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# bug in bash up to and including bash-3.0 (including patches)
#
# problem is conflict between CTLNUL used internally to denote quoted null
# characters and its value (0x7f) appearing in the expansion of a variable
#
unset x
recho "xxx${x}yyy"
y=$'\177'
recho "xxx${y}yyy"
unset y
unset undef
set ""
recho ${undef-"x$*y"}
set $'\177'
recho ${undef-"x$*y"}
shift $#
f()
{
recho "-${*-x}-"
}
f ''
f $'\177'
unset -f f
x=12345
recho "${x:6:1}"
x=
recho "${x:0:1}"
y=$'\177'
recho "${y:0:1}"
y=xxx$'\177'yyy
recho "${y:3:3}"
unset x y
eval tmp=`printf "$'\\\\\x%x'\n" 127`
printf "%#1x\n" "'$tmp"
x=$'\177'
printf "%#1x\n" "'$x"
a=127
eval c=\$\'\\$(printf '%o' $a)\'
printf "%#1x\n" "'$c"
recho "$c"
recho "$c"@
recho @"$c"@
recho @"$c"
recho "$c"
recho "$c@"
recho "@$c@"
recho "@$c"
unset tmp x a c
qtest()
{
recho ${#q} "${q}" ${q}
}
q=$'\x7f'
qtest
q=${q}a
qtest
q=$'\x7fa'
qtest
q="${q}a"
qtest
unset -f qtest
unset q
set -- ''
recho "${*:1}"
recho ${*:1}
recho -${*:1}-
recho -"${*:1}"-
set $'\177'
recho "${*:1}"
recho "-${*:1}-"
recho ${*:1}
recho -${*:1}-
shift $#
DEL=`awk 'END{printf("%c", 0+127)}' </dev/null`
T1=a\ $DEL
T2="a $DEL"
set -- x $(echo $T1|wc -c) $(echo $T2|wc -c); shift
L1=$1; L2=$2
case "$L1/$L2" in
4/4) echo ok;;
*) echo CTLNUL bug: L1=$L1, L2=$L2;;
esac
x=$'\177'
recho "aaa${x}bbb"
recho ccc"${x}"ddd
recho eee"$x"fff
recho ggg"$(echo $x)"hhh
x=
recho "aaa${x}bbb"
recho ccc"${x}"ddd
recho eee"$x"fff
recho ggg"$(echo $x)"hhh
set -- $'\177'
recho "aaa${1}bbb"
recho ccc"${1}"ddd
recho eee"$1"fff
recho ggg"$(echo $1)"hhh
set -- ""
recho "aaa${1}bbb"
recho ccc"${1}"ddd
recho eee"$1"fff
recho ggg"$(echo $1)"hhh
recho aaa$'\177'bbb
recho ccc""ddd
recho "eeefff"
recho ggg"$(echo $'\177')"hhh
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