linux-kernel - [PATCH] tools/counter: close fd when exit

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Message-Id: <20240903080121.5294-1-zhangjiao2@cmss.chinamobile.com>
Date: Tue,  3 Sep 2024 16:01:21 +0800
From: zhangjiao2 <zhangjiao2@...s.chinamobile.com>
To: wbg@...nel.org
Cc: linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	zhang jiao <zhangjiao2@...s.chinamobile.com>
Subject: [PATCH] tools/counter: close fd when exit

From: zhang jiao <zhangjiao2@...s.chinamobile.com>

close fd when exit the program

Signed-off-by: zhang jiao <zhangjiao2@...s.chinamobile.com>
---
 tools/counter/counter_example.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/counter/counter_example.c b/tools/counter/counter_example.c
index be55287b950f..37569208c235 100644
--- a/tools/counter/counter_example.c
+++ b/tools/counter/counter_example.c
@@ -57,12 +57,14 @@ int main(void)
 		if (ret == -1) {
 			fprintf(stderr, "Error adding watches[%d]: %s\n", i,
 				strerror(errno));
+			close(fd);
 			return 1;
 		}
 	}
 	ret = ioctl(fd, COUNTER_ENABLE_EVENTS_IOCTL);
 	if (ret == -1) {
 		perror("Error enabling events");
+		close(fd);
 		return 1;
 	}
 
@@ -70,11 +72,13 @@ int main(void)
 		ret = read(fd, event_data, sizeof(event_data));
 		if (ret == -1) {
 			perror("Failed to read event data");
+			close(fd);
 			return 1;
 		}
 
 		if (ret != sizeof(event_data)) {
 			fprintf(stderr, "Failed to read event data\n");
+			close(fd);
 			return -EIO;
 		}
 
@@ -88,5 +92,6 @@ int main(void)
 		       strerror(event_data[1].status));
 	}
 
+	close(fd);
 	return 0;
 }
-- 
2.33.0