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0d99eadd77
This is needed for non-volatile register emulation. Also, this can be used to implement system jump or reset flags. BUG=chrome-os-partner:19235 TEST=Run utils test. Check persistent storage file exists. BRANCH=None Change-Id: I699f95718ef6f5de6c3bbb4e37619ee015fb6c4a Signed-off-by: Vic Yang <victoryang@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/50313 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
43 lines
917 B
C
43 lines
917 B
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Persistence module for emulator */
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#define BUF_SIZE 1024
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static void get_storage_path(char *out)
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{
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char buf[BUF_SIZE];
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readlink("/proc/self/exe", buf, BUF_SIZE);
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if (snprintf(out, BUF_SIZE, "%s_persist", buf) >= BUF_SIZE)
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out[BUF_SIZE - 1] = '\0';
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}
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FILE *get_persistent_storage(const char *tag, const char *mode)
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{
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char buf[BUF_SIZE];
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char path[BUF_SIZE];
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/*
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* The persistent storage with tag 'foo' for test 'bar' would
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* be named 'bar_persist_foo'
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*/
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get_storage_path(buf);
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if (snprintf(path, BUF_SIZE, "%s_%s", buf, tag) >= BUF_SIZE)
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path[BUF_SIZE - 1] = '\0';
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return fopen(path, mode);
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}
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void release_persistent_storage(FILE *ps)
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{
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fclose(ps);
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}
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