On 09/23/2017 12:34 PM, Brandon Allbery wrote:
On Sat, Sep 23, 2017 at 2:34 AM, ToddAndMargo <toddandma...@zoho.com
<mailto:toddandma...@zoho.com>> wrote:
I see ":truncate". This seems liek it will do the trick.
Problem: I would like to read from the file first before
truncating (ro).
Is there a way to do this, or should I
1) open the handle with :ro
2) read what I want from it
3) close the handle
4) reopen the handle with :w and overwrite what I want?
You have to do it the long way. I don't think we expose a binding to
ftruncate() that would let you open it r/.w, red from it, truncate, and
write.
That said, there's actually a good reason for that: is it okay to trash
the file if something goes wrong? You might prefer to *rename* the old
file instead of overwriting, so you can recover if necessary.
That is what I did. Thank you for the confirmation!
