1c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// Copyright (c) 2011, Google Inc. 2c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// All rights reserved. 3c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// 4c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// Redistribution and use in source and binary forms, with or without 5c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// modification, are permitted provided that the following conditions are 6c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// met: 7c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// 8c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// * Redistributions of source code must retain the above copyright 9c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// notice, this list of conditions and the following disclaimer. 10c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// * Redistributions in binary form must reproduce the above 11c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// copyright notice, this list of conditions and the following disclaimer 12c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// in the documentation and/or other materials provided with the 13c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// distribution. 14c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// * Neither the name of Google Inc. nor the names of its 15c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// contributors may be used to endorse or promote products derived from 16c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// this software without specific prior written permission. 17c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// 18c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 30c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org// safe_readlink_unittest.cc: Unit tests for google_breakpad::SafeReadLink. 31c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 32c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org#include "breakpad_googletest_includes.h" 33c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org#include "common/linux/safe_readlink.h" 34c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 35c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgusing google_breakpad::SafeReadLink; 36c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 37c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, ZeroBufferSize) { 38c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[1]; 39c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 0)); 40c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 41c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 42c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, BufferSizeTooSmall) { 43c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[1]; 44c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 1)); 45c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 46c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 47c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, BoundaryBufferSize) { 48c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[PATH_MAX]; 49c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer, sizeof(buffer))); 50c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org size_t path_length = strlen(buffer); 512971a050754f48aaa807db47a29e0d0beddbdcf7ivan.penkov@gmail.com EXPECT_LT(0U, path_length); 52c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_GT(sizeof(buffer), path_length); 53c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 54c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org // Buffer size equals to the expected path length plus 1 for the NULL byte. 55c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer2[PATH_MAX]; 56c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2, path_length + 1)); 57c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_EQ(path_length, strlen(buffer2)); 58c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); 59c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 60c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org // Buffer size equals to the expected path length. 61c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, path_length)); 62c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 63c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 64c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, NonexistentPath) { 65c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[PATH_MAX]; 66c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_FALSE(SafeReadLink("nonexistent_path", buffer, sizeof(buffer))); 67c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 68c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 69c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, NonSymbolicLinkPath) { 70c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char actual_path[PATH_MAX]; 71c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_TRUE(SafeReadLink("/proc/self/exe", actual_path, sizeof(actual_path))); 72c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 73c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[PATH_MAX]; 74c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_FALSE(SafeReadLink(actual_path, buffer, sizeof(buffer))); 75c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 76c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 77c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.orgTEST(SafeReadLinkTest, DeduceBufferSizeFromCharArray) { 78c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer[PATH_MAX]; 79c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char* buffer_pointer = buffer; 80c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer_pointer, sizeof(buffer))); 81c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org size_t path_length = strlen(buffer); 82c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org 83c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org // Use the template version of SafeReadLink to deduce the buffer size 84c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org // from the char array. 85c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org char buffer2[PATH_MAX]; 86c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2)); 87c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_EQ(path_length, strlen(buffer2)); 88c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); 89c9fb1f6e7400b2f7198e62e09d7ac0a2aa68c84cbenchan@chromium.org} 90