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      1 /*
      2  * Copyright (C) 2015 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 "android-base/logging.h"
     18 #include "android-base/test_utils.h"
     19 #include "utils/Compat.h" // For OS_PATH_SEPARATOR.
     20 
     21 #include <fcntl.h>
     22 #include <stdio.h>
     23 #include <stdlib.h>
     24 #include <sys/stat.h>
     25 #include <unistd.h>
     26 
     27 #if defined(_WIN32)
     28 #include <windows.h>
     29 #include <direct.h>
     30 #endif
     31 
     32 #include <string>
     33 
     34 #ifdef _WIN32
     35 int mkstemp(char* template_name) {
     36   if (_mktemp(template_name) == nullptr) {
     37     return -1;
     38   }
     39   // Use open() to match the close() that TemporaryFile's destructor does.
     40   // Use O_BINARY to match base file APIs.
     41   return open(template_name, O_CREAT | O_EXCL | O_RDWR | O_BINARY,
     42               S_IRUSR | S_IWUSR);
     43 }
     44 
     45 char* mkdtemp(char* template_name) {
     46   if (_mktemp(template_name) == nullptr) {
     47     return nullptr;
     48   }
     49   if (_mkdir(template_name) == -1) {
     50     return nullptr;
     51   }
     52   return template_name;
     53 }
     54 #endif
     55 
     56 static std::string GetSystemTempDir() {
     57 #if defined(__ANDROID__)
     58   return "/data/local/tmp";
     59 #elif defined(_WIN32)
     60   char tmp_dir[MAX_PATH];
     61   DWORD result = GetTempPathA(sizeof(tmp_dir), tmp_dir);
     62   CHECK_NE(result, 0ul) << "GetTempPathA failed, error: " << GetLastError();
     63   CHECK_LT(result, sizeof(tmp_dir)) << "path truncated to: " << result;
     64 
     65   // GetTempPath() returns a path with a trailing slash, but init()
     66   // does not expect that, so remove it.
     67   CHECK_EQ(tmp_dir[result - 1], '\\');
     68   tmp_dir[result - 1] = '\0';
     69   return tmp_dir;
     70 #else
     71   return "/tmp";
     72 #endif
     73 }
     74 
     75 TemporaryFile::TemporaryFile() {
     76   init(GetSystemTempDir());
     77 }
     78 
     79 TemporaryFile::~TemporaryFile() {
     80   close(fd);
     81   unlink(path);
     82 }
     83 
     84 void TemporaryFile::init(const std::string& tmp_dir) {
     85   snprintf(path, sizeof(path), "%s%cTemporaryFile-XXXXXX", tmp_dir.c_str(),
     86            OS_PATH_SEPARATOR);
     87   fd = mkstemp(path);
     88 }
     89 
     90 TemporaryDir::TemporaryDir() {
     91   init(GetSystemTempDir());
     92 }
     93 
     94 TemporaryDir::~TemporaryDir() {
     95   rmdir(path);
     96 }
     97 
     98 bool TemporaryDir::init(const std::string& tmp_dir) {
     99   snprintf(path, sizeof(path), "%s%cTemporaryDir-XXXXXX", tmp_dir.c_str(),
    100            OS_PATH_SEPARATOR);
    101   return (mkdtemp(path) != nullptr);
    102 }
    103