[Bug 1616596] Re: ziomon_util: Unexpected return code

[Dimitri John Ledkov]

These types of tests originate from the uptick of DEP-8 autopkgtests.

Whilst trivial in their nature they have been catching over time:
- miss compilation
- shared libary ABI breaks
- executables segfaulting before they get to showing version/help
- getting unexpected sigbus
- and similar.

Whilst highly unlikely to catch serious bugs, these tests are cheap
enough that when they do catch trivial bugs, they usually prevent the
OMG the whole distro is on fire. Thus the rewards are well worth the
trivial effort / CI cost. Infamous anecdote is upload of libgcc1 in
devel series that did not ship libgcc_s.so.1...

A similar test for pkg-config files is that installing -dev package, and
linking with a pkg-config generated includes for an empty file with just
includes should work. In practice it didn't, as hundreds of -dev
packages lacked the right dependencies on other -dev packages.

References:
http://autopkgtest.ubuntu.com/statistics

http://packaging.ubuntu.com/html/auto-pkg-test.html

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https://bugs.launchpad.net/bugs/1616596

Title:
  ziomon_util: Unexpected return code

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in s390-tools package in Ubuntu:
  Fix Released

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

  $ apt-cache policy s390-tools
  s390-tools:
    Installed: 1.34.0-0ubuntu8.1
    Candidate: 1.34.0-0ubuntu8.1

  When benign options such as --help or --version are passed to ziomon_util the expected output is printed but the return code is non-zero. The unexpected return code is shown here:
      ubuntu at s5lp1-gen01:~$ ziomon_util --help
      Usage: ziomon_util [-h] [-v] [-V] [-i n] [-s n] [-Q <msgq_path> -q <msgq_id>
                         -m <msg_id>] -d n -a <n> -l <lun>

      Start the monitor for the host adapter utilization.
      Example: ziomon_util -d 60 -i 4 -a 0

      -h, --help            Print usage information and exit.
      -v, --version         Print version information and exit.
      -V, --verbose         Be verbose.
      -s, --sample-length   Duration between each sample in seconds.
                            Defaults to 2 seconds.
      -i, --interval-length Aggregate samples over this duration (in seconds).
                            Defaults to 'duration'.
      -d, --duration        Overall duration in seconds.
      -a, --adapter         Host adapter no. to watch. Specify each host adapter
                            separately.
      -l, --lun             watch I/O error count of LUN. Specify each LUN
                            separately in h:b:t:l format.
      -Q, --msg-queue-name  Specify the message queue path name.
      -q, --msg-queue-id    Specify the message queue id.
      -m, --msg-id          Specify the message id to use.
      -L, --msg-id-ioerr    Specify the message id for I/O error count messages.
      ubuntu at s5lp1-gen01:~$ echo $?
      255

      ubuntu at s5lp1-gen01:~$ ziomon_util --version
      ziomon_util: ziomon utilization monitor, version 1.34.0-build-20160609
      Copyright IBM Corp. 2008
      ubuntu at s5lp1-gen01:~$ echo $?
      255

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