+
+int config_parse_join_controllers(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ char ****ret = data;
+ const char *whole_rvalue = rvalue;
+ unsigned n = 0;
+ _cleanup_(strv_free_freep) char ***controllers = NULL;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(ret);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ char **l;
+ int r;
+
+ r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
+ return r;
+ }
+ if (r == 0)
+ break;
+
+ l = strv_split(word, ",");
+ if (!l)
+ return log_oom();
+ strv_uniq(l);
+
+ if (strv_length(l) <= 1) {
+ strv_free(l);
+ continue;
+ }
+
+ if (!controllers) {
+ controllers = new(char**, 2);
+ if (!controllers) {
+ strv_free(l);
+ return log_oom();
+ }
+
+ controllers[0] = l;
+ controllers[1] = NULL;
+
+ n = 1;
+ } else {
+ char ***a;
+ char ***t;
+
+ t = new0(char**, n+2);
+ if (!t) {
+ strv_free(l);
+ return log_oom();
+ }
+
+ n = 0;
+
+ for (a = controllers; *a; a++)
+ if (strv_overlap(*a, l)) {
+ if (strv_extend_strv(&l, *a, false) < 0) {
+ strv_free(l);
+ strv_free_free(t);
+ return log_oom();
+ }
+
+ } else {
+ char **c;
+
+ c = strv_copy(*a);
+ if (!c) {
+ strv_free(l);
+ strv_free_free(t);
+ return log_oom();
+ }
+
+ t[n++] = c;
+ }
+
+ t[n++] = strv_uniq(l);
+
+ strv_free_free(controllers);
+ controllers = t;
+ }
+ }
+ if (!isempty(rvalue))
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
+
+ /* As a special case, return a single empty strv, to override the default */
+ if (!controllers) {
+ controllers = new(char**, 2);
+ if (!controllers)
+ return log_oom();
+ controllers[0] = strv_new(NULL, NULL);
+ if (!controllers[0])
+ return log_oom();
+ controllers[1] = NULL;
+ }
+
+ strv_free_free(*ret);
+ *ret = TAKE_PTR(controllers);
+
+ return 0;
+}
+
+int config_parse_mtu(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ uint32_t *mtu = data;
+ int r;
+
+ assert(rvalue);
+ assert(mtu);
+
+ r = parse_mtu(ltype, rvalue, mtu);
+ if (r == -ERANGE) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
+ (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
+ rvalue);
+ return 0;
+ }
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse MTU value '%s', ignoring: %m", rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_rlimit(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ struct rlimit **rl = data, d = {};
+ int r;
+
+ assert(rvalue);
+ assert(rl);
+
+ r = rlimit_parse(ltype, rvalue, &d);
+ if (r == -EILSEQ) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
+ return 0;
+ }
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (rl[ltype])
+ *rl[ltype] = d;
+ else {
+ rl[ltype] = newdup(struct rlimit, &d, 1);
+ if (!rl[ltype])
+ return log_oom();
+ }
+
+ return 0;
+}
+
+int config_parse_permille(const char* unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ unsigned *permille = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(permille);
+
+ r = parse_permille(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse permille value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *permille = (unsigned) r;
+
+ return 0;
+}