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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2006-2007 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/inotify.h>
#ifndef IN_ONLYDIR
#define IN_ONLYDIR 0x01000000
#endif
#include <glib.h>
#include "logging.h"
#include "notify.h"
static GIOChannel *io = NULL;
static int fd = -1;
static int wd = -1;
static char *name = NULL;
static notify_func callback = NULL;
static gboolean io_event(GIOChannel *chan, GIOCondition cond, gpointer data)
{
unsigned char buf[129], *ptr = buf;
gsize len;
GIOError err;
if (cond & (G_IO_HUP | G_IO_ERR))
return FALSE;
memset(buf, 0, sizeof(buf));
err = g_io_channel_read(chan, (gchar *) buf, sizeof(buf) - 1, &len);
if (err == G_IO_ERROR_AGAIN)
return TRUE;
while (len >= sizeof(struct inotify_event)) {
struct inotify_event *evt = (struct inotify_event *) ptr;
if (evt->wd != wd || !callback)
continue;
if (evt->mask & (IN_CREATE | IN_MOVED_TO))
callback(NOTIFY_CREATE, evt->name, NULL);
if (evt->mask & (IN_DELETE | IN_MOVED_FROM))
callback(NOTIFY_DELETE, evt->name, NULL);
if (evt->mask & IN_MODIFY)
callback(NOTIFY_MODIFY, evt->name, NULL);
len -= sizeof(struct inotify_event) + evt->len;
ptr += sizeof(struct inotify_event) + evt->len;
}
return TRUE;
}
void notify_init(void)
{
if (fd != -1)
return;
fd = inotify_init();
if (fd < 0) {
error("Creation of inotify context failed");
return;
}
io = g_io_channel_unix_new(fd);
if (!io) {
error("Creation of inotify channel failed");
return;
}
g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP, io_event, NULL);
}
void notify_close(void)
{
if (fd == -1)
return;
if (wd != -1) {
inotify_rm_watch(fd, wd);
wd = -1;
}
if (io) {
g_io_channel_unref(io);
io = NULL;
}
close(fd);
fd = -1;
if (name) {
free(name);
name = NULL;
}
}
void notify_add(const char *pathname, notify_func func, void *user_data)
{
if (fd == -1 || wd != -1)
return;
if (name)
free(name);
name = strdup(pathname);
if (!name)
return;
wd = inotify_add_watch(fd, pathname,
IN_ONLYDIR | IN_CREATE | IN_DELETE | IN_MODIFY | IN_MOVE);
if (wd < 0)
error("Creation of watch for %s failed", pathname);
callback = func;
}
void notify_remove(const char *pathname)
{
if (fd == -1 || wd == -1)
return;
inotify_rm_watch(fd, wd);
wd = -1;
callback = NULL;
}
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