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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 absolute_program 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 <strstream.h> |
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48 |
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49 #include <readline/tilde.h> |
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50 |
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51 #include "defun.h" |
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52 #include "dirfns.h" |
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53 #include "error.h" |
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54 #include "gripes.h" |
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55 #include "help.h" |
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56 #include "oct-obj.h" |
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57 #include "oct-str.h" |
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58 #include "octave.h" |
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59 #include "pager.h" |
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60 #include "pathlen.h" |
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61 #include "procstream.h" |
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62 #include "statdefs.h" |
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63 #include "sysdep.h" |
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64 #include "sysdir.h" |
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65 #include "tree-const.h" |
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66 #include "tree-plot.h" |
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67 #include "unwind-prot.h" |
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68 #include "utils.h" |
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69 |
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70 // Temp storage for a path. |
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71 static char tdir[MAXPATHLEN]; |
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72 |
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73 // Non-zero means follow symbolic links that point to directories just |
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74 // as if they are real directories. |
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75 static int follow_symbolic_links = 1; |
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76 |
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77 // Non-zero means that pwd always give verbatim directory, regardless |
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78 // of symbolic link following. |
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79 static int verbatim_pwd = 1; |
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80 |
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81 // Remove the last N directories from PATH. Do not PATH blank. |
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82 // PATH must contain enough space for MAXPATHLEN characters. |
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83 |
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84 void |
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85 pathname_backup (char *path, int n) |
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86 { |
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87 register char *p; |
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88 |
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89 if (! *path) |
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90 return; |
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91 |
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92 p = path + (strlen (path) - 1); |
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93 |
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94 while (n--) |
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95 { |
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96 while (*p == '/' && p != path) |
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97 p--; |
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98 |
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99 while (*p != '/' && p != path) |
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100 p--; |
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101 |
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102 *++p = '\0'; |
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103 } |
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104 } |
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105 |
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106 // Return a pretty pathname. If the first part of the pathname is the |
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107 // same as $HOME, then replace that with `~'. |
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108 |
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109 char * |
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110 polite_directory_format (char *name) |
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111 { |
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112 int l = home_directory ? strlen (home_directory) : 0; |
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113 |
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114 if (l > 1 && strncmp (home_directory, name, l) == 0 |
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115 && (! name[l] || name[l] == '/')) |
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116 { |
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117 strcpy (tdir + 1, name + l); |
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118 tdir[0] = '~'; |
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119 return (tdir); |
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120 } |
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121 else |
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122 return name; |
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123 } |
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124 |
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125 // Return 1 if STRING contains an absolute pathname, else 0. |
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126 |
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127 int |
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128 absolute_pathname (const char *string) |
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129 { |
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130 if (! string || ! *string) |
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131 return 0; |
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132 |
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133 if (*string == '/') |
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134 return 1; |
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135 |
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136 if (*string++ == '.') |
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137 { |
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138 if ((! *string) || *string == '/') |
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139 return 1; |
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140 |
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141 if (*string++ == '.') |
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142 if (! *string || *string == '/') |
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143 return 1; |
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144 } |
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145 return 0; |
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146 } |
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147 |
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148 // Return 1 if STRING is an absolute program name; it is absolute if |
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149 // it contains any slashes. This is used to decide whether or not to |
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150 // look up through $PATH. |
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151 |
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152 int |
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153 absolute_program (const char *string) |
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154 { |
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155 return (strchr (string, '/') != 0); |
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156 } |
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157 |
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158 // Return the `basename' of the pathname in STRING (the stuff after |
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159 // the last '/'). If STRING is not a full pathname, simply return it. |
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160 |
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161 char * |
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162 base_pathname (char *string) |
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163 { |
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164 char *p = strrchr (string, '/'); |
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165 |
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166 if (! absolute_pathname (string)) |
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167 return (string); |
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168 |
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169 if (p) |
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170 return (++p); |
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171 else |
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172 return (string); |
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173 } |
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174 |
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661
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175 // Turn STRING (a pathname) into an absolute pathname, assuming that |
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176 // DOT_PATH contains the symbolic location of '.'. This always |
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177 // returns a new string, even if STRING was an absolute pathname to |
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178 // begin with. |
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179 |
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180 char * |
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181 make_absolute (const char *string, const char *dot_path) |
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182 { |
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183 static char current_path[MAXPATHLEN]; |
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184 register char *cp; |
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185 |
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186 if (! dot_path || *string == '/') |
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187 return strsave (string); |
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188 |
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189 strcpy (current_path, dot_path); |
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190 |
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191 if (! current_path[0]) |
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192 strcpy (current_path, "./"); |
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193 |
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194 cp = current_path + (strlen (current_path) - 1); |
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195 |
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196 if (*cp++ != '/') |
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197 *cp++ = '/'; |
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198 |
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199 *cp = '\0'; |
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200 |
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201 while (*string) |
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202 { |
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203 if (*string == '.') |
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204 { |
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205 if (! string[1]) |
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206 return strsave (current_path); |
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207 |
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208 if (string[1] == '/') |
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209 { |
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210 string += 2; |
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211 continue; |
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212 } |
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213 |
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214 if (string[1] == '.' && (string[2] == '/' || ! string[2])) |
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215 { |
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216 string += 2; |
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217 |
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218 if (*string) |
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219 string++; |
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220 |
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221 pathname_backup (current_path, 1); |
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222 cp = current_path + strlen (current_path); |
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223 continue; |
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224 } |
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225 } |
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226 |
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227 while (*string && *string != '/') |
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228 *cp++ = *string++; |
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229 |
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230 if (*string) |
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231 *cp++ = *string++; |
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232 |
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233 *cp = '\0'; |
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234 } |
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235 return strsave (current_path); |
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236 } |
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237 |
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661
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238 // Has file `A' been modified after time `T'? |
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239 // |
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240 // case: |
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241 // |
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242 // a newer than t returns 1 |
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243 // a older than t returns 0 |
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244 // stat on a fails returns -1 |
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245 |
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246 int |
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247 is_newer (const char *fa, time_t t) |
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248 { |
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249 struct stat fa_sb; |
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250 register int fa_stat; |
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251 register int status = 0; |
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252 |
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253 fa_stat = stat (fa, &fa_sb); |
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254 if (fa_stat != 0) |
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255 status = -1; |
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256 |
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257 if (status != 0) |
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258 return status; |
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259 |
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260 return (fa_sb.st_mtime > t); |
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261 } |
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262 |
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263 // Return a consed string which is the current working directory. |
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264 // FOR_WHOM is the name of the caller for error printing. |
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265 |
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266 char * |
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267 get_working_directory (const char *for_whom) |
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268 { |
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269 if (! follow_symbolic_links) |
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270 { |
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271 if (the_current_working_directory) |
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272 delete [] the_current_working_directory; |
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273 |
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274 the_current_working_directory = 0; |
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275 } |
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276 |
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277 if (! the_current_working_directory) |
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278 { |
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279 char *directory; |
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280 |
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281 the_current_working_directory = new char [MAXPATHLEN]; |
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282 directory = octave_getcwd (the_current_working_directory, MAXPATHLEN); |
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283 if (! directory) |
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284 { |
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285 message (for_whom, the_current_working_directory); |
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286 delete [] the_current_working_directory; |
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287 the_current_working_directory = 0; |
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288 return 0; |
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289 } |
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290 } |
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291 |
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292 return the_current_working_directory; |
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293 } |
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294 |
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661
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295 // Do the work of changing to the directory NEWDIR. Handle symbolic |
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296 // link following, etc. |
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297 |
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298 static int |
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299 change_to_directory (const char *newdir) |
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300 { |
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301 char *t; |
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302 |
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303 if (follow_symbolic_links) |
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304 { |
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305 if (! the_current_working_directory) |
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306 get_working_directory ("cd_links"); |
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307 |
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308 if (the_current_working_directory) |
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309 t = make_absolute (newdir, the_current_working_directory); |
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310 else |
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311 t = strsave (newdir); |
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312 |
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313 // Get rid of trailing `/'. |
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314 |
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523
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315 { |
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316 register int len_t = strlen (t); |
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317 if (len_t > 1) |
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318 { |
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319 --len_t; |
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320 if (t[len_t] == '/') |
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321 t[len_t] = '\0'; |
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322 } |
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323 } |
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324 |
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1111
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325 if (octave_chdir (t) < 0) |
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523
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326 { |
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327 delete [] t; |
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328 return 0; |
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329 } |
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330 |
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331 if (the_current_working_directory) |
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332 strcpy (the_current_working_directory, t); |
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333 |
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334 delete [] t; |
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335 return 1; |
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336 } |
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337 else |
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338 { |
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1111
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339 if (octave_chdir (newdir) < 0) |
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340 return 0; |
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341 else |
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342 return 1; |
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343 } |
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344 } |
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345 |
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1328
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346 static int |
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347 octave_change_to_directory (const char *newdir) |
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348 { |
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349 int cd_ok = change_to_directory (newdir); |
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350 |
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351 if (cd_ok) |
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352 do_external_plotter_cd (newdir); |
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353 else |
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354 error ("%s: %s", newdir, strerror (errno)); |
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355 |
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356 return cd_ok; |
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357 } |
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358 |
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523
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359 DEFUN_TEXT ("cd", Fcd, Scd, 2, 1, |
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360 "cd [dir]\n\ |
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361 \n\ |
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362 change current working directory\n\ |
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363 if no arguments are given, the current directory is changed to the\n\ |
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364 users home directory") |
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365 { |
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366 Octave_object retval; |
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367 |
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368 DEFINE_ARGV("cd"); |
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369 |
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370 if (argc > 1) |
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371 { |
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372 static char *dirname = 0; |
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373 |
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374 if (dirname) |
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375 free (dirname); |
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376 |
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377 dirname = tilde_expand (argv[1]); |
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378 |
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379 if (dirname && ! octave_change_to_directory (dirname)) |
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523
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380 { |
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381 DELETE_ARGV; |
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382 return retval; |
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383 } |
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384 } |
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385 else |
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386 { |
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1328
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387 if (! home_directory || ! octave_change_to_directory (home_directory)) |
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523
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388 { |
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389 DELETE_ARGV; |
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390 return retval; |
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391 } |
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392 } |
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393 |
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394 char *directory = get_working_directory ("cd"); |
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395 tree_constant *dir = new tree_constant (directory); |
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396 bind_builtin_variable ("PWD", dir, 1); |
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397 |
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398 DELETE_ARGV; |
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399 |
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400 return retval; |
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401 } |
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402 |
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611
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403 DEFALIAS (chdir, cd); |
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404 |
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661
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405 // Get a directory listing. |
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406 |
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523
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407 DEFUN_TEXT ("ls", Fls, Sls, -1, 1, |
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408 "ls [options]\n\ |
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409 \n\ |
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410 print a directory listing") |
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411 { |
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412 Octave_object retval; |
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413 |
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414 DEFINE_ARGV("ls"); |
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415 |
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416 ostrstream ls_buf; |
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417 |
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418 ls_buf << "ls -C "; |
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419 for (int i = 1; i < argc; i++) |
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1158
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420 { |
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421 char *tmp = tilde_expand (argv[i]); |
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422 ls_buf << tmp << " "; |
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423 free (tmp); |
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424 } |
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523
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425 |
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426 ls_buf << ends; |
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1449
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427 char *ls_command = ls_buf.str (); |
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523
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428 |
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1449
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429 iprocstream *cmd = new iprocstream (ls_command); |
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523
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430 |
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1469
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431 delete [] ls_command; |
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432 |
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1449
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433 add_unwind_protect (cleanup_iprocstream, cmd); |
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523
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434 |
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1449
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435 if (cmd && *cmd) |
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436 { |
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437 int ch; |
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438 ostrstream output_buf; |
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439 while ((ch = cmd->get ()) != EOF) |
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440 output_buf << (char) ch; |
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441 output_buf << ends; |
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523
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442 |
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1449
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443 maybe_page_output (output_buf); |
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444 } |
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445 else |
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446 error ("couldn't start process for ls!"); |
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523
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447 |
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1449
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448 run_unwind_protect (); |
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523
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449 |
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450 DELETE_ARGV; |
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451 |
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452 return retval; |
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453 } |
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454 |
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549
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455 DEFALIAS (dir, ls); |
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456 |
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523
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457 DEFUN ("pwd", Fpwd, Spwd, 1, 0, |
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458 "pwd (): print current working directory") |
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459 { |
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460 Octave_object retval; |
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461 char *directory; |
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462 |
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463 if (verbatim_pwd) |
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464 { |
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465 char *buffer = new char [MAXPATHLEN]; |
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1111
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466 directory = octave_getcwd (buffer, MAXPATHLEN); |
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523
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467 |
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468 if (!directory) |
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469 { |
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470 warning ("pwd: can't find working directory!"); |
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|
471 delete buffer; |
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472 } |
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473 } |
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474 else |
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475 { |
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476 directory = get_working_directory ("pwd"); |
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477 } |
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478 |
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479 if (directory) |
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480 { |
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481 char *s = strconcat (directory, "\n"); |
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482 retval = s; |
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483 delete [] s; |
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484 } |
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485 return retval; |
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486 } |
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487 |
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1389
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488 DEFUN ("readdir", Freaddir, Sreaddir, 1, 0, |
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|
489 "readdir (NAME)\n\ |
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|
490 \n\ |
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|
491 Return an array of strings containing the list of all files in the |
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1401
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492 named directory. If sucessful, returns 0; otherwise an error message |
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|
493 is printed.") |
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1389
|
494 { |
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|
495 Octave_object retval; |
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|
496 Octave_str_obj dirlist; |
|
|
497 int status = 0; |
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|
498 |
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1401
|
499 if (args.length () == 1) |
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1389
|
500 { |
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|
501 const char *dirname = args(0).string_value (); |
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|
502 |
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1401
|
503 if (error_state) |
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1389
|
504 { |
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1401
|
505 status = -1; |
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1402
|
506 gripe_wrong_type_arg ("readdir", args(0)); |
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1401
|
507 } |
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|
508 else |
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|
509 { |
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|
510 DIR *dir = opendir (dirname); |
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1389
|
511 |
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1401
|
512 if (dir) |
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1389
|
513 { |
|
1401
|
514 int count = 0; |
|
|
515 while (readdir (dir)) |
|
|
516 count++; |
|
|
517 |
|
|
518 rewinddir (dir); |
|
|
519 |
|
|
520 dirlist.resize (count); |
|
1389
|
521 |
|
1401
|
522 struct dirent *dir_entry; |
|
|
523 while ((dir_entry = readdir (dir))) |
|
|
524 { |
|
|
525 if (--count < 0) |
|
|
526 break; |
|
|
527 |
|
|
528 dirlist (count) = dir_entry->d_name; |
|
|
529 } |
|
1389
|
530 |
|
|
531 #if defined (CLOSEDIR_VOID) |
|
1401
|
532 closedir (dir); |
|
1389
|
533 #else |
|
1401
|
534 if (closedir (dir) < 0) |
|
|
535 { |
|
|
536 status = -1; |
|
|
537 error ("%s", strerror (errno)); |
|
|
538 } |
|
1389
|
539 #endif |
|
|
540 |
|
1401
|
541 if (count != 0) |
|
|
542 { |
|
|
543 status = -1; |
|
|
544 error ("readdir: failed reading directory"); |
|
|
545 } |
|
|
546 } |
|
|
547 else |
|
|
548 { |
|
|
549 status = -1; |
|
|
550 error ("%s", strerror (errno)); |
|
|
551 } |
|
1389
|
552 } |
|
|
553 } |
|
|
554 else |
|
|
555 print_usage ("readdir"); |
|
|
556 |
|
1401
|
557 if (status == 0) |
|
|
558 retval(0) = dirlist; |
|
|
559 |
|
|
560 return retval; |
|
|
561 } |
|
|
562 |
|
|
563 // XXX FIXME XXX -- should probably also allow second arg to specify |
|
|
564 // mode. |
|
|
565 |
|
|
566 DEFUN ("mkdir", Fmkdir, Smkdir, 1, 0, |
|
|
567 "mkdir (NAME)\n\ |
|
|
568 \n\ |
|
|
569 Create the directory named by NAME. If successful, returns 0;\n\ |
|
|
570 otherwise prints an error message.") |
|
|
571 { |
|
|
572 Octave_object retval; |
|
|
573 |
|
|
574 int status = 0; |
|
|
575 |
|
|
576 if (args.length () == 1) |
|
|
577 { |
|
|
578 const char *dirname = args(0).string_value (); |
|
|
579 |
|
|
580 if (error_state) |
|
1402
|
581 gripe_wrong_type_arg ("mkdir", args(0)); |
|
1401
|
582 else if (mkdir (dirname, 0777) < 0) |
|
|
583 { |
|
|
584 status = -1; |
|
|
585 error ("%s", strerror (errno)); |
|
|
586 } |
|
|
587 } |
|
|
588 else |
|
|
589 print_usage ("mkdir"); |
|
|
590 |
|
|
591 if (status == 0) |
|
1389
|
592 retval (0) = (double) status; |
|
1401
|
593 |
|
|
594 return retval; |
|
|
595 } |
|
|
596 |
|
|
597 DEFUN ("rmdir", Frmdir, Srmdir, 1, 0, |
|
|
598 "rmdir (NAME)\n\ |
|
|
599 \n\ |
|
|
600 Remove the directory named by NAME. If successful, returns 0;\n\ |
|
|
601 otherwise prints an error message.") |
|
|
602 { |
|
|
603 Octave_object retval; |
|
|
604 |
|
|
605 int status = 0; |
|
|
606 |
|
|
607 if (args.length () == 1) |
|
|
608 { |
|
|
609 const char *dirname = args(0).string_value (); |
|
|
610 |
|
|
611 if (error_state) |
|
1402
|
612 gripe_wrong_type_arg ("rmdir", args(0)); |
|
1401
|
613 else if (rmdir (dirname) < 0) |
|
|
614 { |
|
|
615 status = -1; |
|
|
616 error ("%s", strerror (errno)); |
|
|
617 } |
|
|
618 } |
|
1389
|
619 else |
|
1401
|
620 print_usage ("rmdir"); |
|
|
621 |
|
|
622 if (status == 0) |
|
|
623 retval (0) = (double) status; |
|
|
624 |
|
|
625 return retval; |
|
|
626 } |
|
|
627 |
|
|
628 DEFUN ("rename", Frename, Srename, 1, 0, |
|
|
629 "rename (FROM, TO)\n\ |
|
|
630 \n\ |
|
|
631 Rename a file. If successful, returns 0;\n\ |
|
|
632 otherwise prints an error message and returns -1.") |
|
|
633 { |
|
|
634 Octave_object retval; |
|
|
635 |
|
|
636 int status = 0; |
|
|
637 |
|
|
638 if (args.length () == 2) |
|
|
639 { |
|
|
640 const char *from = args(0).string_value (); |
|
|
641 if (error_state) |
|
1402
|
642 gripe_wrong_type_arg ("rename", args(0)); |
|
|
643 else |
|
1401
|
644 { |
|
1402
|
645 const char *to = args(1).string_value (); |
|
|
646 if (error_state) |
|
|
647 gripe_wrong_type_arg ("rename", args(1)); |
|
|
648 else if (rename (from, to) < 0) |
|
|
649 { |
|
|
650 status = -1; |
|
|
651 error ("%s", strerror (errno)); |
|
|
652 } |
|
1401
|
653 } |
|
|
654 } |
|
|
655 else |
|
|
656 print_usage ("rename"); |
|
|
657 |
|
|
658 if (status == 0) |
|
|
659 retval (0) = (double) status; |
|
1389
|
660 |
|
|
661 return retval; |
|
|
662 } |
|
|
663 |
|
523
|
664 /* |
|
|
665 ;;; Local Variables: *** |
|
|
666 ;;; mode: C++ *** |
|
|
667 ;;; page-delimiter: "^/\\*" *** |
|
|
668 ;;; End: *** |
|
|
669 */ |
