1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include "sysfs-show.h"
28 #include "path-util.h"
29 #include "udev-util.h"
31 static int show_sysfs_one(
34 struct udev_list_entry **item,
45 struct udev_list_entry *next, *lookahead;
46 struct udev_device *d;
47 const char *sn, *name, *sysfs, *subsystem, *sysname;
51 sysfs = udev_list_entry_get_name(*item);
52 if (!path_startswith(sysfs, sub))
55 d = udev_device_new_from_syspath(udev, sysfs);
57 *item = udev_list_entry_get_next(*item);
61 sn = udev_device_get_property_value(d, "ID_SEAT");
65 /* Explicitly also check for tag 'seat' here */
66 if (!streq(seat, sn) || !udev_device_has_tag(d, "seat")) {
68 *item = udev_list_entry_get_next(*item);
72 is_master = udev_device_has_tag(d, "master-of-seat");
74 name = udev_device_get_sysattr_value(d, "name");
76 name = udev_device_get_sysattr_value(d, "id");
77 subsystem = udev_device_get_subsystem(d);
78 sysname = udev_device_get_sysname(d);
80 /* Look if there's more coming after this */
81 lookahead = next = udev_list_entry_get_next(*item);
83 const char *lookahead_sysfs;
85 lookahead_sysfs = udev_list_entry_get_name(lookahead);
87 if (path_startswith(lookahead_sysfs, sub) &&
88 !path_startswith(lookahead_sysfs, sysfs)) {
89 struct udev_device *lookahead_d;
91 lookahead_d = udev_device_new_from_syspath(udev, lookahead_sysfs);
93 const char *lookahead_sn;
96 lookahead_sn = udev_device_get_property_value(d, "ID_SEAT");
97 if (isempty(lookahead_sn))
98 lookahead_sn = "seat0";
100 found = streq(seat, lookahead_sn) && udev_device_has_tag(lookahead_d, "seat");
101 udev_device_unref(lookahead_d);
108 lookahead = udev_list_entry_get_next(lookahead);
111 k = ellipsize(sysfs, n_columns, 20);
112 printf("%s%s%s\n", prefix, draw_special_char(lookahead ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT),
118 is_master ? "[MASTER] " : "",
120 name ? " \"" : "", name ? name : "", name ? "\"" : "") < 0) {
121 udev_device_unref(d);
125 k = ellipsize(l, n_columns, 70);
126 printf("%s%s%s\n", prefix, lookahead ? draw_special_char(DRAW_TREE_VERT) : " ",
135 p = strappend(prefix, lookahead ? draw_special_char(DRAW_TREE_VERT) : " ");
136 show_sysfs_one(udev, seat, item, sysfs, p ? p : prefix, n_columns - 2);
140 udev_device_unref(d);
146 int show_sysfs(const char *seat, const char *prefix, unsigned n_columns) {
147 _cleanup_udev_unref_ struct udev *udev;
148 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
149 struct udev_list_entry *first = NULL;
153 n_columns = columns();
165 e = udev_enumerate_new(udev);
169 if (!streq(seat, "seat0"))
170 r = udev_enumerate_add_match_tag(e, seat);
172 r = udev_enumerate_add_match_tag(e, "seat");
177 r = udev_enumerate_scan_devices(e);
181 first = udev_enumerate_get_list_entry(e);
183 show_sysfs_one(udev, seat, &first, "/", prefix, n_columns);