How to Find the File Position with Seek() in Go?

Finding File Position with Seek() in Go

In Go, there is no direct equivalent to the fgetpos function from C's stdio.h. However, you can determine the current file offset or position by using the Seek method.

To find the position of the file pointer, you can perform a Seek operation for 0 bytes from the current position. This returns the resulting file offset, which is expected to be the absolute position of the file pointer.

Here's how you can achieve this:

offset, err := f.Seek(0, io.SeekCurrent)
if err != nil {
    // Handle error
}
fmt.Printf("Current file offset: %d\n", offset)

In this example, f is the *os.File instance for which you want to retrieve the file position. The Seek method takes two arguments: the offset (0 in this case) and a SeekMode value, which specifies relative to which position the offset is applied. io.SeekCurrent indicates that the offset should be applied relative to the current position.

Once you have the file position stored in the offset variable, you can use it to perform various operations, such as seeking to a specific position within the file.

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