xzdiff: Use mkdir if mktemp isn't available.
diff --git a/src/scripts/xzdiff.in b/src/scripts/xzdiff.in
index ea35d26..79df383 100644
--- a/src/scripts/xzdiff.in
+++ b/src/scripts/xzdiff.in
@@ -139,7 +139,22 @@
test -n "$tmp" && rm -rf "$tmp"
(exit 2); exit 2
' HUP INT PIPE TERM 0
- tmp=`mktemp -t -d -- "$prog.XXXXXXXXXX"` || exit 2
+ if type mktemp >/dev/null 2>&1; then
+ tmp=`mktemp -t -d -- "$prog.XXXXXXXXXX"` || exit 2
+ else
+ # Fallback code if mktemp is missing. This isn't as
+ # robust as using mktemp since this doesn't try with
+ # different file names in case of a file name conflict.
+ #
+ # There's no need to save the original umask since
+ # we don't create any non-temp files. Note that using
+ # mkdir -m 0077 isn't secure since some mkdir implementations
+ # create the dir with the default umask and chmod the
+ # the dir afterwards.
+ umask 0077
+ mkdir -- "${TMPDIR-/tmp}/$prog.$$" || exit 2
+ tmp="${TMPDIR-/tmp}/$prog.$$"
+ fi
$xz2 -cdfq -- "$2" > "$tmp/$F" || exit 2
xz_status=$(
exec 4>&1
