Add openbsd platform file from David Dahlberg

1 files changed, 40 insertions, 0 deletions

diff --git a/src/platform/openbsd.sh b/src/platform/openbsd.sh
new file mode 100644
index 0000000..b66b32f
--- /dev/null
+++ b/src/platform/openbsd.sh
@@ -0,0 +1,40 @@
+# Copyright (C) 2012 Jonathan Chu <milki@rescomp.berkeley.edu>. All Rights Reserved.
+# Copyright (C) 2015 David Dahlberg <david.dahlberg@fkie.fraunhofer.de>. All Rights Reserved.
+# This file is licensed under the GPLv2+. Please see COPYING for more information.
+
+tmpdir() {
+	[[ -n $SECURE_TMPDIR ]] && return
+	local warn=1
+	[[ $1 == "nowarn" ]] && warn=0
+	local template="$PROGRAM.XXXXXXXXXXXXX"
+	if [[ $(sysctl -n kern.usermount) == 1 ]]; then
+		SECURE_TMPDIR="$(mktemp -d "${TMPDIR:-/tmp}/$template")"
+		mount -t tmpfs -o -s16M tmpfs "$SECURE_TMPDIR" || die "Error: could not create tmpfs."
+		unmount_tmpdir() {
+			 [[ -n $SECURE_TMPDIR && -d $SECURE_TMPDIR ]] || return
+			 umount "$SECURE_TMPDIR"
+			 rm -rf "$SECURE_TMPDIR"
+		}
+		trap unmount_tmpdir INT TERM EXIT
+	else
+		[[ $warn -eq 1 ]] && yesno "$(cat <<-_EOF
+		The sysctl kern.usermount is disabled, therefore it is not
+		possible to create a tmpfs for temporary storage of files
+		in memory.
+		This means that it may be difficult to entirely erase
+		the temporary non-encrypted password file after editing.
+
+		Are you sure you would like to continue?
+		_EOF
+		)"
+		SECURE_TMPDIR="$(mktemp -d "${TMPDIR:-/tmp}/$template")"
+		shred_tmpfile() {
+			find "$SECURE_TMPDIR" -type f -exec $SHRED {} +
+			rm -rf "$SECURE_TMPDIR"
+		}
+		trap shred_tmpfile INT TERM EXIT
+	fi
+}
+
+GETOPT="gnugetopt"
+SHRED="rm -P -f"