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-rw-r--r--src/shared/generator.c888
1 files changed, 888 insertions, 0 deletions
diff --git a/src/shared/generator.c b/src/shared/generator.c
new file mode 100644
index 0000000..5626587
--- /dev/null
+++ b/src/shared/generator.c
@@ -0,0 +1,888 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "cgroup-util.h"
+#include "dropin.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fstab-util.h"
+#include "generator.h"
+#include "initrd-util.h"
+#include "log.h"
+#include "macro.h"
+#include "mkdir-label.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "special.h"
+#include "specifier.h"
+#include "string-util.h"
+#include "time-util.h"
+#include "tmpfile-util.h"
+#include "unit-name.h"
+
+int generator_open_unit_file_full(
+ const char *dir,
+ const char *source,
+ const char *fn,
+ FILE **ret_file,
+ char **ret_temp_path) {
+
+ _cleanup_free_ char *p = NULL;
+ FILE *f;
+ int r;
+
+ assert(dir);
+ assert(ret_file);
+
+ /* If <ret_temp_path> is specified, it creates a temporary unit file and also returns its
+ * temporary path. */
+
+ if (ret_temp_path) {
+ r = fopen_temporary(dir, &f, &p);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create temporary unit file in '%s': %m", dir);
+
+ (void) fchmod(fileno(f), 0644);
+
+ *ret_temp_path = TAKE_PTR(p);
+ } else {
+ assert(fn);
+
+ p = path_join(dir, fn);
+ if (!p)
+ return log_oom();
+
+ r = fopen_unlocked(p, "wxe", &f);
+ if (r < 0) {
+ if (source && r == -EEXIST)
+ return log_error_errno(r,
+ "Failed to create unit file '%s', as it already exists. Duplicate entry in '%s'?",
+ p, source);
+
+ return log_error_errno(r, "Failed to create unit file '%s': %m", p);
+ }
+ }
+
+ fprintf(f,
+ "# Automatically generated by %s\n\n",
+ program_invocation_short_name);
+
+ *ret_file = f;
+ return 0;
+}
+
+
+int generator_add_symlink_full(
+ const char *dir,
+ const char *dst,
+ const char *dep_type,
+ const char *src,
+ const char *instance) {
+
+ _cleanup_free_ char *dn = NULL, *fn = NULL, *instantiated = NULL, *to = NULL, *from = NULL;
+ int r;
+
+ assert(dir);
+ assert(dst);
+ assert(dep_type);
+ assert(src);
+
+ /* Adds a symlink from <dst>.<dep_type>/ to <src> (if src is absolute) or ../<src> (otherwise). If
+ * <instance> is specified, then <src> must be a template unit name, and we'll instantiate it. */
+
+ r = path_extract_directory(src, &dn);
+ if (r < 0 && r != -EDESTADDRREQ) /* EDESTADDRREQ → just a file name was passed */
+ return log_error_errno(r, "Failed to extract directory name from '%s': %m", src);
+
+ r = path_extract_filename(src, &fn);
+ if (r < 0)
+ return log_error_errno(r, "Failed to extract file name from '%s': %m", src);
+ if (r == O_DIRECTORY)
+ return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Expected path to regular file name, but got '%s', refusing.", src);
+
+ if (instance) {
+ r = unit_name_replace_instance(fn, instance, &instantiated);
+ if (r < 0)
+ return log_error_errno(r, "Failed to instantiate '%s' for '%s': %m", fn, instance);
+ }
+
+ from = path_join(dn ?: "..", fn);
+ if (!from)
+ return log_oom();
+
+ to = strjoin(dir, "/", dst, ".", dep_type, "/", instantiated ?: fn);
+ if (!to)
+ return log_oom();
+
+ (void) mkdir_parents_label(to, 0755);
+
+ if (symlink(from, to) < 0 && errno != EEXIST)
+ return log_error_errno(errno, "Failed to create symlink \"%s\": %m", to);
+
+ return 0;
+}
+
+static int generator_add_ordering(
+ const char *dir,
+ const char *src,
+ const char *order,
+ const char *dst,
+ const char *instance) {
+
+ _cleanup_free_ char *instantiated = NULL, *p = NULL, *fn = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *to;
+ int r;
+
+ assert(dir);
+ assert(src);
+ assert(order);
+ assert(dst);
+
+ /* Adds in an explicit ordering dependency of type <order> from <src> to <dst>. If <instance> is
+ * specified, it is inserted into <dst>. */
+
+ if (instance) {
+ r = unit_name_replace_instance(dst, instance, &instantiated);
+ if (r < 0)
+ return log_error_errno(r, "Failed to instantiate '%s' for '%s': %m", dst, instance);
+
+ to = instantiated;
+ } else
+ to = dst;
+
+ fn = strjoin(src, ".d/50-order-", to, ".conf");
+ if (!fn)
+ return log_oom();
+
+ p = path_join(dir, fn);
+ if (!p)
+ return log_oom();
+
+ (void) mkdir_parents_label(p, 0755);
+
+ r = fopen_unlocked(p, "wxe", &f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create '%s': %m", p);
+
+ fprintf(f,
+ "# Automatically generated by %s\n\n"
+ "[Unit]\n"
+ "%s=%s\n",
+ program_invocation_short_name,
+ order,
+ to);
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write drop-in '%s': %m", p);
+
+ return 0;
+}
+
+static int write_fsck_sysroot_service(
+ const char *unit, /* Either SPECIAL_FSCK_ROOT_SERVICE or SPECIAL_FSCK_USR_SERVICE */
+ const char *dir,
+ const char *what,
+ const char *extra_after) {
+
+ _cleanup_free_ char *device = NULL, *escaped = NULL, *escaped2 = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(unit);
+ assert(dir);
+ assert(what);
+
+ /* Writes out special versions of systemd-fsck-root.service and systemd-fsck-usr.service for use in
+ * the initrd. The regular statically shipped versions of these unit files use / and /usr for as
+ * paths, which doesn't match what we need for the initrd (where the dirs are /sysroot +
+ * /sysusr/usr), hence we overwrite those versions here. */
+
+ escaped = specifier_escape(what);
+ if (!escaped)
+ return log_oom();
+
+ escaped2 = cescape(escaped);
+ if (!escaped2)
+ return log_oom();
+
+ r = unit_name_from_path(what, ".device", &device);
+ if (r < 0)
+ return log_error_errno(r, "Failed to convert device \"%s\" to unit name: %m", what);
+
+ r = generator_open_unit_file(dir, /* source = */ NULL, unit, &f);
+ if (r < 0)
+ return r;
+
+ fprintf(f,
+ "[Unit]\n"
+ "Description=File System Check on %1$s\n"
+ "Documentation=man:%2$s(8)\n"
+ "\n"
+ "DefaultDependencies=no\n"
+ "BindsTo=%3$s\n"
+ "Conflicts=shutdown.target\n"
+ "After=%4$s%5$slocal-fs-pre.target %3$s\n"
+ "Before=shutdown.target\n"
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "ExecStart=" SYSTEMD_FSCK_PATH " %6$s\n"
+ "TimeoutSec=infinity\n",
+ escaped,
+ unit,
+ device,
+ strempty(extra_after),
+ isempty(extra_after) ? "" : " ",
+ escaped2);
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write unit %s: %m", unit);
+
+ return 0;
+}
+
+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);
+
+ /* Let's do an early exit if we are invoked for the root and /usr/ trees in the initrd, to avoid
+ * generating confusing log messages */
+ if (in_initrd() && PATH_IN_SET(where, "/", "/usr")) {
+ log_debug("Skipping fsck for %s in initrd.", where);
+ return 0;
+ }
+
+ 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_for_fstype(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;
+ }
+ } else {
+ r = fsck_exists();
+ if (r < 0)
+ log_warning_errno(r, "Checking was requested for %s, but couldn't detect if the fsck command may be used, proceeding: %m", what);
+ else if (r == 0) {
+ /* treat missing fsck as essentially OK */
+ log_debug("Checking was requested for %s, but the fsck command does not exist.", what);
+ return 0;
+ }
+ }
+
+ if (path_equal(where, "/")) {
+ const char *lnk;
+
+ /* We support running the fsck instance for the root fs while it is already mounted, for
+ * compatibility with non-initrd boots. It's ugly, but it is how it is. Since – unlike for
+ * regular file systems – this means the ordering is reversed (i.e. mount *before* fsck) we
+ * have a separate fsck unit for this, independent of systemd-fsck@.service. */
+
+ lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/" SPECIAL_FSCK_ROOT_SERVICE);
+
+ (void) mkdir_parents(lnk, 0755);
+ if (symlink(SYSTEM_DATA_UNIT_DIR "/" SPECIAL_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, *dep;
+
+ if (in_initrd() && path_equal(where, "/sysroot")) {
+ r = write_fsck_sysroot_service(SPECIAL_FSCK_ROOT_SERVICE, dir, what, SPECIAL_INITRD_ROOT_DEVICE_TARGET);
+ if (r < 0)
+ return r;
+
+ fsck = SPECIAL_FSCK_ROOT_SERVICE;
+ dep = "Requires";
+
+ } else if (in_initrd() && path_equal(where, "/sysusr/usr")) {
+ r = write_fsck_sysroot_service(SPECIAL_FSCK_USR_SERVICE, dir, what, NULL);
+ if (r < 0)
+ return r;
+
+ fsck = SPECIAL_FSCK_USR_SERVICE;
+ dep = "Requires";
+ } else {
+ /* When this is /usr, then let's add a Wants= dependency, otherwise a Requires=
+ * dependency. Why? We can't possibly unmount /usr during shutdown, but if we have a
+ * Requires= from /usr onto a fsck@.service unit and that unit is shut down, then
+ * we'd have to unmount /usr too. */
+
+ dep = path_equal(where, "/usr") ? "Wants" : "Requires";
+
+ 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,
+ "%1$s=%2$s\n"
+ "After=%2$s\n",
+ dep, fsck);
+ }
+
+ return 0;
+}
+
+int generator_write_timeouts(
+ const char *dir,
+ const char *what,
+ const char *where,
+ const char *opts,
+ char **filtered) {
+
+ /* Configure how long we wait for a device that backs a mount point or a
+ * swap partition to show up. This is useful to support endless device timeouts
+ * for devices that show up only after user input, like crypto devices. */
+
+ _cleanup_free_ char *node = NULL, *unit = NULL, *timeout = NULL;
+ usec_t u;
+ int r;
+
+ r = fstab_filter_options(opts, "comment=systemd.device-timeout\0"
+ "x-systemd.device-timeout\0",
+ NULL, &timeout, NULL, filtered);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to parse fstab options, ignoring: %m");
+ return 0;
+ }
+ if (r == 0)
+ return 0;
+
+ r = parse_sec_fix_0(timeout, &u);
+ if (r < 0) {
+ log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout);
+ return 0;
+ }
+
+ node = fstab_node_to_udev_node(what);
+ if (!node)
+ return log_oom();
+ if (!is_device_path(node)) {
+ log_warning("x-systemd.device-timeout ignored for %s", what);
+ return 0;
+ }
+
+ r = unit_name_from_path(node, ".device", &unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make unit name from path: %m");
+
+ return write_drop_in_format(dir, unit, 50, "device-timeout",
+ "# Automatically generated by %s\n"
+ "# from supplied options \"%s\"\n\n"
+ "[Unit]\n"
+ "JobRunningTimeoutSec=%s",
+ program_invocation_short_name,
+ opts,
+ timeout);
+}
+
+int generator_write_device_deps(
+ const char *dir,
+ const char *what,
+ const char *where,
+ const char *opts) {
+
+ /* fstab records that specify _netdev option should apply the network
+ * ordering on the actual device depending on network connection. If we
+ * are not mounting real device (NFS, CIFS), we rely on _netdev effect
+ * on the mount unit itself. */
+
+ _cleanup_free_ char *node = NULL, *unit = NULL;
+ int r;
+
+ if (fstab_is_extrinsic(where, opts))
+ return 0;
+
+ if (!fstab_test_option(opts, "_netdev\0"))
+ return 0;
+
+ node = fstab_node_to_udev_node(what);
+ if (!node)
+ return log_oom();
+
+ /* Nothing to apply dependencies to. */
+ if (!is_device_path(node))
+ return 0;
+
+ r = unit_name_from_path(node, ".device", &unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
+ node);
+
+ /* See mount_add_default_dependencies for explanation why we create such
+ * dependencies. */
+ return write_drop_in_format(dir, unit, 50, "netdev-dependencies",
+ "# Automatically generated by %s\n\n"
+ "[Unit]\n"
+ "After=" SPECIAL_NETWORK_ONLINE_TARGET " " SPECIAL_NETWORK_TARGET "\n"
+ "Wants=" SPECIAL_NETWORK_ONLINE_TARGET "\n",
+ program_invocation_short_name);
+}
+
+int generator_write_initrd_root_device_deps(const char *dir, const char *what) {
+ _cleanup_free_ char *unit = NULL;
+ int r;
+
+ r = unit_name_from_path(what, ".device", &unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
+ what);
+
+ return write_drop_in_format(dir, SPECIAL_INITRD_ROOT_DEVICE_TARGET, 50, "root-device",
+ "# Automatically generated by %s\n\n"
+ "[Unit]\n"
+ "Requires=%s\n"
+ "After=%s",
+ program_invocation_short_name,
+ unit,
+ 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;
+ int r;
+
+ assert(dir);
+ assert(what);
+
+ node = fstab_node_to_udev_node(what);
+ if (!node)
+ return log_oom();
+
+ /* Nothing to work on. */
+ if (!is_device_path(node))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Cannot format something that is not a device node: %s",
+ node);
+
+ 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);
+
+ 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);
+
+ r = generator_open_unit_file(dir, /* source = */ NULL, unit, &f);
+ if (r < 0)
+ return r;
+
+ fprintf(f,
+ "[Unit]\n"
+ "Description=Make Swap on %%f\n"
+ "Documentation=man:systemd-mkswap@.service(8)\n"
+ "\n"
+ "DefaultDependencies=no\n"
+ "BindsTo=%%i.device\n"
+ "After=%%i.device\n"
+ "Before=%s\n"
+ "Conflicts=shutdown.target\n"
+ "Before=shutdown.target\n"
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "ExecStart="SYSTEMD_MAKEFS_PATH " swap %s\n"
+ "TimeoutSec=infinity\n",
+ where_unit,
+ escaped);
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to write unit %s: %m", unit);
+
+ return generator_add_symlink(dir, where_unit, "requires", unit);
+}
+
+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 *fsck_unit;
+ int r;
+
+ assert(dir);
+ assert(what);
+ assert(where);
+
+ node = fstab_node_to_udev_node(what);
+ if (!node)
+ return log_oom();
+
+ /* Nothing to work on. */
+ if (!is_device_path(node))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Cannot format something that is not a device node: %s",
+ node);
+
+ if (!type || streq(type, "auto"))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Cannot format partition %s, filesystem type is not specified",
+ node);
+
+ r = unit_name_from_path_instance("systemd-makefs", node, ".service", &unit);
+ if (r < 0)
+ return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
+ node);
+
+ if (in_initrd() && path_equal(where, "/sysroot"))
+ fsck_unit = SPECIAL_FSCK_ROOT_SERVICE;
+ else if (in_initrd() && path_equal(where, "/sysusr/usr"))
+ fsck_unit = SPECIAL_FSCK_USR_SERVICE;
+ else
+ fsck_unit = "systemd-fsck@%i.service";
+
+ 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);
+
+ r = generator_open_unit_file(dir, /* source = */ NULL, unit, &f);
+ if (r < 0)
+ return r;
+
+ fprintf(f,
+ "[Unit]\n"
+ "Description=Make File System on %%f\n"
+ "Documentation=man:systemd-makefs@.service(8)\n"
+ "\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 systemd-fsck@.service and the mount unit. */
+ "Before=%s %s\n"
+ "Conflicts=shutdown.target\n"
+ "Before=shutdown.target\n"
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "ExecStart="SYSTEMD_MAKEFS_PATH " %s %s\n"
+ "TimeoutSec=infinity\n",
+ fsck_unit,
+ 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 %s: %m", unit);
+
+ return generator_add_symlink(dir, where_unit, "requires", unit);
+}
+
+int generator_hook_up_growfs(
+ const char *dir,
+ const char *where,
+ const char *target) {
+
+ const char *growfs_unit, *growfs_unit_path;
+ _cleanup_free_ char *where_unit = NULL, *instance = NULL;
+ int r;
+
+ assert(dir);
+ assert(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);
+
+ if (empty_or_root(where)) {
+ growfs_unit = SPECIAL_GROWFS_ROOT_SERVICE;
+ growfs_unit_path = SYSTEM_DATA_UNIT_DIR "/" SPECIAL_GROWFS_ROOT_SERVICE;
+ } else {
+ growfs_unit = SPECIAL_GROWFS_SERVICE;
+ growfs_unit_path = SYSTEM_DATA_UNIT_DIR "/" SPECIAL_GROWFS_SERVICE;
+
+ r = unit_name_path_escape(where, &instance);
+ if (r < 0)
+ return log_error_errno(r, "Failed to escape path '%s': %m", where);
+ }
+
+ if (target) {
+ r = generator_add_ordering(dir, target, "After", growfs_unit, instance);
+ if (r < 0)
+ return r;
+ }
+
+ return generator_add_symlink_full(dir, where_unit, "wants", growfs_unit_path, instance);
+}
+
+int generator_hook_up_pcrfs(
+ const char *dir,
+ const char *where,
+ const char *target) {
+
+ const char *pcrfs_unit, *pcrfs_unit_path;
+ _cleanup_free_ char *where_unit = NULL, *instance = NULL;
+ int r;
+
+ assert(dir);
+ assert(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);
+
+ if (empty_or_root(where)) {
+ pcrfs_unit = SPECIAL_PCRFS_ROOT_SERVICE;
+ pcrfs_unit_path = SYSTEM_DATA_UNIT_DIR "/" SPECIAL_PCRFS_ROOT_SERVICE;
+ } else {
+ pcrfs_unit = SPECIAL_PCRFS_SERVICE;
+ pcrfs_unit_path = SYSTEM_DATA_UNIT_DIR "/" SPECIAL_PCRFS_SERVICE;
+
+ r = unit_name_path_escape(where, &instance);
+ if (r < 0)
+ return log_error_errno(r, "Failed to escape path '%s': %m", where);
+ }
+
+ if (target) {
+ r = generator_add_ordering(dir, target, "After", pcrfs_unit, instance);
+ if (r < 0)
+ return r;
+ }
+
+ return generator_add_symlink_full(dir, where_unit, "wants", pcrfs_unit_path, instance);
+}
+
+int generator_enable_remount_fs_service(const char *dir) {
+ /* Pull in systemd-remount-fs.service */
+ return generator_add_symlink(dir, SPECIAL_LOCAL_FS_TARGET, "wants",
+ SYSTEM_DATA_UNIT_DIR "/" SPECIAL_REMOUNT_FS_SERVICE);
+}
+
+int generator_write_blockdev_dependency(
+ FILE *f,
+ const char *what) {
+
+ _cleanup_free_ char *escaped = NULL;
+ int r;
+
+ assert(f);
+ assert(what);
+
+ if (!path_startswith(what, "/dev/"))
+ return 0;
+
+ r = unit_name_path_escape(what, &escaped);
+ if (r < 0)
+ return log_error_errno(r, "Failed to escape device node path %s: %m", what);
+
+ fprintf(f,
+ "After=blockdev@%s.target\n",
+ escaped);
+
+ return 0;
+}
+
+int generator_write_cryptsetup_unit_section(
+ FILE *f,
+ const char *source) {
+
+ assert(f);
+
+ fprintf(f,
+ "[Unit]\n"
+ "Description=Cryptography Setup for %%I\n"
+ "Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:systemd-cryptsetup@.service(8)\n");
+
+ if (source)
+ fprintf(f, "SourcePath=%s\n", source);
+
+ fprintf(f,
+ "\n"
+ "DefaultDependencies=no\n"
+ "After=cryptsetup-pre.target systemd-udevd-kernel.socket systemd-tpm2-setup-early.service\n"
+ "Before=blockdev@dev-mapper-%%i.target\n"
+ "Wants=blockdev@dev-mapper-%%i.target\n"
+ "IgnoreOnIsolate=true\n");
+
+ return 0;
+}
+
+int generator_write_cryptsetup_service_section(
+ FILE *f,
+ const char *name,
+ const char *what,
+ const char *key_file,
+ const char *options) {
+
+ _cleanup_free_ char *name_escaped = NULL, *what_escaped = NULL, *key_file_escaped = NULL, *options_escaped = NULL;
+
+ assert(f);
+ assert(name);
+ assert(what);
+
+ name_escaped = specifier_escape(name);
+ if (!name_escaped)
+ return log_oom();
+
+ what_escaped = specifier_escape(what);
+ if (!what_escaped)
+ return log_oom();
+
+ if (key_file) {
+ key_file_escaped = specifier_escape(key_file);
+ if (!key_file_escaped)
+ return log_oom();
+ }
+
+ if (options) {
+ options_escaped = specifier_escape(options);
+ if (!options_escaped)
+ return log_oom();
+ }
+
+ fprintf(f,
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "TimeoutSec=infinity\n" /* The binary handles timeouts on its own */
+ "KeyringMode=shared\n" /* Make sure we can share cached keys among instances */
+ "OOMScoreAdjust=500\n" /* Unlocking can allocate a lot of memory if Argon2 is used */
+ "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
+ "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
+ name_escaped, what_escaped, strempty(key_file_escaped), strempty(options_escaped),
+ name_escaped);
+
+ return 0;
+}
+
+int generator_write_veritysetup_unit_section(
+ FILE *f,
+ const char *source) {
+
+ assert(f);
+
+ fprintf(f,
+ "[Unit]\n"
+ "Description=Integrity Protection Setup for %%I\n"
+ "Documentation=man:veritytab(5) man:systemd-veritysetup-generator(8) man:systemd-veritysetup@.service(8)\n");
+
+ if (source)
+ fprintf(f, "SourcePath=%s\n", source);
+
+ fprintf(f,
+ "DefaultDependencies=no\n"
+ "IgnoreOnIsolate=true\n"
+ "After=veritysetup-pre.target systemd-udevd-kernel.socket\n"
+ "Before=blockdev@dev-mapper-%%i.target\n"
+ "Wants=blockdev@dev-mapper-%%i.target\n");
+
+ return 0;
+}
+
+int generator_write_veritysetup_service_section(
+ FILE *f,
+ const char *name,
+ const char *data_what,
+ const char *hash_what,
+ const char *roothash,
+ const char *options) {
+
+ _cleanup_free_ char *name_escaped = NULL, *data_what_escaped = NULL, *hash_what_escaped = NULL,
+ *roothash_escaped = NULL, *options_escaped = NULL;
+
+ assert(f);
+ assert(name);
+ assert(data_what);
+ assert(hash_what);
+
+ name_escaped = specifier_escape(name);
+ if (!name_escaped)
+ return log_oom();
+
+ data_what_escaped = specifier_escape(data_what);
+ if (!data_what_escaped)
+ return log_oom();
+
+ hash_what_escaped = specifier_escape(hash_what);
+ if (!hash_what_escaped)
+ return log_oom();
+
+ roothash_escaped = specifier_escape(roothash);
+ if (!roothash_escaped)
+ return log_oom();
+
+ if (options) {
+ options_escaped = specifier_escape(options);
+ if (!options_escaped)
+ return log_oom();
+ }
+
+ fprintf(f,
+ "\n"
+ "[Service]\n"
+ "Type=oneshot\n"
+ "RemainAfterExit=yes\n"
+ "ExecStart=" SYSTEMD_VERITYSETUP_PATH " attach '%s' '%s' '%s' '%s' '%s'\n"
+ "ExecStop=" SYSTEMD_VERITYSETUP_PATH " detach '%s'\n",
+ name_escaped, data_what_escaped, hash_what_escaped, roothash_escaped, strempty(options_escaped),
+ name_escaped);
+
+ return 0;
+}
+
+void log_setup_generator(void) {
+ if (invoked_by_systemd()) {
+ /* Disable talking to syslog/journal (i.e. the two IPC-based loggers) if we run in system context. */
+ if (cg_pid_get_owner_uid(0, NULL) == -ENXIO /* not running in a per-user slice */)
+ log_set_prohibit_ipc(true);
+
+ /* This effectively means: journal for per-user generators, kmsg otherwise */
+ log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
+ }
+
+ log_parse_environment();
+ (void) log_open();
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-23 12:21:52 +0000