linux-kernel - [PATCH 2/4] tools: iio: Send usage error messages to stderr

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Message-ID: <2ba92e634cbfa3d65ba668320460e71e8986756f.1436220932.git.cristina.opriceana@gmail.com>
Date:	Tue, 7 Jul 2015 01:50:26 +0300
From:	Cristina Opriceana <cristina.opriceana@...il.com>
To:	jic23@...nel.org
Cc:	knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	daniel.baluta@...el.com, octavian.purdila@...el.com,
	julia.lawall@...6.fr
Subject: [PATCH 2/4] tools: iio: Send usage error messages to stderr

Incorrect usage messages should be sent to stderr.

Signed-off-by: Cristina Opriceana <cristina.opriceana@...il.com>
---
 tools/iio/generic_buffer.c    | 2 +-
 tools/iio/iio_event_monitor.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index 2f4e12f..af350cc 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -193,7 +193,7 @@ void process_scan(char *data,
 
 void print_usage(void)
 {
-	printf("Usage: generic_buffer [options]...\n"
+	fprintf(stderr, "Usage: generic_buffer [options]...\n"
 	       "Capture, convert and output data from IIO device buffer\n"
 	       "  -c <n>     Do n conversions\n"
 	       "  -e         Disable wait for event (new data)\n"
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index 843bc4c..1c138fc 100644
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -251,7 +251,7 @@ int main(int argc, char **argv)
 	int fd, event_fd;
 
 	if (argc <= 1) {
-		printf("Usage: %s <device_name>\n", argv[0]);
+		fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
 		return -1;
 	}
 
-- 
1.9.1

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