auto import from //depot/cupcake/@135843
diff --git a/sh/expand.h b/sh/expand.h
new file mode 100644
index 0000000..1ea876d
--- /dev/null
+++ b/sh/expand.h
@@ -0,0 +1,72 @@
+/* $NetBSD: expand.h,v 1.16 2004/07/13 15:05:59 seb Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)expand.h 8.2 (Berkeley) 5/4/95
+ */
+
+struct strlist {
+ struct strlist *next;
+ char *text;
+};
+
+
+struct arglist {
+ struct strlist *list;
+ struct strlist **lastp;
+};
+
+/*
+ * expandarg() flags
+ */
+#define EXP_FULL 0x1 /* perform word splitting & file globbing */
+#define EXP_TILDE 0x2 /* do normal tilde expansion */
+#define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
+#define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
+#define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
+#define EXP_IFS_SPLIT 0x20 /* need to record arguments for ifs breakup */
+
+
+union node;
+void expandhere(union node *, int);
+void expandarg(union node *, struct arglist *, int);
+void expari(int);
+int patmatch(char *, char *, int);
+void rmescapes(char *);
+int casematch(union node *, char *);
+int wordexpcmd(int, char **);
+
+/* From arith.y */
+int arith(const char *);
+int expcmd(int , char **);
+void arith_lex_reset(void);
+int yylex(void);