CODEWITHSUNDEEP
javascriptnode.js
ditoslav
ditoslav

Reputation: 4872

Why "bad argument" error in fs.write

Ok. So I'm trying to read a number from one file, which represents a counter, do some looping and each time write to a second file and then stop whenever I feel like and write the new value of the counter to the same first file.

var textPath = "/kolodvori.txt";
var countPath = "/dijestao.txt";
var buffer = new Buffer(0);

fs.readFile(countPath, function (err,data){
    if (err) console.log(err);
    else {      
        console.log(data);
        i = data;

        var stream2 = fs.createWriteStream(textPath, {flags: 'a'});

        stream2.once('open', function (fd){ 
            fs.open(countPath,'w', function (fd2){
                getPageHtml(defHost, firstNewPath, i, function (html,count,callback){

                    if (count%10==0) console.log(count);

                    ++count;
                    i = new Buffer(count.toString());

                    //console.log('i:' + i);
                    fs.write(fd2, i, 0, i.length, null, function (err,len,buff){ console.log(err); });

                    var newPath = defPath.replace(/xxxKOLO1xxx/gi, count);

                    getPageHtml(defHost, newPath, count, callback);
                });
            });
        });
    }
});

After all my hard work I'm rewarded with a 

fs.js:513
binding.write(fd, buffer, offset, length, position, wrapper);
        ^
TypeError: Bad argument
     at Object.fs.write (fs.js:513:11)

What does "bad argument" even mean in this context? Has it something to do with me having 2 ways of reading and then writing to the same file?

Upvotes: 1

Views: 3444

Answers (2)

Andreas Dyballa
Andreas Dyballa

Reputation: 179

I had the same error and ended up using writeFile.

https://nodejs.org/api/fs.html#fs_fs_writefile_filename_data_options_callback

Upvotes: 1

bevacqua
bevacqua

Reputation: 48476

Use path.join(__dirname, "./kolodvori.txt") and path.join(__dirname, "./dijestao.txt") instead.

Using / means relative to the root, and you want to be relative to your script's directory.

Remember to do var path = require("path"); at the top.

Upvotes: 2

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