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1 // dirfns.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 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 2, or (at your option) any |
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11 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, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 /* |
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25 |
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26 The functions listed below were adapted from a similar functions |
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27 from GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 |
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28 Free Software Foundation, Inc. |
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29 |
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30 polite_directory_format absolute_pathname |
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31 base_pathname |
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32 make_absolute pathname_backup |
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33 change_to_directory get_working_directory |
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34 |
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35 */ |
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36 |
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37 #ifdef HAVE_CONFIG_H |
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38 #include <config.h> |
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39 #endif |
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40 |
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41 #include <cerrno> |
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42 #include <cstdio> |
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43 #include <cstddef> |
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44 #include <cstdlib> |
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45 #include <cstring> |
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46 |
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47 #include <string> |
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48 |
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49 #include <strstream.h> |
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50 |
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51 #include "str-vec.h" |
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52 |
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53 #include "defun.h" |
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54 #include "dir-ops.h" |
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55 #include "dirfns.h" |
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56 #include "error.h" |
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57 #include "file-ops.h" |
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58 #include "gripes.h" |
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59 #include "help.h" |
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60 #include "oct-obj.h" |
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61 #include "pager.h" |
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62 #include "pathlen.h" |
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63 #include "procstream.h" |
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64 #include "pt-plot.h" |
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65 #include "sysdep.h" |
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66 #include "toplev.h" |
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67 #include "unwind-prot.h" |
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68 #include "utils.h" |
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69 #include "variables.h" |
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70 |
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71 // Non-zero means follow symbolic links that point to directories just |
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72 // as if they are real directories. |
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73 static int follow_symbolic_links = 1; |
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74 |
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75 // Non-zero means that pwd always give verbatim directory, regardless |
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76 // of symbolic link following. |
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77 static int verbatim_pwd = 1; |
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78 |
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79 // Remove the last N directories from PATH. Do not PATH blank. |
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80 // PATH must contain enough space for MAXPATHLEN characters. |
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81 |
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82 static void |
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83 pathname_backup (string& path, int n) |
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84 { |
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85 if (path.empty ()) |
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86 return; |
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87 |
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88 size_t i = path.length () - 1; |
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89 |
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90 while (n--) |
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91 { |
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92 while (path[i] == '/' && i > 0) |
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93 i--; |
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94 |
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95 while (path[i] != '/' && i > 0) |
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96 i--; |
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97 |
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98 i++; |
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99 } |
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100 |
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101 path.resize (i); |
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102 } |
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103 |
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104 // Return a pretty pathname. If the first part of the pathname is the |
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105 // same as $HOME, then replace that with `~'. |
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106 |
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107 string |
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108 polite_directory_format (const string& name) |
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109 { |
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110 string retval; |
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111 |
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112 size_t len = home_directory.length (); |
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113 |
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114 if (len > 1 && home_directory.compare (name, 0, len) == 0 |
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115 && (name.length () == len || name[len] == '/')) |
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116 { |
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117 retval = "~"; |
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118 retval.append (name.substr (len)); |
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119 } |
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120 else |
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121 retval = name; |
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122 |
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123 return retval; |
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124 } |
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125 |
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126 // Return 1 if STRING contains an absolute pathname, else 0. |
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127 |
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128 static int |
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129 absolute_pathname (const string& s) |
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130 { |
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131 if (s.empty ()) |
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132 return 0; |
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133 |
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134 if (s[0] == '/') |
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135 return 1; |
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136 |
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137 if (s[0] == '.') |
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138 { |
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139 if (s[1] == '\0' || s[1] == '/') |
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140 return 1; |
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141 |
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142 if (s[1] == '.') |
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143 if (s[2] == '\0' || s[2] == '/') |
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144 return 1; |
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145 } |
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146 |
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147 return 0; |
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148 } |
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149 |
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150 // Return the `basename' of the pathname in STRING (the stuff after |
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151 // the last '/'). If STRING is not a full pathname, simply return it. |
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152 |
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153 string |
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154 base_pathname (const string& s) |
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155 { |
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156 if (! absolute_pathname (s)) |
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157 return s; |
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158 |
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159 size_t pos = s.rfind ('/'); |
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160 |
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161 if (pos == NPOS) |
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162 return s; |
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163 else |
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164 return s.substr (pos+1); |
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165 } |
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166 |
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167 // Turn STRING (a pathname) into an absolute pathname, assuming that |
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168 // DOT_PATH contains the symbolic location of '.'. |
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169 |
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170 string |
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171 make_absolute (const string& s, const string& dot_path) |
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172 { |
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173 if (dot_path.empty () || s[0] == '/' || s.empty ()) |
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174 return s; |
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175 |
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176 string current_path = dot_path; |
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177 |
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178 if (current_path.empty ()) |
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179 current_path = "./"; |
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180 |
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181 size_t pos = current_path.length () - 1; |
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182 |
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183 if (current_path[pos] != '/') |
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184 current_path.append ("/"); |
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185 |
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186 size_t i = 0; |
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187 size_t slen = s.length (); |
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188 |
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189 while (i < slen) |
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190 { |
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191 if (s[i] == '.') |
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192 { |
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193 if (i + 1 == slen) |
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194 return current_path; |
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195 |
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196 if (s[i+1] == '/') |
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197 { |
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198 i += 2; |
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199 continue; |
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200 } |
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201 |
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202 if (s[i+1] == '.' && (i + 2 == slen || s[i+2] == '/')) |
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203 { |
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204 i += 2; |
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205 |
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206 if (i != slen) |
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207 i++; |
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208 |
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209 pathname_backup (current_path, 1); |
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210 |
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211 continue; |
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212 } |
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213 } |
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214 |
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215 size_t tmp = s.find ('/', i); |
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216 |
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217 if (tmp == NPOS) |
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218 { |
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219 current_path.append (s, i, tmp-i); |
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220 break; |
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221 } |
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222 else |
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223 { |
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224 current_path.append (s, i, tmp-i+1); |
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225 i = tmp + 1; |
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226 } |
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227 } |
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228 |
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229 return current_path; |
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230 } |
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231 |
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232 // Return a consed string which is the current working directory. |
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233 // FOR_WHOM is the name of the caller for error printing. |
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234 |
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235 string |
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236 get_working_directory (const string& for_whom) |
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237 { |
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238 if (! follow_symbolic_links) |
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239 the_current_working_directory = ""; |
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240 |
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241 if (the_current_working_directory.empty ()) |
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242 { |
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243 the_current_working_directory = octave_getcwd (); |
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244 |
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245 if (the_current_working_directory.empty ()) |
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246 warning ("%s: can't find current directory!", for_whom.c_str ()); |
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247 } |
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248 |
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249 return the_current_working_directory; |
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250 } |
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251 |
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252 // Do the work of changing to the directory NEWDIR. Handle symbolic |
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253 // link following, etc. |
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254 |
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255 static int |
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256 change_to_directory (const string& newdir) |
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257 { |
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258 string tmp; |
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259 |
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260 if (follow_symbolic_links) |
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261 { |
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262 if (the_current_working_directory.empty ()) |
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263 get_working_directory ("cd_links"); |
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264 |
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265 if (the_current_working_directory.empty ()) |
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266 tmp = newdir; |
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267 else |
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268 tmp = make_absolute (newdir, the_current_working_directory); |
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269 |
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270 // Get rid of trailing `/'. |
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271 |
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272 size_t len = tmp.length (); |
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273 |
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274 if (len > 1) |
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275 { |
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276 if (tmp[--len] == '/') |
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277 tmp.resize (len); |
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278 } |
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279 |
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280 if (octave_chdir (tmp) < 0) |
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281 return 0; |
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282 else |
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283 { |
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284 the_current_working_directory = tmp; |
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285 return 1; |
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286 } |
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287 } |
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288 else |
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289 return (octave_chdir (newdir) < 0) ? 0 : 1; |
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290 } |
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291 |
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292 static int |
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293 octave_change_to_directory (const string& newdir) |
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294 { |
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295 int cd_ok = change_to_directory (newdir); |
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296 |
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297 if (cd_ok) |
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298 do_external_plotter_cd (newdir); |
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299 else |
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300 error ("%s: %s", newdir.c_str (), strerror (errno)); |
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301 |
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302 return cd_ok; |
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303 } |
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304 |
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305 DEFUN_TEXT ("cd", Fcd, Scd, 10, |
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306 "cd [dir]\n\ |
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307 \n\ |
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308 change current working directory\n\ |
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309 if no arguments are given, the current directory is changed to the\n\ |
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310 users home directory") |
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311 { |
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312 Octave_object retval; |
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313 |
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314 int argc = args.length () + 1; |
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315 |
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316 string_vector argv = make_argv (args, "cd"); |
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317 |
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318 if (error_state) |
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319 return retval; |
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320 |
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321 if (argc > 1) |
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322 { |
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323 string dirname = oct_tilde_expand (argv[1]); |
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324 |
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325 if (dirname.length () > 0 |
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326 && ! octave_change_to_directory (dirname)) |
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327 { |
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328 return retval; |
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329 } |
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330 } |
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331 else |
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332 { |
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333 if (home_directory.empty () |
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334 || ! octave_change_to_directory (home_directory)) |
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335 { |
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336 return retval; |
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337 } |
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338 } |
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339 |
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340 string directory = get_working_directory ("cd"); |
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341 tree_constant *dir = new tree_constant (directory); |
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342 bind_builtin_variable ("PWD", dir, 1); |
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343 |
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344 return retval; |
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345 } |
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346 |
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611
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347 DEFALIAS (chdir, cd); |
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348 |
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661
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349 // Get a directory listing. |
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350 |
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351 DEFUN_TEXT ("ls", Fls, Sls, 10, |
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352 "ls [options]\n\ |
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353 \n\ |
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354 print a directory listing") |
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355 { |
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356 Octave_object retval; |
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357 |
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358 int argc = args.length () + 1; |
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359 |
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360 string_vector argv = make_argv (args, "ls"); |
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361 |
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362 if (error_state) |
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363 return retval; |
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364 |
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365 ostrstream ls_buf; |
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366 |
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367 ls_buf << "ls -C "; |
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368 for (int i = 1; i < argc; i++) |
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369 ls_buf << oct_tilde_expand (argv[i]) << " "; |
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370 |
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371 ls_buf << ends; |
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372 char *ls_command = ls_buf.str (); |
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373 |
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374 iprocstream *cmd = new iprocstream (ls_command); |
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523
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375 |
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1469
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376 delete [] ls_command; |
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377 |
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378 add_unwind_protect (cleanup_iprocstream, cmd); |
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379 |
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380 if (cmd && *cmd) |
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381 { |
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382 int ch; |
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383 ostrstream output_buf; |
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384 while ((ch = cmd->get ()) != EOF) |
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385 output_buf << (char) ch; |
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386 output_buf << ends; |
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387 |
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388 maybe_page_output (output_buf); |
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389 } |
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390 else |
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391 error ("couldn't start process for ls!"); |
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392 |
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393 run_unwind_protect (); |
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394 |
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395 return retval; |
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396 } |
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397 |
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549
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398 DEFALIAS (dir, ls); |
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399 |
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400 DEFUN ("pwd", Fpwd, Spwd, 01, |
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523
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401 "pwd (): print current working directory") |
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402 { |
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403 Octave_object retval; |
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1755
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404 string directory; |
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523
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405 |
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406 if (verbatim_pwd) |
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407 { |
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1755
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408 directory = octave_getcwd (); |
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523
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409 |
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1755
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410 if (directory.empty ()) |
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411 warning ("pwd: can't find working directory!"); |
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523
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412 } |
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413 else |
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1755
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414 directory = get_working_directory ("pwd"); |
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523
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415 |
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1755
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416 if (! directory.empty ()) |
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523
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417 { |
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1592
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418 if (nargout == 0) |
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419 { |
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420 ostrstream output_buf; |
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421 output_buf << directory << "\n" << ends; |
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422 maybe_page_output (output_buf); |
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423 } |
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424 else |
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425 retval = directory; |
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523
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426 } |
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1592
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427 |
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523
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428 return retval; |
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429 } |
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430 |
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1488
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431 DEFUN ("readdir", Freaddir, Sreaddir, 10, |
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1389
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432 "readdir (NAME)\n\ |
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433 \n\ |
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434 Return an array of strings containing the list of all files in the |
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1401
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435 named directory. If sucessful, returns 0; otherwise an error message |
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436 is printed.") |
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1389
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437 { |
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438 Octave_object retval; |
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439 |
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1401
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440 if (args.length () == 1) |
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1389
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441 { |
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1755
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442 string dirname = args(0).string_value (); |
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1389
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443 |
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1401
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444 if (error_state) |
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1781
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445 gripe_wrong_type_arg ("readdir", args(0)); |
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1401
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446 else |
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447 { |
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1781
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448 dir_entry dir (oct_tilde_expand (dirname)); |
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1389
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449 |
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1401
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450 if (dir) |
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1389
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451 { |
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1781
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452 string_vector dirlist = dir.read (); |
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453 retval(0) = dirlist.qsort (); |
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1401
|
454 } |
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455 else |
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456 { |
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1781
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457 string msg = dir.error (); |
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458 error ("%s", msg.c_str ()); |
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1401
|
459 } |
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1389
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460 } |
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461 } |
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462 else |
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463 print_usage ("readdir"); |
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464 |
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1401
|
465 return retval; |
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|
466 } |
|
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467 |
|
|
468 // XXX FIXME XXX -- should probably also allow second arg to specify |
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|
469 // mode. |
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470 |
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1488
|
471 DEFUN ("mkdir", Fmkdir, Smkdir, 10, |
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1401
|
472 "mkdir (NAME)\n\ |
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473 \n\ |
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|
474 Create the directory named by NAME. If successful, returns 0;\n\ |
|
|
475 otherwise prints an error message.") |
|
|
476 { |
|
|
477 Octave_object retval; |
|
|
478 |
|
|
479 int status = 0; |
|
|
480 |
|
|
481 if (args.length () == 1) |
|
|
482 { |
|
1755
|
483 string dirname = args(0).string_value (); |
|
1401
|
484 |
|
|
485 if (error_state) |
|
1402
|
486 gripe_wrong_type_arg ("mkdir", args(0)); |
|
1489
|
487 else |
|
1401
|
488 { |
|
1773
|
489 int mkdir_retval = oct_mkdir (oct_tilde_expand (dirname), 0777); |
|
1489
|
490 |
|
|
491 if (mkdir_retval < 0) |
|
|
492 { |
|
|
493 status = -1; |
|
|
494 error ("%s", strerror (errno)); |
|
|
495 } |
|
1401
|
496 } |
|
|
497 } |
|
|
498 else |
|
|
499 print_usage ("mkdir"); |
|
|
500 |
|
|
501 if (status == 0) |
|
1389
|
502 retval (0) = (double) status; |
|
1401
|
503 |
|
|
504 return retval; |
|
|
505 } |
|
|
506 |
|
1488
|
507 DEFUN ("rmdir", Frmdir, Srmdir, 10, |
|
1401
|
508 "rmdir (NAME)\n\ |
|
|
509 \n\ |
|
|
510 Remove the directory named by NAME. If successful, returns 0;\n\ |
|
|
511 otherwise prints an error message.") |
|
|
512 { |
|
|
513 Octave_object retval; |
|
|
514 |
|
|
515 int status = 0; |
|
|
516 |
|
|
517 if (args.length () == 1) |
|
|
518 { |
|
1755
|
519 string dirname = args(0).string_value (); |
|
1401
|
520 |
|
|
521 if (error_state) |
|
1402
|
522 gripe_wrong_type_arg ("rmdir", args(0)); |
|
1489
|
523 else |
|
1401
|
524 { |
|
1773
|
525 int rmdir_retval = oct_rmdir (oct_tilde_expand (dirname)); |
|
1489
|
526 |
|
|
527 if (rmdir_retval < 0) |
|
|
528 { |
|
|
529 status = -1; |
|
|
530 error ("%s", strerror (errno)); |
|
|
531 } |
|
1401
|
532 } |
|
|
533 } |
|
1389
|
534 else |
|
1401
|
535 print_usage ("rmdir"); |
|
|
536 |
|
|
537 if (status == 0) |
|
|
538 retval (0) = (double) status; |
|
|
539 |
|
|
540 return retval; |
|
|
541 } |
|
|
542 |
|
1488
|
543 DEFUN ("rename", Frename, Srename, 10, |
|
1401
|
544 "rename (FROM, TO)\n\ |
|
|
545 \n\ |
|
|
546 Rename a file. If successful, returns 0;\n\ |
|
|
547 otherwise prints an error message and returns -1.") |
|
|
548 { |
|
|
549 Octave_object retval; |
|
|
550 |
|
|
551 int status = 0; |
|
|
552 |
|
|
553 if (args.length () == 2) |
|
|
554 { |
|
1755
|
555 string from = args(0).string_value (); |
|
1728
|
556 |
|
1401
|
557 if (error_state) |
|
1402
|
558 gripe_wrong_type_arg ("rename", args(0)); |
|
|
559 else |
|
1401
|
560 { |
|
1755
|
561 string to = args(1).string_value (); |
|
1728
|
562 |
|
1402
|
563 if (error_state) |
|
|
564 gripe_wrong_type_arg ("rename", args(1)); |
|
1773
|
565 else if (oct_rename (from, to) < 0) |
|
1402
|
566 { |
|
|
567 status = -1; |
|
|
568 error ("%s", strerror (errno)); |
|
|
569 } |
|
1401
|
570 } |
|
|
571 } |
|
|
572 else |
|
|
573 print_usage ("rename"); |
|
|
574 |
|
|
575 if (status == 0) |
|
|
576 retval (0) = (double) status; |
|
1389
|
577 |
|
|
578 return retval; |
|
|
579 } |
|
|
580 |
|
523
|
581 /* |
|
|
582 ;;; Local Variables: *** |
|
|
583 ;;; mode: C++ *** |
|
|
584 ;;; page-delimiter: "^/\\*" *** |
|
|
585 ;;; End: *** |
|
|
586 */ |
