1 // Copyright (c) 2011, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // safe_readlink_unittest.cc: Unit tests for google_breakpad::SafeReadLink. 31 32 #include "breakpad_googletest_includes.h" 33 #include "common/linux/safe_readlink.h" 34 35 using google_breakpad::SafeReadLink; 36 37 TEST(SafeReadLinkTest, ZeroBufferSize) { 38 char buffer[1]; 39 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 0)); 40 } 41 42 TEST(SafeReadLinkTest, BufferSizeTooSmall) { 43 char buffer[1]; 44 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, 1)); 45 } 46 47 TEST(SafeReadLinkTest, BoundaryBufferSize) { 48 char buffer[PATH_MAX]; 49 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer, sizeof(buffer))); 50 size_t path_length = strlen(buffer); 51 EXPECT_LT(0U, path_length); 52 EXPECT_GT(sizeof(buffer), path_length); 53 54 // Buffer size equals to the expected path length plus 1 for the NULL byte. 55 char buffer2[PATH_MAX]; 56 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2, path_length + 1)); 57 EXPECT_EQ(path_length, strlen(buffer2)); 58 EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); 59 60 // Buffer size equals to the expected path length. 61 EXPECT_FALSE(SafeReadLink("/proc/self/exe", buffer, path_length)); 62 } 63 64 TEST(SafeReadLinkTest, NonexistentPath) { 65 char buffer[PATH_MAX]; 66 EXPECT_FALSE(SafeReadLink("nonexistent_path", buffer, sizeof(buffer))); 67 } 68 69 TEST(SafeReadLinkTest, NonSymbolicLinkPath) { 70 char actual_path[PATH_MAX]; 71 EXPECT_TRUE(SafeReadLink("/proc/self/exe", actual_path, sizeof(actual_path))); 72 73 char buffer[PATH_MAX]; 74 EXPECT_FALSE(SafeReadLink(actual_path, buffer, sizeof(buffer))); 75 } 76 77 TEST(SafeReadLinkTest, DeduceBufferSizeFromCharArray) { 78 char buffer[PATH_MAX]; 79 char* buffer_pointer = buffer; 80 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer_pointer, sizeof(buffer))); 81 size_t path_length = strlen(buffer); 82 83 // Use the template version of SafeReadLink to deduce the buffer size 84 // from the char array. 85 char buffer2[PATH_MAX]; 86 EXPECT_TRUE(SafeReadLink("/proc/self/exe", buffer2)); 87 EXPECT_EQ(path_length, strlen(buffer2)); 88 EXPECT_EQ(0, strncmp(buffer, buffer2, PATH_MAX)); 89 } 90
