From c20463c47d5d7bfbeed013d7d0410c65a34cf783 Mon Sep 17 00:00:00 2001
From: Frederic Culot <calcurse@culot.org>
Date: Mon, 20 Jul 2009 19:44:04 +0000
Subject: New files to implement calcurse daemon.

---
 src/dmon.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 src/dmon.c

(limited to 'src/dmon.c')

diff --git a/src/dmon.c b/src/dmon.c
new file mode 100644
index 0000000..5845cda
--- /dev/null
+++ b/src/dmon.c
@@ -0,0 +1,171 @@
+/*	$calcurse: dmon.c,v 1.1 2009/07/20 19:44:04 culot Exp $	*/
+
+/*
+ * Calcurse - text-based organizer
+ *
+ * Copyright (c) 2009 Frederic Culot <frederic@culot.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the
+ *        following disclaimer.
+ *
+ *      - 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Send your feedback or comments to : calcurse@culot.org
+ * Calcurse home page : http://culot.org/calcurse
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <paths.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+
+#include "utils.h"
+#include "i18n.h"
+#include "sigs.h"
+#include "mem.h"
+#include "io.h"
+#include "custom.h"
+#include "notify.h"
+#include "dmon.h"
+
+#define DMON_SLEEP_TIME  60
+
+static void
+dmon_sigs_hdlr (int sig)
+{
+  notify_free_app ();
+  
+  exit (EXIT_SUCCESS);
+}
+
+static unsigned
+daemonize (int status)
+{
+  int fd;
+  
+  /*
+   * Operate in the background: Daemonizing.
+   *
+   * First need to fork in order to become a child of the init process,
+   * once the father exits.
+   */
+  switch (fork ())
+    {
+    case -1:               /* fork error */
+      ERROR_MSG (_("Could not fork: %s\n"), strerror (errno));
+      return 0;
+      break;
+    case 0:                /* child */
+      break;
+    default:               /* parent */
+      exit (status);
+    }
+
+  /*
+   * Process independency.
+   *
+   * Obtain a new process group and session in order to get detached from the
+   * controlling terminal.
+   */
+  if (setsid () == -1)
+    {
+      ERROR_MSG (_("Could not detach from the controlling terminal: %s\n"),
+                 strerror (errno));
+      return 0;
+    }
+
+  /*
+   * Change working directory to root directory,
+   * to prevent filesystem unmounts.
+   */
+  if (chdir ("/") == -1)
+    {
+      ERROR_MSG (_("Could not change working directory: %s\n"),
+                 strerror (errno));
+      return 0;
+    }
+      
+  /* Redirect standard file descriptors to /dev/null. */
+  if ((fd = open (_PATH_DEVNULL, O_RDWR, 0)) != -1)
+    {
+      (void)dup2 (fd, STDIN_FILENO);
+      (void)dup2 (fd, STDOUT_FILENO);
+      (void)dup2 (fd, STDERR_FILENO);
+      if (fd > 2)
+        (void)close (fd);
+    }
+
+  /* Write access for the owner only. */
+  (void)umask (0022);
+
+  if (!sigs_set_hdlr (SIGINT, dmon_sigs_hdlr)
+      || !sigs_set_hdlr (SIGTERM, dmon_sigs_hdlr)
+      || !sigs_set_hdlr (SIGALRM, dmon_sigs_hdlr)
+      || !sigs_set_hdlr (SIGQUIT, dmon_sigs_hdlr)
+      || !sigs_set_hdlr (SIGCHLD, SIG_IGN))
+    return 0;
+
+  return 1;
+}
+
+void
+dmon_start (int parent_exit_status)
+{
+  conf_t conf;
+  
+  if (!daemonize (parent_exit_status))
+    EXIT (_("Cannot daemonize, aborting\n"));
+
+  io_check_file (path_conf, (int *)0);
+  custom_load_conf (&conf, 0);
+  
+  io_check_file (path_apts, (int *)0);
+  io_load_app ();  
+            
+  for (;;)
+    {
+      struct notify_app_s next;
+
+      (void)notify_get_next (&next);
+      if (next.got_app)
+        {
+          int left;
+
+          notify_update_app (next.time, next.state, next.txt);
+          left = notify_time_left ();
+
+          if (left < nbar.cntdwn)
+            notify_launch_cmd ();
+        }
+      
+      if (next.txt)
+        mem_free (next.txt);
+      
+      psleep (DMON_SLEEP_TIME);
+    }
+}
-- 
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