+static void show_unit_help(UnitStatusInfo *i) {
+ char **p;
+
+ assert(i);
+
+ if (!i->documentation) {
+ log_info("Documentation for %s not known.", i->id);
+ return;
+ }
+
+ STRV_FOREACH(p, i->documentation) {
+
+ if (startswith(*p, "man:")) {
+ size_t k;
+ char *e = NULL;
+ char *page = NULL, *section = NULL;
+ const char *args[4] = { "man", NULL, NULL, NULL };
+ pid_t pid;
+
+ k = strlen(*p);
+
+ if ((*p)[k-1] == ')')
+ e = strrchr(*p, '(');
+
+ if (e) {
+ page = strndup((*p) + 4, e - *p - 4);
+ if (!page) {
+ log_error("Out of memory.");
+ return;
+ }
+
+ section = strndup(e + 1, *p + k - e - 2);
+ if (!section) {
+ free(page);
+ log_error("Out of memory");
+ return;
+ }
+
+ args[1] = section;
+ args[2] = page;
+ } else
+ args[1] = *p + 4;
+
+ pid = fork();
+ if (pid < 0) {
+ log_error("Failed to fork: %m");
+ free(page);
+ free(section);
+ continue;
+ }
+
+ if (pid == 0) {
+ /* Child */
+ execvp(args[0], (char**) args);
+ log_error("Failed to execute man: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ free(page);
+ free(section);
+
+ wait_for_terminate(pid, NULL);
+ } else
+ log_info("Can't show %s.", *p);
+ }
+}
+