ash,hush: allow builtins to be tab-completed, closes 7532

function                                             old     new   delta
complete_cmd_dir_file                                678     830    +152
get_builtin_name                                       -      35     +35
optschanged                                          125     132      +7
hush_main                                           1069    1076      +7
save_command_ps_at_cur_history                        76      78      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 203/0)             Total: 203 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 18 insertions, 1 deletions

diff --git a/shell/ash.c b/shell/ash.c
index d6040f47e..fb4028219 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -9523,6 +9523,11 @@ evalpipe(union node *n, int flags)
         return status;
 }
 
+/* setinteractive needs this forward reference */
+#if EDITING_HAS_get_exe_name
+static const char *get_builtin_name(int i) FAST_FUNC;
+#endif
+
 /*
  * Controls whether the shell is interactive or not.
  */
@@ -9554,8 +9559,12 @@ setinteractive(int on)
                 }
 #endif
 #if ENABLE_FEATURE_EDITING
-                if (!line_input_state)
+                if (!line_input_state) {
                         line_input_state = new_line_input_t(FOR_SHELL | WITH_PATH_LOOKUP);
+# if EDITING_HAS_get_exe_name
+                        line_input_state->get_exe_name = get_builtin_name;
+# endif
+                }
 #endif
         }
 }
@@ -10023,6 +10032,14 @@ find_builtin(const char *name)
         return bp;
 }
 
+#if EDITING_HAS_get_exe_name
+static const char * FAST_FUNC
+get_builtin_name(int i)
+{
+        return /*i >= 0 &&*/ i < ARRAY_SIZE(builtintab) ? builtintab[i].name + 1 : NULL;
+}
+#endif
+
 /*
  * Execute a simple command.
  */