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cde/src/cmd/ksh93/tests/variables.sh
Martijn Dekker 33269cae61 tests/variables.sh: fix ( echo $RANDOM & ) test (re: af6a32d1)
On slower systems it could fail with an arithmetic syntax error
because the output was verified before it had been written.

Also make another test xtrace-proof.
2021-05-03 18:14:34 +01:00

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########################################################################
# #
# This software is part of the ast package #
# Copyright (c) 1982-2012 AT&T Intellectual Property #
# Copyright (c) 2020-2021 Contributors to ksh 93u+m #
# and is licensed under the #
# Eclipse Public License, Version 1.0 #
# by AT&T Intellectual Property #
# #
# A copy of the License is available at #
# http://www.eclipse.org/org/documents/epl-v10.html #
# (with md5 checksum b35adb5213ca9657e911e9befb180842) #
# #
# Information and Software Systems Research #
# AT&T Research #
# Florham Park NJ #
# #
# David Korn <dgk@research.att.com> #
# #
########################################################################
. "${SHTESTS_COMMON:-${0%/*}/_common}"
[[ ${.sh.version} == "$KSH_VERSION" ]] || err_exit '.sh.version != KSH_VERSION'
unset ss
[[ ${@ss} ]] && err_exit '${@ss} should be empty string when ss is unset'
[[ ${!ss} == ss ]] || err_exit '${!ss} should be ss when ss is unset'
[[ ${#ss} == 0 ]] || err_exit '${#ss} should be 0 when ss is unset'
# RANDOM
if (( RANDOM==RANDOM || $RANDOM==$RANDOM ))
then err_exit RANDOM variable not working
fi
# When the $RANDOM variable is used in a forked subshell, it shouldn't
# use the same pseudorandom seed as the main shell.
# https://github.com/ksh93/ksh/issues/285
RANDOM=123
function rand_print {
ulimit -t unlimited 2> /dev/null
print $RANDOM
}
integer rand1=$(rand_print)
integer rand2=$(rand_print)
(( rand1 == rand2 )) && err_exit "Test 1: \$RANDOM seed in subshell doesn't change" \
"(both results are $rand1)"
# Make sure we're actually using a different pseudorandom seed
integer rand1=$(
ulimit -t unlimited 2> /dev/null
test $RANDOM
print $RANDOM
)
integer rand2=${ print $RANDOM ;}
(( rand1 == rand2 )) && err_exit "Test 2: \$RANDOM seed in subshell doesn't change" \
"(both results are $rand1)"
# $RANDOM should be reseeded when the final command is inside of a subshell
rand1=$($SHELL -c 'RANDOM=1; (echo $RANDOM)')
rand2=$($SHELL -c 'RANDOM=1; (echo $RANDOM)')
(( rand1 == rand2 )) && err_exit "Test 3: \$RANDOM seed in subshell doesn't change" \
"(both results are $rand1)"
# $RANDOM should be reseeded for the ( simple_command & ) optimization
( echo $RANDOM & ) >r1
( echo $RANDOM & ) >r2
integer giveup=0
trap '((giveup++))' USR1
(sleep 2; kill -s USR1 $$) &
while [[ ! -s r1 || ! -s r2 ]]
do ((giveup)) && break
done
if ((giveup))
then err_exit "Test 4: ( echo $RANDOM & ) does not write output"
else [[ $(<r1) == "$(<r2)" ]] && err_exit "Test 4: \$RANDOM seed in ( simple_command & ) doesn't change" \
"(both results are $(printf %q "$(<r1)"))"
fi
kill $! 2>/dev/null
trap - USR1
unset giveup
# Virtual subshells should not influence the parent shell's RANDOM sequence
RANDOM=456
exp="$RANDOM $RANDOM $RANDOM $RANDOM $RANDOM"
RANDOM=456
got=
for((i=0; i<5; i++))
do : $( : $RANDOM $RANDOM $RANDOM )
got+=${got:+ }$RANDOM
done
[[ $got == "$exp" ]] || err_exit 'Using $RANDOM in subshell influences reproducible sequence in parent environment' \
"(expected $(printf %q "$exp"), got $(printf %q "$got"))"
# SECONDS
float secElapsed=0.0 secSleep=0.001
let SECONDS=$secElapsed
sleep $secSleep
secElapsed=SECONDS
if (( secElapsed < secSleep ))
then err_exit "slept ${secElapsed} seconds instead of ${secSleep}: " \
"either 'sleep' or \$SECONDS not working"
fi
unset -v secElapsed secSleep
# _
set abc def
if [[ $_ != def ]]
then err_exit _ variable not working
fi
# PWD
if [[ ! $PWD -ef . ]]
then err_exit PWD variable failed, not equivalent to .
fi
# PPID
exp=$$
got=${ $SHELL -c 'print $PPID'; }
if [[ ${ $SHELL -c 'print $PPID'; } != $$ ]]
then err_exit "PPID variable failed -- expected '$exp', got '$got'"
fi
# OLDPWD
old=$PWD
cd /
if [[ $OLDPWD != $old ]]
then err_exit "OLDPWD variable failed -- expected '$old', got '$OLDPWD'"
fi
cd "$old" || err_exit cd failed
# REPLY
read <<-!
foobar
!
if [[ $REPLY != foobar ]]
then err_exit REPLY variable not working
fi
integer save=$LINENO
# LINENO
LINENO=10
#
# These lines intentionally left blank
#
if (( LINENO != 13))
then err_exit LINENO variable not working
fi
LINENO=save+10
IFS=:
x=a::b::c
if [[ $x != a::b::c ]]
then err_exit "word splitting on constants"
fi
set -- $x
if [[ $# != 5 ]]
then err_exit ":: doesn't separate null arguments "
fi
set x
if x$1=0 2> /dev/null
then err_exit "x\$1=value treated as an assignment"
fi
# check for attributes across subshells
typeset -i x=3
y=1/0
if ( x=y ) 2> /dev/null
then err_exit "attributes not passed to subshells"
fi
unset x
function x.set
{
nameref foo=${.sh.name}.save
foo=${.sh.value}
.sh.value=$0
}
x=bar
if [[ $x != x.set ]]
then err_exit 'x.set does not override assignment'
fi
x.get()
{
nameref foo=${.sh.name}.save
.sh.value=$foo
}
if [[ $x != bar ]]
then err_exit 'x.get does not work correctly'
fi
typeset +n foo
unset foo
foo=bar
(
unset foo
set +u
if [[ $foo != '' ]]
then err_exit '$foo not null after unset in subsehll'
fi
)
if [[ $foo != bar ]]
then err_exit 'unset foo in subshell produces side effect '
fi
unset foo
if [[ $( { : ${foo?hi there} ; } 2>&1) != *'hi there' ]]
then err_exit '${foo?hi there} with foo unset does not print hi there on 2'
fi
x=$0
set foobar
if [[ ${@:0} != "$x foobar" ]]
then err_exit '${@:0} not expanding correctly'
fi
set --
if [[ ${*:0:1} != "$0" ]]
then err_exit '${@:0} not expanding correctly'
fi
ACCESS=0
function COUNT.set
{
(( ACCESS++ ))
}
COUNT=0
(( COUNT++ ))
if (( COUNT != 1 || ACCESS!=2 ))
then err_exit " set discipline failure COUNT=$COUNT ACCESS=$ACCESS"
fi
save_LANG=$LANG
LANG=C > /dev/null 2>&1
if [[ $LANG != C ]]
then err_exit "C locale not working"
fi
LANG=$save_LANG
if [[ $LANG != "$save_LANG" ]]
then err_exit "$save_LANG locale not working"
fi
unset -n foo
foo=junk
function foo.get
{
.sh.value=stuff
unset -f foo.get
}
if [[ $foo != stuff ]]
then err_exit "foo.get discipline not working"
fi
if [[ $foo != junk ]]
then err_exit "foo.get discipline not working after unset"
fi
# special variables
set -- 1 2 3 4 5 6 7 8 9 10
sleep 1000 &
if [[ $(print -r -- ${#10}) != 2 ]]
then err_exit '${#10}, where ${10}=10 not working'
fi
for i in @ '*' ! '#' - '?' '$'
do false
eval foo='$'$i bar='$'{$i}
if [[ ${foo} != "${bar}" ]]
then err_exit "\$$i not equal to \${$i}"
fi
command eval bar='$'{$i%?} 2> /dev/null || err_exit "\${$i%?} gives syntax error"
if [[ $i != [@*] && ${foo%?} != "$bar" ]]
then err_exit "\${$i%?} not correct"
fi
command eval bar='$'{$i#?} 2> /dev/null || err_exit "\${$i#?} gives syntax error"
if [[ $i != [@*] && ${foo#?} != "$bar" ]]
then err_exit "\${$i#?} not correct"
fi
command eval foo='$'{$i} bar='$'{#$i} || err_exit "\${#$i} gives syntax error"
if [[ $i != @([@*]) && ${#foo} != "$bar" ]]
then err_exit "\${#$i} not correct"
fi
done
kill -s 0 $! || err_exit '$! does not point to latest asynchronous process'
kill $!
unset x
cd /tmp || exit
CDPATH=/
x=$(cd ${tmp#/})
if [[ $x != $tmp ]]
then err_exit 'CDPATH does not display new directory'
fi
CDPATH=/:
x=$(cd ${tmp%/*}; cd ${tmp##*/})
if [[ $x ]]
then err_exit 'CDPATH displays new directory when not used'
fi
x=$(cd ${tmp#/})
if [[ $x != $tmp ]]
then err_exit "CDPATH ${tmp#/} does not display new directory"
fi
cd "$tmp" || exit
TMOUT=100
(TMOUT=20)
if (( TMOUT !=100 ))
then err_exit 'setting TMOUT in subshell affects parent'
fi
unset y
function setdisc # var
{
eval function $1.get'
{
.sh.value=good
}
'
}
y=bad
setdisc y
if [[ $y != good ]]
then err_exit 'setdisc function not working'
fi
integer x=$LINENO
: $'\
'
if (( LINENO != x+3 ))
then err_exit '\<newline> gets linenumber count wrong'
fi
set --
set -- "${@-}"
if (( $# !=1 ))
then err_exit '"${@-}" not expanding to null string'
fi
for i in : % + / 3b '**' '***' '@@' '{' '[' '}' !! '*a' '$foo'
do (eval : \${"$i"} 2> /dev/null) && err_exit "\${$i} not an syntax error"
done
# ___ begin: IFS tests ___
unset IFS
( IFS=' ' ; read -r a b c <<-!
x y z
!
if [[ $b ]]
then err_exit 'IFS=" " not causing adjacent space to be null string'
fi
)
read -r a b c <<-!
x y z
!
if [[ $b != y ]]
then err_exit 'IFS not restored after subshell'
fi
# The next part generates 3428 IFS set/read tests.
unset IFS x
function split
{
i=$1 s=$2 r=$3
IFS=': '
set -- $i
IFS=' '
g="[$#]"
while :
do case $# in
0) break ;;
esac
g="$g($1)"
shift
done
case "$g" in
"$s") ;;
*) err_exit "IFS=': '; set -- '$i'; expected '$s' got '$g'" ;;
esac
print "$i" | IFS=": " read arg rem; g="($arg)($rem)"
case "$g" in
"$r") ;;
*) err_exit "IFS=': '; read '$i'; expected '$r' got '$g'" ;;
esac
}
for str in \
'-' \
'a' \
'- -' \
'- a' \
'a -' \
'a b' \
'- - -' \
'- - a' \
'- a -' \
'- a b' \
'a - -' \
'a - b' \
'a b -' \
'a b c'
do
IFS=' '
set x $str
shift
case $# in
0) continue ;;
esac
f1=$1
case $f1 in
'-') f1='' ;;
esac
shift
case $# in
0) for d0 in '' ' '
do
for d1 in '' ' ' ':' ' :' ': ' ' : '
do
case $f1$d1 in
'') split "$d0$f1$d1" "[0]" "()()" ;;
' ') ;;
*) split "$d0$f1$d1" "[1]($f1)" "($f1)()" ;;
esac
done
done
continue
;;
esac
f2=$1
case $f2 in
'-') f2='' ;;
esac
shift
case $# in
0) for d0 in '' ' '
do
for d1 in ' ' ':' ' :' ': ' ' : '
do
case ' ' in
$f1$d1|$d1$f2) continue ;;
esac
for d2 in '' ' ' ':' ' :' ': ' ' : '
do
case $f2$d2 in
'') split "$d0$f1$d1$f2$d2" "[1]($f1)" "($f1)()" ;;
' ') ;;
*) split "$d0$f1$d1$f2$d2" "[2]($f1)($f2)" "($f1)($f2)" ;;
esac
done
done
done
continue
;;
esac
f3=$1
case $f3 in
'-') f3='' ;;
esac
shift
case $# in
0) for d0 in '' ' '
do
for d1 in ':' ' :' ': ' ' : '
do
case ' ' in
$f1$d1|$d1$f2) continue ;;
esac
for d2 in ' ' ':' ' :' ': ' ' : '
do
case $f2$d2 in
' ') continue ;;
esac
case ' ' in
$f2$d2|$d2$f3) continue ;;
esac
for d3 in '' ' ' ':' ' :' ': ' ' : '
do
case $f3$d3 in
'') split "$d0$f1$d1$f2$d2$f3$d3" "[2]($f1)($f2)" "($f1)($f2)" ;;
' ') ;;
*) x=$f2$d2$f3$d3
x=${x#' '}
x=${x%' '}
split "$d0$f1$d1$f2$d2$f3$d3" "[3]($f1)($f2)($f3)" "($f1)($x)"
;;
esac
done
done
done
done
continue
;;
esac
done
# BUG_KUNSETIFS: Unsetting IFS fails to activate default default field splitting if two conditions are met:
IFS='' # condition 1: no split in main shell
: ${foo-} # at least one expansion is also needed to trigger this
( # condition 2: subshell (non-forked)
unset IFS
v="one two three"
set -- $v
let "$# == 3" # without bug, should be 3
) || err_exit 'IFS fails to be unset in subshell (BUG_KUNSETIFS)'
# Test known BUG_KUNSETIFS workaround (assign to IFS before unset)
IFS= v=
: ${v:=a$'\n'bc$'\t'def\ gh}
case $(unset IFS; set -- $v; print $#) in
4 | 1) # test if the workaround works whether we've got the bug or not
v=$(IFS=foobar; unset IFS; set -- $v; print $#)
[[ $v == 4 ]] || err_exit "BUG_KUNSETIFS workaround fails (expected 4, got $v)" ;;
*) err_exit 'BUG_KUNSETIFS detection failed'
esac
# Multi-byte characters should work with $IFS
if [[ ${LC_ALL:-${LC_CTYPE:-${LANG:-}}} =~ [Uu][Tt][Ff]-?8 ]] # The multi-byte tests are pointless without UTF-8
then
# Test the following characters:
# Lowercase accented e (two bytes)
# Roman sestertius sign (four bytes)
for delim in é 𐆘; do
IFS=$delim
set : :
expect=:$delim:
actual=$*
[[ $actual == "$expect" ]] || err_exit "IFS failed with multi-byte character $delim" \
"(expected $(printf %q "$expect"), got $(printf %q "$actual"))"
read -r first second third <<< "one${delim}two${delim}three"
[[ $first == one ]] || err_exit "IFS failed with multi-byte character $delim (expected one, got $first)"
[[ $second == two ]] || err_exit "IFS failed with multi-byte character $delim (expected two, got $second)"
[[ $third == three ]] || err_exit "IFS failed with multi-byte character $delim (expected three, got $three)"
# Ensure subshells don't get corrupted when IFS becomes a multi-byte character
IFS=$' \t\n'
expect=$(printf ":$delim:\\ntrap -- 'echo end' EXIT\\nend")
actual=$(set : :; IFS=$delim; echo "$*"; trap "echo end" EXIT; trap)
[[ $actual == "$expect" ]] || err_exit "IFS in subshell failed with multi-byte character $delim" \
"(expected $(printf %q "$expect"), got $(printf %q "$actual"))"
done
# Multibyte characters with the same initial byte shouldn't be parsed as the same
# character if they are different. The regression test below tests two characters
# with the same initial byte (0xC2).
IFS='£' # £ = C2 A3
v='abc§def ghi§jkl' # § = C2 A7 (same initial byte)
set -- $v
v="${#},${1-},${2-},${3-}"
[[ $v == '1,abc§def ghi§jkl,,' ]] || err_exit "IFS treats £ (C2 A3) and § (C2 A7) as the same character"
fi
# Ensure fallback to first byte if IFS doesn't start with a valid multibyte character
# (however, this test should pass regardless of the locale)
IFS=$'\x[A0]a'
set : :
expect=$':\x[A0]:'
actual=$*
[[ $actual == "$expect" ]] || err_exit "IFS failed with invalid multi-byte character" \
"(expected $(printf %q "$expect"), got $(printf %q "$actual"))"
# ^^^ end: IFS tests ^^^
# restore default split:
unset IFS
if [[ $( (print ${12345:?}) 2>&1) != *12345* ]]
then err_exit 'incorrect error message with ${12345?}'
fi
unset foobar
if [[ $( (print ${foobar:?}) 2>&1) != *foobar* ]]
then err_exit 'incorrect error message with ${foobar?}'
fi
unset bar
if [[ $( (print ${bar:?bam}) 2>&1) != *bar*bam* ]]
then err_exit 'incorrect error message with ${foobar?}'
fi
{ $SHELL -c '
function foo
{
typeset SECONDS=0
sleep 0.002
print $SECONDS
}
x=$(foo)
(( x >= 0.002 && x < 1 ))
'
} 2> /dev/null || err_exit 'SECONDS not working in function'
cat > $tmp/script <<-\!
posixfun()
{
unset x
nameref x=$1
print -r -- "$x"
}
function fun
{
nameref x=$1
print -r -- "$x"
}
if [[ $1 ]]
then file=${.sh.file}
else print -r -- "${.sh.file}"
fi
!
chmod +x $tmp/script
. $tmp/script 1
[[ $file == $tmp/script ]] || err_exit ".sh.file not working for dot scripts"
[[ $($SHELL $tmp/script) == $tmp/script ]] || err_exit ".sh.file not working for scripts"
[[ $(posixfun .sh.file) == $tmp/script ]] || err_exit ".sh.file not working for posix functions"
[[ $(fun .sh.file) == $tmp/script ]] || err_exit ".sh.file not working for functions"
[[ $(posixfun .sh.fun) == posixfun ]] || err_exit ".sh.fun not working for posix functions"
[[ $(fun .sh.fun) == fun ]] || err_exit ".sh.fun not working for functions"
[[ $(posixfun .sh.subshell) == 1 ]] || err_exit ".sh.subshell not working for posix functions"
[[ $(fun .sh.subshell) == 1 ]] || err_exit ".sh.subshell not working for functions"
(
[[ $(posixfun .sh.subshell) == 2 ]] || err_exit ".sh.subshell not working for posix functions in subshells"
[[ $(fun .sh.subshell) == 2 ]] || err_exit ".sh.subshell not working for functions in subshells"
(( .sh.subshell == 1 )) || err_exit ".sh.subshell not working in a subshell"
)
TIMEFORMAT='this is a test'
[[ $(set +x; { { time :;} 2>&1;}) == "$TIMEFORMAT" ]] || err_exit 'TIMEFORMAT not working'
alias _test_alias=true
: ${.sh.version}
[[ $(alias _test_alias) == *.sh.* ]] && err_exit '.sh. prefixed to alias name'
: ${.sh.version}
[[ $(whence rm) == *.sh.* ]] && err_exit '.sh. prefixed to tracked alias name'
: ${.sh.version}
[[ $(cd /bin;env | grep PWD=) == *.sh.* ]] && err_exit '.sh. prefixed to PWD'
# unset discipline bug fix
dave=dave
function dave.unset
{
unset dave
}
unset dave
[[ $(typeset +f) == *dave.* ]] && err_exit 'unset discipline not removed'
x=$(
dave=dave
function dave.unset
{
print dave.unset
}
)
[[ $x == dave.unset ]] || err_exit 'unset discipline not called with subset completion'
print 'print ${VAR}' > $tmp/script
unset VAR
VAR=new $tmp/script > $tmp/out
got=$(<$tmp/out)
[[ $got == new ]] || err_exit "previously unset environment variable not passed to script, expected 'new', got '$got'"
[[ ! $VAR ]] || err_exit "previously unset environment variable set after script, expected '', got '$VAR'"
unset VAR
VAR=old
VAR=new $tmp/script > $tmp/out
got=$(<$tmp/out)
[[ $got == new ]] || err_exit "environment variable covering local variable not passed to script, expected 'new', got '$got'"
[[ $VAR == old ]] || err_exit "previously set local variable changed after script, expected 'old', got '$VAR'"
unset VAR
export VAR=old
VAR=new $tmp/script > $tmp/out
got=$(<$tmp/out)
[[ $got == new ]] || err_exit "environment variable covering environment variable not passed to script, expected 'new', got '$got'"
[[ $VAR == old ]] || err_exit "previously set environment variable changed after script, expected 'old', got '$VAR'"
(
unset dave
function dave.append
{
.sh.value+=$dave
dave=
}
dave=foo; dave+=bar
[[ $dave == barfoo ]] || exit 2
) 2> /dev/null
case $? in
0) ;;
1) err_exit 'append discipline not implemented';;
*) err_exit 'append discipline not working';;
esac
.sh.foobar=hello
{
function .sh.foobar.get
{
.sh.value=world
}
} 2> /dev/null || err_exit "cannot add get discipline to .sh.foobar"
[[ ${.sh.foobar} == world ]] || err_exit 'get discipline for .sh.foobar not working'
[[ -o xtrace ]] && opt_x=-x || opt_x=+x
x='a|b'
IFS='|'
set -- $x
[[ $2 == b ]] || err_exit '$2 should be b after set'
exec 3>&2 2> /dev/null
set -x
( IFS= ) 2> /dev/null
set "$opt_x"
exec 2>&3-
set -- $x
[[ $2 == b ]] || err_exit '$2 should be b after subshell'
: & pid=$!
( : & )
[[ $pid == $! ]] || err_exit '$! value not preserved across subshells'
pid=$!
{ : & } >&2
[[ $pid == $! ]] && err_exit '$! value not updated after bg job in braces+redir'
pid=$!
{ : |& } >&2
[[ $pid == $! ]] && err_exit '$! value not updated after co-process in braces+redir'
unset foo
typeset -A foo
function foo.set
{
case ${.sh.subscript} in
bar) if ((.sh.value > 1 ))
then .sh.value=5
foo[barrier_hit]=yes
fi
;;
barrier_hit)
if [[ ${.sh.value} == yes ]]
then foo[barrier_not_hit]=no
else foo[barrier_not_hit]=yes
fi
;;
esac
}
foo[barrier_hit]=no
foo[bar]=1
(( foo[bar] == 1 )) || err_exit 'foo[bar] should be 1'
[[ ${foo[barrier_hit]} == no ]] || err_exit 'foo[barrier_hit] should be no'
[[ ${foo[barrier_not_hit]} == yes ]] || err_exit 'foo[barrier_not_hit] should be yes'
foo[barrier_hit]=no
foo[bar]=2
(( foo[bar] == 5 )) || err_exit 'foo[bar] should be 5'
[[ ${foo[barrier_hit]} == yes ]] || err_exit 'foo[barrier_hit] should be yes'
[[ ${foo[barrier_not_hit]} == no ]] || err_exit 'foo[barrier_not_hit] should be no'
unset x
typeset -i x
function x.set
{
typeset sub=${.sh.subscript}
(( sub > 0 )) && (( x[sub-1]= x[sub-1] + .sh.value ))
}
x[0]=0 x[1]=1 x[2]=2 x[3]=3
[[ ${x[@]} == '12 8 5 3' ]] || err_exit 'set discipline for indexed array not working correctly'
float seconds
((SECONDS=3*4))
seconds=SECONDS
(( seconds < 12 || seconds > 12.1 )) && err_exit "SECONDS is $seconds and should be close to 12"
unset a
function a.set
{
print -r -- "${.sh.name}=${.sh.value}"
}
[[ $(a=1) == a=1 ]] || err_exit 'set discipline not working in subshell assignment'
[[ $(a=1 :) == a=1 ]] || err_exit 'set discipline not working in subshell command'
[[ ${.sh.subshell} == 0 ]] || err_exit '${.sh.subshell} should be 0'
(
[[ ${.sh.subshell} == 1 ]] || err_exit '${.sh.subshell} should be 1'
(
[[ ${.sh.subshell} == 2 ]] || err_exit '${.sh.subshell} should be 2'
exit $Errors
)
)
Errors=$? # ensure error count survives subshell
actual=$(
{
(
echo ${.sh.subshell} | cat # left element of pipe should increase ${.sh.subshell}
echo ${.sh.subshell}
ulimit -t unlimited 2>/dev/null # fork
echo ${.sh.subshell} # should be same after forking existing virtual subshell
)
echo ${.sh.subshell} # a background job should also increase ${.sh.subshell}
} & wait "$!"
echo ${.sh.subshell}
)
expect=$'4\n3\n3\n2\n1'
[[ $actual == "$expect" ]] || err_exit "\${.sh.subshell} failure (expected $(printf %q "$expect"), got $(printf %q "$actual"))"
# ${.sh.subshell} should increment when the final command is inside of a subshell
exp=1
got=$($SHELL -c '(echo ${.sh.subshell})')
[[ $exp == $got ]] || err_exit '${.sh.subshell} fails to increment when the final command is inside of a subshell' \
"(expected '$exp', got '$got')"
unset IFS
if ((SHOPT_BRACEPAT)) && command set -o braceexpand
then set -- {1..32768}
else set -- $(awk 'BEGIN { for(i=1;i<=32768;i++) print i; }')
fi
(( $# == 32768 )) || err_exit "\$# failed -- expected 32768, got $#"
set --
unset r v x
(
x=foo
for v in EDITOR VISUAL OPTIND CDPATH FPATH PATH ENV RANDOM SECONDS _ LINENO
do nameref r=$v
unset $v
if ( $SHELL -c "unset $v; : \$$v" ) 2>/dev/null
then [[ $r ]] && err_exit "unset $v failed -- expected '', got '$r'"
r=$x
[[ $r == $x ]] || err_exit "$v=$x failed -- expected '$x', got '$r'"
else err_exit "unset $v; : \$$v failed"
fi
done
exit $Errors
)
Errors=$? # ensure error count survives subshell
(
# $x must be an unknown locale.
for x in x x.b@d xx_XX xx_XX.b@d
do errmsg=$({ LANG=$x; } 2>&1)
[[ -n $errmsg ]] && break
done
if [[ -z $errmsg ]]
then warning "C library does not seem to verify locales: skipping LC_* tests"
exit $Errors
fi
for v in LC_ALL LC_CTYPE LC_MESSAGES LC_COLLATE LC_NUMERIC LC_TIME
do nameref r=$v
unset $v
[[ $r ]] && err_exit "unset $v failed -- expected '', got '$r'"
d=$($SHELL -c "$v=$x" 2>&1)
[[ $d ]] || err_exit "$v=$x failed -- expected locale diagnostic"
{ g=$( r=$x; print -- $r ); } 2>/dev/null
[[ $g == '' ]] || err_exit "$v=$x failed -- expected '', got '$g'"
{ g=$( r=C; r=$x; print -- $r ); } 2>/dev/null
[[ $g == 'C' ]] || err_exit "$v=C; $v=$x failed -- expected 'C', got '$g'"
done
exit $Errors
)
Errors=$? # ensure error count survives subshell
print print -n zzz > zzz
chmod +x zzz
exp='aaazzz'
got=$($SHELL -c 'unset SHLVL; print -n aaa; ./zzz' 2>&1) >/dev/null 2>&1
[[ $got == "$exp" ]] || err_exit "unset SHLVL causes script failure -- expected '$exp', got '$got'"
mkdir glean
for cmd in date ok
do exp="$cmd ok"
rm -f $cmd
print print $exp > glean/$cmd
chmod +x glean/$cmd
got=$(set +x; CDPATH=:.. $SHELL -c "command -p date > /dev/null; cd glean && ./$cmd" 2>&1)
[[ $got == "$exp" ]] || err_exit "cd with CDPATH after PATH change failed -- expected '$exp', got '$got'"
done
v=LC_CTYPE
unset $v
[[ -v $v ]] && err_exit "unset $v; [[ -v $v ]] failed"
eval $v=C
[[ -v $v ]] || err_exit "$v=C; [[ -v $v ]] failed"
cmd='set --nounset; unset foo; : ${!foo*}'
$SHELL -c "$cmd" 2>/dev/null || err_exit "'$cmd' exit status $?, expected 0"
SHLVL=1
level=$($SHELL -c $'$SHELL -c \'print -r "$SHLVL"\'')
[[ $level == 3 ]] || err_exit "SHLVL should be 3 not $level"
[[ $($SHELL -c '{ x=1; : ${x.};print ok;}' 2> /dev/null) == ok ]] || err_exit '${x.} where x is a simple variable causes shell to abort'
$SHELL -c 'unset .sh' 2> /dev/null
[[ $? == 1 ]] || err_exit 'unset .sh should return 1'
#'
# ======
# ${var+set} within a loop.
_test_isset() { eval "
$1=initial_value
function _$1_test {
typeset $1 # make local and initially unset
for i in 1 2 3 4 5; do
case \${$1+s} in
( s ) print -n 'S'; unset -v $1 ;;
( '' ) print -n 'U'; $1='' ;;
esac
done
}
_$1_test
[[ -n \${$1+s} && \${$1} == initial_value ]] || exit
for i in 1 2 3 4 5; do
case \${$1+s} in
( s ) print -n 's'; unset -v $1 ;;
( '' ) print -n 'u'; $1='' ;;
esac
done
"; }
expect='USUSUsusus'
actual=$(_test_isset var)
[[ "$actual" = "$expect" ]] || err_exit "\${var+s} expansion fails in loops (expected '$expect', got '$actual')"
actual=$(_test_isset IFS)
[[ "$actual" = "$expect" ]] || err_exit "\${IFS+s} expansion fails in loops (expected '$expect', got '$actual')"
# [[ -v var ]] within a loop.
_test_v() { eval "
$1=initial_value
function _$1_test {
typeset $1 # make local and initially unset
for i in 1 2 3 4 5; do
if [[ -v $1 ]]
then print -n 'S'; unset -v $1
else print -n 'U'; $1=''
fi
done
}
_$1_test
[[ -v $1 && \${$1} == initial_value ]] || exit
for i in 1 2 3 4 5; do
if [[ -v $1 ]]
then print -n 's'; unset -v $1
else print -n 'u'; $1=''
fi
done
"; }
expect='USUSUsusus'
actual=$(_test_v var)
[[ "$actual" = "$expect" ]] || err_exit "[[ -v var ]] command fails in loops (expected '$expect', got '$actual')"
actual=$(_test_v IFS)
[[ "$actual" = "$expect" ]] || err_exit "[[ -v IFS ]] command fails in loops (expected '$expect', got '$actual')"
# ======
# Verify that importing untrusted environment variables does not allow evaluating
# arbitrary expressions, but does recognize all integer literals recognized by ksh.
expect=8
actual=$(env SHLVL='7' "$SHELL" -c 'echo $SHLVL')
[[ $actual == $expect ]] || err_exit "decimal int literal not recognized (expected '$expect', got '$actual')"
expect=14
actual=$(env SHLVL='013' "$SHELL" -c 'echo $SHLVL')
[[ $actual == $expect ]] || err_exit "leading zeros int literal not recognized (expected '$expect', got '$actual')"
expect=4
actual=$(env SHLVL='2#11' "$SHELL" -c 'echo $SHLVL')
[[ $actual == $expect ]] || err_exit "base#value int literal not recognized (expected '$expect', got '$actual')"
expect=12
actual=$(env SHLVL='16#B' "$SHELL" -c 'echo $SHLVL')
[[ $actual == $expect ]] || err_exit "base#value int literal not recognized (expected '$expect', got '$actual')"
expect=1
actual=$(env SHLVL="2#11+x[\$(env echo Exploited vuln CVE-2019-14868 >&2)0]" "$SHELL" -c 'echo $SHLVL' 2>&1)
[[ $actual == $expect ]] || err_exit "expression allowed on env var import (expected '$expect', got '$actual')"
# ======
# Check unset, attribute and cleanup/restore behavior of special variables.
# Keep the list in sync (minus ".sh") with shtab_variables[] in src/cmd/ksh93/data/variables.c
set -- \
"PATH" \
"PS1" \
"PS2" \
"IFS" \
"PWD" \
"HOME" \
"MAIL" \
"REPLY" \
"SHELL" \
"EDITOR" \
"MAILCHECK" \
"RANDOM" \
"ENV" \
"HISTFILE" \
"HISTSIZE" \
"HISTEDIT" \
"HISTCMD" \
"FCEDIT" \
"CDPATH" \
"MAILPATH" \
"PS3" \
"OLDPWD" \
"VISUAL" \
"COLUMNS" \
"LINES" \
"PPID" \
"_" \
"TMOUT" \
"SECONDS" \
"LINENO" \
"OPTARG" \
"OPTIND" \
"PS4" \
"FPATH" \
"LANG" \
"LC_ALL" \
"LC_COLLATE" \
"LC_CTYPE" \
"LC_MESSAGES" \
"LC_NUMERIC" \
"LC_TIME" \
"FIGNORE" \
"KSH_VERSION" \
"JOBMAX" \
".sh.edchar" \
".sh.edcol" \
".sh.edtext" \
".sh.edmode" \
".sh.name" \
".sh.subscript" \
".sh.value" \
".sh.version" \
".sh.dollar" \
".sh.match" \
".sh.command" \
".sh.file" \
".sh.fun" \
".sh.lineno" \
".sh.subshell" \
".sh.level" \
".sh.stats" \
".sh.math" \
".sh.pool" \
".sh.pid" \
".sh.tilde" \
"SHLVL" \
"CSWIDTH"
# ... unset
$SHELL -c '
errors=0
unset -v "$@" || let errors++
for var
do if [[ $var != "_" ]] && # only makes sense that $_ is immediately set again
{ [[ -v $var ]] || eval "[[ -n \${$var+s} ]]"; }
then echo " $0: special variable $var still set" >&2
let errors++
elif eval "[[ -n \${$var} ]]"
then echo " $0: special variable $var has value, though unset" >&2
let errors++
fi
done
exit $((errors + 1)) # a possible erroneous asynchronous fork would cause exit status 0
' unset_test "$@"
(((e = $?) == 1)) || err_exit "Failure in unsetting one or more special variables" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ... unset in virtual subshell inside of nested function
$SHELL -c '
errors=0
fun1()
{
fun2()
{
(
unset -v "$@" || let errors++
for var
do if [[ $var != "_" ]] && # only makes sense that $_ is immediately set again
{ [[ -v $var ]] || eval "[[ -n \${$var+s} ]]"; }
then echo " $0: special variable $var still set" >&2
let errors++
elif eval "[[ -n \${$var} ]]"
then echo " $0: special variable $var has value, though unset" >&2
let errors++
fi
done
exit $errors
) || errors=$?
}
fun2 "$@"
}
fun1 "$@"
exit $((errors + 1)) # a possible erroneous asynchronous fork would cause exit status 0
' unset_subsh_fun_test "$@"
(((e = $?) == 1)) || err_exit "Unset of special variable(s) in a virtual subshell within a nested function fails" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ... readonly in subshell
$SHELL -c '
errors=0
(
readonly "$@"
for var
do if (eval "$var=") 2>/dev/null
then echo " $0: special variable $var not made readonly in subshell" >&2
let errors++
fi
done
exit $errors
) || errors=$?
for var
do if ! (eval "$var=")
then echo " $0: special variable $var still readonly outside subshell" >&2
let errors++
fi
done
exit $((errors + 1)) # a possible erroneous asynchronous fork would cause exit status 0
' readonly_test "$@"
(((e = $?) == 1)) || err_exit "Failure in making one or more special variables readonly in a subshell" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ... subshell leak test
$SHELL -c '
errors=0
for var
do if [[ $var == .sh.level ]]
then continue # known to fail
fi
if eval "($var=bug); [[ \${$var} == bug ]]" 2>/dev/null
then echo " $0: special variable $var leaks out of subshell" >&2
let errors++
fi
done
exit $((errors + 1))
' subshell_leak_test "$@"
(((e = $?) == 1)) || err_exit "One or more special variables leak out of a subshell" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ... upper/lowercase test
$SHELL -c '
typeset -u upper
typeset -l lower
errors=0
PS1=/dev/null/test_my_case_too
PS2=$PS1 PS3=$PS1 PS4=$PS1 OPTARG=$PS1 IFS=$PS1 FPATH=$PS1 FIGNORE=$PS1 CSWIDTH=$PS1
for var
do case $var in
RANDOM | HISTCMD | _ | SECONDS | LINENO | JOBMAX | .sh.stats)
# these are expected to fail below as their values change; just test against crashing
typeset -u "$var"
typeset -l "$var"
continue ;;
esac
nameref val=$var
upper=$val
lower=$val
typeset -u "$var"
if [[ $val != "$upper" ]]
then echo " $0: typeset -u does not work on special variable $var" \
"(expected $(printf %q "$upper"), got $(printf %q "$val"))" >&2
let errors++
fi
typeset -l "$var"
if [[ $val != "$lower" ]]
then echo " $0: typeset -l does not work on special variable $var" \
"(expected $(printf %q "$lower"), got $(printf %q "$val"))" >&2
let errors++
fi
done
exit $((errors + 1))
' changecase_test "$@"
(((e = $?) == 1)) || err_exit "typeset -l/-u doesn't work on special variables" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ... unset followed by launching a forked subshell
$SHELL -c '
errors=0
unset -v "$@" || let errors++
(
ulimit -t unlimited 2>/dev/null
for var do
[[ $var == _ ]] && continue # only makes sense that $_ is immediately set again
[[ -v $var ]] && let errors++
done
exit $((errors + 1))
)
exit $?
' unset_to_fork_test "$@"
(((e = $?) == 1)) || err_exit "Failure in unsetting one or more special variables followed by launching forked subshell" \
"(exit status $e$( ((e>128)) && print -n / && kill -l "$e"))"
# ======
# ${.sh.pid} should be the forked subshell's PID
(
ulimit -t unlimited 2>/dev/null # fork the subshell
[[ ${.sh.pid} == $$ ]]
) && err_exit "\${.sh.pid} is the same as \$$ (both are $$)"
# ${.sh.pid} should be the PID of the running job
echo ${.sh.pid} > "$tmp/jobpid" &
wait
[[ $(cat "$tmp/jobpid") == ${.sh.pid} ]] && err_exit "\${.sh.pid} is not set to a job's PID (expected $!, got $(cat "$tmp/jobpid"))"
# ${.sh.pid} should be the same as $$ in the parent shell
[[ $$ == ${.sh.pid} ]] || err_exit "\${.sh.pid} and \$$ differ in the parent shell (expected $$, got ${.sh.pid})"
# ======
# Parentheses after the '-', '+', '=', and '?' expansion operators were causing syntax errors.
# Check both the unset variable case and the set variable case for each set of symbols.
unset -v foo
for op in - :- = :=
do for word in '(word)' 'w(or)d' '(wor)d' 'w(ord)' 'w(ord' 'wor)d'
do exp=$(set +x; eval "echo \${foo${op}${word}}" 2>&1)
if [[ $exp != "$word" ]]
then err_exit "\${foo${op}${word}} when foo is not set: expected \"$word\", got \"$exp\""
fi
done
done
foo=some_value
for op in - :- = := \? :\?
do for word in '(word)' 'w(or)d' '(wor)d' 'w(ord)' 'w(ord' 'wor)d'
do exp=$(set +x; eval "echo \${foo${op}${word}}" 2>&1)
if [[ $exp != "$foo" ]]
then err_exit "\${foo${op}${word}} when foo is set: expected \"$foo\", got \"$exp\""
fi
done
done
unset -v foo
for op in + :+
do for word in '(word)' 'w(or)d' '(wor)d' 'w(ord)' 'w(ord' 'wor)d'
do exp=$(set +x; eval "echo \${foo${op}${word}}" 2>&1)
if [[ $exp != "" ]]
then err_exit "\${foo${op}${word}} when foo is not set: expected null, got \"$exp\""
fi
done
done
unset -v foo
for op in \? :\?
do for word in '(word)' 'w(or)d' '(wor)d' 'w(ord)' 'w(ord' 'wor)d'
do exp=$(set +x; eval "echo \${foo${op}${word}}" 2>&1)
if [[ $exp != *": foo: $word" ]]
then err_exit "\${foo${op}${word}} when foo is not set: expected *\": foo: $word\", got \"$exp\""
fi
done
done
# ======
# https://bugzilla.redhat.com/1147645
case $'\n'$(env 'BASH_FUNC_a%%=() { echo test; }' "$SHELL" -c set) in
*$'\nBASH_FUNC_a%%='* )
err_exit 'ksh imports environment variables with invalid names' ;;
esac
# ======
# Autoloading a function caused $LINENO to be off by the # of lines in the function definition file.
# https://github.com/ksh93/ksh/issues/116
cd "$tmp" || exit 128
cat >lineno_autoload <<'EOF'
echo "begin: main script \$LINENO == $LINENO"
function main_script_fn
{
lineno_autoload_fn
(: ${bad\subst\in\main_script_fn\on\line\5})
}
main_script_fn
(eval 'syntax error(')
(: ${bad\subst\in\main\script\on\line\9})
echo "end: main script \$LINENO == $LINENO"
EOF
cat >lineno_autoload_fn <<'EOF'
function lineno_autoload_fn
{
echo "Hi, I'm a function! On line 3, my \$LINENO is $LINENO"
(: ${bad\subst\in\function\on\line\4})
(eval 'syntax error(')
echo "Hi, I'm still a function! On line 6, my \$LINENO is $LINENO"
}
echo "In definition file, outside function: \$LINENO on line 8 is $LINENO"
: ${bad\subst\in\def\file\on\line\9}
EOF
exp="begin: main script \$LINENO == 1
In definition file, outside function: \$LINENO on line 8 is 8
./lineno_autoload[7]: main_script_fn: line 9: \${bad\subst\in\def\file\on\line\9}: bad substitution
Hi, I'm a function! On line 3, my \$LINENO is 3
./lineno_autoload[7]: main_script_fn[4]: lineno_autoload_fn: line 4: \${bad\subst\in\function\on\line\4}: bad substitution
./lineno_autoload[7]: main_script_fn[4]: lineno_autoload_fn[5]: eval: syntax error at line 1: \`(' unexpected
Hi, I'm still a function! On line 6, my \$LINENO is 6
./lineno_autoload[7]: main_script_fn: line 5: \${bad\subst\in\main_script_fn\on\line\5}: bad substitution
./lineno_autoload[8]: eval: syntax error at line 1: \`(' unexpected
./lineno_autoload: line 9: \${bad\subst\in\main\script\on\line\9}: bad substitution
end: main script \$LINENO == 10"
got=$(set +x; FPATH=$tmp "$SHELL" ./lineno_autoload 2>&1)
[[ $got == "$exp" ]] || err_exit 'Regression in $LINENO and/or error messages.' \
$'Diff follows:\n'"$(diff -u <(print -r -- "$exp") <(print -r -- "$got") | sed $'s/^/\t| /')"
# ======
# Before 2021-02-26, the DEBUG trap corrupted ${.sh.fun}
unset .sh.fun
got=$(some_func() { :; }; trap some_func DEBUG; trap - DEBUG; print -r "${.sh.fun}")
[[ -z $got ]] || err_exit "\${.sh.fun} leaks out of DEBUG trap (got $(printf %q "$got"))"
# =====
# Before 2021-03-06, ${foo=bar} and ${foo:=bar} did not work if `foo` had a numeric type
# https://github.com/ksh93/ksh/issues/157
# https://github.com/ksh93/ksh/pull/211#issuecomment-792336825
unset a b
typeset -i a
b=3+39
got=${a=b}
[[ $got == 42 ]] || err_exit "\${a=b}: expansion not working for integer type (expected '42', got '$got')"
[[ $a == 42 ]] || err_exit "\${a=b}: a was not assigned the correct integer value (expected '42', got '$a')"
unset a b
typeset -si a
b=3+39
got=${a=b}
[[ $got == 42 ]] || err_exit "\${a=b}: expansion not working for short integer type (expected '42', got '$got')"
[[ $a == 42 ]] || err_exit "\${a=b}: a was not assigned the correct short integer value (expected '42', got '$a')"
unset a b
typeset -F a
b=3.75+38.25
got=${a=b}
exp=42.0000000000
[[ $got == "$exp" ]] || err_exit "\${a=b}: expansion not working for float type (expected '$exp', got '$got')"
[[ $a == "$exp" ]] || err_exit "\${a=b}: a was not assigned the correct float value (expected '$exp', got '$a')"
unset a b
typeset -i a
b=3+39
got=${a:=b}
[[ $got == 42 ]] || err_exit "\${a:=b}: expansion not working for integer type (expected '42', got '$got')"
[[ $a == 42 ]] || err_exit "\${a:=b}: a was not assigned the correct integer value (expected '42', got '$a')"
unset a b
typeset -si a
b=3+39
got=${a:=b}
[[ $got == 42 ]] || err_exit "\${a:=b}: expansion not working for short integer type (expected '42', got '$got')"
[[ $a == 42 ]] || err_exit "\${a:=b}: a was not assigned the correct short integer value (expected '42', got '$a')"
unset a b
typeset -F a
b=3.75+38.25
got=${a:=b}
exp=42.0000000000
[[ $got == "$exp" ]] || err_exit "\${a:=b}: expansion not working for float type (expected '$exp', got '$got')"
[[ $a == "$exp" ]] || err_exit "\${a:=b}: a was not assigned the correct float value (expected '$exp', got '$a')"
# ======
# ${!FOO@} and ${!FOO*} expansions did not include FOO itself
# https://github.com/ksh93/ksh/issues/183
unset foo "${!foo@}"
exp='foo foobar fool'
got=$(IFS=/; foo=bar foobar=fbar fool=pity; print -r -- "${!foo@}")
[[ $got == "$exp" ]] || err_exit "\${!foo@}: expected $(printf %q "$exp"), got $(printf %q "$got")"
exp='foo/foobar/fool'
got=$(IFS=/; foo=bar foobar=fbar fool=pity; print -r -- "${!foo*}")
[[ $got == "$exp" ]] || err_exit "\${!foo*}: expected $(printf %q "$exp"), got $(printf %q "$got")"
# ======
# In ksh93v- ${.sh.subshell} is unset by the $PS4 prompt
# https://github.com/att/ast/issues/1092
exp='0'
got="$($SHELL -c 'PS4="${.sh.subshell}"; echo ${.sh.subshell}')"
[[ "$exp" == "$got" ]] || err_exit "\${.sh.subshell} is wrongly unset in the \$PS4 prompt" \
"(expected $(printf %q "$exp"), got $(printf %q "$got"))"
# ======
# Corruption of SECONDS on leaving virtual subshell
# https://github.com/ksh93/ksh/issues/253#issuecomment-815191052
osec=$SECONDS
(SECONDS=20)
nsec=$SECONDS
if ((nsec<osec || nsec>osec+0.1))
then err_exit "SECONDS corrupted after leaving virtual subshell (expected $osec, got $nsec)"
fi
# Corruption of LINENO on leaving virtual subshell
lineno_subshell=$tmp/lineno_subshell.sh
cat >| "$lineno_subshell" << 'EOF'
(
unset LINENO
:
)
echo $LINENO
EOF
exp=5
got=$($SHELL "$lineno_subshell")
[[ $exp == $got ]] || err_exit "LINENO corrupted after leaving virtual subshell (expected $exp, got $got)"
# ======
# Check if ${.sh.file} is set to correct value after sourcing a file
# https://github.com/att/ast/issues/472
cat > $tmp/foo.sh <<EOF
echo "foo"
EOF
. $tmp/foo.sh > /dev/null
[[ ${.sh.file} == $0 ]] || err_exit "\${.sh.file} is not set to the correct value after sourcing a file"
# ======
exit $((Errors<125?Errors:125))