1 files changed, 97 insertions, 0 deletions
diff --git a/src/common/core.cpp b/src/common/core.cpp
new file mode 100644
index 0000000..38b2260
--- /dev/null
+++ b/src/common/core.cpp
@@ -0,0 +1,97 @@
+#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 ();
+    }
+}