libf2fs: avoid build warning
This avoids the below warnings.
libf2fs_zoned.c:39:8: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result]
fscanf(file, "%s", str);
^
libf2fs_zoned.c: In function 'f2fs_get_zone_blocks':
libf2fs_zoned.c:72:8: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result]
fscanf(file, "%s", str);
^
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/lib/libf2fs_zoned.c b/lib/libf2fs_zoned.c
index 4ef4f1d..93b48f1 100644
--- a/lib/libf2fs_zoned.c
+++ b/lib/libf2fs_zoned.c
@@ -26,6 +26,7 @@
{
char str[128];
FILE *file;
+ int res;
/* Check that this is a zoned block device */
snprintf(str, sizeof(str),
@@ -36,9 +37,12 @@
goto not_zoned;
memset(str, 0, sizeof(str));
- fscanf(file, "%s", str);
+ res = fscanf(file, "%s", str);
fclose(file);
+ if (res != 1)
+ goto not_zoned;
+
if (strcmp(str, "host-aware") == 0) {
c.zoned_model = F2FS_ZONED_HA;
return;
@@ -57,6 +61,7 @@
uint64_t sectors;
char str[128];
FILE *file;
+ int res;
/* Get zone size */
c.zone_blocks = 0;
@@ -69,9 +74,12 @@
return -1;
memset(str, 0, sizeof(str));
- fscanf(file, "%s", str);
+ res = fscanf(file, "%s", str);
fclose(file);
+ if (res != 1)
+ return -1;
+
sectors = atol(str);
if (!sectors)
return -1;
