1 files changed, 42 insertions, 0 deletions
diff --git a/chip/host/persistence.c b/chip/host/persistence.c
new file mode 100644
index 0000000000..bf3ce01788
--- /dev/null
+++ b/chip/host/persistence.c
@@ -0,0 +1,42 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Persistence module for emulator */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+
+#define BUF_SIZE 1024
+
+static void get_storage_path(char *out)
+{
+	char buf[BUF_SIZE];
+
+	readlink("/proc/self/exe", buf, BUF_SIZE);
+	if (snprintf(out, BUF_SIZE, "%s_persist", buf) >= BUF_SIZE)
+		out[BUF_SIZE - 1] = '\0';
+}
+
+FILE *get_persistent_storage(const char *tag, const char *mode)
+{
+	char buf[BUF_SIZE];
+	char path[BUF_SIZE];
+
+	/*
+	 * The persistent storage with tag 'foo' for test 'bar' would
+	 * be named 'bar_persist_foo'
+	 */
+	get_storage_path(buf);
+	if (snprintf(path, BUF_SIZE, "%s_%s", buf, tag) >= BUF_SIZE)
+		path[BUF_SIZE - 1] = '\0';
+
+	return fopen(path, mode);
+}
+
+void release_persistent_storage(FILE *ps)
+{
+	fclose(ps);
+}