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5</span><hr><div class="refentry"><a name="sd_journal_stream_fd"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_journal_stream_fd — Create log stream file descriptor to the journal</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <systemd/sd-journal.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_journal_stream_fd</b>(</code></td><td>const char *<var class="pdparam">identifier</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">priority</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">level_prefix</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm214173639024"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="function">sd_journal_stream_fd()</code> may
+ <a href="../libudev/index.html">gudev </a><span style="float:right">systemd 21
7</span><hr><div class="refentry"><a name="sd_journal_stream_fd"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_journal_stream_fd — Create log stream file descriptor to the journal</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <systemd/sd-journal.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_journal_stream_fd</b>(</code></td><td>const char *<var class="pdparam">identifier</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">priority</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">level_prefix</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm214192036416"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="function">sd_journal_stream_fd()</code> may
be used to create a log stream file descriptor. Log
messages written to this file descriptor as simple
newline-separated text strings are written to the
<code class="constant">LOG_INFO</code>,
<code class="constant">LOG_DEBUG</code>, as defined in
<code class="filename">syslog.h</code>, see
- <a href="syslog.html"><span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span></a>
+ <a href="http://man7.org/linux/man-pages/man3/syslog.3.html"><span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span></a>
for details. The third argument is a boolean: if true
kernel-style log priority level prefixes (such as
<code class="constant">SD_WARNING</code>) are interpreted, see
<a href="sd-daemon.html"><span class="citerefentry"><span class="refentrytitle">sd-daemon</span>(3)</span></a>
for more information.</p><p>It is recommended that applications log UTF-8
messages only with this API, but this is not
- enforced.</p></div><div class="refsect1"><a name="idm2141
73632368"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>The call returns a valid write-only file descriptor on success or a
- negative errno-style error code.</p></div><div class="refsect1"><a name="idm2141
73631056"></a><h2 id="Notes">Notes<a class="headerlink" title="Permalink to this headline" href="#Notes">¶</a></h2><p>The <code class="function">sd_journal_stream_fd()</code>
+ enforced.</p></div><div class="refsect1"><a name="idm2141
95925936"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>The call returns a valid write-only file descriptor on success or a
+ negative errno-style error code.</p></div><div class="refsect1"><a name="idm2141
95924624"></a><h2 id="Notes">Notes<a class="headerlink" title="Permalink to this headline" href="#Notes">¶</a></h2><p>The <code class="function">sd_journal_stream_fd()</code>
interface is available as a shared library, which can
be compiled and linked to with the
- <code class="constant">libsystemd</code> <a href="pkg-config.html"><span class="citerefentry"><span class="refentrytitle">pkg-config</span>(1)</span></a>
- file.</p></div><div class="refsect1"><a name="idm2141
73627664"></a><h2 id="Examples">Examples<a class="headerlink" title="Permalink to this headline" href="#Examples">¶</a></h2><p>Creating a log stream suitable for
- <a href="
fprintf.html"><span class="citerefentry"><span class="refentrytitle">fprintf</span>(3)</span></a>:</p><pre class="programlisting">#include <syslog.h>
+ <code class="constant">libsystemd</code> <a href="http://linux.die.net/man/1/pkg-config"><span class="citerefentry"><span class="refentrytitle">pkg-config</span>(1)</span></a>
+ file.</p></div><div class="refsect1"><a name="idm2141
95921120"></a><h2 id="Examples">Examples<a class="headerlink" title="Permalink to this headline" href="#Examples">¶</a></h2><p>Creating a log stream suitable for
+ <a href="
http://man7.org/linux/man-pages/man3/fprintf.3.html"><span class="citerefentry"><span class="refentrytitle">fprintf</span>(3)</span></a>:</p><pre class="programlisting">#include <syslog.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
fprintf(log, SD_WARNING "This is a warning!\n");
fclose(log);
return 0;
-}</pre></div><div class="refsect1"><a name="idm2141
73625024"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
+}</pre></div><div class="refsect1"><a name="idm2141
95916128"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="sd-journal.html"><span class="citerefentry"><span class="refentrytitle">sd-journal</span>(3)</span></a>,
<a href="sd-daemon.html"><span class="citerefentry"><span class="refentrytitle">sd-daemon</span>(3)</span></a>,
<a href="sd_journal_print.html"><span class="citerefentry"><span class="refentrytitle">sd_journal_print</span>(3)</span></a>,
- <a href="syslog.html"><span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span></a>,
- <a href="fprintf.html"><span class="citerefentry"><span class="refentrytitle">fprintf</span>(3)</span></a>,
+ <a href="http://man7.org/linux/man-pages/man3/syslog.3.html"><span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span></a>,
+ <a href="http://man7.org/linux/man-pages/man3/fprintf.3.html"><span class="citerefentry"><span class="refentrytitle">fprintf</span>(3)</span></a>,
<a href="systemd.journal-fields.html"><span class="citerefentry"><span class="refentrytitle">systemd.journal-fields</span>(7)</span></a>
</p></div></div></body></html>
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