Fix multiple configured scripts conflicts issue (version 2)

This is a fix for trac ticket #20,
<https://community.openvpn.net/openvpn/ticket/20>
which was started in the sf.net bug tracker:
<http://sourceforge.net/tracker/?func=detail&aid=2078470&group_id=48978&atid=454719>

The implemented solution is to give a warning for each of the different script hooks
available.  The last configured script will override any earlier configured scripts,
to ensure that the command line can override the configuration file.

Signed-off-by: David Sommerseth <dazo@users.sourceforge.net>
Acked-by: James Yonan <james@openvpn.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/options.c b/options.c
index 6d3ef8e..3c20f5b 100644
--- a/options.c
+++ b/options.c
@@ -3491,6 +3491,15 @@ msglevel_forward_compatible (struct options *options, const int msglevel)
 }
 
 static void
+warn_multiple_script (const char *script, const char *type) {
+      if (script) {
+	msg (M_WARN, "Multiple --%s scripts defined.  "
+	     "The previously configured script is overridden.", type);
+      }
+}
+
+
+static void
 add_option (struct options *options,
 	    char *p[],
 	    const char *file,
@@ -3890,6 +3899,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->ipchange, "ipchange");
       options->ipchange = string_substitute (p[1], ',', ' ', &options->gc);
     }
   else if (streq (p[0], "float"))
@@ -3936,6 +3946,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->up_script, "up");
       options->up_script = p[1];
     }
   else if (streq (p[0], "down") && p[1])
@@ -3943,6 +3954,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->down_script, "down");
       options->down_script = p[1];
     }
   else if (streq (p[0], "down-pre"))
@@ -4624,6 +4636,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->route_script, "route-up");
       options->route_script = p[1];
     }
   else if (streq (p[0], "route-noexec"))
@@ -4953,6 +4966,7 @@ add_option (struct options *options,
 	  msg (msglevel, "--auth-user-pass-verify requires a second parameter ('via-env' or 'via-file')");
 	  goto err;
 	}
+      warn_multiple_script (options->auth_user_pass_verify_script, "auth-user-pass-verify");
       options->auth_user_pass_verify_script = p[1];
     }
   else if (streq (p[0], "client-connect") && p[1])
@@ -4960,6 +4974,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->client_connect_script, "client-connect");
       options->client_connect_script = p[1];
     }
   else if (streq (p[0], "client-disconnect") && p[1])
@@ -4967,6 +4982,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->client_disconnect_script, "client-disconnect");
       options->client_disconnect_script = p[1];
     }
   else if (streq (p[0], "learn-address") && p[1])
@@ -4974,6 +4990,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->learn_address_script, "learn-address");
       options->learn_address_script = p[1];
     }
   else if (streq (p[0], "tmp-dir") && p[1])
@@ -5753,6 +5770,7 @@ add_option (struct options *options,
       VERIFY_PERMISSION (OPT_P_SCRIPT);
       if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT))
 	goto err;
+      warn_multiple_script (options->tls_verify, "tls-verify");
       options->tls_verify = string_substitute (p[1], ',', ' ', &options->gc);
     }
   else if (streq (p[0], "tls-remote") && p[1])