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docs: note that udev doesn't deal with binary attribute values (#11383) 

Related to #5329.
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Sam Morris 2019-01-10 17:05:34 +00:00 committed by Zbigniew Jędrzejewski-Szmek
parent 4e4bbc439e
commit 8e44f5710b
1 changed files with 9 additions and 2 deletions
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11
man/udev_device_has_tag.xml
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@ -109,12 +109,19 @@
<function>udev_device_get_property_value()</function> and
<function>udev_device_get_sysattr_value()</function> return a
pointer to a constant string of the requested value. On error,
<constant>NULL</constant> is returned.</para>
<constant>NULL</constant> is returned. Attributes that may
contain <constant>NUL</constant> bytes should not be retrieved
with <function>udev_device_get_sysattr_value()</function>;
instead, read them directly from the files within the device's
<property>syspath</property>.</para>
<para>On success,
<function>udev_device_set_sysattr_value()</function> returns
an integer greater than, or equal to, <constant>0</constant>.
On failure, a negative error code is returned.</para>
On failure, a negative error code is returned. Values that
contain <constant>NUL</constant> bytes should not be set with
this function; instead, write them directly to the files within
the device's <property>syspath</property>.</para>
<para>On success, <function>udev_device_has_tag()</function>
returns <constant>1</constant> or <constant>0</constant>,