quote-bot/signal.c

#include <signal.h>             /* signal */
#include <stdio.h>              /* fprintf */
#include <string.h>             /* memset */

#include <libircclient.h>

#include "threads.h"            /* F_* */
#include "i18n.h"

#ifdef BUFSIZ
#undef BUFSIZ
#endif
#define BUFSIZ 127

extern irc_session_t *irc_session;

static const char string_signal_recv_fmt[]    = _("Received %s, exiting.\n");
static const char string_signal_unknown_fmt[] = _("(Unknown Signal)");

static void SignalHandler(int sig) {
    char buf[BUFSIZ+1];
    const char *s = string_signal_unknown_fmt;
#define CASE(x) case x: s = #x; break
    switch (sig) {
        CASE(SIGTERM);
        CASE(SIGINT);
#ifndef _WIN32
        CASE(SIGQUIT);
        CASE(SIGKILL);
        CASE(SIGHUP);
#endif
    default:
        break;
    }
#undef CASE

    memset(&buf, 0, BUFSIZ+1);
    snprintf(buf, BUFSIZ, string_signal_recv_fmt, s);
    fprintf(stderr, "%s", buf);

    F_IRC_THREAD = STOPPED;
    F_MAIN_THREAD = STOPPED;
    F_SPAM_THREADS = STOPPED;

    if (NULL != irc_session)
        irc_cmd_quit(irc_session, buf);
    /* TODO: clean exit */
}

void install_signal_handler(void) {
    signal(SIGTERM, SignalHandler);
    signal(SIGINT, SignalHandler);
#ifndef _WIN32
    signal(SIGQUIT, SignalHandler);
    signal(SIGKILL, SignalHandler);
    signal(SIGHUP, SignalHandler);
#endif
}