1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "os.h" 18 19 #include <sys/types.h> 20 #include <sys/stat.h> 21 #include <fcntl.h> 22 #include <cstddef> 23 #include <memory> 24 25 #include "base/logging.h" 26 #include "base/unix_file/fd_file.h" 27 28 namespace art { 29 OpenFileForReading(const char * name)30 File* OS::OpenFileForReading(const char* name) { 31 return OpenFileWithFlags(name, O_RDONLY); 32 } 33 OpenFileReadWrite(const char * name)34 File* OS::OpenFileReadWrite(const char* name) { 35 return OpenFileWithFlags(name, O_RDWR); 36 } 37 CreateEmptyFile(const char * name)38 File* OS::CreateEmptyFile(const char* name) { 39 return OpenFileWithFlags(name, O_RDWR | O_CREAT | O_TRUNC); 40 } 41 OpenFileWithFlags(const char * name,int flags)42 File* OS::OpenFileWithFlags(const char* name, int flags) { 43 CHECK(name != NULL); 44 std::unique_ptr<File> file(new File); 45 if (!file->Open(name, flags, 0666)) { 46 return NULL; 47 } 48 return file.release(); 49 } 50 FileExists(const char * name)51 bool OS::FileExists(const char* name) { 52 struct stat st; 53 if (stat(name, &st) == 0) { 54 return S_ISREG(st.st_mode); // TODO: Deal with symlinks? 55 } else { 56 return false; 57 } 58 } 59 DirectoryExists(const char * name)60 bool OS::DirectoryExists(const char* name) { 61 struct stat st; 62 if (stat(name, &st) == 0) { 63 return S_ISDIR(st.st_mode); // TODO: Deal with symlinks? 64 } else { 65 return false; 66 } 67 } 68 69 } // namespace art 70