1/* 2 * Copyright (C) 2010, 2011 Apple Inc. 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "EnvironmentVariables.h" 28 29#include <crt_externs.h> 30 31namespace WebKit { 32 33EnvironmentVariables::EnvironmentVariables() 34 : m_environmentPointer(*_NSGetEnviron()) 35{ 36} 37 38EnvironmentVariables::~EnvironmentVariables() 39{ 40 size_t size = m_allocatedStrings.size(); 41 for (size_t i = 0; i < size; ++i) 42 fastFree(m_allocatedStrings[i]); 43} 44 45void EnvironmentVariables::set(const char* name, const char* value) 46{ 47 // Check if we need to copy the environment. 48 if (m_environmentPointer == *_NSGetEnviron()) 49 copyEnvironmentVariables(); 50 51 // Allocate a string for the name and value. 52 const char* nameAndValue = createStringForVariable(name, value); 53 54 for (size_t i = 0; i < m_environmentVariables.size() - 1; ++i) { 55 if (valueIfVariableHasName(m_environmentVariables[i], name)) { 56 // Just replace the environment variable. 57 m_environmentVariables[i] = const_cast<char*>(nameAndValue); 58 return; 59 } 60 } 61 62 // Append the new string. 63 ASSERT(!m_environmentVariables.last()); 64 m_environmentVariables.last() = const_cast<char*>(nameAndValue); 65 m_environmentVariables.append(static_cast<char*>(0)); 66 67 m_environmentPointer = m_environmentVariables.data(); 68} 69 70const char* EnvironmentVariables::get(const char* name) const 71{ 72 for (size_t i = 0; m_environmentPointer[i]; ++i) { 73 if (const char* value = valueIfVariableHasName(m_environmentPointer[i], name)) 74 return value; 75 } 76 return 0; 77} 78 79void EnvironmentVariables::appendValue(const char* name, const char* value, char separator) 80{ 81 const char* existingValue = get(name); 82 if (!existingValue) { 83 set(name, value); 84 return; 85 } 86 87 Vector<char, 128> newValue; 88 newValue.append(existingValue, strlen(existingValue)); 89 newValue.append(separator); 90 newValue.append(value, strlen(value) + 1); 91 92 set(name, newValue.data()); 93} 94 95const char* EnvironmentVariables::valueIfVariableHasName(const char* environmentVariable, const char* name) const 96{ 97 // Find the environment variable name. 98 const char* equalsLocation = strchr(environmentVariable, '='); 99 ASSERT(equalsLocation); 100 101 size_t nameLength = equalsLocation - environmentVariable; 102 if (strlen(name) != nameLength) 103 return 0; 104 if (memcmp(environmentVariable, name, nameLength)) 105 return 0; 106 107 return equalsLocation + 1; 108} 109 110const char* EnvironmentVariables::createStringForVariable(const char* name, const char* value) 111{ 112 int nameLength = strlen(name); 113 int valueLength = strlen(value); 114 115 // Allocate enough room to hold 'name=value' and the null character. 116 char* string = static_cast<char*>(fastMalloc(nameLength + 1 + valueLength + 1)); 117 memcpy(string, name, nameLength); 118 string[nameLength] = '='; 119 memcpy(string + nameLength + 1, value, valueLength); 120 string[nameLength + 1 + valueLength] = '\0'; 121 122 m_allocatedStrings.append(string); 123 124 return string; 125} 126 127void EnvironmentVariables::copyEnvironmentVariables() 128{ 129 for (size_t i = 0; (*_NSGetEnviron())[i]; i++) 130 m_environmentVariables.append((*_NSGetEnviron())[i]); 131 132 // Null-terminate the array. 133 m_environmentVariables.append(static_cast<char*>(0)); 134 135 // Update the environment pointer. 136 m_environmentPointer = m_environmentVariables.data(); 137} 138 139const char* EnvironmentVariables::preexistingProcessServiceNameKey() 140{ 141 return "WEBKIT_PREEXISTING_PROCESS_SERVICE_NAME"; 142} 143 144const char* EnvironmentVariables::preexistingProcessTypeKey() 145{ 146 return "WEBKIT_PREEXISTING_PROCESS_TYPE"; 147} 148 149void EnvironmentVariables::dump() 150{ 151 for (size_t i = 0; (*_NSGetEnviron())[i]; i++) 152 printf("%s\n", (*_NSGetEnviron())[i]); 153 154 printf("\n\n\n"); 155} 156 157} // namespace WebKit 158