1139969Simp#- 21556Srgrimes# Copyright (c) 1991, 1993 31556Srgrimes# The Regents of the University of California. All rights reserved. 41556Srgrimes# 51556Srgrimes# This code is derived from software contributed to Berkeley by 61556Srgrimes# Kenneth Almquist. 71556Srgrimes# 81556Srgrimes# Redistribution and use in source and binary forms, with or without 91556Srgrimes# modification, are permitted provided that the following conditions 101556Srgrimes# are met: 111556Srgrimes# 1. Redistributions of source code must retain the above copyright 121556Srgrimes# notice, this list of conditions and the following disclaimer. 131556Srgrimes# 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes# notice, this list of conditions and the following disclaimer in the 151556Srgrimes# documentation and/or other materials provided with the distribution. 161556Srgrimes# 4. Neither the name of the University nor the names of its contributors 171556Srgrimes# may be used to endorse or promote products derived from this software 181556Srgrimes# without specific prior written permission. 191556Srgrimes# 201556Srgrimes# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes# SUCH DAMAGE. 311556Srgrimes# 3217987Speter# @(#)nodetypes 8.2 (Berkeley) 5/4/95 3350471Speter# $FreeBSD$ 341556Srgrimes 351556Srgrimes# This file describes the nodes used in parse trees. Unindented lines 361556Srgrimes# contain a node type followed by a structure tag. Subsequent indented 371556Srgrimes# lines specify the fields of the structure. Several node types can share 381556Srgrimes# the same structure, in which case the fields of the structure should be 391556Srgrimes# specified only once. 401556Srgrimes# 411556Srgrimes# A field of a structure is described by the name of the field followed 421556Srgrimes# by a type. The currently implemented types are: 431556Srgrimes# nodeptr - a pointer to a node 441556Srgrimes# nodelist - a pointer to a list of nodes 451556Srgrimes# string - a pointer to a nul terminated string 461556Srgrimes# int - an integer 471556Srgrimes# other - any type that can be copied by assignment 481556Srgrimes# temp - a field that doesn't have to be copied when the node is copied 491556Srgrimes# The last two types should be followed by the text of a C declaration for 501556Srgrimes# the field. 511556Srgrimes 521556SrgrimesNSEMI nbinary # two commands separated by a semicolon 531556Srgrimes type int 541556Srgrimes ch1 nodeptr # the first child 551556Srgrimes ch2 nodeptr # the second child 561556Srgrimes 571556SrgrimesNCMD ncmd # a simple command 581556Srgrimes type int 591556Srgrimes args nodeptr # the arguments 601556Srgrimes redirect nodeptr # list of file redirections 611556Srgrimes 621556SrgrimesNPIPE npipe # a pipeline 631556Srgrimes type int 641556Srgrimes backgnd int # set to run pipeline in background 651556Srgrimes cmdlist nodelist # the commands in the pipeline 661556Srgrimes 671556SrgrimesNREDIR nredir # redirection (of a compex command) 681556Srgrimes type int 691556Srgrimes n nodeptr # the command 701556Srgrimes redirect nodeptr # list of file redirections 711556Srgrimes 721556SrgrimesNBACKGND nredir # run command in background 731556SrgrimesNSUBSHELL nredir # run command in a subshell 741556Srgrimes 751556SrgrimesNAND nbinary # the && operator 761556SrgrimesNOR nbinary # the || operator 771556Srgrimes 781556SrgrimesNIF nif # the if statement. Elif clauses are handled 791556Srgrimes type int # using multiple if nodes. 801556Srgrimes test nodeptr # if test 811556Srgrimes ifpart nodeptr # then ifpart 821556Srgrimes elsepart nodeptr # else elsepart 831556Srgrimes 841556SrgrimesNWHILE nbinary # the while statement. First child is the test 851556SrgrimesNUNTIL nbinary # the until statement 861556Srgrimes 871556SrgrimesNFOR nfor # the for statement 881556Srgrimes type int 891556Srgrimes args nodeptr # for var in args 901556Srgrimes body nodeptr # do body; done 911556Srgrimes var string # the for variable 921556Srgrimes 931556SrgrimesNCASE ncase # a case statement 941556Srgrimes type int 951556Srgrimes expr nodeptr # the word to switch on 961556Srgrimes cases nodeptr # the list of cases (NCLIST nodes) 971556Srgrimes 98223186SjillesNCLIST nclist # a case ending with ;; 991556Srgrimes type int 1001556Srgrimes next nodeptr # the next case in list 1011556Srgrimes pattern nodeptr # list of patterns for this case 1021556Srgrimes body nodeptr # code to execute for this case 1031556Srgrimes 104223186SjillesNCLISTFALLTHRU nclist # a case ending with ;& 1051556Srgrimes 1061556SrgrimesNDEFUN narg # define a function. The "next" field contains 1071556Srgrimes # the body of the function. 1081556Srgrimes 1091556SrgrimesNARG narg # represents a word 1101556Srgrimes type int 1111556Srgrimes next nodeptr # next word in list 1121556Srgrimes text string # the text of the word 1131556Srgrimes backquote nodelist # list of commands in back quotes 1141556Srgrimes 1151556SrgrimesNTO nfile # fd> fname 1161556SrgrimesNFROM nfile # fd< fname 11766612SbrianNFROMTO nfile # fd<> fname 1181556SrgrimesNAPPEND nfile # fd>> fname 11996922StjrNCLOBBER nfile # fd>| fname 1201556Srgrimes type int 1211556Srgrimes next nodeptr # next redirection in list 1221556Srgrimes fd int # file descriptor being redirected 1231556Srgrimes fname nodeptr # file name, in a NARG node 1241556Srgrimes expfname temp char *expfname # actual file name 1251556Srgrimes 1261556SrgrimesNTOFD ndup # fd<&dupfd 1271556SrgrimesNFROMFD ndup # fd>&dupfd 1281556Srgrimes type int 1291556Srgrimes next nodeptr # next redirection in list 1301556Srgrimes fd int # file descriptor being redirected 1311556Srgrimes dupfd int # file descriptor to duplicate 13217987Speter vname nodeptr # file name if fd>&$var 1331556Srgrimes 13417987Speter 1351556SrgrimesNHERE nhere # fd<<\! 1361556SrgrimesNXHERE nhere # fd<<! 1371556Srgrimes type int 1381556Srgrimes next nodeptr # next redirection in list 1391556Srgrimes fd int # file descriptor being redirected 1401556Srgrimes doc nodeptr # input to command (NARG node) 1411556Srgrimes 1421556SrgrimesNNOT nnot # ! command (actually pipeline) 1431556Srgrimes type int 1441556Srgrimes com nodeptr 145