[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-bash] Readig multiple null-separated values

From: František Kučera
Subject: Re: [Help-bash] Readig multiple null-separated values
Date: Thu, 1 Aug 2019 15:54:46 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

Dne 29. 07. 19 v 10:01 David napsal(a):
On Sat, 27 Jul 2019 at 23:56, František Kučera <address@hidden> wrote:
in my Bash pipelines I sometimes pass data separated by null byte \0 and
it is not only lists (like in find -print0) but
matrices/tables/relations with fixed number of columns/attributes. The
\0 is used to both separate values and records. The advantage is that
the only forbidden character in values is the \0 and there are no
collisions with text separators like ,;:\t\n etc. and no need for
escaping or quoting. So it is a safe and simple way to pass structured
data between processes.
When you use the word "data" above, do you mean ASCII text,
or something else?

It is usually UTF-8 text and it could come from various sources like databases, XML, filesystem (file names, extended attributes or file content).

If ASCII text, are you aware of the ASCII delimiter characters?

I know about them, but as already mentioned by others, such characters might occur inside the value. And the only character that could not occur in a filename or C string is \0. However it is a corner-case and ASCII delimiters would mostly work.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]