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From 0e330ec3662795aea42ac36ecf7a9f32a249c36d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
Date: Tue, 14 Jan 2020 09:05:02 +0100
Subject: blobmsg_json: prefer snprintf usage
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Better safe than sorry and while at it prefer use of PRId16 and PRId32
formatting constants as well.
Reviewed-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
---
blobmsg_json.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/blobmsg_json.c
+++ b/blobmsg_json.c
@@ -203,7 +203,7 @@ static void blobmsg_format_string(struct
buf[1] = escape;
if (escape == 'u') {
- sprintf(buf + 4, "%02x", (unsigned char) *p);
+ snprintf(buf + 4, sizeof(buf) - 4, "%02x", (unsigned char) *p);
len = 6;
} else {
len = 2;
@@ -220,7 +220,7 @@ static void blobmsg_format_json_list(str
static void blobmsg_format_element(struct strbuf *s, struct blob_attr *attr, bool without_name, bool head)
{
const char *data_str;
- char buf[32];
+ char buf[317];
void *data;
int len;
@@ -244,22 +244,22 @@ static void blobmsg_format_element(struc
data_str = buf;
switch(blob_id(attr)) {
case BLOBMSG_TYPE_UNSPEC:
- sprintf(buf, "null");
+ snprintf(buf, sizeof(buf), "null");
break;
case BLOBMSG_TYPE_BOOL:
- sprintf(buf, "%s", *(uint8_t *)data ? "true" : "false");
+ snprintf(buf, sizeof(buf), "%s", *(uint8_t *)data ? "true" : "false");
break;
case BLOBMSG_TYPE_INT16:
- sprintf(buf, "%d", (int16_t) be16_to_cpu(*(uint16_t *)data));
+ snprintf(buf, sizeof(buf), "%" PRId16, (int16_t) be16_to_cpu(*(uint16_t *)data));
break;
case BLOBMSG_TYPE_INT32:
- sprintf(buf, "%d", (int32_t) be32_to_cpu(*(uint32_t *)data));
+ snprintf(buf, sizeof(buf), "%" PRId32, (int32_t) be32_to_cpu(*(uint32_t *)data));
break;
case BLOBMSG_TYPE_INT64:
- sprintf(buf, "%" PRId64, (int64_t) be64_to_cpu(*(uint64_t *)data));
+ snprintf(buf, sizeof(buf), "%" PRId64, (int64_t) be64_to_cpu(*(uint64_t *)data));
break;
case BLOBMSG_TYPE_DOUBLE:
- sprintf(buf, "%lf", blobmsg_get_double(attr));
+ snprintf(buf, sizeof(buf), "%lf", blobmsg_get_double(attr));
break;
case BLOBMSG_TYPE_STRING:
blobmsg_format_string(s, data);
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