/*- * 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. * 4. 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. * * @(#)parser.h 8.3 (Berkeley) 5/4/95 * $FreeBSD$ */ /* control characters in argument strings */ #define CTLESC '\300' #define CTLVAR '\301' #define CTLENDVAR '\371' #define CTLBACKQ '\372' #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */ /* CTLBACKQ | CTLQUOTE == '\373' */ #define CTLARI '\374' #define CTLENDARI '\375' #define CTLQUOTEMARK '\376' #define CTLQUOTEEND '\377' /* only for ${v+-...} */ /* variable substitution byte (follows CTLVAR) */ #define VSTYPE 0x0f /* type of variable substitution */ #define VSNUL 0x10 /* colon--treat the empty string as unset */ #define VSLINENO 0x20 /* expansion of $LINENO, the line number \ follows immediately */ #define VSQUOTE 0x80 /* inside double quotes--suppress splitting */ /* values of VSTYPE field */ #define VSNORMAL 0x1 /* normal variable: $var or ${var} */ #define VSMINUS 0x2 /* ${var-text} */ #define VSPLUS 0x3 /* ${var+text} */ #define VSQUESTION 0x4 /* ${var?message} */ #define VSASSIGN 0x5 /* ${var=text} */ #define VSTRIMLEFT 0x6 /* ${var#pattern} */ #define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */ #define VSTRIMRIGHT 0x8 /* ${var%pattern} */ #define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */ #define VSLENGTH 0xa /* ${#var} */ #define VSERROR 0xb /* Syntax error, issue when expanded */ /* * NEOF is returned by parsecmd when it encounters an end of file. It * must be distinct from NULL. */ #define NEOF ((union node *)-1) extern int whichprompt; /* 1 == PS1, 2 == PS2 */ extern const char *const parsekwd[]; union node *parsecmd(int); union node *parsewordexp(void); void forcealias(void); void fixredir(union node *, const char *, int); int goodname(const char *); int isassignment(const char *); char *getprompt(void *); const char *expandstr(const char *); |