Re: Warn when editing read-only files

[Antonio Diaz Diaz]

Dan Jacobson wrote:
> > > > > > "PJ" == Paul Jackson<pj@usa.net>  writes:
> PJ>  might have intended only to read a file, not write it
>
> OK, no warning then upon opening a read only file. Fine.
>
> But ah ha, how about a warning upon using a "a" or "i" etc. command?

The other editor I maintain (GNU moe) does exactly this; if you try to 
modify a read-only file it complains with "Read only". So this should be 
doable in GNU ed as soon as we find a way to reset the 'read_only' flag. 
Maybe by changing the name of the file with 'f'?

Suggestions are welcome.

Antonio.