diff options
Diffstat (limited to 'static/netbsd/man4/man4.prep/nvram.4 3.html')
| -rw-r--r-- | static/netbsd/man4/man4.prep/nvram.4 3.html | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/static/netbsd/man4/man4.prep/nvram.4 3.html b/static/netbsd/man4/man4.prep/nvram.4 3.html deleted file mode 100644 index b4823126..00000000 --- a/static/netbsd/man4/man4.prep/nvram.4 3.html +++ /dev/null @@ -1,89 +0,0 @@ -<table class="head"> - <tr> - <td class="head-ltitle">NVRAM(4)</td> - <td class="head-vol">Device Drivers Manual (prep)</td> - <td class="head-rtitle">NVRAM(4)</td> - </tr> -</table> -<div class="manual-text"> -<section class="Sh"> -<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1> -<p class="Pp"><code class="Nm">nvram</code> — <span class="Nd">PReP nvram - interface</span></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1> -<p class="Pp"><code class="In">#include - <<a class="In">machine/nvram.h</a>></code></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> -<p class="Pp">The file <code class="Nm">/dev/nvram</code> is an interface to the - PReP NVRAM, including the Global Environment Area. This interface is highly - stylized; ioctls are used for all operations. These ioctls refer to - individual variables in the Global Environment Area and their values.</p> -<p class="Pp">The calls that take and/or return a variable use a pointer to an - <code class="Li">int</code> variable for this purpose; others use a pointer - to an <code class="Li">struct pnviocdesc</code> descriptor, which contains a - variable and two counted strings. The first string comprises the fields - <code class="Li">pnv_namelen</code> (an <code class="Li">int</code>) and - <code class="Li">pnv_name</code> (a <code class="Li">char *</code>), giving - the name of a field. The second string comprises the fields - <code class="Li">pnv_buflen</code> and <code class="Li">pnv_buf</code>, used - analogously. These two counted strings work in a - “value-result” fashion. At entry to the ioctl, the counts are - expected to reflect the buffer size; on return, the counts are updated to - reflect the buffer contents.</p> -<p class="Pp">The following ioctls are supported:</p> -<dl class="Bl-tag"> - <dt>PNVIOCGETNEXTNAME</dt> - <dd>Takes a variable name and returns the name of the following variable. If a - <code class="Dv">NULL</code> is passed as the variable name, the first - variable name will be returned. If the last variable is given as an - argument, the ioctl will return <code class="Er">EINVAL</code>.</dd> - <dt id="PNVIOCGET"><a class="permalink" href="#PNVIOCGET"><code class="Dv">PNVIOCGET</code></a></dt> - <dd>Fills in the value of the named property for the given variable. If no - such property is associated with that variable, the value length is set to - -1. If the named property exists but has no value, the value length is set - to 0.</dd> - <dt id="PNVIOCSET"><a class="permalink" href="#PNVIOCSET"><code class="Dv">PNVIOCSET</code></a></dt> - <dd>Writes the given value under the given name.</dd> - <dt id="PNVIOCGETNUMGE"><a class="permalink" href="#PNVIOCGETNUMGE"><code class="Dv">PNVIOCGETNUMGE</code></a></dt> - <dd>Returns the number of variables in the Global Environment Area.</dd> -</dl> -</section> -<section class="Sh"> -<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1> -<p class="Pp"><span class="Pa">/dev/nvram</span></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1> -<p class="Pp">The following may result in rejection of an operation:</p> -<dl class="Bl-tag"> - <dt id="EINVAL">[<a class="permalink" href="#EINVAL"><code class="Er">EINVAL</code></a>]</dt> - <dd>The given variable name does not exist; or the buffer set up to retrieve - values from the nvram was not large enough to hold the result.</dd> -</dl> -</section> -<section class="Sh"> -<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE - ALSO</a></h1> -<p class="Pp"><a class="Xr">ioctl(2)</a></p> -<p class="Pp"><span class="Pa">PowerPC Reference Platform Specification Version - 1.1, Section 5.5</span></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1> -<p class="Pp">Due to limitations within the <code class="Nm">nvram</code> - itself, these functions run at elevated priority and may adversely affect - system performance.</p> -<p class="Pp"><code class="Dv">PNVIOCSET</code> is not currently supported, - making the <code class="Nm">nvram</code> driver read-only at this time.</p> -</section> -</div> -<table class="foot"> - <tr> - <td class="foot-date">March 1, 2007</td> - <td class="foot-os">NetBSD 10.1</td> - </tr> -</table> |