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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
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4 2007 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cerrno> |
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29 #include <cstdio> |
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30 #include <cstdlib> |
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31 #include <cstring> |
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32 |
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33 #include <iostream> |
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34 #include <vector> |
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35 |
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36 #ifdef HAVE_SYS_TYPES_H |
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37 #include <sys/types.h> |
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38 #endif |
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39 |
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40 #ifdef HAVE_UNISTD_H |
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41 #include <unistd.h> |
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42 #endif |
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43 |
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44 #include "dir-ops.h" |
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45 #include "file-ops.h" |
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46 #include "file-stat.h" |
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47 #include "oct-env.h" |
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48 #include "oct-passwd.h" |
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49 #include "pathlen.h" |
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50 #include "quit.h" |
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51 #include "statdefs.h" |
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52 #include "str-vec.h" |
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53 |
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54 #define NOT_SUPPORTED(nm) \ |
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55 nm ": not supported on this system" |
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56 |
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57 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) \ |
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58 && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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59 char file_ops::dir_sep_char = '\\'; |
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60 std::string file_ops::dir_sep_str ("\\"); |
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61 #else |
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62 char file_ops::dir_sep_char = '/'; |
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63 std::string file_ops::dir_sep_str ("/"); |
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64 #endif |
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65 |
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66 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) |
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67 std::string file_ops::dir_sep_chars ("/\\"); |
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68 #else |
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69 std::string file_ops::dir_sep_chars (file_ops::dir_sep_str); |
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70 #endif |
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71 |
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72 // We provide a replacement for mkdir(). |
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73 |
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74 int |
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75 file_ops::mkdir (const std::string& name, mode_t mode) |
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76 { |
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77 std::string msg; |
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78 return mkdir (name, mode, msg); |
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79 } |
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80 |
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81 int |
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82 file_ops::mkdir (const std::string& name, mode_t mode, std::string& msg) |
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83 { |
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84 msg = std::string (); |
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85 |
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86 int status = -1; |
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87 |
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88 #if defined (HAVE_MKDIR) |
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89 |
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90 #if defined (MKDIR_TAKES_ONE_ARG) |
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91 status = ::mkdir (name.c_str ()); |
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92 #else |
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93 status = ::mkdir (name.c_str (), mode); |
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94 #endif |
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95 |
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96 if (status < 0) |
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97 { |
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98 using namespace std; |
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99 msg = ::strerror (errno); |
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100 } |
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101 #else |
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102 msg = NOT_SUPPORTED ("mkdir"); |
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103 #endif |
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104 |
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105 return status; |
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106 } |
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107 |
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108 // I don't know how to emulate this on systems that don't provide it. |
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109 |
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110 int |
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111 file_ops::mkfifo (const std::string& name, mode_t mode) |
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112 { |
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113 std::string msg; |
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114 return mkfifo (name, mode, msg); |
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115 } |
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116 |
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117 int |
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118 file_ops::mkfifo (const std::string& name, mode_t mode, std::string& msg) |
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119 { |
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120 msg = std::string (); |
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121 |
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122 int status = -1; |
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123 |
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124 #if defined (HAVE_MKFIFO) |
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125 status = ::mkfifo (name.c_str (), mode); |
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126 |
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127 if (status < 0) |
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128 { |
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129 using namespace std; |
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130 msg = ::strerror (errno); |
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131 } |
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132 #else |
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133 msg = NOT_SUPPORTED ("mkfifo"); |
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134 #endif |
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135 |
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136 return status; |
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137 } |
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138 |
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139 // I don't know how to emulate this on systems that don't provide it. |
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140 |
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141 int |
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142 file_ops::link (const std::string& old_name, const std::string& new_name) |
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143 { |
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144 std::string msg; |
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145 return link (old_name, new_name, msg); |
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146 } |
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147 |
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148 int |
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149 file_ops::link (const std::string& old_name, |
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150 const std::string& new_name, std::string& msg) |
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151 { |
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152 msg = std::string (); |
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153 |
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154 int status = -1; |
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155 |
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156 #if defined (HAVE_LINK) |
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157 status = ::link (old_name.c_str (), new_name.c_str ()); |
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158 |
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159 if (status < 0) |
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160 { |
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161 using namespace std; |
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162 msg = ::strerror (errno); |
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163 } |
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164 #else |
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165 msg = NOT_SUPPORTED ("link"); |
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166 #endif |
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167 |
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168 return status; |
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169 } |
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170 |
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171 // I don't know how to emulate this on systems that don't provide it. |
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172 |
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173 int |
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174 file_ops::symlink (const std::string& old_name, const std::string& new_name) |
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175 { |
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176 std::string msg; |
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177 return symlink (old_name, new_name, msg); |
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178 } |
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179 |
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180 int |
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181 file_ops::symlink (const std::string& old_name, |
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182 const std::string& new_name, std::string& msg) |
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183 { |
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184 msg = std::string (); |
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185 |
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186 int status = -1; |
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187 |
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188 #if defined (HAVE_SYMLINK) |
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189 |
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190 OCTAVE_LOCAL_BUFFER (char, old_nm, old_name.length ()); |
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191 OCTAVE_LOCAL_BUFFER (char, new_nm, new_name.length ()); |
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192 |
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193 strcpy (old_nm, old_name.c_str ()); |
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194 strcpy (new_nm, new_name.c_str ()); |
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195 |
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196 status = ::symlink (old_nm, new_nm); |
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197 |
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198 if (status < 0) |
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199 { |
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200 using namespace std; |
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201 msg = ::strerror (errno); |
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202 } |
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203 #else |
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204 msg = NOT_SUPPORTED ("symlink"); |
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205 #endif |
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206 |
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207 return status; |
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208 } |
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209 |
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210 // We provide a replacement for rename(). |
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211 |
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212 int |
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213 file_ops::readlink (const std::string& path, std::string& result) |
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214 { |
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215 std::string msg; |
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216 return readlink (path, result, msg); |
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217 } |
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218 |
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219 int |
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220 file_ops::readlink (const std::string& path, std::string& result, |
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221 std::string& msg) |
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222 { |
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223 int status = -1; |
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224 |
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225 msg = std::string (); |
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226 |
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227 #if defined (HAVE_READLINK) |
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228 char buf[MAXPATHLEN+1]; |
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229 |
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230 OCTAVE_LOCAL_BUFFER (char, p, path.length ()); |
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231 |
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232 strcpy (p, path.c_str ()); |
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233 |
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234 status = ::readlink (p, buf, MAXPATHLEN); |
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235 |
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236 if (status < 0) |
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237 { |
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238 using namespace std; |
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239 msg = ::strerror (errno); |
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240 } |
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241 else |
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242 { |
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243 buf[status] = '\0'; |
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244 result = std::string (buf); |
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245 status = 0; |
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246 } |
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247 #else |
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248 msg = NOT_SUPPORTED ("rename"); |
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249 #endif |
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250 |
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251 return status; |
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252 } |
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253 |
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254 // We provide a replacement for rename(). |
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255 |
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256 int |
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257 file_ops::rename (const std::string& from, const std::string& to) |
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258 { |
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259 std::string msg; |
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260 return rename (from, to, msg); |
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261 } |
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262 |
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263 int |
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264 file_ops::rename (const std::string& from, const std::string& to, |
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265 std::string& msg) |
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266 { |
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267 int status = -1; |
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268 |
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269 msg = std::string (); |
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270 |
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271 #if defined (HAVE_RENAME) |
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272 status = ::rename (from.c_str (), to.c_str ()); |
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273 |
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274 if (status < 0) |
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275 { |
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276 using namespace std; |
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277 msg = ::strerror (errno); |
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278 } |
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279 #else |
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280 msg = NOT_SUPPORTED ("rename"); |
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281 #endif |
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282 |
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283 return status; |
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284 } |
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285 |
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286 // We provide a replacement for rmdir(). |
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287 |
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288 int |
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289 file_ops::rmdir (const std::string& name) |
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290 { |
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291 std::string msg; |
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292 return rmdir (name, msg); |
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293 } |
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294 |
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295 int |
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296 file_ops::rmdir (const std::string& name, std::string& msg) |
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297 { |
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298 msg = std::string (); |
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299 |
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300 int status = -1; |
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301 |
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302 #if defined (HAVE_RMDIR) |
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303 status = ::rmdir (name.c_str ()); |
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304 |
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305 if (status < 0) |
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306 { |
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307 using namespace std; |
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308 msg = ::strerror (errno); |
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309 } |
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310 #else |
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311 msg = NOT_SUPPORTED ("rmdir"); |
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312 #endif |
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313 |
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314 return status; |
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315 } |
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316 |
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317 // And a version that works recursively. |
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318 |
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319 int |
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320 file_ops::recursive_rmdir (const std::string& name) |
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321 { |
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322 std::string msg; |
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323 return recursive_rmdir (name, msg); |
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324 } |
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325 |
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326 int |
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327 file_ops::recursive_rmdir (const std::string& name, std::string& msg) |
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328 { |
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329 msg = std::string (); |
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330 |
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331 int status = 0; |
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332 |
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333 dir_entry dir (name); |
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334 |
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335 if (dir) |
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336 { |
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337 string_vector dirlist = dir.read (); |
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338 |
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339 for (octave_idx_type i = 0; i < dirlist.length (); i++) |
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340 { |
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341 OCTAVE_QUIT; |
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342 |
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343 std::string nm = dirlist[i]; |
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344 |
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345 // Skip current directory and parent. |
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346 if (nm == "." || nm == "..") |
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347 continue; |
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348 |
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349 std::string fullnm = name + file_ops::dir_sep_str + nm; |
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350 |
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351 // Get info about the file. Don't follow links. |
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352 file_stat fs (fullnm, false); |
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353 |
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354 if (fs) |
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355 { |
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356 if (fs.is_dir ()) |
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357 { |
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358 status = recursive_rmdir (fullnm, msg); |
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359 |
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360 if (status < 0) |
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361 break; |
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362 } |
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363 else |
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364 { |
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365 status = unlink (fullnm, msg); |
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366 |
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367 if (status < 0) |
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368 break; |
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369 } |
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370 } |
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371 else |
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372 { |
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373 msg = fs.error (); |
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374 break; |
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375 } |
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376 } |
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377 |
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378 if (status >= 0) |
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6363
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379 { |
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380 dir.close (); |
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381 status = file_ops::rmdir (name, msg); |
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382 } |
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5476
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383 } |
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384 else |
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385 { |
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386 status = -1; |
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387 |
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388 msg = dir.error (); |
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389 } |
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390 |
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391 return status; |
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392 } |
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393 |
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5138
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394 std::string |
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395 file_ops::canonicalize_file_name (const std::string& name) |
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396 { |
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397 std::string msg; |
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398 return canonicalize_file_name (name, msg); |
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399 } |
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400 |
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401 std::string |
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402 file_ops::canonicalize_file_name (const std::string& name, std::string& msg) |
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403 { |
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404 msg = std::string (); |
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405 |
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406 std::string retval; |
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407 |
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408 #if defined (HAVE_CANONICALIZE_FILE_NAME) |
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409 |
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410 char *tmp = ::canonicalize_file_name (name.c_str ()); |
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411 |
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412 if (tmp) |
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413 { |
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414 retval = tmp; |
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415 ::free (tmp); |
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416 } |
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417 |
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418 #elif defined (HAVE_RESOLVEPATH) |
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419 |
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420 #if !defined (errno) |
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421 extern int errno; |
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422 #endif |
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423 |
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424 #if !defined (__set_errno) |
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425 # define __set_errno(Val) errno = (Val) |
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426 #endif |
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427 |
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428 if (name.empty ()) |
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429 { |
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430 __set_errno (ENOENT); |
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431 return retval; |
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432 } |
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433 |
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434 // All known hosts with resolvepath (e.g. Solaris 7) don't turn |
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435 // relative names into absolute ones, so prepend the working |
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436 // directory if the path is not absolute. |
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437 |
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5149
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438 std::string absolute_name |
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439 = octave_env::make_absolute (name, octave_env::getcwd ()); |
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5138
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440 |
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5149
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441 size_t resolved_size = absolute_name.length (); |
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5138
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442 |
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6208
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443 while (true) |
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5138
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444 { |
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445 resolved_size = 2 * resolved_size + 1; |
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446 |
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447 OCTAVE_LOCAL_BUFFER (char, resolved, resolved_size); |
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448 |
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5149
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449 int resolved_len |
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450 = ::resolvepath (absolute_name.c_str (), resolved, resolved_size); |
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5138
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451 |
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452 if (resolved_len < 0) |
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453 break; |
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454 |
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455 if (resolved_len < resolved_size) |
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456 { |
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457 retval = resolved; |
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458 break; |
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459 } |
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460 } |
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461 |
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6208
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462 #elif defined (__WIN32__) |
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463 |
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464 int n = 1024; |
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465 |
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466 std::string win_path (n, '\0'); |
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467 |
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468 while (true) |
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469 { |
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7520
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470 int status = GetFullPathName (name.c_str (), n, &win_path[0], 0); |
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6208
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471 |
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472 if (status == 0) |
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473 break; |
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474 else if (status < n) |
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475 { |
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476 win_path.resize (status); |
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477 retval = win_path; |
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478 break; |
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479 } |
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480 else |
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481 { |
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482 n *= 2; |
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483 win_path.resize (n); |
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484 } |
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485 } |
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486 |
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6271
|
487 #elif defined (HAVE_REALPATH) |
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488 |
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|
489 #if !defined (__set_errno) |
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|
490 # define __set_errno(Val) errno = (Val) |
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491 #endif |
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492 |
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|
493 if (name.empty ()) |
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494 { |
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|
495 __set_errno (ENOENT); |
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496 return retval; |
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|
497 } |
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|
498 |
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|
499 OCTAVE_LOCAL_BUFFER (char, buf, PATH_MAX); |
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500 |
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6273
|
501 if (::realpath (name.c_str (), buf)) |
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|
502 retval = buf; |
|
6271
|
503 |
|
5138
|
504 #else |
|
|
505 |
|
5775
|
506 // FIXME -- provide replacement here... |
|
5138
|
507 retval = name; |
|
|
508 |
|
|
509 #endif |
|
|
510 |
|
|
511 if (retval.empty ()) |
|
|
512 { |
|
|
513 using namespace std; |
|
|
514 msg = ::strerror (errno); |
|
|
515 } |
|
|
516 |
|
|
517 return retval; |
|
|
518 } |
|
|
519 |
|
2433
|
520 // We provide a replacement for tempnam(). |
|
|
521 |
|
3504
|
522 std::string |
|
|
523 file_ops::tempnam (const std::string& dir, const std::string& pfx) |
|
1802
|
524 { |
|
3504
|
525 std::string msg; |
|
2937
|
526 return tempnam (dir, pfx, msg); |
|
|
527 } |
|
|
528 |
|
3504
|
529 std::string |
|
|
530 file_ops::tempnam (const std::string& dir, const std::string& pfx, |
|
|
531 std::string& msg) |
|
2937
|
532 { |
|
3504
|
533 msg = std::string (); |
|
2937
|
534 |
|
3504
|
535 std::string retval; |
|
2937
|
536 |
|
|
537 const char *pdir = dir.empty () ? 0 : dir.c_str (); |
|
1802
|
538 |
|
2937
|
539 const char *ppfx = pfx.empty () ? 0 : pfx.c_str (); |
|
|
540 |
|
|
541 char *tmp = ::tempnam (pdir, ppfx); |
|
1802
|
542 |
|
|
543 if (tmp) |
|
|
544 { |
|
|
545 retval = tmp; |
|
|
546 |
|
2937
|
547 ::free (tmp); |
|
1802
|
548 } |
|
|
549 else |
|
3504
|
550 { |
|
|
551 using namespace std; |
|
|
552 msg = ::strerror (errno); |
|
|
553 } |
|
1802
|
554 |
|
|
555 return retval; |
|
|
556 } |
|
|
557 |
|
3040
|
558 // The following tilde-expansion code was stolen and adapted from |
|
|
559 // readline. |
|
2926
|
560 |
|
3040
|
561 // The default value of tilde_additional_prefixes. This is set to |
|
|
562 // whitespace preceding a tilde so that simple programs which do not |
|
|
563 // perform any word separation get desired behaviour. |
|
|
564 static const char *default_prefixes[] = { " ~", "\t~", ":~", 0 }; |
|
|
565 |
|
|
566 // The default value of tilde_additional_suffixes. This is set to |
|
|
567 // whitespace or newline so that simple programs which do not perform |
|
|
568 // any word separation get desired behaviour. |
|
|
569 static const char *default_suffixes[] = { " ", "\n", ":", 0 }; |
|
|
570 |
|
|
571 // If non-null, this contains the address of a function that the |
|
|
572 // application wants called before trying the standard tilde |
|
|
573 // expansions. The function is called with the text sans tilde, and |
|
|
574 // returns a malloc()'ed string which is the expansion, or a NULL |
|
|
575 // pointer if the expansion fails. |
|
|
576 file_ops::tilde_expansion_hook file_ops::tilde_expansion_preexpansion_hook = 0; |
|
|
577 |
|
|
578 // If non-null, this contains the address of a function to call if the |
|
|
579 // standard meaning for expanding a tilde fails. The function is |
|
|
580 // called with the text (sans tilde, as in "foo"), and returns a |
|
|
581 // malloc()'ed string which is the expansion, or a NULL pointer if |
|
|
582 // there is no expansion. |
|
|
583 file_ops::tilde_expansion_hook file_ops::tilde_expansion_failure_hook = 0; |
|
|
584 |
|
|
585 // When non-null, this is a NULL terminated array of strings which are |
|
|
586 // duplicates for a tilde prefix. Bash uses this to expand `=~' and |
|
|
587 // `:~'. |
|
|
588 string_vector file_ops::tilde_additional_prefixes = default_prefixes; |
|
|
589 |
|
|
590 // When non-null, this is a NULL terminated array of strings which |
|
|
591 // match the end of a username, instead of just "/". Bash sets this |
|
|
592 // to `:' and `=~'. |
|
|
593 string_vector file_ops::tilde_additional_suffixes = default_suffixes; |
|
|
594 |
|
|
595 // Find the start of a tilde expansion in S, and return the index |
|
|
596 // of the tilde which starts the expansion. Place the length of the |
|
|
597 // text which identified this tilde starter in LEN, excluding the |
|
|
598 // tilde itself. |
|
|
599 |
|
|
600 static size_t |
|
3504
|
601 tilde_find_prefix (const std::string& s, size_t& len) |
|
3040
|
602 { |
|
|
603 len = 0; |
|
|
604 |
|
|
605 size_t s_len = s.length (); |
|
|
606 |
|
|
607 if (s_len == 0 || s[0] == '~') |
|
|
608 return 0; |
|
|
609 |
|
|
610 string_vector prefixes = file_ops::tilde_additional_prefixes; |
|
|
611 |
|
|
612 if (! prefixes.empty ()) |
|
|
613 { |
|
|
614 for (size_t i = 0; i < s_len; i++) |
|
|
615 { |
|
|
616 for (int j = 0; j < prefixes.length (); j++) |
|
|
617 { |
|
|
618 size_t pfx_len = prefixes[j].length (); |
|
|
619 |
|
|
620 if (prefixes[j].compare (s.substr (i, pfx_len)) == 0) |
|
|
621 { |
|
|
622 len = pfx_len - 1; |
|
|
623 return i + len; |
|
|
624 } |
|
|
625 } |
|
|
626 } |
|
|
627 } |
|
|
628 |
|
|
629 return s_len; |
|
|
630 } |
|
|
631 |
|
|
632 // Find the end of a tilde expansion in S, and return the index |
|
|
633 // of the character which ends the tilde definition. |
|
|
634 |
|
|
635 static size_t |
|
3504
|
636 tilde_find_suffix (const std::string& s) |
|
3040
|
637 { |
|
|
638 size_t s_len = s.length (); |
|
|
639 |
|
|
640 string_vector suffixes = file_ops::tilde_additional_suffixes; |
|
|
641 |
|
|
642 size_t i = 0; |
|
|
643 |
|
|
644 for ( ; i < s_len; i++) |
|
|
645 { |
|
6694
|
646 if (file_ops::is_dir_sep (s[i])) |
|
3040
|
647 break; |
|
|
648 |
|
|
649 if (! suffixes.empty ()) |
|
|
650 { |
|
|
651 for (int j = 0; j < suffixes.length (); j++) |
|
|
652 { |
|
|
653 size_t sfx_len = suffixes[j].length (); |
|
|
654 |
|
|
655 if (suffixes[j].compare (s.substr (i, sfx_len)) == 0) |
|
|
656 return i; |
|
|
657 } |
|
|
658 } |
|
|
659 } |
|
|
660 |
|
|
661 return i; |
|
|
662 } |
|
|
663 |
|
|
664 // Take FNAME and return the tilde prefix we want expanded. |
|
|
665 |
|
3504
|
666 static std::string |
|
|
667 isolate_tilde_prefix (const std::string& fname) |
|
3040
|
668 { |
|
|
669 size_t f_len = fname.length (); |
|
|
670 |
|
|
671 size_t len = 1; |
|
|
672 |
|
6694
|
673 while (len < f_len && ! file_ops::is_dir_sep (fname[len])) |
|
3040
|
674 len++; |
|
|
675 |
|
|
676 return fname.substr (1, len); |
|
|
677 } |
|
|
678 |
|
|
679 // Do the work of tilde expansion on FILENAME. FILENAME starts with a |
|
|
680 // tilde. |
|
|
681 |
|
3504
|
682 static std::string |
|
|
683 tilde_expand_word (const std::string& filename) |
|
3040
|
684 { |
|
|
685 size_t f_len = filename.length (); |
|
|
686 |
|
|
687 if (f_len == 0 || filename[0] != '~') |
|
|
688 return filename; |
|
|
689 |
|
|
690 // A leading `~/' or a bare `~' is *always* translated to the value |
|
|
691 // of $HOME or the home directory of the current user, regardless of |
|
|
692 // any preexpansion hook. |
|
|
693 |
|
6694
|
694 if (f_len == 1 || file_ops::is_dir_sep (filename[1])) |
|
3040
|
695 return octave_env::get_home_directory () + filename.substr (1); |
|
|
696 |
|
3504
|
697 std::string username = isolate_tilde_prefix (filename); |
|
3040
|
698 |
|
|
699 size_t user_len = username.length (); |
|
|
700 |
|
3504
|
701 std::string dirname; |
|
3040
|
702 |
|
|
703 if (file_ops::tilde_expansion_preexpansion_hook) |
|
|
704 { |
|
3504
|
705 std::string expansion |
|
3040
|
706 = file_ops::tilde_expansion_preexpansion_hook (username); |
|
|
707 |
|
|
708 if (! expansion.empty ()) |
|
3074
|
709 return expansion + filename.substr (user_len+1); |
|
3040
|
710 } |
|
|
711 |
|
|
712 // No preexpansion hook, or the preexpansion hook failed. Look in the |
|
|
713 // password database. |
|
|
714 |
|
|
715 octave_passwd pw = octave_passwd::getpwnam (username); |
|
|
716 |
|
|
717 if (! pw) |
|
|
718 { |
|
|
719 // If the calling program has a special syntax for expanding tildes, |
|
|
720 // and we couldn't find a standard expansion, then let them try. |
|
|
721 |
|
|
722 if (file_ops::tilde_expansion_failure_hook) |
|
|
723 { |
|
3504
|
724 std::string expansion |
|
3040
|
725 = file_ops::tilde_expansion_failure_hook (username); |
|
|
726 |
|
|
727 if (! expansion.empty ()) |
|
3074
|
728 dirname = expansion + filename.substr (user_len+1); |
|
3040
|
729 } |
|
|
730 |
|
|
731 // If we don't have a failure hook, or if the failure hook did not |
|
|
732 // expand the tilde, return a copy of what we were passed. |
|
|
733 |
|
|
734 if (dirname.length () == 0) |
|
|
735 dirname = filename; |
|
|
736 } |
|
|
737 else |
|
3074
|
738 dirname = pw.dir () + filename.substr (user_len+1); |
|
3040
|
739 |
|
|
740 return dirname; |
|
|
741 } |
|
|
742 |
|
|
743 // If NAME has a leading ~ or ~user, Unix-style, expand it to the |
|
|
744 // user's home directory. If no ~, or no <pwd.h>, just return NAME. |
|
|
745 |
|
3504
|
746 std::string |
|
|
747 file_ops::tilde_expand (const std::string& name) |
|
2926
|
748 { |
|
3504
|
749 std::string result; |
|
2926
|
750 |
|
3040
|
751 size_t name_len = name.length (); |
|
2926
|
752 |
|
3040
|
753 // Scan through S expanding tildes as we come to them. |
|
2926
|
754 |
|
3040
|
755 size_t pos = 0; |
|
2926
|
756 |
|
3040
|
757 while (1) |
|
|
758 { |
|
|
759 if (pos > name_len) |
|
|
760 break; |
|
2926
|
761 |
|
3040
|
762 size_t len; |
|
|
763 |
|
|
764 // Make START point to the tilde which starts the expansion. |
|
2926
|
765 |
|
3040
|
766 size_t start = tilde_find_prefix (name.substr (pos), len); |
|
|
767 |
|
|
768 result.append (name.substr (pos, start)); |
|
2926
|
769 |
|
3040
|
770 // Advance STRING to the starting tilde. |
|
|
771 |
|
|
772 pos += start; |
|
2926
|
773 |
|
3040
|
774 // Make FINI be the index of one after the last character of the |
|
|
775 // username. |
|
2926
|
776 |
|
3040
|
777 size_t fini = tilde_find_suffix (name.substr (pos)); |
|
2926
|
778 |
|
3040
|
779 // If both START and FINI are zero, we are all done. |
|
2926
|
780 |
|
3040
|
781 if (! (start || fini)) |
|
|
782 break; |
|
2926
|
783 |
|
3040
|
784 // Expand the entire tilde word, and copy it into RESULT. |
|
2947
|
785 |
|
3504
|
786 std::string tilde_word = name.substr (pos, fini); |
|
3040
|
787 |
|
|
788 pos += fini; |
|
2926
|
789 |
|
3504
|
790 std::string expansion = tilde_expand_word (tilde_word); |
|
3040
|
791 |
|
|
792 result.append (expansion); |
|
2926
|
793 } |
|
|
794 |
|
3040
|
795 return result; |
|
2926
|
796 } |
|
|
797 |
|
|
798 // A vector version of the above. |
|
|
799 |
|
|
800 string_vector |
|
|
801 file_ops::tilde_expand (const string_vector& names) |
|
|
802 { |
|
|
803 string_vector retval; |
|
|
804 |
|
|
805 int n = names.length (); |
|
|
806 |
|
|
807 retval.resize (n); |
|
|
808 |
|
|
809 for (int i = 0; i < n; i++) |
|
|
810 retval[i] = file_ops::tilde_expand (names[i]); |
|
|
811 |
|
|
812 return retval; |
|
|
813 } |
|
1802
|
814 |
|
1765
|
815 int |
|
2926
|
816 file_ops::umask (mode_t mode) |
|
1765
|
817 { |
|
|
818 #if defined (HAVE_UMASK) |
|
2926
|
819 return ::umask (mode); |
|
1765
|
820 #else |
|
|
821 return 0; |
|
|
822 #endif |
|
|
823 } |
|
|
824 |
|
1773
|
825 int |
|
3504
|
826 file_ops::unlink (const std::string& name) |
|
1773
|
827 { |
|
3504
|
828 std::string msg; |
|
2937
|
829 return unlink (name, msg); |
|
1773
|
830 } |
|
|
831 |
|
2668
|
832 int |
|
3504
|
833 file_ops::unlink (const std::string& name, std::string& msg) |
|
2668
|
834 { |
|
3504
|
835 msg = std::string (); |
|
2668
|
836 |
|
2937
|
837 int status = -1; |
|
|
838 |
|
|
839 #if defined (HAVE_UNLINK) |
|
|
840 status = ::unlink (name.c_str ()); |
|
2668
|
841 |
|
|
842 if (status < 0) |
|
3504
|
843 { |
|
|
844 using namespace std; |
|
|
845 msg = ::strerror (errno); |
|
|
846 } |
|
2937
|
847 #else |
|
|
848 msg = NOT_SUPPORTED ("unlink"); |
|
|
849 #endif |
|
2668
|
850 |
|
|
851 return status; |
|
|
852 } |
|
|
853 |
|
4097
|
854 bool |
|
|
855 file_ops::is_dir_sep (char c) |
|
|
856 { |
|
4101
|
857 return dir_sep_chars.find (c) != NPOS; |
|
4097
|
858 } |
|
|
859 |
|
7272
|
860 std::string |
|
|
861 file_ops::concat (const std::string& dir, const std::string& file) |
|
|
862 { |
|
|
863 return dir.empty () |
|
|
864 ? file |
|
|
865 : (is_dir_sep (dir[dir.length()-1]) |
|
|
866 ? dir + file |
|
|
867 : dir + file_ops::dir_sep_char + file); |
|
|
868 } |
|
|
869 |
|
1765
|
870 /* |
|
|
871 ;;; Local Variables: *** |
|
|
872 ;;; mode: C++ *** |
|
|
873 ;;; End: *** |
|
|
874 */ |
