1 | // |
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2 | // Path_UNIX.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/Path_UNIX.cpp#2 $ |
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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: Path |
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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/Path_UNIX.h> |
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38 | #include <Poco/Exception.h> |
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39 | #include <Poco/Environment_UNIX.h> |
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40 | #include <unistd.h> |
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41 | #include <stdlib.h> |
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42 | #include <sys/types.h> |
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43 | #include <pwd.h> |
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44 | #include <cctype> |
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45 | #include <climits> |
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46 | |
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47 | |
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48 | #ifndef PATH_MAX |
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49 | #define PATH_MAX 1024 // fallback |
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50 | #endif |
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51 | |
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52 | |
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53 | namespace Poco { |
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54 | |
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55 | |
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56 | std::string PathImpl::currentImpl() |
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57 | { |
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58 | std::string path; |
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59 | char cwd[PATH_MAX]; |
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60 | if (getcwd(cwd, sizeof(cwd))) |
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61 | path = cwd; |
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62 | else |
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63 | throw SystemException("cannot get current directory"); |
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64 | std::string::size_type n = path.size(); |
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65 | if (n > 0 && path[n - 1] != '/') path.append("/"); |
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66 | return path; |
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67 | } |
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68 | |
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69 | |
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70 | std::string PathImpl::homeImpl() |
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71 | { |
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72 | std::string path; |
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73 | struct passwd* pwd = getpwuid(getuid()); |
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74 | if (pwd) |
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75 | path = pwd->pw_dir; |
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76 | else |
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77 | { |
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78 | pwd = getpwuid(geteuid()); |
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79 | if (pwd) |
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80 | path = pwd->pw_dir; |
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81 | else |
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82 | path = EnvironmentImpl::getImpl("HOME"); |
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83 | } |
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84 | std::string::size_type n = path.size(); |
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85 | if (n > 0 && path[n - 1] != '/') path.append("/"); |
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86 | return path; |
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87 | } |
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88 | |
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89 | |
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90 | std::string PathImpl::tempImpl() |
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91 | { |
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92 | std::string path; |
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93 | char* tmp = getenv("TMPDIR"); |
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94 | if (tmp) |
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95 | { |
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96 | path = tmp; |
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97 | std::string::size_type n = path.size(); |
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98 | if (n > 0 && path[n - 1] != '/') path.append("/"); |
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99 | } |
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100 | else |
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101 | { |
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102 | path = "/tmp/"; |
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103 | } |
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104 | return path; |
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105 | } |
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106 | |
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107 | |
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108 | std::string PathImpl::nullImpl() |
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109 | { |
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110 | return "/dev/null"; |
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111 | } |
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112 | |
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113 | |
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114 | std::string PathImpl::expandImpl(const std::string& path) |
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115 | { |
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116 | std::string result; |
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117 | std::string::const_iterator it = path.begin(); |
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118 | std::string::const_iterator end = path.end(); |
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119 | if (it != end && *it == '~') |
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120 | { |
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121 | ++it; |
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122 | if (it != end && *it == '/') |
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123 | { |
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124 | result += homeImpl(); ++it; |
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125 | } |
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126 | else result += '~'; |
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127 | } |
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128 | while (it != end) |
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129 | { |
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130 | if (*it == '$') |
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131 | { |
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132 | std::string var; |
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133 | ++it; |
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134 | if (it != end && *it == '{') |
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135 | { |
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136 | ++it; |
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137 | while (it != end && *it != '}') var += *it++; |
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138 | if (it != end) ++it; |
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139 | } |
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140 | else |
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141 | { |
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142 | while (it != end && (std::isalnum(*it) || *it == '_')) var += *it++; |
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143 | } |
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144 | char* val = getenv(var.c_str()); |
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145 | if (val) result += val; |
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146 | } |
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147 | else result += *it++; |
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148 | } |
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149 | return result; |
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150 | } |
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151 | |
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152 | |
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153 | void PathImpl::listRootsImpl(std::vector<std::string>& roots) |
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154 | { |
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155 | roots.clear(); |
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156 | roots.push_back("/"); |
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157 | } |
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158 | |
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159 | |
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160 | } // namespace Poco |
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