[Bug 1913609] Re: Ungraceful failure when locale postinstallation script can't modify files it shouldn't

[Avamander]

*** This bug is a duplicate of bug 1908928 ***
    https://bugs.launchpad.net/bugs/1908928

Even if we ignore all that, the very least it should prompt the user if
the file should be replaced with the maintainer version or be kept as
is.

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https://bugs.launchpad.net/bugs/1913609

Title:
  Ungraceful failure when locale postinstallation script can't modify
  files it shouldn't

Status in glibc package in Ubuntu:
  New

Bug description:
  When the files /etc/locale.gen, /etc/default/locale and
  /var/lib/locales/supported.d/en are locked down to avoid any
  unnecessary modifications done to them, the post-installation script
  of locales fails ungracefully when trying to sed (due to write
  permission denial).

  Those files are locked down because some updates decide to suddenly
  start generating a massive amount of locales and it can have
  disastrous effects if there's not a lot of storage e.g.
  https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1908928

  There should really be no need to overwrite or modify those files by
  the package's installation without asking, this needs an user prompt
  or the user config must be kept.

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