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11#include <string.h>
12#include <dirent.h>
13#include <stdio.h>
14#include <errno.h>
15#include <stdint.h>
16#include <stdlib.h>
17#include <unistd.h>
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <sys/dir.h>
21#include "iio_utils.h"
22
23static enum verbosity {
24 VERBLEVEL_DEFAULT,
25 VERBLEVEL_SENSORS,
26} verblevel = VERBLEVEL_DEFAULT;
27
28const char *type_device = "iio:device";
29const char *type_trigger = "trigger";
30
31static inline int check_prefix(const char *str, const char *prefix)
32{
33 return strlen(str) > strlen(prefix) &&
34 strncmp(str, prefix, strlen(prefix)) == 0;
35}
36
37static inline int check_postfix(const char *str, const char *postfix)
38{
39 return strlen(str) > strlen(postfix) &&
40 strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
41}
42
43static int dump_channels(const char *dev_dir_name)
44{
45 DIR *dp;
46 const struct dirent *ent;
47
48 dp = opendir(dev_dir_name);
49 if (!dp)
50 return -errno;
51
52 while (ent = readdir(dp), ent)
53 if (check_prefix(ent->d_name, "in_") &&
54 (check_postfix(ent->d_name, "_raw") ||
55 check_postfix(ent->d_name, "_input")))
56 printf(" %-10s\n", ent->d_name);
57
58 return (closedir(dp) == -1) ? -errno : 0;
59}
60
61static int dump_one_device(const char *dev_dir_name)
62{
63 char name[IIO_MAX_NAME_LENGTH];
64 int dev_idx;
65 int ret;
66
67 ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device), "%i",
68 &dev_idx);
69 if (ret != 1)
70 return -EINVAL;
71
72 ret = read_sysfs_string("name", dev_dir_name, name);
73 if (ret < 0)
74 return ret;
75
76 printf("Device %03d: %s\n", dev_idx, name);
77
78 if (verblevel >= VERBLEVEL_SENSORS)
79 return dump_channels(dev_dir_name);
80
81 return 0;
82}
83
84static int dump_one_trigger(const char *dev_dir_name)
85{
86 char name[IIO_MAX_NAME_LENGTH];
87 int dev_idx;
88 int ret;
89
90 ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
91 "%i", &dev_idx);
92 if (ret != 1)
93 return -EINVAL;
94
95 ret = read_sysfs_string("name", dev_dir_name, name);
96 if (ret < 0)
97 return ret;
98
99 printf("Trigger %03d: %s\n", dev_idx, name);
100
101 return 0;
102}
103
104static int dump_devices(void)
105{
106 const struct dirent *ent;
107 int ret;
108 DIR *dp;
109
110 dp = opendir(iio_dir);
111 if (!dp) {
112 fprintf(stderr, "No industrial I/O devices available\n");
113 return -ENODEV;
114 }
115
116 while (ent = readdir(dp), ent) {
117 if (check_prefix(ent->d_name, type_device)) {
118 char *dev_dir_name;
119
120 if (asprintf(&dev_dir_name, "%s%s", iio_dir,
121 ent->d_name) < 0) {
122 ret = -ENOMEM;
123 goto error_close_dir;
124 }
125
126 ret = dump_one_device(dev_dir_name);
127 if (ret) {
128 free(dev_dir_name);
129 goto error_close_dir;
130 }
131
132 free(dev_dir_name);
133 if (verblevel >= VERBLEVEL_SENSORS)
134 printf("\n");
135 }
136 }
137 rewinddir(dp);
138 while (ent = readdir(dp), ent) {
139 if (check_prefix(ent->d_name, type_trigger)) {
140 char *dev_dir_name;
141
142 if (asprintf(&dev_dir_name, "%s%s", iio_dir,
143 ent->d_name) < 0) {
144 ret = -ENOMEM;
145 goto error_close_dir;
146 }
147
148 ret = dump_one_trigger(dev_dir_name);
149 if (ret) {
150 free(dev_dir_name);
151 goto error_close_dir;
152 }
153
154 free(dev_dir_name);
155 }
156 }
157
158 return (closedir(dp) == -1) ? -errno : 0;
159
160error_close_dir:
161 if (closedir(dp) == -1)
162 perror("dump_devices(): Failed to close directory");
163
164 return ret;
165}
166
167int main(int argc, char **argv)
168{
169 int c, err = 0;
170
171 while ((c = getopt(argc, argv, "v")) != EOF) {
172 switch (c) {
173 case 'v':
174 verblevel++;
175 break;
176
177 case '?':
178 default:
179 err++;
180 break;
181 }
182 }
183 if (err || argc > optind) {
184 fprintf(stderr, "Usage: lsiio [options]...\n"
185 "List industrial I/O devices\n"
186 " -v Increase verbosity (may be given multiple times)\n");
187 exit(1);
188 }
189
190 return dump_devices();
191}
192
