--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/spbot/signals.c	Wed May 27 23:57:48 2009 +0300
@@ -0,0 +1,139 @@
+
+#include "signals.h"
+#include "log.h"
+
+#define _GNU_SOURCE
+
+#include <string.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <assert.h>
+
+struct signals {
+    /** The libevent base to use */
+    struct event_base *ev_base;
+    
+    /** Information about up to MAX_SIGNALS signals */
+    struct signal {
+        /** The event we use to handle the signal */
+        struct event *ev;
+
+    } sig_list[MAX_SIGNALS];
+    
+    /** Number of used sig_list slots */
+    int sig_count;
+};
+
+void signals_loopexit (int signal, short event, void *arg) 
+{
+    struct signals *signals = arg;
+
+    (void) event;
+
+    log_info("caught %s: exiting", /* strsignal(signal) */ "xxx");
+    
+    if (event_base_loopexit(signals->ev_base, NULL))
+        FATAL("event_base_loopexit");
+}
+
+void signals_ignore (int signal, short event, void *arg)
+{
+    struct signals *signals = arg;
+    
+    (void) signal;
+    (void) event;
+    (void) arg;
+    (void) signals;
+    
+    /* ignore */
+}
+
+err_t signals_create (struct signals **signals_ptr, struct event_base *ev_base)
+{
+    struct signals *signals;
+
+    if ((signals = calloc(1, sizeof(*signals))) == NULL)
+        return ERR_CALLOC;
+    
+    // simple attributes
+    signals->ev_base = ev_base;
+
+    // done
+    *signals_ptr = signals;
+
+    return SUCCESS;
+}
+
+err_t signals_add (struct signals *signals, int sigval, void (*sig_handler)(evutil_socket_t, short, void *), void *arg) 
+{
+    struct signal *sig_info;
+    
+    // find our sig_info
+    assert(signals->sig_count < MAX_SIGNALS);
+    sig_info = signals->sig_list + (signals->sig_count++);
+    
+    // set up the libevent signal events
+    if ((sig_info->ev = evsignal_new(signals->ev_base, sigval, sig_handler, arg)) == NULL)
+        return ERR_EVENT_NEW;
+
+    if (evsignal_add(sig_info->ev, NULL))
+        return ERR_EVENT_ADD;
+
+    // ok
+    return SUCCESS;
+}
+
+err_t signal_ignore (int signum, struct error_info *err)
+{
+    struct sigaction act = {
+        .sa_handler     = SIG_IGN,
+    };
+    
+    // signall the handler
+    if (sigaction(signum, &act, NULL))
+        RETURN_SET_ERROR_ERRNO(err, ERR_SIGACTION);
+
+    // ok
+    return SUCCESS;
+}
+
+struct signals *signals_default (struct event_base *ev_base) 
+{
+    struct signals *signals = NULL;
+    struct error_info err;
+    
+    // alloc signals
+    if (signals_create(&signals, ev_base))
+        return NULL;
+    
+    // add the set of default signals
+    if (signal_ignore(SIGPIPE, &err))
+        log_error(&err, "signal_ignore(SIGPIPE)");
+
+    if ((ERROR_CODE(&err) = signals_add(signals, SIGINT, &signals_loopexit, signals))) {
+        log_error(&err, "signals_add(SIGINT)");
+        goto error;
+    }
+
+    // ok
+    return signals;
+
+error:
+    signals_free(signals);
+
+    return NULL;
+}   
+
+void signals_free (struct signals *signals) 
+{
+    int i;
+    
+    // free all events
+    for (i = 0; i < signals->sig_count; i++) {
+        event_free(signals->sig_list[i].ev);
+    }
+    
+    // free the info itself
+    free(signals);
+}
+