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# @(#)nodetypes 8.2 (Berkeley) 5/4/95 37# $FreeBSD: src/bin/sh/nodetypes,v 1.6.2.2 2002/07/19 04:38:52 tjr Exp $ 38# $DragonFly: src/bin/sh/nodetypes,v 1.2 2003/06/17 04:22:50 dillon Exp $ 39 40# This file describes the nodes used in parse trees. Unindented lines 41# contain a node type followed by a structure tag. Subsequent indented 42# lines specify the fields of the structure. Several node types can share 43# the same structure, in which case the fields of the structure should be 44# specified only once. 45# 46# A field of a structure is described by the name of the field followed 47# by a type. The currently implemented types are: 48# nodeptr - a pointer to a node 49# nodelist - a pointer to a list of nodes 50# string - a pointer to a nul terminated string 51# int - an integer 52# other - any type that can be copied by assignment 53# temp - a field that doesn't have to be copied when the node is copied 54# The last two types should be followed by the text of a C declaration for 55# the field. 56 57NSEMI nbinary # two commands separated by a semicolon 58 type int 59 ch1 nodeptr # the first child 60 ch2 nodeptr # the second child 61 62NCMD ncmd # a simple command 63 type int 64 backgnd int # set to run command in background 65 args nodeptr # the arguments 66 redirect nodeptr # list of file redirections 67 68NPIPE npipe # a pipeline 69 type int 70 backgnd int # set to run pipeline in background 71 cmdlist nodelist # the commands in the pipeline 72 73NREDIR nredir # redirection (of a compex command) 74 type int 75 n nodeptr # the command 76 redirect nodeptr # list of file redirections 77 78NBACKGND nredir # run command in background 79NSUBSHELL nredir # run command in a subshell 80 81NAND nbinary # the && operator 82NOR nbinary # the || operator 83 84NIF nif # the if statement. Elif clauses are handled 85 type int # using multiple if nodes. 86 test nodeptr # if test 87 ifpart nodeptr # then ifpart 88 elsepart nodeptr # else elsepart 89 90NWHILE nbinary # the while statement. First child is the test 91NUNTIL nbinary # the until statement 92 93NFOR nfor # the for statement 94 type int 95 args nodeptr # for var in args 96 body nodeptr # do body; done 97 var string # the for variable 98 99NCASE ncase # a case statement 100 type int 101 expr nodeptr # the word to switch on 102 cases nodeptr # the list of cases (NCLIST nodes) 103 104NCLIST nclist # a case 105 type int 106 next nodeptr # the next case in list 107 pattern nodeptr # list of patterns for this case 108 body nodeptr # code to execute for this case 109 110 111NDEFUN narg # define a function. The "next" field contains 112 # the body of the function. 113 114NARG narg # represents a word 115 type int 116 next nodeptr # next word in list 117 text string # the text of the word 118 backquote nodelist # list of commands in back quotes 119 120NTO nfile # fd> fname 121NFROM nfile # fd< fname 122NFROMTO nfile # fd<> fname 123NAPPEND nfile # fd>> fname 124NCLOBBER nfile # fd>| fname 125 type int 126 next nodeptr # next redirection in list 127 fd int # file descriptor being redirected 128 fname nodeptr # file name, in a NARG node 129 expfname temp char *expfname # actual file name 130 131NTOFD ndup # fd<&dupfd 132NFROMFD ndup # fd>&dupfd 133 type int 134 next nodeptr # next redirection in list 135 fd int # file descriptor being redirected 136 dupfd int # file descriptor to duplicate 137 vname nodeptr # file name if fd>&$var 138 139 140NHERE nhere # fd<<\! 141NXHERE nhere # fd<<! 142 type int 143 next nodeptr # next redirection in list 144 fd int # file descriptor being redirected 145 doc nodeptr # input to command (NARG node) 146 147NNOT nnot # ! command (actually pipeline) 148 type int 149 com nodeptr 150