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(str: ent->d_name, prefix: "in_" ) && |
51 | (check_postfix(str: ent->d_name, postfix: "_raw" ) || |
52 | check_postfix(str: ent->d_name, postfix: "_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(filename: "name" , basedir: dev_dir_name, str: 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(filename: "name" , basedir: dev_dir_name, str: 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(str: ent->d_name, prefix: 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(str: ent->d_name, prefix: 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 | |