Add extra environment variable

debian/changelog

+tar (1.32+dfsg-1atlas1) unstable; urgency=medium
+
+  * Enrich environment variables when using --to-command with
+    TAR_CUR_BLOCK indicating where in the tarball this object is.
+
+ -- Carsten Aulbert <carsten.aulbert@aei.mpg.de>  Wed, 20 Jan 2021 15:54:40 +0100
+
 tar (1.32+dfsg-1) unstable; urgency=medium
 
   * New upstream version; closes: #892273

debian/patches/add-current-block-to-env.diff

+--- tar-1.32+dfsg.orig/src/system.c
++++ tar-1.32+dfsg/src/system.c
+@@ -677,6 +677,9 @@ chr_to_env (char const *envar, char c)
+ static void
+ stat_to_env (char *name, char type, struct tar_stat_info *st)
+ {
++  char buf[UINTMAX_STRSIZE_BOUND];
++
++  str_to_env ("TAR_CUR_BLOCK", STRINGIFY_BIGINT (current_block_ordinal (), buf));
+   str_to_env ("TAR_VERSION", PACKAGE_VERSION);
+   str_to_env ("TAR_ARCHIVE", *archive_name_cursor);
+   dec_to_env ("TAR_VOLUME", archive_name_cursor - archive_name_array + 1);

debian/patches/series

@@ -3,3 +3,4 @@ pristine-tar.diff
 listed03-linux-only
 oldgnu-unknown-mode-bits.patch
 proper_it_translation.patch
+add-current-block-to-env.diff