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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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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 "file-ops.h" |
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45 #include "oct-env.h" |
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46 #include "oct-passwd.h" |
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47 #include "pathlen.h" |
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48 #include "statdefs.h" |
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49 #include "str-vec.h" |
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50 |
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51 #define NOT_SUPPORTED(nm) \ |
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52 nm ": not supported on this system" |
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53 |
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54 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) \ |
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55 && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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56 char file_ops::dir_sep_char = '\\'; |
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57 std::string file_ops::dir_sep_str ("\\"); |
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58 #else |
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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 #endif |
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62 |
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63 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) \ |
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64 && defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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65 std::string file_ops::dir_sep_chars ("/\\"); |
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66 #else |
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67 std::string file_ops::dir_sep_chars (file_ops::dir_sep_str); |
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68 #endif |
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69 |
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70 // We provide a replacement for mkdir(). |
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71 |
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72 int |
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73 file_ops::mkdir (const std::string& name, mode_t mode) |
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74 { |
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75 std::string msg; |
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76 return mkdir (name, mode, msg); |
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77 } |
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78 |
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79 int |
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80 file_ops::mkdir (const std::string& name, mode_t mode, std::string& msg) |
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81 { |
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82 msg = std::string (); |
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83 |
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84 int status = -1; |
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85 |
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86 #if defined (HAVE_MKDIR) |
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87 |
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88 #if defined (MKDIR_TAKES_ONE_ARG) |
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89 status = ::mkdir (name.c_str ()); |
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90 #else |
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91 status = ::mkdir (name.c_str (), mode); |
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92 #endif |
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93 |
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94 if (status < 0) |
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95 { |
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96 using namespace std; |
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97 msg = ::strerror (errno); |
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98 } |
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99 #else |
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100 msg = NOT_SUPPORTED ("mkdir"); |
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101 #endif |
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102 |
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103 return status; |
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104 } |
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105 |
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106 // I don't know how to emulate this on systems that don't provide it. |
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107 |
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108 int |
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109 file_ops::mkfifo (const std::string& name, mode_t mode) |
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110 { |
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111 std::string msg; |
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112 return mkfifo (name, mode, msg); |
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113 } |
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114 |
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115 int |
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116 file_ops::mkfifo (const std::string& name, mode_t mode, std::string& msg) |
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117 { |
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118 msg = std::string (); |
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119 |
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120 int status = -1; |
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121 |
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122 #if defined (HAVE_MKFIFO) |
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123 status = ::mkfifo (name.c_str (), mode); |
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124 |
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125 if (status < 0) |
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126 { |
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127 using namespace std; |
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128 msg = ::strerror (errno); |
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129 } |
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130 #else |
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131 msg = NOT_SUPPORTED ("mkfifo"); |
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132 #endif |
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133 |
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134 return status; |
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135 } |
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136 |
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137 // I don't know how to emulate this on systems that don't provide it. |
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138 |
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139 int |
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140 file_ops::link (const std::string& old_name, const std::string& new_name) |
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141 { |
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142 std::string msg; |
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143 return link (old_name, new_name, msg); |
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144 } |
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145 |
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146 int |
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147 file_ops::link (const std::string& old_name, |
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148 const std::string& new_name, std::string& msg) |
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149 { |
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150 msg = std::string (); |
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151 |
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152 int status = -1; |
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153 |
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154 #if defined (HAVE_LINK) |
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155 status = ::link (old_name.c_str (), new_name.c_str ()); |
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156 |
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157 if (status < 0) |
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158 { |
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159 using namespace std; |
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160 msg = ::strerror (errno); |
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161 } |
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162 #else |
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163 msg = NOT_SUPPORTED ("link"); |
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164 #endif |
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165 |
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166 return status; |
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167 } |
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168 |
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169 // I don't know how to emulate this on systems that don't provide it. |
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170 |
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171 int |
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172 file_ops::symlink (const std::string& old_name, const std::string& new_name) |
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173 { |
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174 std::string msg; |
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175 return symlink (old_name, new_name, msg); |
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176 } |
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177 |
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178 int |
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179 file_ops::symlink (const std::string& old_name, |
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180 const std::string& new_name, std::string& msg) |
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181 { |
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182 msg = std::string (); |
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183 |
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184 int status = -1; |
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185 |
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186 #if defined (HAVE_SYMLINK) |
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187 |
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188 OCTAVE_LOCAL_BUFFER (char, old_nm, old_name.length ()); |
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189 OCTAVE_LOCAL_BUFFER (char, new_nm, new_name.length ()); |
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190 |
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191 strcpy (old_nm, old_name.c_str ()); |
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192 strcpy (new_nm, new_name.c_str ()); |
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193 |
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194 status = ::symlink (old_nm, new_nm); |
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195 |
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196 if (status < 0) |
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197 { |
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198 using namespace std; |
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199 msg = ::strerror (errno); |
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200 } |
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201 #else |
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202 msg = NOT_SUPPORTED ("symlink"); |
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203 #endif |
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204 |
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205 return status; |
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206 } |
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207 |
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208 // We provide a replacement for rename(). |
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209 |
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210 int |
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211 file_ops::readlink (const std::string& path, std::string& result) |
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212 { |
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213 std::string msg; |
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214 return readlink (path, result, msg); |
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215 } |
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216 |
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217 int |
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218 file_ops::readlink (const std::string& path, std::string& result, |
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219 std::string& msg) |
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220 { |
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221 int status = -1; |
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222 |
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223 msg = std::string (); |
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224 |
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225 #if defined (HAVE_READLINK) |
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226 char buf[MAXPATHLEN+1]; |
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227 |
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228 OCTAVE_LOCAL_BUFFER (char, p, path.length ()); |
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229 |
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230 strcpy (p, path.c_str ()); |
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231 |
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232 status = ::readlink (p, buf, MAXPATHLEN); |
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233 |
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234 if (status < 0) |
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235 { |
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236 using namespace std; |
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237 msg = ::strerror (errno); |
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238 } |
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239 else |
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240 { |
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241 buf[status] = '\0'; |
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242 result = std::string (buf); |
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243 status = 0; |
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244 } |
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245 #else |
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246 msg = NOT_SUPPORTED ("rename"); |
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247 #endif |
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248 |
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249 return status; |
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250 } |
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251 |
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252 // We provide a replacement for rename(). |
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253 |
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254 int |
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255 file_ops::rename (const std::string& from, const std::string& to) |
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256 { |
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257 std::string msg; |
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258 return rename (from, to, msg); |
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259 } |
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260 |
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261 int |
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262 file_ops::rename (const std::string& from, const std::string& to, |
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263 std::string& msg) |
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264 { |
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265 int status = -1; |
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266 |
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267 msg = std::string (); |
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268 |
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269 #if defined (HAVE_RENAME) |
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270 status = ::rename (from.c_str (), to.c_str ()); |
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271 |
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272 if (status < 0) |
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273 { |
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274 using namespace std; |
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275 msg = ::strerror (errno); |
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276 } |
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277 #else |
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278 msg = NOT_SUPPORTED ("rename"); |
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279 #endif |
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280 |
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281 return status; |
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282 } |
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283 |
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284 // We provide a replacement for rmdir(). |
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285 |
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286 int |
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287 file_ops::rmdir (const std::string& name) |
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288 { |
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289 std::string msg; |
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290 return rmdir (name, msg); |
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291 } |
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292 |
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293 int |
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294 file_ops::rmdir (const std::string& name, std::string& msg) |
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295 { |
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296 msg = std::string (); |
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297 |
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298 int status = -1; |
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299 |
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300 #if defined (HAVE_RMDIR) |
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301 status = ::rmdir (name.c_str ()); |
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302 |
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303 if (status < 0) |
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304 { |
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305 using namespace std; |
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306 msg = ::strerror (errno); |
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307 } |
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308 #else |
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309 msg = NOT_SUPPORTED ("rmdir"); |
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310 #endif |
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311 |
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312 return status; |
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313 } |
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314 |
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315 std::string |
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316 file_ops::canonicalize_file_name (const std::string& name) |
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317 { |
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318 std::string msg; |
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319 return canonicalize_file_name (name, msg); |
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320 } |
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321 |
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322 std::string |
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323 file_ops::canonicalize_file_name (const std::string& name, std::string& msg) |
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324 { |
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325 msg = std::string (); |
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326 |
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327 std::string retval; |
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328 |
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329 #if defined (HAVE_CANONICALIZE_FILE_NAME) |
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330 |
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331 char *tmp = ::canonicalize_file_name (name.c_str ()); |
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332 |
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333 if (tmp) |
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334 { |
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335 retval = tmp; |
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336 ::free (tmp); |
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337 } |
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338 |
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339 #elif defined (HAVE_RESOLVEPATH) |
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340 |
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341 #if !defined (errno) |
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342 extern int errno; |
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343 #endif |
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344 |
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345 #if !defined (__set_errno) |
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346 # define __set_errno(Val) errno = (Val) |
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347 #endif |
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348 |
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349 if (name.empty ()) |
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350 { |
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351 __set_errno (ENOENT); |
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352 return retval; |
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353 } |
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354 |
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355 // All known hosts with resolvepath (e.g. Solaris 7) don't turn |
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356 // relative names into absolute ones, so prepend the working |
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357 // directory if the path is not absolute. |
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358 |
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359 std::string absolute_name |
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360 = octave_env::make_absolute (name, octave_env::getcwd ()); |
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361 |
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362 size_t resolved_size = absolute_name.length (); |
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363 |
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364 while (1) |
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365 { |
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366 resolved_size = 2 * resolved_size + 1; |
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367 |
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368 OCTAVE_LOCAL_BUFFER (char, resolved, resolved_size); |
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369 |
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370 int resolved_len |
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371 = ::resolvepath (absolute_name.c_str (), resolved, resolved_size); |
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372 |
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373 if (resolved_len < 0) |
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374 break; |
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375 |
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376 if (resolved_len < resolved_size) |
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377 { |
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378 retval = resolved; |
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379 break; |
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380 } |
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381 } |
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382 |
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383 #else |
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384 |
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385 // XXX FIXME XXX -- provide replacement here... |
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386 retval = name; |
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387 |
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388 #endif |
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389 |
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390 if (retval.empty ()) |
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391 { |
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392 using namespace std; |
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393 msg = ::strerror (errno); |
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394 } |
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395 |
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396 return retval; |
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397 } |
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398 |
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399 // We provide a replacement for tempnam(). |
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400 |
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401 std::string |
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402 file_ops::tempnam (const std::string& dir, const std::string& pfx) |
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403 { |
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404 std::string msg; |
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405 return tempnam (dir, pfx, msg); |
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406 } |
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407 |
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408 std::string |
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409 file_ops::tempnam (const std::string& dir, const std::string& pfx, |
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410 std::string& msg) |
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411 { |
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412 msg = std::string (); |
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413 |
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414 std::string retval; |
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415 |
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416 const char *pdir = dir.empty () ? 0 : dir.c_str (); |
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417 |
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418 const char *ppfx = pfx.empty () ? 0 : pfx.c_str (); |
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419 |
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420 char *tmp = ::tempnam (pdir, ppfx); |
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421 |
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422 if (tmp) |
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423 { |
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424 retval = tmp; |
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425 |
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426 ::free (tmp); |
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427 } |
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428 else |
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429 { |
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430 using namespace std; |
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431 msg = ::strerror (errno); |
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432 } |
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433 |
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434 return retval; |
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435 } |
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436 |
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3040
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437 // The following tilde-expansion code was stolen and adapted from |
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438 // readline. |
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439 |
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440 // The default value of tilde_additional_prefixes. This is set to |
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441 // whitespace preceding a tilde so that simple programs which do not |
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442 // perform any word separation get desired behaviour. |
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443 static const char *default_prefixes[] = { " ~", "\t~", ":~", 0 }; |
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444 |
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445 // The default value of tilde_additional_suffixes. This is set to |
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446 // whitespace or newline so that simple programs which do not perform |
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447 // any word separation get desired behaviour. |
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448 static const char *default_suffixes[] = { " ", "\n", ":", 0 }; |
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449 |
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450 // If non-null, this contains the address of a function that the |
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451 // application wants called before trying the standard tilde |
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452 // expansions. The function is called with the text sans tilde, and |
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453 // returns a malloc()'ed string which is the expansion, or a NULL |
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454 // pointer if the expansion fails. |
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455 file_ops::tilde_expansion_hook file_ops::tilde_expansion_preexpansion_hook = 0; |
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456 |
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457 // If non-null, this contains the address of a function to call if the |
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458 // standard meaning for expanding a tilde fails. The function is |
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459 // called with the text (sans tilde, as in "foo"), and returns a |
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460 // malloc()'ed string which is the expansion, or a NULL pointer if |
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461 // there is no expansion. |
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462 file_ops::tilde_expansion_hook file_ops::tilde_expansion_failure_hook = 0; |
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463 |
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464 // When non-null, this is a NULL terminated array of strings which are |
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465 // duplicates for a tilde prefix. Bash uses this to expand `=~' and |
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466 // `:~'. |
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467 string_vector file_ops::tilde_additional_prefixes = default_prefixes; |
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468 |
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469 // When non-null, this is a NULL terminated array of strings which |
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470 // match the end of a username, instead of just "/". Bash sets this |
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471 // to `:' and `=~'. |
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472 string_vector file_ops::tilde_additional_suffixes = default_suffixes; |
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473 |
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474 // Find the start of a tilde expansion in S, and return the index |
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475 // of the tilde which starts the expansion. Place the length of the |
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476 // text which identified this tilde starter in LEN, excluding the |
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477 // tilde itself. |
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478 |
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479 static size_t |
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3504
|
480 tilde_find_prefix (const std::string& s, size_t& len) |
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3040
|
481 { |
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|
482 len = 0; |
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|
483 |
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|
484 size_t s_len = s.length (); |
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|
485 |
|
|
486 if (s_len == 0 || s[0] == '~') |
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|
487 return 0; |
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|
488 |
|
|
489 string_vector prefixes = file_ops::tilde_additional_prefixes; |
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|
490 |
|
|
491 if (! prefixes.empty ()) |
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|
492 { |
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|
493 for (size_t i = 0; i < s_len; i++) |
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|
494 { |
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|
495 for (int j = 0; j < prefixes.length (); j++) |
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|
496 { |
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|
497 size_t pfx_len = prefixes[j].length (); |
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|
498 |
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499 if (prefixes[j].compare (s.substr (i, pfx_len)) == 0) |
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|
500 { |
|
|
501 len = pfx_len - 1; |
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|
502 return i + len; |
|
|
503 } |
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|
504 } |
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|
505 } |
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|
506 } |
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|
507 |
|
|
508 return s_len; |
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|
509 } |
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|
510 |
|
|
511 // Find the end of a tilde expansion in S, and return the index |
|
|
512 // of the character which ends the tilde definition. |
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|
513 |
|
|
514 static size_t |
|
3504
|
515 tilde_find_suffix (const std::string& s) |
|
3040
|
516 { |
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|
517 size_t s_len = s.length (); |
|
|
518 |
|
|
519 string_vector suffixes = file_ops::tilde_additional_suffixes; |
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|
520 |
|
|
521 size_t i = 0; |
|
|
522 |
|
|
523 for ( ; i < s_len; i++) |
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|
524 { |
|
4101
|
525 if (s[i] == file_ops::dir_sep_char) |
|
3040
|
526 break; |
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|
527 |
|
|
528 if (! suffixes.empty ()) |
|
|
529 { |
|
|
530 for (int j = 0; j < suffixes.length (); j++) |
|
|
531 { |
|
|
532 size_t sfx_len = suffixes[j].length (); |
|
|
533 |
|
|
534 if (suffixes[j].compare (s.substr (i, sfx_len)) == 0) |
|
|
535 return i; |
|
|
536 } |
|
|
537 } |
|
|
538 } |
|
|
539 |
|
|
540 return i; |
|
|
541 } |
|
|
542 |
|
|
543 // Take FNAME and return the tilde prefix we want expanded. |
|
|
544 |
|
3504
|
545 static std::string |
|
|
546 isolate_tilde_prefix (const std::string& fname) |
|
3040
|
547 { |
|
|
548 size_t f_len = fname.length (); |
|
|
549 |
|
|
550 size_t len = 1; |
|
|
551 |
|
4101
|
552 while (len < f_len && fname[len] != file_ops::dir_sep_char) |
|
3040
|
553 len++; |
|
|
554 |
|
|
555 return fname.substr (1, len); |
|
|
556 } |
|
|
557 |
|
|
558 // Do the work of tilde expansion on FILENAME. FILENAME starts with a |
|
|
559 // tilde. |
|
|
560 |
|
3504
|
561 static std::string |
|
|
562 tilde_expand_word (const std::string& filename) |
|
3040
|
563 { |
|
|
564 size_t f_len = filename.length (); |
|
|
565 |
|
|
566 if (f_len == 0 || filename[0] != '~') |
|
|
567 return filename; |
|
|
568 |
|
|
569 // A leading `~/' or a bare `~' is *always* translated to the value |
|
|
570 // of $HOME or the home directory of the current user, regardless of |
|
|
571 // any preexpansion hook. |
|
|
572 |
|
4101
|
573 if (f_len == 1 || filename[1] == file_ops::dir_sep_char) |
|
3040
|
574 return octave_env::get_home_directory () + filename.substr (1); |
|
|
575 |
|
3504
|
576 std::string username = isolate_tilde_prefix (filename); |
|
3040
|
577 |
|
|
578 size_t user_len = username.length (); |
|
|
579 |
|
3504
|
580 std::string dirname; |
|
3040
|
581 |
|
|
582 if (file_ops::tilde_expansion_preexpansion_hook) |
|
|
583 { |
|
3504
|
584 std::string expansion |
|
3040
|
585 = file_ops::tilde_expansion_preexpansion_hook (username); |
|
|
586 |
|
|
587 if (! expansion.empty ()) |
|
3074
|
588 return expansion + filename.substr (user_len+1); |
|
3040
|
589 } |
|
|
590 |
|
|
591 // No preexpansion hook, or the preexpansion hook failed. Look in the |
|
|
592 // password database. |
|
|
593 |
|
|
594 octave_passwd pw = octave_passwd::getpwnam (username); |
|
|
595 |
|
|
596 if (! pw) |
|
|
597 { |
|
|
598 // If the calling program has a special syntax for expanding tildes, |
|
|
599 // and we couldn't find a standard expansion, then let them try. |
|
|
600 |
|
|
601 if (file_ops::tilde_expansion_failure_hook) |
|
|
602 { |
|
3504
|
603 std::string expansion |
|
3040
|
604 = file_ops::tilde_expansion_failure_hook (username); |
|
|
605 |
|
|
606 if (! expansion.empty ()) |
|
3074
|
607 dirname = expansion + filename.substr (user_len+1); |
|
3040
|
608 } |
|
|
609 |
|
|
610 // If we don't have a failure hook, or if the failure hook did not |
|
|
611 // expand the tilde, return a copy of what we were passed. |
|
|
612 |
|
|
613 if (dirname.length () == 0) |
|
|
614 dirname = filename; |
|
|
615 } |
|
|
616 else |
|
3074
|
617 dirname = pw.dir () + filename.substr (user_len+1); |
|
3040
|
618 |
|
|
619 return dirname; |
|
|
620 } |
|
|
621 |
|
|
622 // If NAME has a leading ~ or ~user, Unix-style, expand it to the |
|
|
623 // user's home directory. If no ~, or no <pwd.h>, just return NAME. |
|
|
624 |
|
3504
|
625 std::string |
|
|
626 file_ops::tilde_expand (const std::string& name) |
|
2926
|
627 { |
|
3504
|
628 std::string result; |
|
2926
|
629 |
|
3040
|
630 size_t name_len = name.length (); |
|
2926
|
631 |
|
3040
|
632 // Scan through S expanding tildes as we come to them. |
|
2926
|
633 |
|
3040
|
634 size_t pos = 0; |
|
2926
|
635 |
|
3040
|
636 while (1) |
|
|
637 { |
|
|
638 if (pos > name_len) |
|
|
639 break; |
|
2926
|
640 |
|
3040
|
641 size_t len; |
|
|
642 |
|
|
643 // Make START point to the tilde which starts the expansion. |
|
2926
|
644 |
|
3040
|
645 size_t start = tilde_find_prefix (name.substr (pos), len); |
|
|
646 |
|
|
647 result.append (name.substr (pos, start)); |
|
2926
|
648 |
|
3040
|
649 // Advance STRING to the starting tilde. |
|
|
650 |
|
|
651 pos += start; |
|
2926
|
652 |
|
3040
|
653 // Make FINI be the index of one after the last character of the |
|
|
654 // username. |
|
2926
|
655 |
|
3040
|
656 size_t fini = tilde_find_suffix (name.substr (pos)); |
|
2926
|
657 |
|
3040
|
658 // If both START and FINI are zero, we are all done. |
|
2926
|
659 |
|
3040
|
660 if (! (start || fini)) |
|
|
661 break; |
|
2926
|
662 |
|
3040
|
663 // Expand the entire tilde word, and copy it into RESULT. |
|
2947
|
664 |
|
3504
|
665 std::string tilde_word = name.substr (pos, fini); |
|
3040
|
666 |
|
|
667 pos += fini; |
|
2926
|
668 |
|
3504
|
669 std::string expansion = tilde_expand_word (tilde_word); |
|
3040
|
670 |
|
|
671 result.append (expansion); |
|
2926
|
672 } |
|
|
673 |
|
3040
|
674 return result; |
|
2926
|
675 } |
|
|
676 |
|
|
677 // A vector version of the above. |
|
|
678 |
|
|
679 string_vector |
|
|
680 file_ops::tilde_expand (const string_vector& names) |
|
|
681 { |
|
|
682 string_vector retval; |
|
|
683 |
|
|
684 int n = names.length (); |
|
|
685 |
|
|
686 retval.resize (n); |
|
|
687 |
|
|
688 for (int i = 0; i < n; i++) |
|
|
689 retval[i] = file_ops::tilde_expand (names[i]); |
|
|
690 |
|
|
691 return retval; |
|
|
692 } |
|
1802
|
693 |
|
1765
|
694 int |
|
2926
|
695 file_ops::umask (mode_t mode) |
|
1765
|
696 { |
|
|
697 #if defined (HAVE_UMASK) |
|
2926
|
698 return ::umask (mode); |
|
1765
|
699 #else |
|
|
700 return 0; |
|
|
701 #endif |
|
|
702 } |
|
|
703 |
|
1773
|
704 int |
|
3504
|
705 file_ops::unlink (const std::string& name) |
|
1773
|
706 { |
|
3504
|
707 std::string msg; |
|
2937
|
708 return unlink (name, msg); |
|
1773
|
709 } |
|
|
710 |
|
2668
|
711 int |
|
3504
|
712 file_ops::unlink (const std::string& name, std::string& msg) |
|
2668
|
713 { |
|
3504
|
714 msg = std::string (); |
|
2668
|
715 |
|
2937
|
716 int status = -1; |
|
|
717 |
|
|
718 #if defined (HAVE_UNLINK) |
|
|
719 status = ::unlink (name.c_str ()); |
|
2668
|
720 |
|
|
721 if (status < 0) |
|
3504
|
722 { |
|
|
723 using namespace std; |
|
|
724 msg = ::strerror (errno); |
|
|
725 } |
|
2937
|
726 #else |
|
|
727 msg = NOT_SUPPORTED ("unlink"); |
|
|
728 #endif |
|
2668
|
729 |
|
|
730 return status; |
|
|
731 } |
|
|
732 |
|
4097
|
733 bool |
|
|
734 file_ops::is_dir_sep (char c) |
|
|
735 { |
|
4101
|
736 return dir_sep_chars.find (c) != NPOS; |
|
4097
|
737 } |
|
|
738 |
|
1765
|
739 /* |
|
|
740 ;;; Local Variables: *** |
|
|
741 ;;; mode: C++ *** |
|
|
742 ;;; End: *** |
|
|
743 */ |
