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<body class="manpage">
<div id="header">
<h1>
on_demand_service_tool(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>on_demand_service_tool -
Load and unload on-demand Mach services registered with launchd(8)
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">Synopsis</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><strong>on_demand_service_tool</strong> <strong>-L</strong> <strong>-l</strong> <em>LABEL</em> [<em>OPTION…</em>] <em>COMMAND</em> [<em>ARG…</em>]
<strong>on_demand_service_tool</strong> <strong>-U</strong> <strong>-l</strong> <em>LABEL</em></pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">Description</h2>
<div class="sectionbody">
<div class="paragraph"><p>On-demand services may be registered with launchd(8) by using the <strong>--load</strong> form.
One or more service names may be registered with the bootstrap server by
specifying <strong>--mach-service</strong>. When a Mach message is sent to any of these
services, launchd(8) will invoke <em>COMMAND</em> along with any arguments specified
(<em>ARG…</em>). <em>COMMAND</em> must be an absolute pathname.</p></div>
<div class="paragraph"><p>The <strong>--unload</strong> form unregisters jobs registered with launchd(8).</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">Options</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
<strong>-L</strong>, <strong>--load</strong>
</dt>
<dd>
<p>
Registers a job with launchd(8). <strong>--label</strong>=<em>LABEL</em> and <em>COMMAND</em> are required.
This operation may also be referred to as “load” or “submit”.
</p>
</dd>
<dt class="hdlist1">
<strong>-U</strong>, <strong>--unload</strong>
</dt>
<dd>
<p>
Unregisters a job with launchd(8). <strong>--label</strong>=<em>LABEL</em> is required. This operation
may also be referred to as “unload” or “remove”.
</p>
</dd>
<dt class="hdlist1">
<strong>-l</strong>, <strong>--label</strong>=<em>LABEL</em>
</dt>
<dd>
<p>
<em>LABEL</em> is used as the job label to identify the job to launchd(8). <em>LABEL</em> must
be unique within a launchd(8) context.
</p>
</dd>
<dt class="hdlist1">
<strong>-m</strong>, <strong>--mach-service</strong>=<em>SERVICE</em>
</dt>
<dd>
<p>
In conjunction with <strong>--load</strong>, registers <em>SERVICE</em> with the bootstrap server.
Clients will be able to obtain a send right by looking up the <em>SERVICE</em> name
with the bootstrap server. When a message is sent to such a Mach port,
launchd(8) will invoke <em>COMMAND</em> along with any arguments specified (<em>ARG…</em>) if
it is not running. This forms the “on-demand” nature referenced by this tools
name. This option may appear zero, one, or more times. <em>SERVICE</em> must be unique
within a bootstrap context.
</p>
</dd>
<dt class="hdlist1">
<strong>--help</strong>
</dt>
<dd>
<p>
Display help and exit.
</p>
</dd>
<dt class="hdlist1">
<strong>--version</strong>
</dt>
<dd>
<p>
Output version information and exit.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">Examples</h2>
<div class="sectionbody">
<div class="paragraph"><p>Registers an on-demand server that will execute <a href="catch_exception_tool.html">catch_exception_tool(1)</a>
when a Mach message is sent to a Mach port obtained from the bootstrap server by
looking up the name <span class="monospaced">svc</span>:</p></div>
<div class="listingblock">
<div class="content monospaced">
<pre>$ <strong>on_demand_service_tool --load --label=catch_exception \
--mach-service=svc \
$(which catch_exception_tool) --mach-service=svc \
--file=/tmp/out --persistent --timeout=0</strong></pre>
</div></div>
<div class="paragraph"><p>Unregisters the on-demand server installed above:</p></div>
<div class="listingblock">
<div class="content monospaced">
<pre>$ <strong>on_demand_service_tool --unload --label=catch_exception</strong></pre>
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_exit_status">Exit Status</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
<strong>0</strong>
</dt>
<dd>
<p>
Success.
</p>
</dd>
<dt class="hdlist1">
<strong>1</strong>
</dt>
<dd>
<p>
Failure, with a message printed to the standard error stream.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">See Also</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="catch_exception_tool.html">catch_exception_tool(1)</a>,
<a href="exception_port_tool.html">exception_port_tool(1)</a>,
launchctl(1)</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_resources">Resources</h2>
<div class="sectionbody">
<div class="paragraph"><p>Crashpad home page: <a href="https://crashpad.chromium.org/">https://crashpad.chromium.org/</a>.</p></div>
<div class="paragraph"><p>Report bugs at <a href="https://crashpad.chromium.org/bug/new">https://crashpad.chromium.org/bug/new</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_copyright">Copyright</h2>
<div class="sectionbody">
<div class="paragraph"><p>Copyright 2016
<a href="https://chromium.googlesource.com/crashpad/crashpad/+/master/AUTHORS">The
Crashpad Authors</a>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_license">License</h2>
<div class="sectionbody">
<div class="paragraph"><p>Licensed under the Apache License, Version 2.0 (the “License”);
you may not use this file except in compliance with the License.
You may obtain a copy of the License at</p></div>
<div class="literalblock">
<div class="content monospaced">
<pre><a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a></pre>
</div></div>
<div class="paragraph"><p>Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an “AS IS” BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr></div>
<div id="footer">
<div id="footer-text">
Crashpad 0.8.0<br>
Last updated April 1, 2015
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