[Bug 1806728] [NEW] shell config /etc/profile does not set $PATH

[mila nuts]

Public bug reported:

lsb_release -rd
Description:	Ubuntu 16.04.5 LTS
Release:	16.04

apt-cache policy base-files
base-files:
  Installed: 9.4ubuntu4.7

grep -e PATH -e environment /usr/share/base-files/profile | wc -l
0

expectation:
/etc/profile should source /etc/environment to set the $PATH variable

reality:
/etc/profile does not set $PATH

scenario:
when chroot-ing from arch linux into ubuntu linux,
and running 'source /etc/profile'
then $PATH does not contain /bin:/sbin:/usr/sbin
which are needed to run 'apt-get update && apt-get upgrade'

... otherwise 'apt-get update' fails with
Unknown error executing apt-key

and 'apt-get upgrade' fails with
Processing triggers for cracklib-runtime (2.9.2-1ubuntu1) ...
/var/lib/dpkg/info/cracklib-runtime.postinst: 7: /var/lib/dpkg/info/cracklib-runtime.postinst: update-cracklib: not found
dpkg: error processing package cracklib-runtime (--unpack):
 subprocess installed post-installation script returned error exit status 127

only after 'source /etc/environment' all runs fine.

/etc/environment vs /etc/profile:
environment is for all programs, profile is only for shells.
but shells also need the $PATH variable,
so including environment in profile does make sense, at least to me.

** Affects: base-files (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1806728

Title:
  shell config /etc/profile does not set $PATH

Status in base-files package in Ubuntu:
  New

Bug description:
  lsb_release -rd
  Description:	Ubuntu 16.04.5 LTS
  Release:	16.04

  apt-cache policy base-files
  base-files:
    Installed: 9.4ubuntu4.7

  grep -e PATH -e environment /usr/share/base-files/profile | wc -l
  0

  expectation:
  /etc/profile should source /etc/environment to set the $PATH variable

  reality:
  /etc/profile does not set $PATH

  scenario:
  when chroot-ing from arch linux into ubuntu linux,
  and running 'source /etc/profile'
  then $PATH does not contain /bin:/sbin:/usr/sbin
  which are needed to run 'apt-get update && apt-get upgrade'

  ... otherwise 'apt-get update' fails with
  Unknown error executing apt-key

  and 'apt-get upgrade' fails with
  Processing triggers for cracklib-runtime (2.9.2-1ubuntu1) ...
  /var/lib/dpkg/info/cracklib-runtime.postinst: 7: /var/lib/dpkg/info/cracklib-runtime.postinst: update-cracklib: not found
  dpkg: error processing package cracklib-runtime (--unpack):
   subprocess installed post-installation script returned error exit status 127

  only after 'source /etc/environment' all runs fine.

  /etc/environment vs /etc/profile:
  environment is for all programs, profile is only for shells.
  but shells also need the $PATH variable,
  so including environment in profile does make sense, at least to me.

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