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doc: cross link sd_listen_fd() docs a bit

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Let's make sure the sd_listen_fd() docs are really found from the
.socket file documentation as well as the FileDescriptorStoreMax=
documentation.

Let's also emphasize that that's where the order in which the fds are
passed are documented.

Fixes: #16647
This commit is contained in:
Lennart Poettering
2020-09-01 16:20:34 +02:00
committed by Zbigniew Jędrzejewski-Szmek
parent 0419dae715
commit df2f58176d
3 changed files with 35 additions and 38 deletions
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man/systemd.socket.xml
+8 -10
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@@ -81,16 +81,14 @@
services, as well as parallelized starting of services. See the
blog stories linked at the end for an introduction.</para>
<para>Note that the daemon software configured for socket
activation with socket units needs to be able to accept sockets
from systemd, either via systemd's native socket passing interface
(see
<citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>
for details) or via the traditional
<citerefentry project='freebsd'><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>-style
socket passing (i.e. sockets passed in via standard input and
output, using <varname>StandardInput=socket</varname> in the
service file).</para>
<para>Note that the daemon software configured for socket activation with socket units needs to be able
to accept sockets from systemd, either via systemd's native socket passing interface (see
<citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry> for
details about the precise protocol used and the order in which the file descriptors are passed) or via
traditional <citerefentry
project='freebsd'><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>-style
socket passing (i.e. sockets passed in via standard input and output, using
<varname>StandardInput=socket</varname> in the service file).</para>
<para>All network sockets allocated through <filename>.socket</filename> units are allocated in the host's network
namespace (see <citerefentry