1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Industrial I/O utilities - lsiio.c
4 *
5 * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
6 */
7
8 #include <string.h>
9 #include <dirent.h>
10 #include <stdio.h>
11 #include <errno.h>
12 #include <stdint.h>
13 #include <stdlib.h>
14 #include <unistd.h>
15 #include <sys/types.h>
16 #include <sys/stat.h>
17 #include <sys/dir.h>
18 #include "iio_utils.h"
19
20 static enum verbosity {
21 VERBLEVEL_DEFAULT, /* 0 gives lspci behaviour */
22 VERBLEVEL_SENSORS, /* 1 lists sensors */
23 } verblevel = VERBLEVEL_DEFAULT;
24
25 const char *type_device = "iio:device";
26 const char *type_trigger = "trigger";
27
28 static inline int check_prefix(const char *str, const char *prefix)
29 {
30 return strlen(str) > strlen(prefix) &&
31 strncmp(str, prefix, strlen(prefix)) == 0;
32 }
33
34 static inline int check_postfix(const char *str, const char *postfix)
35 {
36 return strlen(str) > strlen(postfix) &&
37 strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
38 }
39
40 static int dump_channels(const char *dev_dir_name)
41 {
42 DIR *dp;
43 const struct dirent *ent;
44
45 dp = opendir(dev_dir_name);
46 if (!dp)
47 return -errno;
48
49 while (ent = readdir(dp), ent)
50 if (check_prefix(ent->d_name, "in_") &&
51 (check_postfix(ent->d_name, "_raw") ||
52 check_postfix(ent->d_name, "_input")))
53 printf(" %-10s\n", ent->d_name);
54
55 return (closedir(dp) == -1) ? -errno : 0;
56 }
57
58 static int dump_one_device(const char *dev_dir_name)
59 {
60 char name[IIO_MAX_NAME_LENGTH];
61 int dev_idx;
62 int ret;
63
64 ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device), "%i",
65 &dev_idx);
66 if (ret != 1)
67 return -EINVAL;
68
69 ret = read_sysfs_string("name", dev_dir_name, name);
70 if (ret < 0)
71 return ret;
72
73 printf("Device %03d: %s\n", dev_idx, name);
74
75 if (verblevel >= VERBLEVEL_SENSORS)
76 return dump_channels(dev_dir_name);
77
78 return 0;
79 }
80
81 static int dump_one_trigger(const char *dev_dir_name)
82 {
83 char name[IIO_MAX_NAME_LENGTH];
84 int dev_idx;
85 int ret;
86
87 ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
88 "%i", &dev_idx);
89 if (ret != 1)
90 return -EINVAL;
91
92 ret = read_sysfs_string("name", dev_dir_name, name);
93 if (ret < 0)
94 return ret;
95
96 printf("Trigger %03d: %s\n", dev_idx, name);
97
98 return 0;
99 }
100
101 static int dump_devices(void)
102 {
103 const struct dirent *ent;
104 int ret;
105 DIR *dp;
106
107 dp = opendir(iio_dir);
108 if (!dp) {
109 fprintf(stderr, "No industrial I/O devices available\n");
110 return -ENODEV;
111 }
112
113 while (ent = readdir(dp), ent) {
114 if (check_prefix(ent->d_name, type_device)) {
115 char *dev_dir_name;
116
117 if (asprintf(&dev_dir_name, "%s%s", iio_dir,
118 ent->d_name) < 0) {
119 ret = -ENOMEM;
120 goto error_close_dir;
121 }
122
123 ret = dump_one_device(dev_dir_name);
124 if (ret) {
125 free(dev_dir_name);
126 goto error_close_dir;
127 }
128
129 free(dev_dir_name);
130 if (verblevel >= VERBLEVEL_SENSORS)
131 printf("\n");
132 }
133 }
134 rewinddir(dp);
135 while (ent = readdir(dp), ent) {
136 if (check_prefix(ent->d_name, type_trigger)) {
137 char *dev_dir_name;
138
139 if (asprintf(&dev_dir_name, "%s%s", iio_dir,
140 ent->d_name) < 0) {
141 ret = -ENOMEM;
142 goto error_close_dir;
143 }
144
145 ret = dump_one_trigger(dev_dir_name);
146 if (ret) {
147 free(dev_dir_name);
148 goto error_close_dir;
149 }
150
151 free(dev_dir_name);
152 }
153 }
154
155 return (closedir(dp) == -1) ? -errno : 0;
156
157 error_close_dir:
158 if (closedir(dp) == -1)
159 perror("dump_devices(): Failed to close directory");
160
161 return ret;
162 }
163
164 int main(int argc, char **argv)
165 {
166 int c, err = 0;
167
168 while ((c = getopt(argc, argv, "v")) != EOF) {
169 switch (c) {
170 case 'v':
171 verblevel++;
172 break;
173
174 case '?':
175 default:
176 err++;
177 break;
178 }
179 }
180 if (err || argc > optind) {
181 fprintf(stderr, "Usage: lsiio [options]...\n"
182 "List industrial I/O devices\n"
183 " -v Increase verbosity (may be given multiple times)\n");
184 exit(1);
185 }
186
187 return dump_devices();
188 }
189
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