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Date: Thu, 14 May 2026 01:31:17 +0200
Message-ID: <7db3c215735c4cbae0a6f6d742018432@debian.org>
From: Gioele Barabucci <gioele@debian.org>
Subject: psychtoolbox-3 uses pidof but does not depend on procps
X-Debian-User: gioele
Delivered-To: submit@bugs.debian.org

Source: psychtoolbox-3
Version: 3.0.19.14.dfsg1-1
Usertags: pidof-without-procps

Dear maintainer(s) of psychtoolbox-3,

it appears that psychtoolbox-3 uses `pidof` in its testsuite, or that
at least one of its binary packages uses `pidof` at runtime.
Historically, `pidof` was provided by the Essential package
`sysvinit-tools`, making an explicit dependency unnecessary. However
`pidof` will soon be moved to `procps` and will no longer be part of
the Essential set.

Please add an explicit dependency on `procps`:

* via the `Depends:` field of all binary packages of psychtoolbox-3
  that use `pidof` at runtime;
* via the `Build-Depends:` field of psychtoolbox-3, if `pidof` is
  used in tests run at build-time;
* via the `Depends:` field of `debian/control/tests`, if `pidof` is
  used in autopkgtests.

To prevent any disruption for users of psychtoolbox-3, please add
this dependency now, before `pidof` is moved from `sysvinit-utils` to
`procps`. Alternatively, you could remove all uses of `pidof`.

It is believed that psychtoolbox-3 uses `pidof` due to the following
code snippets:

```
path: psychtoolbox-3_3.0.19.14.dfsg1-1/Psychtoolbox/PsychHardware/PsychVRToolbox/PsychOpenXR.m
    % Does the metrics fifo file exist at the expected location? And monado-service is running?
    monadometricsfile = getenv('XRT_METRICS_FILE');
    [rc, ~] = system('pidof monado-service');
    if exist(monadometricsfile, 'file') && (rc == 0)
      % Yes. Try to open it. monado-service must have been launched with proper
```

Feel free to close this issue if this is a false positive (for example
if this code is in an unreachable code path).

Regards,

-- 
Gioele Barabucci
]