+ char *env, *tmp, *ret;
+
+ /*
+ * Allow override of the PuTTY configuration location, and of
+ * specific subparts of it, by means of environment variables.
+ */
+ if (index == INDEX_DIR) {
+ struct passwd *pwd;
+ char *xdg_dir, *old_dir, *old_dir2, *old_dir3, *home, *pwd_home;
+
+ env = getenv("PUTTYDIR");
+ if (env)
+ return dupstr(env);
+
+ home = getenv("HOME");
+ pwd = getpwuid(getuid());
+ if (pwd && pwd->pw_dir) {
+ pwd_home = pwd->pw_dir;
+ } else {
+ pwd_home = NULL;
+ }
+
+ xdg_dir = NULL;
+ env = getenv("XDG_CONFIG_HOME");
+ if (env && *env) {
+ xdg_dir = dupprintf("%s/putty", env);
+ }
+ if (!xdg_dir) {
+ if (home) {
+ tmp = home;
+ } else if (pwd_home) {
+ tmp = pwd_home;
+ } else {
+ tmp = "";
+ }
+ xdg_dir = dupprintf("%s/.config/putty", tmp);
+ }
+ if (xdg_dir && access(xdg_dir, F_OK) == 0) {
+ return xdg_dir;
+ }
+
+ old_dir = old_dir2 = old_dir3 = NULL;
+ if (home) {
+ old_dir = dupprintf("%s/.putty", home);
+ }
+ if (pwd_home) {
+ old_dir2 = dupprintf("%s/.putty", pwd_home);
+ }
+ old_dir3 = dupstr("/.putty");
+
+ if (access(old_dir, F_OK) == 0) {
+ ret = old_dir;
+ goto out;
+ }
+ if (access(old_dir2, F_OK) == 0) {
+ ret = old_dir2;
+ goto out;
+ }
+ if (access(old_dir3, F_OK) == 0) {
+ ret = old_dir3;
+ goto out;
+ }
+#ifdef XDG_DEFAULT
+ if (xdg_dir) {
+ ret = xdg_dir;
+ goto out;
+ }
+#endif
+ ret = old_dir ? old_dir : (old_dir2 ? old_dir2 : old_dir3);
+
+ out:
+ if (ret != old_dir)
+ sfree(old_dir);
+ if (ret != old_dir2)
+ sfree(old_dir2);
+ if (ret != old_dir3)
+ sfree(old_dir3);
+ if (ret != xdg_dir)
+ sfree(xdg_dir);
+ return ret;
+ }
+ if (index == INDEX_SESSIONDIR) {
+ env = getenv("PUTTYSESSIONS");
+ if (env)
+ return dupstr(env);
+ tmp = make_filename(INDEX_DIR, NULL);
+ ret = dupprintf("%s/sessions", tmp);
+ sfree(tmp);
+ return ret;
+ }