nodetypes revision 1.3
1#!/bin/sh - 2# 3# Copyright (c) 1991 The Regents of the University of California. 4# All rights reserved. 5# 6# This code is derived from software contributed to Berkeley by 7# Kenneth Almquist. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 3. All advertising materials mentioning features or use of this software 18# must display the following acknowledgement: 19# This product includes software developed by the University of 20# California, Berkeley and its contributors. 21# 4. Neither the name of the University nor the names of its contributors 22# may be used to endorse or promote products derived from this software 23# without specific prior written permission. 24# 25# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35# SUCH DAMAGE. 36# 37# @(#)nodetypes 5.1 (Berkeley) 3/7/91 38# 39# $Header: /tank/opengrok/rsync2/NetBSD/src/bin/sh/nodetypes,v 1.3 1993/03/23 00:28:58 cgd Exp $ 40 41# This file describes the nodes used in parse trees. Unindented lines 42# contain a node type followed by a structure tag. Subsequent indented 43# lines specify the fields of the structure. Several node types can share 44# the same structure, in which case the fields of the structure should be 45# specified only once. 46# 47# A field of a structure is described by the name of the field followed 48# by a type. The currently implemented types are: 49# nodeptr - a pointer to a node 50# nodelist - a pointer to a list of nodes 51# string - a pointer to a nul terminated string 52# int - an integer 53# other - any type that can be copied by assignment 54# temp - a field that doesn't have to be copied when the node is copied 55# The last two types should be followed by the text of a C declaration for 56# the field. 57 58NSEMI nbinary # two commands separated by a semicolon 59 type int 60 ch1 nodeptr # the first child 61 ch2 nodeptr # the second child 62 63NCMD ncmd # a simple command 64 type int 65 backgnd int # set to run command in background 66 args nodeptr # the arguments 67 redirect nodeptr # list of file redirections 68 69NPIPE npipe # a pipeline 70 type int 71 backgnd int # set to run pipeline in background 72 cmdlist nodelist # the commands in the pipeline 73 74NREDIR nredir # redirection (of a compex command) 75 type int 76 n nodeptr # the command 77 redirect nodeptr # list of file redirections 78 79NBACKGND nredir # run command in background 80NSUBSHELL nredir # run command in a subshell 81 82NAND nbinary # the && operator 83NOR nbinary # the || operator 84 85NIF nif # the if statement. Elif clauses are handled 86 type int # using multiple if nodes. 87 test nodeptr # if test 88 ifpart nodeptr # then ifpart 89 elsepart nodeptr # else elsepart 90 91NWHILE nbinary # the while statement. First child is the test 92NUNTIL nbinary # the until statement 93 94NFOR nfor # the for statement 95 type int 96 args nodeptr # for var in args 97 body nodeptr # do body; done 98 var string # the for variable 99 100NCASE ncase # a case statement 101 type int 102 expr nodeptr # the word to switch on 103 cases nodeptr # the list of cases (NCLIST nodes) 104 105NCLIST nclist # a case 106 type int 107 next nodeptr # the next case in list 108 pattern nodeptr # list of patterns for this case 109 body nodeptr # code to execute for this case 110 111 112NDEFUN narg # define a function. The "next" field contains 113 # the body of the function. 114 115NARG narg # represents a word 116 type int 117 next nodeptr # next word in list 118 text string # the text of the word 119 backquote nodelist # list of commands in back quotes 120 121NTO nfile # fd> fname 122NFROM nfile # fd< fname 123NAPPEND nfile # fd>> fname 124 type int 125 next nodeptr # next redirection in list 126 fd int # file descriptor being redirected 127 fname nodeptr # file name, in a NARG node 128 expfname temp char *expfname # actual file name 129 130NTOFD ndup # fd<&dupfd 131NFROMFD ndup # fd>&dupfd 132 type int 133 next nodeptr # next redirection in list 134 fd int # file descriptor being redirected 135 dupfd int # file descriptor to duplicate 136 137NHERE nhere # fd<<\! 138NXHERE nhere # fd<<! 139 type int 140 next nodeptr # next redirection in list 141 fd int # file descriptor being redirected 142 doc nodeptr # input to command (NARG node) 143