/* 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);
}
}
/* move any old watches directory out of the way, and then restore
* the watches
*/
void udev_watch_restore(struct udev *udev)
{
if (inotify_fd < 0)
return;
if (rename("/run/udev/watch", "/run/udev/watch.old") == 0) {
DIR *dir;
struct dirent *ent;
dir = opendir("/run/udev/watch.old");
if (dir == NULL) {
log_error("unable to open old watches dir /run/udev/watch.old; old watches will not be restored: %m");
return;
}
for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) {
char device[UTIL_PATH_SIZE];
ssize_t len;
struct udev_device *dev;
if (ent->d_name[0] == '.')
continue;
len = readlinkat(dirfd(dir), ent->d_name, device, sizeof(device));
if (len <= 0 || len == (ssize_t)sizeof(device))
goto unlink;
device[len] = '\0';
dev = udev_device_new_from_device_id(udev, device);
if (dev == NULL)
goto unlink;
log_debug("restoring old watch on '%s'", 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("/run/udev/watch.old");
} else if (errno != ENOENT) {
log_error("unable to move watches dir /run/udev/watch; old watches will not be restored: %m");
}
}
/* 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_strlcpy(oldname, udev_get_dev_path(udev), sizeof(oldname));
util_strlcat(oldname, "/.udev/watch.old", sizeof(oldname));
util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
util_strlcat(filename, "/.udev/watch", sizeof(filename));
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;
}
while ((ent = readdir(dir)) != NULL) {
char path[UTIL_PATH_SIZE];
char buf[UTIL_PATH_SIZE];
ssize_t syslen;
ssize_t len;
struct udev_device *dev;
if (ent->d_name[0] < '0' || ent->d_name[0] > '9')
continue;
util_strlcpy(path, oldname, sizeof(path));
util_strlcat(path, "/", sizeof(path));
util_strlcat(path, ent->d_name, sizeof(path));
syslen = util_strlcpy(buf, udev_get_sys_path(udev), sizeof(buf));
len = readlink(path, &buf[syslen], sizeof(buf)-syslen);
if (len <= 0 || len >= (ssize_t)(sizeof(buf)-syslen)) {
unlink(path);
continue;
}
buf[syslen + len] = '\0';
dbg(udev, "old watch to '%s' found\n", buf);
dev = udev_device_new_from_syspath(udev, buf);
if (dev == NULL) {
unlink(path);
continue;
}
info(udev, "restoring old watch on '%s'\n", udev_device_get_devnode(dev));
udev_watch_begin(udev, dev);
udev_device_unref(dev);
unlink(path);
}
closedir(dir);
rmdir(oldname);
} else if (errno != ENOENT) {
err(udev, "unable to move watches dir '%s', old watches will not be restored: %m", filename);
}
}
