parser.h revision 164003 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)parser.h	8.3 (Berkeley) 5/4/95
33 * $FreeBSD: head/bin/sh/parser.h 164003 2006-11-05 18:36:05Z stefanf $
34 */
35
36/* control characters in argument strings */
37#define CTLESC '\201'
38#define CTLVAR '\202'
39#define CTLENDVAR '\203'
40#define CTLBACKQ '\204'
41#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
42/*	CTLBACKQ | CTLQUOTE == '\205' */
43#define	CTLARI	'\206'
44#define	CTLENDARI '\207'
45#define	CTLQUOTEMARK '\210'
46
47/* variable substitution byte (follows CTLVAR) */
48#define VSTYPE	0x0f		/* type of variable substitution */
49#define VSNUL	0x10		/* colon--treat the empty string as unset */
50#define VSQUOTE 0x80		/* inside double quotes--suppress splitting */
51
52/* values of VSTYPE field */
53#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
54#define VSMINUS		0x2		/* ${var-text} */
55#define VSPLUS		0x3		/* ${var+text} */
56#define VSQUESTION	0x4		/* ${var?message} */
57#define VSASSIGN	0x5		/* ${var=text} */
58#define VSTRIMLEFT	0x6		/* ${var#pattern} */
59#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
60#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
61#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
62#define VSLENGTH	0xa		/* ${#var} */
63#define VSERROR		0xb		/* Syntax error, issue when expanded */
64
65
66/*
67 * NEOF is returned by parsecmd when it encounters an end of file.  It
68 * must be distinct from NULL, so we use the address of a variable that
69 * happens to be handy.
70 */
71extern int tokpushback;
72#define NEOF ((union node *)&tokpushback)
73extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
74
75
76union node *parsecmd(int);
77void fixredir(union node *, const char *, int);
78int goodname(char *);
79char *getprompt(void *);
80