Line data Source code
1 : /* SPDX-License-Identifier: LGPL-2.1+ */
2 :
3 : #include <errno.h>
4 : #include <string.h>
5 :
6 : #include "sd-device.h"
7 :
8 : #include "alloc-util.h"
9 : #include "device-enumerator-private.h"
10 : #include "locale-util.h"
11 : #include "path-util.h"
12 : #include "string-util.h"
13 : #include "sysfs-show.h"
14 : #include "terminal-util.h"
15 : #include "util.h"
16 :
17 0 : static int show_sysfs_one(
18 : const char *seat,
19 : sd_device **dev_list,
20 : size_t *i_dev,
21 : size_t n_dev,
22 : const char *sub,
23 : const char *prefix,
24 : unsigned n_columns,
25 : OutputFlags flags) {
26 :
27 : size_t max_width;
28 : int r;
29 :
30 0 : assert(seat);
31 0 : assert(dev_list);
32 0 : assert(i_dev);
33 0 : assert(prefix);
34 :
35 0 : if (flags & OUTPUT_FULL_WIDTH)
36 0 : max_width = (size_t) -1;
37 0 : else if (n_columns < 10)
38 0 : max_width = 10;
39 : else
40 0 : max_width = n_columns;
41 :
42 0 : while (*i_dev < n_dev) {
43 0 : const char *sysfs, *sn, *name = NULL, *subsystem, *sysname;
44 0 : _cleanup_free_ char *k = NULL, *l = NULL;
45 : size_t lookahead;
46 : bool is_master;
47 :
48 0 : if (sd_device_get_syspath(dev_list[*i_dev], &sysfs) < 0 ||
49 0 : !path_startswith(sysfs, sub))
50 0 : return 0;
51 :
52 0 : if (sd_device_get_property_value(dev_list[*i_dev], "ID_SEAT", &sn) < 0 || isempty(sn))
53 0 : sn = "seat0";
54 :
55 : /* Explicitly also check for tag 'seat' here */
56 0 : if (!streq(seat, sn) ||
57 0 : sd_device_has_tag(dev_list[*i_dev], "seat") <= 0 ||
58 0 : sd_device_get_subsystem(dev_list[*i_dev], &subsystem) < 0 ||
59 0 : sd_device_get_sysname(dev_list[*i_dev], &sysname) < 0) {
60 0 : (*i_dev)++;
61 0 : continue;
62 : }
63 :
64 0 : is_master = sd_device_has_tag(dev_list[*i_dev], "master-of-seat") > 0;
65 :
66 0 : if (sd_device_get_sysattr_value(dev_list[*i_dev], "name", &name) < 0)
67 0 : (void) sd_device_get_sysattr_value(dev_list[*i_dev], "id", &name);
68 :
69 : /* Look if there's more coming after this */
70 0 : for (lookahead = *i_dev + 1; lookahead < n_dev; lookahead++) {
71 : const char *lookahead_sysfs;
72 :
73 0 : if (sd_device_get_syspath(dev_list[lookahead], &lookahead_sysfs) < 0)
74 0 : continue;
75 :
76 0 : if (path_startswith(lookahead_sysfs, sub) &&
77 0 : !path_startswith(lookahead_sysfs, sysfs)) {
78 : const char *lookahead_sn;
79 :
80 0 : if (sd_device_get_property_value(dev_list[lookahead], "ID_SEAT", &lookahead_sn) < 0 ||
81 0 : isempty(lookahead_sn))
82 0 : lookahead_sn = "seat0";
83 :
84 0 : if (streq(seat, lookahead_sn) && sd_device_has_tag(dev_list[lookahead], "seat") > 0)
85 0 : break;
86 : }
87 : }
88 :
89 0 : k = ellipsize(sysfs, max_width, 20);
90 0 : if (!k)
91 0 : return -ENOMEM;
92 :
93 0 : printf("%s%s%s\n", prefix, special_glyph(lookahead < n_dev ? SPECIAL_GLYPH_TREE_BRANCH : SPECIAL_GLYPH_TREE_RIGHT), k);
94 :
95 0 : if (asprintf(&l,
96 : "%s%s:%s%s%s%s",
97 : is_master ? "[MASTER] " : "",
98 : subsystem, sysname,
99 0 : name ? " \"" : "", strempty(name), name ? "\"" : "") < 0)
100 0 : return -ENOMEM;
101 :
102 0 : free(k);
103 0 : k = ellipsize(l, max_width, 70);
104 0 : if (!k)
105 0 : return -ENOMEM;
106 :
107 0 : printf("%s%s%s\n", prefix, lookahead < n_dev ? special_glyph(SPECIAL_GLYPH_TREE_VERTICAL) : " ", k);
108 :
109 0 : if (++(*i_dev) < n_dev) {
110 0 : _cleanup_free_ char *p = NULL;
111 :
112 0 : p = strjoin(prefix, lookahead < n_dev ? special_glyph(SPECIAL_GLYPH_TREE_VERTICAL) : " ");
113 0 : if (!p)
114 0 : return -ENOMEM;
115 :
116 0 : r = show_sysfs_one(seat, dev_list, i_dev, n_dev, sysfs, p,
117 0 : n_columns == (unsigned) -1 || n_columns < 2 ? n_columns : n_columns - 2,
118 : flags);
119 0 : if (r < 0)
120 0 : return r;
121 : }
122 :
123 : }
124 :
125 0 : return 0;
126 : }
127 :
128 0 : int show_sysfs(const char *seat, const char *prefix, unsigned n_columns, OutputFlags flags) {
129 0 : _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
130 0 : size_t n_dev = 0, i = 0;
131 : sd_device **dev_list;
132 : int r;
133 :
134 0 : if (n_columns <= 0)
135 0 : n_columns = columns();
136 :
137 0 : prefix = strempty(prefix);
138 :
139 0 : if (isempty(seat))
140 0 : seat = "seat0";
141 :
142 0 : r = sd_device_enumerator_new(&e);
143 0 : if (r < 0)
144 0 : return r;
145 :
146 0 : r = sd_device_enumerator_allow_uninitialized(e);
147 0 : if (r < 0)
148 0 : return r;
149 :
150 0 : r = sd_device_enumerator_add_match_tag(e, streq(seat, "seat0") ? "seat" : seat);
151 0 : if (r < 0)
152 0 : return r;
153 :
154 0 : r = device_enumerator_scan_devices(e);
155 0 : if (r < 0)
156 0 : return r;
157 :
158 0 : dev_list = device_enumerator_get_devices(e, &n_dev);
159 :
160 0 : if (dev_list && n_dev > 0)
161 0 : show_sysfs_one(seat, dev_list, &i, n_dev, "/", prefix, n_columns, flags);
162 : else
163 0 : printf("%s%s%s\n", prefix, special_glyph(SPECIAL_GLYPH_TREE_RIGHT), "(none)");
164 :
165 0 : return 0;
166 : }
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