[Bug 1732962] Re: apport uses sys.argv instead of named arguments

[Matthieu Clemenceau]

** Changed in: apport (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: apport (Ubuntu Bionic)
       Status: New => In Progress

** Patch added: "diff for xenial to support named param. (backport from cosmic)"
   https://bugs.launchpad.net/apport/+bug/1732962/+attachment/5405275/+files/apport_2.20.1-0ubuntu2.25.debdiff

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https://bugs.launchpad.net/bugs/1732962

Title:
  apport uses sys.argv instead of named arguments

Status in Apport:
  Fix Committed
Status in apport package in Ubuntu:
  Fix Released
Status in apport source package in Trusty:
  Won't Fix
Status in apport source package in Xenial:
  In Progress
Status in apport source package in Bionic:
  In Progress
Status in apport source package in Cosmic:
  Won't Fix
Status in apport source package in Disco:
  Fix Released

Bug description:
  data/apport which processes core files expects a certain quantity of
  arguments in a specific order. This ended up causing an issue with
  some security updates where we were trying to support a new version of
  apport on a host system and one inside a container.  Here's something
  of an example:

  347 # Normal startup
  348 if len(sys.argv) not in (5, 6):
  349     try:
  350         print('Usage: %s <pid> <signal number> <core file ulimit> <dump mode> [global pid]' % sys.argv[0])
  351         print('The core dump is read from stdin.')

  We could not maintain backwards compatibility because "global pid" is
  an optional argument and "dump mode" was a new argument. So if there
  were five arguments its possible the last one was "dump mode" (no
  global pid) or "global pid" (no support for dump mode).

  Its possible to use strings in /proc/sys/kernel/core_pattern so we
  could use those and have apport accept named arguments e.g:

  $ cat /proc/sys/kernel/core_pattern
  |/usr/share/apport/apport --pid=%p --signal=%s --core-size=%c --dump-mode=%d --global-pid=%P

  ['/home/bdmurray/source-trees/apport/artful/data/apport', '--
  pid=5870', '--signal=11', '--core-size=0', '--dump-mode=1', '--global-
  pid=5870']

  Tyler said "that's probably a nice cleanup to make no matter what
  because the magic arg ordering is dangerous".

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