conf-parser: add config_parse_permille()

src/shared/conf-parser.c

@@ -1203,3 +1203,34 @@ int config_parse_rlimit(
 
         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;
+}

src/shared/conf-parser.h

@@ -140,6 +140,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_log_facility);
 CONFIG_PARSER_PROTOTYPE(config_parse_log_level);
 CONFIG_PARSER_PROTOTYPE(config_parse_signal);
 CONFIG_PARSER_PROTOTYPE(config_parse_personality);
+CONFIG_PARSER_PROTOTYPE(config_parse_permille);
 CONFIG_PARSER_PROTOTYPE(config_parse_ifname);
 CONFIG_PARSER_PROTOTYPE(config_parse_ip_port);
 CONFIG_PARSER_PROTOTYPE(config_parse_join_controllers);