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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/128790/">https://git.reviewboard.kde.org/r/128790/</a>
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<p style="margin-top: 0;">On August 28th, 2016, 1:41 p.m. UTC, <b>Oswald Buddenhagen</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">uhm, and why do you think utempter is the preferred choice?
last time i checked, nobody was shipping konsole setgid utmp. with kdeinit, that's not even an option.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">there are several options how to deal with this:
- fork()/wait() around the utempter calls, so it can't mess with the signal handling of the current process. though i seem to remmber that the addToUtmp() call actually uses the PID
- re-implement the libutempter calls with QProcess. that's actually how it was originally, but was changed because there were incompatible versions of utempter - but that seems like a minor concern compared to the status quo.
- drop utmp handling altogether, as it's been mostly superseded, first by consolekit, and now logind. however, respective bindings would have to be actually implemented, and i have no clue how things are supposed to be done. just some dbus calls?
-- what about non-linux systems?</p></pre>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><blockquote style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid #bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;">
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">uhm, and why do you think utempter is the preferred choice?
last time i checked, nobody was shipping konsole setgid utmp. with kdeinit, that's not even an option.</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Why is the fallback code there at all, then?</p>
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<li style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">fork()/wait() around the utempter calls, so it can't mess with the signal handling of the current process. though i seem to remmber that the addToUtmp() call actually uses the PID</li>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Won't that break if another process exits at the wrong time?</p>
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<li style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">re-implement the libutempter calls with QProcess. that's actually how it was originally, but was changed because there were incompatible versions of utempter - but that seems like a minor concern compared to the status quo.</li>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I looked at that as well, the issue is finding the correct path for the utempter helper.</p>
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<li style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">drop utmp handling altogether, as it's been mostly superseded, first by consolekit, and now logind. however, respective bindings would have to be actually implemented, and i have no clue how things are supposed to be done. just some dbus calls?</li>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">There seems to be a simple dbus call to register with logind at least. I tried looking briefly at it, but I couldn't quickly find any logind code that did utmp stuff. I didn't look very hard, though.</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">-- what about non-linux systems?</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">libutempter only supports Linux and FreeBSD, the fallback code seems to at least try to be compatible with other platforms.</p></pre>
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<p>- Martin Tobias Holmedahl</p>
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<p>On August 28th, 2016, 1:13 p.m. UTC, Martin Tobias Holmedahl Sandsmark wrote:</p>
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<div>Review request for KDE Frameworks, David Faure, Kurt Hindenburg, Rex Dieter, and Thiago Macieira.</div>
<div>By Martin Tobias Holmedahl Sandsmark.</div>
<p style="color: grey;"><i>Updated Aug. 28, 2016, 1:13 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=364779">364779</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kpty
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">According to the investigation in https://bugs.kde.org/show_bug.cgi?id=364779 utempter does stuff in a way that isn't compatible with QProcess/KProcess/KPtyProcess (calling sigaction() before launching its child process). So remove it, and rely on the fallback methods already implemented.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>CMakeLists.txt <span style="color: grey">(3e17cac)</span></li>
<li>KF5PtyConfig.cmake.in <span style="color: grey">(66f8c43)</span></li>
<li>cmake/FindUTEMPTER.cmake <span style="color: grey">(a3ea06a)</span></li>
<li>src/CMakeLists.txt <span style="color: grey">(caab96f)</span></li>
<li>src/ConfigureChecks.cmake <span style="color: grey">(ded08f4)</span></li>
<li>src/config-pty.h.cmake <span style="color: grey">(aaaf8d9)</span></li>
<li>src/kpty.cpp <span style="color: grey">(15c3b81)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/128790/diff/" style="margin-left: 3em;">View Diff</a></p>
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