ssize_t iiod_client_read_attr(struct iiod_client *client, int desc,
const struct iio_device *dev, const struct iio_channel *chn,
const char *attr, char *dest, size_t len, bool is_debug)
{
const char *id = iio_device_get_id(dev);
char buf[1024];
ssize_t ret;
if (attr) {
if (chn) {
if (!iio_channel_find_attr(chn, attr))
return -ENOENT;
} else if (is_debug) {
if (!iio_device_find_debug_attr(dev, attr))
return -ENOENT;
} else {
if (!iio_device_find_attr(dev, attr))
return -ENOENT;
}
}
if (chn)
snprintf(buf, sizeof(buf), "READ %s %s %s %s\r\n", id,
iio_channel_is_output(chn) ? "OUTPUT" : "INPUT",
iio_channel_get_id(chn), attr ? attr : "");
else if (is_debug)
snprintf(buf, sizeof(buf), "READ %s DEBUG %s\r\n",
id, attr ? attr : "");
else
snprintf(buf, sizeof(buf), "READ %s %s\r\n",
id, attr ? attr : "");
iio_mutex_lock(client->lock);
ret = (ssize_t) iiod_client_exec_command(client, desc, buf);
if (ret < 0)
goto out_unlock;
if ((size_t) ret + 1 > len) {
ret = -EIO;
goto out_unlock;
}
/* +1: Also read the trailing \n */
ret = iiod_client_read_all(client, desc, dest, ret + 1);
if (ret > 0) {
/* Discard the trailing \n */
ret--;
/* Replace it with a \0 just in case */
dest[ret] = '\0';
}
out_unlock:
iio_mutex_unlock(client->lock);
return ret;
}
static ssize_t network_write_dev_attr(const struct iio_device *dev,
const char *attr, const char *src, size_t len, bool is_debug)
{
if (attr && ((is_debug && !iio_device_find_debug_attr(dev, attr)) ||
(!is_debug && !iio_device_find_attr(dev, attr))))
return -ENOENT;
return network_write_attr_helper(dev, NULL, attr, src, len, is_debug);
}
ssize_t iiod_client_write_attr(struct iiod_client *client, int desc,
const struct iio_device *dev, const struct iio_channel *chn,
const char *attr, const char *src, size_t len, bool is_debug)
{
struct iio_context_pdata *pdata = client->pdata;
const struct iiod_client_ops *ops = client->ops;
const char *id = iio_device_get_id(dev);
char buf[1024];
ssize_t ret;
int resp;
if (attr) {
if (chn) {
if (!iio_channel_find_attr(chn, attr))
return -ENOENT;
} else if (is_debug) {
if (!iio_device_find_debug_attr(dev, attr))
return -ENOENT;
} else {
if (!iio_device_find_attr(dev, attr))
return -ENOENT;
}
}
if (chn)
snprintf(buf, sizeof(buf), "WRITE %s %s %s %s %lu\r\n", id,
iio_channel_is_output(chn) ? "OUTPUT" : "INPUT",
iio_channel_get_id(chn), attr ? attr : "",
(unsigned long) len);
else if (is_debug)
snprintf(buf, sizeof(buf), "WRITE %s DEBUG %s %lu\r\n",
id, attr ? attr : "", (unsigned long) len);
else
snprintf(buf, sizeof(buf), "WRITE %s %s %lu\r\n",
id, attr ? attr : "", (unsigned long) len);
iio_mutex_lock(client->lock);
ret = ops->write(pdata, desc, buf, strlen(buf));
if (ret < 0)
goto out_unlock;
ret = iiod_client_write_all(client, desc, src, len);
if (ret < 0)
goto out_unlock;
ret = iiod_client_read_integer(client, desc, &resp);
if (ret < 0)
goto out_unlock;
ret = (ssize_t) resp;
out_unlock:
iio_mutex_unlock(client->lock);
return ret;
}
