int generator_hook_up_growfs(
const char *dir,
const char *where,
const char *target) {
_cleanup_free_ char *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
escaped = cescape(where);
if (!escaped)
return log_oom();
r = unit_name_from_path_instance("systemd-growfs", where, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
where);
r = unit_name_from_path(where, ".mount", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
where);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Grow File System on %%f\n"
"Documentation=man:[email protected](8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.mount\n"
"After=%%i.mount\n"
"Before=shutdown.target\n"
"Before=%s\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_GROWFS_PATH " %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
target,
escaped);
return generator_add_symlink(dir, where_unit, "wants", unit);
}
static int add_container_getty(const char *tty) {
_cleanup_free_ char *n = NULL;
int r;
assert(tty);
log_debug("Automatically adding container getty for /dev/pts/%s.", tty);
r = unit_name_from_path_instance("container-getty", tty, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate service name: %m");
return add_symlink("[email protected]", n);
}
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 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;
}
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;
}
int generator_hook_up_mkfs(
const char *dir,
const char *what,
const char *where,
const char *type) {
_cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
node = fstab_node_to_udev_node(what);
if (!node)
return log_oom();
/* Nothing to work on. */
if (!is_device_path(node)) {
log_error("Cannot format something that is not a device node: %s", node);
return -EINVAL;
}
if (!type || streq(type, "auto")) {
log_error("Cannot format partition %s, filesystem type is not specified", node);
return -EINVAL;
}
r = unit_name_from_path_instance("systemd-mkfs", node, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
node);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
escaped = cescape(node);
if (!escaped)
return log_oom();
r = unit_name_from_path(where, ".mount", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
where);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Make File System on %%f\n"
"Documentation=man:[email protected](8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.device\n"
"After=%%i.device\n"
/* fsck might or might not be used, so let's be safe and order
* ourselves before both [email protected] and the mount unit. */
"Before=systemd-fsck@%%i.service\n"
"Before=%s\n"
"Before=shutdown.target\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_MAKEFS_PATH " %s %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
where_unit,
type,
escaped);
// XXX: what about local-fs-pre.target?
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit_file);
return generator_add_symlink(dir, where_unit, "requires", unit);
}
int generator_hook_up_mkswap(
const char *dir,
const char *what) {
_cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
node = fstab_node_to_udev_node(what);
if (!node)
return log_oom();
/* Nothing to work on. */
if (!is_device_path(node)) {
log_error("Cannot format something that is not a device node: %s", node);
return -EINVAL;
}
r = unit_name_from_path_instance("systemd-mkswap", node, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
node);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
escaped = cescape(node);
if (!escaped)
return log_oom();
r = unit_name_from_path(what, ".swap", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
what);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Make Swap on %%f\n"
"Documentation=man:[email protected](8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.device\n"
"After=%%i.device\n"
"Before=%s\n"
"Before=shutdown.target\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_MAKEFS_PATH " swap %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
where_unit,
escaped);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit_file);
return generator_add_symlink(dir, where_unit, "requires", unit);
}
int generator_write_fsck_deps(
FILE *f,
const char *dir,
const char *what,
const char *where,
const char *fstype) {
int r;
assert(f);
assert(dir);
assert(what);
assert(where);
if (!is_device_path(what)) {
log_warning("Checking was requested for \"%s\", but it is not a device.", what);
return 0;
}
if (!isempty(fstype) && !streq(fstype, "auto")) {
r = fsck_exists(fstype);
if (r < 0)
log_warning_errno(r, "Checking was requested for %s, but couldn't detect if fsck.%s may be used, proceeding: %m", what, fstype);
else if (r == 0) {
/* treat missing check as essentially OK */
log_debug("Checking was requested for %s, but fsck.%s does not exist.", what, fstype);
return 0;
}
}
if (path_equal(where, "/")) {
const char *lnk;
lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service");
mkdir_parents(lnk, 0755);
if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
} else {
_cleanup_free_ char *_fsck = NULL;
const char *fsck;
if (in_initrd() && path_equal(where, "/sysroot")) {
r = write_fsck_sysroot_service(dir, what);
if (r < 0)
return r;
fsck = "systemd-fsck-root.service";
} else {
r = unit_name_from_path_instance("systemd-fsck", what, ".service", &_fsck);
if (r < 0)
return log_error_errno(r, "Failed to create fsck service name: %m");
fsck = _fsck;
}
fprintf(f,
"Requires=%1$s\n"
"After=%1$s\n",
fsck);
}
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,
const char *post,
const char *source) {
_cleanup_free_ char
*name = NULL, *unit = NULL, *lnk = NULL,
*automount_name = NULL, *automount_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
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",
source);
if (post && !noauto && !nofail && !automount)
fprintf(f,
"Before=%s\n",
post);
if (passno > 0) {
if (streq(where, "/")) {
lnk = strjoin(arg_dest, "/", SPECIAL_LOCAL_FS_TARGET, ".wants/", "systemd-fsck-root.service", NULL);
if (!lnk)
return log_oom();
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,
"Requires=%s\n"
"After=%s\n",
fsck,
fsck);
}
}
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
"Where=%s\n"
"Type=%s\n",
what,
where,
type);
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) {
if (post) {
free(lnk);
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 (automount && !path_equal(where, "/")) {
automount_name = unit_name_from_path(where, ".automount");
if (!automount_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",
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 create_disk(
const char *name,
const char *device,
const char *password,
const char *options) {
_cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
_cleanup_fclose_ FILE *f = NULL;
bool noauto, nofail, tmp, swap;
assert(name);
assert(device);
noauto = has_option(options, "noauto");
nofail = has_option(options, "nofail");
tmp = has_option(options, "tmp");
swap = has_option(options, "swap");
if (tmp && swap) {
log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
return -EINVAL;
}
n = unit_name_from_path_instance("systemd-cryptsetup", name, ".service");
if (!n)
return log_oom();
p = strjoin(arg_dest, "/", n, NULL);
if (!p)
return log_oom();
u = fstab_node_to_udev_node(device);
if (!u)
return log_oom();
d = unit_name_from_path(u, ".device");
if (!d)
return log_oom();
f = fopen(p, "wxe");
if (!f) {
log_error("Failed to create unit file %s: %m", p);
return -errno;
}
fputs(
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %I\n"
"Documentation=man:[email protected](8) man:crypttab(5)\n"
"SourcePath=/etc/crypttab\n"
"Conflicts=umount.target\n"
"DefaultDependencies=no\n"
"BindsTo=dev-mapper-%i.device\n"
"IgnoreOnIsolate=true\n"
"After=systemd-readahead-collect.service systemd-readahead-replay.service\n",
f);
if (!nofail)
fprintf(f,
"Before=cryptsetup.target\n");
if (password) {
if (streq(password, "/dev/urandom") ||
streq(password, "/dev/random") ||
streq(password, "/dev/hw_random"))
fputs("After=systemd-random-seed.service\n", f);
else if (!streq(password, "-") &&
!streq(password, "none"))
fprintf(f,
"RequiresMountsFor=%s\n",
password);
}
if (is_device_path(u))
fprintf(f,
"BindsTo=%s\n"
"After=%s\n"
"Before=umount.target\n",
d, d);
else
fprintf(f,
"RequiresMountsFor=%s\n",
u);
fprintf(f,
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
name, u, strempty(password), strempty(options),
name);
if (tmp)
fprintf(f,
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
name);
if (swap)
fprintf(f,
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
name);
fflush(f);
if (ferror(f)) {
log_error("Failed to write file %s: %m", p);
return -errno;
}
if (asprintf(&from, "../%s", n) < 0)
return log_oom();
if (!noauto) {
to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink %s: %m", to);
return -errno;
}
free(to);
if (!nofail)
to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
else
to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink %s: %m", to);
return -errno;
}
}
e = unit_name_escape(name);
if (!e)
return log_oom();
free(to);
to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink %s: %m", to);
return -errno;
}
if (!noauto && !nofail) {
int r;
free(p);
p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL);
if (!p)
return log_oom();
mkdir_parents_label(p, 0755);
r = write_string_file(p,
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"JobTimeoutSec=0\n"); /* the binary handles timeouts anyway */
if (r)
return r;
}
return 0;
}
