986bd0c7c8
These test use fopen() with append which includes O_CREAT. If these
tests are run in the 'su' SELinux domain (aka through `adb root`) then
they'll create a blank text file when opening /dev/pmsg0 if it does
not exist. Other tests and processes will attempt to write to this
file, either succeeding (for 'su' domain processes) and wasting memory,
or failing due to SELinux and generating audits (for typical
processes).
This isn't a problem for user builds, since without `adb root`, the
tests simply fail when pmsg0 does not exist.
Test: no excess denials or /dev/pmsg0 creation when running
liblog-unit-tests as root
Change-Id: I06e0f308c72db5a53c5f9e4a29bd23f56352c7e2
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/*
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* Copyright (C) 2014 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 <gtest/gtest.h>
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#include <errno.h>
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#include <stdio.h>
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TEST(libc, __pstore_append) {
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#ifdef __ANDROID__
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#ifndef NO_PSTORE
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if (access("/dev/pmsg0", W_OK) != 0) {
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GTEST_SKIP() << "pmsg0 not found, skipping test";
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}
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FILE* fp;
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ASSERT_TRUE(NULL != (fp = fopen("/dev/pmsg0", "ae")));
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static const char message[] = "libc.__pstore_append\n";
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ASSERT_EQ((size_t)1, fwrite(message, sizeof(message), 1, fp));
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int fflushReturn = fflush(fp);
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int fflushErrno = fflushReturn ? errno : 0;
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ASSERT_EQ(0, fflushReturn);
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ASSERT_EQ(0, fflushErrno);
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int fcloseReturn = fclose(fp);
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int fcloseErrno = fcloseReturn ? errno : 0;
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ASSERT_EQ(0, fcloseReturn);
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ASSERT_EQ(0, fcloseErrno);
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if ((fcloseErrno == ENOMEM) || (fflushErrno == ENOMEM)) {
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fprintf(stderr,
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"Kernel does not have space allocated to pmsg pstore driver "
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"configured\n");
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}
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if (!fcloseReturn && !fcloseErrno && !fflushReturn && !fflushReturn) {
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fprintf(stderr,
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"Reboot, ensure string libc.__pstore_append is in "
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"/sys/fs/pstore/pmsg-ramoops-0\n");
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}
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#else /* NO_PSTORE */
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GTEST_LOG_(INFO) << "This test does nothing because of NO_PSTORE.\n";
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#endif /* NO_PSTORE */
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#else
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GTEST_LOG_(INFO) << "This test does nothing.\n";
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#endif
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}
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