#include <linux/types.h>
#include <linux/netlink.h>
-#include "list.h"
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "udev_version.h"
#include "udev_rules.h"
-#include "udev_utils.h"
#include "udevd.h"
-#include "logging.h"
-struct udev_rules rules;
+static struct udev_rules rules;
static int udevd_sock;
static int uevent_netlink_sock;
static int inotify_fd;
static int udev_event_process(struct uevent_msg *msg)
{
struct sigaction act;
- struct udevice udev;
- struct name_entry *name_loop;
+ struct udevice *udev;
int i;
int retval;
act.sa_flags = 0;
sigaction(SIGALRM, &act, NULL);
+ /* reset to default */
+ act.sa_handler = SIG_DFL;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+ sigaction(SIGCHLD, &act, NULL);
+ sigaction(SIGHUP, &act, NULL);
+
/* trigger timeout to prevent hanging processes */
alarm(UDEV_ALARM_TIMEOUT);
- /* reconstruct env from message */
+ /* reconstruct event environment from message */
for (i = 0; msg->envp[i]; i++)
putenv(msg->envp[i]);
- udev_init_device(&udev, msg->devpath, msg->subsystem, msg->action);
- retval = udev_process_event(&rules, &udev);
+ udev = udev_device_init();
+ if (udev == NULL)
+ return -1;
+ strlcpy(udev->action, msg->action, sizeof(udev->action));
+ sysfs_device_set_values(udev->dev, msg->devpath, msg->subsystem);
+ udev->devt = msg->devt;
+
+ retval = udev_device_event(&rules, udev);
/* run programs collected by RUN-key*/
- if (!retval) {
- list_for_each_entry(name_loop, &udev.run_list, node) {
+ if (retval == 0 && !udev->ignore_device && udev_run) {
+ struct name_entry *name_loop;
+
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev->run_list, node) {
if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
- pass_env_to_socket(&name_loop->name[strlen("socket:")], msg->devpath, msg->action);
- else
- if (run_program(name_loop->name, udev.subsystem, NULL, 0, NULL,
+ pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, udev->action);
+ else {
+ char program[PATH_SIZE];
+
+ strlcpy(program, name_loop->name, sizeof(program));
+ udev_rules_apply_format(udev, program, sizeof(program));
+ if (run_program(program, udev->dev->subsystem, NULL, 0, NULL,
(udev_log_priority >= LOG_INFO)))
retval = -1;
+ }
}
}
- udev_cleanup_device(&udev);
-
+ udev_device_cleanup(udev);
return retval;
}
switch (state) {
case EVENT_QUEUED:
unlink(filename_failed);
+ delete_path(filename_failed);
strlcpy(target, sysfs_path, sizeof(target));
strlcat(target, msg->devpath, sizeof(target));
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 */
+ /* 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;
- unlink(filename);
- return;
- case EVENT_FAILED:
- create_path(filename_failed);
- rename(filename, filename_failed);
+
+ list_for_each_entry(loop_msg, &exec_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;
}
}
/* child */
close(uevent_netlink_sock);
close(udevd_sock);
- if (inotify_fd > 0)
+ if (inotify_fd >= 0)
close(inotify_fd);
close(signal_pipe[READ_END]);
close(signal_pipe[WRITE_END]);
logging_init("udevd-event");
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
+
retval = udev_event_process(msg);
info("seq %llu finished", msg->seqnum);
static void msg_queue_insert(struct uevent_msg *msg)
{
+ char filename[PATH_SIZE];
+ int fd;
+
msg->queue_time = time(NULL);
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
+ fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
+ if (fd >= 0) {
+ char str[32];
+ int len;
+
+ len = sprintf(str, "%llu\n", msg->seqnum);
+ write(fd, str, len);
+ close(fd);
+ }
+
export_event_state(msg, EVENT_QUEUED);
/* run all events with a timeout set immediately */
static int running_processes(void)
{
int f;
- static char buf[4096];
+ char buf[32768];
int len;
int running;
const char *pos;
msg->envp[i++] = "UDEVD_EVENT=1";
msg->envp[i] = NULL;
- if (!msg->devpath) {
- info("DEVPATH missing, ignore message");
+ if (msg->devpath == NULL || msg->action == NULL) {
+ info("DEVPATH or ACTION missing, ignore message");
free(msg);
return NULL;
}
-
return msg;
}
/* receive the udevd message from userspace */
-static struct uevent_msg *get_udevd_msg(void)
+static void get_udevd_msg(void)
{
- static struct udevd_msg usend_msg;
- struct uevent_msg *msg;
+ struct udevd_msg ctrl_msg;
ssize_t size;
struct msghdr smsg;
struct cmsghdr *cmsg;
struct iovec iov;
struct ucred *cred;
char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
- int envbuf_size;
int *intval;
- memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
- iov.iov_base = &usend_msg;
+ memset(&ctrl_msg, 0x00, sizeof(struct udevd_msg));
+ iov.iov_base = &ctrl_msg;
iov.iov_len = sizeof(struct udevd_msg);
memset(&smsg, 0x00, sizeof(struct msghdr));
size = recvmsg(udevd_sock, &smsg, 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive udevd message: %s", strerror(errno));
- return NULL;
+ err("unable to receive user udevd message: %s", strerror(errno));
+ return;
}
cmsg = CMSG_FIRSTHDR(&smsg);
cred = (struct ucred *) CMSG_DATA(cmsg);
if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
err("no sender credentials received, message ignored");
- return NULL;
+ return;
}
if (cred->uid != 0) {
err("sender uid=%i, message ignored", cred->uid);
- return NULL;
+ return;
}
- if (strncmp(usend_msg.magic, UDEV_MAGIC, sizeof(UDEV_MAGIC)) != 0 ) {
- err("message magic '%s' doesn't match, ignore it", usend_msg.magic);
- return NULL;
+ if (strncmp(ctrl_msg.magic, UDEV_MAGIC, sizeof(UDEV_MAGIC)) != 0 ) {
+ err("message magic '%s' doesn't match, ignore it", ctrl_msg.magic);
+ return;
}
- switch (usend_msg.type) {
- case UDEVD_UEVENT_UDEVSEND:
- case UDEVD_UEVENT_INITSEND:
- info("udevd event message received");
- envbuf_size = size - offsetof(struct udevd_msg, envbuf);
- dbg("envbuf_size=%i", envbuf_size);
- msg = get_msg_from_envbuf(usend_msg.envbuf, envbuf_size);
- if (msg == NULL)
- return NULL;
- msg->type = usend_msg.type;
- return msg;
+ switch (ctrl_msg.type) {
case UDEVD_STOP_EXEC_QUEUE:
info("udevd message (STOP_EXEC_QUEUE) received");
stop_exec_q = 1;
msg_queue_manager();
break;
case UDEVD_SET_LOG_LEVEL:
- intval = (int *) usend_msg.envbuf;
+ intval = (int *) ctrl_msg.envbuf;
info("udevd message (SET_LOG_PRIORITY) received, udev_log_priority=%i", *intval);
udev_log_priority = *intval;
sprintf(udev_log, "UDEV_LOG=%i", udev_log_priority);
putenv(udev_log);
break;
case UDEVD_SET_MAX_CHILDS:
- intval = (int *) usend_msg.envbuf;
+ intval = (int *) ctrl_msg.envbuf;
info("udevd message (UDEVD_SET_MAX_CHILDS) received, max_childs=%i", *intval);
max_childs = *intval;
break;
default:
dbg("unknown message type");
}
- return NULL;
}
/* receive the kernel user event message and do some sanity checks */
struct uevent_msg *msg;
int bufpos;
ssize_t size;
- static char buffer[UEVENT_BUFFER_SIZE + 512];
+ static char buffer[UEVENT_BUFFER_SIZE+512];
char *pos;
size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive udevd message: %s", strerror(errno));
+ err("unable to receive kernel netlink message: %s", strerror(errno));
return NULL;
}
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
snl.nl_family = AF_NETLINK;
snl.nl_pid = getpid();
- snl.nl_groups = 0xffffffff;
+ snl.nl_groups = 1;
uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (uevent_netlink_sock == -1) {
return 0;
}
+static void export_initial_seqnum(void)
+{
+ char filename[PATH_SIZE];
+ int fd;
+ char seqnum[32];
+ ssize_t len = 0;
+
+ strlcpy(filename, sysfs_path, sizeof(filename));
+ strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
+ fd = open(filename, O_RDONLY);
+ if (fd >= 0) {
+ len = read(fd, seqnum, sizeof(seqnum)-1);
+ close(fd);
+ }
+ if (len <= 0) {
+ strcpy(seqnum, "0\n");
+ len = 3;
+ }
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
+ create_path(filename);
+ fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
+ if (fd >= 0) {
+ write(fd, seqnum, len);
+ close(fd);
+ }
+}
+
int main(int argc, char *argv[], char *envp[])
{
int retval;
if (fd < 0)
err("fatal, could not open /dev/null: %s", strerror(errno));
- udev_init_config();
+ udev_config_init();
dbg("version %s", UDEV_VERSION);
if (getuid() != 0) {
}
/* parse the rules and keep it in memory */
+ sysfs_init();
udev_rules_init(&rules, 1);
+ export_initial_seqnum();
+
if (daemonize) {
pid_t pid;
err("error getting pipes: %s", strerror(errno));
goto exit;
}
- retval = fcntl(signal_pipe[READ_END], F_SETFL, O_NONBLOCK);
+
+ retval = fcntl(signal_pipe[READ_END], F_GETFL, 0);
if (retval < 0) {
err("error fcntl on read pipe: %s", strerror(errno));
goto exit;
}
- retval = fcntl(signal_pipe[WRITE_END], F_SETFL, O_NONBLOCK);
+ retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK);
+ if (retval < 0) {
+ err("error fcntl on read pipe: %s", strerror(errno));
+ goto exit;
+ }
+
+ retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0);
+ if (retval < 0) {
+ err("error fcntl on write pipe: %s", strerror(errno));
+ goto exit;
+ }
+ retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK);
if (retval < 0) {
err("error fcntl on write pipe: %s", strerror(errno));
goto exit;
/* watch rules directory */
inotify_fd = inotify_init();
- if (inotify_fd > 0)
+ if (inotify_fd >= 0)
inotify_add_watch(inotify_fd, udev_rules_filename, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ else if (errno == ENOSYS)
+ err("the kernel does not support inotify, udevd can't monitor configuration file changes");
+ else
+ err("inotify_init failed: %s", strerror(errno));
/* maximum limit of forked childs */
value = getenv("UDEVD_MAX_CHILDS");
FD_SET(signal_pipe[READ_END], &readfds);
FD_SET(udevd_sock, &readfds);
FD_SET(uevent_netlink_sock, &readfds);
- if (inotify_fd > 0)
+ if (inotify_fd >= 0)
FD_SET(inotify_fd, &readfds);
fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
}
/* get user socket message */
- if (FD_ISSET(udevd_sock, &readfds)) {
- msg = get_udevd_msg();
- if (msg) {
- if (msg->type == UDEVD_UEVENT_UDEVSEND && msg->seqnum != 0) {
- info("skip non-kernel message with SEQNUM");
- free(msg);
- } else
- msg_queue_insert(msg);
- }
- }
+ if (FD_ISSET(udevd_sock, &readfds))
+ get_udevd_msg();
/* get kernel netlink message */
if (FD_ISSET(uevent_netlink_sock, &readfds)) {
}
/* rules directory inotify watch */
- if ((inotify_fd > 0) && FD_ISSET(inotify_fd, &readfds)) {
+ if ((inotify_fd >= 0) && FD_ISSET(inotify_fd, &readfds)) {
int nbytes;
/* discard all possible events, we can just reload the config */
/* rules changed, set by inotify or a signal*/
if (reload_config) {
reload_config = 0;
- udev_rules_close(&rules);
+ udev_rules_cleanup(&rules);
udev_rules_init(&rules, 1);
}
}
exit:
- udev_rules_close(&rules);
+ udev_rules_cleanup(&rules);
+ sysfs_cleanup();
- if (signal_pipe[READ_END] > 0)
+ if (signal_pipe[READ_END] >= 0)
close(signal_pipe[READ_END]);
- if (signal_pipe[WRITE_END] > 0)
+ if (signal_pipe[WRITE_END] >= 0)
close(signal_pipe[WRITE_END]);
- if (udevd_sock > 0)
+ if (udevd_sock >= 0)
close(udevd_sock);
- if (inotify_fd > 0)
+ if (inotify_fd >= 0)
close(inotify_fd);
- if (uevent_netlink_sock > 0)
+ if (uevent_netlink_sock >= 0)
close(uevent_netlink_sock);
logging_close();
~ianmdlvl / elogind.git / blobdiff