--- ../busybox-1.25.1.orig/archival/libarchive/data_extract_all.c	2016-09-27 19:53:50.000000000 +0300
+++ ./archival/libarchive/data_extract_all.c	2016-11-01 15:26:26.310407121 +0300
@@ -32,7 +32,8 @@
 	/* Hard links are encoded as regular files of size 0
 	 * with a nonempty link field */
 	hard_link = NULL;
-	if (S_ISREG(file_header->mode) && file_header->size == 0)
+	if (S_ISREG(file_header->mode) && file_header->size == 0
+		&& !(archive_handle->ah_flags & ARCHIVE_HARD_DEREFERENCE))
 		hard_link = file_header->link_target;
 
 #if ENABLE_FEATURE_TAR_LONG_OPTIONS
@@ -154,7 +155,16 @@
 			flags,
 			file_header->mode
 			);
-		bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
+		/* Copy file if hardlink */
+		if (file_header->link_target && file_header->size == 0) {
+			int src_fd = xopen3(file_header->link_target,
+				O_RDONLY,
+				file_header->mode
+				);
+			bb_copyfd_eof(src_fd, dst_fd);
+			close(src_fd);
+		} else
+			bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
 		close(dst_fd);
 #ifdef ARCHIVE_REPLACE_VIA_RENAME
 		if (archive_handle->ah_flags & ARCHIVE_REPLACE_VIA_RENAME) {
--- ../busybox-1.29.2/archival/tar.c	2018-07-02 14:23:06.000000000 +0300
+++ ./archival/tar.c	2018-08-13 11:43:18.907744931 +0300
@@ -814,6 +814,7 @@
 //usage:       "$ tar -cf /tmp/tarball.tar /usr/local\n"
 
 // Supported but aren't in --help:
+//	hard-dereference
 //	no-recursion
 //	numeric-owner
 //	no-same-permissions
@@ -835,6 +836,7 @@
 	IF_FEATURE_SEAMLESS_Z(   OPTBIT_COMPRESS    ,)
 	IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
 #if ENABLE_FEATURE_TAR_LONG_OPTIONS
+	OPTBIT_HARD_DEREFERENCE,
 	OPTBIT_STRIP_COMPONENTS,
 	OPTBIT_NORECURSION,
 	IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND   ,)
@@ -861,6 +863,7 @@
 	OPT_XZ           = IF_FEATURE_SEAMLESS_XZ(  (1 << OPTBIT_XZ          )) + 0, // J
 	OPT_COMPRESS     = IF_FEATURE_SEAMLESS_Z(   (1 << OPTBIT_COMPRESS    )) + 0, // Z
 	OPT_NOPRESERVE_TIME  = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
+	OPT_HARD_DEREFERENCE = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_HARD_DEREFERENCE)) + 0, // hard-dereference
 	OPT_STRIP_COMPONENTS = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_STRIP_COMPONENTS)) + 0, // strip-components
 	OPT_NORECURSION      = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NORECURSION    )) + 0, // no-recursion
 	OPT_2COMMAND         = IF_FEATURE_TAR_TO_COMMAND(  (1 << OPTBIT_2COMMAND       )) + 0, // to-command
@@ -911,6 +914,7 @@
 	"touch\0"               No_argument       "m"
 # endif
 	"strip-components\0"	Required_argument "\xf9"
+	"hard-dereference\0"    No_argument   "\xf0"
 	"no-recursion\0"	No_argument       "\xfa"
 # if ENABLE_FEATURE_TAR_TO_COMMAND
 	"to-command\0"		Required_argument "\xfb"
@@ -1108,6 +1112,9 @@
 
 	if (opt & OPT_NOPRESERVE_TIME)
 		tar_handle->ah_flags &= ~ARCHIVE_RESTORE_DATE;
+	
+	if (opt & OPT_HARD_DEREFERENCE)
+		tar_handle->ah_flags |= ARCHIVE_HARD_DEREFERENCE;
 
 #if ENABLE_FEATURE_TAR_FROM
 	tar_handle->reject = append_file_list_to_list(tar_handle->reject);
--- ../busybox-1.25.1.orig/include/bb_archive.h	2016-09-27 19:53:50.000000000 +0300
+++ ./include/bb_archive.h	2016-11-01 15:30:37.086404049 +0300
@@ -129,6 +129,7 @@
 #if ENABLE_RPM
 #define ARCHIVE_REPLACE_VIA_RENAME  (1 << 10)
 #endif
+#define ARCHIVE_HARD_DEREFERENCE    (1 << 11)
 
 
 /* POSIX tar Header Block, from POSIX 1003.1-1990  */