auto import from //depot/cupcake/@135843
diff --git a/sh/syntax.h b/sh/syntax.h
new file mode 100644
index 0000000..89a32dc
--- /dev/null
+++ b/sh/syntax.h
@@ -0,0 +1,83 @@
+/* $NetBSD: syntax.h,v 1.2 2004/01/17 17:38:12 dsl 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.
+ */
+
+#include <sys/cdefs.h>
+#include <ctype.h>
+
+/* Syntax classes */
+#define CWORD 0 /* character is nothing special */
+#define CNL 1 /* newline character */
+#define CBACK 2 /* a backslash character */
+#define CSQUOTE 3 /* single quote */
+#define CDQUOTE 4 /* double quote */
+#define CBQUOTE 5 /* backwards single quote */
+#define CVAR 6 /* a dollar sign */
+#define CENDVAR 7 /* a '}' character */
+#define CLP 8 /* a left paren in arithmetic */
+#define CRP 9 /* a right paren in arithmetic */
+#define CEOF 10 /* end of file */
+#define CCTL 11 /* like CWORD, except it must be escaped */
+#define CSPCL 12 /* these terminate a word */
+
+/* Syntax classes for is_ functions */
+#define ISDIGIT 01 /* a digit */
+#define ISUPPER 02 /* an upper case letter */
+#define ISLOWER 04 /* a lower case letter */
+#define ISUNDER 010 /* an underscore */
+#define ISSPECL 020 /* the name of a special parameter */
+
+#define PEOF (CHAR_MIN - 1)
+#define SYNBASE (-PEOF)
+/* XXX UPEOF is CHAR_MAX, so is a valid 'char' value... */
+#define UPEOF ((char)PEOF)
+
+
+#define BASESYNTAX (basesyntax + SYNBASE)
+#define DQSYNTAX (dqsyntax + SYNBASE)
+#define SQSYNTAX (sqsyntax + SYNBASE)
+#define ARISYNTAX (arisyntax + SYNBASE)
+
+/* These defines assume that the digits are contiguous */
+#define is_digit(c) ((unsigned)((c) - '0') <= 9)
+#define is_alpha(c) (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && isalpha((unsigned char)(c)))
+#define is_name(c) (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalpha((unsigned char)(c))))
+#define is_in_name(c) (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalnum((unsigned char)(c))))
+#define is_special(c) ((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
+#define digit_val(c) ((c) - '0')
+
+extern const char basesyntax[];
+extern const char dqsyntax[];
+extern const char sqsyntax[];
+extern const char arisyntax[];
+extern const char is_type[];