1 files changed, 3 insertions, 2 deletions
diff --git a/src/cmd.sh b/src/cmd.sh
index 5ec67bf..1ed69b2 100644
--- a/src/cmd.sh
+++ b/src/cmd.sh
@@ -17,7 +17,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-cmds=
+cmds=' '
 
 register_cmd()
 {
@@ -96,7 +96,8 @@ is_cmd()
 {
 	local cmd="${1}"
 
-	[ "x$(printf '%s\n' ${cmds} | grep "^${cmd}$")" = "x${cmd}" ]
+	case "${cmds}" in *" ${cmd} "*) return 0;; esac
+	return 1
 }
 
 run_cmd()