parser.h revision 38887
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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)parser.h 8.3 (Berkeley) 5/4/95 37 * $Id: parser.h,v 1.6 1997/02/22 13:58:42 peter Exp $ 38 */ 39 40/* control characters in argument strings */ 41#define CTLESC '\201' 42#define CTLVAR '\202' 43#define CTLENDVAR '\203' 44#define CTLBACKQ '\204' 45#define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */ 46/* CTLBACKQ | CTLQUOTE == '\205' */ 47#define CTLARI '\206' 48#define CTLENDARI '\207' 49#define CTLQUOTEMARK '\210' 50 51/* variable substitution byte (follows CTLVAR) */ 52#define VSTYPE 0x0f /* type of variable substitution */ 53#define VSNUL 0x10 /* colon--treat the empty string as unset */ 54#define VSQUOTE 0x80 /* inside double quotes--suppress splitting */ 55 56/* values of VSTYPE field */ 57#define VSNORMAL 0x1 /* normal variable: $var or ${var} */ 58#define VSMINUS 0x2 /* ${var-text} */ 59#define VSPLUS 0x3 /* ${var+text} */ 60#define VSQUESTION 0x4 /* ${var?message} */ 61#define VSASSIGN 0x5 /* ${var=text} */ 62#define VSTRIMLEFT 0x6 /* ${var#pattern} */ 63#define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */ 64#define VSTRIMRIGHT 0x8 /* ${var%pattern} */ 65#define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */ 66#define VSLENGTH 0xa /* ${#var} */ 67 68 69/* 70 * NEOF is returned by parsecmd when it encounters an end of file. It 71 * must be distinct from NULL, so we use the address of a variable that 72 * happens to be handy. 73 */ 74extern int tokpushback; 75#define NEOF ((union node *)&tokpushback) 76extern int whichprompt; /* 1 == PS1, 2 == PS2 */ 77 78 79union node *parsecmd __P((int)); 80void fixredir __P((union node *, const char *, int)); 81int goodname __P((char *)); 82char *getprompt __P((void *)); 83