Public bug reported:
dash in 14.04 has an odd bug in /bin/sh.
$ var="[abc"
$ echo "${var#[}"
[abc
That *should* output just 'abc' (and does everywhere other than
14.04).
It is fairly easily workaroundable by quoting the '[':
$ var="[abc"
echo ${var#"["}
To demonstrate:
$ lxc launch ubuntu-daily:trusty shbug
$ lxc exec shbug /bin/bash
% /bin/sh -c 'v=$0; echo ${v#[}' "[abc"
[abc
% dpkg -S /bin/sh
diversion by dash from: /bin/sh
diversion by dash to: /bin/sh.distrib
dash: /bin/sh
% dpkg-query --show dash
dash 0.5.7-4ubuntu1
% exit
## show that on host, this works as expected.
$ /bin/sh -c 'v=$0; echo ${v#[}' "[abc"
abc
$ dpkg-query --show dash
dash 0.5.8-2.3ubuntu1
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: dash 0.5.7-4ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic i686
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: i386
Date: Tue May 9 20:13:57 2017
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: dash
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: dash (Ubuntu)
Importance: Medium
Status: Fix Released
** Affects: dash (Ubuntu Trusty)
Importance: Medium
Status: Confirmed
** Tags: apport-bug i386 trusty uec-images
** Changed in: dash (Ubuntu)
Status: New => Fix Released
** Changed in: dash (Ubuntu)
Importance: Undecided => Medium
** Also affects: dash (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: dash (Ubuntu Trusty)
Status: New => Confirmed
** Changed in: dash (Ubuntu Trusty)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1689648
Title:
removing open bracket ([) via ${var#[} does not work.
Status in dash package in Ubuntu:
Fix Released
Status in dash source package in Trusty:
Confirmed
Bug description:
dash in 14.04 has an odd bug in /bin/sh.
$ var="[abc"
$ echo "${var#[}"
[abc
That *should* output just 'abc' (and does everywhere other than
14.04).
It is fairly easily workaroundable by quoting the '[':
$ var="[abc"
echo ${var#"["}
To demonstrate:
$ lxc launch ubuntu-daily:trusty shbug
$ lxc exec shbug /bin/bash
% /bin/sh -c 'v=$0; echo ${v#[}' "[abc"
[abc
% dpkg -S /bin/sh
diversion by dash from: /bin/sh
diversion by dash to: /bin/sh.distrib
dash: /bin/sh
% dpkg-query --show dash
dash 0.5.7-4ubuntu1
% exit
## show that on host, this works as expected.
$ /bin/sh -c 'v=$0; echo ${v#[}' "[abc"
abc
$ dpkg-query --show dash
dash 0.5.8-2.3ubuntu1
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: dash 0.5.7-4ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic i686
ApportVersion: 2.14.1-0ubuntu3.23
Architecture: i386
Date: Tue May 9 20:13:57 2017
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: dash
UpgradeStatus: No upgrade log present (probably fresh install)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/dash/+bug/1689648/+subscriptions
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