nshlib/nsh_fscmds:use strchr instead of strstr
@@ -1241,7 +1241,7 @@ int cmd_mkdir(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
for (; ; )
{
- slash = strstr(slash, "/");
+ slash = strchr(slash, '/');
if (slash != NULL)
{
*slash = '\0';
