+static void static_dev_create_from_modules(struct udev *udev)
+{
+ struct utsname kernel;
+ char modules[UTIL_PATH_SIZE];
+ char buf[4096];
+ FILE *f;
+
+ 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;
+ }
+ }
+
+ 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;
+}
+