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https://github.com/servalproject/serval-dna.git
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71cbe86566
This introduces a new way of linking Serval executables and dynamic libraries from static libraries like libservald.a -- called "feature-driven" linking. The Makefile now links servald and serval-tests from libservald.a, rather than from an explicit list of object (.o) files. Thanks to the section-based method for registering functions such as HTTP handlers, CLI commands and MDP handlers, these object files had become "stand-alone" and hence were no longer included in the link because there was no unresolved reference that required them to be linked in. The new "feature.h" provides the DECLARE_FEATURE(name) macro that each stand-alone source file uses to declare the named feature(s) it provides. Each executable can call the USE_FEATURE(name) macro in any of its explicitly-linked source files to cause the corresponding object(s) to be included in the link, eg, servald_features.c. The DEFINE_BINDING() macro has been extended so that every individual MDP binding is given a feature name based on its port number macro, eg, "mdp_binding_MDP_PORT_ECHO". Some features have been factored into their own separate source files so they can be omitted or included in a build independently of each other: - the MDP bindings for MDP_PORT_DNALOOKUP, MDP_PORT_ECHO, MDP_PORT_TRACE, MDP_PORT_KEYMAPREQUEST, MDP_PORT_RHIZOME_xxx, MDP_PORT_PROBE, MDP_PORT_STUN, MDP_PORT_STUNREQ - the CLI "log" and "echo" commands - the CLI "rhizome direct" command The JNI source files are only compiled if the <jni.h> header is present, otherwise they are omitted from libservald.so.
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/*
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Serval DNA main command-line entry point
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Copyright (C) 2012 Serval Project Inc.
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Copyright (C) 2016 Flinders University
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <signal.h>
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#include "commandline.h"
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#include "sighandlers.h"
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#include "conf.h"
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static void crash_handler(int signal);
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int servald_main(int argc, char **argv)
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{
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#if defined WIN32
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WSADATA wsa_data;
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WSAStartup(MAKEWORD(1,1), &wsa_data);
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#endif
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/* Catch crash signals so that we can log a backtrace before expiring. */
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struct sigaction sig;
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sig.sa_handler = crash_handler;
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sigemptyset(&sig.sa_mask); // Don't block any signals during handler
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sig.sa_flags = SA_NODEFER | SA_RESETHAND; // So the signal handler can kill the process by re-sending the same signal to itself
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sigaction(SIGSEGV, &sig, NULL);
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sigaction(SIGFPE, &sig, NULL);
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sigaction(SIGILL, &sig, NULL);
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sigaction(SIGBUS, &sig, NULL);
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sigaction(SIGABRT, &sig, NULL);
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/* Setup i/o signal handlers */
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signal(SIGPIPE, sigPipeHandler);
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signal(SIGIO, sigIoHandler);
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int status = commandline_main_stdio(stdout, argv[0], argc - 1, (const char*const*)&argv[1]);
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#if defined WIN32
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WSACleanup();
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#endif
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return status;
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}
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char crash_handler_clue[1024] = "no clue";
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static void crash_handler(int signum)
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{
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LOGF(LOG_LEVEL_FATAL, "Caught signal %s", alloca_signal_name(signum));
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LOGF(LOG_LEVEL_FATAL, "The following clue may help: %s", crash_handler_clue);
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dump_stack(LOG_LEVEL_FATAL);
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BACKTRACE;
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// Exit with a status code indicating the caught signal. This involves removing the signal
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// handler for the caught signal then re-sending the same signal to ourself. If that doesn't
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// work, then exit with an error code.
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struct sigaction sig;
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bzero(&sig, sizeof sig);
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sig.sa_flags = 0;
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sig.sa_handler = SIG_DFL;
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sigemptyset(&sig.sa_mask);
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sigaction(signum, &sig, NULL);
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INFOF("Re-sending signal %d to self", signum);
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kill(getpid(), signum); // should terminate self
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exit(-1);
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}
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