===================================================================
RCS file: /cvs/openbsd/fw_update/fw_install.sh,v
retrieving revision 1.43
retrieving revision 1.44
diff -u -r1.43 -r1.44
--- openbsd/fw_update/fw_install.sh	2021/12/02 02:56:37	1.43
+++ openbsd/fw_update/fw_install.sh	2021/12/02 03:05:49	1.44
@@ -1,5 +1,5 @@
 #!/bin/ksh
-#	$OpenBSD: fw_install.sh,v 1.43 2021/12/02 02:56:37 afresh1 Exp $
+#	$OpenBSD: fw_install.sh,v 1.44 2021/12/02 03:05:49 afresh1 Exp $
 set -e
 
 # Copyright (c) 2021 Andrew Hewus Fresh <afresh1@openbsd.org>
@@ -23,14 +23,24 @@
 
 # tmpdir, do_as, unpriv, and unpriv2 are from install.sub
 # modified to use su(1) when not in the installer.
+# modified to use mktemp(1) when not in the installer.
 
 # Create a temporary directory based on the supplied directory name prefix.
 tmpdir() {
 	local _i=1 _dir
+	if [[ -z $1 ]]; then
+		echo No tmpdir >&2
+		exit 1
+	fi
 
-	until _dir="${1?}.$_i.$RANDOM" && mkdir -- "$_dir" 2>/dev/null; do
-		((++_i < 10000)) || return 1
-	done
+	if [[ -e /usr/bin/mktemp ]]; then
+		_dir=$(/usr/bin/mktemp -d $1 )
+		chown _sndio "$_dir"
+	else
+		until _dir="${1?}.$_i.$RANDOM" && mkdir -- "$_dir" 2>/dev/null; do
+		    ((++_i < 10000)) || return 1
+		done
+	fi
 	echo "$_dir"
 }
 
@@ -144,7 +154,7 @@
 		# Create a download directory for the firmware and
 		# check that the _sndio user can read files from
 		# it. Otherwise cleanup and skip the filesystem.
-		if _tmpsrc=$(tmpdir "$_tmpfs/firmware"); then
+		if _tmpsrc=$(tmpdir "$_tmpfs/firmware-XXXXXXXXX"); then
 			(
 			>$_tmpsrc/t &&
 			$_unpriv cat $_tmpsrc/t