static int link_compatibility(const char *units) {
const char *f, *t;
f = strappenda(units, "/systemd-bus-proxyd.socket");
t = strappenda(arg_dest, "/" SPECIAL_DBUS_SOCKET);
mkdir_parents_label(t, 0755);
if (symlink(f, t) < 0) {
log_error("Failed to create symlink %s: %m", t);
return -errno;
}
f = strappenda(units, "/systemd-bus-proxyd.socket");
t = strappenda(arg_dest, "/" SPECIAL_SOCKETS_TARGET ".wants/systemd-bus-proxyd.socket");
mkdir_parents_label(t, 0755);
if (symlink(f, t) < 0) {
log_error("Failed to create symlink %s: %m", t);
return -errno;
}
t = strappenda(arg_dest, "/" SPECIAL_DBUS_SERVICE);
if (symlink("/dev/null", t) < 0) {
log_error("Failed to mask %s: %m", t);
return -errno;
}
return 0;
}
static int tar_import_fork_tar(TarImport *i) {
int r;
assert(i);
assert(!i->final_path);
assert(!i->temp_path);
assert(i->tar_fd < 0);
i->final_path = strjoin(i->image_root, "/", i->local, NULL);
if (!i->final_path)
return log_oom();
r = tempfn_random(i->final_path, &i->temp_path);
if (r < 0)
return log_oom();
(void) mkdir_parents_label(i->temp_path, 0700);
r = btrfs_subvol_make(i->temp_path);
if (r == -ENOTTY) {
if (mkdir(i->temp_path, 0755) < 0)
return log_error_errno(errno, "Failed to create directory %s: %m", i->temp_path);
} else if (r < 0)
return log_error_errno(errno, "Failed to create subvolume %s: %m", i->temp_path);
i->tar_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (i->tar_fd < 0)
return i->tar_fd;
return 0;
}
static int add_symlink(const char *service, const char *where) {
_cleanup_free_ char *from = NULL, *to = NULL;
int r;
assert(service);
assert(where);
from = strjoin(SYSTEM_DATA_UNIT_PATH, "/", service, NULL);
if (!from)
return log_oom();
to = strjoin(arg_dest, "/", where, ".wants/", service, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
if (errno == EEXIST)
return 0;
log_error_errno(errno, "Failed to create symlink %s: %m", to);
return -errno;
}
return 1;
}
static int raw_pull_job_on_open_disk_settings(PullJob *j) {
RawPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->settings_job == j);
assert(!i->settings_path);
assert(!i->settings_temp_path);
r = pull_make_path(j->url, j->etag, i->image_root, ".settings-", NULL, &i->settings_path);
if (r < 0)
return log_oom();
r = tempfn_random(i->settings_path, NULL, &i->settings_temp_path);
if (r < 0)
return log_oom();
mkdir_parents_label(i->settings_temp_path, 0700);
j->disk_fd = open(i->settings_temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
if (j->disk_fd < 0)
return log_error_errno(errno, "Failed to create %s: %m", i->settings_temp_path);
return 0;
}
static int raw_pull_job_on_open_disk_raw(PullJob *j) {
RawPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->raw_job == j);
assert(!i->final_path);
assert(!i->temp_path);
r = pull_make_path(j->url, j->etag, i->image_root, ".raw-", ".raw", &i->final_path);
if (r < 0)
return log_oom();
r = tempfn_random(i->final_path, NULL, &i->temp_path);
if (r < 0)
return log_oom();
(void) mkdir_parents_label(i->temp_path, 0700);
j->disk_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
if (j->disk_fd < 0)
return log_error_errno(errno, "Failed to create %s: %m", i->temp_path);
r = chattr_fd(j->disk_fd, FS_NOCOW_FL, FS_NOCOW_FL);
if (r < 0)
log_warning_errno(errno, "Failed to set file attributes on %s: %m", i->temp_path);
return 0;
}
static int raw_pull_job_on_open_disk_generic(
RawPull *i,
PullJob *j,
const char *extra,
char **temp_path) {
int r;
assert(i);
assert(j);
assert(extra);
assert(temp_path);
if (!*temp_path) {
r = tempfn_random_child(i->image_root, extra, temp_path);
if (r < 0)
return log_oom();
}
(void) mkdir_parents_label(*temp_path, 0700);
j->disk_fd = open(*temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
if (j->disk_fd < 0)
return log_error_errno(errno, "Failed to create %s: %m", *temp_path);
return 0;
}
static int raw_import_open_disk(RawImport *i) {
int r;
assert(i);
assert(!i->final_path);
assert(!i->temp_path);
assert(i->output_fd < 0);
i->final_path = strjoin(i->image_root, "/", i->local, ".raw");
if (!i->final_path)
return log_oom();
r = tempfn_random(i->final_path, NULL, &i->temp_path);
if (r < 0)
return log_oom();
(void) mkdir_parents_label(i->temp_path, 0700);
i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
if (i->output_fd < 0)
return log_error_errno(errno, "Failed to open destination %s: %m", i->temp_path);
r = chattr_fd(i->output_fd, FS_NOCOW_FL, FS_NOCOW_FL);
if (r < 0)
log_warning_errno(r, "Failed to set file attributes on %s: %m", i->temp_path);
return 0;
}
static int tar_pull_job_on_open_disk_tar(PullJob *j) {
TarPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->tar_job == j);
assert(i->tar_pid <= 0);
if (!i->temp_path) {
r = tempfn_random_child(i->image_root, "tar", &i->temp_path);
if (r < 0)
return log_oom();
}
mkdir_parents_label(i->temp_path, 0700);
r = btrfs_subvol_make(i->temp_path);
if (r == -ENOTTY) {
if (mkdir(i->temp_path, 0755) < 0)
return log_error_errno(errno, "Failed to create directory %s: %m", i->temp_path);
} else if (r < 0)
return log_error_errno(r, "Failed to create subvolume %s: %m", i->temp_path);
else
(void) import_assign_pool_quota_and_warn(i->temp_path);
j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (j->disk_fd < 0)
return j->disk_fd;
return 0;
}
static int add_symlink(const char *service, const char *where) {
char *from = NULL, *to = NULL;
int r;
assert(service);
asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", service);
asprintf(&to, "%s/%s.wants/%s", arg_dest, where, service);
if (!from || !to) {
r = log_oom();
goto finish;
}
mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
if (errno == EEXIST)
r = 0;
else {
log_error("Failed to create symlink %s: %m", to);
r = -errno;
}
}
finish:
free(from);
free(to);
return r;
}
static int add_symlink(const char *fservice, const char *tservice) {
char *from = NULL, *to = NULL;
int r;
assert(fservice);
assert(tservice);
from = strappend(SYSTEM_DATA_UNIT_PATH "/", fservice);
to = strjoin(arg_dest,"/getty.target.wants/", tservice, NULL);
if (!from || !to) {
r = log_oom();
goto finish;
}
mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
if (errno == EEXIST)
/* In case console=hvc0 is passed this will very likely result in EEXIST */
r = 0;
else {
log_error("Failed to create symlink from %s to %s: %m", from, to);
r = -errno;
}
}
finish:
free(from);
free(to);
return r;
}
static int write_data_x11(void) {
FILE *f;
char *temp_path;
int r;
if (isempty(state.x11_layout) &&
isempty(state.x11_model) &&
isempty(state.x11_variant) &&
isempty(state.x11_options)) {
if (unlink("/etc/X11/xorg.conf.d/00-keyboard.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
mkdir_parents_label("/etc/X11/xorg.conf.d", 0755);
r = fopen_temporary("/etc/X11/xorg.conf.d/00-keyboard.conf", &f, &temp_path);
if (r < 0)
return r;
fchmod(fileno(f), 0644);
fputs("# Read and parsed by systemd-localed. It's probably wise not to edit this file\n"
"# manually too freely.\n"
"Section \"InputClass\"\n"
" Identifier \"system-keyboard\"\n"
" MatchIsKeyboard \"on\"\n", f);
if (!isempty(state.x11_layout))
fprintf(f, " Option \"XkbLayout\" \"%s\"\n", state.x11_layout);
if (!isempty(state.x11_model))
fprintf(f, " Option \"XkbModel\" \"%s\"\n", state.x11_model);
if (!isempty(state.x11_variant))
fprintf(f, " Option \"XkbVariant\" \"%s\"\n", state.x11_variant);
if (!isempty(state.x11_options))
fprintf(f, " Option \"XkbOptions\" \"%s\"\n", state.x11_options);
fputs("EndSection\n", f);
fflush(f);
if (ferror(f) || rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
r = -errno;
unlink("/etc/X11/xorg.conf.d/00-keyboard.conf");
unlink(temp_path);
} else
r = 0;
fclose(f);
free(temp_path);
return r;
}
static int link_busnames_target(const char *units) {
const char *f, *t;
f = strjoina(units, "/" SPECIAL_BUSNAMES_TARGET);
t = strjoina(arg_dest, "/" SPECIAL_BASIC_TARGET ".wants/" SPECIAL_BUSNAMES_TARGET);
mkdir_parents_label(t, 0755);
if (symlink(f, t) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", t);
return 0;
}
static int generate_display_manager_alias(void) {
_cleanup_free_ char *default_dm_path = NULL, *enabled_dm_unit = NULL;
const char *default_dm = NULL, *in_mem_symlink = NULL, *target_unit_path = NULL;
bool dm_service_exists = true;
int r;
r = read_full_file(default_dm_file, &default_dm_path, NULL);
if (r < 0) {
log_debug("No %s file, nothing to generate", default_dm_file);
return 0;
}
default_dm = strstrip(basename(default_dm_path));
r = readlink_value(dm_service_unit, &enabled_dm_unit);
if (r < 0) {
enabled_dm_unit = strdup("");
dm_service_exists = false;
}
/* all is fine if the info matches */
if (streq(strappenda(default_dm, ".service"), enabled_dm_unit))
return 0;
target_unit_path = strappenda(SYSTEM_DATA_UNIT_PATH, "/", default_dm, ".service");
/* we only create the alias symlink for non sysvinit services */
if (access(target_unit_path, F_OK) < 0 && (errno == ENOENT)) {
/* if the dm service was already disabled, nothing to be done */
if (!dm_service_exists) {
log_debug("No %s file, nothing to mask", dm_service_unit);
return 0;
}
log_warning("%s is not a systemd unit, we disable the systemd enabled display manager", target_unit_path);
target_unit_path = "/dev/null";
} else {
log_warning("%s points at %s while the default systemd unit is %s. Reconfiguring %s as default.",
default_dm_file, default_dm, enabled_dm_unit, default_dm);
}
in_mem_symlink = strappenda(dest, "/display-manager.service");
mkdir_parents_label(in_mem_symlink, 0755);
if (symlink(target_unit_path, in_mem_symlink) < 0) {
log_error("Failed to create symlink %s: %m", in_mem_symlink);
return -errno;
}
return 0;
}
static int add_swap(const char *path) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
assert(path);
log_debug("Adding swap: %s", path);
name = unit_name_from_path(path, ".swap");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
log_error("Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=Swap Partition\n"
"Documentation=man:systemd-gpt-auto-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
path);
fflush(f);
if (ferror(f)) {
log_error("Failed to write unit file %s: %m", unit);
return -errno;
}
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".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;
}
return 0;
}
int generator_add_symlink(const char *root, const char *dst, const char *dep_type, const char *src) {
/* Adds a symlink from <dst>.<dep_type>.d/ to ../<src> */
const char *from, *to;
from = strjoina("../", src);
to = strjoina(root, "/", dst, ".", dep_type, "/", src);
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
if (errno != EEXIST)
return log_error_errno(errno, "Failed to create symlink \"%s\": %m", to);
return 0;
}
static int add_fsck(FILE *f, const char *what, const char *where, const char *type, int passno) {
assert(f);
if (passno == 0)
return 0;
if (type && !streq(type, "auto")) {
int r;
const char *checker;
checker = strappenda("/sbin/fsck.", type);
r = access(checker, X_OK);
if (r < 0) {
log_warning("Checking was requested for %s, but %s cannot be used: %m", what, checker);
/* treat missing check as essentially OK */
return errno == ENOENT ? 0 : -errno;
}
}
if (streq(where, "/")) {
char *lnk;
lnk = strappenda(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service");
mkdir_parents_label(lnk, 0755);
if (symlink("systemd-fsck-root.service", lnk) < 0) {
log_error("Failed to create symlink %s: %m", lnk);
return -errno;
}
} else {
_cleanup_free_ char *fsck = NULL;
fsck = unit_name_from_path_instance("systemd-fsck", what, ".service");
if (!fsck)
return log_oom();
fprintf(f,
"RequiresOverridable=%s\n"
"After=%s\n",
fsck,
fsck);
}
return 0;
}
int cg_create(const char *controller, const char *path, const char *suffix) {
_cleanup_free_ char *fs = NULL;
int r;
#ifdef HAVE_CGMANAGER
/* CGManager support */
int existed;
if (cgm_dbus_connect()) {
if (!controller) {
cgm_dbus_disconnect();
return -1;
}
r = cgm_create(normalize_controller(controller),
path, &existed);
cgm_dbus_disconnect();
if (!r)
return -1;
return 1;
}
#endif
r = cg_get_path_and_check(controller, path, suffix, &fs);
if (r < 0)
return r;
r = mkdir_parents_label(fs, 0755);
if (r < 0)
return r;
if (mkdir(fs, 0755) < 0) {
if (errno == EEXIST)
return 0;
return -errno;
}
return 1;
}
static int process_resume(void) {
_cleanup_free_ char *name = NULL, *lnk = NULL;
if (!arg_resume_dev)
return 0;
name = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_dev, ".service");
if (!name)
return log_oom();
lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(SYSTEM_DATA_UNIT_PATH "/[email protected]", lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int add_symlink(const char *service, const char *where) {
const char *from, *to;
int r;
assert(service);
assert(where);
from = strjoina(SYSTEM_DATA_UNIT_PATH "/", service);
to = strjoina(arg_dest, "/", where, ".wants/", service);
(void) mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
if (errno == EEXIST)
return 0;
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
}
return 1;
}
static int add_symlink(const char *fservice, const char *tservice) {
char *from, *to;
int r;
assert(fservice);
assert(tservice);
from = strjoina(SYSTEM_DATA_UNIT_PATH "/", fservice);
to = strjoina(arg_dest, "/getty.target.wants/", tservice);
mkdir_parents_label(to, 0755);
r = symlink(from, to);
if (r < 0) {
/* In case console=hvc0 is passed this will very likely result in EEXIST */
if (errno == EEXIST)
return 0;
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
}
return 0;
}
static int dkr_pull_job_on_open_disk(PullJob *j) {
const char *base;
DkrPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->layer_job == j);
assert(i->final_path);
assert(!i->temp_path);
assert(i->tar_pid <= 0);
r = tempfn_random(i->final_path, &i->temp_path);
if (r < 0)
return log_oom();
mkdir_parents_label(i->temp_path, 0700);
base = dkr_pull_current_base_layer(i);
if (base) {
const char *base_path;
base_path = strjoina(i->image_root, "/.dkr-", base);
r = btrfs_subvol_snapshot(base_path, i->temp_path, BTRFS_SNAPSHOT_FALLBACK_COPY);
} else
r = btrfs_subvol_make(i->temp_path);
if (r < 0)
return log_error_errno(r, "Failed to make btrfs subvolume %s: %m", i->temp_path);
j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (j->disk_fd < 0)
return j->disk_fd;
return 0;
}
static int tar_pull_job_on_open_disk(PullJob *j) {
TarPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->tar_job == j);
assert(!i->final_path);
assert(!i->temp_path);
assert(i->tar_pid <= 0);
r = pull_make_path(j->url, j->etag, i->image_root, ".tar-", NULL, &i->final_path);
if (r < 0)
return log_oom();
r = tempfn_random(i->final_path, NULL, &i->temp_path);
if (r < 0)
return log_oom();
mkdir_parents_label(i->temp_path, 0700);
r = btrfs_subvol_make(i->temp_path);
if (r == -ENOTTY) {
if (mkdir(i->temp_path, 0755) < 0)
return log_error_errno(errno, "Failed to create directory %s: %m", i->temp_path);
} else if (r < 0)
return log_error_errno(errno, "Failed to create subvolume %s: %m", i->temp_path);
j->disk_fd = import_fork_tar_x(i->temp_path, &i->tar_pid);
if (j->disk_fd < 0)
return j->disk_fd;
return 0;
}
static int tar_pull_job_on_open_disk_settings(PullJob *j) {
TarPull *i;
int r;
assert(j);
assert(j->userdata);
i = j->userdata;
assert(i->settings_job == j);
if (!i->settings_temp_path) {
r = tempfn_random_child(i->image_root, "settings", &i->settings_temp_path);
if (r < 0)
return log_oom();
}
mkdir_parents_label(i->settings_temp_path, 0700);
j->disk_fd = open(i->settings_temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664);
if (j->disk_fd < 0)
return log_error_errno(errno, "Failed to create %s: %m", i->settings_temp_path);
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_close_ int seed_fd = -1, random_fd = -1;
_cleanup_free_ void* buf = NULL;
size_t buf_size = 0;
ssize_t k;
int r, open_rw_error;
FILE *f;
bool refresh_seed_file = true;
if (argc != 2) {
log_error("This program requires one argument.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
/* Read pool size, if possible */
f = fopen("/proc/sys/kernel/random/poolsize", "re");
if (f) {
if (fscanf(f, "%zu", &buf_size) > 0)
/* poolsize is in bits on 2.6, but we want bytes */
buf_size /= 8;
fclose(f);
}
if (buf_size <= POOL_SIZE_MIN)
buf_size = POOL_SIZE_MIN;
buf = malloc(buf_size);
if (!buf) {
r = log_oom();
goto finish;
}
r = mkdir_parents_label(RANDOM_SEED, 0755);
if (r < 0) {
log_error_errno(r, "Failed to create directory " RANDOM_SEED_DIR ": %m");
goto finish;
}
/* When we load the seed we read it and write it to the device
* and then immediately update the saved seed with new data,
* to make sure the next boot gets seeded differently. */
if (streq(argv[1], "load")) {
seed_fd = open(RANDOM_SEED, O_RDWR|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
open_rw_error = -errno;
if (seed_fd < 0) {
refresh_seed_file = false;
seed_fd = open(RANDOM_SEED, O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (seed_fd < 0) {
bool missing = errno == ENOENT;
log_full_errno(missing ? LOG_DEBUG : LOG_ERR,
open_rw_error, "Failed to open " RANDOM_SEED " for writing: %m");
r = log_full_errno(missing ? LOG_DEBUG : LOG_ERR,
errno, "Failed to open " RANDOM_SEED " for reading: %m");
if (missing)
r = 0;
goto finish;
}
}
random_fd = open("/dev/urandom", O_RDWR|O_CLOEXEC|O_NOCTTY, 0600);
if (random_fd < 0) {
random_fd = open("/dev/urandom", O_WRONLY|O_CLOEXEC|O_NOCTTY, 0600);
if (random_fd < 0) {
r = log_error_errno(errno, "Failed to open /dev/urandom: %m");
goto finish;
}
}
k = loop_read(seed_fd, buf, buf_size, false);
if (k < 0)
r = log_error_errno(k, "Failed to read seed from " RANDOM_SEED ": %m");
else if (k == 0) {
r = 0;
log_debug("Seed file " RANDOM_SEED " not yet initialized, proceeding.");
} else {
(void) lseek(seed_fd, 0, SEEK_SET);
r = loop_write(random_fd, buf, (size_t) k, false);
if (r < 0)
log_error_errno(r, "Failed to write seed to /dev/urandom: %m");
}
} else if (streq(argv[1], "save")) {
seed_fd = open(RANDOM_SEED, O_WRONLY|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
if (seed_fd < 0) {
r = log_error_errno(errno, "Failed to open " RANDOM_SEED ": %m");
goto finish;
}
random_fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (random_fd < 0) {
r = log_error_errno(errno, "Failed to open /dev/urandom: %m");
goto finish;
}
} else {
log_error("Unknown verb '%s'.", argv[1]);
r = -EINVAL;
goto finish;
}
if (refresh_seed_file) {
/* This is just a safety measure. Given that we are root and
* most likely created the file ourselves the mode and owner
* should be correct anyway. */
(void) fchmod(seed_fd, 0600);
(void) fchown(seed_fd, 0, 0);
k = loop_read(random_fd, buf, buf_size, false);
if (k < 0) {
r = log_error_errno(k, "Failed to read new seed from /dev/urandom: %m");
goto finish;
}
if (k == 0) {
log_error("Got EOF while reading from /dev/urandom.");
r = -EIO;
goto finish;
}
r = loop_write(seed_fd, buf, (size_t) k, false);
if (r < 0)
log_error_errno(r, "Failed to write new random seed file: %m");
}
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
static int create_dbus_files(
const char *path,
const char *name,
const char *service,
const char *exec,
const char *user,
const char *type) {
_cleanup_free_ char *b = NULL, *s = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(path);
assert(name);
assert(service || exec);
if (!service) {
_cleanup_free_ char *a = NULL;
s = strjoin("dbus-", name, ".service", NULL);
if (!s)
return log_oom();
a = strjoin(arg_dest_late, "/", s, NULL);
if (!a)
return log_oom();
f = fopen(a, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create %s: %m", a);
fprintf(f,
"# Automatically generated by systemd-dbus1-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Description=DBUS1: %s\n"
"Documentation=man:systemd-dbus1-generator(8)\n\n"
"[Service]\n"
"ExecStart=%s\n"
"Type=dbus\n"
"BusName=%s\n",
path,
name,
exec,
name);
if (user)
fprintf(f, "User=%s\n", user);
if (type) {
fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
if (streq(type, "system"))
fprintf(f, "Environment=DBUS_STARTER_ADDRESS=" DEFAULT_SYSTEM_BUS_ADDRESS "\n");
else if (streq(type, "session")) {
char *run;
run = getenv("XDG_RUNTIME_DIR");
if (!run) {
log_error("XDG_RUNTIME_DIR not set.");
return -EINVAL;
}
fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT "\n",
getuid(), run);
}
}
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write %s: %m", a);
f = safe_fclose(f);
service = s;
}
b = strjoin(arg_dest_late, "/", name, ".busname", NULL);
if (!b)
return log_oom();
f = fopen(b, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create %s: %m", b);
fprintf(f,
"# Automatically generated by systemd-dbus1-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Description=DBUS1: %s\n"
"Documentation=man:systemd-dbus1-generator(8)\n\n"
"[BusName]\n"
"Name=%s\n"
"Service=%s\n"
"AllowWorld=talk\n",
path,
name,
name,
service);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write %s: %m", b);
lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(b, lnk))
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int add_swap(const char *what, struct mntent *me) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
_cleanup_fclose_ FILE *f = NULL;
bool noauto, nofail;
int r, pri = -1;
assert(what);
assert(me);
r = mount_find_pri(me, &pri);
if (r < 0) {
log_error("Failed to parse priority");
return pri;
}
noauto = !!hasmntopt(me, "noauto");
nofail = !!hasmntopt(me, "nofail");
name = unit_name_from_path(what, ".swap");
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 swap 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;
}
fputs("# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"DefaultDependencies=no\n"
"Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
"Before=" SPECIAL_UMOUNT_TARGET "\n", f);
if (!noauto && !nofail)
fputs("Before=" SPECIAL_SWAP_TARGET "\n", f);
fprintf(f,
"\n"
"[Swap]\n"
"What=%s\n",
what);
if (pri >= 0)
fprintf(f,
"Priority=%i\n",
pri);
fflush(f);
if (ferror(f)) {
log_error("Failed to write unit file %s: %m", unit);
return -errno;
}
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".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;
}
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;
}
}
}
return 0;
}
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;
}
static int add_swap(
const char *what,
struct mntent *me,
bool noauto,
bool nofail) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container() > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = unit_name_from_path(what, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
unit = strjoin(arg_dest, "/", name);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f)
return log_error_errno(errno,
errno == EEXIST ?
"Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
"Failed to create unit file %s: %m",
unit);
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
if (!isempty(me->mnt_opts) && !streq(me->mnt_opts, "defaults"))
fprintf(f, "Options=%s\n", me->mnt_opts);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
nofail ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int node_symlink(struct udev_device *dev, 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 + 32];
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 = strpcpy(&s, l, "../");
i++;
}
l = 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", 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 (streq(target, buf)) {
log_debug("preserve already existing symlink '%s' to '%s'", 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'", slink, target);
do {
err = mkdir_parents_label(slink, 0755);
if (err != 0 && err != -ENOENT)
break;
mac_selinux_create_file_prepare(slink, S_IFLNK);
err = symlink(target, slink);
if (err != 0)
err = -errno;
mac_selinux_create_file_clear();
} while (err == -ENOENT);
if (err == 0)
goto exit;
}
log_debug("atomically replace '%s'", slink);
strscpyl(slink_tmp, sizeof(slink_tmp), slink, ".tmp-", udev_device_get_id_filename(dev), NULL);
unlink(slink_tmp);
do {
err = mkdir_parents_label(slink_tmp, 0755);
if (err != 0 && err != -ENOENT)
break;
mac_selinux_create_file_prepare(slink_tmp, S_IFLNK);
err = symlink(target, slink_tmp);
if (err != 0)
err = -errno;
mac_selinux_create_file_clear();
} while (err == -ENOENT);
if (err != 0) {
log_error_errno(errno, "symlink '%s' '%s' failed: %m", target, slink_tmp);
goto exit;
}
err = rename(slink_tmp, slink);
if (err != 0) {
log_error_errno(errno, "rename '%s' '%s' failed: %m", slink_tmp, slink);
unlink(slink_tmp);
}
exit:
return err;
}
static int node_symlink(sd_device *dev, const char *node, const char *slink) {
_cleanup_free_ char *slink_dirname = NULL, *target = NULL;
const char *id_filename, *slink_tmp;
struct stat stats;
int r;
assert(dev);
assert(node);
assert(slink);
slink_dirname = dirname_malloc(slink);
if (!slink_dirname)
return log_oom();
/* use relative link */
r = path_make_relative(slink_dirname, node, &target);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get relative path from '%s' to '%s': %m", slink, node);
/* 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_device_error(dev, "Conflicting device node '%s' found, link to '%s' will not be created.", slink, node);
return -EOPNOTSUPP;
} else if (S_ISLNK(stats.st_mode)) {
_cleanup_free_ char *buf = NULL;
if (readlink_malloc(slink, &buf) >= 0 &&
streq(target, buf)) {
log_device_debug(dev, "Preserve already existing symlink '%s' to '%s'", slink, target);
(void) label_fix(slink, LABEL_IGNORE_ENOENT);
(void) utimensat(AT_FDCWD, slink, NULL, AT_SYMLINK_NOFOLLOW);
return 0;
}
}
} else {
log_device_debug(dev, "Creating symlink '%s' to '%s'", slink, target);
do {
r = mkdir_parents_label(slink, 0755);
if (!IN_SET(r, 0, -ENOENT))
break;
mac_selinux_create_file_prepare(slink, S_IFLNK);
if (symlink(target, slink) < 0)
r = -errno;
mac_selinux_create_file_clear();
} while (r == -ENOENT);
if (r == 0)
return 0;
if (r < 0)
log_device_debug_errno(dev, r, "Failed to create symlink '%s' to '%s', trying to replace '%s': %m", slink, target, slink);
}
log_device_debug(dev, "Atomically replace '%s'", slink);
r = device_get_id_filename(dev, &id_filename);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get id_filename: %m");
slink_tmp = strjoina(slink, ".tmp-", id_filename);
(void) unlink(slink_tmp);
do {
r = mkdir_parents_label(slink_tmp, 0755);
if (!IN_SET(r, 0, -ENOENT))
break;
mac_selinux_create_file_prepare(slink_tmp, S_IFLNK);
if (symlink(target, slink_tmp) < 0)
r = -errno;
mac_selinux_create_file_clear();
} while (r == -ENOENT);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to create symlink '%s' to '%s': %m", slink_tmp, target);
if (rename(slink_tmp, slink) < 0) {
r = log_device_error_errno(dev, errno, "Failed to rename '%s' to '%s' failed: %m", slink_tmp, slink);
(void) unlink(slink_tmp);
}
return r;
}
