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/types.h>
32 #include <linux/netlink.h>
36 #include "udev_libc_wrapper.h"
38 static int uevent_netlink_sock;
39 static int udev_monitor_sock;
41 static int init_udev_monitor_socket(void)
43 struct sockaddr_un saddr;
45 const int feature_on = 1;
48 memset(&saddr, 0x00, sizeof(saddr));
49 saddr.sun_family = AF_LOCAL;
50 /* use abstract namespace for socket path */
51 strcpy(&saddr.sun_path[1], "/org/kernel/udev/monitor");
52 addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
54 udev_monitor_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
55 if (udev_monitor_sock == -1) {
56 fprintf(stderr, "error getting socket, %s\n", strerror(errno));
60 /* the bind takes care of ensuring only one copy running */
61 retval = bind(udev_monitor_sock, (struct sockaddr *) &saddr, addrlen);
63 fprintf(stderr, "bind failed, %s\n", strerror(errno));
64 close(udev_monitor_sock);
68 /* enable receiving of the sender credentials */
69 setsockopt(udev_monitor_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
74 static int init_uevent_netlink_sock(void)
76 struct sockaddr_nl snl;
79 memset(&snl, 0x00, sizeof(struct sockaddr_nl));
80 snl.nl_family = AF_NETLINK;
81 snl.nl_pid = getpid();
82 snl.nl_groups = 0xffffffff;
84 uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
85 if (uevent_netlink_sock == -1) {
86 fprintf(stderr, "error getting socket, %s\n", strerror(errno));
90 retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
91 sizeof(struct sockaddr_nl));
93 fprintf(stderr, "bind failed, %s\n", strerror(errno));
94 close(uevent_netlink_sock);
95 uevent_netlink_sock = -1;
102 int main(int argc, char *argv[])
110 printf("need to be root, exit\n");
114 if (argc == 2 && strstr(argv[1], "--env"))
117 init_uevent_netlink_sock();
118 init_udev_monitor_socket();
121 FD_SET(uevent_netlink_sock, &readfds);
122 FD_SET(udev_monitor_sock, &readfds);
123 maxsockplus = udev_monitor_sock+1;
126 static char buf[UEVENT_BUFFER_SIZE*2];
131 workreadfds = readfds;
133 retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
136 fprintf(stderr, "error receiving uevent message\n");
140 if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
141 buflen = recv(uevent_netlink_sock, &buf, sizeof(buf), 0);
143 fprintf(stderr, "error receiving uevent message\n");
146 printf("UEVENT[%i] %s\n", time(NULL), buf);
149 if (FD_ISSET(udev_monitor_sock, &workreadfds)) {
150 buflen = recv(udev_monitor_sock, &buf, sizeof(buf), 0);
152 fprintf(stderr, "error receiving udev message\n");
155 printf("UDEV [%i] %s\n", time(NULL), buf);
161 /* print environment */
165 /* start of payload */
166 bufpos = strlen(buf) + 1;
168 while (bufpos < (size_t)buflen) {
173 keylen = strlen(key);
177 bufpos += keylen + 1;
183 close(uevent_netlink_sock);
184 close(udev_monitor_sock);