auto_unmount (#93)

Closes #92

* auto_unmount
* opts.idle_timeout_secs = 1

Author: probonopd

src/runtime/runtime.c

@@ -998,6 +998,7 @@ int fusefs_main(int argc, char* argv[], void (* mounted)(void)) {
     sqfs_ll* ll;
     struct fuse_opt fuse_opts[] = {
             {"offset=%zu", offsetof(sqfs_opts, offset), 0},
+            {"auto_unmount", 0},
             {"timeout=%u", offsetof(sqfs_opts, idle_timeout_secs), 0},
             {"fsname=squashfuse", 0},
             {"subtype=squashfuse", 0},
@@ -1030,7 +1031,7 @@ int fusefs_main(int argc, char* argv[], void (* mounted)(void)) {
     opts.image = NULL;
     opts.mountpoint = 0;
     opts.offset = 0;
-    opts.idle_timeout_secs = 0;
+    opts.idle_timeout_secs = 1;
     if (fuse_opt_parse(&args, &opts, fuse_opts, sqfs_opt_proc) == -1)
         sqfs_usage(argv[0], true, true);