From 31cdcdd0a4b77e9960979e4e9b271e7291cbfdc5 Mon Sep 17 00:00:00 2001
From: Francois Berder <18538310+francois-berder@users.noreply.github.com>
Date: Sat, 2 May 2020 20:55:28 +0100
Subject: [PATCH] sys/shell: commands: Check argc in _pm_handler

Signed-off-by: Francois Berder <18538310+francois-berder@users.noreply.github.com>
---
 sys/shell/commands/sc_pm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/shell/commands/sc_pm.c b/sys/shell/commands/sc_pm.c
index fe5dec21c..44e3c915b 100644
--- a/sys/shell/commands/sc_pm.c
+++ b/sys/shell/commands/sc_pm.c
@@ -149,6 +149,11 @@ static int cmd_off(char *arg)
 
 int _pm_handler(int argc, char **argv)
 {
+    if (argc < 2) {
+        _print_usage();
+        return 1;
+    }
+
 #ifdef MODULE_PM_LAYERED
     if (!strcmp(argv[1], "show")) {
         if (argc != 2) {
@@ -182,8 +187,6 @@ int _pm_handler(int argc, char **argv)
 
         return cmd_set(argv[2]);
     }
-#else
-    (void)argc;
 #endif /* MODULE_PM_LAYERED */
 
     if (!strcmp(argv[1], "off")) {