libarchive: allow extraction of hard links

Allow create_or_remember_link() to create hardlinks.

As a result tar and cpio can now extract hard links.  Since unzip
only supports symlinks it sees no improvement.  As before, attempts
to extract symlinks result in a warning.

1 files changed, 7 insertions, 3 deletions

diff --git a/archival/libarchive/unsafe_symlink_target.c b/archival/libarchive/unsafe_symlink_target.c
index ff96991f5..b5f5a2670 100644
--- a/archival/libarchive/unsafe_symlink_target.c
+++ b/archival/libarchive/unsafe_symlink_target.c
@@ -24,12 +24,17 @@ void FAST_FUNC create_or_remember_link(llist_t **link_placeholders,
                 );
         }
 #else
+        if (hard_link) {
+                llist_add_to_end(link_placeholders,
+                        xasprintf("%c%s%c%s", hard_link, linkname, '\0', target)
+                );
+                return;
+        }
         /* symlink isn't implemented for WIN32, just issue a warning */
-        bb_perror_msg("can't create %slink '%s' to '%s'", "sym", linkname, target);
+        bb_perror_msg("can't create symlink '%s' to '%s'", linkname, target);
 #endif
 }
 
-#if !ENABLE_PLATFORM_MINGW32
 void FAST_FUNC create_links_from_list(llist_t *list)
 {
         while (list) {
@@ -46,4 +51,3 @@ void FAST_FUNC create_links_from_list(llist_t *list)
                 list = list->link;
         }
 }
-#endif