On 2/24/2021 10:38 PM, Guo, Yejun wrote:
Here is the warning message:
src/libavdevice/v4l2.c: In function ‘v4l2_get_device_list’:
src/libavdevice/v4l2.c:1054:58: warning: ‘%s’ directive output may be truncated
writing up to 255 bytes into a region of size 251 [-Wformat-truncation=]
snprintf(device_name, sizeof(device_name), "/dev/%s", entry->d_name);
^~
src/libavdevice/v4l2.c:1054:9: note: ‘snprintf’ output between 6 and 261 bytes
into a destination of size 256
snprintf(device_name, sizeof(device_name), "/dev/%s", entry->d_name);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Guo, Yejun <yejun....@intel.com>
---
libavdevice/v4l2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 365bacd771..e11d10d20e 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -1046,7 +1046,7 @@ static int v4l2_get_device_list(AVFormatContext *ctx,
AVDeviceInfoList *device_l
return ret;
}
while ((entry = readdir(dir))) {
- char device_name[256];
+ char device_name[512];
Is there a portable path max constant that would be better for cases
like this, rather than just picking another arbitrary buffer size?
if (!v4l2_is_v4l_dev(entry->d_name))
continue;
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