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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
#include "core.hpp"
#include "socket.hpp"
#include "timer.hpp"
#include "version.hpp"
#include "mt_rand.hpp"
#include "nullpo.hpp"
/// Defined by each server
extern int do_init (int, char **);
extern void term_func (void);
// 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);
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)
return SIG_ERR;
return oact.sa_handler;
}
static void chld_proc (int UNUSED)
{
wait(NULL);
}
static void sig_proc (int UNUSED)
{
for (int i = 1; i < 31; ++i)
compat_signal(i, SIG_IGN);
term_func ();
_exit (0);
}
bool runflag = true;
/*
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)
{
/// Note that getpid() and getppid() may be very close
mt_seed (time (NULL) ^ (getpid () << 16) ^ (getppid () << 8));
do_socket ();
do_init (argc, argv);
// set up exit handlers *after* the initialization has happened.
// This is because term_func is likely to depend on successful init.
compat_signal (SIGPIPE, SIG_IGN);
compat_signal (SIGTERM, sig_proc);
compat_signal (SIGINT, sig_proc);
compat_signal (SIGCHLD, chld_proc);
// Signal to create coredumps by system when necessary (crash)
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);
atexit (term_func);
while (runflag)
{
do_sendrecv (do_timer (gettick_nocache ()));
do_parsepacket ();
}
}
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