bin/sh/parser.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Kenneth Almquist.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)parser.h    8.3 (Berkeley) 5/4/95
  35  * $FreeBSD: head/bin/sh/parser.h 326025 2017-11-20 19:49:47Z pfg $
  36  */
  37
  38 /* control characters in argument strings */
  39 #define CTLESC '\300'
  40 #define CTLVAR '\301'
  41 #define CTLENDVAR '\371'
  42 #define CTLBACKQ '\372'
  43 #define CTLQUOTE 01             /* ored with CTLBACKQ code if in quotes */
  44 /*      CTLBACKQ | CTLQUOTE == '\373' */
  45 #define CTLARI  '\374'
  46 #define CTLENDARI '\375'
  47 #define CTLQUOTEMARK '\376'
  48 #define CTLQUOTEEND '\377' /* only for ${v+-...} */
  49
  50 /* variable substitution byte (follows CTLVAR) */
  51 #define VSTYPE          0x0f    /* type of variable substitution */
  52 #define VSNUL           0x10    /* colon--treat the empty string as unset */
  53 #define VSLINENO        0x20    /* expansion of $LINENO, the line number \
  54                                    follows immediately */
  55 #define VSQUOTE         0x80    /* inside double quotes--suppress splitting */
  56
  57 /* values of VSTYPE field */
  58 #define VSNORMAL        0x1             /* normal variable:  $var or ${var} */
  59 #define VSMINUS         0x2             /* ${var-text} */
  60 #define VSPLUS          0x3             /* ${var+text} */
  61 #define VSQUESTION      0x4             /* ${var?message} */
  62 #define VSASSIGN        0x5             /* ${var=text} */
  63 #define VSTRIMLEFT      0x6             /* ${var#pattern} */
  64 #define VSTRIMLEFTMAX   0x7             /* ${var##pattern} */
  65 #define VSTRIMRIGHT     0x8             /* ${var%pattern} */
  66 #define VSTRIMRIGHTMAX  0x9             /* ${var%%pattern} */
  67 #define VSLENGTH        0xa             /* ${#var} */
  68 #define VSERROR         0xb             /* Syntax error, issue when expanded */
  69
  70
  71 /*
  72  * NEOF is returned by parsecmd when it encounters an end of file.  It
  73  * must be distinct from NULL.
  74  */
  75 #define NEOF ((union node *)-1)
  76 extern int whichprompt;         /* 1 == PS1, 2 == PS2 */
  77 extern const char *const parsekwd[];
  78
  79
  80 union node *parsecmd(int);
  81 union node *parsewordexp(void);
  82 void forcealias(void);
  83 void fixredir(union node *, const char *, int);
  84 int goodname(const char *);
  85 int isassignment(const char *);
  86 char *getprompt(void *);
  87 const char *expandstr(const char *);