/*
 * kdbusd.c - get kevents from the kernel and send it to dbus
 *
 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.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 version 2 of the License.
 *
 *      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.,
 *      675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/user.h>
#include <linux/netlink.h>

#define DEBUG 1

#ifdef DEBUG
#define dbg(format, arg...)                                             \
        do {                                                            \
                printf("%s: " format "\n", __FUNCTION__ , ## arg);      \
        } while (0)
#else
#define dbg(format, arg...)     do {} while (0)
#endif

#define strfieldcpy(to, from) \
do { \
        to[sizeof(to)-1] = '\0'; \
        strncpy(to, from, sizeof(to)-1); \
} while (0)

#define strfieldcat(to, from) \
do { \
        to[sizeof(to)-1] = '\0'; \
        strncat(to, from, sizeof(to) - strlen(to)-1); \
} while (0)

int main(int argc, char *argv[])
{
        int sock;
        struct sockaddr_nl snl;
        int retval;

        if (getuid() != 0) {
                dbg("need to be root, exit");
                exit(1);
        }

        memset(&snl, 0x00, sizeof(struct sockaddr_nl));
        snl.nl_family = AF_NETLINK;
        snl.nl_pid = getpid();
        snl.nl_groups = 0xfffffffffffffff;

        sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
        if (sock == -1) {
                dbg("error getting socket, exit");
                exit(1);
        }

        retval = bind(sock, (struct sockaddr *) &snl,
                      sizeof(struct sockaddr_nl));
        if (retval < 0) {
                dbg("bind failed, exit");
                goto exit;
        }

        while (1) {
                char buf[1024];
                char object[256];
                char *signal;
                char *pos;
                int len;

                len = recv(sock, &buf, sizeof(buf), 0);
                if (len <  0) {
                        dbg("error receiving message");
                        continue;
                }

                buf[len] = '\0';
                printf( "received %d bytes. message starts with %s", len, &buf[0] );

        }

exit:
        close(sock);
        exit(1);
}