+
+int config_parse_tmpfs_size(
+ 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) {
+
+ size_t *sz = data;
+ const char *e;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ e = endswith(rvalue, "%");
+ if (e) {
+ unsigned long ul;
+ char *f;
+
+ errno = 0;
+ ul = strtoul(rvalue, &f, 10);
+ if (errno != 0 || f != e) {
+ log_syntax(unit, LOG_ERR, filename, line, errno ? errno : EINVAL, "Failed to parse percentage value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (ul <= 0 || ul >= 100) {
+ log_syntax(unit, LOG_ERR, filename, line, errno ? errno : EINVAL, "Percentage value out of range, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) ((physical_memory() * (uint64_t) ul) / (uint64_t) 100));
+ } else {
+ off_t o;
+
+ r = parse_size(rvalue, 1024, &o);
+ if (r < 0 || (off_t) (size_t) o != o) {
+ log_syntax(unit, LOG_ERR, filename, line, r < 0 ? -r : ERANGE, "Failed to parse size value, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ *sz = PAGE_ALIGN((size_t) o);
+ }
+
+ return 0;
+}