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2714 | cejka | 1 | # $NetBSD: nodetypes,v 1.9 1999/02/04 16:17:39 christos Exp $ |
2 | # Copyright (c) 1991, 1993 |
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3 | # The Regents of the University of California. All rights reserved. |
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4 | # |
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5 | # This code is derived from software contributed to Berkeley by |
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6 | # Kenneth Almquist. |
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7 | # |
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8 | # Redistribution and use in source and binary forms, with or without |
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9 | # modification, are permitted provided that the following conditions |
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10 | # are met: |
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11 | # 1. Redistributions of source code must retain the above copyright |
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12 | # notice, this list of conditions and the following disclaimer. |
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13 | # 2. Redistributions in binary form must reproduce the above copyright |
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14 | # notice, this list of conditions and the following disclaimer in the |
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15 | # documentation and/or other materials provided with the distribution. |
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16 | # 3. All advertising materials mentioning features or use of this software |
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17 | # must display the following acknowledgement: |
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18 | # This product includes software developed by the University of |
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19 | # California, Berkeley and its contributors. |
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20 | # 4. Neither the name of the University nor the names of its contributors |
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21 | # may be used to endorse or promote products derived from this software |
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22 | # without specific prior written permission. |
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23 | # |
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24 | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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25 | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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26 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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27 | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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28 | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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29 | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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30 | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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31 | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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32 | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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33 | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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34 | # SUCH DAMAGE. |
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35 | # |
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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 |
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39 | # contain a node type followed by a structure tag. Subsequent indented |
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40 | # lines specify the fields of the structure. Several node types can share |
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41 | # the same structure, in which case the fields of the structure should be |
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42 | # specified only once. |
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43 | # |
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44 | # A field of a structure is described by the name of the field followed |
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45 | # by a type. The currently implemented types are: |
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46 | # nodeptr - a pointer to a node |
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47 | # nodelist - a pointer to a list of nodes |
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48 | # string - a pointer to a nul terminated string |
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49 | # int - an integer |
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50 | # other - any type that can be copied by assignment |
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51 | # temp - a field that doesn't have to be copied when the node is copied |
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52 | # The last two types should be followed by the text of a C declaration for |
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53 | # the field. |
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54 | |||
55 | NSEMI nbinary # two commands separated by a semicolon |
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56 | type int |
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57 | ch1 nodeptr # the first child |
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58 | ch2 nodeptr # the second child |
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59 | |||
60 | NCMD ncmd # a simple command |
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61 | type int |
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62 | backgnd int # set to run command in background |
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63 | args nodeptr # the arguments |
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64 | redirect nodeptr # list of file redirections |
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65 | |||
66 | NPIPE npipe # a pipeline |
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67 | type int |
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68 | backgnd int # set to run pipeline in background |
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69 | cmdlist nodelist # the commands in the pipeline |
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70 | |||
71 | NREDIR nredir # redirection (of a compex command) |
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72 | type int |
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73 | n nodeptr # the command |
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74 | redirect nodeptr # list of file redirections |
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75 | |||
76 | NBACKGND nredir # run command in background |
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77 | NSUBSHELL nredir # run command in a subshell |
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78 | |||
79 | NAND nbinary # the && operator |
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80 | NOR nbinary # the || operator |
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81 | |||
82 | NIF nif # the if statement. Elif clauses are handled |
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83 | type int # using multiple if nodes. |
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84 | test nodeptr # if test |
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85 | ifpart nodeptr # then ifpart |
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86 | elsepart nodeptr # else elsepart |
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87 | |||
88 | NWHILE nbinary # the while statement. First child is the test |
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89 | NUNTIL nbinary # the until statement |
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90 | |||
91 | NFOR nfor # the for statement |
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92 | type int |
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93 | args nodeptr # for var in args |
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94 | body nodeptr # do body; done |
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95 | var string # the for variable |
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96 | |||
97 | NCASE ncase # a case statement |
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98 | type int |
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99 | expr nodeptr # the word to switch on |
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100 | cases nodeptr # the list of cases (NCLIST nodes) |
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101 | |||
102 | NCLIST nclist # a case |
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103 | type int |
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104 | next nodeptr # the next case in list |
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105 | pattern nodeptr # list of patterns for this case |
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106 | body nodeptr # code to execute for this case |
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107 | |||
108 | |||
109 | NDEFUN narg # define a function. The "next" field contains |
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110 | # the body of the function. |
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111 | |||
112 | NARG narg # represents a word |
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113 | type int |
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114 | next nodeptr # next word in list |
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115 | text string # the text of the word |
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116 | backquote nodelist # list of commands in back quotes |
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117 | |||
118 | NTO nfile # fd> fname |
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119 | NFROM nfile # fd< fname |
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120 | NFROMTO nfile # fd<> fname |
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121 | NAPPEND nfile # fd>> fname |
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122 | NTOOV nfile # fd>| fname |
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123 | type int |
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124 | next nodeptr # next redirection in list |
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125 | fd int # file descriptor being redirected |
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126 | fname nodeptr # file name, in a NARG node |
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127 | expfname temp char *expfname # actual file name |
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128 | |||
129 | NTOFD ndup # fd<&dupfd |
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130 | NFROMFD ndup # fd>&dupfd |
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131 | type int |
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132 | next nodeptr # next redirection in list |
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133 | fd int # file descriptor being redirected |
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134 | dupfd int # file descriptor to duplicate |
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135 | vname nodeptr # file name if fd>&$var |
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136 | |||
137 | |||
138 | NHERE nhere # fd<<\! |
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139 | NXHERE nhere # fd<<! |
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140 | type int |
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141 | next nodeptr # next redirection in list |
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142 | fd int # file descriptor being redirected |
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143 | doc nodeptr # input to command (NARG node) |
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144 | |||
145 | NNOT nnot # ! command (actually pipeline) |
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146 | type int |
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147 | com nodeptr |