Dont try and preserve hard links to directories.

The linux kernel doesnt allow hard links to directories, SUS says its
implementation specific.
cramfs gives empty directories and 0 length files the same node it
makies it difficult to distinguish from hard links.

1 files changed, 3 insertions, 1 deletions

diff --git a/libbb/copy_file.c b/libbb/copy_file.c
index 7ddb9a23f..68a1ded04 100644
--- a/libbb/copy_file.c
+++ b/libbb/copy_file.c
@@ -242,7 +242,9 @@ int copy_file(const char *source, const char *dest, int flags)
         }
 
 #ifdef CONFIG_FEATURE_PRESERVE_HARDLINKS
-        add_to_ino_dev_hashtable(&source_stat, dest);
+        if (! S_ISDIR(source_stat.st_mode)) {
+                add_to_ino_dev_hashtable(&source_stat, dest);
+        }
 #endif
 
 end: