1 | /* |
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2 | * Copyright (c) 2011-2014, Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Permission to use, copy, modify, and/or distribute this software for any |
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5 | * purpose with or without fee is hereby granted, provided that the above |
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6 | * copyright notice and this permission notice appear in all copies. |
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7 | * |
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8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <errno.h> |
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22 | #include <string.h> |
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23 | #include <sys/stat.h> |
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24 | #include <unistd.h> |
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25 | |
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26 | #include <rld.h> |
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27 | |
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28 | namespace rld |
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29 | { |
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30 | namespace path |
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31 | { |
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32 | const std::string |
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33 | basename (const std::string& name) |
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34 | { |
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35 | size_t b = name.find_last_of (RLD_PATH_SEPARATOR); |
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36 | if (b != std::string::npos) |
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37 | return name.substr (b + 1); |
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38 | return name; |
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39 | } |
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40 | |
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41 | const std::string |
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42 | dirname (const std::string& name) |
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43 | { |
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44 | size_t b = name.find_last_of (RLD_PATH_SEPARATOR); |
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45 | if (b != std::string::npos) |
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46 | return name.substr (0, b); |
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47 | return name; |
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48 | } |
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49 | |
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50 | const std::string |
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51 | extension (const std::string& name) |
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52 | { |
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53 | size_t b = name.find_last_of ('.'); |
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54 | if (b != std::string::npos) |
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55 | return name.substr (b); |
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56 | return name; |
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57 | } |
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58 | |
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59 | void |
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60 | path_split (const std::string& path, paths& paths) |
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61 | { |
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62 | strings ps; |
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63 | rld::split (ps, path, RLD_PATHSTR_SEPARATOR); |
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64 | if (ps.size ()) |
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65 | { |
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66 | for (strings::iterator psi = ps.begin (); |
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67 | psi != ps.end (); |
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68 | ++psi) |
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69 | { |
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70 | if (check_directory (*psi)) |
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71 | paths.push_back (*psi); |
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72 | } |
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73 | } |
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74 | } |
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75 | |
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76 | void |
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77 | path_join (const std::string& base, const std::string& part, std::string& joined) |
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78 | { |
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79 | if ((base[base.size () - 1] != RLD_PATH_SEPARATOR) && |
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80 | (part[0] != RLD_PATH_SEPARATOR)) |
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81 | joined = base + RLD_PATH_SEPARATOR + part; |
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82 | else if ((base[base.size () - 1] == RLD_PATH_SEPARATOR) && |
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83 | (part[0] == RLD_PATH_SEPARATOR)) |
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84 | joined = base + &part[1]; |
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85 | else |
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86 | joined = base + part; |
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87 | } |
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88 | |
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89 | void |
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90 | path_join (const std::string& base, const paths& parts, std::string& joined) |
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91 | { |
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92 | joined = base; |
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93 | for (paths::const_iterator pi = parts.begin (); |
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94 | pi != parts.end (); |
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95 | ++pi) |
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96 | { |
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97 | path_join (joined, *pi, joined); |
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98 | } |
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99 | } |
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100 | |
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101 | const std::string |
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102 | path_abs (const std::string& path) |
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103 | { |
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104 | std::string apath; |
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105 | |
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106 | if (path[0] == RLD_PATH_SEPARATOR) |
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107 | { |
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108 | apath = path; |
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109 | } |
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110 | else |
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111 | { |
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112 | char* buf = 0; |
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113 | try |
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114 | { |
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115 | buf = new char[32 * 1024]; |
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116 | if (!::getcwd (buf, 32 * 1024)) |
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117 | { |
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118 | delete [] buf; |
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119 | throw rld::error (::strerror (errno), "get current working directory"); |
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120 | } |
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121 | path_join (buf, path, apath); |
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122 | delete [] buf; |
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123 | } |
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124 | catch (...) |
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125 | { |
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126 | delete [] buf; |
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127 | throw; |
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128 | } |
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129 | } |
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130 | |
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131 | strings ps; |
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132 | strings aps; |
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133 | |
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134 | rld::split (ps, apath, RLD_PATH_SEPARATOR); |
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135 | |
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136 | for (strings::iterator psi = ps.begin (); |
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137 | psi != ps.end (); |
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138 | ++psi) |
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139 | { |
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140 | const std::string& dir = *psi; |
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141 | |
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142 | if (dir.empty () || dir == ".") |
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143 | { |
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144 | /* do nothing */ |
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145 | } |
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146 | else if (dir == "..") |
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147 | { |
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148 | aps.pop_back (); |
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149 | } |
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150 | else |
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151 | { |
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152 | aps.push_back (dir); |
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153 | } |
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154 | } |
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155 | |
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156 | return RLD_PATH_SEPARATOR + rld::join (aps, RLD_PATH_SEPARATOR_STR); |
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157 | } |
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158 | |
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159 | bool |
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160 | check_file (const std::string& path) |
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161 | { |
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162 | struct stat sb; |
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163 | if (::stat (path.c_str (), &sb) == 0) |
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164 | if (S_ISREG (sb.st_mode)) |
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165 | return true; |
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166 | return false; |
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167 | } |
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168 | |
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169 | bool |
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170 | check_directory (const std::string& path) |
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171 | { |
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172 | struct stat sb; |
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173 | if (::stat (path.c_str (), &sb) == 0) |
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174 | if (S_ISDIR (sb.st_mode)) |
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175 | return true; |
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176 | return false; |
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177 | } |
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178 | |
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179 | void |
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180 | find_file (std::string& path, const std::string& name, paths& search_paths) |
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181 | { |
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182 | for (paths::iterator pi = search_paths.begin (); |
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183 | pi != search_paths.end (); |
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184 | ++pi) |
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185 | { |
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186 | path_join (*pi, name, path); |
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187 | if (check_file (path)) |
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188 | return; |
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189 | } |
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190 | path.clear (); |
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191 | } |
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192 | |
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193 | void |
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194 | unlink (const std::string& path, bool not_present_error) |
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195 | { |
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196 | struct stat sb; |
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197 | if (::stat (path.c_str (), &sb) >= 0) |
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198 | { |
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199 | if (!S_ISREG (sb.st_mode)) |
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200 | throw rld::error ("Not a regular file", "unlinking: " + path); |
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201 | |
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202 | int r; |
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203 | #if _WIN32 |
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204 | r = ::remove(path.c_str ()); |
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205 | #else |
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206 | r = ::unlink (path.c_str ()); |
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207 | #endif |
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208 | if (r < 0) |
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209 | throw rld::error (::strerror (errno), "unlinking: " + path); |
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210 | } |
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211 | else |
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212 | { |
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213 | if (not_present_error) |
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214 | throw rld::error ("Not found", "unlinking: " + path); |
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215 | } |
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216 | } |
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217 | |
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218 | void |
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219 | get_system_path (paths& paths) |
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220 | { |
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221 | const char* path = ::getenv ("PATH"); |
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222 | strings ps; |
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223 | rld::split (ps, path, RLD_PATHSTR_SEPARATOR); |
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224 | if (ps.size ()) |
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225 | { |
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226 | for (strings::iterator psi = ps.begin (); |
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227 | psi != ps.end (); |
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228 | ++psi) |
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229 | { |
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230 | if (check_directory (*psi)) |
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231 | paths.push_back (*psi); |
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232 | } |
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233 | } |
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234 | } |
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235 | } |
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236 | } |
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