fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
146 lines
5.1 KiB
Plaintext
146 lines
5.1 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. 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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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 ending with ;;
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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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NCLISTFALLTHRU nclist # a case ending with ;&
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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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NFROMTO nfile # fd<> fname
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NAPPEND nfile # fd>> fname
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NCLOBBER nfile # fd>| fname
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type int
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fd int # file descriptor being redirected
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next nodeptr # next redirection in list
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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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fd int # file descriptor being redirected
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next nodeptr # next redirection in list
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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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fd int # file descriptor being redirected
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next nodeptr # next redirection in list
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doc nodeptr # input to command (NARG node)
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expdoc temp const char *expdoc # actual document (for NXHERE)
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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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