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Commit 55dda0ab authored by Martin Kelly's avatar Martin Kelly Committed by Jonathan Cameron
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tools: iio: iio_generic_buffer: allow continuous looping 



Sometimes it's useful to stream samples forever, such as when
stress-testing a driver overnight to check for memory leaks or other
issues. When the program receives a signal, it will gracefully cleanup,
so it is still safe to terminate at any time.

Add support for specifying a negative -c option, meaning that we should
loop forever. To do so, we need to use a long long (instead of just
long) for num_loops so that current code specifying num_loops greater
than UNSIGNED_LONG_MAX doesn't break.

Signed-off-by: default avatarMartin Kelly <mkelly@xevo.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 71b52d2c

tools/iio/iio_generic_buffer.c

+5 −5
Original line number Diff line number Diff line
@@ -248,7 +248,7 @@ void print_usage(void) 
		"Capture, convert and output data from IIO device buffer\n"

		"  -a         Auto-activate all available channels\n"

		"  -A         Force-activate ALL channels\n"

		"  -c <n>     Do n conversions\n"

		"  -c <n>     Do n conversions, or loop forever if n < 0\n"

		"  -e         Disable wait for event (new data)\n"

		"  -g         Use trigger-less mode\n"

		"  -l <n>     Set buffer length to n samples\n"
@@ -330,12 +330,12 @@ static const struct option longopts[] = { 


int main(int argc, char **argv)

{

	unsigned long num_loops = 2;

	unsigned long long num_loops = 2;

	unsigned long timedelay = 1000000;

	unsigned long buf_len = 128;



	ssize_t i;

	unsigned long j;

	unsigned long long j;

	unsigned long toread;

	int ret, c;

	int fp = -1;
@@ -369,7 +369,7 @@ int main(int argc, char **argv) 
			break;	

		case 'c':

			errno = 0;

			num_loops = strtoul(optarg, &dummy, 10);

			num_loops = strtoll(optarg, &dummy, 10);

			if (errno) {

				ret = -errno;

				goto error;
@@ -637,7 +637,7 @@ int main(int argc, char **argv) 
		goto error;

	}



	for (j = 0; j < num_loops; j++) {

	for (j = 0; j < num_loops || num_loops < 0; j++) {

		if (!noevents) {

			struct pollfd pfd = {

				.fd = fp,