Re: suggestion to avoid erroneous lines in findmnt/lslocks/...

[Karel Zak <kzak@redhat.com>]

On Wed, Aug 08, 2012 at 12:36:05AM +0100, Pádraig Brady wrote:
> ck\slash is not \x<xdigit> sequence, so escape is unnecessary
> > 
> >  Note that \\server\path is pretty common for cifs and use \x5c
> >  for all '\' will make the findmnt output unreadable in many cases.
> >  IMHO is better to be "smart" and use escape sequences only when it's
> >  really necessary.
> 
> Better for humans, but awkward for scripts to parse.
> What I was thinking was perhaps --raw or -P would
> do unconditional escaping of '\' so unescaping can be
> done with just `printf %b`?

 Good point. Fixed, all '\' will be replaced with \x5c.

> With the conditional escaping you'd have to do something like:
> 
> unmangle() {
>   printf '%b' $(
>     sed '
>       s/\\\([^x]\)/\\x5c\1/g;
>       s/\\\(x[^0-9a-f]\)/\\x5c\1/g;
>       s/\\\(x[0-9a-f][^0-9a-f]\)/\\x5c\1/g;
>     '
>   )
> }

 ugly, I see, let's use printf '%b' without the sed stuff. Thanks.

    Karel

-- 
 Karel Zak  <kzak@redhat.com>
 http://karelzak.blogspot.com