Created
February 22, 2024 01:58
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Pass VT to Bubbletea
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// Incomplete code, leaves out the imports and Bubbletea model and setup | |
func nextFreeConsole() (int, error) { | |
f, err := os.OpenFile("/dev/tty0", os.O_WRONLY, 0) | |
if err != nil { | |
return 0, err | |
} | |
defer f.Close() | |
free, err := unix.IoctlGetInt(int(f.Fd()), linuxvt.VT_OPENQRY) | |
if err != nil { | |
return 0, fmt.Errorf("VT_OPENQRY: %v", err) | |
} | |
if err := f.Close(); err != nil { | |
return 0, err | |
} | |
return free, nil | |
} | |
func main() { | |
free, err := nextFreeConsole() | |
if err != nil { | |
log.Print(err) | |
} | |
log.Printf("opening next free console /dev/tty%d", free) | |
f, err := os.OpenFile(fmt.Sprintf("/dev/tty%d", free), os.O_RDWR, 0) | |
if err != nil { | |
log.Print(err) | |
} | |
var state linuxvt.VTState | |
_, _, eno := unix.Syscall(unix.SYS_IOCTL, f.Fd(), linuxvt.VT_GETSTATE, uintptr(unsafe.Pointer(&state))) | |
if eno != 0 { | |
log.Printf("VT_GETSTATE: %v", eno) | |
} | |
if err := unix.IoctlSetInt(int(f.Fd()), linuxvt.VT_ACTIVATE, free); err != nil { | |
log.Printf("VT_ACTIVATE: %v", err) | |
} | |
if err := unix.IoctlSetInt(int(f.Fd()), linuxvt.VT_WAITACTIVE, free); err != nil { | |
log.Printf("VT_WAITACTIVE: %v", err) | |
} | |
// Here you see me actually passing the TTY into tea. | |
if _, err := tea.NewProgram(model{}, tea.WithInput(f), tea.WithOutput(f)).Run(); err != nil { | |
log.Printf("Error running program: %v", err) | |
os.Exit(1) | |
} | |
} |
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