[Bug 1768798] Re: netplan try: terminal does not echo keypresses after ^C during wait

[Launchpad Bug Tracker]

This bug was fixed in the package netplan.io - 0.40.1~18.04.3

---------------
netplan.io (0.40.1~18.04.3) bionic; urgency=medium

  * Fix idempotency in renaming: bond members should be exempt from rename, as
    they may all share a single MAC for the bond device. (LP: #1802322)
  * tests/integration.py: add test designed to catch the above regression.

netplan.io (0.40.1~18.04.2) bionic; urgency=medium

  * Fix typo breaking rename on 'netplan apply'. (LP: #1770082)

netplan.io (0.40.1~18.04.1) bionic; urgency=medium

  * Backport netplan 0.40.1 to 18.04. (LP: #1793309)

netplan.io (0.40.1) cosmic; urgency=medium

  * tests/generate.py: use random.sample() instead of random.choices() to
    better support older pythons.
  * Deal gracefully with empty files on 'netplan apply' (LP: #1795343)

netplan.io (0.40) cosmic; urgency=medium

  * New upstream release:
    - networkd: route source is PreferredSource= not From=
    - Improve NetworkManager error reporting on unrenderable routes.
    - Don't render ipv4 dns-search unless we have an ipv4 address.
      (LP: #1786726)
    - Set permissive umask on networkd .network, .link and .netdev files
      (LP: #1736965, LP: #1768560)
    - Fix support for link-scope routes. (LP: #1747455)
    - Update man pages for deletion of replug code.
    - Spell Gratuitous ARP correctly and make it work. (LP: #1756701)
    - Many typo fixes for documentation. (LP: #1783940)
    - Various build system fixes.
    - Fix integration tests:
      - iproute2 output changes for link-scope routes
      - fix stability of networkd igmp-resend test
      - fix manual_addresses test now that networkd lists ~. domain
    - Deduplicate code for parsing interface options
    - Add support for optional-addresses.

netplan.io (0.39) cosmic; urgency=medium

  * New upstream release:
    - Allow link-local addresses to be configured. (LP: #1771704)
    - Forces bridges with no addresses to be brought online. (LP: #1736975)

netplan.io (0.38) cosmic; urgency=medium

  * New upstream release:
    - Write udev .rules files to /run/udev/rules.d to enforce interface
      renaming. (LP: #1770082)
    - Don't traceback for 'netplan ip leases' when iface is not managed or
      doesn't DHCP (LP: #1768823)
    - Fix duplicate "/" path separator in error messages (LP: #1771440)
    - Fix incorrect terminal reset in 'netplan try' on Ctrl-C. (LP: #1768798)
    - Updated doc entries: mtu, fix fwmark->mark, cleanup optional.
      (LP: #1768783)
    - Added documentation validation at build.
    - Added configuration example for multi-ip interfaces.
  * tests/integration.py: fix test_eth_and_bridge autopkg test harder.
  * debian/control:
    - Add iproute2 to Depends.
    - Add python3-netifaces to Depends, Build-Depends.

 -- Mathieu Trudel-Lapierre <cyphermox at ubuntu.com>  Wed, 21 Nov 2018
14:42:59 -0500

** Changed in: netplan.io (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1768798

Title:
  netplan try: terminal does not echo keypresses after ^C during wait

Status in netplan.io package in Ubuntu:
  Fix Released
Status in netplan.io source package in Bionic:
  Fix Released

Bug description:
  [Impact]
  All netplan users.

  [Test case]
  1) Run 'sudo netplan try' to "try" a new netplan config.
  2) Hit Control-C during the timer, to escape to the terminal without applying the configuration.

  Validate that text typed on the terminal after hitting Control-C is
  correctly echoed on screen.

  [Regression Potential]
  Some non-standard shells may behave differently with the console and expect a specific set of modes. Care has been taken to correctly record and restore the original terminal modes and flags, as well as testing on bash, dash, zsh, in a text VT, etc; but it is possible for non-standard terminals to misunderstand the mode changes and thus incorrectly handle Control-C or other mode changes required by 'netplan try' leading to failure to echo characters, mishandling carriage returns, clears, or invalid color schemes on terminal.

  --

  If I do netplan try, press ^C during the wait, and try to type, my
  characters are not echoed to the terminal.

  (This is similar to what powersj found in
  https://asciinema.org/a/176782 but different in that instead of Enter
  it's ^C that triggers it.)

  I think you'll need to trap KeyboardInterrupt exceptions and reset
  afterwards? or use a try/finally construct to make sure things are
  reset?

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