TIOCM_DTR == syscall.TIOCM_DTR, err | ||
| } | ||
|
|
||
| // SetRTS sets the RTS (data terminal ready) signal. | ||
| func (t *Term) SetRTS(v bool) error { | ||
| bits := syscall.TIOCM_RTS | ||
| if v { | ||
| return termios.Tiocmbis(uintptr(t.fd), &bits) | ||
| } else { | ||
| return termios.Tiocmbic(uintptr(t.fd), &bits) | ||
| } | ||
| } | ||
|
|
||
| // RTS returns the state of the RTS (data terminal ready) signal. | ||
| func (t *Term) RTS() (bool, error) { | ||
| var status int | ||
| err := termios.Tiocmget(uintptr(t.fd), &status) | ||
| return status&syscall.TIOCM_RTS == syscall.TIOCM_RTS, err | ||
| } | ||
|
|
||
| // 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.TCIOFLUSH, &t.orig) | ||
| } | ||
|
|
||
| // Close closes the device and releases any associated resources. | ||
| func (t *Term) Close() error { | ||
| err := syscall.Close(t.fd) | ||
| t.fd = -1 | ||
| return err | ||
| } |
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