freebsd-skq/bin/sh/nodetypes
jmmv 80efbcbbcd Sync sh(1) in stable/10 to head.
This is a MFC of all the commits listed below.

My original goal of this change was to only merge the move of the tests
from tools/regression/bin/ into the new layout (which include tests for
sh(1) and other tools as well).  However, doing so is tricky due to the
ongoing work in sh(1) and, especially, the many changes to its tests
since stable/10 was first branched.

Merging everything is the simplest way to achieve this goal and, as a
bonus point, we get various fixes and miscellaneous improvements into
the branch.

Per jilles' suggestion, I'm avoiding the merge of a couple of changes
(r256850 and r257506) that required depending kernel changes.  I'm also
avoiding very recent changes that have not had a long enough time to be
validated in current.

This is "make tinderbox" clean.

r256735	sh: Remove one syscall when waiting for a foreground job.
r257399	sh: Allow trapping SIGINT/SIGQUIT after ignore because of '&'.
r257504	sh: Reorder union node to reduce its size on 64-bit platforms.
r257920	sh: Add a test case for would-be assignments that are not due to quoting.
r257929	sh: Properly quote alias output from command -v.
r258489	sh: Add tests for the </dev/null implicit in a background command.
r258533	sh: Add more tests for the </dev/null implicit in a background command.
r258535	sh: Make <&0 disable the </dev/null implicit in a background command.
r258776	sh: Prefer memcpy() to strcpy() in most cases. Remove the scopy macro.
r259047	sh: Split set -x output into a separate function.
r259210	Migrate tools/regression/bin/ tests to the new layout.
r259844	sh: Remove an unused variable.
r259846	sh: Initialize OPTIND=1 even if it came from the environment.
r259874	sh: Simplify code related to PPID variable.
r259946	sh: Don't check input for non-whitespace if history is disabled.
r260246	sh(1): Discourage use of -e.
r260506	Run the sh(1) and test(1) tests as unprivileged.
r260586	Mark the bin/pax tests as requiring perl.
r260634	Use TAP_TESTS_PERL to register the legacy_test in bin/pax.
r260635	Replace hand-crafted Kyuafiles with automatic generation.
r260654	sh: Remove SIGWINCH handler and just check for resize before every read.
r261121	sh: Add test for nested alias.
r261125	sh: Solve the alias recursion problem in a less hackish way.
r261141	sh: Do not depend on parse/execute split in new alias test.
r261160	sh: Add tests for alias names after another alias.
r261192	sh: Allow aliases to force alias substitution on the following word.
r262533	sh: Make expari() static.
r262565	sh: Do not corrupt internal representation if LINENO inner expansion fails.
r262697	sh: Simplify expari().

Reviewed by:	jilles
2014-03-09 17:04:31 +00:00

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#-
# Copyright (c) 1991, 1993
# The Regents of the University of California. 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.
# 4. 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
# $FreeBSD$
# 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.
NSEMI nbinary # two commands separated by a semicolon
type int
ch1 nodeptr # the first child
ch2 nodeptr # the second child
NCMD ncmd # a simple command
type int
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 compex command)
type 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
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
args nodeptr # for var in args
body nodeptr # do body; done
var string # the for variable
NCASE ncase # a case statement
type int
expr nodeptr # the word to switch on
cases nodeptr # the list of cases (NCLIST nodes)
NCLIST nclist # a case ending with ;;
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
NCLISTFALLTHRU nclist # a case ending with ;&
NDEFUN narg # define a function. The "next" field contains
# the body of the function.
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
NFROM nfile # fd< fname
NFROMTO nfile # fd<> fname
NAPPEND nfile # fd>> fname
NCLOBBER nfile # fd>| fname
type int
fd int # file descriptor being redirected
next nodeptr # next redirection in list
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
fd int # file descriptor being redirected
next nodeptr # next redirection in list
dupfd int # file descriptor to duplicate
vname nodeptr # file name if fd>&$var
NHERE nhere # fd<<\!
NXHERE nhere # fd<<!
type int
fd int # file descriptor being redirected
next nodeptr # next redirection in list
doc nodeptr # input to command (NARG node)
expdoc temp char *expdoc # actual document (for NXHERE)
NNOT nnot # ! command (actually pipeline)
type int
com nodeptr