/* * Copyright (c) 1998-2003 Carnegie Mellon University. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The name "Carnegie Mellon University" must not be used to * endorse or promote products derived from this software without * prior written permission. For permission or any other legal * details, please contact * Office of Technology Transfer * Carnegie Mellon University * 5000 Forbes Avenue * Pittsburgh, PA 15213-3890 * (412) 268-4387, fax: (412) 268-7395 * tech-transfer@andrew.cmu.edu * * 4. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by Computing Services * at Carnegie Mellon University (http://www.cmu.edu/computing/)." * * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* $Id: idle_poll.c,v 1.5 2005/03/05 00:36:54 dasenbro Exp $ */ #include <config.h> #include <syslog.h> #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #include <signal.h> #include "idle.h" #include "global.h" const char *idle_method_desc = "poll"; /* function to report mailbox updates to the client */ static idle_updateproc_t *idle_update = NULL; /* how often to poll the mailbox */ static time_t idle_period = -1; int idle_enabled(void) { /* get polling period */ if (idle_period == -1) { idle_period = config_getint(IMAPOPT_IMAPIDLEPOLL); if (idle_period < 0) idle_period = 0; } /* a period of zero disables IDLE */ return idle_period; } static void idle_poll(int sig __attribute__((unused))) { idle_update(IDLE_MAILBOX|IDLE_ALERT); alarm(idle_period); } int idle_init(struct mailbox *mailbox __attribute__((unused)), idle_updateproc_t *proc) { struct sigaction action; idle_update = proc; /* Setup the mailbox polling function to be called at 'idle_period' seconds from now */ sigemptyset(&action.sa_mask); action.sa_flags = 0; #ifdef SA_RESTART action.sa_flags |= SA_RESTART; #endif action.sa_handler = idle_poll; if (sigaction(SIGALRM, &action, NULL) < 0) { syslog(LOG_ERR, "sigaction: %m"); return 0; } alarm(idle_period); return 1; } void idle_done(struct mailbox *mailbox __attribute__((unused))) { /* Remove the polling function */ signal(SIGALRM, SIG_IGN); }