libblkid: add error checking for rename() while saving the blkid cache

Addresses-Coverity-Id: #1049141

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

diff --git a/lib/blkid/save.c b/lib/blkid/save.c
index c55e043..a6538db 100644 (file)
--- a/lib/blkid/save.c
+++ b/lib/blkid/save.c
@@ -136,7 +136,7 @@ int blkid_flush_cache(blkid_cache cache)
        fclose(file);
        if (opened != filename) {
                if (ret < 0) {
-                       unlink(opened);
+                       (void) unlink(opened);
                        DBG(DEBUG_SAVE,
                            printf("unlinked temp cache %s\n", opened));
                } else {
@@ -149,7 +149,8 @@ int blkid_flush_cache(blkid_cache cache)
                                link(filename, backup);
                                free(backup);
                        }
-                       rename(opened, filename);
+                       if (rename(opened, filename) < 0)
+                               (void) unlink(opened);
                        DBG(DEBUG_SAVE,
                            printf("moved temp cache %s\n", opened));
                }