parser.h revision 289938 
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: stable/10/bin/sh/parser.h 289938 2015-10-25 17:17:50Z jilles $
34 */
35
36/* control characters in argument strings */
37#define CTLESC '\300'
38#define CTLVAR '\301'
39#define CTLENDVAR '\371'
40#define CTLBACKQ '\372'
41#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
42/*	CTLBACKQ | CTLQUOTE == '\373' */
43#define	CTLARI	'\374'
44#define	CTLENDARI '\375'
45#define	CTLQUOTEMARK '\376'
46#define	CTLQUOTEEND '\377' /* only for ${v+-...} */
47
48/* variable substitution byte (follows CTLVAR) */
49#define VSTYPE		0x0f	/* type of variable substitution */
50#define VSNUL		0x10	/* colon--treat the empty string as unset */
51#define VSLINENO	0x20	/* expansion of $LINENO, the line number \
52				   follows immediately */
53#define VSQUOTE		0x80	/* inside double quotes--suppress splitting */
54
55/* values of VSTYPE field */
56#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
57#define VSMINUS		0x2		/* ${var-text} */
58#define VSPLUS		0x3		/* ${var+text} */
59#define VSQUESTION	0x4		/* ${var?message} */
60#define VSASSIGN	0x5		/* ${var=text} */
61#define VSTRIMLEFT	0x6		/* ${var#pattern} */
62#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
63#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
64#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
65#define VSLENGTH	0xa		/* ${#var} */
66#define VSERROR		0xb		/* Syntax error, issue when expanded */
67
68
69/*
70 * NEOF is returned by parsecmd when it encounters an end of file.  It
71 * must be distinct from NULL.
72 */
73#define NEOF ((union node *)-1)
74extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
75extern const char *const parsekwd[];
76
77
78union node *parsecmd(int);
79union node *parsewordexp(void);
80void forcealias(void);
81void fixredir(union node *, const char *, int);
82int goodname(const char *);
83int isassignment(const char *);
84char *getprompt(void *);
85const char *expandstr(const char *);
86