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 179022 2008-05-15 19:55:27Z 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 VSLINENO 0x20 /* expansion of $LINENO, the line number \
51 follows immediately */
52#define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
53
54/* values of VSTYPE field */
55#define VSNORMAL 0x1 /* normal variable: $var or ${var} */
56#define VSMINUS 0x2 /* ${var-text} */
57#define VSPLUS 0x3 /* ${var+text} */
58#define VSQUESTION 0x4 /* ${var?message} */
59#define VSASSIGN 0x5 /* ${var=text} */
60#define VSTRIMLEFT 0x6 /* ${var#pattern} */
61#define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */
62#define VSTRIMRIGHT 0x8 /* ${var%pattern} */
63#define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */
64#define VSLENGTH 0xa /* ${#var} */
65#define VSERROR 0xb /* Syntax error, issue when expanded */
66
67
68/*
69 * NEOF is returned by parsecmd when it encounters an end of file. It
70 * must be distinct from NULL, so we use the address of a variable that
71 * happens to be handy.
72 */
73extern int tokpushback;
74#define NEOF ((union node *)&tokpushback)
75extern int whichprompt; /* 1 == PS1, 2 == PS2 */
76
77
78union node *parsecmd(int);
79void fixredir(union node *, const char *, int);
80int goodname(char *);
81char *getprompt(void *);