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// SPDX-License-Identifier: GPL-2.0-only
/*
* Industrial I/O utilities - lsiio.c
*
* Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
*/
#include <string.h>
#include <dirent.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include "iio_utils.h"
static enum verbosity {
VERBLEVEL_DEFAULT, /* 0 gives lspci behaviour */
VERBLEVEL_SENSORS, /* 1 lists sensors */
} verblevel = VERBLEVEL_DEFAULT;
const char *type_device = "iio:device";
const char *type_trigger = "trigger";
static inline int check_prefix(const char *str, const char *prefix)
{
return strlen(str) > strlen(prefix) &&
strncmp(str, prefix, strlen(prefix)) == 0;
}
static inline int check_postfix(const char *str, const char *postfix)
{
return strlen(str) > strlen(postfix) &&
strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
}
static int dump_channels(const char *dev_dir_name)
{
DIR *dp;
const struct dirent *ent;
dp = opendir(dev_dir_name);
if (!dp)
return -errno;
while (ent = readdir(dp), ent)
if (check_prefix(ent->d_name, "in_") &&
(check_postfix(ent->d_name, "_raw") ||
check_postfix(ent->d_name, "_input")))
printf(" %-10s\n", ent->d_name);
return (closedir(dp) == -1) ? -errno : 0;
}
static int dump_one_device(const char *dev_dir_name)
{
char name[IIO_MAX_NAME_LENGTH];
int dev_idx;
int ret;
ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device), "%i",
&dev_idx);
if (ret != 1)
return -EINVAL;
ret = read_sysfs_string("name", dev_dir_name, name);
if (ret < 0)
return ret;
printf("Device %03d: %s\n", dev_idx, name);
if (verblevel >= VERBLEVEL_SENSORS)
return dump_channels(dev_dir_name);
return 0;
}
static int dump_one_trigger(const char *dev_dir_name)
{
char name[IIO_MAX_NAME_LENGTH];
int dev_idx;
int ret;
ret = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
"%i", &dev_idx);
if (ret != 1)
return -EINVAL;
ret = read_sysfs_string("name", dev_dir_name, name);
if (ret < 0)
return ret;
printf("Trigger %03d: %s\n", dev_idx, name);
return 0;
}
static int dump_devices(void)
{
const struct dirent *ent;
int ret;
DIR *dp;
dp = opendir(iio_dir);
if (!dp) {
fprintf(stderr, "No industrial I/O devices available\n");
return -ENODEV;
}
while (ent = readdir(dp), ent) {
if (check_prefix(ent->d_name, type_device)) {
char *dev_dir_name;
if (asprintf(&dev_dir_name, "%s%s", iio_dir,
ent->d_name) < 0) {
ret = -ENOMEM;
goto error_close_dir;
}
ret = dump_one_device(dev_dir_name);
if (ret) {
free(dev_dir_name);
goto error_close_dir;
}
free(dev_dir_name);
if (verblevel >= VERBLEVEL_SENSORS)
printf("\n");
}
}
rewinddir(dp);
while (ent = readdir(dp), ent) {
if (check_prefix(ent->d_name, type_trigger)) {
char *dev_dir_name;
if (asprintf(&dev_dir_name, "%s%s", iio_dir,
ent->d_name) < 0) {
ret = -ENOMEM;
goto error_close_dir;
}
ret = dump_one_trigger(dev_dir_name);
if (ret) {
free(dev_dir_name);
goto error_close_dir;
}
free(dev_dir_name);
}
}
return (closedir(dp) == -1) ? -errno : 0;
error_close_dir:
if (closedir(dp) == -1)
perror("dump_devices(): Failed to close directory");
return ret;
}
int main(int argc, char **argv)
{
int c, err = 0;
while ((c = getopt(argc, argv, "v")) != EOF) {
switch (c) {
case 'v':
verblevel++;
break;
case '?':
default:
err++;
break;
}
}
if (err || argc > optind) {
fprintf(stderr, "Usage: lsiio [options]...\n"
"List industrial I/O devices\n"
" -v Increase verbosity (may be given multiple times)\n");
exit(1);
}
return dump_devices();
}
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