+ nsec_t n;
+
+ r = sd_bus_message_read(message, "t", &n);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->timer_slack_nsec = n;
+ unit_write_drop_in_private_format(u, mode, name, "TimerSlackNSec=" NSEC_FMT "\n", n);
+ }
+
+ return 1;
+
+ } else if (streq(name, "OOMScoreAdjust")) {
+ int oa;
+
+ r = sd_bus_message_read(message, "i", &oa);
+ if (r < 0)
+ return r;
+
+ if (!oom_score_adjust_is_valid(oa))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "OOM score adjust value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->oom_score_adjust = oa;
+ c->oom_score_adjust_set = true;
+ unit_write_drop_in_private_format(u, mode, name, "OOMScoreAdjust=%i\n", oa);
+ }
+
+ return 1;
+
+ } else if (streq(name, "EnvironmentFiles")) {
+
+ _cleanup_free_ char *joined = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char **l = NULL;
+ size_t size = 0;
+ char **i;
+
+ r = sd_bus_message_enter_container(message, 'a', "(sb)");
+ if (r < 0)
+ return r;
+
+ f = open_memstream(&joined, &size);
+ if (!f)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, c->environment_files)
+ fprintf(f, "EnvironmentFile=%s\n", *i);
+
+ while ((r = sd_bus_message_enter_container(message, 'r', "sb")) > 0) {
+ const char *path;
+ int b;
+
+ r = sd_bus_message_read(message, "sb", &path, &b);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (!isempty(path) && !path_is_absolute(path))
+ return sd_bus_error_set_errnof(error, EINVAL, "Path %s is not absolute.", path);
+
+ if (mode != UNIT_CHECK) {
+ char *buf = NULL;
+
+ buf = strjoin(b ? "-" : "", path, NULL);
+ if (!buf)
+ return -ENOMEM;
+
+ fprintf(f, "EnvironmentFile=%s\n", buf);
+
+ r = strv_consume(&l, buf);
+ if (r < 0)
+ return r;
+ }
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ if (strv_isempty(l)) {
+ c->environment_files = strv_free(c->environment_files);
+ unit_write_drop_in_private(u, mode, name, "EnvironmentFile=\n");
+ } else {
+ r = strv_extend_strv(&c->environment_files, l, true);
+ if (r < 0)
+ return r;
+
+ unit_write_drop_in_private(u, mode, name, joined);
+ }
+ }
+
+ return 1;
+
+ } else if (STR_IN_SET(name, "ReadWriteDirectories", "ReadOnlyDirectories", "InaccessibleDirectories")) {
+
+ _cleanup_strv_free_ char **l = NULL;
+ char ***dirs;
+ char **p;
+
+ r = sd_bus_message_read_strv(message, &l);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(p, l) {
+ int offset;
+ if (!utf8_is_valid(*p))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid %s", name);
+
+ offset = **p == '-';
+ if (!path_is_absolute(*p + offset))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid %s", name);
+ }
+
+ if (mode != UNIT_CHECK) {
+ _cleanup_free_ char *joined = NULL;
+
+ if (streq(name, "ReadWriteDirectories"))
+ dirs = &c->read_write_dirs;
+ else if (streq(name, "ReadOnlyDirectories"))
+ dirs = &c->read_only_dirs;
+ else if (streq(name, "InaccessibleDirectories"))
+ dirs = &c->inaccessible_dirs;
+
+ if (strv_length(l) == 0) {
+ *dirs = strv_free(*dirs);
+ unit_write_drop_in_private_format(u, mode, name, "%s=\n", name);
+ } else {
+ r = strv_extend_strv(dirs, l, true);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ joined = strv_join_quoted(*dirs);
+ if (!joined)
+ return -ENOMEM;
+
+ unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, joined);
+ }
+
+ }
+
+ return 1;
+
+ } else if (streq(name, "ProtectSystem")) {
+ const char *s;
+ ProtectSystem ps;
+
+ r = sd_bus_message_read(message, "s", &s);
+ if (r < 0)
+ return r;
+
+ r = parse_boolean(s);
+ if (r > 0)
+ ps = PROTECT_SYSTEM_YES;
+ else if (r == 0)
+ ps = PROTECT_SYSTEM_NO;
+ else {
+ ps = protect_system_from_string(s);
+ if (ps < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Failed to parse protect system value");
+ }
+
+ if (mode != UNIT_CHECK) {
+ c->protect_system = ps;
+ unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, s);
+ }
+
+ return 1;
+
+ } else if (streq(name, "ProtectHome")) {
+ const char *s;
+ ProtectHome ph;
+
+ r = sd_bus_message_read(message, "s", &s);
+ if (r < 0)
+ return r;
+
+ r = parse_boolean(s);
+ if (r > 0)
+ ph = PROTECT_HOME_YES;
+ else if (r == 0)
+ ph = PROTECT_HOME_NO;
+ else {
+ ph = protect_home_from_string(s);
+ if (ph < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Failed to parse protect home value");
+ }
+
+ if (mode != UNIT_CHECK) {
+ c->protect_home = ph;
+ unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, s);