[Toybox] Embedded NUL bytes in grep/sed, or "strings are hard".

[Rob Landley]

On 09/30/14 09:27, Josiah Worcester wrote:
> On Tue, Sep 30, 2014 at 8:22 AM, Rob Landley <rob at landley.net
> <mailto:rob at landley.net>> wrote:
> 
>     The recent request to make grep work with embedded nul bytes (which
>     impacts
>     the design of sed and probably other stuff) is... tricky. Because line
>     buffering is a nightmare.
> 
>     The problem is that while posix-2008 getline() will read an entire
>     line to the
>     next newline, returning embedded NUL bytes if any, it _won't_ tell
>     you the
>     length of the line it read. It returns a length, but that's the
>     length of the
>     allocated buffer, which is rounded up to who knows what and the
>     extra data
>     not necessarily zeroed.
> 
> 
> Actually it will: though that pointer-to-size_t argument in there is
> just the allocated buffer size, its return value actually is the length
> of the line it read. Sure, the interface is a bit rough, but it's not
> *quite* as insane as you might think. :)

Oh good. I can work with that.

Thanks,

Rob

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