From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 7 Apr 2026 18:05:23 +0000 (-0700)
Subject: Disallow --one-top-level=''.
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=b4fc9ca13617411c5db57286a3ff534bd40acdc1;p=thirdparty%2Ftar.git

Disallow --one-top-level=''.

* src/tar.c (decode_options): Do not accept an empty string
as a relative file name.
---

diff --git a/src/tar.c b/src/tar.c
index 1ee5ed41..1df9460c 100644
--- a/src/tar.c
+++ b/src/tar.c
@@ -2688,7 +2688,9 @@ decode_options (int argc, char **argv)
 			"please set it explicitly with --one-top-level=DIR"));
 	}
 
-      if (one_top_level_dir && !IS_RELATIVE_FILE_NAME (one_top_level_dir))
+      if (one_top_level_dir
+	  && ! (*one_top_level_dir
+		&& IS_RELATIVE_FILE_NAME (one_top_level_dir)))
 	paxusage(_("--one-top-level=DIR must use a relative file name"));
     }