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man: mention that stdout logging works the same as stderr logging

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Apparently people wondered about that:

https://lists.freedesktop.org/archives/systemd-devel/2020-March/044091.html
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Lennart Poettering 2020-03-31 15:59:29 +02:00 committed by Zbigniew Jędrzejewski-Szmek
parent 47203ed085
commit 9e76a88faf
1 changed files with 8 additions and 10 deletions
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18
man/sd-daemon.xml
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@ -68,16 +68,14 @@
#define SD_INFO "<6>" /* informational */
#define SD_DEBUG "&lt;7&gt;" /* debug-level messages */</programlisting>
<para>These prefixes are intended to be used in conjunction with
stderr-based logging as implemented by systemd. If a systemd
service definition file is configured with
<varname>StandardError=journal</varname>,
<varname>StandardError=syslog</varname> or
<varname>StandardError=kmsg</varname>, these prefixes can be used
to encode a log level in lines printed. This is similar to the
kernel <function>printk()</function>-style logging. See
<citerefentry><refentrytitle>klogctl</refentrytitle><manvolnum>2</manvolnum></citerefentry>
for more information.</para>
<para>These prefixes are intended to be used in conjunction with stderr-based logging (or stdout-based
logging) as implemented by systemd. If a systemd service definition file is configured with
<varname>StandardError=journal</varname>, <varname>StandardError=syslog</varname> or
<varname>StandardError=kmsg</varname> (and similar with <varname>StandardOutput=</varname>), these
prefixes can be used to encode a log level in lines printed. This is similar to the kernel
<function>printk()</function>-style logging. See
<citerefentry><refentrytitle>klogctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> for more
information.</para>
<para>The log levels are identical to
<citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>'s