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#include "core.hpp"
#include <sys/wait.h>
#include <unistd.h>
#include <csignal>
#include <cstdlib>
#include <ctime>
#include "../strings/zstring.hpp"
#include "../generic/random.hpp"
#include "../io/cxxstdio.hpp"
#include "socket.hpp"
#include "timer.hpp"
#include "../poison.hpp"
// Added by Gabuzomeu
//
// This is an implementation of signal() using sigaction() for portability.
// (sigaction() is POSIX; signal() is not.) Taken from Stevens' _Advanced
// Programming in the UNIX Environment_.
//
typedef void(*sigfunc)(int);
static
sigfunc compat_signal(int signo, sigfunc func)
{
struct sigaction sact, oact;
sact.sa_handler = func;
sigfillset(&sact.sa_mask);
sigdelset(&sact.sa_mask, SIGSEGV);
sigdelset(&sact.sa_mask, SIGBUS);
sigdelset(&sact.sa_mask, SIGTRAP);
sigdelset(&sact.sa_mask, SIGILL);
sigdelset(&sact.sa_mask, SIGFPE);
sact.sa_flags = 0;
if (sigaction(signo, &sact, &oact) < 0)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
return SIG_ERR;
#pragma GCC diagnostic pop
return oact.sa_handler;
}
volatile
bool runflag = true;
static
void chld_proc(int)
{
wait(NULL);
}
static
void sig_proc(int)
{
for (int i = 1; i < 31; ++i)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
compat_signal(i, SIG_IGN);
#pragma GCC diagnostic pop
runflag = false;
}
/*
Note about fatal signals:
Under certain circumstances,
the following signals MUST not be ignored:
SIGFPE, SIGSEGV, SIGILL
Unless you use SA_SIGINFO and *carefully* check the origin,
that means they must be SIG_DFL.
*/
int main(int argc, char **argv)
{
// ZString args[argc]; is (deliberately!) not supported by clang yet
ZString *args = static_cast<ZString *>(alloca(argc * sizeof(ZString)));
for (int i = 0; i < argc; ++i)
args[i] = ZString(strings::really_construct_from_a_pointer, argv[i], nullptr);
do_init(argc, args);
if (!runflag)
{
PRINTF("Fatal error during startup; exiting\n");
return 1;
}
// set up exit handlers *after* the initialization has happened.
// This is because term_func is likely to depend on successful init.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
compat_signal(SIGPIPE, SIG_IGN);
#pragma GCC diagnostic pop
compat_signal(SIGTERM, sig_proc);
compat_signal(SIGINT, sig_proc);
compat_signal(SIGCHLD, chld_proc);
// Signal to create coredumps by system when necessary (crash)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
compat_signal(SIGSEGV, SIG_DFL);
compat_signal(SIGBUS, SIG_DFL);
compat_signal(SIGTRAP, SIG_DFL);
compat_signal(SIGILL, SIG_DFL);
compat_signal(SIGFPE, SIG_DFL);
#pragma GCC diagnostic pop
atexit(term_func);
while (runflag)
{
// TODO - if timers take a long time to run, this
// may wait too long in sendrecv
tick_t now = milli_clock::now();
interval_t next = do_timer(now);
do_sendrecv(next);
do_parsepacket();
}
}
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