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Commit acf50b35 authored by Hartmut Knaack's avatar Hartmut Knaack Committed by Jonathan Cameron
Browse files

tools:iio:lsiio: add error handling 



Add error handling to calls which can indicate a major problem by
returning an error code.
This also involves to change the type of dump_devices() from void to int.

Signed-off-by: default avatarHartmut Knaack <knaack.h@gmx.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 53118557

tools/iio/lsiio.c

+32 −12
Original line number Diff line number Diff line
@@ -69,7 +69,10 @@ static int dump_one_device(const char *dev_dir_name) 
			"%i", &dev_idx);

	if (retval != 1)

		return -EINVAL;

	read_sysfs_string("name", dev_dir_name, name);

	retval = read_sysfs_string("name", dev_dir_name, name);

	if (retval)

		return retval;



	printf("Device %03d: %s\n", dev_idx, name);



	if (verblevel >= VERBLEVEL_SENSORS)
@@ -87,20 +90,24 @@ static int dump_one_trigger(const char *dev_dir_name) 
			"%i", &dev_idx);

	if (retval != 1)

		return -EINVAL;

	read_sysfs_string("name", dev_dir_name, name);

	retval = read_sysfs_string("name", dev_dir_name, name);

	if (retval)

		return retval;



	printf("Trigger %03d: %s\n", dev_idx, name);

	return 0;

}



static void dump_devices(void)

static int dump_devices(void)

{

	const struct dirent *ent;

	int ret;

	DIR *dp;



	dp = opendir(iio_dir);

	if (dp == NULL) {

		printf("No industrial I/O devices available\n");

		return;

		return -ENODEV;

	}



	while (ent = readdir(dp), ent != NULL) {
@@ -109,11 +116,16 @@ static void dump_devices(void) 


			if (asprintf(&dev_dir_name, "%s%s", iio_dir,

				     ent->d_name) < 0) {

				printf("Memory allocation failed\n");

				ret = -ENOMEM;

				goto error_close_dir;

			}



			ret = dump_one_device(dev_dir_name);

			if (ret) {

				free(dev_dir_name);

				goto error_close_dir;

			}



			dump_one_device(dev_dir_name);

			free(dev_dir_name);

			if (verblevel >= VERBLEVEL_SENSORS)

				printf("\n");
@@ -126,16 +138,26 @@ static void dump_devices(void) 


			if (asprintf(&dev_dir_name, "%s%s", iio_dir,

				     ent->d_name) < 0) {

				printf("Memory allocation failed\n");

				ret = -ENOMEM;

				goto error_close_dir;

			}



			ret = dump_one_trigger(dev_dir_name);

			if (ret) {

				free(dev_dir_name);

				goto error_close_dir;

			}



			dump_one_trigger(dev_dir_name);

			free(dev_dir_name);

		}

	}

	return (closedir(dp) == -1) ? -errno : 0;



error_close_dir:

	closedir(dp);

	if (closedir(dp) == -1)

		perror("dump_devices(): Failed to close directory");



	return ret;

}



int main(int argc, char **argv)
@@ -163,7 +185,5 @@ int main(int argc, char **argv) 
		exit(1);

	}



	dump_devices();



	return 0;

	return dump_devices();

}