/* Serval DNA daemon Copyright (C) 2012 Serval Project Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "serval.h" #include "conf.h" static void crash_handler(int signal); int main(int argc, char **argv) { #if defined WIN32 WSADATA wsa_data; WSAStartup(MAKEWORD(1,1), &wsa_data); #endif /* Catch crash signals so that we can log a backtrace before expiring. */ struct sigaction sig; sig.sa_handler = crash_handler; sigemptyset(&sig.sa_mask); // Don't block any signals during handler sig.sa_flags = SA_NODEFER | SA_RESETHAND; // So the signal handler can kill the process by re-sending the same signal to itself sigaction(SIGSEGV, &sig, NULL); sigaction(SIGFPE, &sig, NULL); sigaction(SIGILL, &sig, NULL); sigaction(SIGBUS, &sig, NULL); sigaction(SIGABRT, &sig, NULL); /* Setup i/o signal handlers */ signal(SIGPIPE,sigPipeHandler); signal(SIGIO,sigIoHandler); srandomdev(); server_save_argv(argc, (const char*const*)argv); cf_init(); int status = parseCommandLine(NULL, argv[0], argc - 1, (const char*const*)&argv[1]); #if defined WIN32 WSACleanup(); #endif return status; } char crash_handler_clue[1024] = "no clue"; static void crash_handler(int signal) { LOGF(LOG_LEVEL_FATAL, "Caught signal %s", alloca_signal_name(signal)); LOGF(LOG_LEVEL_FATAL, "The following clue may help: %s", crash_handler_clue); dump_stack(LOG_LEVEL_FATAL); BACKTRACE; serverRespawn(); // Now die of the same signal, so that our exit status reflects the cause. INFOF("Re-sending signal %d to self", signal); kill(getpid(), signal); // If that didn't work, then die normally. INFOF("exit(%d)", -signal); exit(-signal); } #if 0 #include #define MAX_DEPTH 64 int printBackTrace() { int i,depth=0; void *functions[MAX_DEPTH]; char **function_names; depth = backtrace (functions, MAX_DEPTH); function_names = backtrace_symbols (functions, depth); for(i=0;i