#include <sys/un.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
+#include <linux/types.h>
#include <linux/netlink.h>
#include "list.h"
#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)
if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
pass_env_to_socket(&name_loop->name[strlen("socket:")], msg->devpath, msg->action);
else
- run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
+ if (run_program(name_loop->name, udev.subsystem, NULL, 0, NULL,
+ (udev_log_priority >= LOG_INFO)))
+ retval = -1;
}
}
udev_cleanup_device(&udev);
- return 0;
+ return retval;
+}
+
+enum event_state {
+ EVENT_QUEUED,
+ EVENT_FINISHED,
+ EVENT_FAILED,
+};
+
+static void export_event_state(struct uevent_msg *msg, enum event_state state)
+{
+ char filename[PATH_SIZE];
+ char filename_failed[PATH_SIZE];
+ char target[PATH_SIZE];
+ size_t start, end, i;
+ struct uevent_msg *loop_msg;
+
+ /* add location of queue files */
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/", sizeof(filename));
+ start = strlcat(filename, EVENT_QUEUE_DIR, sizeof(filename));
+ end = strlcat(filename, msg->devpath, sizeof(filename));
+ if (end > sizeof(filename))
+ end = sizeof(filename);
+
+ /* replace '/' to transform path into a filename */
+ for (i = start+1; i < end; i++)
+ if (filename[i] == '/')
+ filename[i] = PATH_TO_NAME_CHAR;
+
+ /* add location of failed files */
+ strlcpy(filename_failed, udev_root, sizeof(filename_failed));
+ strlcat(filename_failed, "/", sizeof(filename_failed));
+ start = strlcat(filename_failed, EVENT_FAILED_DIR, sizeof(filename_failed));
+ end = strlcat(filename_failed, msg->devpath, sizeof(filename_failed));
+ if (end > sizeof(filename_failed))
+ end = sizeof(filename_failed);
+
+ /* replace '/' to transform path into a filename */
+ for (i = start+1; i < end; i++)
+ if (filename_failed[i] == '/')
+ filename_failed[i] = PATH_TO_NAME_CHAR;
+
+ switch (state) {
+ case EVENT_QUEUED:
+ unlink(filename_failed);
+ delete_path(filename_failed);
+
+ strlcpy(target, sysfs_path, sizeof(target));
+ strlcat(target, msg->devpath, sizeof(target));
+ create_path(filename);
+ symlink(target, filename);
+ return;
+ case EVENT_FINISHED:
+ case EVENT_FAILED:
+ unlink(filename_failed);
+ delete_path(filename_failed);
+
+ /* don't remove, if events for the same path are still pending */
+ list_for_each_entry(loop_msg, &running_list, node)
+ if (loop_msg->devpath && strcmp(loop_msg->devpath, msg->devpath) == 0)
+ return;
+
+ /* move failed events to the failed directory */
+ if (state == EVENT_FAILED) {
+ create_path(filename_failed);
+ rename(filename, filename_failed);
+ } else {
+ unlink(filename);
+ }
+
+ /* clean up the queue directory */
+ delete_path(filename);
+
+ return;
+ }
+}
+
+static void msg_queue_delete(struct uevent_msg *msg)
+{
+ list_del(&msg->node);
+
+ /* mark as failed, if add event returns non-zero */
+ if (msg->exitstatus && strcmp(msg->action, "add") == 0)
+ export_event_state(msg, EVENT_FAILED);
+ else
+ export_event_state(msg, EVENT_FINISHED);
+
+ free(msg);
}
-/* runs event and removes event from run queue when finished */
static void udev_event_run(struct uevent_msg *msg)
{
pid_t pid;
+ int retval;
pid = fork();
switch (pid) {
logging_init("udevd-event");
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
- udev_event_process(msg);
+ retval = udev_event_process(msg);
info("seq %llu finished", msg->seqnum);
logging_close();
+ if (retval)
+ exit(1);
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);
+
+ export_event_state(msg, EVENT_QUEUED);
+
+ /* 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;
struct uevent_msg *loop_msg;
int childs_count = 0;
- 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);
return 1;
}
- if (loop_msg->devpath == NULL)
- continue;
/* return running parent/child device event */
if (compare_devpath(loop_msg->devpath, msg->devpath) != 0) {
}
/* 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);
}
}
msg->envp[i++] = "UDEVD_EVENT=1";
msg->envp[i] = NULL;
+ if (!msg->devpath) {
+ info("DEVPATH missing, ignore message");
+ free(msg);
+ return NULL;
+ }
+
return msg;
}
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;
}
write(signal_pipe[WRITE_END], "", 1);
}
-static void udev_done(int pid)
+static void udev_done(int pid, int exitstatus)
{
/* find msg associated with pid and delete it */
struct uevent_msg *msg;
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 with %i, %ld seconds old", msg->seqnum, msg->pid,
+ exitstatus, time(NULL) - msg->queue_time);
+ msg->exitstatus = exitstatus;
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;
}
static void reap_sigchilds(void)
{
pid_t pid;
+ int status;
while (1) {
- pid = waitpid(-1, NULL, WNOHANG);
+ pid = waitpid(-1, &status, WNOHANG);
if (pid <= 0)
break;
- udev_done(pid);
+ if (WIFEXITED(status))
+ status = WEXITSTATUS(status);
+ else if (WIFSIGNALED(status))
+ status = WTERMSIG(status) + 128;
+ else
+ status = 0;
+ udev_done(pid, status);
}
}
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();
}
}