Contains the implementation of linux's yes command.

yes.js

#!/usr/bin/env node

/*

    This small node.js app should do exactly what the yes linux command does.
    
    Quote from man yes:
        Repeatedly output a line with all specified STRING(s), or `y'.

*/

var DEFAULT_TEXT = "y\n";
var CUSTOM_TEXT = "";

var printUsage = function() {
    process.stdout.write("this will contain the details how to use the program\n");
};

var writeDefaultText = function() {
    process.stdout.write(DEFAULT_TEXT);
};

var writerCustomText = function() {
      process.stdout.write(CUSTOM_TEXT);
};

//handler for CTRL + C
process.on("SIGINT", function() {
    clearInterval(writeDefaultText);
    clearInterval(writerCustomText);
    process.exit(0);
});


if(process.argv.length == 2) {
    setInterval(writeDefaultText, 2);
}
else if(process.argv.length == 3) {

    CUSTOM_TEXT = process.argv[2];
    if(CUSTOM_TEXT[CUSTOM_TEXT.length - 1] != "\n") {
        CUSTOM_TEXT += "\n";
    }
    setInterval(writerCustomText, 2);
}
else {
    printUsage();
}