1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
<!ENTITY % entities SYSTEM "custom-entities.ent" >
%entities;
]>
<!--
This file is part of systemd.
Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="udev_device_get_syspath"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>udev_device_get_syspath</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>David</firstname>
<surname>Herrmann</surname>
<email>dh.herrmann@gmail.com</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>udev_device_get_syspath</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>udev_device_get_syspath</refname>
<refname>udev_device_get_sysname</refname>
<refname>udev_device_get_sysnum</refname>
<refname>udev_device_get_devpath</refname>
<refname>udev_device_get_devnode</refname>
<refname>udev_device_get_devnum</refname>
<refname>udev_device_get_devtype</refname>
<refname>udev_device_get_subsystem</refname>
<refname>udev_device_get_driver</refname>
<refname>udev_device_get_udev</refname>
<refname>udev_device_get_parent</refname>
<refname>udev_device_get_parent_with_subsystem_devtype</refname>
<refname>udev_device_get_is_initialized</refname>
<refname>udev_device_get_action</refname>
<refpurpose>Query device properties</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo>
<funcprototype>
<funcdef>const char *<function>udev_device_get_syspath</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_sysname</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_sysnum</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_devpath</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_devnode</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>dev_t <function>udev_device_get_devnum</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_devtype</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_subsystem</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_driver</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>struct udev *<function>udev_device_get_udev</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>struct udev_device *<function>udev_device_get_parent</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>struct udev_device *<function>udev_device_get_parent_with_subsystem_devtype</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
<paramdef>const char *<parameter>subsystem</parameter></paramdef>
<paramdef>const char *<parameter>devtype</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>udev_device_get_is_initialized</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_device_get_action</function></funcdef>
<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<!--<refsect1>
<title>Description</title>
<para>XXX: Add documentation.</para>
</refsect1>-->
<refsect1>
<title>Return Value</title>
<para>On success, <function>udev_device_get_syspath()</function>,
<function>udev_device_get_sysname()</function>,
<function>udev_device_get_sysnum()</function>,
<function>udev_device_get_devpath()</function>,
<function>udev_device_get_devnode()</function>,
<function>udev_device_get_devtype()</function>,
<function>udev_device_get_subsystem()</function>,
<function>udev_device_get_driver()</function> and
<function>udev_device_get_action()</function> return a pointer
to a constant string that describes the requested property. The
lifetime of this string is bound to the device it was requested
on. On failure, each function may return
<constant>NULL</constant>.</para>
<para>On success, <function>udev_device_get_devnum()</function>
returns the device type of the passed device. On failure, a
device type with minor and major number set to
<constant>0</constant> is returned.</para>
<para><function>udev_device_get_udev()</function> always returns
a valid pointer to the udev context that this device belongs
to.</para>
<para>On success, <function>udev_device_get_parent()</function>
and
<function>udev_device_get_parent_with_subsystem_devtype()</function>
return a pointer to the parent device. No additional reference
to this device is acquired, but the child device owns a reference
to such a parent device. On failure, <constant>NULL</constant>
is returned.</para>
<para>On success, <function>udev_device_get_is_initialized()</function> returns either <constant>1</constant> or
<constant>0</constant>, depending on whether the passed device has already been initialized by udev or not. On
failure, a negative error code is returned. Note that devices for which no udev rules are defined are never
reported initialized.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_device_has_tag</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
</para>
</refsect1>
</refentry>
|
