static int plgfs_test_super(struct super_block *sb, void *data)
{
struct plgfs_mnt_cfg *cfg;
struct plgfs_sb_info *sbi;
int i;
cfg = (struct plgfs_mnt_cfg *)data;
sbi = plgfs_sbi(sb);
if (sbi->pdev) {
if (sbi->pdev->bdev_hidden != cfg->bdev)
return 0;
} else if (!path_equal(&sbi->path_hidden, &cfg->path))
return 0;
cfg->flags |= PLGFS_OPT_DIFF_PLGS;
if (sbi->plgs_nr != cfg->plgs_nr)
return 0;
for (i = 0; i < cfg->plgs_nr; i++) {
if (sbi->plgs[i] != cfg->plgs[i])
return 0;
}
cfg->flags &= ~PLGFS_OPT_DIFF_PLGS;
return 1;
}
int get_user_creds_clean(
const char **username,
uid_t *uid, gid_t *gid,
const char **home,
const char **shell) {
int r;
/* Like get_user_creds(), but resets home/shell to NULL if they don't contain anything relevant. */
r = get_user_creds(username, uid, gid, home, shell);
if (r < 0)
return r;
if (shell &&
(isempty(*shell) || PATH_IN_SET(*shell,
"/bin/nologin",
"/sbin/nologin",
"/usr/bin/nologin",
"/usr/sbin/nologin")))
*shell = NULL;
if (home &&
(isempty(*home) || path_equal(*home, "/")))
*home = NULL;
return 0;
}
int rm_rf(const char *path, RemoveFlags flags) {
int fd, r;
struct statfs s;
assert(path);
/* We refuse to clean the root file system with this
* call. This is extra paranoia to never cause a really
* seriously broken system. */
if (path_equal(path, "/")) {
log_error("Attempted to remove entire root file system, and we can't allow that.");
return -EPERM;
}
if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
/* Try to remove as subvolume first */
r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
if (r >= 0)
return r;
if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR)
return r;
/* Not btrfs or not a subvolume */
}
fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
if (fd < 0) {
if (errno != ENOTDIR && errno != ELOOP)
return -errno;
if (!(flags & REMOVE_PHYSICAL)) {
if (statfs(path, &s) < 0)
return -errno;
if (is_physical_fs(&s)) {
log_error("Attempted to remove disk file system, and we can't allow that.");
return -EPERM;
}
}
if ((flags & REMOVE_ROOT) && !(flags & REMOVE_ONLY_DIRECTORIES))
if (unlink(path) < 0 && errno != ENOENT)
return -errno;
return 0;
}
r = rm_rf_children(fd, flags, NULL);
if (flags & REMOVE_ROOT) {
if (rmdir(path) < 0) {
if (r == 0 && errno != ENOENT)
r = -errno;
}
}
return r;
}
static int automount_verify(Automount *a) {
bool b;
char *e;
assert(a);
if (UNIT(a)->load_state != UNIT_LOADED)
return 0;
if (path_equal(a->where, "/")) {
log_error_unit(UNIT(a)->id, "Cannot have an automount unit for the root directory. Refusing.");
return -EINVAL;
}
e = unit_name_from_path(a->where, ".automount");
if (!e)
return -ENOMEM;
b = unit_has_name(UNIT(a), e);
free(e);
if (!b) {
log_error_unit(UNIT(a)->id, "%s's Where setting doesn't match unit name. Refusing.", UNIT(a)->id);
return -EINVAL;
}
return 0;
}
static int device_update_unit(Manager *m, struct udev_device *dev, const char *path, bool main) {
const char *sysfs, *model;
Unit *u = NULL;
int r;
bool delete;
assert(m);
if (!(sysfs = udev_device_get_syspath(dev)))
return -ENOMEM;
if ((r = device_find_escape_name(m, path, &u)) < 0)
return r;
if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs))
return -EEXIST;
if (!u) {
delete = true;
u = unit_new(m, sizeof(Device));
if (!u)
return -ENOMEM;
r = device_add_escaped_name(u, path);
if (r < 0)
goto fail;
unit_add_to_load_queue(u);
} else
static void drop_duplicates(MountEntry *m, unsigned *n) {
MountEntry *f, *t, *previous;
assert(m);
assert(n);
/* Drops duplicate entries. Expects that the array is properly ordered already. */
for (f = m, t = m, previous = NULL; f < m + *n; f++) {
/* The first one wins (which is the one with the more restrictive mode), see mount_path_compare()
* above. */
if (previous && path_equal(mount_entry_path(f), mount_entry_path(previous))) {
log_debug("%s is duplicate.", mount_entry_path(f));
previous->read_only = previous->read_only || mount_entry_read_only(f); /* Propagate the read-only flag to the remaining entry */
mount_entry_done(f);
continue;
}
*t = *f;
previous = t;
t++;
}
*n = t - m;
}
static int automount_verify(Automount *a) {
_cleanup_free_ char *e = NULL;
int r;
assert(a);
if (UNIT(a)->load_state != UNIT_LOADED)
return 0;
if (path_equal(a->where, "/")) {
log_unit_error(UNIT(a), "Cannot have an automount unit for the root directory. Refusing.");
return -EINVAL;
}
r = unit_name_from_path(a->where, ".automount", &e);
if (r < 0)
return log_unit_error(UNIT(a), "Failed to generate unit name from path: %m");
if (!unit_has_name(UNIT(a), e)) {
log_unit_error(UNIT(a), "Where= setting doesn't match unit name. Refusing.");
return -EINVAL;
}
return 0;
}
STRV_FOREACH_PAIR(link, p, links) {
_cleanup_free_ char *target = NULL;
char *f = strappenda(original_dir, *p);
char *l = strappenda(copy_dir, *link);
assert_se(readlink_and_canonicalize(l, &target) == 0);
assert_se(path_equal(f, target));
}
STRV_FOREACH_PAIR(link, p, links) {
_cleanup_free_ char *target, *f, *l;
assert_se(f = strjoin(original_dir, *p));
assert_se(l = strjoin(copy_dir, *link));
assert_se(chase_symlinks(l, NULL, 0, &target) == 1);
assert_se(path_equal(f, target));
}
bool mount_point_ignore(const char *path) {
const char *i;
NULSTR_FOREACH(i, ignore_paths)
if (path_equal(path, i))
return true;
return false;
}
STRV_FOREACH_PAIR(link, p, links) {
_cleanup_free_ char *target = NULL, *f, *l;
assert_se((f = strjoin(original_dir, *p)));
assert_se((l = strjoin(copy_dir, *link)));
assert_se(readlink_and_canonicalize(l, NULL, &target) == 0);
assert_se(path_equal(f, target));
}
/*
* Whenever we do any sort of path lookup, we must make sure we are in
* the namespace of our southbound fs. This is a simple check that our
* task struct has the right context.
*/
int in_southbound_context(struct task_struct *tsk)
{
int err;
mutex_lock(&ftfs_southbound_lock);
task_lock(tsk);
err = path_equal(&tsk->fs->root, &ftfs_fs->root);
task_unlock(tsk);
mutex_unlock(&ftfs_southbound_lock);
return err;
}
Archive* FileSystem::getArchive (const std::string& archiveName)
{
for (ArchiveEntryList::iterator i = g_archives.begin(); i != g_archives.end(); ++i) {
if (i->is_pakfile) {
if (path_equal(i->name, archiveName)) {
return i->archive;
}
}
}
return 0;
}
int device_path_parse_major_minor(const char *path, mode_t *ret_mode, dev_t *ret_devno) {
mode_t mode;
dev_t devno;
int r;
/* Tries to extract the major/minor directly from the device path if we can. Handles /dev/block/ and /dev/char/
* paths, as well out synthetic inaccessible device nodes. Never goes to disk. Returns -ENODEV if the device
* path cannot be parsed like this. */
if (path_equal(path, "/run/systemd/inaccessible/chr")) {
mode = S_IFCHR;
devno = makedev(0, 0);
} else if (path_equal(path, "/run/systemd/inaccessible/blk")) {
mode = S_IFBLK;
devno = makedev(0, 0);
} else {
const char *w;
w = path_startswith(path, "/dev/block/");
if (w)
mode = S_IFBLK;
else {
w = path_startswith(path, "/dev/char/");
if (!w)
return -ENODEV;
mode = S_IFCHR;
}
r = parse_dev(w, &devno);
if (r < 0)
return r;
}
if (ret_mode)
*ret_mode = mode;
if (ret_devno)
*ret_devno = devno;
return 0;
}
Archive* getArchive(const char* archiveName, bool pakonly)
{
for(archives_t::iterator i = g_archives.begin(); i != g_archives.end(); ++i)
{
if(pakonly && !(*i).is_pakfile)
continue;
if(path_equal((*i).name.c_str(), archiveName))
return (*i).archive;
}
return 0;
}
bool mount_point_is_api(const char *path) {
unsigned i;
/* Checks if this mount point is considered "API", and hence
* should be ignored */
for (i = 0; i < ELEMENTSOF(mount_table); i ++)
if (path_equal(path, mount_table[i].where))
return true;
return path_startswith(path, "/sys/fs/cgroup/");
}
static int equivalent(const char *a, const char *b) {
_cleanup_free_ char *x = NULL, *y = NULL;
x = canonicalize_file_name(a);
if (!x)
return -errno;
y = canonicalize_file_name(b);
if (!y)
return -errno;
return path_equal(x, y);
}
static int equivalent(const char *a, const char *b) {
_cleanup_free_ char *x = NULL, *y = NULL;
int r;
r = chase_symlinks(a, NULL, 0, &x);
if (r < 0)
return r;
r = chase_symlinks(b, NULL, 0, &y);
if (r < 0)
return r;
return path_equal(x, y);
}
static void test_u_n_f_p_one(const char *path, const char *suffix, const char *expected, int ret) {
_cleanup_free_ char *t = NULL;
assert_se(unit_name_from_path(path, suffix, &t) == ret);
puts(strna(t));
assert_se(streq_ptr(t, expected));
if (t) {
_cleanup_free_ char *k = NULL;
assert_se(unit_name_to_path(t, &k) == 0);
puts(strna(k));
assert_se(path_equal(k, isempty(path) ? "/" : path));
}
}
static void test_mnt_id(void) {
_cleanup_fclose_ FILE *f = NULL;
Hashmap *h;
Iterator i;
char *p;
void *k;
int r;
log_info("/* %s */", __func__);
assert_se(f = fopen("/proc/self/mountinfo", "re"));
assert_se(h = hashmap_new(&trivial_hash_ops));
for (;;) {
_cleanup_free_ char *line = NULL, *path = NULL;
int mnt_id;
r = read_line(f, LONG_LINE_MAX, &line);
if (r == 0)
break;
assert_se(r > 0);
assert_se(sscanf(line, "%i %*s %*s %*s %ms", &mnt_id, &path) == 2);
log_debug("mountinfo: %s → %i", path, mnt_id);
assert_se(hashmap_put(h, INT_TO_PTR(mnt_id), path) >= 0);
path = NULL;
}
HASHMAP_FOREACH_KEY(p, k, h, i) {
int mnt_id = PTR_TO_INT(k), mnt_id2;
r = path_get_mnt_id(p, &mnt_id2);
if (r < 0) {
log_debug_errno(r, "Failed to get the mnt id of %s: %m\n", p);
continue;
}
log_debug("mnt ids of %s are %i, %i\n", p, mnt_id, mnt_id2);
if (mnt_id == mnt_id2)
continue;
/* The ids don't match? If so, then there are two mounts on the same path, let's check if
* that's really the case */
char *t = hashmap_get(h, INT_TO_PTR(mnt_id2));
log_debug("the other path for mnt id %i is %s\n", mnt_id2, t);
assert_se(path_equal(p, t));
}
static void test_u_n_f_p_i_one(const char *pattern, const char *path, const char *suffix, const char *expected, int ret) {
_cleanup_free_ char *t = NULL;
assert_se(unit_name_from_path_instance(pattern, path, suffix, &t) == ret);
puts(strna(t));
assert_se(streq_ptr(t, expected));
if (t) {
_cleanup_free_ char *k = NULL, *v = NULL;
assert_se(unit_name_to_instance(t, &k) > 0);
assert_se(unit_name_path_unescape(k, &v) == 0);
assert_se(path_equal(v, isempty(path) ? "/" : path));
}
}
static void test_get_user_creds_one(const char *id, const char *name, uid_t uid, gid_t gid, const char *home, const char *shell) {
const char *rhome = NULL;
const char *rshell = NULL;
uid_t ruid = UID_INVALID;
gid_t rgid = GID_INVALID;
int r;
log_info("/* %s(\"%s\", \"%s\", "UID_FMT", "GID_FMT", \"%s\", \"%s\") */",
__func__, id, name, uid, gid, home, shell);
r = get_user_creds(&id, &ruid, &rgid, &rhome, &rshell, 0);
log_info_errno(r, "got \"%s\", "UID_FMT", "GID_FMT", \"%s\", \"%s\": %m",
id, ruid, rgid, strnull(rhome), strnull(rshell));
if (!synthesize_nobody() && streq(name, NOBODY_USER_NAME)) {
log_info("(skipping detailed tests because nobody is not synthesized)");
return;
}
assert_se(r == 0);
assert_se(streq_ptr(id, name));
assert_se(ruid == uid);
assert_se(rgid == gid);
assert_se(path_equal(rhome, home));
assert_se(path_equal(rshell, shell));
}
HASHMAP_FOREACH(f, top, i) {
char *o;
o = hashmap_get(bottom, path_get_file_name(f));
assert(o);
if (path_equal(o, f)) {
notify_override_unchanged(f);
continue;
}
k = found_override(f, o);
if (k < 0)
r = k;
n_found ++;
}
static int device_setup_unit(Manager *m, struct udev_device *dev, const char *path, bool main) {
_cleanup_free_ char *e = NULL;
const char *sysfs = NULL;
Unit *u = NULL;
bool delete;
int r;
assert(m);
assert(path);
if (dev) {
sysfs = udev_device_get_syspath(dev);
if (!sysfs)
return 0;
}
r = unit_name_from_path(path, ".device", &e);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name from device path: %m");
u = manager_get_unit(m, e);
/* The device unit can still be present even if the device was
* unplugged: a mount unit can reference it hence preventing
* the GC to have garbaged it. That's desired since the device
* unit may have a dependency on the mount unit which was
* added during the loading of the later. */
if (dev && u && DEVICE(u)->state == DEVICE_PLUGGED) {
/* This unit is in plugged state: we're sure it's
* attached to a device. */
if (!path_equal(DEVICE(u)->sysfs, sysfs)) {
log_unit_debug(u, "Dev %s appeared twice with different sysfs paths %s and %s",
e, DEVICE(u)->sysfs, sysfs);
return -EEXIST;
}
}
if (!u) {
delete = true;
r = unit_new_for_name(m, sizeof(Device), e, &u);
if (r < 0)
goto fail;
unit_add_to_load_queue(u);
} else
int mount_systemd_cgroup_writable(
const char *dest,
CGroupUnified unified_requested) {
_cleanup_free_ char *own_cgroup_path = NULL;
const char *root, *own;
int r;
assert(dest);
r = cg_pid_get_path(NULL, 0, &own_cgroup_path);
if (r < 0)
return log_error_errno(r, "Failed to determine our own cgroup path: %m");
/* If we are living in the top-level, then there's nothing to do... */
if (path_equal(own_cgroup_path, "/"))
return 0;
if (unified_requested >= CGROUP_UNIFIED_ALL) {
root = prefix_roota(dest, "/sys/fs/cgroup");
own = strjoina(root, own_cgroup_path);
} else {
if (unified_requested >= CGROUP_UNIFIED_SYSTEMD) {
root = prefix_roota(dest, "/sys/fs/cgroup/unified");
own = strjoina(root, own_cgroup_path);
r = mount_systemd_cgroup_writable_one(root, own);
if (r < 0)
return r;
}
root = prefix_roota(dest, "/sys/fs/cgroup/systemd");
own = strjoina(root, own_cgroup_path);
}
return mount_systemd_cgroup_writable_one(root, own);
}
int main(int argc, char*argv[]) {
char *path;
char *c, *p;
assert_se(cg_create(SYSTEMD_CGROUP_CONTROLLER, "/test-a") == 0);
assert_se(cg_create(SYSTEMD_CGROUP_CONTROLLER, "/test-a") == 0);
assert_se(cg_create(SYSTEMD_CGROUP_CONTROLLER, "/test-b") == 0);
assert_se(cg_create(SYSTEMD_CGROUP_CONTROLLER, "/test-b/test-c") == 0);
assert_se(cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, "/test-b", 0) == 0);
assert_se(cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, getpid(), &path) == 0);
assert_se(streq(path, "/test-b"));
free(path);
assert_se(cg_attach(SYSTEMD_CGROUP_CONTROLLER, "/test-a", 0) == 0);
assert_se(cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, getpid(), &path) == 0);
assert_se(path_equal(path, "/test-a"));
free(path);
assert_se(cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, "/test-b/test-d", 0) == 0);
assert_se(cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, getpid(), &path) == 0);
assert_se(path_equal(path, "/test-b/test-d"));
free(path);
assert_se(cg_get_path(SYSTEMD_CGROUP_CONTROLLER, "/test-b/test-d", NULL, &path) == 0);
assert_se(path_equal(path, "/sys/fs/cgroup/systemd/test-b/test-d"));
free(path);
assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) > 0);
assert_se(cg_is_empty(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) > 0);
assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) > 0);
assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) == 0);
assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", 0, false, false, false, NULL) == 0);
assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", 0, false, false, false, NULL) > 0);
assert_se(cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", SYSTEMD_CGROUP_CONTROLLER, "/test-a", false, false) > 0);
assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", false) == 0);
assert_se(cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", false) > 0);
assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-a", 0, false, false, false, NULL) > 0);
assert_se(cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, "/test-b", 0, false, false, false, NULL) == 0);
cg_trim(SYSTEMD_CGROUP_CONTROLLER, "/", false);
assert_se(cg_delete(SYSTEMD_CGROUP_CONTROLLER, "/test-b") < 0);
assert_se(cg_delete(SYSTEMD_CGROUP_CONTROLLER, "/test-a") >= 0);
assert_se(cg_split_spec("foobar:/", &c, &p) == 0);
assert(streq(c, "foobar"));
assert(streq(p, "/"));
free(c);
free(p);
assert_se(cg_split_spec("foobar:", &c, &p) < 0);
assert_se(cg_split_spec("foobar:asdfd", &c, &p) < 0);
assert_se(cg_split_spec(":///", &c, &p) < 0);
assert_se(cg_split_spec(":", &c, &p) < 0);
assert_se(cg_split_spec("", &c, &p) < 0);
assert_se(cg_split_spec("fo/obar:/", &c, &p) < 0);
assert_se(cg_split_spec("/", &c, &p) >= 0);
assert(c == NULL);
assert(streq(p, "/"));
free(p);
assert_se(cg_split_spec("foo", &c, &p) >= 0);
assert(streq(c, "foo"));
assert(p == NULL);
free(c);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_ROOT,
ARG_LOCALE,
ARG_LOCALE_MESSAGES,
ARG_TIMEZONE,
ARG_HOSTNAME,
ARG_MACHINE_ID,
ARG_ROOT_PASSWORD,
ARG_ROOT_PASSWORD_FILE,
ARG_PROMPT,
ARG_PROMPT_LOCALE,
ARG_PROMPT_TIMEZONE,
ARG_PROMPT_HOSTNAME,
ARG_PROMPT_ROOT_PASSWORD,
ARG_COPY,
ARG_COPY_LOCALE,
ARG_COPY_TIMEZONE,
ARG_COPY_ROOT_PASSWORD,
ARG_SETUP_MACHINE_ID,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "root", required_argument, NULL, ARG_ROOT },
{ "locale", required_argument, NULL, ARG_LOCALE },
{ "locale-messages", required_argument, NULL, ARG_LOCALE_MESSAGES },
{ "timezone", required_argument, NULL, ARG_TIMEZONE },
{ "hostname", required_argument, NULL, ARG_HOSTNAME },
{ "machine-id", required_argument, NULL, ARG_MACHINE_ID },
{ "root-password", required_argument, NULL, ARG_ROOT_PASSWORD },
{ "root-password-file", required_argument, NULL, ARG_ROOT_PASSWORD_FILE },
{ "prompt", no_argument, NULL, ARG_PROMPT },
{ "prompt-locale", no_argument, NULL, ARG_PROMPT_LOCALE },
{ "prompt-timezone", no_argument, NULL, ARG_PROMPT_TIMEZONE },
{ "prompt-hostname", no_argument, NULL, ARG_PROMPT_HOSTNAME },
{ "prompt-root-password", no_argument, NULL, ARG_PROMPT_ROOT_PASSWORD },
{ "copy", no_argument, NULL, ARG_COPY },
{ "copy-locale", no_argument, NULL, ARG_COPY_LOCALE },
{ "copy-timezone", no_argument, NULL, ARG_COPY_TIMEZONE },
{ "copy-root-password", no_argument, NULL, ARG_COPY_ROOT_PASSWORD },
{ "setup-machine-id", no_argument, NULL, ARG_SETUP_MACHINE_ID },
{}
};
int r, c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
return version();
case ARG_ROOT:
free(arg_root);
arg_root = path_make_absolute_cwd(optarg);
if (!arg_root)
return log_oom();
path_kill_slashes(arg_root);
if (path_equal(arg_root, "/"))
arg_root = mfree(arg_root);
break;
case ARG_LOCALE:
if (!locale_is_valid(optarg)) {
log_error("Locale %s is not valid.", optarg);
return -EINVAL;
}
r = free_and_strdup(&arg_locale, optarg);
if (r < 0)
return log_oom();
break;
case ARG_LOCALE_MESSAGES:
if (!locale_is_valid(optarg)) {
log_error("Locale %s is not valid.", optarg);
return -EINVAL;
}
r = free_and_strdup(&arg_locale_messages, optarg);
if (r < 0)
return log_oom();
break;
case ARG_TIMEZONE:
if (!timezone_is_valid(optarg)) {
log_error("Timezone %s is not valid.", optarg);
return -EINVAL;
}
r = free_and_strdup(&arg_timezone, optarg);
if (r < 0)
return log_oom();
break;
case ARG_ROOT_PASSWORD:
r = free_and_strdup(&arg_root_password, optarg);
if (r < 0)
return log_oom();
break;
case ARG_ROOT_PASSWORD_FILE:
arg_root_password = mfree(arg_root_password);
r = read_one_line_file(optarg, &arg_root_password);
if (r < 0)
return log_error_errno(r, "Failed to read %s: %m", optarg);
break;
case ARG_HOSTNAME:
if (!hostname_is_valid(optarg, true)) {
log_error("Host name %s is not valid.", optarg);
return -EINVAL;
}
hostname_cleanup(optarg);
r = free_and_strdup(&arg_hostname, optarg);
if (r < 0)
return log_oom();
break;
case ARG_MACHINE_ID:
if (sd_id128_from_string(optarg, &arg_machine_id) < 0) {
log_error("Failed to parse machine id %s.", optarg);
return -EINVAL;
}
break;
case ARG_PROMPT:
arg_prompt_locale = arg_prompt_timezone = arg_prompt_hostname = arg_prompt_root_password = true;
break;
case ARG_PROMPT_LOCALE:
arg_prompt_locale = true;
break;
case ARG_PROMPT_TIMEZONE:
arg_prompt_timezone = true;
break;
case ARG_PROMPT_HOSTNAME:
arg_prompt_hostname = true;
break;
case ARG_PROMPT_ROOT_PASSWORD:
arg_prompt_root_password = true;
break;
case ARG_COPY:
arg_copy_locale = arg_copy_timezone = arg_copy_root_password = true;
break;
case ARG_COPY_LOCALE:
arg_copy_locale = true;
break;
case ARG_COPY_TIMEZONE:
arg_copy_timezone = true;
break;
case ARG_COPY_ROOT_PASSWORD:
arg_copy_root_password = true;
break;
case ARG_SETUP_MACHINE_ID:
r = sd_id128_randomize(&arg_machine_id);
if (r < 0)
return log_error_errno(r, "Failed to generate randomized machine ID: %m");
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
return 1;
}
int switch_root(const char *new_root, const char *oldroot, bool detach_oldroot, unsigned long mountflags) {
/* Don't try to unmount/move the old "/", there's no way to do it. */
static const char move_mounts[] =
"/dev\0"
"/proc\0"
"/sys\0"
"/run\0";
_cleanup_close_ int old_root_fd = -1;
struct stat new_root_stat;
bool old_root_remove;
const char *i, *temporary_old_root;
if (path_equal(new_root, "/"))
return 0;
temporary_old_root = strappenda(new_root, oldroot);
mkdir_p_label(temporary_old_root, 0755);
old_root_remove = in_initrd();
if (stat(new_root, &new_root_stat) < 0) {
log_error("Failed to stat directory %s: %m", new_root);
return -errno;
}
/* Work-around for kernel design: the kernel refuses switching
* root if any file systems are mounted MS_SHARED. Hence
* remount them MS_PRIVATE here as a work-around.
*
* https://bugzilla.redhat.com/show_bug.cgi?id=847418 */
if (mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) < 0)
log_warning("Failed to make \"/\" private mount: %m");
NULSTR_FOREACH(i, move_mounts) {
char new_mount[PATH_MAX];
struct stat sb;
snprintf(new_mount, sizeof(new_mount), "%s%s", new_root, i);
char_array_0(new_mount);
mkdir_p_label(new_mount, 0755);
if ((stat(new_mount, &sb) < 0) ||
sb.st_dev != new_root_stat.st_dev) {
/* Mount point seems to be mounted already or
* stat failed. Unmount the old mount
* point. */
if (umount2(i, MNT_DETACH) < 0)
log_warning("Failed to unmount %s: %m", i);
continue;
}
if (mount(i, new_mount, NULL, mountflags, NULL) < 0) {
if (mountflags & MS_MOVE) {
log_error("Failed to move mount %s to %s, forcing unmount: %m", i, new_mount);
if (umount2(i, MNT_FORCE) < 0)
log_warning("Failed to unmount %s: %m", i);
}
if (mountflags & MS_BIND)
log_error("Failed to bind mount %s to %s: %m", i, new_mount);
}
}
static int add_mount(
const char *what,
const char *where,
const char *type,
const char *opts,
int passno,
bool noauto,
bool nofail,
bool automount,
bool isbind,
const char *pre,
const char *pre2,
const char *online,
const char *post,
const char *source) {
_cleanup_free_ char
*name = NULL, *unit = NULL, *lnk = NULL, *device = NULL,
*automount_name = NULL, *automount_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(where);
assert(type);
assert(opts);
assert(source);
if (streq(type, "autofs"))
return 0;
if (!is_path(where)) {
log_warning("Mount point %s is not a valid path, ignoring.", where);
return 0;
}
if (mount_point_is_api(where) ||
mount_point_ignore(where))
return 0;
name = unit_name_from_path(where, ".mount");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
if (errno == EEXIST)
log_error("Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
else
log_error("Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"DefaultDependencies=no\n",
source);
if (!path_equal(where, "/")) {
if (pre)
fprintf(f,
"After=%s\n",
pre);
if (pre2)
fprintf(f,
"After=%s\n",
pre2);
if (online)
fprintf(f,
"After=%s\n"
"Wants=%s\n",
online,
online);
fprintf(f,
"Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
"Before=" SPECIAL_UMOUNT_TARGET "\n");
}
if (post && !noauto && !nofail && !automount)
fprintf(f,
"Before=%s\n",
post);
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
"Where=%s\n"
"Type=%s\n"
"FsckPassNo=%i\n",
what,
where,
type,
passno);
if (!isempty(opts) &&
!streq(opts, "defaults"))
fprintf(f,
"Options=%s\n",
opts);
fflush(f);
if (ferror(f)) {
log_error("Failed to write unit file %s: %m", unit);
return -errno;
}
if (!noauto) {
/* don't start network mounts automatically, we do that via ifupdown hooks for now */
if (post && !streq(post, SPECIAL_REMOTE_FS_TARGET)) {
lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return -errno;
}
}
if (!isbind &&
!path_equal(where, "/")) {
r = device_name(what, &device);
if (r < 0)
return r;
if (r > 0) {
free(lnk);
lnk = strjoin(arg_dest, "/", device, ".wants/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return -errno;
}
}
}
}
if (automount && !path_equal(where, "/")) {
automount_name = unit_name_from_path(where, ".automount");
if (!name)
return log_oom();
automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
if (!automount_unit)
return log_oom();
fclose(f);
f = fopen(automount_unit, "wxe");
if (!f) {
log_error("Failed to create unit file %s: %m", automount_unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"DefaultDependencies=no\n"
"Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
"Before=" SPECIAL_UMOUNT_TARGET "\n",
source);
if (post)
fprintf(f,
"Before= %s\n",
post);
fprintf(f,
"[Automount]\n"
"Where=%s\n",
where);
fflush(f);
if (ferror(f)) {
log_error("Failed to write unit file %s: %m", automount_unit);
return -errno;
}
free(lnk);
lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(automount_unit, lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return -errno;
}
}
return 0;
}
int main(int argc, char *argv[]) {
int ret = EXIT_FAILURE;
_cleanup_endmntent_ FILE *f = NULL;
struct mntent* me;
Hashmap *pids = NULL;
if (argc > 1) {
log_error("This program takes no argument.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
f = setmntent("/etc/fstab", "r");
if (!f) {
if (errno == ENOENT)
return EXIT_SUCCESS;
log_error("Failed to open /etc/fstab: %m");
return EXIT_FAILURE;
}
pids = hashmap_new(trivial_hash_func, trivial_compare_func);
if (!pids) {
log_error("Failed to allocate set");
goto finish;
}
ret = EXIT_SUCCESS;
while ((me = getmntent(f))) {
pid_t pid;
int k;
char *s;
/* Remount the root fs, /usr and all API VFS */
if (!mount_point_is_api(me->mnt_dir) &&
!path_equal(me->mnt_dir, "/") &&
!path_equal(me->mnt_dir, "/usr"))
continue;
log_debug("Remounting %s", me->mnt_dir);
pid = fork();
if (pid < 0) {
log_error("Failed to fork: %m");
ret = EXIT_FAILURE;
continue;
}
if (pid == 0) {
const char *arguments[5];
/* Child */
arguments[0] = "/bin/mount";
arguments[1] = me->mnt_dir;
arguments[2] = "-o";
arguments[3] = "remount";
arguments[4] = NULL;
execv("/bin/mount", (char **) arguments);
log_error("Failed to execute /bin/mount: %m");
_exit(EXIT_FAILURE);
}
/* Parent */
s = strdup(me->mnt_dir);
if (!s) {
log_oom();
ret = EXIT_FAILURE;
continue;
}
k = hashmap_put(pids, UINT_TO_PTR(pid), s);
if (k < 0) {
log_error("Failed to add PID to set: %s", strerror(-k));
ret = EXIT_FAILURE;
continue;
}
}
while (!hashmap_isempty(pids)) {
siginfo_t si = {};
char *s;
if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
if (errno == EINTR)
continue;
log_error("waitid() failed: %m");
ret = EXIT_FAILURE;
break;
}
s = hashmap_remove(pids, UINT_TO_PTR(si.si_pid));
if (s) {
if (!is_clean_exit(si.si_code, si.si_status, NULL)) {
if (si.si_code == CLD_EXITED)
log_error("/bin/mount for %s exited with exit status %i.", s, si.si_status);
else
log_error("/bin/mount for %s terminated by signal %s.", s, signal_to_string(si.si_status));
ret = EXIT_FAILURE;
}
free(s);
}
}
finish:
if (pids)
hashmap_free_free(pids);
return ret;
}