#include "udevd.h"
#include "logging.h"
-/* global variables*/
struct udev_rules rules;
static int udevd_sock;
static int uevent_netlink_sock;
}
#endif
-static void msg_queue_insert(struct uevent_msg *msg)
-{
- list_add(&msg->node, &exec_list);
- msg->queue_time = time(NULL);
- run_exec_q = 1;
-}
-
-static void msg_queue_delete(struct uevent_msg *msg)
-{
- list_del(&msg->node);
- free(msg);
-}
-
static void asmlinkage udev_event_sig_handler(int signum)
{
if (signum == SIGALRM)
return 0;
}
-/* runs event and removes event from run queue when finished */
+static void msg_queue_delete(struct uevent_msg *msg)
+{
+ list_del(&msg->node);
+ free(msg);
+}
+
static void udev_event_run(struct uevent_msg *msg)
{
pid_t pid;
logging_close();
exit(0);
case -1:
- err("fork of child failed");
+ err("fork of child failed: %s", strerror(errno));
msg_queue_delete(msg);
break;
default:
}
}
+static void msg_queue_insert(struct uevent_msg *msg)
+{
+ msg->queue_time = time(NULL);
+
+ /* run all events with a timeout set immediately */
+ if (msg->timeout != 0) {
+ list_add_tail(&msg->node, &running_list);
+ udev_event_run(msg);
+ return;
+ }
+
+ list_add_tail(&msg->node, &exec_list);
+ run_exec_q = 1;
+}
+
+/* runs event and removes event from run queue when finished */
static int running_processes(void)
{
int f;
if (msg->devpath == NULL)
return 0;
- /* skip any events with a timeout set */
- if (msg->timeout != 0)
- return 0;
-
list_for_each_entry(loop_msg, &running_list, node) {
if (limit && childs_count++ > limit) {
dbg("%llu, maximum number (%i) of child reached", msg->seqnum, childs_count);
}
/* exec queue management routine executes the events and serializes events in the same sequence */
-static void exec_queue_manager(void)
+static void msg_queue_manager(void)
{
struct uevent_msg *loop_msg;
struct uevent_msg *tmp_msg;
running = running_processes_in_session(sid, max_childs_running+10);
dbg("at least %d processes running in session", running);
if (running >= max_childs_running) {
- dbg("delay seq %llu, cause too many processes already running",
- loop_msg->seqnum);
+ dbg("delay seq %llu, too many processes already running", loop_msg->seqnum);
return;
}
}
- if (running_with_devpath(loop_msg, max_childs) == 0) {
- /* move event to run list */
- list_move_tail(&loop_msg->node, &running_list);
- udev_event_run(loop_msg);
- running++;
- dbg("moved seq %llu to running list", loop_msg->seqnum);
- } else
+ /* don't run two processes for the same devpath and wait for the parent*/
+ if (running_with_devpath(loop_msg, max_childs)) {
dbg("delay seq %llu (%s)", loop_msg->seqnum, loop_msg->devpath);
+ continue;
+ }
+
+ /* move event to run list */
+ list_move_tail(&loop_msg->node, &running_list);
+ udev_event_run(loop_msg);
+ running++;
+ dbg("moved seq %llu to running list", loop_msg->seqnum);
}
}
size = recvmsg(udevd_sock, &smsg, 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive udevd message");
+ err("unable to receive udevd message: %s", strerror(errno));
return NULL;
}
cmsg = CMSG_FIRSTHDR(&smsg);
case UDEVD_START_EXEC_QUEUE:
info("udevd message (START_EXEC_QUEUE) received");
stop_exec_q = 0;
- exec_queue_manager();
+ msg_queue_manager();
break;
case UDEVD_SET_LOG_LEVEL:
intval = (int *) usend_msg.envbuf;
size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive udevd message");
+ err("unable to receive udevd message: %s", strerror(errno));
return NULL;
}
list_for_each_entry(msg, &running_list, node) {
if (msg->pid == pid) {
- if (msg->queue_time)
- info("seq %llu, pid [%d] exit, %ld seconds old", msg->seqnum, msg->pid, time(NULL) - msg->queue_time);
- else
- info("seq 0, pid [%d] exit", msg->pid);
+ info("seq %llu, pid [%d] exit, %ld seconds old", msg->seqnum, msg->pid, time(NULL) - msg->queue_time);
msg_queue_delete(msg);
- /* we want to run the exec queue manager since there may
- * be events waiting with the devpath of the one that
- * just finished
- */
+ /* there may be events waiting with the same devpath */
run_exec_q = 1;
return;
}
udevd_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (udevd_sock == -1) {
- err("error getting socket, %s", strerror(errno));
+ err("error getting socket: %s", strerror(errno));
return -1;
}
/* the bind takes care of ensuring only one copy running */
retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
- err("bind failed, %s", strerror(errno));
+ err("bind failed: %s", strerror(errno));
return -1;
}
uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (uevent_netlink_sock == -1) {
- err("error getting socket, %s", strerror(errno));
+ err("error getting socket: %s", strerror(errno));
return -1;
}
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl, sizeof(struct sockaddr_nl));
if (retval < 0) {
- err("bind failed, %s", strerror(errno));
+ err("bind failed: %s", strerror(errno));
close(uevent_netlink_sock);
uevent_netlink_sock = -1;
return -1;
logging_init("udevd");
if (fd < 0)
- err("fatal, could not open /dev/null");
+ err("fatal, could not open /dev/null: %s", strerror(errno));
udev_init_config();
dbg("version %s", UDEV_VERSION);
/* init sockets to receive events */
if (init_udevd_socket() < 0) {
if (errno == EADDRINUSE) {
- dbg("another udevd running, exit");
+ err("another udevd running, exit");
rc = 1;
} else {
- dbg("error initializing udevd socket: %s", strerror(errno));
+ err("error initializing udevd socket: %s", strerror(errno));
rc = 2;
}
goto exit;
dbg("daemonized fork running");
break;
case -1:
- err("fork of daemon failed");
+ err("fork of daemon failed: %s", strerror(errno));
rc = 4;
goto exit;
default:
/* OOM_DISABLE == -17 */
fd = open("/proc/self/oom_adj", O_RDWR);
if (fd < 0)
- err("error disabling OOM");
+ err("error disabling OOM: %s", strerror(errno));
else {
write(fd, "-17", 3);
close(fd);
fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
if (fdcount < 0) {
if (errno != EINTR)
- dbg("error in select: %s", strerror(errno));
+ err("error in select: %s", strerror(errno));
continue;
}
if (run_exec_q) {
run_exec_q = 0;
if (!stop_exec_q)
- exec_queue_manager();
+ msg_queue_manager();
}
}