Tail from end of file about tail HOT 7 CLOSED

Figured this out by myself. Just had to specify a SeekInfo in the tail config object:

tail, err := tail.TailFile("testFile.txt", tail.Config{
    Location: &tail.SeekInfo{
        Whence: io.SeekEnd,
    },
    // Rest of config
})

from tail.

Thank you for responding, I have tried the same, but every time I save the file with a new line, I receive all lines from start. Instead, I want only new lines

Just gonna report my experience here because I thought I was facing the same issue as you, and it turns out that's not the case.

The library works as expected, and does not resend every line from the start if you append new lines correctly. By this I mean that you actually append new lines. What some editors do is that, when you write a new line to the end of a file and save it, the editor then opens the file in write mode and rewrites all contents to it, instead of just appending to the end. This makes tail see the file changed as a whole and so it resends all lines from the start.

If you actually use an append mode to write to the file, you will see it behave exactly as you want it to. One way to test this is to append with echo, like so echo "line content" >> /path/to/file (notice the use of >> there, not >)

from tail.

Than you for the digging (and excuses for my late reaction). Do you see a place where we could inprove the documentation? I am trying to cleanup and test the noTomb branch where the API and doc should be improved (https://github.com/nxadm/tail/tree/noTomb).

from tail.

No worries! Looking further into it, this is a gripe I have with Go's io package, where the Seek function lives. They use the word 'whence,' which is absolutely meaningless, but it is well-commented. So, short of having a Github wiki page or something, I'm not really sure there's actually anything you can do here. :/

from tail.

Hi Team,

This library by default returns every line again from the start if follow is enabled. how to receive only new lines? I am trying to understand but could not figure it out. Can you help me

from tail.

When I used this, I seeked to the end:

w.tail, tailErr = tail.TailFile(path, tail.Config{
    Location: &tail.SeekInfo{
        Whence: io.SeekEnd,
    },
    ReOpen: true,
    Follow: true,
})

I don't know how valid this is still, since it's been years.

from tail.

Thank you for responding,
I have tried the same, but every time I save the file with a new line, I receive all lines from start. Instead, I want only new lines

from tail.