linux-kernel - Re: [PATCH] test_power: add missing newlines when printing parameters by sysfs

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Message-ID: <1g3ecQ7VLlrgKOSHr6teWgw9xcmVVQx1bFp2KpJD7y35lZpaC8ONb-jrPKapmFttEwVg2uhDwmv6mug9z5-GVZbqPbkOjcqjrSHtaW-k6ts=@protonmail.com>
Date:   Mon, 05 Oct 2020 01:30:25 +0000
From:   "Harley A.W. Lorenzo" <hl1998@...tonmail.com>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "wangxiongfeng2@...wei.com" <wangxiongfeng2@...wei.com>,
        "joe@...ches.com" <joe@...ches.com>
Subject: Re: [PATCH] test_power: add missing newlines when printing parameters by sysfs

Here is the updated patch using sprintf, diffing from the original patch by Xiongfeng Wang.

[PATCH] test_power: revise parameter printing to use sprintf

Signed-off-by: Harley A.W. Lorenzo <hl1998@...tonmail.com>
Suggested-by: Joe Perches <joe@...ches.com>
---
 drivers/power/supply/test_power.c | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/power/supply/test_power.c b/drivers/power/supply/test_power.c
index 4895ee5e63a9..fbb179a1b615 100644
--- a/drivers/power/supply/test_power.c
+++ b/drivers/power/supply/test_power.c
@@ -352,8 +352,8 @@ static int param_set_ac_online(const char *key, const struct kernel_param *kp)

 static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
 {
-	strcpy(buffer, map_get_key(map_ac_online, ac_online, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, ac_online, "unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

@@ -366,8 +366,8 @@ static int param_set_usb_online(const char *key, const struct kernel_param *kp)

 static int param_get_usb_online(char *buffer, const struct kernel_param *kp)
 {
-	strcpy(buffer, map_get_key(map_ac_online, usb_online, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, usb_online, "unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

@@ -381,8 +381,8 @@ static int param_set_battery_status(const char *key,

 static int param_get_battery_status(char *buffer, const struct kernel_param *kp)
 {
-	strcpy(buffer, map_get_key(map_status, battery_status, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, battery_status, "unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

@@ -396,8 +396,8 @@ static int param_set_battery_health(const char *key,

 static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
 {
-	strcpy(buffer, map_get_key(map_health, battery_health, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, battery_health, "unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

@@ -412,8 +412,9 @@ static int param_set_battery_present(const char *key,
 static int param_get_battery_present(char *buffer,
 					const struct kernel_param *kp)
 {
-	strcpy(buffer, map_get_key(map_present, battery_present, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, battery_present,
+					"unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

@@ -429,9 +430,9 @@ static int param_set_battery_technology(const char *key,
 static int param_get_battery_technology(char *buffer,
 					const struct kernel_param *kp)
 {
-	strcpy(buffer,
-		map_get_key(map_technology, battery_technology, "unknown"));
-	strcat(buffer, "\n");
+	char const *out = map_get_key(map_ac_online, battery_technology,
+					"unknown");
+	sprintf(buffer, "%s\n", out);
 	return strlen(buffer);
 }

--
2.28.0