6 * Copyright (C) 2004 Ling, Xiaofeng <xiaofeng.ling@intel.com>
7 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation version 2 of the License.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <sys/types.h>
26 #include <sys/socket.h>
36 #include <linux/stddef.h>
40 #include "udev_version.h"
45 unsigned char logname[LOGNAME_SIZE];
46 void log_message (int level, const char *format, ...)
50 va_start(args, format);
51 vsyslog(level, format, args);
56 static int build_hotplugmsg(struct hotplug_msg *msg, char *action,
57 char *devpath, char *subsystem, int seqnum)
59 memset(msg, 0x00, sizeof(*msg));
60 strfieldcpy(msg->magic, UDEV_MAGIC);
62 strfieldcpy(msg->action, action);
63 strfieldcpy(msg->devpath, devpath);
64 strfieldcpy(msg->subsystem, subsystem);
65 return sizeof(struct hotplug_msg);
68 static int start_daemon(void)
83 execl(UDEVD_BIN, "udevd", NULL);
84 dbg("exec of daemon failed");
87 dbg("fork of daemon failed");
94 dbg("fork of helper failed");
102 int main(int argc, char* argv[])
104 struct hotplug_msg msg;
113 struct timespec tspec;
115 struct sockaddr_un saddr;
117 int started_daemon = 0;
120 init_logging("udevsend");
122 dbg("version %s", UDEV_VERSION);
124 subsystem = get_subsystem(argv[1]);
125 if (subsystem == NULL) {
129 dbg("subsystem = '%s'", subsystem);
131 devpath = get_devpath();
132 if (devpath == NULL) {
136 dbg("DEVPATH = '%s'", devpath);
138 action = get_action();
139 if (action == NULL) {
143 dbg("ACTION = '%s'", action);
145 seqnum = get_seqnum();
150 dbg("SEQNUM = '%d'", seq);
152 sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
154 dbg("error getting socket");
158 memset(&saddr, 0x00, sizeof(saddr));
159 saddr.sun_family = AF_LOCAL;
160 /* use abstract namespace for socket path */
161 strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
162 addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
164 size = build_hotplugmsg(&msg, action, devpath, subsystem, seq);
166 /* If we can't send, try to start daemon and resend message */
167 loop = UDEVSEND_CONNECT_RETRY;
169 retval = sendto(sock, &msg, size, 0, (struct sockaddr *)&saddr, addrlen);
175 if (errno != ECONNREFUSED) {
176 dbg("error sending message");
180 if (!started_daemon) {
181 dbg("connect failed, try starting daemon...");
182 retval = start_daemon();
184 dbg("error starting daemon");
188 dbg("daemon started");
191 dbg("retry to connect %d", UDEVSEND_CONNECT_RETRY - loop);
193 tspec.tv_nsec = 100000000; /* 100 millisec */
194 nanosleep(&tspec, NULL);