1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
147 lines
5.2 KiB
Plaintext
147 lines
5.2 KiB
Plaintext
#
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# Copyright (c) 1991, 1993
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# The Regents of the University of California. All rights reserved.
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#
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# This code is derived from software contributed to Berkeley by
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# Kenneth Almquist.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the University of
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# California, Berkeley and its contributors.
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# 4. Neither the name of the University nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# @(#)nodetypes 8.2 (Berkeley) 5/4/95
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# $FreeBSD$
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# This file describes the nodes used in parse trees. Unindented lines
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# contain a node type followed by a structure tag. Subsequent indented
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# lines specify the fields of the structure. Several node types can share
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# the same structure, in which case the fields of the structure should be
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# specified only once.
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#
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# A field of a structure is described by the name of the field followed
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# by a type. The currently implemented types are:
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# nodeptr - a pointer to a node
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# nodelist - a pointer to a list of nodes
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# string - a pointer to a nul terminated string
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# int - an integer
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# other - any type that can be copied by assignment
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# temp - a field that doesn't have to be copied when the node is copied
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# The last two types should be followed by the text of a C declaration for
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# the field.
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NSEMI nbinary # two commands separated by a semicolon
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type int
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ch1 nodeptr # the first child
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ch2 nodeptr # the second child
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NCMD ncmd # a simple command
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type int
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backgnd int # set to run command in background
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args nodeptr # the arguments
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redirect nodeptr # list of file redirections
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NPIPE npipe # a pipeline
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type int
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backgnd int # set to run pipeline in background
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cmdlist nodelist # the commands in the pipeline
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NREDIR nredir # redirection (of a compex command)
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type int
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n nodeptr # the command
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redirect nodeptr # list of file redirections
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NBACKGND nredir # run command in background
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NSUBSHELL nredir # run command in a subshell
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NAND nbinary # the && operator
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NOR nbinary # the || operator
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NIF nif # the if statement. Elif clauses are handled
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type int # using multiple if nodes.
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test nodeptr # if test
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ifpart nodeptr # then ifpart
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elsepart nodeptr # else elsepart
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NWHILE nbinary # the while statement. First child is the test
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NUNTIL nbinary # the until statement
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NFOR nfor # the for statement
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type int
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args nodeptr # for var in args
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body nodeptr # do body; done
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var string # the for variable
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NCASE ncase # a case statement
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type int
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expr nodeptr # the word to switch on
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cases nodeptr # the list of cases (NCLIST nodes)
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NCLIST nclist # a case
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type int
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next nodeptr # the next case in list
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pattern nodeptr # list of patterns for this case
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body nodeptr # code to execute for this case
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NDEFUN narg # define a function. The "next" field contains
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# the body of the function.
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NARG narg # represents a word
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type int
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next nodeptr # next word in list
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text string # the text of the word
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backquote nodelist # list of commands in back quotes
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NTO nfile # fd> fname
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NFROM nfile # fd< fname
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NAPPEND nfile # fd>> fname
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type int
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next nodeptr # next redirection in list
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fd int # file descriptor being redirected
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fname nodeptr # file name, in a NARG node
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expfname temp char *expfname # actual file name
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NTOFD ndup # fd<&dupfd
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NFROMFD ndup # fd>&dupfd
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type int
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next nodeptr # next redirection in list
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fd int # file descriptor being redirected
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dupfd int # file descriptor to duplicate
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vname nodeptr # file name if fd>&$var
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NHERE nhere # fd<<\!
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NXHERE nhere # fd<<!
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type int
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next nodeptr # next redirection in list
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fd int # file descriptor being redirected
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doc nodeptr # input to command (NARG node)
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NNOT nnot # ! command (actually pipeline)
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type int
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com nodeptr
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