badblocks: print warning if set_o_direct() fails

Addresses-Coverity-Id: #1049148

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/misc/badblocks.c b/misc/badblocks.c
index 912ef28633c7b55e409624cf54917c2ca26c0d32..e5024f6c67d131d4dfe35251f65ef7eedaed4f7d 100644 (file)
--- a/misc/badblocks.c
+++ b/misc/badblocks.c
@@ -300,7 +300,8 @@ static void set_o_direct(int dev, unsigned char *buffer, size_t size,
                flag = fcntl(dev, F_GETFL);
                if (flag > 0) {
                        flag = (flag & ~O_DIRECT) | new_flag;
-                       fcntl(dev, F_SETFL, flag);
+                       if (fcntl(dev, F_SETFL, flag) < 0)
+                               perror("set_o_direct");
                }
                current_O_DIRECT = new_flag;
        }