+static bool drop_privs() {
+#ifdef HAVE_MINGW
+ if (switchuser) {
+ logger(LOG_ERR, "%s not supported on this platform", "-U");
+ return false;
+ }
+ if (do_chroot) {
+ logger(LOG_ERR, "%s not supported on this platform", "-R");
+ return false;
+ }
+#else
+ uid_t uid = 0;
+ if (switchuser) {
+ struct passwd *pw = getpwnam(switchuser);
+ if (!pw) {
+ logger(LOG_ERR, "unknown user `%s'", switchuser);
+ return false;
+ }
+ uid = pw->pw_uid;
+ if (initgroups(switchuser, pw->pw_gid) != 0 ||
+ setgid(pw->pw_gid) != 0) {
+ logger(LOG_ERR, "System call `%s' failed: %s",
+ "initgroups", strerror(errno));
+ return false;
+ }
+ endgrent();
+ endpwent();
+ }
+ if (do_chroot) {
+ tzset(); /* for proper timestamps in logs */
+ if (chroot(confbase) != 0 || chdir("/") != 0) {
+ logger(LOG_ERR, "System call `%s' failed: %s",
+ "chroot", strerror(errno));
+ return false;
+ }
+ free(confbase);
+ confbase = xstrdup("");
+ }
+ if (switchuser)
+ if (setuid(uid) != 0) {
+ logger(LOG_ERR, "System call `%s' failed: %s",
+ "setuid", strerror(errno));
+ return false;
+ }
+#endif
+ return true;
+}
+
+#ifdef HAVE_MINGW
+# define setpriority(level) SetPriorityClass(GetCurrentProcess(), level)
+#else
+# define NORMAL_PRIORITY_CLASS 0
+# define BELOW_NORMAL_PRIORITY_CLASS 10
+# define HIGH_PRIORITY_CLASS -10
+# define setpriority(level) nice(level)
+#endif
+
+int main(int argc, char **argv) {
+ program_name = argv[0];
+
+ if(!parse_options(argc, argv))
+ return 1;
+
+ make_names();
+
+ if(show_version) {
+ printf("%s version %s (built %s %s, protocol %d)\n", PACKAGE,
+ VERSION, __DATE__, __TIME__, PROT_CURRENT);
+ printf("Copyright (C) 1998-2009 Ivo Timmermans, Guus Sliepen and others.\n"
+ "See the AUTHORS file for a complete list.\n\n"
+ "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
+ "and you are welcome to redistribute it under certain conditions;\n"
+ "see the file COPYING for details.\n");
+
+ return 0;
+ }
+
+ if(show_help) {
+ usage(false);
+ return 0;
+ }
+
+#ifdef HAVE_MINGW
+ if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+ logger(LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
+ return 1;
+ }
+#endif