Regression test suite: get rid of unportable 'mktemp -dt'

The regression test suite used 'mktemp -dt' to create temporary
directories, but that is not portable, e.g. it does not work on
macOS, FreebSD or NetBSD. Installing a compatible 'mktemp' in
another location in $PATH did not work either, as the regression
test suite resets $PATH.

src/cmd/ksh93/tests/*:
- Replace many uses of 'mktemp -dt' by a portable and reasonably
  safe way to create a temporary directory.

(cherry picked from commit 71f4c43703e3eff034009b4c8f4110bd32f4e209)

src/cmd/ksh93/tests/alias.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.alias.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 alias foo='print hello'
 if	[[ $(foo) != hello ]]

src/cmd/ksh93/tests/arith.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.arith.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 trap '' FPE # NOTE: osf.alpha requires this (no ieee math)
 

src/cmd/ksh93/tests/arrays.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.arrays.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 function fun
 {

src/cmd/ksh93/tests/attributes.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.attributes.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 r=readonly u=Uppercase l=Lowercase i=22 i8=10 L=abc L5=def uL5=abcdef xi=20
 x=export t=tagged H=hostname LZ5=026 RZ5=026 Z5=123 lR5=ABcdef R5=def n=l

src/cmd/ksh93/tests/basic.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.basic.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 # test basic file operations like redirection, pipes, file expansion
 set -- \

src/cmd/ksh93/tests/bracket.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.bracket.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 null=''
 if	[[ ! -z $null ]]

src/cmd/ksh93/tests/builtins.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.builtins.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 # test shell builtin commands
 builtin getconf
@@ -187,7 +193,7 @@ mkdir -p $tmp/a/b/c 2>/dev/null || err_exit  "mkdir -p failed"
 $SHELL -c "cd $tmp/a/b; cd c" 2>/dev/null || err_exit "initial script relative cd fails"
 
 trap 'print TERM' TERM
-exp=$'trap -- \'print TERM\' TERM\ntrap -- \'cd /; rm -rf '$tmp$'\' EXIT'
+exp=$'trap -- \'print TERM\' TERM\ntrap -- \'cd / && rm -rf "$tmp"\' EXIT'
 got=$(trap)
 [[ $got == $exp ]] || err_exit "\$(trap) failed -- expected \"$exp\", got \"$got\""
 exp='print TERM'

src/cmd/ksh93/tests/coprocess.sh

@@ -29,8 +29,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.coprocess.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 if	[[ -d /cygdrive ]]
 then	err_exit cygwin detected - coprocess tests disabled - enable at the risk of wedging your system

src/cmd/ksh93/tests/exit.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.exit.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 function abspath
 {

src/cmd/ksh93/tests/functions.sh

@@ -33,8 +33,14 @@ read -n4 c < $0 2> /dev/null
 
 ulimit -c 0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.functions.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 integer foo=33
 bar=bye

src/cmd/ksh93/tests/glob.sh

@@ -27,8 +27,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer aware=0 contrary=0 Errors=0 ignorant=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.glob.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 function test_glob
 {

src/cmd/ksh93/tests/grep.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.grep.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 function grep
 {

src/cmd/ksh93/tests/heredoc.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.heredoc.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 f=$tmp/here1
 g=$tmp/here2

src/cmd/ksh93/tests/io.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.io.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 unset HISTFILE
 

src/cmd/ksh93/tests/locale.sh

@@ -30,8 +30,14 @@ integer Errors=0
 
 unset LANG ${!LC_*}
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.locale.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 cd $tmp || exit
 
 a=$($SHELL -c '/' 2>&1 | sed -e "s,.*: *,," -e "s, *\[.*,,")

src/cmd/ksh93/tests/math.sh

@@ -34,8 +34,14 @@ set -o nounset
 typeset tmp
 
 # create temporary test directory
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.math.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 cd $tmp || exit
 
 function test_arithmetric_expression_accesss_array_element_through_nameref

src/cmd/ksh93/tests/nameref.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.nameref.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 function checkref
 {

src/cmd/ksh93/tests/namespace.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.namespace.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 foo=abc
 typeset -C bar=(x=3 y=4 t=7)

src/cmd/ksh93/tests/options.sh

@@ -33,8 +33,14 @@ export LC_ALL=C ENV=
 
 ulimit -c 0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.options.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 if	[[ $( ${SHELL-ksh} -s hello<<-\!
 		print $1

src/cmd/ksh93/tests/path.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.path.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 cd $tmp || exit
 type /xxxxxx > out1 2> out2

src/cmd/ksh93/tests/readcsv.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.readcsv.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 	
 tmp1=$tmp/tmp1.csv
 tmp2=$tmp/tmp2.csv

src/cmd/ksh93/tests/restricted.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.restricted.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 # test restricted shell
 pwd=$PWD

src/cmd/ksh93/tests/return.sh

@@ -30,8 +30,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.return.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 unset HISTFILE
 

src/cmd/ksh93/tests/select.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.select.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 PS3='ABC '
 

src/cmd/ksh93/tests/shtests

@@ -275,8 +275,14 @@ then	s=${SHELL:##*sh}
 fi
 if	(( compile ))
 then	if	whence $SHCOMP > /dev/null
-	then	tmp=$(mktemp -dt) || { echo mktemp -dt failed >&2; exit 1; }
+	then	tmp=$(
-		trap "cd /; rm -rf $tmp" EXIT
+			d=${TMPDIR:-/tmp}/ksh93.shtests.$$.${RANDOM:-0}
+			mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+		) || {
+			echo 'mkdir failed' >&2
+			exit 1
+		}
+		trap 'cd / && rm -rf "$tmp"' EXIT
 	elif	(( compile > 1 ))
 	then	echo $0: --compile: $SHCOMP not found >&2
 		exit 1
@@ -288,8 +294,14 @@ then	if	[[ -x $SHELL-g ]]
 	then	SHELL=$SHELL-g
 	fi
 	if	[[ ! $tmp ]]
-	then	tmp=$(mktemp -dt) || { echo mktemp -dt failed >&2; exit 1; }
+	then	tmp=$(
-		trap "cd /; rm -rf $tmp" EXIT
+			d=${TMPDIR:-/tmp}/ksh93.shtests.$$.${RANDOM:-0}
+			mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+		) || {
+			echo 'mkdir failed' >&2
+			exit 1
+		}
+		trap 'cd / && rm -rf "$tmp"' EXIT
 	fi
 	valxml=$tmp/valgrind.xml
 	valgrind+=" --xml-file=$valxml"

src/cmd/ksh93/tests/sigchld.sh

@@ -29,6 +29,15 @@ alias err_exit='err_exit $LINENO'
 float DELAY=${1:-0.2}
 integer FOREGROUND=10 BACKGROUND=2 Errors=0
 
+tmp=$(
+	d=${TMPDIR:-/tmp}/ksh93.sigchld.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
+
 s=$($SHELL -c '
 integer i foreground=0 background=0
 float delay='$DELAY' d=0 s=0
@@ -146,8 +155,6 @@ done
 (( d==2000 )) ||  err_exit "trap '' CHLD  causes side effects d=$d"
 trap - CHLD
 
-tmp=$(mktemp -dt)
-trap 'rm -rf $tmp' EXIT
 x=$($SHELL 2> /dev/null -ic '/bin/notfound; sleep .5 & sleep 1;jobs')
 [[ $x == *Done* ]] || err_exit 'SIGCHLD blocked after notfound'
 x=$($SHELL 2> /dev/null  -ic 'kill -0 12345678901234567876; sleep .5 & sleep 1;jobs')

src/cmd/ksh93/tests/signal.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.signal.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 cd $tmp || err_exit "cd $tmp failed"
 

src/cmd/ksh93/tests/subshell.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0 Error_fd=2
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.subshell.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 builtin getconf
 bincat=$(PATH=$(getconf PATH) whence -p cat)

src/cmd/ksh93/tests/tilde.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.tilde.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 if	$SHELL -c '[[ ~root == /* ]]'
 then	x=$(print -r -- ~root)

src/cmd/ksh93/tests/types.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.types.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 integer n=2
 

src/cmd/ksh93/tests/variables.sh

@@ -28,8 +28,14 @@ alias err_exit='err_exit $LINENO'
 Command=${0##*/}
 integer Errors=0
 
-tmp=$(mktemp -dt) || { err_exit mktemp -dt failed; exit 1; }
+tmp=$(
-trap "cd /; rm -rf $tmp" EXIT
+	d=${TMPDIR:-/tmp}/ksh93.variables.$$.${RANDOM:-0}
+	mkdir -m700 -- "$d" && CDPATH= cd -P -- "$d" && pwd
+) || {
+	err_exit 'mkdir failed'
+	exit 1
+}
+trap 'cd / && rm -rf "$tmp"' EXIT
 
 [[ ${.sh.version} == "$KSH_VERSION" ]] || err_exit '.sh.version != KSH_VERSION'
 unset ss