apply post 1.7.0 patches, set version to 1.7.11_7_1

1 files changed, 8 insertions, 1 deletions

diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index 85070d978..a99061411 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -8,19 +8,26 @@
 
 char get_header_tar_gz(archive_handle_t *archive_handle)
 {
+#if BB_MMU
         unsigned char magic[2];
+#endif
 
         /* Can't lseek over pipes */
         archive_handle->seek = seek_by_read;
 
+        /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
+         * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
+         * need the header. */
+#if BB_MMU
         xread(archive_handle->src_fd, &magic, 2);
         if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
                 bb_error_msg_and_die("invalid gzip magic");
         }
 
         check_header_gzip_or_die(archive_handle->src_fd);
+#endif
 
-        archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream);
+        archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
         archive_handle->offset = 0;
         while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;