Re: read string containing null

[Pier Paolo Grassi <pierpaolog@xxxxxxxxx>]

Yes, I want to read the whole stdin in a single operation, so the -d was there to disable stopping at newline

It seem that instead made read stop at null bytes

I worked around this limitation with:

xx=$(echo -e - a$'\000'b; echo .); xx=${xx[1,-2]}; echo -n - $xx

ab

but I will try also your suggestion, thanks

Pier Paolo Grassi

Il giorno gio 21 ott 2021 alle ore 15:08 Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx> ha scritto:

> On 21 October 2021 at 13:35 Pier Paolo Grassi <pierpaolog@xxxxxxxxx> wrote:
> Hello, I just found out:
>
> echo -e - a$'\000'b | IFS='' builtin read -r -d '' xx; echo -n - $xx
> result is "a"
>
> is it possible for builtin read not to stop an null bytes? I found nothing
> in documentation.
> thanks

I think -d '' is telling it to treat NULL bytes as a delimiter.  Take that out.

If you're not trying to read a line, don't use read.  If you "zmodload zsh/system"
there's a sysread command which is more useful for lower level operations.

pws