1 files changed, 20 insertions, 0 deletions
diff --git a/shell.sh b/shell.sh
new file mode 100644
index 0000000..45cf5cf
--- /dev/null
+++ b/shell.sh
@@ -0,0 +1,20 @@
+suspend() {
+	if [ x"$0" -ne x"${0#-}" ]; then
+		#TODO: handle -f
+		printf 'suspend: not suspending login shell\n' >&2
+	else
+		kill -STOP $$
+	fi
+}
+
+logout() {
+	if [ x"$0" -ne x"${0#-}" ]; then
+	 	printf 'logout: use exit to leave non-login shell\n' >&2
+	else
+		exit "$@"
+	fi
+}
+
+source() {
+	. "$@"
+}