/* move any old watches directory out of the way, and then restore
* the watches
*/
void udev_watch_restore(struct udev *udev)
{
char filename[UTIL_PATH_SIZE], oldname[UTIL_PATH_SIZE];
if (inotify_fd < 0)
return;
util_strscpyl(oldname, sizeof(oldname), udev_get_dev_path(udev), "/.udev/watch.old", NULL);
util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/watch", NULL);
if (rename(filename, oldname) == 0) {
DIR *dir;
struct dirent *ent;
dir = opendir(oldname);
if (dir == NULL) {
err(udev, "unable to open old watches dir '%s', old watches will not be restored: %m", oldname);
return;
}
for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) {
char device[UTIL_PATH_SIZE];
char *s;
size_t l;
ssize_t len;
struct udev_device *dev;
int maj, min;
char type;
if (ent->d_name[0] == '.')
continue;
s = device;
l = util_strpcpy(&s, sizeof(device), udev_get_sys_path(udev));
len = readlinkat(dirfd(dir), ent->d_name, s, l);
if (len <= 0 || len == (ssize_t)l)
goto unlink;
s[len] = '\0';
if (sscanf(s, "%c%i:%i", &type, &maj, &min) != 3)
goto unlink;
dev = udev_device_new_from_devnum(udev, type, makedev(maj, min));
if (dev == NULL)
goto unlink;
info(udev, "restoring old watch on '%s'\n", udev_device_get_devnode(dev));
udev_watch_begin(udev, dev);
udev_device_unref(dev);
unlink:
unlinkat(dirfd(dir), ent->d_name, 0);
}
closedir(dir);
rmdir(oldname);
} else if (errno != ENOENT) {
err(udev, "unable to move watches dir '%s', old watches will not be restored: %m", filename);
}
}
/* manage "stack of names" with possibly specified device priorities */
static void link_update(struct udev_device *dev, const char *slink, bool add)
{
struct udev *udev = udev_device_get_udev(dev);
char name_enc[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
char dirname[UTIL_PATH_SIZE];
const char *target;
char buf[UTIL_PATH_SIZE];
dbg(udev, "update symlink '%s' of '%s'\n", slink, udev_device_get_syspath(dev));
util_path_encode(&slink[strlen(udev_get_dev_path(udev))+1], name_enc, sizeof(name_enc));
util_strscpyl(dirname, sizeof(dirname), udev_get_run_path(udev), "/links/", name_enc, NULL);
util_strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
if (!add) {
dbg(udev, "removing index: '%s'\n", filename);
if (unlink(filename) == 0)
rmdir(dirname);
}
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
info(udev, "no reference left, remove '%s'\n", slink);
if (unlink(slink) == 0)
util_delete_path(udev, slink);
} else {
info(udev, "creating link '%s' to '%s'\n", slink, target);
node_symlink(udev, target, slink);
}
if (add) {
int err;
dbg(udev, "creating index: '%s'\n", filename);
do {
int fd;
err = util_create_path(udev, filename);
if (err != 0 && err != -ENOENT)
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd >= 0)
close(fd);
else
err = -errno;
} while (err == -ENOENT);
}
}
/* manage "stack of names" with possibly specified device priorities */
static void link_update(struct udev_device *dev, const char *slink, bool add)
{
struct udev *udev = udev_device_get_udev(dev);
char name_enc[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
char dirname[UTIL_PATH_SIZE];
const char *target;
char buf[UTIL_PATH_SIZE];
util_path_encode(slink + strlen("/dev"), name_enc, sizeof(name_enc));
util_strscpyl(dirname, sizeof(dirname), "/run/udev/links/", name_enc, NULL);
util_strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
if (!add && unlink(filename) == 0)
rmdir(dirname);
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
log_debug("no reference left, remove '%s'\n", slink);
if (unlink(slink) == 0)
util_delete_path(udev, slink);
} else {
log_debug("creating link '%s' to '%s'\n", slink, target);
node_symlink(udev, target, slink);
}
if (add) {
int err;
do {
int fd;
err = mkdir_parents(filename, 0755);
if (err != 0 && err != -ENOENT)
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd >= 0)
close(fd);
else
err = -errno;
} while (err == -ENOENT);
}
}
static void print_property(struct udev_device *dev, bool test, const char *name, const char *value)
{
char s[265];
s[0] = '\0';
if (streq(name, "TYPE")) {
udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
} else if (streq(name, "USAGE")) {
udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
} else if (streq(name, "VERSION")) {
udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
} else if (streq(name, "UUID")) {
blkid_safe_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
blkid_encode_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
} else if (streq(name, "UUID_SUB")) {
blkid_safe_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
blkid_encode_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
} else if (streq(name, "LABEL")) {
blkid_safe_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
blkid_encode_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
} else if (streq(name, "PTTYPE")) {
udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
} else if (streq(name, "PART_ENTRY_NAME")) {
blkid_encode_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
} else if (streq(name, "PART_ENTRY_TYPE")) {
blkid_encode_string(value, s, sizeof(s));
udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
} else if (startswith(name, "PART_ENTRY_")) {
util_strscpyl(s, sizeof(s), "ID_", name, NULL);
udev_builtin_add_property(dev, test, s, value);
}
}
static void exec_list(struct udev_enumerate *udev_enumerate, const char *action)
{
struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
struct udev_list_entry *entry;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
char filename[UTIL_PATH_SIZE];
int fd;
if (verbose)
printf("%s\n", udev_list_entry_get_name(entry));
if (dry_run)
continue;
util_strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
fd = open(filename, O_WRONLY);
if (fd < 0) {
dbg(udev, "error on opening %s: %m\n", filename);
continue;
}
if (write(fd, action, strlen(action)) < 0)
info(udev, "error writing '%s' to '%s': %m\n", action, filename);
close(fd);
}
void udev_selinux_setfscreateconat(struct udev *udev, int dfd, const char *file, unsigned int mode)
{
char filename[UTIL_PATH_SIZE];
if (!selinux_enabled)
return;
/* resolve relative filename */
if (file[0] != '/') {
char procfd[UTIL_PATH_SIZE];
char target[UTIL_PATH_SIZE];
ssize_t len;
snprintf(procfd, sizeof(procfd), "/proc/%u/fd/%u", getpid(), dfd);
len = readlink(procfd, target, sizeof(target));
if (len <= 0 || len == sizeof(target))
return;
target[len] = '\0';
util_strscpyl(filename, sizeof(filename), target, "/", file, NULL);
file = filename;
}
udev_selinux_setfscreatecon(udev, file, mode);
}
int main(int argc, char *argv[])
{
struct udev *udev;
struct udev_event *event = NULL;
struct udev_device *dev = NULL;
struct udev_rules *rules = NULL;
char syspath[UTIL_PATH_SIZE];
const char *devpath;
const char *action;
sigset_t mask, sigmask_orig;
int err = -EINVAL;
udev = udev_new();
if (udev == NULL)
exit(1);
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
action = argv[1];
if (action == NULL) {
err(udev, "action missing\n");
goto out;
}
devpath = argv[2];
if (devpath == NULL) {
err(udev, "devpath missing\n");
goto out;
}
rules = udev_rules_new(udev, 1);
util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
dev = udev_device_new_from_syspath(udev, syspath);
if (dev == NULL) {
info(udev, "unknown device '%s'\n", devpath);
goto out;
}
udev_device_set_action(dev, action);
event = udev_event_new(dev);
sigfillset(&mask);
sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
if (event->fd_signal < 0) {
fprintf(stderr, "error creating signalfd\n");
goto out;
}
/* do what devtmpfs usually provides us */
if (udev_device_get_devnode(dev) != NULL) {
mode_t mode;
if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (strcmp(action, "remove") != 0) {
util_create_path(udev, udev_device_get_devnode(dev));
mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
} else {
unlink(udev_device_get_devnode(dev));
util_delete_path(udev, udev_device_get_devnode(dev));
}
}
err = udev_event_execute_rules(event, rules, &sigmask_orig);
if (err == 0)
udev_event_execute_run(event, NULL);
out:
if (event != NULL && event->fd_signal >= 0)
close(event->fd_signal);
udev_event_unref(event);
udev_device_unref(dev);
udev_rules_unref(rules);
udev_selinux_exit(udev);
udev_unref(udev);
if (err != 0)
return 1;
return 0;
}
static int node_symlink(struct udev *udev, const char *node, const char *slink)
{
struct stat stats;
char target[UTIL_PATH_SIZE];
char *s;
size_t l;
char slink_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
int i = 0;
int tail = 0;
int err = 0;
/* use relative link */
target[0] = '\0';
while (node[i] && (node[i] == slink[i])) {
if (node[i] == '/')
tail = i+1;
i++;
}
s = target;
l = sizeof(target);
while (slink[i] != '\0') {
if (slink[i] == '/')
l = util_strpcpy(&s, l, "../");
i++;
}
l = util_strscpy(s, l, &node[tail]);
if (l == 0) {
err = -EINVAL;
goto exit;
}
/* preserve link with correct target, do not replace node of other device */
if (lstat(slink, &stats) == 0) {
if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) {
struct stat stats2;
info(udev, "found existing node instead of symlink '%s'\n", slink);
if (lstat(node, &stats2) == 0) {
if ((stats.st_mode & S_IFMT) == (stats2.st_mode & S_IFMT) &&
stats.st_rdev == stats2.st_rdev && stats.st_ino != stats2.st_ino) {
info(udev, "replace device node '%s' with symlink to our node '%s'\n",
slink, node);
} else {
err(udev, "device node '%s' already exists, "
"link to '%s' will not overwrite it\n",
slink, node);
goto exit;
}
}
} else if (S_ISLNK(stats.st_mode)) {
char buf[UTIL_PATH_SIZE];
int len;
dbg(udev, "found existing symlink '%s'\n", slink);
len = readlink(slink, buf, sizeof(buf));
if (len > 0 && len < (int)sizeof(buf)) {
buf[len] = '\0';
if (strcmp(target, buf) == 0) {
info(udev, "preserve already existing symlink '%s' to '%s'\n",
slink, target);
udev_selinux_lsetfilecon(udev, slink, S_IFLNK);
utimensat(AT_FDCWD, slink, NULL, AT_SYMLINK_NOFOLLOW);
goto exit;
}
}
}
} else {
info(udev, "creating symlink '%s' to '%s'\n", slink, target);
do {
err = util_create_path_selinux(udev, slink);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, slink, S_IFLNK);
err = symlink(target, slink);
if (err != 0)
err = -errno;
udev_selinux_resetfscreatecon(udev);
} while (err == -ENOENT);
if (err == 0)
goto exit;
}
info(udev, "atomically replace '%s'\n", slink);
util_strscpyl(slink_tmp, sizeof(slink_tmp), slink, TMP_FILE_EXT, NULL);
unlink(slink_tmp);
do {
err = util_create_path_selinux(udev, slink_tmp);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, slink_tmp, S_IFLNK);
err = symlink(target, slink_tmp);
if (err != 0)
err = -errno;
udev_selinux_resetfscreatecon(udev);
} while (err == -ENOENT);
if (err != 0) {
err(udev, "symlink '%s' '%s' failed: %m\n", target, slink_tmp);
goto exit;
}
err = rename(slink_tmp, slink);
if (err != 0) {
err(udev, "rename '%s' '%s' failed: %m\n", slink_tmp, slink);
unlink(slink_tmp);
}
exit:
return err;
}
static int adm_builtin(struct udev *udev, int argc, char *argv[])
{
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{}
};
char *command = NULL;
char *syspath = NULL;
char filename[UTIL_PATH_SIZE];
struct udev_device *dev = NULL;
enum udev_builtin_cmd cmd;
int rc = EXIT_SUCCESS;
dbg(udev, "version %s\n", VERSION);
for (;;) {
int option;
option = getopt_long(argc, argv, "h", options, NULL);
if (option == -1)
break;
switch (option) {
case 'h':
help(udev);
goto out;
}
}
command = argv[optind++];
if (command == NULL) {
fprintf(stderr, "command missing\n");
help(udev);
rc = 2;
goto out;
}
syspath = argv[optind++];
if (syspath == NULL) {
fprintf(stderr, "syspath missing\n\n");
rc = 3;
goto out;
}
/* add /sys if needed */
if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0)
util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), syspath, NULL);
else
util_strscpy(filename, sizeof(filename), syspath);
util_remove_trailing_chars(filename, '/');
dev = udev_device_new_from_syspath(udev, filename);
if (dev == NULL) {
fprintf(stderr, "unable to open device '%s'\n\n", filename);
rc = 4;
goto out;
}
cmd = udev_builtin_lookup(command);
if (cmd >= UDEV_BUILTIN_MAX) {
fprintf(stderr, "unknown command '%s'\n", command);
help(udev);
rc = 5;
goto out;
}
if (udev_builtin_run(dev, cmd, true) < 0) {
fprintf(stderr, "error executing '%s'\n\n", command);
rc = 6;
}
out:
udev_device_unref(dev);
return rc;
}
int main(int argc, char **argv)
{
static const struct option options[] = {
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{}
};
struct udev *udev;
struct udev_device *dev;
struct udev_device *parent;
char syspath[UTIL_PATH_SIZE];
const char *devpath;
char *path;
char *path_suffix;
int rc = 1;
udev = udev_new();
if (udev == NULL)
goto exit;
udev_log_init("path_id");
udev_set_log_fn(udev, log_fn);
while (1) {
int option;
option = getopt_long(argc, argv, "dh", options, NULL);
if (option == -1)
break;
switch (option) {
case 'd':
debug = 1;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
break;
case 'h':
printf("Usage: path_id [--debug] [--help] <devpath>\n"
" --debug print debug information\n"
" --help print this help text\n\n");
default:
rc = 1;
goto exit;
}
}
devpath = argv[optind];
if (devpath == NULL) {
fprintf(stderr, "No device specified\n");
rc = 2;
goto exit;
}
util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
dev = udev_device_new_from_syspath(udev, syspath);
if (dev == NULL) {
fprintf(stderr, "unable to access '%s'\n", devpath);
rc = 3;
goto exit;
}
path = NULL;
path_suffix = NULL;
/* S390 ccw bus */
parent = udev_device_get_parent_with_subsystem_devtype(dev, "ccw", NULL);
if (parent != NULL) {
handle_ccw(parent, dev, &path);
goto out;
}
/* walk up the chain of devices and compose path */
parent = dev;
while (parent != NULL) {
const char *subsys;
subsys = udev_device_get_subsystem(parent);
if (subsys == NULL) {
;
} else if (strcmp(subsys, "scsi_tape") == 0) {
handle_scsi_tape(parent, &path_suffix);
} else if (strcmp(subsys, "scsi") == 0) {
parent = handle_scsi(parent, &path);
} else if (strcmp(subsys, "cciss") == 0) {
handle_cciss(parent, &path);
} else if (strcmp(subsys, "usb") == 0) {
parent = handle_usb(parent, &path);
} else if (strcmp(subsys, "serio") == 0) {
path_prepend(&path, "serio-%s", udev_device_get_sysnum(parent));
parent = skip_subsystem(parent, "serio");
} else if (strcmp(subsys, "pci") == 0) {
path_prepend(&path, "pci-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "pci");
} else if (strcmp(subsys, "platform") == 0) {
path_prepend(&path, "platform-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "platform");
} else if (strcmp(subsys, "xen") == 0) {
path_prepend(&path, "xen-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "xen");
} else if (strcmp(subsys, "virtio") == 0) {
path_prepend(&path, "virtio-pci-%s", udev_device_get_sysname(parent));
parent = skip_subsystem(parent, "virtio");
}
parent = udev_device_get_parent(parent);
}
out:
if (path != NULL) {
if (path_suffix != NULL) {
printf("ID_PATH=%s%s\n", path, path_suffix);
free(path_suffix);
} else {
printf("ID_PATH=%s\n", path);
}
free(path);
rc = 0;
}
udev_device_unref(dev);
exit:
udev_unref(udev);
udev_log_close();
return rc;
}
static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test)
{
struct udev *udev = udev_device_get_udev(dev);
static const char *searchpath[] = { FIRMWARE_PATH };
char fwencpath[UTIL_PATH_SIZE];
char misspath[UTIL_PATH_SIZE];
char loadpath[UTIL_PATH_SIZE];
char datapath[UTIL_PATH_SIZE];
char fwpath[UTIL_PATH_SIZE];
const char *firmware;
FILE *fwfile = NULL;
struct utsname kernel;
struct stat statbuf;
unsigned int i;
int rc = EXIT_SUCCESS;
firmware = udev_device_get_property_value(dev, "FIRMWARE");
if (firmware == NULL) {
log_error("firmware parameter missing\n\n");
rc = EXIT_FAILURE;
goto exit;
}
/* lookup firmware file */
uname(&kernel);
for (i = 0; i < ELEMENTSOF(searchpath); i++) {
util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
}
util_path_encode(firmware, fwencpath, sizeof(fwencpath));
util_strscpyl(misspath, sizeof(misspath), "/run/udev/firmware-missing/", fwencpath, NULL);
util_strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL);
if (fwfile == NULL) {
int err;
/* This link indicates the missing firmware file and the associated device */
log_debug("did not find firmware file '%s'\n", firmware);
do {
err = mkdir_parents(misspath, 0755);
if (err != 0 && err != -ENOENT)
break;
err = symlink(udev_device_get_devpath(dev), misspath);
if (err != 0)
err = -errno;
} while (err == -ENOENT);
rc = EXIT_FAILURE;
/*
* Do not cancel the request in the initrd, the real root might have
* the firmware file and the 'coldplug' run in the real root will find
* this pending request and fulfill or cancel it.
* */
if (!in_initrd())
set_loading(udev, loadpath, "-1");
goto exit;
}
if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) {
if (!in_initrd())
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
}
if (unlink(misspath) == 0)
util_delete_path(udev, misspath);
if (!set_loading(udev, loadpath, "1"))
goto exit;
util_strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL);
if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) {
log_error("error sending firmware '%s' to device\n", firmware);
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
};
set_loading(udev, loadpath, "0");
exit:
if (fwfile)
fclose(fwfile);
return rc;
}
int main(int argc, char *argv[])
{
static const struct option options[] = {
{ "export", no_argument, NULL, 'e' },
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{}
};
struct udev *udev;
struct stat buf;
const char *devpath = NULL;
char filename[UTIL_PATH_SIZE], devspec[256], devtype[256];
int export = 0;
int rc = 1;
int i, fd, len;
udev = udev_new();
if (udev == NULL)
goto exit;
udev_log_init("vio_type");
udev_set_log_fn(udev, log_fn);
while (1) {
int option;
option = getopt_long(argc, argv, "edh", options, NULL);
if (option == -1)
break;
switch (option) {
case 'e':
export = 1;
break;
case 'd':
debug = 1;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
break;
case 'h':
printf("Usage: vio_type [--debug] [--help] <devpath>\n"
" --debug print debug information\n"
" --help print this help text\n\n");
default:
goto exit;
}
}
devpath = argv[optind];
if (devpath == NULL) {
err(udev, "No device specified");
rc = 2;
goto exit;
}
util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev),
devpath, "/devspec", NULL);
fd = open(filename, O_RDONLY);
if (fd < 0) {
err(udev, "unable to open '%s'", filename);
goto exit;
}
len = read(fd, devspec, sizeof(devspec));
if (len <= 0) {
#if !defined(__sparc__) && !defined(__sparc64__)
err(udev, "unable to read from '%s'", filename);
#endif
goto close;
}
devspec[len] = '\0';
if (devspec[len-1] == '\n')
devspec[len-1] = '\0';
close(fd);
#if !defined(__sparc__) && !defined(__sparc64__)
/* now we look in /proc */
util_strscpyl(filename, sizeof(filename), "/proc/device-tree",
devspec, "/device_type", NULL);
/* hang around for /proc to catch up */
for (i = 100; i; i--) {
if (stat(filename, &buf) == 0)
break;
usleep(30000);
}
fd = open(filename, O_RDONLY);
if (fd < 0) {
err(udev, "unable to open '%s'", filename);
goto exit;
}
len = read(fd, devtype, sizeof(devtype));
if (len <= 0) {
err(udev, "unable to read from '%s'", filename);
goto close;
}
devtype[len] = '\0';
if (devtype[len-1] == '\n')
devtype[len-1] = '\0';
#else
strncpy(devtype,devspec,strlen(devspec)+1);
#endif
if (export) {
printf("VIO_TYPE=%s\n", devtype);
} else {
int udev_node_mknod(struct udev_device *dev, const char *file, mode_t mode, uid_t uid, gid_t gid)
{
struct udev *udev = udev_device_get_udev(dev);
dev_t devnum = udev_device_get_devnum(dev);
struct stat stats;
int err = 0;
if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (file == NULL)
file = udev_device_get_devnode(dev);
if (lstat(file, &stats) == 0) {
if (((stats.st_mode & S_IFMT) == (mode & S_IFMT)) && (stats.st_rdev == devnum)) {
info(udev, "preserve file '%s', because it has correct dev_t\n", file);
if (stats.st_mode != mode || stats.st_uid != uid || stats.st_gid != gid) {
info(udev, "set permissions %s, %#o, uid=%u, gid=%u\n", file, mode, uid, gid);
chmod(file, mode);
chown(file, uid, gid);
} else {
info(udev, "preserve permissions %s, %#o, uid=%u, gid=%u\n", file, mode, uid, gid);
}
/*
* Set initial selinux file context only on add events.
* We set the proper context on bootup (triger) or for newly
* added devices, but we don't change it later, in case
* something else has set a custom context in the meantime.
*/
if (strcmp(udev_device_get_action(dev), "add") == 0)
udev_selinux_lsetfilecon(udev, file, mode);
/* always update timestamp when we re-use the node, like on media change events */
utimensat(AT_FDCWD, file, NULL, 0);
} else {
char file_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
info(udev, "atomically replace existing file '%s'\n", file);
util_strscpyl(file_tmp, sizeof(file_tmp), file, TMP_FILE_EXT, NULL);
unlink(file_tmp);
udev_selinux_setfscreatecon(udev, file_tmp, mode);
err = mknod(file_tmp, mode, devnum);
udev_selinux_resetfscreatecon(udev);
if (err != 0) {
err(udev, "mknod '%s' %u:%u %#o failed: %m\n",
file_tmp, major(devnum), minor(devnum), mode);
goto exit;
}
err = rename(file_tmp, file);
if (err != 0) {
err(udev, "rename '%s' '%s' failed: %m\n", file_tmp, file);
unlink(file_tmp);
goto exit;
}
info(udev, "set permissions '%s' %#o uid=%u gid=%u\n", file, mode, uid, gid);
chmod(file, mode);
chown(file, uid, gid);
}
} else {
info(udev, "mknod '%s' %u:%u %#o\n", file, major(devnum), minor(devnum), mode);
do {
err = util_create_path(udev, file);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, file, mode);
err = mknod(file, mode, devnum);
if (err != 0)
err = -errno;
udev_selinux_resetfscreatecon(udev);
} while (err == -ENOENT);
if (err != 0)
err(udev, "mknod '%s' %u:%u %#o' failed: %m\n", file, major(devnum), minor(devnum), mode);
info(udev, "set permissions '%s' %#o uid=%u gid=%u\n", file, mode, uid, gid);
chmod(file, mode);
chown(file, uid, gid);
}
exit:
return err;
}
static int node_symlink(struct udev *udev, const char *node, const char *slink)
{
struct stat stats;
char target[UTIL_PATH_SIZE];
char *s;
size_t l;
char slink_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
int i = 0;
int tail = 0;
int err = 0;
/* use relative link */
target[0] = '\0';
while (node[i] && (node[i] == slink[i])) {
if (node[i] == '/')
tail = i+1;
i++;
}
s = target;
l = sizeof(target);
while (slink[i] != '\0') {
if (slink[i] == '/')
l = util_strpcpy(&s, l, "../");
i++;
}
l = util_strscpy(s, l, &node[tail]);
if (l == 0) {
err = -EINVAL;
goto exit;
}
/* preserve link with correct target, do not replace node of other device */
if (lstat(slink, &stats) == 0) {
if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) {
log_error("conflicting device node '%s' found, link to '%s' will not be created\n", slink, node);
goto exit;
} else if (S_ISLNK(stats.st_mode)) {
char buf[UTIL_PATH_SIZE];
int len;
len = readlink(slink, buf, sizeof(buf));
if (len > 0 && len < (int)sizeof(buf)) {
buf[len] = '\0';
if (strcmp(target, buf) == 0) {
log_debug("preserve already existing symlink '%s' to '%s'\n", slink, target);
label_fix(slink, true, false);
utimensat(AT_FDCWD, slink, NULL, AT_SYMLINK_NOFOLLOW);
goto exit;
}
}
}
} else {
log_debug("creating symlink '%s' to '%s'\n", slink, target);
do {
err = mkdir_parents_label(slink, 0755);
if (err != 0 && err != -ENOENT)
break;
label_context_set(slink, S_IFLNK);
err = symlink(target, slink);
if (err != 0)
err = -errno;
label_context_clear();
} while (err == -ENOENT);
if (err == 0)
goto exit;
}
log_debug("atomically replace '%s'\n", slink);
util_strscpyl(slink_tmp, sizeof(slink_tmp), slink, TMP_FILE_EXT, NULL);
unlink(slink_tmp);
do {
err = mkdir_parents_label(slink_tmp, 0755);
if (err != 0 && err != -ENOENT)
break;
label_context_set(slink_tmp, S_IFLNK);
err = symlink(target, slink_tmp);
if (err != 0)
err = -errno;
label_context_clear();
} while (err == -ENOENT);
if (err != 0) {
log_error("symlink '%s' '%s' failed: %m\n", target, slink_tmp);
goto exit;
}
err = rename(slink_tmp, slink);
if (err != 0) {
log_error("rename '%s' '%s' failed: %m\n", slink_tmp, slink);
unlink(slink_tmp);
}
exit:
return err;
}
int udev_node_mknod(struct udev_device *dev, const char *file, dev_t devnum, mode_t mode, uid_t uid, gid_t gid)
{
struct udev *udev = udev_device_get_udev(dev);
struct stat stats;
int preserve = 0;
int err = 0;
if (major(devnum) == 0)
devnum = udev_device_get_devnum(dev);
if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (file == NULL)
file = udev_device_get_devnode(dev);
if (lstat(file, &stats) == 0) {
if (((stats.st_mode & S_IFMT) == (mode & S_IFMT)) && (stats.st_rdev == devnum)) {
info(udev, "preserve file '%s', because it has correct dev_t\n", file);
preserve = 1;
udev_selinux_lsetfilecon(udev, file, mode);
/* update time stamp when we re-use the node, like on media change events */
utimes(file, NULL);
} else {
char file_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
info(udev, "atomically replace existing file '%s'\n", file);
util_strscpyl(file_tmp, sizeof(file_tmp), file, TMP_FILE_EXT, NULL);
unlink(file_tmp);
udev_selinux_setfscreatecon(udev, file_tmp, mode);
err = mknod(file_tmp, mode, devnum);
udev_selinux_resetfscreatecon(udev);
if (err != 0) {
err(udev, "mknod(%s, %#o, %u, %u) failed: %m\n",
file_tmp, mode, major(devnum), minor(devnum));
goto exit;
}
err = rename(file_tmp, file);
if (err != 0) {
err(udev, "rename(%s, %s) failed: %m\n", file_tmp, file);
unlink(file_tmp);
}
}
} else {
info(udev, "mknod(%s, %#o, (%u,%u))\n", file, mode, major(devnum), minor(devnum));
do {
err = util_create_path(udev, file);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, file, mode);
err = mknod(file, mode, devnum);
if (err != 0)
err = -errno;
udev_selinux_resetfscreatecon(udev);
} while (err == -ENOENT);
if (err != 0) {
err(udev, "mknod(%s, %#o, (%u,%u) failed: %m\n", file, mode, major(devnum), minor(devnum));
goto exit;
}
}
if (!preserve || stats.st_mode != mode) {
info(udev, "chmod(%s, %#o)\n", file, mode);
err = chmod(file, mode);
if (err != 0) {
err(udev, "chmod(%s, %#o) failed: %m\n", file, mode);
goto exit;
}
}
if (!preserve || stats.st_uid != uid || stats.st_gid != gid) {
info(udev, "chown(%s, %u, %u)\n", file, uid, gid);
err = chown(file, uid, gid);
if (err != 0) {
err(udev, "chown(%s, %u, %u) failed: %m\n", file, uid, gid);
goto exit;
}
}
exit:
return err;
}
/* find device node of device with highest priority */
static const char *link_find_prioritized(struct udev_device *dev, bool add, const char *stackdir, char *buf, size_t bufsize)
{
struct udev *udev = udev_device_get_udev(dev);
DIR *dir;
int priority = 0;
const char *target = NULL;
if (add) {
priority = udev_device_get_devlink_priority(dev);
util_strscpy(buf, bufsize, udev_device_get_devnode(dev));
target = buf;
}
dir = opendir(stackdir);
if (dir == NULL)
return target;
for (;;) {
struct udev_device *dev_db;
struct dirent *dent;
char devpath[UTIL_PATH_SIZE];
char syspath[UTIL_PATH_SIZE];
ssize_t len;
dent = readdir(dir);
if (dent == NULL || dent->d_name[0] == '\0')
break;
if (dent->d_name[0] == '.')
continue;
dbg(udev, "found '%s/%s'\n", stackdir, dent->d_name);
len = readlinkat(dirfd(dir), dent->d_name, devpath, sizeof(devpath));
if (len <= 0 || len == (ssize_t)sizeof(devpath))
continue;
devpath[len] = '\0';
util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
info(udev, "found '%s' claiming '%s'\n", syspath, stackdir);
/* did we find ourself? */
if (strcmp(udev_device_get_syspath(dev), syspath) == 0)
continue;
dev_db = udev_device_new_from_syspath(udev, syspath);
if (dev_db != NULL) {
const char *devnode;
devnode = udev_device_get_devnode(dev_db);
if (devnode != NULL) {
dbg(udev, "compare priority of '%s'(%i) > '%s'(%i)\n", target, priority,
udev_device_get_devnode(dev_db), udev_device_get_devlink_priority(dev_db));
if (target == NULL || udev_device_get_devlink_priority(dev_db) > priority) {
info(udev, "'%s' claims priority %i for '%s'\n",
syspath, udev_device_get_devlink_priority(dev_db), stackdir);
priority = udev_device_get_devlink_priority(dev_db);
util_strscpy(buf, bufsize, devnode);
target = buf;
}
}
udev_device_unref(dev_db);
}
}
closedir(dir);
return target;
}
