Import rbenv changes at 7e0e85bdda

src/bash.h

@@ -0,0 +1,31 @@
+#ifndef __BASH_H__
+#define __BASH_H__
+
+#define EXECUTION_SUCCESS 0
+#define EXECUTION_FAILURE 1
+#define EX_USAGE 258
+
+#define BUILTIN_ENABLED 1
+
+typedef struct word_desc {
+  char *word;
+  int flags;
+} WORD_DESC;
+
+typedef struct word_list {
+  struct word_list *next;
+  WORD_DESC *word;
+} WORD_LIST;
+
+typedef int sh_builtin_func_t(WORD_LIST *);
+
+struct builtin {
+  char *name;
+  sh_builtin_func_t *function;
+  int flags;
+  char * const *long_doc;
+  const char *short_doc;
+  char *unused;
+};
+
+#endif