2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "alloc-util.h"
26 #include "locale-util.h"
27 #include "path-util.h"
28 #include "string-util.h"
29 #include "sysfs-show.h"
30 #include "terminal-util.h"
31 #include "udev-util.h"
34 static int show_sysfs_one(
37 struct udev_list_entry **item,
48 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
49 struct udev_list_entry *next, *lookahead;
50 const char *sn, *name, *sysfs, *subsystem, *sysname;
51 _cleanup_free_ char *k = NULL, *l = NULL;
54 sysfs = udev_list_entry_get_name(*item);
55 if (!path_startswith(sysfs, sub))
58 d = udev_device_new_from_syspath(udev, sysfs);
60 *item = udev_list_entry_get_next(*item);
64 sn = udev_device_get_property_value(d, "ID_SEAT");
68 /* Explicitly also check for tag 'seat' here */
69 if (!streq(seat, sn) || !udev_device_has_tag(d, "seat")) {
70 *item = udev_list_entry_get_next(*item);
74 is_master = udev_device_has_tag(d, "master-of-seat");
76 name = udev_device_get_sysattr_value(d, "name");
78 name = udev_device_get_sysattr_value(d, "id");
79 subsystem = udev_device_get_subsystem(d);
80 sysname = udev_device_get_sysname(d);
82 /* Look if there's more coming after this */
83 lookahead = next = udev_list_entry_get_next(*item);
85 const char *lookahead_sysfs;
87 lookahead_sysfs = udev_list_entry_get_name(lookahead);
89 if (path_startswith(lookahead_sysfs, sub) &&
90 !path_startswith(lookahead_sysfs, sysfs)) {
91 _cleanup_udev_device_unref_ struct udev_device *lookahead_d = NULL;
93 lookahead_d = udev_device_new_from_syspath(udev, lookahead_sysfs);
95 const char *lookahead_sn;
97 lookahead_sn = udev_device_get_property_value(d, "ID_SEAT");
98 if (isempty(lookahead_sn))
99 lookahead_sn = "seat0";
101 if (streq(seat, lookahead_sn) && udev_device_has_tag(lookahead_d, "seat"))
106 lookahead = udev_list_entry_get_next(lookahead);
109 k = ellipsize(sysfs, n_columns, 20);
113 printf("%s%s%s\n", prefix, special_glyph(lookahead ? TREE_BRANCH : TREE_RIGHT), k);
117 is_master ? "[MASTER] " : "",
119 name ? " \"" : "", strempty(name), name ? "\"" : "") < 0)
123 k = ellipsize(l, n_columns, 70);
127 printf("%s%s%s\n", prefix, lookahead ? special_glyph(TREE_VERTICAL) : " ", k);
131 _cleanup_free_ char *p = NULL;
133 p = strappend(prefix, lookahead ? special_glyph(TREE_VERTICAL) : " ");
137 show_sysfs_one(udev, seat, item, sysfs, p, n_columns - 2);
144 int show_sysfs(const char *seat, const char *prefix, unsigned n_columns) {
145 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
146 _cleanup_udev_unref_ struct udev *udev = NULL;
147 struct udev_list_entry *first = NULL;
151 n_columns = columns();
163 e = udev_enumerate_new(udev);
167 if (!streq(seat, "seat0"))
168 r = udev_enumerate_add_match_tag(e, seat);
170 r = udev_enumerate_add_match_tag(e, "seat");
174 r = udev_enumerate_add_match_is_initialized(e);
178 r = udev_enumerate_scan_devices(e);
182 first = udev_enumerate_get_list_entry(e);
184 show_sysfs_one(udev, seat, &first, "/", prefix, n_columns);
186 printf("%s%s%s\n", prefix, special_glyph(TREE_RIGHT), "(none)");