1
# $NetBSD: nodetypes,v 1.12 2003/08/22 11:22:23 agc Exp $
2
# Copyright (c) 1991, 1993
3
# The Regents of the University of California. All rights reserved.
5
# This code is derived from software contributed to Berkeley by
8
# Redistribution and use in source and binary forms, with or without
9
# modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
17
# may be used to endorse or promote products derived from this software
18
# without specific prior written permission.
20
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32
# @(#)nodetypes 8.2 (Berkeley) 5/4/95
34
# This file describes the nodes used in parse trees. Unindented lines
35
# contain a node type followed by a structure tag. Subsequent indented
36
# lines specify the fields of the structure. Several node types can share
37
# the same structure, in which case the fields of the structure should be
38
# specified only once.
40
# A field of a structure is described by the name of the field followed
41
# by a type. The currently implemented types are:
42
# nodeptr - a pointer to a node
43
# nodelist - a pointer to a list of nodes
44
# string - a pointer to a nul terminated string
46
# other - any type that can be copied by assignment
47
# temp - a field that doesn't have to be copied when the node is copied
48
# The last two types should be followed by the text of a C declaration for
51
NSEMI nbinary # two commands separated by a semicolon
53
ch1 nodeptr # the first child
54
ch2 nodeptr # the second child
56
NCMD ncmd # a simple command
58
backgnd int # set to run command in background
59
args nodeptr # the arguments
60
redirect nodeptr # list of file redirections
62
NPIPE npipe # a pipeline
64
backgnd int # set to run pipeline in background
65
cmdlist nodelist # the commands in the pipeline
67
NREDIR nredir # redirection (of a complex command)
69
n nodeptr # the command
70
redirect nodeptr # list of file redirections
72
NBACKGND nredir # run command in background
73
NSUBSHELL nredir # run command in a subshell
75
NAND nbinary # the && operator
76
NOR nbinary # the || operator
78
NIF nif # the if statement. Elif clauses are handled
79
type int # using multiple if nodes.
80
test nodeptr # if test
81
ifpart nodeptr # then ifpart
82
elsepart nodeptr # else elsepart
84
NWHILE nbinary # the while statement. First child is the test
85
NUNTIL nbinary # the until statement
87
NFOR nfor # the for statement
89
args nodeptr # for var in args
90
body nodeptr # do body; done
91
var string # the for variable
93
NCASE ncase # a case statement
95
expr nodeptr # the word to switch on
96
cases nodeptr # the list of cases (NCLIST nodes)
98
NCLIST nclist # a case
100
next nodeptr # the next case in list
101
pattern nodeptr # list of patterns for this case
102
body nodeptr # code to execute for this case
105
NDEFUN narg # define a function. The "next" field contains
106
# the body of the function.
108
NARG narg # represents a word
110
next nodeptr # next word in list
111
text string # the text of the word
112
backquote nodelist # list of commands in back quotes
114
NTO nfile # fd> fname
115
NCLOBBER nfile # fd>| fname
116
NFROM nfile # fd< fname
117
NFROMTO nfile # fd<> fname
118
NAPPEND nfile # fd>> fname
120
next nodeptr # next redirection in list
121
fd int # file descriptor being redirected
122
fname nodeptr # file name, in a NARG node
123
expfname temp char *expfname # actual file name
125
NTOFD ndup # fd<&dupfd
126
NFROMFD ndup # fd>&dupfd
128
next nodeptr # next redirection in list
129
fd int # file descriptor being redirected
130
dupfd int # file descriptor to duplicate
131
vname nodeptr # file name if fd>&$var
137
next nodeptr # next redirection in list
138
fd int # file descriptor being redirected
139
doc nodeptr # input to command (NARG node)
141
NNOT nnot # ! command (actually pipeline)
added
removed
ash/nodetypes
