What does it log to console? What node.js version are you using? On Mon, Dec 9, 2013 at 2:17 PM, Felipe Silveira <[email protected]> wrote: > Thank bro to help, > > I change to this code and get the same error: > > var fs = require('fs'); > var fName = 'text.txt'; > fNameStat = fs.statSync(fName); > fs.watch(fName, function (evento, arquivo) { > fNameStatChanged = fs.statSync(arquivo); > console.log('file changed from ' + fNameStat.size + ' to ' + > fNameStatChanged.size); > fs.open(fName, 'r', function(err, fd) { > var newDataLength = fNameStatChanged.size - fNameStat.size; > console.log(newDataLength); > var buffer = new Buffer(newDataLength); > console.log(buffer); > console.log(fd); > if(newDataLength < 0 ){ > newDataLength = 0; > } > fs.read(fd, buffer, 0, newDataLength, null, function (err, > bytesRead, newData) { > if (err) { > console.log(err); > }; > console.log(newData.toString()); > > }); > fNameStat = fs.statSync(fName); > }); > > }); > > > On Monday, December 9, 2013 8:00:56 AM UTC-2, Fedor Indutny wrote: >> >> Hello! >> >> Perhaps, you are trying to create a Buffer of negative length? >> >> Also, I believe, that you do not need to pass encoding argument to the >> Buffer's constructor if you're creating just a fixed-size buffer. >> >> On Mon, Dec 9, 2013 at 1:58 PM, Felipe Silveira <[email protected]> >> wrote: >> > Hi There, >> > >> > I'm trying to tail a file in nodejs, the code is this: >> > >> > var fs = require('fs'); >> > var fName = 'file.txt'; >> > fNameStat = fs.statSync(fName); >> > fs.watch(fName, function (evento, arquivo) { >> > fNameStatChanged = fs.statSync(arquivo); >> > console.log('file changed from ' + fNameStat.size + ' to ' + >> > fNameStatChanged.size); >> > fs.open(fName, 'r', function(err, fd) { >> > var newDataLength = fNameStatChanged.size - fNameStat.size; >> > console.log(newDataLength); >> > var buffer = new Buffer(newDataLength, 'utf-8'); >> > console.log(buffer); >> > console.log(fd); >> > fs.read(fd, buffer, 0, newDataLength, null, function (err, >> > bytesRead, newData) { >> > if (err) { >> > console.log(err); >> > }; >> > console.log(newData.toString()); >> > >> > }); >> > fNameStat = fs.statSync(fName); >> > }); >> > >> > }); >> > >> > >> > I'm getting this error: >> > >> > fs.js:267 >> > binding.read(fd, buffer, offset, length, position, wrapper); >> > ^ >> > Error: Offset is out of bounds >> > at Object.read (fs.js:267:11) >> > at Object.oncomplete (/var/www/read/test.js:13:15) >> > >> > Anyone know whats happened? >> > >> > Regards, >> > >> > Felipe Silveira Mendes >> > Site - Twitter - Blog >> > Web Developer >> > (31) 8370-9090 (Claro) >> > (31) 9433-9310 (Tim) >> > [email protected] >> > >> > >> > -- >> > -- >> > Job Board: http://jobs.nodejs.org/ >> > Posting guidelines: >> > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines >> > You received this message because you are subscribed to the Google >> > Groups "nodejs" group. >> > To post to this group, send email to [email protected] >> > To unsubscribe from this group, send email to >> > [email protected] >> > For more options, visit this group at >> > http://groups.google.com/group/nodejs?hl=en?hl=en >> > >> > --- >> > You received this message because you are subscribed to the Google >> > Groups >> > "nodejs" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> > an >> > email to [email protected]. >> > For more options, visit https://groups.google.com/groups/opt_out.
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