Move literally everything out of src/or

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

1 files changed, 88 insertions, 0 deletions

diff --git a/src/feature/api/tor_api.c b/src/feature/api/tor_api.c
new file mode 100644
index 0000000000..efedf2dc78
--- /dev/null
+++ b/src/feature/api/tor_api.c
@@ -0,0 +1,88 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file tor_api.c
+ **/
+
+#include "or/tor_api.h"
+#include "or/tor_api_internal.h"
+
+// Include this after the above headers, to insure that they don't
+// depend on anything else.
+#include "orconfig.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// We don't want to use tor_malloc and tor_free here, since this needs
+// to run before anything is initialized at all, and ought to run when
+// we're not linked to anything at all.
+
+#define raw_malloc malloc
+#define raw_free free
+
+tor_main_configuration_t *
+tor_main_configuration_new(void)
+{
+  static const char *fake_argv[] = { "tor" };
+  tor_main_configuration_t *cfg = raw_malloc(sizeof(*cfg));
+  if (cfg == NULL)
+    return NULL;
+
+  memset(cfg, 0, sizeof(*cfg));
+
+  cfg->argc = 1;
+  cfg->argv = (char **) fake_argv;
+
+  return cfg;
+}
+
+int
+tor_main_configuration_set_command_line(tor_main_configuration_t *cfg,
+                                        int argc, char *argv[])
+{
+  if (cfg == NULL)
+    return -1;
+  cfg->argc = argc;
+  cfg->argv = argv;
+  return 0;
+}
+
+void
+tor_main_configuration_free(tor_main_configuration_t *cfg)
+{
+  if (cfg == NULL)
+    return;
+  raw_free(cfg);
+}
+
+/* Main entry point for the Tor process.  Called from main().
+ *
+ * This function is distinct from main() only so we can link main.c into
+ * the unittest binary without conflicting with the unittests' main.
+ *
+ * Some embedders have historically called this function; but that usage is
+ * deprecated: they should use tor_run_main() instead.
+ */
+int
+tor_main(int argc, char *argv[])
+{
+  tor_main_configuration_t *cfg = tor_main_configuration_new();
+  if (!cfg) {
+    puts("INTERNAL ERROR: Allocation failure. Cannot proceed");
+    return 1;
+  }
+  if (tor_main_configuration_set_command_line(cfg, argc, argv) < 0) {
+    puts("INTERNAL ERROR: Can't set command line. Cannot proceed.");
+    return 1;
+  }
+  int rv = tor_run_main(cfg);
+  tor_main_configuration_free(cfg);
+  return rv;
+}
+