From: Glenn L McGrath <bug1@ihug.co.nz>
Date: Thu, 20 Nov 2003 09:53:31 +0000 (-0000)
Subject: Check at least one context is specified
X-Git-Tag: 1_00_pre4~34
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=bebc40b4066384288a5db13884162e1e67789d4b;p=oweals%2Fbusybox.git

Check at least one context is specified
---

diff --git a/archival/tar.c b/archival/tar.c
index 9ef616b92..c8a2bd385 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -662,6 +662,9 @@ int tar_main(int argc, char **argv)
 	if(opt & 0x80000000UL)
 		bb_show_usage();
 	ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
+	if (ctx_flag == 0) {
+		bb_show_usage();
+	}
 	if(ctx_flag & CTX_TEST) {
 		if ((tar_handle->action_header == header_list) || 
 			(tar_handle->action_header == header_verbose_list)) {