140d88165c
Create the following ioctl and implement it at the media device level to query device information. - MEDIA_IOC_DEVICE_INFO: Query media device information The ioctl and its data structure are defined in the new kernel header linux/media.h available to userspace applications. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
60 lines
1.4 KiB
XML
60 lines
1.4 KiB
XML
<refentry id="media-func-close">
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<refmeta>
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<refentrytitle>media close()</refentrytitle>
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&manvol;
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</refmeta>
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<refnamediv>
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<refname>media-close</refname>
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<refpurpose>Close a media device</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <unistd.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>close</function></funcdef>
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<paramdef>int <parameter>fd</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Arguments</title>
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<variablelist>
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<varlistentry>
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<term><parameter>fd</parameter></term>
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<listitem>
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<para>&fd;</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Description</title>
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<para>Closes the media device. Resources associated with the file descriptor
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are freed. The device configuration remain unchanged.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para><function>close</function> returns 0 on success. On error, -1 is
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returned, and <varname>errno</varname> is set appropriately. Possible error
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codes are:</para>
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<variablelist>
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<varlistentry>
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<term><errorcode>EBADF</errorcode></term>
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<listitem>
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<para><parameter>fd</parameter> is not a valid open file descriptor.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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</refentry>
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