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<h3>
Daniel Kahn Gillmor pushed to branch master
at <a href="https://salsa.debian.org/pkg-privacy-team/monkeysphere">Privacy Maintainers / monkeysphere</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://salsa.debian.org/pkg-privacy-team/monkeysphere/commit/48785b0e71407d5c45de89df024d1afce65454a6">48785b0e</a></strong>
<div>
<span>by Daniel Kahn Gillmor</span>
<i>at 2019-03-05T19:19:34Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">tests/keytrans: Avoid hangs when run with subprocesses

When bash 5.0 uses process replacement [0], the main process gets
invoked with child processes already present.

This wreaks havoc with our understanding of what "wait" does, and can
make the test suite hang (see https://bugs.debian.org/920038).  So we
introduce this check to make sure that there are no running
subprocesses.

This is particularly problematic because debian's autopkgtest *does*
invoke the test suite in this way.

Note that there might be some weird race condition here -- we allow
there to be 1 subprocess, which is the spawned "ps" program itself.
but how ps works on a given platform, and whether it will notice (and
count) itself, i don't know.  But it WorksForMe™ on debian buster.

[0] e.g., bash's process replacement looks like this:

    tests/keytrans > >(tee $TMPDIR/stdout)
</pre>
</li>
</ul>
<h4>1 changed file:</h4>
<ul>
<li class="file-stats">
<a href="#3fca73a8f8638148e4297d7c782b615b2566d775">
tests/keytrans
</a>
</li>
</ul>
<h4>Changes:</h4>
<li id="3fca73a8f8638148e4297d7c782b615b2566d775">
<a href="https://salsa.debian.org/pkg-privacy-team/monkeysphere/commit/48785b0e71407d5c45de89df024d1afce65454a6#3fca73a8f8638148e4297d7c782b615b2566d775"><strong>tests/keytrans</strong></a>
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<pre style="margin: 0;"> <span id="LC7" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;">#   Jameson Rollins <jrollins@fifthhorseman.net></span></span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;">#   Micah Anderson <micah@riseup.net> </span></span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;">#</span></span>
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<pre style="margin: 0;">-<span id="LC10" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># Copyright: 2008-20<span class="idiff left right">0</span>9</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># Copyright: 2008-20<span class="idiff left right">1</span>9</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># License: GPL v3 or later</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="shell"></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># these tests should all be able to run as a non-privileged user.</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -17,6 +17,14 @@ set -e</td>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># piped commands should return the code of the first non-zero return</span></span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="shell"><span class="nb" style="color: #0086b3;">set</span> <span class="nt" style="color: navy;">-o</span> pipefail</span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="shell"></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="shell"><span class="nb" style="color: #0086b3;">declare</span> <span class="nt" style="color: navy;">-a</span> <span class="nv" style="color: teal;">child_procs</span><span class="o" style="font-weight: 600;">=(</span><span class="k" style="font-weight: 600;">$(</span>ps <span class="nt" style="color: navy;">-o</span> pid h <span class="nt" style="color: navy;">--ppid</span> <span class="nv" style="color: teal;">$$</span><span class="k" style="font-weight: 600;">)</span><span class="o" style="font-weight: 600;">)</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="shell"><span class="k" style="font-weight: 600;">if</span> <span class="o" style="font-weight: 600;">[</span> <span class="s2" style="color: #d14;">"</span><span class="k" style="font-weight: 600;">${#</span><span class="nv" style="color: teal;">child_procs</span><span class="p">[@]</span><span class="k" style="font-weight: 600;">}</span><span class="s2" style="color: #d14;">"</span> <span class="nt" style="color: navy;">-gt</span> 1 <span class="o" style="font-weight: 600;">]</span><span class="p">;</span> <span class="k" style="font-weight: 600;">then</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="shell"><span class="k" style="font-weight: 600;">    </span><span class="nb" style="color: #0086b3;">printf</span> <span class="s1" style="color: #d14;">'found %d pre-existing child processes: %s\n'</span> <span class="s2" style="color: #d14;">"</span><span class="k" style="font-weight: 600;">${#</span><span class="nv" style="color: teal;">child_procs</span><span class="p">[@]</span><span class="k" style="font-weight: 600;">}</span><span class="s2" style="color: #d14;">"</span> <span class="s2" style="color: #d14;">"</span><span class="k" style="font-weight: 600;">${</span><span class="nv" style="color: teal;">child_procs</span><span class="p">[*]</span><span class="k" style="font-weight: 600;">}</span><span class="s2" style="color: #d14;">"</span></span>
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<td class="diff-line-num new new_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
23
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<td class="line_content new noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC23" class="line" lang="shell">    <span class="nb" style="color: #0086b3;">printf</span> <span class="s2" style="color: #d14;">"spawning my own subprocess to avoid https://bugs.debian.org/920038...</span><span class="se" style="color: #d14;">\n</span><span class="s2" style="color: #d14;">"</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
24
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<td class="line_content new noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC24" class="line" lang="shell">    <span class="s2" style="color: #d14;">"</span><span class="nv" style="color: teal;">$0</span><span class="s2" style="color: #d14;">"</span> <span class="s2" style="color: #d14;">"</span><span class="nv" style="color: teal;">$@</span><span class="s2" style="color: #d14;">"</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
25
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<td class="line_content new noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC25" class="line" lang="shell">    <span class="nb" style="color: #0086b3;">exit</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
26
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<td class="line_content new noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC26" class="line" lang="shell"><span class="k" style="font-weight: 600;">fi</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
27
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<td class="line_content new noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC27" class="line" lang="shell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
20
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<td class="diff-line-num new_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
28
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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC28" class="line" lang="shell"><span class="c" style="color: #998; font-style: italic;"># make sure the TESTDIR is an absolute path, not a relative one.</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="21" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
21
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<td class="diff-line-num new_line" data-linenumber="29" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
29
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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC29" class="line" lang="shell"><span class="nb" style="color: #0086b3;">export </span><span class="nv" style="color: teal;">TESTDIR</span><span class="o" style="font-weight: 600;">=</span><span class="k" style="font-weight: 600;">$(</span><span class="nb" style="color: #0086b3;">cd</span> <span class="k" style="font-weight: 600;">$(</span><span class="nb" style="color: #0086b3;">dirname</span> <span class="s2" style="color: #d14;">"</span><span class="nv" style="color: teal;">$0</span><span class="s2" style="color: #d14;">"</span><span class="k" style="font-weight: 600;">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="nb" style="color: #0086b3;">pwd</span><span class="k" style="font-weight: 600;">)</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
22
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<td class="diff-line-num new_line" data-linenumber="30" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
30
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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC30" class="line" lang="shell"></span>
</pre>
</td>
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