83 lines
2 KiB
C++
83 lines
2 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#define LOG_TAG "Vold"
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#include <cutils/log.h>
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#include "Xwarp.h"
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const char *Xwarp::XWARP_BACKINGFILE = "/mnt/secure/asec/xwarp.img";
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const char *Xwarp::XWARP_CFG = "/sys/fs/yaffs/mtd3/xwarp-backing-store";
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const char *Xwarp::XWARP_READY = "/sys/fs/yaffs/mtd3/xwarp-ready";
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const char *Xwarp::XWARP_MIRROR_STATUS = "/sys/fs/yaffs/mtd3/xwarp-mirror";
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int Xwarp::enable() {
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return doEnableDisable(true);
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}
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int Xwarp::disable() {
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return doEnableDisable(false);
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}
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int Xwarp::status(bool *ready, unsigned *mirrorPos, unsigned *maxSize) {
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FILE *fp;
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*ready = false;
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*mirrorPos = 0;
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*maxSize = 0;
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if (!(fp = fopen(XWARP_READY, "r"))) {
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return -1;
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}
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fscanf(fp, "%d", (int *) ready);
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fclose(fp);
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if (!(fp = fopen(XWARP_MIRROR_STATUS, "r"))) {
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return -1;
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}
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fscanf(fp, "%u %u", mirrorPos, maxSize);
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fclose(fp);
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return 0;
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}
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int Xwarp::doEnableDisable(bool enable) {
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const char *tmp;
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int fd = open(XWARP_CFG, O_WRONLY);
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if (fd < 0)
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return -1;
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tmp = (enable ? XWARP_BACKINGFILE : "");
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if (write(fd, tmp, strlen(tmp)+1) < 0) {
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LOGE("Failed to write xwarp cfg (%s)", strerror(errno));
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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