| # Copyright (c) 1991, 1993 | |
| # The Regents of the University of California. All rights reserved. | |
| # Copyright (c) 1997-2005 | |
| # Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. | |
| # | |
| # This code is derived from software contributed to Berkeley by | |
| # Kenneth Almquist. | |
| # | |
| # Redistribution and use in source and binary forms, with or without | |
| # modification, are permitted provided that the following conditions | |
| # are met: | |
| # 1. Redistributions of source code must retain the above copyright | |
| # notice, this list of conditions and the following disclaimer. | |
| # 2. Redistributions in binary form must reproduce the above copyright | |
| # notice, this list of conditions and the following disclaimer in the | |
| # documentation and/or other materials provided with the distribution. | |
| # 3. Neither the name of the University nor the names of its contributors | |
| # may be used to endorse or promote products derived from this software | |
| # without specific prior written permission. | |
| # | |
| # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| # SUCH DAMAGE. | |
| # | |
| # @(#)nodetypes 8.2 (Berkeley) 5/4/95 | |
| # This file describes the nodes used in parse trees. Unindented lines | |
| # contain a node type followed by a structure tag. Subsequent indented | |
| # lines specify the fields of the structure. Several node types can share | |
| # the same structure, in which case the fields of the structure should be | |
| # specified only once. | |
| # | |
| # A field of a structure is described by the name of the field followed | |
| # by a type. The currently implemented types are: | |
| # nodeptr - a pointer to a node | |
| # nodelist - a pointer to a list of nodes | |
| # string - a pointer to a nul terminated string | |
| # int - an integer | |
| # other - any type that can be copied by assignment | |
| # temp - a field that doesn't have to be copied when the node is copied | |
| # The last two types should be followed by the text of a C declaration for | |
| # the field. | |
| NCMD ncmd # a simple command | |
| type int | |
| linno int | |
| assign nodeptr # variable assignments | |
| args nodeptr # the arguments | |
| redirect nodeptr # list of file redirections | |
| NPIPE npipe # a pipeline | |
| type int | |
| backgnd int # set to run pipeline in background | |
| cmdlist nodelist # the commands in the pipeline | |
| NREDIR nredir # redirection (of a complex command) | |
| type int | |
| linno int | |
| n nodeptr # the command | |
| redirect nodeptr # list of file redirections | |
| NBACKGND nredir # run command in background | |
| NSUBSHELL nredir # run command in a subshell | |
| NAND nbinary # the && operator | |
| NOR nbinary # the || operator | |
| NSEMI nbinary # two commands separated by a semicolon | |
| type int | |
| ch1 nodeptr # the first child | |
| ch2 nodeptr # the second child | |
| NIF nif # the if statement. Elif clauses are handled | |
| type int # using multiple if nodes. | |
| test nodeptr # if test | |
| ifpart nodeptr # then ifpart | |
| elsepart nodeptr # else elsepart | |
| NWHILE nbinary # the while statement. First child is the test | |
| NUNTIL nbinary # the until statement | |
| NFOR nfor # the for statement | |
| type int | |
| linno int | |
| args nodeptr # for var in args | |
| body nodeptr # do body; done | |
| var string # the for variable | |
| NCASE ncase # a case statement | |
| type int | |
| linno int | |
| expr nodeptr # the word to switch on | |
| cases nodeptr # the list of cases (NCLIST nodes) | |
| NCLIST nclist # a case | |
| type int | |
| next nodeptr # the next case in list | |
| pattern nodeptr # list of patterns for this case | |
| body nodeptr # code to execute for this case | |
| NDEFUN ndefun # a function | |
| type int | |
| linno int | |
| text string | |
| body nodeptr | |
| NARG narg # represents a word | |
| type int | |
| next nodeptr # next word in list | |
| text string # the text of the word | |
| backquote nodelist # list of commands in back quotes | |
| NTO nfile # fd> fname | |
| NCLOBBER nfile # fd>| fname | |
| NFROM nfile # fd< fname | |
| NFROMTO nfile # fd<> fname | |
| NAPPEND nfile # fd>> fname | |
| type int | |
| next nodeptr # next redirection in list | |
| fd int # file descriptor being redirected | |
| fname nodeptr # file name, in a NARG node | |
| expfname temp char *expfname # actual file name | |
| NTOFD ndup # fd<&dupfd | |
| NFROMFD ndup # fd>&dupfd | |
| type int | |
| next nodeptr # next redirection in list | |
| fd int # file descriptor being redirected | |
| dupfd int # file descriptor to duplicate | |
| vname nodeptr # file name if fd>&$var | |
| NHERE nhere # fd<<\! | |
| NXHERE nhere # fd<<! | |
| type int | |
| next nodeptr # next redirection in list | |
| fd int # file descriptor being redirected | |
| doc nodeptr # input to command (NARG node) | |
| NNOT nnot # ! command (actually pipeline) | |
| type int | |
| com nodeptr |