[Bug 1716190] [NEW] apt-key does not output to non-terminals

[Jon Gorrono]

Public bug reported:

A common idiom for checking fingerprints for keys begins with:
' apt-key fingerprint $key|grep fingerprint|...'
... this works up to thru jessie at least.. in zesty apt-key gives a 'warning' but produces no output.

"Warning: apt-key output should not be parsed (stdout is not a terminal)"
If the lack of output is intended and is meant to be a proscription, it is overreaching at best. A warning makes perfect sense.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: apt 1.4
ProcVersionSignature: Ubuntu 4.10.0-32.36-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: amd64
Date: Sun Sep 10 01:23:46 2017
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug uec-images zesty

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https://bugs.launchpad.net/bugs/1716190

Title:
  apt-key does not output to non-terminals

Status in apt package in Ubuntu:
  New

Bug description:
  A common idiom for checking fingerprints for keys begins with:
  ' apt-key fingerprint $key|grep fingerprint|...'
  ... this works up to thru jessie at least.. in zesty apt-key gives a 'warning' but produces no output.

  "Warning: apt-key output should not be parsed (stdout is not a terminal)"
  If the lack of output is intended and is meant to be a proscription, it is overreaching at best. A warning makes perfect sense.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: apt 1.4
  ProcVersionSignature: Ubuntu 4.10.0-32.36-generic 4.10.17
  Uname: Linux 4.10.0-32-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4.5
  Architecture: amd64
  Date: Sun Sep 10 01:23:46 2017
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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