#include <sys/time.h>
#include <sys/prctl.h>
#include <sys/socket.h>
+#include <sys/un.h>
#include <sys/signalfd.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/inotify.h>
+#include <sys/utsname.h>
#include "udev.h"
+#include "sd-daemon.h"
#define UDEVD_PRIORITY -4
#define UDEV_PRIORITY -2
}
}
-static bool debug_trace;
static struct udev_rules *rules;
static struct udev_queue_export *udev_queue_export;
static struct udev_ctrl *udev_ctrl;
static struct udev_monitor *monitor;
-static int worker_watch[2];
+static int worker_watch[2] = { -1, -1 };
static pid_t settle_pid;
static bool stop_exec_queue;
static bool reload_config;
-static int max_childs;
-static int childs;
+static int children;
+static int children_max;
+static int exec_delay;
static sigset_t orig_sigmask;
static struct udev_list_node event_list;
static struct udev_list_node worker_list;
};
static struct pollfd pfd[] = {
- [FD_NETLINK] = { .events = POLLIN },
- [FD_WORKER] = { .events = POLLIN },
- [FD_SIGNAL] = { .events = POLLIN },
- [FD_INOTIFY] = { .events = POLLIN },
- [FD_CONTROL] = { .events = POLLIN },
+ [FD_NETLINK] = { .events = POLLIN, .fd = -1 },
+ [FD_WORKER] = { .events = POLLIN, .fd = -1 },
+ [FD_SIGNAL] = { .events = POLLIN, .fd = -1 },
+ [FD_INOTIFY] = { .events = POLLIN, .fd = -1 },
+ [FD_CONTROL] = { .events = POLLIN, .fd = -1 },
};
enum event_state {
const char *devpath;
size_t devpath_len;
const char *devpath_old;
+ dev_t devnum;
+ bool is_block;
+ int ifindex;
};
static struct event *node_to_event(struct udev_list_node *node)
udev_list_node_remove(&event->node);
/* mark as failed, if "add" event returns non-zero */
- if (event->exitcode != 0 && strcmp(udev_device_get_action(event->dev), "add") == 0)
+ if (event->exitcode != 0 && strcmp(udev_device_get_action(event->dev), "remove") != 0)
udev_queue_export_device_failed(udev_queue_export, event->dev);
else
udev_queue_export_device_finished(udev_queue_export, event->dev);
udev_list_node_remove(&worker->node);
udev_monitor_unref(worker->monitor);
- childs--;
+ children--;
info(worker->udev, "worker [%u] cleaned up\n", worker->pid);
free(worker);
}
/* allow the main daemon netlink address to send devices to the worker */
udev_monitor_allow_unicast_sender(worker_monitor, monitor);
udev_monitor_enable_receiving(worker_monitor);
- util_set_fd_cloexec(udev_monitor_get_fd(worker_monitor));
worker = calloc(1, sizeof(struct worker));
- if (worker == NULL)
+ if (worker == NULL) {
+ udev_monitor_unref(worker_monitor);
return;
+ }
/* worker + event reference */
worker->refcount = 2;
worker->udev = event->udev;
/* set timeout to prevent hanging processes */
alarm(UDEV_EVENT_TIMEOUT);
+ if (exec_delay > 0)
+ udev_event->exec_delay = exec_delay;
+
/* apply rules, create node, symlinks */
err = udev_event_execute_rules(udev_event, rules);
if (udev_device_get_event_timeout(dev) >= 0)
alarm(udev_device_get_event_timeout(dev));
- /* execute RUN= */
- if (err == 0 && !udev_event->ignore_device && udev_get_run(udev_event->udev))
- failed = udev_event_execute_run(udev_event,
- &orig_sigmask);
+ if (err == 0)
+ failed = udev_event_execute_run(udev_event, &orig_sigmask);
- /* reset alarm */
alarm(0);
/* apply/restore inotify watch */
/* send processed event back to libudev listeners */
udev_monitor_send_device(worker_monitor, NULL, dev);
- /* send back the result of the event execution */
+ /* send udevd the result of the event execution */
if (err != 0)
msg.exitcode = err;
else if (failed != 0)
worker->event = event;
event->state = EVENT_RUNNING;
udev_list_node_append(&worker->node, &worker_list);
- childs++;
+ children++;
info(event->udev, "seq %llu forked new worker [%u]\n", udev_device_get_seqnum(event->dev), pid);
break;
}
}
-static void event_run(struct event *event)
+static void event_run(struct event *event, bool force)
{
struct udev_list_node *loop;
return;
}
- if (childs >= max_childs) {
- info(event->udev, "maximum number (%i) of childs reached\n", childs);
+ if (!force && children >= children_max) {
+ if (children_max > 1)
+ info(event->udev, "maximum number (%i) of children reached\n", children);
return;
}
worker_new(event);
}
-static void event_queue_insert(struct udev_device *dev)
+static int event_queue_insert(struct udev_device *dev)
{
struct event *event;
event = calloc(1, sizeof(struct event));
if (event == NULL)
- return;
+ return -1;
event->udev = udev_device_get_udev(dev);
event->dev = dev;
event->devpath = udev_device_get_devpath(dev);
event->devpath_len = strlen(event->devpath);
event->devpath_old = udev_device_get_devpath_old(dev);
+ event->devnum = udev_device_get_devnum(dev);
+ event->is_block = (strcmp("block", udev_device_get_subsystem(dev)) == 0);
+ event->ifindex = udev_device_get_ifindex(dev);
udev_queue_export_device_queued(udev_queue_export, dev);
info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),
/* run all events with a timeout set immediately */
if (udev_device_get_timeout(dev) > 0) {
- worker_new(event);
- return;
+ event_run(event, true);
+ return 0;
}
+
+ return 0;
}
static void worker_kill(struct udev *udev, int retain)
struct udev_list_node *loop;
int max;
- if (childs <= retain)
+ if (children <= retain)
return;
- max = childs - retain;
+ max = children - retain;
udev_list_node_foreach(loop, &worker_list) {
struct worker *worker = node_to_worker(loop);
}
}
-static int mem_size_mb(void)
-{
- FILE *f;
- char buf[4096];
- long int memsize = -1;
-
- f = fopen("/proc/meminfo", "r");
- if (f == NULL)
- return -1;
-
- while (fgets(buf, sizeof(buf), f) != NULL) {
- long int value;
-
- if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
- memsize = value / 1024;
- break;
- }
- }
-
- fclose(f);
- return memsize;
-}
-
/* lookup event for identical, parent, child device */
-static int devpath_busy(struct event *event)
+static bool is_devpath_busy(struct event *event)
{
struct udev_list_node *loop;
size_t common;
/* event we checked earlier still exists, no need to check again */
if (loop_event->seqnum == event->delaying_seqnum)
- return 2;
+ return true;
/* found ourself, no later event can block us */
if (loop_event->seqnum >= event->seqnum)
break;
+ /* check major/minor */
+ if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)
+ return true;
+
+ /* check network device ifindex */
+ if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)
+ return true;
+
/* check our old name */
- if (event->devpath_old != NULL)
- if (strcmp(loop_event->devpath, event->devpath_old) == 0) {
- event->delaying_seqnum = loop_event->seqnum;
- return 3;
- }
+ if (event->devpath_old != NULL && strcmp(loop_event->devpath, event->devpath_old) == 0) {
+ event->delaying_seqnum = loop_event->seqnum;
+ return true;
+ }
/* compare devpath */
common = MIN(loop_event->devpath_len, event->devpath_len);
/* identical device event found */
if (loop_event->devpath_len == event->devpath_len) {
+ /* devices names might have changed/swapped in the meantime */
+ if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block))
+ continue;
+ if (event->ifindex != 0 && event->ifindex != loop_event->ifindex)
+ continue;
event->delaying_seqnum = loop_event->seqnum;
- return 4;
+ return true;
}
/* parent device event found */
if (event->devpath[common] == '/') {
event->delaying_seqnum = loop_event->seqnum;
- return 5;
+ return true;
}
/* child device event found */
if (loop_event->devpath[common] == '/') {
event->delaying_seqnum = loop_event->seqnum;
- return 6;
+ return true;
}
/* no matching device */
continue;
}
- return 0;
+ return false;
}
static void events_start(struct udev *udev)
continue;
/* do not start event if parent or child event is still running */
- if (devpath_busy(event) != 0) {
+ if (is_devpath_busy(event)) {
dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath);
continue;
}
- event_run(event);
+ event_run(event, false);
}
}
static void worker_returned(void)
{
- while (1) {
+ for (;;) {
struct worker_message msg;
ssize_t size;
struct udev_list_node *loop;
worker_kill(udev, 0);
}
- i = udev_ctrl_get_set_max_childs(ctrl_msg);
+ i = udev_ctrl_get_set_children_max(ctrl_msg);
if (i >= 0) {
- info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i);
- max_childs = i;
+ info(udev, "udevd message (SET_MAX_CHILDREN) received, children_max=%i\n", i);
+ children_max = i;
}
settle_pid = udev_ctrl_get_settle(ctrl_msg);
/* read inotify messages */
static int handle_inotify(struct udev *udev)
{
- ssize_t nbytes, pos;
+ int nbytes, pos;
char *buf;
struct inotify_event *ev;
ev = (struct inotify_event *)(buf + pos);
if (ev->len) {
- dbg(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
+ const char *s;
+
+ info(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
+ s = strstr(ev->name, ".rules");
+ if (s == NULL)
+ continue;
+ if (strlen(s) != strlen(".rules"))
+ continue;
reload_config = true;
continue;
}
dev = udev_watch_lookup(udev, ev->wd);
if (dev != NULL) {
- dbg(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
+ info(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
if (ev->mask & IN_CLOSE_WRITE) {
char filename[UTIL_PATH_SIZE];
int fd;
udev_exit = true;
break;
case SIGCHLD:
- while (1) {
+ for (;;) {
pid_t pid;
int status;
struct udev_list_node *loop, *tmp;
}
}
-static void startup_log(struct udev *udev)
+static void static_dev_create_from_modules(struct udev *udev)
{
+ struct utsname kernel;
+ char modules[UTIL_PATH_SIZE];
+ char buf[4096];
FILE *f;
- char path[UTIL_PATH_SIZE];
- struct stat statbuf;
- f = fopen("/dev/kmsg", "w");
- if (f != NULL)
- fprintf(f, "<6>udev: starting version " VERSION "\n");
-
- util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), "/class/mem/null", NULL);
- if (lstat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
- const char *depr_str =
- "udev: missing sysfs features; please update the kernel "
- "or disable the kernel's CONFIG_SYSFS_DEPRECATED option; "
- "udev may fail to work correctly";
-
- if (f != NULL)
- fprintf(f, "<3>%s\n", depr_str);
- err(udev, "%s\n", depr_str);
- sleep(15);
+ uname(&kernel);
+ util_strscpyl(modules, sizeof(modules), "/lib/modules/", kernel.release, "/modules.devname", NULL);
+ f = fopen(modules, "r");
+ if (f == NULL)
+ return;
+
+ while (fgets(buf, sizeof(buf), f) != NULL) {
+ char *s;
+ const char *modname;
+ const char *devname;
+ const char *devno;
+ int maj, min;
+ char type;
+ mode_t mode;
+ char filename[UTIL_PATH_SIZE];
+
+ if (buf[0] == '#')
+ continue;
+
+ modname = buf;
+ s = strchr(modname, ' ');
+ if (s == NULL)
+ continue;
+ s[0] = '\0';
+
+ devname = &s[1];
+ s = strchr(devname, ' ');
+ if (s == NULL)
+ continue;
+ s[0] = '\0';
+
+ devno = &s[1];
+ s = strchr(devno, ' ');
+ if (s == NULL)
+ s = strchr(devno, '\n');
+ if (s != NULL)
+ s[0] = '\0';
+ if (sscanf(devno, "%c%u:%u", &type, &maj, &min) != 3)
+ continue;
+
+ if (type == 'c')
+ mode = 0600 | S_IFCHR;
+ else if (type == 'b')
+ mode = 0600 | S_IFBLK;
+ else
+ continue;
+
+ util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/", devname, NULL);
+ util_create_path_selinux(udev, filename);
+ udev_selinux_setfscreatecon(udev, filename, mode);
+ info(udev, "mknod '%s' %c%u:%u\n", filename, type, maj, min);
+ if (mknod(filename, mode, makedev(maj, min)) < 0 && errno == EEXIST)
+ utimensat(AT_FDCWD, filename, NULL, 0);
+ udev_selinux_resetfscreatecon(udev);
+ }
+
+ fclose(f);
+}
+
+static int copy_dev_dir(struct udev *udev, DIR *dir_from, DIR *dir_to, int maxdepth)
+{
+ struct dirent *dent;
+
+ for (dent = readdir(dir_from); dent != NULL; dent = readdir(dir_from)) {
+ struct stat stats;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ if (fstatat(dirfd(dir_from), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0)
+ continue;
+
+ if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) {
+ udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, stats.st_mode & 0777);
+ if (mknodat(dirfd(dir_to), dent->d_name, stats.st_mode, stats.st_rdev) == 0) {
+ fchmodat(dirfd(dir_to), dent->d_name, stats.st_mode & 0777, 0);
+ fchownat(dirfd(dir_to), dent->d_name, stats.st_uid, stats.st_gid, 0);
+ } else {
+ utimensat(dirfd(dir_to), dent->d_name, NULL, 0);
+ }
+ udev_selinux_resetfscreatecon(udev);
+ } else if (S_ISLNK(stats.st_mode)) {
+ char target[UTIL_PATH_SIZE];
+ ssize_t len;
+
+ len = readlinkat(dirfd(dir_from), dent->d_name, target, sizeof(target));
+ if (len <= 0 || len == (ssize_t)sizeof(target))
+ continue;
+ target[len] = '\0';
+ udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFLNK);
+ if (symlinkat(target, dirfd(dir_to), dent->d_name) < 0 && errno == EEXIST)
+ utimensat(dirfd(dir_to), dent->d_name, NULL, AT_SYMLINK_NOFOLLOW);
+ udev_selinux_resetfscreatecon(udev);
+ } else if (S_ISDIR(stats.st_mode)) {
+ DIR *dir2_from, *dir2_to;
+
+ if (maxdepth == 0)
+ continue;
+
+ udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFDIR|0755);
+ mkdirat(dirfd(dir_to), dent->d_name, 0755);
+ udev_selinux_resetfscreatecon(udev);
+
+ dir2_to = fdopendir(openat(dirfd(dir_to), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
+ if (dir2_to == NULL)
+ continue;
+
+ dir2_from = fdopendir(openat(dirfd(dir_from), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
+ if (dir2_from == NULL) {
+ closedir(dir2_to);
+ continue;
+ }
+
+ copy_dev_dir(udev, dir2_from, dir2_to, maxdepth-1);
+
+ closedir(dir2_to);
+ closedir(dir2_from);
+ }
+ }
+
+ return 0;
+}
+
+static void static_dev_create_links(struct udev *udev, DIR *dir)
+{
+ struct stdlinks {
+ const char *link;
+ const char *target;
+ };
+ static const struct stdlinks stdlinks[] = {
+ { "core", "/proc/kcore" },
+ { "fd", "/proc/self/fd" },
+ { "stdin", "/proc/self/fd/0" },
+ { "stdout", "/proc/self/fd/1" },
+ { "stderr", "/proc/self/fd/2" },
+ };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(stdlinks); i++) {
+ struct stat sb;
+
+ if (stat(stdlinks[i].target, &sb) == 0) {
+ udev_selinux_setfscreateconat(udev, dirfd(dir), stdlinks[i].link, S_IFLNK);
+ if (symlinkat(stdlinks[i].target, dirfd(dir), stdlinks[i].link) < 0 && errno == EEXIST)
+ utimensat(dirfd(dir), stdlinks[i].link, NULL, AT_SYMLINK_NOFOLLOW);
+ udev_selinux_resetfscreatecon(udev);
+ }
+ }
+}
+
+static void static_dev_create_from_devices(struct udev *udev, DIR *dir)
+{
+ DIR *dir_from;
+
+ dir_from = opendir(LIBEXECDIR "/devices");
+ if (dir_from == NULL)
+ return;
+ copy_dev_dir(udev, dir_from, dir, 8);
+ closedir(dir_from);
+}
+
+static void static_dev_create(struct udev *udev)
+{
+ DIR *dir;
+
+ dir = opendir(udev_get_dev_path(udev));
+ if (dir == NULL)
+ return;
+
+ static_dev_create_links(udev, dir);
+ static_dev_create_from_devices(udev, dir);
+
+ closedir(dir);
+}
+
+static int mem_size_mb(void)
+{
+ FILE *f;
+ char buf[4096];
+ long int memsize = -1;
+
+ f = fopen("/proc/meminfo", "r");
+ if (f == NULL)
+ return -1;
+
+ while (fgets(buf, sizeof(buf), f) != NULL) {
+ long int value;
+
+ if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
+ memsize = value / 1024;
+ break;
+ }
}
- if (f != NULL)
+ fclose(f);
+ return memsize;
+}
+
+static int convert_db(struct udev *udev)
+{
+ char filename[UTIL_PATH_SIZE];
+ FILE *f;
+ struct udev_enumerate *udev_enumerate;
+ struct udev_list_entry *list_entry;
+
+ /* current database */
+ util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data", NULL);
+ if (access(filename, F_OK) >= 0)
+ return 0;
+
+ /* make sure we do not get here again */
+ util_create_path(udev, filename);
+ mkdir(filename, 0755);
+
+ /* old database */
+ util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/db", NULL);
+ if (access(filename, F_OK) < 0)
+ return 0;
+
+ f = fopen("/dev/kmsg", "w");
+ if (f != NULL) {
+ fprintf(f, "<30>udev[%u]: converting old udev database\n", getpid());
fclose(f);
+ }
+
+ udev_enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate == NULL)
+ return -1;
+ udev_enumerate_scan_devices(udev_enumerate);
+ udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+ struct udev_device *device;
+
+ device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
+ if (device == NULL)
+ continue;
+
+ /* try to find the old database for devices without a current one */
+ if (udev_device_read_db(device, NULL) < 0) {
+ bool have_db;
+ const char *id;
+ struct stat stats;
+ char devpath[UTIL_PATH_SIZE];
+ char from[UTIL_PATH_SIZE];
+
+ have_db = false;
+
+ /* find database in old location */
+ id = udev_device_get_id_filename(device);
+ util_strscpyl(from, sizeof(from), udev_get_dev_path(udev), "/.udev/db/", id, NULL);
+ if (lstat(from, &stats) == 0) {
+ if (!have_db) {
+ udev_device_read_db(device, from);
+ have_db = true;
+ }
+ unlink(from);
+ }
+
+ /* find old database with $subsys:$sysname name */
+ util_strscpyl(from, sizeof(from), udev_get_dev_path(udev),
+ "/.udev/db/", udev_device_get_subsystem(device), ":",
+ udev_device_get_sysname(device), NULL);
+ if (lstat(from, &stats) == 0) {
+ if (!have_db) {
+ udev_device_read_db(device, from);
+ have_db = true;
+ }
+ unlink(from);
+ }
+
+ /* find old database with the encoded devpath name */
+ util_path_encode(udev_device_get_devpath(device), devpath, sizeof(devpath));
+ util_strscpyl(from, sizeof(from), udev_get_dev_path(udev), "/.udev/db/", devpath, NULL);
+ if (lstat(from, &stats) == 0) {
+ if (!have_db) {
+ udev_device_read_db(device, from);
+ have_db = true;
+ }
+ unlink(from);
+ }
+
+ /* write out new database */
+ if (have_db)
+ udev_device_update_db(device);
+ }
+ udev_device_unref(device);
+ }
+ udev_enumerate_unref(udev_enumerate);
+ return 0;
}
int main(int argc, char *argv[])
{
struct udev *udev;
int fd;
+ FILE *f;
sigset_t mask;
- const char *value;
int daemonize = false;
int resolve_names = 1;
static const struct option options[] = {
{ "daemon", no_argument, NULL, 'd' },
- { "debug-trace", no_argument, NULL, 't' },
{ "debug", no_argument, NULL, 'D' },
+ { "children-max", required_argument, NULL, 'c' },
+ { "exec-delay", required_argument, NULL, 'e' },
+ { "resolve-names", required_argument, NULL, 'N' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
- { "resolve-names", required_argument, NULL, 'N' },
{}
};
int rc = 1;
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
- while (1) {
+ /* make sure, that our runtime dir exists and is writable */
+ if (utimensat(AT_FDCWD, udev_get_run_config_path(udev), NULL, 0) < 0) {
+ /* try to create our own subdirectory, do not create parent directories */
+ mkdir(udev_get_run_config_path(udev), 0755);
+
+ if (utimensat(AT_FDCWD, udev_get_run_config_path(udev), NULL, 0) >= 0) {
+ /* directory seems writable now */
+ udev_set_run_path(udev, udev_get_run_config_path(udev));
+ } else {
+ /* fall back to /dev/.udev */
+ char filename[UTIL_PATH_SIZE];
+
+ util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev", NULL);
+ if (udev_set_run_path(udev, filename) == NULL)
+ goto exit;
+ mkdir(udev_get_run_path(udev), 0755);
+ }
+ }
+ /* relabel runtime dir only if it resides below /dev */
+ if (strncmp(udev_get_run_path(udev), udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) == 0)
+ udev_selinux_lsetfilecon(udev, udev_get_run_path(udev), 0755);
+ info(udev, "runtime dir '%s'\n", udev_get_run_path(udev));
+
+ for (;;) {
int option;
- option = getopt_long(argc, argv, "dDthV", options, NULL);
+ option = getopt_long(argc, argv, "c:deDtN:hV", options, NULL);
if (option == -1)
break;
case 'd':
daemonize = true;
break;
- case 't':
- debug_trace = true;
+ case 'c':
+ children_max = strtoul(optarg, NULL, 0);
+ break;
+ case 'e':
+ exec_delay = strtoul(optarg, NULL, 0);
break;
case 'D':
debug = true;
}
break;
case 'h':
- printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--debug] "
- "[--resolve-names=early|late|never] [--version]\n");
+ printf("Usage: udevd OPTIONS\n"
+ " --daemon\n"
+ " --debug\n"
+ " --children-max=<maximum number of workers>\n"
+ " --exec-delay=<seconds to wait before executing RUN=>\n"
+ " --resolve-names=early|late|never\n"
+ " --version\n"
+ " --help\n"
+ "\n");
goto exit;
case 'V':
printf("%s\n", VERSION);
}
}
+ /*
+ * read the kernel commandline, in case we need to get into debug mode
+ * udev.log-priority=<level> syslog priority
+ * udev.children-max=<number of workers> events are fully serialized if set to 1
+ *
+ */
+ f = fopen("/proc/cmdline", "r");
+ if (f != NULL) {
+ char cmdline[4096];
+
+ if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
+ char *pos;
+
+ pos = strstr(cmdline, "udev.log-priority=");
+ if (pos != NULL) {
+ pos += strlen("udev.log-priority=");
+ udev_set_log_priority(udev, util_log_priority(pos));
+ }
+
+ pos = strstr(cmdline, "udev.children-max=");
+ if (pos != NULL) {
+ pos += strlen("udev.children-max=");
+ children_max = strtoul(pos, NULL, 0);
+ }
+
+ pos = strstr(cmdline, "udev.exec-delay=");
+ if (pos != NULL) {
+ pos += strlen("udev.exec-delay=");
+ exec_delay = strtoul(pos, NULL, 0);
+ }
+ }
+ fclose(f);
+ }
+
if (getuid() != 0) {
fprintf(stderr, "root privileges required\n");
err(udev, "root privileges required\n");
goto exit;
}
- /* make sure std{in,out,err} fd's are in a sane state */
+ /* set umask before creating any file/directory */
+ chdir("/");
+ umask(022);
+
+ /* create standard links, copy static nodes, create nodes from modules */
+ static_dev_create(udev);
+ static_dev_create_from_modules(udev);
+
+ /* before opening new files, make sure std{in,out,err} fds are in a sane state */
fd = open("/dev/null", O_RDWR);
if (fd < 0) {
fprintf(stderr, "cannot open /dev/null\n");
if (write(STDERR_FILENO, 0, 0) < 0)
dup2(fd, STDERR_FILENO);
- /* init control socket, bind() ensures, that only one udevd instance is running */
- udev_ctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
+ /* udevadm control socket */
+ if (sd_listen_fds(true) == 1 && sd_is_socket(SD_LISTEN_FDS_START, AF_LOCAL, SOCK_DGRAM, -1))
+ udev_ctrl = udev_ctrl_new_from_fd(udev, SD_LISTEN_FDS_START);
+ else
+ udev_ctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
if (udev_ctrl == NULL) {
- fprintf(stderr, "error initializing control socket");
- err(udev, "error initializing udevd socket");
+ fprintf(stderr, "error initializing udev control socket");
+ err(udev, "error initializing udev control socket");
rc = 1;
goto exit;
}
if (udev_ctrl_enable_receiving(udev_ctrl) < 0) {
- fprintf(stderr, "error binding control socket, seems udevd is already running\n");
- err(udev, "error binding control socket, seems udevd is already running\n");
+ fprintf(stderr, "error binding udev control socket\n");
+ err(udev, "error binding udev control socket\n");
rc = 1;
goto exit;
}
if (udev_get_rules_path(udev) != NULL) {
inotify_add_watch(pfd[FD_INOTIFY].fd, udev_get_rules_path(udev),
- IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
} else {
char filename[UTIL_PATH_SIZE];
+ struct stat statbuf;
inotify_add_watch(pfd[FD_INOTIFY].fd, LIBEXECDIR "/rules.d",
- IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
inotify_add_watch(pfd[FD_INOTIFY].fd, SYSCONFDIR "/udev/rules.d",
- IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
/* watch dynamic rules directory */
- util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
+ util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL);
+ if (stat(filename, &statbuf) != 0) {
+ util_create_path(udev, filename);
+ mkdir(filename, 0755);
+ }
inotify_add_watch(pfd[FD_INOTIFY].fd, filename,
- IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
}
udev_watch_restore(udev);
}
/* unnamed socket from workers to the main daemon */
- if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, worker_watch) < 0) {
+ if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) {
fprintf(stderr, "error getting socketpair\n");
err(udev, "error getting socketpair\n");
rc = 6;
goto exit;
}
pfd[FD_WORKER].fd = worker_watch[READ_END];
- util_set_fd_cloexec(worker_watch[WRITE_END]);
rules = udev_rules_new(udev, resolve_names);
if (rules == NULL) {
goto exit;
}
+ /* if needed, convert old database from earlier udev version */
+ convert_db(udev);
+
+ if (!debug) {
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ }
+ if (fd > STDERR_FILENO)
+ close(fd);
+
if (daemonize) {
pid_t pid;
rc = 0;
goto exit;
}
+ } else {
+ sd_notify(1, "READY=1");
}
- startup_log(udev);
-
- /* redirect std{out,err} */
- if (!debug && !debug_trace) {
- dup2(fd, STDIN_FILENO);
- dup2(fd, STDOUT_FILENO);
- dup2(fd, STDERR_FILENO);
- }
- if (fd > STDERR_FILENO)
- close(fd);
-
- /* set scheduling priority for the daemon */
+ /* set scheduling priority for the main daemon process */
setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
- chdir("/");
- umask(022);
setsid();
- /* OOM_DISABLE == -17 */
- fd = open("/proc/self/oom_adj", O_RDWR);
+ f = fopen("/dev/kmsg", "w");
+ if (f != NULL) {
+ fprintf(f, "<30>udev[%u]: starting version " VERSION "\n", getpid());
+ fclose(f);
+ }
+
+ fd = open("/proc/self/oom_score_adj", O_RDWR);
if (fd < 0) {
- err(udev, "error disabling OOM: %m\n");
+ /* Fallback to old interface */
+ fd = open("/proc/self/oom_adj", O_RDWR);
+ if (fd < 0) {
+ err(udev, "error disabling OOM: %m\n");
+ } else {
+ /* OOM_DISABLE == -17 */
+ write(fd, "-17", 3);
+ close(fd);
+ }
} else {
- write(fd, "-17", 3);
+ write(fd, "-1000", 5);
close(fd);
}
- /* in trace mode run one event after the other */
- if (debug_trace) {
- max_childs = 1;
- } else {
+ if (children_max <= 0) {
int memsize = mem_size_mb();
+ /* set value depending on the amount of RAM */
if (memsize > 0)
- max_childs = 128 + (memsize / 8);
+ children_max = 128 + (memsize / 8);
else
- max_childs = 128;
+ children_max = 128;
}
+ info(udev, "set children_max to %u\n", children_max);
- /* possibly overwrite maximum limit of executed events */
- value = getenv("UDEVD_MAX_CHILDS");
- if (value)
- max_childs = strtoul(value, NULL, 10);
- info(udev, "initialize max_childs to %u\n", max_childs);
+ udev_rules_apply_static_dev_perms(rules);
udev_list_init(&event_list);
udev_list_init(&worker_list);
int timeout;
/* set timeout to kill idle workers */
- if (udev_list_is_empty(&event_list) && childs > 2)
+ if (udev_list_is_empty(&event_list) && children > 2)
timeout = 3 * 1000;
else
timeout = -1;
dev = udev_monitor_receive_device(monitor);
if (dev != NULL)
- event_queue_insert(dev);
- else
- udev_device_unref(dev);
+ if (event_queue_insert(dev) < 0)
+ udev_device_unref(dev);
}
/* start new events */
~ianmdlvl / elogind.git / blobdiff