hush: add support for special vars in braces

Some people like to use ${?} rather than $?, so make sure we support all
the special single char vars that use this form.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 7d0416796..b5cf86132 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -5303,6 +5303,9 @@ static int handle_dollar(o_string *as_string,
                                         all_digits = true;
                                         goto char_ok;
                                 }
+                                /* They're being verbose and doing ${?} */
+                                if (i_peek(input) == '}' && strchr("$!?#*@_", ch))
+                                        goto char_ok;
                         }
 
                         if (expansion < 2