From 599a35c60cdbff60be1effff6dfcc3860dc6ce62 Mon Sep 17 00:00:00 2001
From: Lucas Meijer <lucas@unity3d.com>
Date: Wed, 9 Mar 2011 16:33:17 +0100
Subject: [PATCH] split out mono_set_commandline_arguments(), so embedders can
 control what System.Environment.CommandLine returns.

---
 mono/metadata/object.c | 79 ++++++++++++++++++++++++++----------------
 mono/metadata/object.h |  3 ++
 2 files changed, 52 insertions(+), 30 deletions(-)

diff --git a/mono/metadata/object.c b/mono/metadata/object.c
index 40999a618ba..b732305350f 100644
--- a/mono/metadata/object.c
+++ b/mono/metadata/object.c
@@ -3454,41 +3454,29 @@ free_main_args (void)
 }
 
 /**
- * mono_runtime_run_main:
- * @method: the method to start the application with (usually Main)
+ * mono_set_commandline_arguments:
  * @argc: number of arguments from the command line
  * @argv: array of strings from the command line
- * @exc: excetption results
+ * @basedir: optional base path of assembly with entrypoint
  *
- * Execute a standard Main() method (argc/argv contains the
- * executable name). This method also sets the command line argument value
- * needed by System.Environment.
+ * This method sets the command line argument value needed by System.Environment.
  *
- * 
  */
-int
-mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
-		       MonoObject **exc)
+
+void
+mono_set_commandline_arguments(int argc, char* argv[], const char* basedir)
 {
 	int i;
-	MonoArray *args = NULL;
-	MonoDomain *domain = mono_domain_get ();
 	gchar *utf8_fullpath;
-	MonoMethodSignature *sig;
-
-	g_assert (method != NULL);
 	
-	mono_thread_set_main (mono_thread_current ());
-
+	g_assert (main_args == NULL);  //this function should only be called once.
 	main_args = g_new0 (char*, argc);
 	num_main_args = argc;
-
-	if (!g_path_is_absolute (argv [0])) {
+	
+	if (!g_path_is_absolute (argv [0]) && basedir != NULL) {
 		gchar *basename = g_path_get_basename (argv [0]);
-		gchar *fullpath = g_build_filename (method->klass->image->assembly->basedir,
-						    basename,
-						    NULL);
-
+		gchar *fullpath = g_build_filename (basedir, basename, NULL);
+		
 		utf8_fullpath = mono_utf8_from_external (fullpath);
 		if(utf8_fullpath == NULL) {
 			/* Printing the arg text will cause glib to
@@ -3500,7 +3488,7 @@ mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
 			g_print ("Please add the correct encoding to MONO_EXTERNAL_ENCODINGS and try again.\n");
 			exit (-1);
 		}
-
+		
 		g_free (fullpath);
 		g_free (basename);
 	} else {
@@ -3511,12 +3499,12 @@ mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
 			exit (-1);
 		}
 	}
-
+	
 	main_args [0] = utf8_fullpath;
-
+	
 	for (i = 1; i < argc; ++i) {
 		gchar *utf8_arg;
-
+		
 		utf8_arg=mono_utf8_from_external (argv[i]);
 		if(utf8_arg==NULL) {
 			/* Ditto the comment about Invalid UTF-8 here */
@@ -3524,11 +3512,37 @@ mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
 			g_print ("Please add the correct encoding to MONO_EXTERNAL_ENCODINGS and try again.\n");
 			exit (-1);
 		}
-
+		
 		main_args [i] = utf8_arg;
 	}
-	argc--;
-	argv++;
+}	
+
+/**
+ * mono_runtime_run_main:
+ * @method: the method to start the application with (usually Main)
+ * @argc: number of arguments from the command line
+ * @argv: array of strings from the command line
+ * @exc: excetption results
+ *
+ * Execute a standard Main() method (argc/argv contains the
+ * executable name). This method also sets the command line argument value
+ * needed by System.Environment.
+ *
+ * 
+ */
+int
+mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
+		       MonoObject **exc)
+{
+	int i;
+	MonoArray *args = NULL;
+	MonoDomain *domain = mono_domain_get ();
+
+	MonoMethodSignature *sig;
+
+	g_assert (method != NULL);
+	
+	mono_thread_set_main (mono_thread_current ());
 
 	sig = mono_method_signature (method);
 	if (!sig) {
@@ -3536,6 +3550,11 @@ mono_runtime_run_main (MonoMethod *method, int argc, char* argv[],
 		exit (-1);
 	}
 
+	mono_set_commandline_arguments(argc, argv, method->klass->image->assembly->basedir);
+	
+	argc--;
+	argv++;
+	
 	if (sig->param_count) {
 		args = (MonoArray*)mono_array_new (domain, mono_defaults.string_class, argc);
 		for (i = 0; i < argc; ++i) {
diff --git a/mono/metadata/object.h b/mono/metadata/object.h
index ee367d0ad74..ed113ebfc06 100644
--- a/mono/metadata/object.h
+++ b/mono/metadata/object.h
@@ -223,6 +223,9 @@ mono_runtime_invoke_array   (MonoMethod *method, void *obj, MonoArray *params,
 void*
 mono_method_get_unmanaged_thunk (MonoMethod *method);
 
+void
+mono_set_commandline_arguments (int argc, char* argv[], const char* basedir);
+
 MonoArray*
 mono_runtime_get_main_args  (void);
 
-- 
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