4 * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <sys/socket.h>
30 #include <sys/select.h>
31 #include <linux/netlink.h>
32 #include <asm/types.h>
37 static int uevent_netlink_sock;
38 static int udev_monitor_sock;
40 static int init_udev_monitor_socket(void)
42 struct sockaddr_un saddr;
44 const int feature_on = 1;
47 memset(&saddr, 0x00, sizeof(saddr));
48 saddr.sun_family = AF_LOCAL;
49 /* use abstract namespace for socket path */
50 strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
51 addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
53 udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
54 if (udev_monitor_sock == -1) {
55 fprintf(stderr, "error getting socket, %s\n", strerror(errno));
59 /* the bind takes care of ensuring only one copy running */
60 retval = bind(udev_monitor_sock, (struct sockaddr *) &saddr, addrlen);
62 fprintf(stderr, "bind failed, %s\n", strerror(errno));
63 close(udev_monitor_sock);
67 /* enable receiving of the sender credentials */
68 setsockopt(udev_monitor_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
73 static int init_uevent_netlink_sock(void)
75 struct sockaddr_nl snl;
78 memset(&snl, 0x00, sizeof(struct sockaddr_nl));
79 snl.nl_family = AF_NETLINK;
80 snl.nl_pid = getpid();
81 snl.nl_groups = 0xffffffff;
83 uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
84 if (uevent_netlink_sock == -1) {
85 fprintf(stderr, "error getting socket, %s\n", strerror(errno));
89 retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
90 sizeof(struct sockaddr_nl));
92 fprintf(stderr, "bind failed, %s\n", strerror(errno));
93 close(uevent_netlink_sock);
94 uevent_netlink_sock = -1;
101 int main(int argc, char *argv[])
109 printf("need to be root, exit\n");
113 if (argc == 2 && strstr(argv[1], "--env"))
116 init_uevent_netlink_sock();
117 init_udev_monitor_socket();
120 FD_SET(uevent_netlink_sock, &readfds);
121 FD_SET(udev_monitor_sock, &readfds);
122 maxsockplus = udev_monitor_sock+1;
125 static char buf[UEVENT_BUFFER_SIZE*2];
130 workreadfds = readfds;
132 retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
135 fprintf(stderr, "error receiving uevent message\n");
139 if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
140 buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
142 fprintf(stderr, "error receiving uevent message\n");
145 printf("UEVENT[%i] %s\n", time(NULL), buf);
148 if (FD_ISSET(udev_monitor_sock, &workreadfds)) {
149 buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
151 fprintf(stderr, "error receiving udev message\n");
154 printf("UDEV [%i] %s\n", time(NULL), buf);
160 /* print environment */
164 /* start of payload */
165 bufpos = strlen(buf) + 1;
167 while (bufpos < (size_t)buflen) {
172 keylen = strlen(key);
176 bufpos += keylen + 1;
182 close(uevent_netlink_sock);
183 close(udev_monitor_sock);