1 files changed, 7 insertions, 2 deletions

diff --git a/archival/rpm.c b/archival/rpm.c
index d83c33137..c2f0550ff 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -330,7 +330,7 @@ static void extract_cpio(int fd, const char *source_rpm)
         archive_handle->src_fd = fd;
         /*archive_handle->offset = 0; - init_handle() did it */
 
-        setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_compressed:*/ 1);
+        setup_unzip_on_fd(archive_handle->src_fd, /*die_if_not_compressed:*/ 1);
         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
                 continue;
 }
@@ -549,6 +549,7 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
         //      /* We need to know whether child (gzip/bzip/etc) exits abnormally */
         //      signal(SIGCHLD, check_errors_in_children);
 
+        str = NULL;
         if (ENABLE_FEATURE_SEAMLESS_LZMA
          && (str = rpm_getstr0(TAG_PAYLOADCOMPRESSOR)) != NULL
          && strcmp(str, "lzma") == 0
@@ -557,7 +558,11 @@ int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
                 // set up decompressor without detection
                 setup_lzma_on_fd(rpm_fd);
         } else {
-                setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
+                int signature_bytes = setup_unzip_on_fd(rpm_fd, /*die_if_not_compressed:*/ 0);
+                if (signature_bytes != 0) {
+                        xlseek(rpm_fd, - signature_bytes, SEEK_CUR);
+                        bb_error_msg("warning, unknown compression '%s'", str);
+                }
         }
 
         if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)