#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# These should all be safe
LC_ALL=C
LC_CTYPE=C
LC_COLLATE=C
LC_MESSAGES=C

# these tests should all generate errors

# make sure we don't exit prematurely
set +e
set +o posix

# various alias/unalias errors
unalias

# at some point, this may mean to `export' an alias, like ksh, but
# for now it is an error
alias -x foo=barz
unalias -x fooaha
alias hoowah
unalias hoowah

# the iteration variable must be a valid identifier
for 1 in a b c
do
	echo $1
done
for f\1 in a b c ; do echo $f ; done

# in posix mode, it's a fatal error
(set -o posix
for invalid-name in a b c; do echo $1; done; echo after posix for)
(set -o posix
for f\1 in a b c ; do echo $f ; done; echo after posix for 2)

# same with select
select 1 in a b c; do echo $REPLY; done
select f\1 in a b c ; do echo $REPLY ; done
select invalid-name in a b c; do echo $REPLY; done

(set -o posix ; select 1 in a b c; do echo $REPLY; done; echo after posix select)
(set -o posix ; select f\1 in a b c ; do echo $REPLY ; done ; echo after posix select 2)

# even in functions
bad-select()
{
        select $1 in a b c ; do echo $REPLY ; done
}
bad-select 'a b'
unset -f bad-select

# try to rebind a read-only function
func()
{
	echo func
}
readonly -f func
# make sure `readonly' and `declare' play well together
declare -Fr
func()
{
	echo bar
}

# bad option
unset -x func

# cannot unset readonly functions or variables
unset -f func
# or make them not readonly
declare -fr func
declare -f +r func

# cannot use declare -f in combination with other attributes
a() { echo a; }
declare -f -a a
declare -f -i b c

XPATH=$PATH
declare -r XPATH
unset -v XPATH

# cannot unset invalid identifiers
unset /bin/sh

# cannot unset function and variable at the same time
unset -f -v SHELL

# bad option
declare -z
# cannot declare invalid identifiers
declare -- -z 
declare /bin/sh

# this is the syntax used to export functions in the environment, but
# it cannot be used with `declare'
declare -f func='() { echo "this is func"; }'

# bad option to exec -- this should not exit the script
exec -i /bin/sh

# trying to exec non-executable file is a fatal error
( exec ./errors1.sub 2>/dev/null ; echo after failed exec )

# try to export -f something that is not a function -- this should be
# an error, not create an `invisible function'
export -f XPATH

# this depends on the setting of BREAK_COMPLAINS in config.h.in
break
continue

# this should not exit the shell; it did in versions before 2.01
shift label

# other shells do not complain about the extra arguments; maybe someday
# we won't either
set -- a b c
shift $# label
# and get rid of the positional parameters
shift $#

# let without an expression is an error, though maybe it should just return
# success
let

# local outside a function is an error
local

# logout of a non-login shell is an error
logout

# try to hash a non-existent command
hash notthere

# bad option to hash, although it may mean `verbose' at some future point
hash -v

# hash -d requires an argument
hash -d

# turn off hashing, then try to hash something
set +o hashall
hash -p ${THIS_SH} ${THIS_SH##*/}

declare -a AA
unset AA[-2]

# try to assign to a readonly array
declare -r AA
AA=( one two three )

# make sure `readonly -n' doesn't turn off readonly status
readonly -n AA
AA=(one two three)

# try to assign a readonly array with bad assignment syntax
# NOTE: this works in post-bash-2.05 (at least when I write this)
# readonly -a ZZZ=bbb

# bad counts to `shift'
shopt -s shift_verbose
shift $(( $# + 5 ))
shift -2
shift -- $(( $# + 5 ))
shift -- -2

# bad shell options
shopt -s no_such_option
shopt no_such_option
shopt -s -o no_such_option

# non-octal digits for umask and other errors
umask 09
umask -S u=rwx:g=rwx:o=rx >/dev/null # 002
umask -S u:rwx,g:rwx,o:rx >/dev/null # 002

# at some point, this may mean `invert', but for now it is an error
umask -i

# bad assignments shouldn't change the umask
mask=$(umask)
umask g=p
mask2=$(umask)
if [ "$mask" != "$mask2" ]; then
	echo "umask errors change process umask"
fi

# assignment to a readonly variable in environment
VAR=4
readonly VAR
VAR=7 :

# more readonly variable tests
declare VAR=88
declare +r VAR

declare -p unset

# iteration variable in a for statement being readonly
for VAR in 1 2 3 ; do echo $VAR; done

# parser errors; caught early so we have to run them in subshells
${THIS_SH} -c ': $( for z in 1 2 3; do )' comsub
${THIS_SH} -c ': $( for z in 1 2 3; done )' comsub

# various `cd' errors
( unset HOME ; cd )
( HOME=/tmp/xyz.bash ; cd )
# errors from cd
cd -
cd /bin/sh	# error - not a directory
OLDPWD=/tmp/cd-notthere
cd -
# too many arguments
cd one two three
# cd doesn't like it if PWD is readonly
${THIS_SH} -c 'readonly PWD ; cd / ; echo $?' bash
# or if OLDPWD is readonly
${THIS_SH} -c 'readonly OLDPWD ; cd / ; echo $?' bash

# various `source/.' errors
.
source

# maybe someday this will work like in rc
. -i /dev/tty

# make sure that this gives an error rather than setting $1
set -q

# enable non-builtins
enable sh bash

# try to set and unset shell options simultaneously
shopt -s -u checkhash

# error
read -x

# this is an error -- bad timeout spec
read -t var < /dev/null

# try to read into an invalid identifier
read /bin/sh < /dev/null
read A /bin/sh < /dev/null
read -a invalid-name < /dev/null

# try to read into a readonly variable
read VAR < /dev/null

# invalid file descriptor
read -u XX < /dev/null
read -u 42 < /dev/null

# same with mapfile
mapfile -u XX A < /dev/null
mapfile -u 42 A < /dev/null
unset -v A

# invalid identifier arguments to mapfile
mapfile '' </dev/null
mapfile invalid-var < /dev/null

# bad option to readonly/export
readonly -x foo

# someday these may mean something, but for now they're errors
eval -i "echo $-"
command -i "echo $-"

# this caused a core dump in bash-2.01 (fixed in bash-2.01.1)
eval echo \$[/bin/sh + 0]
eval echo '$((/bin/sh + 0))'

# error to list trap for an unknown signal
trap -p NOSIG

# maybe someday trap will take a -s argument like kill, but not now
trap -p -s NOSIG

# we have a ksh-like ERR trap, post-bash-2.05
#trap 'echo [$LINENO] -- error' ERR

# can only return from a function or sourced script
return 2

# break and continue with arguments <= 0
for z in 1 2 3; do
	break 0
	echo $x
done
for z in 1 2 3; do
	continue 0
	echo $x
done

# invalid option
builtin -x

# builtin with non-builtin
builtin bash

# maybe someday you will be able to use fg/bg when job control is not really
# active, but for now they are errors
bg
fg

# argument required
kill
kill -s
# bad argument
kill -S
# null argument
kill -INT ''
# argument required
kill -INT
# bad signal specification
kill -l SIGBAD
# bad signal specification
kill -l BAD
# bad process specification
kill -HUP @12

# cannot unset non-unsettable variables
unset -v BASH_LINENO BASH_SOURCE

# bad shell option names
set -o trackall		# bash is not ksh
set -q			# this is an error
set -i			# this is not allowed

# problem with versions through bash-4.2
readonly xx=5
echo $((xx=5))
echo $?

${THIS_SH} ./errors1.sub
${THIS_SH} ./errors2.sub
${THIS_SH} ./errors3.sub
${THIS_SH} ./errors4.sub
${THIS_SH} -o posix ./errors4.sub

${THIS_SH} ./errors5.sub

${THIS_SH} ./errors6.sub
THIS_SH="${THIS_SH} -o posix" ${THIS_SH} ./errors6.sub

${THIS_SH} ./errors7.sub
${THIS_SH} -o posix ./errors7.sub

${THIS_SH} ./errors8.sub
${THIS_SH} ./errors9.sub

# invalid numeric arguments and too many arguments
${THIS_SH} ./errors10.sub

# invalid identifiers to readonly/export
${THIS_SH} ./errors11.sub

# EOF when parsing compound commands
${THIS_SH} ./errors12.sub

${THIS_SH} -c 'return ; echo after return' bash
${THIS_SH} -o posix -c 'return ; echo after return' bash

# various posix-mode special builtin fatal (or not) errors

# posix says unsetting readonly variables is a fatal error
${THIS_SH} -o posix -c 'readonly a=a ; unset -v a; echo after unset 1' sh
# the same with non-identifiers
${THIS_SH} -o posix -c 'unset -v a-b; echo after unset 2' sh
# and sourcing a non-existent file is fatal too
${THIS_SH} -o posix -c '. /nosuchfile ; echo after source' sh
# but trap specifying a bad signal nunber is non-fatal
${THIS_SH} -o posix -c 'trap "echo bad" SIGNOSIG; echo after trap' sh

# in posix mode, this is no longer a fatal error
# a function name does not have to be a valid identifier
set -o posix
function !! () { fc -s "$@" ; }
set +o posix

echo end