Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > gnu.bash.bug > #14805
| Path | csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail |
|---|---|
| From | Grisha Levit <grishalevit@gmail.com> |
| Newsgroups | gnu.bash.bug |
| Subject | null array[*] expansion not treated as null |
| Date | Mon, 12 Nov 2018 16:32:06 -0500 |
| Lines | 13 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.3945.1542058363.1284.bug-bash@gnu.org> (permalink) |
| NNTP-Posting-Host | lists.gnu.org |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset="UTF-8" |
| X-Trace | usenet.stanford.edu 1542058364 4057 208.118.235.17 (12 Nov 2018 21:32:44 GMT) |
| X-Complaints-To | action@cs.stanford.edu |
| To | bug-bash <bug-bash@gnu.org> |
| Envelope-to | bug-bash@gnu.org |
| DKIM-Signature | v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=6bV8BVtET4MkiIxhQGWfdciGIhs2Ho2BQ5PhGlm/iqc=; b=WHPS55TJQUrBPY95kTZfqhNlEBWTExgyz5nwMveLxX2x3rFS3dop4q+bgEGIKseHta sd8kxVMsv0+KGVezYOdTQSyISk6sn8l6NKJjawkOnieHBKOYOGd+L/BSVjR8s02NEJeU eoLJbi/LIa6uamXnb8uxxz+/wi5g+pck/cOUfJoTeP/xx5OdTdVF97LBrDHCwlv0DKzz rfYXlp4sjEo3VrLZao0Np+MysaR2eAgV8jkXJ+BeE8ak9P5gGRPIeizkIXZ+bamrYFLk leGdqjA7kJFpHNTr8/RdyR1Tw4KPa+sCyo8o+A/+kAkyCUHOAWDgyGDywDbK/kBvvaAx w7KA== |
| X-Google-DKIM-Signature | v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=6bV8BVtET4MkiIxhQGWfdciGIhs2Ho2BQ5PhGlm/iqc=; b=gflYDLBTxAdI5JLAg7wfxoXtjNXIZooqfi4IkNmMYTQFp7trH7KwN1TCv6FKQvERnT XtoO4iHhHEk/uS4IYhRMURRBpQnR+8IL1z+JXwVge9OYv8rm98CskZdn5RA+yCIdWVcu Ewo7BJnp2D1tp2fTHEfh0IJ/GG64m9fQanB3i5D/nqHvT3MLTgNPKaaoK8borcM1oZel kpWjEJknon/UWzqyulP2T+307IKE74EFm2dUSxaotkLeFGQHejCqZU4cgdevFkaSiF7r dCRbbAJu2m8AcMDouQk+bCd5AAdiU3tUlHlwTn6UuPJxyWMURPdsigSGd7DEF6haIa/Z iUxQ== |
| X-Gm-Message-State | AGRZ1gLBlRn4MTdsKMGgM2vcgfv32JDCwouM13h5snjvQhthN+8acJ57 Ml6gEa2lyO4N1oOkIJeXam/x5VO7Cizvf+MumQDfP/QRKBc= |
| X-Google-Smtp-Source | AJdET5dgALeubTOoL5YOWP6h/Asl0j3BETeWroeTHDaQVS6Kb3d+RcgB6+XUcCmhDBl2PivI9wi+N0wpYvPuXlz0/KE= |
| X-Received | by 2002:ac8:30ac:: with SMTP id v41mr2507149qta.51.1542058337666; Mon, 12 Nov 2018 13:32:17 -0800 (PST) |
| X-detected-operating-system | by eggs.gnu.org: Genre and OS details not recognized. |
| X-Received-From | 2607:f8b0:4864:20::72e |
| X-Content-Filtered-By | Mailman/MimeDel 2.1.21 |
| X-BeenThere | bug-bash@gnu.org |
| X-Mailman-Version | 2.1.21 |
| Precedence | list |
| List-Id | Bug reports for the GNU Bourne Again SHell <bug-bash.gnu.org> |
| List-Unsubscribe | <https://lists.gnu.org/mailman/options/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=unsubscribe> |
| List-Archive | <http://lists.gnu.org/archive/html/bug-bash/> |
| List-Post | <mailto:bug-bash@gnu.org> |
| List-Help | <mailto:bug-bash-request@gnu.org?subject=help> |
| List-Subscribe | <https://lists.gnu.org/mailman/listinfo/bug-bash>, <mailto:bug-bash-request@gnu.org?subject=subscribe> |
| Xref | csiph.com gnu.bash.bug:14805 |
Show key headers only | View raw
When an array A has non-zero elements but the expansion of "${A[*]}" is
still
a null string, it is not treated as such for purposes of ${var:-X} expansion
(though $* is treated as null in the same circumstance).
$ A=(''); set -- ''
$ echo "<${A[*]:-X}>" "<${*:-X}>"
<> <X>
$ IFS=
$ A=('' ''); set -- '' ''
$ echo "<${A[*]:-X}>" "<${*:-X}>"
<> <X>
Back to gnu.bash.bug | Previous | Next | Find similar | Unroll thread
null array[*] expansion not treated as null Grisha Levit <grishalevit@gmail.com> - 2018-11-12 16:32 -0500
csiph-web