swanctl: Add check for conflicting short options

diff --git a/src/swanctl/command.c b/src/swanctl/command.c
index 7f65d2b0e34b8a1bb6bf1dfae067fb41f7d88e86..225dff61767d9a4b84a5d0cbd6536773e84c3c20 100644 (file)
--- a/src/swanctl/command.c
+++ b/src/swanctl/command.c
@@ -147,6 +147,15 @@ void command_register(command_t command)
                                "MAX_COMMANDS\n");
                return;
        }
+       for (i = 0; i < MAX_COMMANDS && cmds[i].cmd; i++)
+       {
+               if (cmds[i].op == command.op)
+               {
+                       fprintf(stderr, "unable to register command --%s, short option "
+                                       "conflicts with --%s\n", command.cmd, cmds[i].cmd);
+                       return;
+               }
+       }
 
        cmds[registered] = command;
        /* append default options, but not to --help */