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 start_daemon(void)
71 execl(UDEVD_BIN, "udevd", NULL);
72 dbg("exec of daemon failed");
75 dbg("fork of daemon failed");
82 dbg("fork of helper failed");
85 waitpid(pid, NULL, 0);
90 static void run_udev(const char *subsystem)
98 execl(UDEV_BIN, UDEV_BIN, subsystem, NULL);
99 dbg("exec of child failed");
103 dbg("fork of child failed");
106 waitpid(pid, NULL, 0);
110 int main(int argc, char* argv[])
112 struct hotplug_msg msg;
117 unsigned long long seq;
121 struct sockaddr_un saddr;
123 int started_daemon = 0;
125 logging_init("udevsend");
126 dbg("version %s", UDEV_VERSION);
128 subsystem = get_subsystem(argv[1]);
129 if (subsystem == NULL) {
133 dbg("subsystem = '%s'", subsystem);
135 devpath = get_devpath();
136 if (devpath == NULL) {
140 dbg("DEVPATH = '%s'", devpath);
142 action = get_action();
143 if (action == NULL) {
147 dbg("ACTION = '%s'", action);
149 seqnum = get_seqnum();
153 seq = strtoull(seqnum, NULL, 10);
154 dbg("SEQNUM = '%llu'", seq);
156 sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
158 dbg("error getting socket");
162 set_cloexec_flag(sock, 1);
164 memset(&saddr, 0x00, sizeof(struct sockaddr_un));
165 saddr.sun_family = AF_LOCAL;
166 /* use abstract namespace for socket path */
167 strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
168 addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
170 memset(&msg, 0x00, sizeof(struct hotplug_msg));
171 strcpy(msg.magic, UDEV_MAGIC);
173 strfieldcpy(msg.action, action);
174 strfieldcpy(msg.devpath, devpath);
175 strfieldcpy(msg.subsystem, subsystem);
177 /* If we can't send, try to start daemon and resend message */
178 loop = SEND_WAIT_MAX_SECONDS * SEND_WAIT_LOOP_PER_SECOND;
180 retval = sendto(sock, &msg, sizeof(struct hotplug_msg), 0,
181 (struct sockaddr *)&saddr, addrlen);
187 if (errno != ECONNREFUSED) {
188 dbg("error sending message");
192 if (!started_daemon) {
193 info("starting udevd daemon");
194 retval = start_daemon();
196 info("error starting daemon");
199 dbg("daemon started");
202 dbg("retry to connect %d", SEND_WAIT_MAX_SECONDS * SEND_WAIT_LOOP_PER_SECOND - loop);
203 usleep(1000 * 1000 / SEND_WAIT_LOOP_PER_SECOND);
208 info("unable to connect to event daemon, try to call udev directly");