// commandHandler responds to client message events that issue commands.
func commandHandler(X *xgbutil.XUtil, cm xevent.ClientMessageEvent) {
typeName, err := xprop.AtomName(X, cm.Type)
if err != nil {
logger.Warning.Printf(
"Could not get type of ClientMessage event: %s", cm)
return
}
if typeName == "_WINGO_CMD" {
cmd, err := cmdusage.CmdGet(X)
if err != nil {
logger.Warning.Printf("Could not get _WINGO_CMD value: %s", err)
return
}
// Blank out the command
cmdusage.CmdSet(X, "")
// Parse the command
cmdName, args := commandParse(cmd)
cmdFun := commandFun("", cmdName, args...)
if cmdFun != nil {
cmdFun()
cmdusage.StatusSet(X, true)
} else {
cmdusage.StatusSet(X, false)
}
}
}
func main() {
X, err := xgbutil.Dial("")
if err != nil {
logger.Error.Println(err)
logger.Error.Println("Error connecting to X, quitting...")
return
}
defer X.Conn().Close()
// Get command from arguments
flag.Parse()
if flag.NArg() < 1 {
fmt.Fprintln(os.Stderr, "Usage: wingo-cmd CommandName [CommandArgs]")
return
}
commandPieces := flag.Args()
cmdName := commandPieces[0]
cmdFull := strings.Join(commandPieces, " ")
// make sure we start with failure
cmdusage.StatusSet(X, false)
success := false
// Set the command before sending request to run command.
err = cmdusage.CmdSet(X, cmdFull)
if err != nil {
logger.Error.Printf("Could not set command: %s", err)
return
}
// Issue the command!
ewmh.ClientEvent(X, X.RootWin(), "_WINGO_CMD")
// Now let's set up a handler to detect when the status changes
xevent.PropertyNotifyFun(
func(X *xgbutil.XUtil, ev xevent.PropertyNotifyEvent) {
name, err := xprop.AtomName(X, ev.Atom)
if err != nil {
logger.Warning.Println(
"Could not get property atom name for", ev.Atom)
return
}
if name == "_WINGO_CMD_STATUS" {
success = cmdusage.StatusGet(X)
if success {
os.Exit(0)
} else {
logger.Warning.Printf("Error running '%s'", cmdFull)
cmdusage.ShowUsage(cmdName)
os.Exit(1)
}
}
}).Connect(X, X.RootWin())
// Listen to Root property change events
xwindow.Listen(X, X.RootWin(), xproto.EventMaskPropertyChange)
go xevent.Main(X)
time.Sleep(time.Second * 5)
logger.Error.Println(
"Timed out while trying to issue command to Wingo. " +
"Are you sure Wingo is running?")
os.Exit(1)
}