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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2017-10-22 17:09:25 +0000 |
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| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2017-10-22 17:09:25 +0000 |
| commit | 32759d402e7327865ea18a203bd1c09f98735bd1 (patch) | |
| tree | 73c53e1e70df6c23c9c32a73bff0161317f4e9c4 /doc/mdevd-coldplug.html | |
| download | mdevd-32759d402e7327865ea18a203bd1c09f98735bd1.tar.xz | |
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| -rw-r--r-- | doc/mdevd-coldplug.html | 74 |
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diff --git a/doc/mdevd-coldplug.html b/doc/mdevd-coldplug.html new file mode 100644 index 0000000..8355df3 --- /dev/null +++ b/doc/mdevd-coldplug.html @@ -0,0 +1,74 @@ +<html> + <head> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <title>mdevd: the mdevd-coldplug program</title> + <meta name="Description" content="mdevd: the mdevd-coldplug program" /> + <meta name="Keywords" content="mdevd linux administration root utilities devd mdev-s uevent netlink coldplug boot" /> + <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> + </head> +<body> + +<p> +<a href="index.html">mdevd</a><br /> +<a href="//skarnet.org/software/">Software</a><br /> +<a href="//skarnet.org/">skarnet.org</a> +</p> + +<h1> The <tt>mdevd-coldplug</tt> program </h1> + +<p> +<tt>mdevd-coldplug</tt> performs a <em>coldplug</em>: it scans +<tt>/sys</tt> for all registered devices an uevent manager would +want to perform actions on, and generates uevents for all these +devices. +</p> + +<h2> Interface </h2> + +<pre> + mdevd-coldplug [ -s <em>slashsys</em> ] +</pre> + +<ul> + <li> mdevd-coldplug scans <tt>/sys</tt> for devices. </li> + <li> For every suitable device it finds, it generates an +uevent and writes it to its stdout, using the same format +as <a href="mdevd-netlink.html">mdevd-netlink</a>. </li> + <li> It exits when it has finished scanning. </li> +</ul> + +<p> + This implies that the <tt>mdevd-coldplug | mdevd</tt> command line +will function as a coldplug manager, just like <tt>mdev -s</tt>. +</p> + +<h2> Options </h2> + +<ul> + <li> <tt>-s</tt> <em>slashsys</em> : assume the sysfs +pseudo-filesystem is mounted on <em>slashsys</em>. Default is <tt>/sys</tt>. </li> +</ul> + +<h2> Exit codes </h2> + +<ul> + <li> 0: success </li> + <li> 111: system call failed </li> +</ul> + +<h2> Notes </h2> + +<ul> + <li> mdevd-coldplug is a short-lived program, just like +<tt>mdev -s</tt>. </li> + <li> Unlike <tt>mdev -s</tt>, however, mdevd-coldplug does +not act on the uevents it generates. It simply prints them. +This allows for easy debugging. </li> + <li> To act on the uevents, simply pipe the output of +<tt>mdevd-coldplug</tt> into <a href="mdevd.html">mdevd</a>. </li> +</ul> + +</body> +</html> |