tests: Print context creation messages to stderr

pcercuei · pcercuei · commit 8f53a94ccee1 · 2021-04-09T13:18:47.000+02:00
When using iio_readdev, stdout is reserved for the data output; so information messages about the context creation must be sent to stderr so that the data stream is not polluted. Fixes #583. Signed-off-by: Paul Cercueil <paul@crapouillou.net>
diff --git a/tests/iio_common.c b/tests/iio_common.c
@@ -95,11 +95,11 @@ struct iio_context * autodetect_context(bool rtn, const char * name, const char
 	}
 
 	if (ret == 0) {
-		printf("No IIO context found.\n");
+		fprintf(stderr, "No IIO context found.\n");
 		goto err_free_info_list;
 	}
 	if (rtn && ret == 1) {
-		printf("Using auto-detected IIO context at URI \"%s\"\n",
+		fprintf(stderr, "Using auto-detected IIO context at URI \"%s\"\n",
 		iio_context_info_get_uri(info[0]));
 		ctx = iio_create_context_from_uri(iio_context_info_get_uri(info[0]));
 	} else {

Original file line number	Diff line number	Diff line change
`@@ -95,11 +95,11 @@ struct iio_context * autodetect_context(bool rtn, const char * name, const char`
`95`	`95`	`}`
`96`	`96`
`97`	`97`	`if (ret == 0) {`
`98`		`- printf("No IIO context found.\n");`
	`98`	`+ fprintf(stderr, "No IIO context found.\n");`
`99`	`99`	`goto err_free_info_list;`
`100`	`100`	`}`
`101`	`101`	`if (rtn && ret == 1) {`
`102`		`- printf("Using auto-detected IIO context at URI \"%s\"\n",`
	`102`	`+ fprintf(stderr, "Using auto-detected IIO context at URI \"%s\"\n",`
`103`	`103`	`iio_context_info_get_uri(info[0]));`
`104`	`104`	`ctx = iio_create_context_from_uri(iio_context_info_get_uri(info[0]));`
`105`	`105`	`} else {`