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");