*/
#include <sys/types.h>
-#include <sys/ipc.h>
-#include <sys/msg.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/un.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
+#include <time.h>
#include "udev.h"
+#include "udev_version.h"
#include "udevd.h"
#include "logging.h"
+unsigned char logname[42];
+
static inline char *get_action(void)
{
char *action;
return seqnum;
}
-static int build_hotplugmsg(struct hotplug_msg **ppmsg, char *action,
+static int build_hotplugmsg(struct hotplug_msg *msg, char *action,
char *devpath, char *subsystem, int seqnum)
{
- struct hotplug_msg *pmsg;
-
- pmsg = malloc(sizeof(struct hotplug_msg));
- pmsg->mtype = HOTPLUGMSGTYPE;
- pmsg->seqnum = seqnum;
- strncpy(pmsg->action, action, 8);
- strncpy(pmsg->devpath, devpath, 128);
- strncpy(pmsg->subsystem, subsystem, 16);
- *ppmsg = pmsg;
+ memset(msg, 0x00, sizeof(*msg));
+ strfieldcpy(msg->magic, UDEV_MAGIC);
+ msg->seqnum = seqnum;
+ strncpy(msg->action, action, 8);
+ strncpy(msg->devpath, devpath, 128);
+ strncpy(msg->subsystem, subsystem, 16);
return sizeof(struct hotplug_msg);
}
-static void free_hotplugmsg(struct hotplug_msg *pmsg)
+static int start_daemon(void)
{
- free(pmsg);
+ pid_t pid;
+ pid_t child_pid;
+
+ pid = fork();
+ switch (pid) {
+ case 0:
+ /* helper child */
+ child_pid = fork();
+ switch (child_pid) {
+ case 0:
+ /* daemon */
+ setsid();
+ chdir("/");
+ execl(UDEVD_BIN, "udevd", NULL);
+ dbg("exec of daemon failed");
+ exit(1);
+ case -1:
+ dbg("fork of daemon failed");
+ return -1;
+ default:
+ exit(0);
+ }
+ break;
+ case -1:
+ dbg("fork of helper failed");
+ return -1;
+ default:
+ wait(NULL);
+ }
+ return 0;
}
int main(int argc, char* argv[])
{
- int msgid;
- key_t key;
- struct msqid_ds msg_queue;
- struct msgbuf *pmsg;
+ struct hotplug_msg message;
char *action;
char *devpath;
char *subsystem;
int seq;
int retval = -EINVAL;
int size;
+ int loop;
+ struct timespec tspec;
+ int sock;
+ struct sockaddr_un saddr;
+
+#ifdef DEBUG
+ init_logging("udevsend");
+#endif
subsystem = argv[1];
if (subsystem == NULL) {
}
seq = atoi(seqnum);
- key = ftok(DEFAULT_EXEC_PROGRAM, IPC_KEY_ID);
- size = build_hotplugmsg( (struct hotplug_msg**) &pmsg, action, devpath, subsystem, seq);
- msgid = msgget(key, IPC_CREAT);
- if (msgid == -1) {
- dbg("open ipc queue error");
+ sock = socket(AF_LOCAL, SOCK_STREAM, 0);
+ if (sock == -1) {
+ dbg("error getting socket");
goto exit;
}
- /* get state of queue */
- retval = msgctl(msgid, IPC_STAT, &msg_queue);
- if (retval == -1) {
- dbg("error getting info on ipc queue");
- goto exit;
+ memset(&saddr, 0x00, sizeof(saddr));
+ saddr.sun_family = AF_LOCAL;
+ strcpy(saddr.sun_path, UDEVD_SOCK);
+
+ /* try to connect, if it fails start daemon */
+ retval = connect(sock, (struct sockaddr *) &saddr, sizeof(saddr));
+ if (retval != -1) {
+ goto send;
+ } else {
+ dbg("connect failed, try starting daemon...");
+ retval = start_daemon();
+ if (retval == 0) {
+ dbg("daemon started");
+ } else {
+ dbg("error starting daemon");
+ goto exit;
+ }
+ }
+
+ /* try to connect while daemon to starts */
+ tspec.tv_sec = 0;
+ tspec.tv_nsec = 100000000; /* 100 millisec */
+ loop = UDEVSEND_CONNECT_RETRY;
+ while (loop--) {
+ retval = connect(sock, (struct sockaddr *) &saddr, sizeof(saddr));
+ if (retval != -1)
+ goto send;
+ else
+ dbg("retry to connect %d",
+ UDEVSEND_CONNECT_RETRY - loop);
+ nanosleep(&tspec, NULL);
}
- if (msg_queue.msg_qnum > 0)
- dbg("%li messages already in the ipc queue", msg_queue.msg_qnum);
+ dbg("error connecting to daemon, start daemon failed");
+ goto exit;
- retval = msgsnd(msgid, pmsg, size, 0);
- free_hotplugmsg( (struct hotplug_msg*) pmsg);
+send:
+ size = build_hotplugmsg(&message, action, devpath, subsystem, seq);
+ retval = send(sock, &message, size, 0);
if (retval == -1) {
- dbg("send ipc message error");
+ dbg("error sending message");
+ close (sock);
goto exit;
}
+ close (sock);
return 0;
exit:
- if (retval > 0)
- retval = 0;
-
- return retval;
+ return 1;
}