fix gcc format security error.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/block.c b/block.c
index 4c8dda92fefac06d2a515564bb8ed5c4f67536b3..c6d1b9049145a453205372b93016572b4c332d4a 100644 (file)
--- a/block.c
+++ b/block.c
@@ -1311,7 +1311,7 @@ static int main_swapon(int argc, char **argv)
                                return -1;
                        }
                        while (getline(&lineptr, &s, fp) > 0)
-                               printf(lineptr);
+                               printf("%s", lineptr);
                        if (lineptr)
                                free(lineptr);
                        fclose(fp);