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2 | # Copyright (c) 1991, 1993 |
3 | # The Regents of the University of California. All rights reserved. | |
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4 | # |
5 | # This code is derived from software contributed to Berkeley by | |
6 | # Kenneth Almquist. | |
7 | # | |
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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. | |
9b18046c | 23 | # |
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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 | # | |
fd88f5c5 | 36 | # @(#)nodetypes 8.2 (Berkeley) 5/4/95 |
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37 | |
38 | # This file describes the nodes used in parse trees. Unindented lines | |
39 | # contain a node type followed by a structure tag. Subsequent indented | |
40 | # lines specify the fields of the structure. Several node types can share | |
41 | # the same structure, in which case the fields of the structure should be | |
42 | # specified only once. | |
43 | # | |
44 | # A field of a structure is described by the name of the field followed | |
45 | # by a type. The currently implemented types are: | |
46 | # nodeptr - a pointer to a node | |
47 | # nodelist - a pointer to a list of nodes | |
48 | # string - a pointer to a nul terminated string | |
49 | # int - an integer | |
50 | # other - any type that can be copied by assignment | |
51 | # temp - a field that doesn't have to be copied when the node is copied | |
52 | # The last two types should be followed by the text of a C declaration for | |
53 | # the field. | |
54 | ||
55 | NSEMI nbinary # two commands separated by a semicolon | |
56 | type int | |
57 | ch1 nodeptr # the first child | |
58 | ch2 nodeptr # the second child | |
59 | ||
60 | NCMD ncmd # a simple command | |
61 | type int | |
62 | backgnd int # set to run command in background | |
63 | args nodeptr # the arguments | |
64 | redirect nodeptr # list of file redirections | |
65 | ||
66 | NPIPE npipe # a pipeline | |
67 | type int | |
68 | backgnd int # set to run pipeline in background | |
69 | cmdlist nodelist # the commands in the pipeline | |
70 | ||
71 | NREDIR nredir # redirection (of a compex command) | |
72 | type int | |
73 | n nodeptr # the command | |
74 | redirect nodeptr # list of file redirections | |
75 | ||
76 | NBACKGND nredir # run command in background | |
77 | NSUBSHELL nredir # run command in a subshell | |
78 | ||
79 | NAND nbinary # the && operator | |
80 | NOR nbinary # the || operator | |
81 | ||
82 | NIF nif # the if statement. Elif clauses are handled | |
83 | type int # using multiple if nodes. | |
84 | test nodeptr # if test | |
85 | ifpart nodeptr # then ifpart | |
86 | elsepart nodeptr # else elsepart | |
87 | ||
88 | NWHILE nbinary # the while statement. First child is the test | |
89 | NUNTIL nbinary # the until statement | |
90 | ||
91 | NFOR nfor # the for statement | |
92 | type int | |
93 | args nodeptr # for var in args | |
94 | body nodeptr # do body; done | |
95 | var string # the for variable | |
96 | ||
97 | NCASE ncase # a case statement | |
98 | type int | |
99 | expr nodeptr # the word to switch on | |
100 | cases nodeptr # the list of cases (NCLIST nodes) | |
101 | ||
102 | NCLIST nclist # a case | |
103 | type int | |
104 | next nodeptr # the next case in list | |
105 | pattern nodeptr # list of patterns for this case | |
106 | body nodeptr # code to execute for this case | |
107 | ||
108 | ||
109 | NDEFUN narg # define a function. The "next" field contains | |
110 | # the body of the function. | |
111 | ||
112 | NARG narg # represents a word | |
113 | type int | |
114 | next nodeptr # next word in list | |
115 | text string # the text of the word | |
116 | backquote nodelist # list of commands in back quotes | |
117 | ||
118 | NTO nfile # fd> fname | |
119 | NFROM nfile # fd< fname | |
120 | NAPPEND nfile # fd>> fname | |
121 | type int | |
122 | next nodeptr # next redirection in list | |
123 | fd int # file descriptor being redirected | |
124 | fname nodeptr # file name, in a NARG node | |
125 | expfname temp char *expfname # actual file name | |
126 | ||
127 | NTOFD ndup # fd<&dupfd | |
128 | NFROMFD ndup # fd>&dupfd | |
129 | type int | |
130 | next nodeptr # next redirection in list | |
131 | fd int # file descriptor being redirected | |
132 | dupfd int # file descriptor to duplicate | |
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133 | vname nodeptr # file name if fd>&$var |
134 | ||
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135 | |
136 | NHERE nhere # fd<<\! | |
137 | NXHERE nhere # fd<<! | |
138 | type int | |
139 | next nodeptr # next redirection in list | |
140 | fd int # file descriptor being redirected | |
141 | doc nodeptr # input to command (NARG node) | |
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142 | |
143 | NNOT nnot # ! command (actually pipeline) | |
144 | type int | |
145 | com nodeptr |