Like This?
var fs = require('fs');
var fName = 'test.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 ){
fs.read(fd, buffer, 0, newDataLength, null, function (err,
bytesRead, newData) {
if (err) {
console.log(err);
};
console.log(newData.toString());
});
}
fNameStat = fs.statSync(fName);
});
});
*Att,*
*Felipe Silveira Mendes*Site <http://felipems.com.br> -
Twitter<https://twitter.com/felipesmendes>-
Blog <http://felipems.com.br/blog>
*Web Developer*
*(31) 8370-9090 (Claro)*
*(31) 9433-9310 (Tim)*
*[email protected] <[email protected]>*
2013/12/9 Fedor Indutny <[email protected]>
> You should not read if len === 0.
>
> On Mon, Dec 9, 2013 at 7:02 PM, Felipe Silveira <[email protected]>
> wrote:
> > Sorry, I didn't understand, what I need to do on the code?
> >
> > Att,
> > Felipe Silveira Mendes
> > Site - Twitter - Blog
> > Web Developer
> > (31) 8370-9090 (Claro)
> > (31) 9433-9310 (Tim)
> > [email protected]
> >
> >
> >
> >
> > 2013/12/9 Fedor Indutny <[email protected]>
> >>
> >> Ok, so you create 0 length buffer here, and doing 0-size read :)
> >>
> >> That's totally not supported.
> >>
> >> On Mon, Dec 9, 2013 at 6:57 PM, Felipe Silveira <
> [email protected]>
> >> wrote:
> >> > Ooh Sorry yeah I forgot, here is:
> >> >
> >> > file changed from 101644 to 101650
> >> > file changed from 101644 to 101650
> >> > file changed from 101644 to 101650
> >> > 6
> >> > <Buffer 8c e0 0f 09 ac ad>
> >> > 11
> >> > 0
> >> > <Buffer >
> >> > 12
> >> >
> >> >
> >> > Att,
> >> > Felipe Silveira Mendes
> >> > Site - Twitter - Blog
> >> > Web Developer
> >> > (31) 8370-9090 (Claro)
> >> > (31) 9433-9310 (Tim)
> >> > [email protected]
> >> >
> >> >
> >> >
> >> >
> >> > 2013/12/9 Fedor Indutny <[email protected]>
> >> >>
> >> >> So, don't tell me it isn't printing anything else :) You have a lot
> of
> >> >> console.log()s there. Can you paste them here?
> >> >>
> >> >> On Mon, Dec 9, 2013 at 6:46 PM, Felipe Silveira
> >> >> <[email protected]>
> >> >> wrote:
> >> >> > I updated my node js to version v0.10.22 and installed nodejs-dbg
> for
> >> >> > debug
> >> >> > and getting the same error:
> >> >> >
> >> >> > fs.js:457
> >> >> > binding.read(fd, buffer, offset, length, position, wrapper);
> >> >> > ^
> >> >> > Error: Offset is out of bounds
> >> >> > at Object.fs.read (fs.js:457:11)
> >> >> > at /var/www/read/test.js:16:15
> >> >> > at Object.oncomplete (fs.js:107:15)
> >> >> >
> >> >> >
> >> >> > The code of script:
> >> >> >
> >> >> > var fs = require('fs');
> >> >> > var fName = 'test.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);
> >> >> > });
> >> >> >
> >> >> > });
> >> >> >
> >> >> >
> >> >> > Att,
> >> >> > Felipe Silveira Mendes
> >> >> > Site - Twitter - Blog
> >> >> > Web Developer
> >> >> > (31) 8370-9090 (Claro)
> >> >> > (31) 9433-9310 (Tim)
> >> >> > [email protected]
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > 2013/12/9 Fedor Indutny <[email protected]>
> >> >> >>
> >> >> >> Depends on what ppa are you using. I'd recommend trying:
> >> >> >> https://launchpad.net/~chris-lea/+archive/node.js/
> >> >> >>
> >> >> >> On Mon, Dec 9, 2013 at 2:37 PM, Felipe Silveira
> >> >> >> <[email protected]>
> >> >> >> wrote:
> >> >> >> > Ok, How can I upgrade my node?
> >> >> >> > I'm using ubuntu 10.10 and can I do it with apt-get or aptitude?
> >> >> >> > What comands I need to do?
> >> >> >> >
> >> >> >> > Att,
> >> >> >> > Felipe Silveira Mendes
> >> >> >> > Site - Twitter - Blog
> >> >> >> > Web Developer
> >> >> >> > (31) 8370-9090 (Claro)
> >> >> >> > (31) 9433-9310 (Tim)
> >> >> >> > [email protected]
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> > 2013/12/9 Fedor Indutny <[email protected]>
> >> >> >> >>
> >> >> >> >> Hm... this version is really really old, may I ask you to try
> >> >> >> >> upgrading to at least v0.6.21 ? (Would be much better to give a
> >> >> >> >> try
> >> >> >> >> to
> >> >> >> >> latest 0.10, or 0.8).
> >> >> >> >>
> >> >> >> >> On Mon, Dec 9, 2013 at 2:29 PM, Felipe Silveira
> >> >> >> >> <[email protected]>
> >> >> >> >> wrote:
> >> >> >> >> > Yes yes, i'm loggin just what I got on the console...the node
> >> >> >> >> > version
> >> >> >> >> > is
> >> >> >> >> > v0.6.17
> >> >> >> >> >
> >> >> >> >> > Att,
> >> >> >> >> > Felipe Silveira Mendes
> >> >> >> >> > Site - Twitter - Blog
> >> >> >> >> > Web Developer
> >> >> >> >> > (31) 8370-9090 (Claro)
> >> >> >> >> > (31) 9433-9310 (Tim)
> >> >> >> >> > [email protected]
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> > 2013/12/9 Fedor Indutny <[email protected]>
> >> >> >> >> >>
> >> >> >> >> >> You're logging much more data than this, are you sure it
> >> >> >> >> >> prints
> >> >> >> >> >> out
> >> >> >> >> >> only the error? And also you forgot to include version
> number
> >> >> >> >> >> of
> >> >> >> >> >> node.js that you're using.
> >> >> >> >> >>
> >> >> >> >> >> On Mon, Dec 9, 2013 at 2:23 PM, Felipe Silveira
> >> >> >> >> >> <[email protected]>
> >> >> >> >> >> wrote:
> >> >> >> >> >> > Console
> >> >> >> >> >> >
> >> >> >> >> >> > 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/leitor/teste.js:16:15)
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> > Node Version v0.6.17
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> > Att,
> >> >> >> >> >> > Felipe Silveira Mendes
> >> >> >> >> >> > Site - Twitter - Blog
> >> >> >> >> >> > Web Developer
> >> >> >> >> >> > (31) 8370-9090 (Claro)
> >> >> >> >> >> > (31) 9433-9310 (Tim)
> >> >> >> >> >> > [email protected]
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >> > 2013/12/9 Fedor Indutny <[email protected]>
> >> >> >> >> >> >>
> >> >> >> >> >> >> 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
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> >> >> >> >> >> >> >> > Groups "nodejs" group.
> >> >> >> >> >> >> >> > To post to this group, send email to
> >> >> >> >> >> >> >> > [email protected]
> >> >> >> >> >> >> >> > To unsubscribe from this group, send email to
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> >> >> >> >> >> >> >> > 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
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> >> >> >> >> >> >
> >> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >
> >> >> >
> >> >
> >> >
> >
> >
>
--
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