From: Martijn Dekker <martijn@inlv.org>
To: dash@vger.kernel.org
Subject: [BUG] ${#var} returns length in bytes, not characters
Date: Wed, 03 Jun 2015 13:29:33 +0200 [thread overview]
Message-ID: <556EE51D.8080100@inlv.org> (raw)
POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02
> ${#parameter}
> String Length. The length in characters of the value of parameter
> shall be substituted. [...]
dash does not expand the length in characters; it expands the length in
bytes instead. That is invalid for locales that include multi-byte
characters, such as the now ubiquitous UTF-8 set.
Test case:
$ locale
LANG="nl_NL.UTF-8"
LC_COLLATE="nl_NL.UTF-8"
LC_CTYPE="nl_NL.UTF-8"
LC_MESSAGES="nl_NL.UTF-8"
LC_MONETARY="nl_NL.UTF-8"
LC_NUMERIC="nl_NL.UTF-8"
LC_TIME="nl_NL.UTF-8"
LC_ALL=
$ word='bètatest' # length: 8
$ echo ${#word}
9
Expected output: 8
Got output: 9
(bash, ksh93, mksh, and zsh all do this correctly.)
- Martijn
next reply other threads:[~2015-06-03 11:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-03 11:29 Martijn Dekker [this message]
2015-06-03 11:45 ` [BUG] ${#var} returns length in bytes, not characters Stephane Chazelas
2015-06-08 5:25 ` Herbert Xu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=556EE51D.8080100@inlv.org \
--to=martijn@inlv.org \
--cc=dash@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).