1 | // |
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2 | // File_UNIX.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/File_UNIX.cpp#15 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Filesystem |
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8 | // Module: File |
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9 | // |
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10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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11 | // and Contributors. |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person or organization |
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14 | // obtaining a copy of the software and accompanying documentation covered by |
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15 | // this license (the "Software") to use, reproduce, display, distribute, |
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16 | // execute, and transmit the Software, and to prepare derivative works of the |
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17 | // Software, and to permit third-parties to whom the Software is furnished to |
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18 | // do so, all subject to the following: |
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19 | // |
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20 | // The copyright notices in the Software and this entire statement, including |
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21 | // the above license grant, this restriction and the following disclaimer, |
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22 | // must be included in all copies of the Software, in whole or in part, and |
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23 | // all derivative works of the Software, unless such copies or derivative |
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24 | // works are solely in the form of machine-executable object code generated by |
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25 | // a source language processor. |
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26 | // |
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27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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33 | // DEALINGS IN THE SOFTWARE. |
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34 | // |
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35 | |
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36 | |
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37 | #include <Poco/File_UNIX.h> |
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38 | #include <Poco/Buffer.h> |
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39 | #include <Poco/Exception.h> |
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40 | #include <algorithm> |
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41 | #include <sys/stat.h> |
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42 | #include <sys/types.h> |
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43 | #include <fcntl.h> |
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44 | #include <errno.h> |
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45 | #include <unistd.h> |
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46 | #include <stdio.h> |
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47 | #include <utime.h> |
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48 | #include <cstring> |
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49 | |
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50 | |
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51 | namespace Poco { |
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52 | |
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53 | |
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54 | FileImpl::FileImpl() |
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55 | { |
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56 | } |
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57 | |
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58 | |
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59 | FileImpl::FileImpl(const std::string& path): _path(path) |
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60 | { |
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61 | std::string::size_type n = _path.size(); |
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62 | if (n > 1 && _path[n - 1] == '/') |
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63 | _path.resize(n - 1); |
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64 | } |
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65 | |
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66 | |
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67 | FileImpl::~FileImpl() |
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68 | { |
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69 | } |
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70 | |
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71 | |
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72 | void FileImpl::swapImpl(FileImpl& file) |
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73 | { |
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74 | std::swap(_path, file._path); |
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75 | } |
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76 | |
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77 | |
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78 | void FileImpl::setPathImpl(const std::string& path) |
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79 | { |
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80 | _path = path; |
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81 | std::string::size_type n = _path.size(); |
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82 | if (n > 1 && _path[n - 1] == '/') |
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83 | _path.resize(n - 1); |
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84 | } |
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85 | |
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86 | |
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87 | bool FileImpl::existsImpl() const |
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88 | { |
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89 | poco_assert (!_path.empty()); |
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90 | |
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91 | struct stat st; |
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92 | return stat(_path.c_str(), &st) == 0; |
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93 | } |
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94 | |
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95 | |
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96 | bool FileImpl::canReadImpl() const |
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97 | { |
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98 | poco_assert (!_path.empty()); |
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99 | |
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100 | struct stat st; |
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101 | if (stat(_path.c_str(), &st) == 0) |
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102 | { |
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103 | if (geteuid() == 0) |
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104 | return true; |
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105 | else if (st.st_uid == geteuid()) |
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106 | return (st.st_mode & S_IRUSR) != 0; |
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107 | else if (st.st_gid == getegid()) |
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108 | return (st.st_mode & S_IRGRP) != 0; |
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109 | else |
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110 | return (st.st_mode & S_IROTH) != 0; |
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111 | } |
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112 | else handleLastErrorImpl(_path); |
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113 | return false; |
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114 | } |
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115 | |
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116 | |
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117 | bool FileImpl::canWriteImpl() const |
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118 | { |
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119 | poco_assert (!_path.empty()); |
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120 | |
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121 | struct stat st; |
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122 | if (stat(_path.c_str(), &st) == 0) |
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123 | { |
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124 | if (geteuid() == 0) |
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125 | return true; |
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126 | else if (st.st_uid == geteuid()) |
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127 | return (st.st_mode & S_IWUSR) != 0; |
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128 | else if (st.st_gid == getegid()) |
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129 | return (st.st_mode & S_IWGRP) != 0; |
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130 | else |
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131 | return (st.st_mode & S_IWOTH) != 0; |
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132 | } |
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133 | else handleLastErrorImpl(_path); |
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134 | return false; |
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135 | } |
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136 | |
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137 | |
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138 | bool FileImpl::canExecuteImpl() const |
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139 | { |
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140 | poco_assert (!_path.empty()); |
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141 | |
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142 | struct stat st; |
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143 | if (stat(_path.c_str(), &st) == 0) |
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144 | { |
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145 | if (st.st_uid == geteuid() || geteuid() == 0) |
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146 | return (st.st_mode & S_IXUSR) != 0; |
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147 | else if (st.st_gid == getegid()) |
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148 | return (st.st_mode & S_IXGRP) != 0; |
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149 | else |
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150 | return (st.st_mode & S_IXOTH) != 0; |
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151 | } |
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152 | else handleLastErrorImpl(_path); |
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153 | return false; |
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154 | } |
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155 | |
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156 | |
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157 | bool FileImpl::isFileImpl() const |
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158 | { |
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159 | poco_assert (!_path.empty()); |
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160 | |
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161 | struct stat st; |
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162 | if (stat(_path.c_str(), &st) == 0) |
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163 | return S_ISREG(st.st_mode); |
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164 | else |
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165 | handleLastErrorImpl(_path); |
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166 | return false; |
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167 | } |
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168 | |
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169 | |
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170 | bool FileImpl::isDirectoryImpl() const |
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171 | { |
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172 | poco_assert (!_path.empty()); |
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173 | |
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174 | struct stat st; |
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175 | if (stat(_path.c_str(), &st) == 0) |
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176 | return S_ISDIR(st.st_mode); |
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177 | else |
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178 | handleLastErrorImpl(_path); |
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179 | return false; |
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180 | } |
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181 | |
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182 | |
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183 | bool FileImpl::isLinkImpl() const |
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184 | { |
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185 | poco_assert (!_path.empty()); |
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186 | |
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187 | struct stat st; |
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188 | if (lstat(_path.c_str(), &st) == 0) |
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189 | return S_ISLNK(st.st_mode); |
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190 | else |
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191 | handleLastErrorImpl(_path); |
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192 | return false; |
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193 | } |
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194 | |
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195 | |
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196 | bool FileImpl::isDeviceImpl() const |
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197 | { |
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198 | poco_assert (!_path.empty()); |
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199 | |
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200 | struct stat st; |
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201 | if (stat(_path.c_str(), &st) == 0) |
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202 | return S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode); |
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203 | else |
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204 | handleLastErrorImpl(_path); |
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205 | return false; |
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206 | } |
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207 | |
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208 | |
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209 | bool FileImpl::isHiddenImpl() const |
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210 | { |
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211 | poco_assert (!_path.empty()); |
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212 | Path p(_path); |
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213 | p.makeFile(); |
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214 | |
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215 | return p.getFileName()[0] == '.'; |
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216 | } |
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217 | |
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218 | |
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219 | Timestamp FileImpl::createdImpl() const |
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220 | { |
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221 | poco_assert (!_path.empty()); |
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222 | |
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223 | #if defined(__APPLE__) && defined(st_birthtime) && !defined(POCO_NO_STAT64) // st_birthtime is available only on 10.5 |
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224 | struct stat64 st; |
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225 | if (stat64(_path.c_str(), &st) == 0) |
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226 | return Timestamp::fromEpochTime(st.st_birthtime); |
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227 | #elif defined(__FreeBSD__) |
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228 | struct stat st; |
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229 | if (stat(_path.c_str(), &st) == 0) |
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230 | return Timestamp::fromEpochTime(st.st_birthtime); |
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231 | #else |
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232 | struct stat st; |
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233 | if (stat(_path.c_str(), &st) == 0) |
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234 | return Timestamp::fromEpochTime(st.st_ctime); |
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235 | #endif |
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236 | else |
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237 | handleLastErrorImpl(_path); |
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238 | return 0; |
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239 | } |
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240 | |
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241 | |
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242 | Timestamp FileImpl::getLastModifiedImpl() const |
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243 | { |
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244 | poco_assert (!_path.empty()); |
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245 | |
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246 | struct stat st; |
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247 | if (stat(_path.c_str(), &st) == 0) |
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248 | return Timestamp::fromEpochTime(st.st_mtime); |
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249 | else |
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250 | handleLastErrorImpl(_path); |
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251 | return 0; |
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252 | } |
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253 | |
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254 | |
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255 | void FileImpl::setLastModifiedImpl(const Timestamp& ts) |
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256 | { |
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257 | poco_assert (!_path.empty()); |
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258 | |
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259 | struct utimbuf tb; |
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260 | tb.actime = ts.epochTime(); |
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261 | tb.modtime = ts.epochTime(); |
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262 | if (utime(_path.c_str(), &tb) != 0) |
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263 | handleLastErrorImpl(_path); |
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264 | } |
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265 | |
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266 | |
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267 | FileImpl::FileSizeImpl FileImpl::getSizeImpl() const |
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268 | { |
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269 | poco_assert (!_path.empty()); |
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270 | |
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271 | struct stat st; |
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272 | if (stat(_path.c_str(), &st) == 0) |
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273 | return st.st_size; |
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274 | else |
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275 | handleLastErrorImpl(_path); |
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276 | return 0; |
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277 | } |
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278 | |
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279 | |
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280 | void FileImpl::setSizeImpl(FileSizeImpl size) |
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281 | { |
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282 | poco_assert (!_path.empty()); |
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283 | |
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284 | if (truncate(_path.c_str(), size) != 0) |
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285 | handleLastErrorImpl(_path); |
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286 | } |
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287 | |
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288 | |
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289 | void FileImpl::setWriteableImpl(bool flag) |
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290 | { |
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291 | poco_assert (!_path.empty()); |
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292 | |
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293 | struct stat st; |
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294 | if (stat(_path.c_str(), &st) != 0) |
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295 | handleLastErrorImpl(_path); |
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296 | mode_t mode; |
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297 | if (flag) |
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298 | { |
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299 | mode = st.st_mode | S_IWUSR; |
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300 | } |
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301 | else |
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302 | { |
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303 | mode_t wmask = S_IWUSR | S_IWGRP | S_IWOTH; |
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304 | mode = st.st_mode & ~wmask; |
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305 | } |
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306 | if (chmod(_path.c_str(), mode) != 0) |
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307 | handleLastErrorImpl(_path); |
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308 | } |
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309 | |
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310 | |
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311 | void FileImpl::setExecutableImpl(bool flag) |
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312 | { |
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313 | poco_assert (!_path.empty()); |
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314 | |
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315 | struct stat st; |
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316 | if (stat(_path.c_str(), &st) != 0) |
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317 | handleLastErrorImpl(_path); |
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318 | mode_t mode; |
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319 | if (flag) |
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320 | { |
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321 | mode = st.st_mode | S_IXUSR; |
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322 | } |
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323 | else |
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324 | { |
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325 | mode_t wmask = S_IXUSR | S_IXGRP | S_IXOTH; |
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326 | mode = st.st_mode & ~wmask; |
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327 | } |
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328 | if (chmod(_path.c_str(), mode) != 0) |
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329 | handleLastErrorImpl(_path); |
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330 | } |
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331 | |
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332 | |
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333 | void FileImpl::copyToImpl(const std::string& path) const |
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334 | { |
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335 | poco_assert (!_path.empty()); |
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336 | |
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337 | int sd = open(_path.c_str(), O_RDONLY); |
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338 | if (sd == -1) handleLastErrorImpl(_path); |
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339 | |
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340 | struct stat st; |
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341 | if (fstat(sd, &st) != 0) |
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342 | { |
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343 | close(sd); |
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344 | handleLastErrorImpl(_path); |
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345 | } |
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346 | const long blockSize = st.st_blksize; |
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347 | |
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348 | int dd = open(path.c_str(), O_CREAT | O_TRUNC | O_WRONLY, st.st_mode & S_IRWXU); |
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349 | if (dd == -1) |
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350 | { |
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351 | close(sd); |
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352 | handleLastErrorImpl(path); |
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353 | } |
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354 | Buffer<char> buffer(blockSize); |
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355 | try |
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356 | { |
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357 | int n; |
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358 | while ((n = read(sd, buffer.begin(), blockSize)) > 0) |
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359 | { |
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360 | if (write(dd, buffer.begin(), n) != n) |
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361 | handleLastErrorImpl(path); |
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362 | } |
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363 | if (n < 0) |
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364 | handleLastErrorImpl(_path); |
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365 | } |
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366 | catch (...) |
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367 | { |
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368 | close(sd); |
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369 | close(dd); |
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370 | throw; |
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371 | } |
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372 | close(sd); |
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373 | if (fsync(dd) != 0) |
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374 | { |
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375 | close(dd); |
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376 | handleLastErrorImpl(path); |
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377 | } |
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378 | if (close(dd) != 0) |
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379 | handleLastErrorImpl(path); |
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380 | } |
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381 | |
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382 | |
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383 | void FileImpl::renameToImpl(const std::string& path) |
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384 | { |
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385 | poco_assert (!_path.empty()); |
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386 | |
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387 | if (rename(_path.c_str(), path.c_str()) != 0) |
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388 | handleLastErrorImpl(_path); |
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389 | } |
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390 | |
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391 | |
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392 | void FileImpl::removeImpl() |
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393 | { |
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394 | poco_assert (!_path.empty()); |
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395 | |
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396 | int rc; |
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397 | if (!isLinkImpl() && isDirectoryImpl()) |
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398 | rc = rmdir(_path.c_str()); |
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399 | else |
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400 | rc = unlink(_path.c_str()); |
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401 | if (rc) handleLastErrorImpl(_path); |
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402 | } |
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403 | |
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404 | |
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405 | bool FileImpl::createFileImpl() |
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406 | { |
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407 | poco_assert (!_path.empty()); |
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408 | |
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409 | int n = open(_path.c_str(), O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR); |
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410 | if (n != -1) |
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411 | { |
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412 | close(n); |
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413 | return true; |
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414 | } |
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415 | if (n == -1 && errno == EEXIST) |
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416 | return false; |
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417 | else |
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418 | handleLastErrorImpl(_path); |
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419 | return false; |
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420 | } |
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421 | |
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422 | |
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423 | bool FileImpl::createDirectoryImpl() |
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424 | { |
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425 | poco_assert (!_path.empty()); |
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426 | |
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427 | if (existsImpl() && isDirectoryImpl()) |
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428 | return false; |
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429 | if (mkdir(_path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) != 0) |
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430 | handleLastErrorImpl(_path); |
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431 | return true; |
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432 | } |
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433 | |
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434 | |
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435 | void FileImpl::handleLastErrorImpl(const std::string& path) |
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436 | { |
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437 | switch (errno) |
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438 | { |
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439 | case EIO: |
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440 | throw IOException(path); |
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441 | case EPERM: |
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442 | throw FileAccessDeniedException("insufficient permissions", path); |
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443 | case EACCES: |
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444 | throw FileAccessDeniedException(path); |
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445 | case ENOENT: |
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446 | throw FileNotFoundException(path); |
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447 | case ENOTDIR: |
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448 | throw OpenFileException("not a directory", path); |
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449 | case EISDIR: |
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450 | throw OpenFileException("not a file", path); |
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451 | case EROFS: |
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452 | throw FileReadOnlyException(path); |
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453 | case EEXIST: |
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454 | throw FileExistsException(path); |
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455 | case ENOSPC: |
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456 | throw FileException("no space left on device", path); |
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457 | case EDQUOT: |
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458 | throw FileException("disk quota exceeded", path); |
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459 | #if !defined(_AIX) |
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460 | case ENOTEMPTY: |
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461 | throw FileException("directory not empty", path); |
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462 | #endif |
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463 | case ENAMETOOLONG: |
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464 | throw PathSyntaxException(path); |
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465 | case ENFILE: |
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466 | case EMFILE: |
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467 | throw FileException("too many open files", path); |
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468 | default: |
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469 | throw FileException(std::strerror(errno), path); |
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470 | } |
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471 | } |
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472 | |
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473 | |
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474 | } // namespace Poco |
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