ar: Don't crash when given files but no command.

2 files changed, 9 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 46c277ce..98c32421 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,7 @@
 2012-01-20  Roland McGrath  <roland@hack.frob.com>
 
+	* ar.c (main): Handle oper_none as usage error.
+
 	* arlib-argp.c (options, parse_opt): Grok -U as inverse of -D.
 
 	* ranlib.c (argp): Use arlib_argp_children.
diff --git a/src/ar.c b/src/ar.c
index 72b0237f..147d9f2b 100644
--- a/src/ar.c
+++ b/src/ar.c
@@ -252,6 +252,13 @@ MEMBER parameter required for 'a', 'b', and 'i' modifiers"));
   int status;
   switch (operation)
     {
+    case oper_none:
+      error (0, 0, gettext ("command option required"));
+      argp_help (&argp, stderr, ARGP_HELP_STD_ERR,
+                 program_invocation_short_name);
+      status = 1;
+      break;
+
     case oper_list:
     case oper_print:
       status = do_oper_extract (operation, arfname, argv, argc, -1);