1 files changed, 6 insertions, 0 deletions

diff --git a/coreutils/install.c b/coreutils/install.c
index 3128c5bd9..84e60f934 100644
--- a/coreutils/install.c
+++ b/coreutils/install.c
@@ -54,8 +54,14 @@ extern int install_main(int argc, char **argv)
         int i;
 
         /* -c exists for backwards compatability, its needed */
+        bb_opt_complementaly = "s~d:d~s";
         flags = bb_getopt_ulflags(argc, argv, "cdpsg:m:o:", &gid_str, &mode_str, &uid_str);     /* 'a' must be 2nd */
 
+        /* Check valid options were given */
+        if(flags & 0x80000000UL) {
+                bb_show_usage();
+        }
+
         /* preserve access and modification time, this is GNU behaviour, BSD only preserves modification time */
         if (flags & INSTALL_OPT_PRESERVE_TIME) {
                 copy_flags |= FILEUTILS_PRESERVE_STATUS;