Cannot install uwsgi-plugin-python on Ubuntu 16.04 beta2

[Zhang Huangbin]

Cannot install uwsgi-plugin-python on Ubuntu 16.04 beta2. Steps to reproduce this issue:

*) Install a new, fresh Ubuntu 16.04 beta2 (amd64, server).
*) Install 'uwsgi-plugin-python':

# apt-get update
Get:1 http://mirrors.aliyun.com/ubuntu xenial InRelease [116 kB]
Hit:2 http://mirrors.aliyun.com/ubuntu xenial-updates InRelease
Hit:3 http://mirrors.aliyun.com/ubuntu xenial-backports InRelease
Hit:4 http://mirrors.aliyun.com/ubuntu xenial-security InRelease
Get:5 http://mirrors.aliyun.com/ubuntu xenial/main amd64 Packages [1,436 kB]
Get:6 http://mirrors.aliyun.com/ubuntu xenial/main i386 Packages [1,431 kB]
Get:7 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 Packages [7,249 kB]
Get:8 http://mirrors.aliyun.com/ubuntu xenial/universe i386 Packages [7,229 kB]
Get:9 http://mirrors.aliyun.com/ubuntu xenial/universe Translation-en [4,187 kB]
Fetched 21.6 MB in 30s (721 kB/s)
apt-get install uwsgi-plugin-python
Reading package lists... Done
root@u16:~# apt-get install uwsgi-plugin-python
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libjansson4 libmatheval1 libpython2.7 libpython2.7-minimal libpython2.7-stdlib libsodium18 libyaml-0-2 libzmq5 uwsgi-core
Suggested packages:
  nginx-full | cherokee | libapache2-mod-proxy-uwsgi | libapache2-mod-uwsgi | libapache2-mod-ruwsgi uwsgi-plugins-all
  uwsgi-extra python-uwsgidecorators
The following NEW packages will be installed:
  libjansson4 libmatheval1 libpython2.7 libpython2.7-minimal libpython2.7-stdlib libsodium18 libyaml-0-2 libzmq5 uwsgi-core
  uwsgi-plugin-python
0 upgraded, 10 newly installed, 0 to remove and 6 not upgraded.
Need to get 4,228 kB of archives.
After this operation, 18.6 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 libmatheval1 amd64 1.1.11+dfsg-2 [21.2 kB]
Get:2 http://mirrors.aliyun.com/ubuntu xenial/main amd64 libyaml-0-2 amd64 0.1.6-3 [47.6 kB]
Get:3 http://mirrors.aliyun.com/ubuntu xenial/main amd64 libjansson4 amd64 2.7-3 [26.9 kB]
Get:4 http://mirrors.aliyun.com/ubuntu xenial/main amd64 libpython2.7-minimal amd64 2.7.11-6 [336 kB]
Get:5 http://mirrors.aliyun.com/ubuntu xenial/main amd64 libpython2.7-stdlib amd64 2.7.11-6 [1,852 kB]
Get:6 http://mirrors.aliyun.com/ubuntu xenial/main amd64 libpython2.7 amd64 2.7.11-6 [1,067 kB]
Get:7 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 libsodium18 amd64 1.0.8-5 [144 kB]
Get:8 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 libzmq5 amd64 4.1.4-7 [149 kB]
Get:9 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 uwsgi-core amd64 2.0.12-4ubuntu2 [511 kB]
Get:10 http://mirrors.aliyun.com/ubuntu xenial/universe amd64 uwsgi-plugin-python amd64 2.0.12-4ubuntu2 [72.8 kB]
Fetched 4,228 kB in 3s (1,186 kB/s)
Selecting previously unselected package libmatheval1:amd64.
(Reading database ... 59763 files and directories currently installed.)
Preparing to unpack .../libmatheval1_1.1.11+dfsg-2_amd64.deb ...
Unpacking libmatheval1:amd64 (1.1.11+dfsg-2) ...
Selecting previously unselected package libyaml-0-2:amd64.
Preparing to unpack .../libyaml-0-2_0.1.6-3_amd64.deb ...
Unpacking libyaml-0-2:amd64 (0.1.6-3) ...
Selecting previously unselected package libjansson4:amd64.
Preparing to unpack .../libjansson4_2.7-3_amd64.deb ...
Unpacking libjansson4:amd64 (2.7-3) ...
Selecting previously unselected package libpython2.7-minimal:amd64.
Preparing to unpack .../libpython2.7-minimal_2.7.11-6_amd64.deb ...
Unpacking libpython2.7-minimal:amd64 (2.7.11-6) ...
Selecting previously unselected package libpython2.7-stdlib:amd64.
Preparing to unpack .../libpython2.7-stdlib_2.7.11-6_amd64.deb ...
Unpacking libpython2.7-stdlib:amd64 (2.7.11-6) ...
Selecting previously unselected package libpython2.7:amd64.
Preparing to unpack .../libpython2.7_2.7.11-6_amd64.deb ...
Unpacking libpython2.7:amd64 (2.7.11-6) ...
Selecting previously unselected package libsodium18:amd64.
Preparing to unpack .../libsodium18_1.0.8-5_amd64.deb ...
Unpacking libsodium18:amd64 (1.0.8-5) ...
Selecting previously unselected package libzmq5:amd64.
Preparing to unpack .../libzmq5_4.1.4-7_amd64.deb ...
Unpacking libzmq5:amd64 (4.1.4-7) ...
Selecting previously unselected package uwsgi-core.
Preparing to unpack .../uwsgi-core_2.0.12-4ubuntu2_amd64.deb ...
Unpacking uwsgi-core (2.0.12-4ubuntu2) ...
Selecting previously unselected package uwsgi-plugin-python.
Preparing to unpack .../uwsgi-plugin-python_2.0.12-4ubuntu2_amd64.deb ...
Unpacking uwsgi-plugin-python (2.0.12-4ubuntu2) ...
Processing triggers for libc-bin (2.23-0ubuntu2) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up libmatheval1:amd64 (1.1.11+dfsg-2) ...
Setting up libyaml-0-2:amd64 (0.1.6-3) ...
Setting up libjansson4:amd64 (2.7-3) ...
Setting up libpython2.7-minimal:amd64 (2.7.11-6) ...
Setting up libpython2.7-stdlib:amd64 (2.7.11-6) ...
Setting up libpython2.7:amd64 (2.7.11-6) ...
Setting up libsodium18:amd64 (1.0.8-5) ...
Setting up libzmq5:amd64 (4.1.4-7) ...
Setting up uwsgi-core (2.0.12-4ubuntu2) ...
Setting up uwsgi-plugin-python (2.0.12-4ubuntu2) ...
dpkg: error processing package uwsgi-plugin-python (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin (2.23-0ubuntu2) ...E: Sub-process /usr/bin/dpkg returned an error code (1)

[HittingSmoke (hittingsmoke)]

This also affects uwsgi-plugin-python3

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alexander Charykov (acharykov)]

In post install section it fails in:
      BINARY_IS_UWSGI_ALTERNATIVE="$(\
        update-alternatives --list uwsgi 2>/dev/null \
        | grep -c '/uwsgi_python$' \
      )"

root@localhost:~# update-alternatives --list uwsgi
/usr/bin/uwsgi-core
/usr/bin/uwsgi_python27

Related bug in debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818116

[Zhang Huangbin (michaelbibby)]

Another error while trying to install uwsgi-plugin-python:

Setting up uwsgi-plugin-python (2.0.12-5ubuntu1) ...
/var/lib/dpkg/info/uwsgi-plugin-python.postinst: 61: [: Illegal number:

Seems incorrect shell syntax.

[Chris Hager (chris-linuxuser)]

Still happening for me in a fully updated Ubuntu 16.04:

    Setting up uwsgi-plugin-python (2.0.12-5ubuntu1) ...
    /var/lib/dpkg/info/uwsgi-plugin-python.postinst: 61: [: Illegal number:

[Bob Balaban (bbalaban)]

Also happening to me using AWS Ubuntu 16.04 ec2

[Vertex (nikolaus993)]

I am running a fully updated Ubuntu Server 16.04 and I still facing this issue, please fix this bug:

    Setting up uwsgi-plugin-python (2.0.12-5ubuntu3.1) ...
    /var/lib/dpkg/info/uwsgi-plugin-python.postinst: 61: [: Illegal number:

thank you.

[Andreas Hasenack (ahasenack)]

Reproduced. i added -x debugging to postinst, and this is what I get:
root@xenial:~# dpkg-reconfigure uwsgi-plugin-python
+ DEFAULTFLAVOR_DOTLESS=python27
+ [ xpython27 = xpython27 ]
+ ALTERNATIVE_PRIORITY=75
+ update-alternatives --quiet --install /usr/lib/uwsgi/plugins/python_plugin.so uwsgi-plugin-python /usr/lib/uwsgi/plugins/python27_plugin.so 75 --slave /usr/bin/uwsgi_python uwsgi_python /usr/bin/uwsgi-core --slave /usr/share/man/man1/uwsgi_python.1.gz uwsgi_python.1.gz /usr/share/man/man1/uwsgi_python27.1.gz
+ update-alternatives --quiet --install /usr/bin/uwsgi uwsgi /usr/bin/uwsgi_python27 35 --slave /usr/share/man/man1/uwsgi.1.gz uwsgi.1.gz /usr/share/man/man1/uwsgi_python27.1.gz
+ update-alternatives --list uwsgi
+ grep -c /uwsgi_python$
+ true
+ BINARY_IS_UWSGI_ALTERNATIVE=
+ [ -eq 0 ]
/var/lib/dpkg/info/uwsgi-plugin-python.postinst: 61: [: Illegal number:
+ exit 0

That grep is failing to find a match:
root@xenial:~# update-alternatives --list uwsgi
/usr/bin/uwsgi-core
/usr/bin/uwsgi_python27

The error is happening because the grep fails to find a match, and "| true", it should have been "|| true".

And I now found the debian bug about it, and the fix. It's fixed since 2.0.12-6.