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authorLaurent Bercot <ska-skaware@skarnet.org>2015-01-14 01:21:41 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2015-01-14 01:21:41 +0000
commit20c7d8e1b328155145ce9e8648435e127b60c208 (patch)
tree815d32c86d451d11c25c75314de452acc5389af5 /doc/s6-tcpserver4.html
parent44f44bafaa2dfcaa90e5ad20e8ca34413bb7ab49 (diff)
downloads6-networking-20c7d8e1b328155145ce9e8648435e127b60c208.tar.xz
Doc update
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@@ -40,6 +40,9 @@ socket and stdout writing to it. </li>
<li> Depending on the verbosity level, it logs what it does to stderr. </li>
<li> It runs until killed by a signal. Depending on the received
signal, it may kill its children before exiting. </li>
+ <li> s6-tcpserver4 actually doesn't do any of this itself. It is
+a wrapper, rewriting the command line and executing into a chain
+of programs that perform those duties. </li>
</ul>
<h2> Environment variables </h2>
@@ -117,6 +120,16 @@ possible overhead. Features such as additional environment variables,
access control and DNS resolution are provided
via the <a href="s6-tcpserver-access.html">s6-tcpserver-access</a>
program. </li>
+ <li> In previous releases of s6-networking, s6-tcpserver4 was
+monolithic: it did the work of
+<a href="s6-tcpserver4-socketbinder.html">s6-tcpserver4-socketbinder</a>,
+<a href="http://skarnet.org/software/s6/s6-applyuidgid.html">s6-applyuidgid</a> and
+<a href="s6-tcpserver4d.html">s6-tcpserver4d</a> itself. The functionality has now
+been split into several different programs because some service startup
+schemes require the daemon to get its socket from an external
+program instead of creating and binding it itself. The most obvious
+application of this is upgrading a long-lived process without
+losing existing connections. </li>
</ul>
</body>