81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/*
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* Copyright (C) 2007 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 <sys/stat.h>
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#include "roots.h"
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#include "common.h"
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#define CANARY_FILE "/system/build.prop"
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#define CANARY_FILE_ROOT_PATH "SYSTEM:build.prop"
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int
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file_exists(const char *path)
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{
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struct stat st;
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int ret;
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ret = stat(path, &st);
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if (ret == 0) {
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return S_ISREG(st.st_mode);
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}
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return 0;
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}
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int
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test_roots()
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{
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int ret;
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/* Make sure that /system isn't mounted yet.
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*/
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if (file_exists(CANARY_FILE)) return -__LINE__;
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if (is_root_path_mounted(CANARY_FILE_ROOT_PATH)) return -__LINE__;
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/* Try to mount the root.
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*/
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ret = ensure_root_path_mounted(CANARY_FILE_ROOT_PATH);
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if (ret < 0) return -__LINE__;
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/* Make sure we can see the file now and that we know the root is mounted.
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*/
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if (!file_exists(CANARY_FILE)) return -__LINE__;
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if (!is_root_path_mounted(CANARY_FILE_ROOT_PATH)) return -__LINE__;
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/* Make sure that the root path corresponds to the regular path.
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*/
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struct stat st1, st2;
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char buf[128];
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const char *path = translate_root_path(CANARY_FILE_ROOT_PATH,
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buf, sizeof(buf));
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if (path == NULL) return -__LINE__;
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ret = stat(CANARY_FILE, &st1);
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if (ret != 0) return -__LINE__;
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ret = stat(path, &st2);
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if (ret != 0) return -__LINE__;
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if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino) return -__LINE__;
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/* Try to unmount the root.
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*/
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ret = ensure_root_path_unmounted(CANARY_FILE_ROOT_PATH);
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if (ret < 0) return -__LINE__;
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/* Make sure that we can't see the file anymore and that
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* we don't think the root is mounted.
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*/
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if (file_exists(CANARY_FILE)) return -__LINE__;
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if (is_root_path_mounted(CANARY_FILE_ROOT_PATH)) return -__LINE__;
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return 0;
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}
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