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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 "defun.h" |
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50 #include "dirfns.h" |
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51 #include "error.h" |
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52 #include "gripes.h" |
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53 #include "help.h" |
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54 #include "oct-obj.h" |
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55 #include "oct-str.h" |
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56 #include "octave.h" |
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57 #include "pager.h" |
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58 #include "pathlen.h" |
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59 #include "procstream.h" |
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60 #include "statdefs.h" |
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61 #include "sysdep.h" |
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62 #include "sysdir.h" |
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63 #include "tree-const.h" |
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64 #include "tree-plot.h" |
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65 #include "unwind-prot.h" |
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66 #include "utils.h" |
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67 |
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68 extern "C" |
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69 { |
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70 #include <readline/tilde.h> |
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71 extern char *strerror (int); |
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72 } |
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73 |
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74 // Temp storage for a path. |
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75 static char tdir[MAXPATHLEN]; |
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76 |
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77 // Non-zero means follow symbolic links that point to directories just |
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78 // as if they are real directories. |
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79 static int follow_symbolic_links = 1; |
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80 |
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81 // Non-zero means that pwd always give verbatim directory, regardless |
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82 // of symbolic link following. |
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83 static int verbatim_pwd = 1; |
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84 |
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85 // Remove the last N directories from PATH. Do not PATH blank. |
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86 // PATH must contain enough space for MAXPATHLEN characters. |
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87 |
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88 void |
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89 pathname_backup (char *path, int n) |
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90 { |
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91 register char *p; |
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92 |
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93 if (! *path) |
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94 return; |
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95 |
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96 p = path + (strlen (path) - 1); |
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97 |
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98 while (n--) |
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99 { |
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100 while (*p == '/' && p != path) |
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101 p--; |
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102 |
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103 while (*p != '/' && p != path) |
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104 p--; |
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105 |
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106 *++p = '\0'; |
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107 } |
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108 } |
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109 |
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110 // Return a pretty pathname. If the first part of the pathname is the |
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111 // same as $HOME, then replace that with `~'. |
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112 |
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113 char * |
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114 polite_directory_format (char *name) |
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115 { |
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116 int l = home_directory ? strlen (home_directory) : 0; |
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117 |
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118 if (l > 1 && strncmp (home_directory, name, l) == 0 |
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119 && (! name[l] || name[l] == '/')) |
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120 { |
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121 strcpy (tdir + 1, name + l); |
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122 tdir[0] = '~'; |
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123 return (tdir); |
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124 } |
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125 else |
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126 return name; |
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127 } |
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128 |
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129 // Return 1 if STRING contains an absolute pathname, else 0. |
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130 |
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131 int |
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132 absolute_pathname (const char *string) |
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133 { |
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134 if (! string || ! *string) |
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135 return 0; |
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136 |
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137 if (*string == '/') |
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138 return 1; |
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139 |
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140 if (*string++ == '.') |
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141 { |
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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 if (*string++ == '.') |
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146 if (! *string || *string == '/') |
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147 return 1; |
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148 } |
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149 return 0; |
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150 } |
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151 |
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152 // Return 1 if STRING is an absolute program name; it is absolute if |
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153 // it contains any slashes. This is used to decide whether or not to |
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154 // look up through $PATH. |
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155 |
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156 int |
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157 absolute_program (const char *string) |
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158 { |
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159 return (strchr (string, '/') != 0); |
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160 } |
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161 |
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162 // Return the `basename' of the pathname in STRING (the stuff after |
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163 // the last '/'). If STRING is not a full pathname, simply return it. |
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164 |
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165 char * |
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166 base_pathname (char *string) |
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167 { |
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168 char *p = strrchr (string, '/'); |
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169 |
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170 if (! absolute_pathname (string)) |
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171 return (string); |
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172 |
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173 if (p) |
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174 return (++p); |
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175 else |
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176 return (string); |
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177 } |
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178 |
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179 // Turn STRING (a pathname) into an absolute pathname, assuming that |
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180 // DOT_PATH contains the symbolic location of '.'. This always |
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181 // returns a new string, even if STRING was an absolute pathname to |
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182 // begin with. |
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183 |
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184 char * |
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185 make_absolute (const char *string, const char *dot_path) |
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186 { |
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187 static char current_path[MAXPATHLEN]; |
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188 register char *cp; |
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189 |
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190 if (! dot_path || *string == '/') |
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191 return strsave (string); |
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192 |
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193 strcpy (current_path, dot_path); |
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194 |
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195 if (! current_path[0]) |
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196 strcpy (current_path, "./"); |
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197 |
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198 cp = current_path + (strlen (current_path) - 1); |
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199 |
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200 if (*cp++ != '/') |
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201 *cp++ = '/'; |
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202 |
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203 *cp = '\0'; |
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204 |
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205 while (*string) |
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206 { |
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207 if (*string == '.') |
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208 { |
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209 if (! string[1]) |
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210 return strsave (current_path); |
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211 |
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212 if (string[1] == '/') |
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213 { |
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214 string += 2; |
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215 continue; |
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216 } |
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217 |
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218 if (string[1] == '.' && (string[2] == '/' || ! string[2])) |
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219 { |
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220 string += 2; |
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221 |
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222 if (*string) |
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223 string++; |
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224 |
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225 pathname_backup (current_path, 1); |
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226 cp = current_path + strlen (current_path); |
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227 continue; |
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228 } |
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229 } |
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230 |
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231 while (*string && *string != '/') |
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232 *cp++ = *string++; |
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233 |
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234 if (*string) |
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235 *cp++ = *string++; |
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236 |
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237 *cp = '\0'; |
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238 } |
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239 return strsave (current_path); |
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240 } |
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241 |
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661
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242 // Has file `A' been modified after time `T'? |
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243 // |
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244 // case: |
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245 // |
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246 // a newer than t returns 1 |
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247 // a older than t returns 0 |
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248 // stat on a fails returns -1 |
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249 |
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250 int |
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251 is_newer (const char *fa, time_t t) |
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252 { |
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253 struct stat fa_sb; |
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254 register int fa_stat; |
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255 register int status = 0; |
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256 |
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257 fa_stat = stat (fa, &fa_sb); |
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258 if (fa_stat != 0) |
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259 status = -1; |
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260 |
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261 if (status != 0) |
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262 return status; |
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263 |
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264 return (fa_sb.st_mtime > t); |
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265 } |
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266 |
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267 // Return a consed string which is the current working directory. |
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268 // FOR_WHOM is the name of the caller for error printing. |
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269 |
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270 char * |
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271 get_working_directory (const char *for_whom) |
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272 { |
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273 if (! follow_symbolic_links) |
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274 { |
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275 if (the_current_working_directory) |
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276 delete [] the_current_working_directory; |
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277 |
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278 the_current_working_directory = 0; |
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279 } |
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280 |
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281 if (! the_current_working_directory) |
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282 { |
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283 char *directory; |
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284 |
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285 the_current_working_directory = new char [MAXPATHLEN]; |
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286 directory = octave_getcwd (the_current_working_directory, MAXPATHLEN); |
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287 if (! directory) |
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288 { |
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289 message (for_whom, the_current_working_directory); |
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290 delete [] the_current_working_directory; |
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291 the_current_working_directory = 0; |
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292 return 0; |
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293 } |
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294 } |
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295 |
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296 return the_current_working_directory; |
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297 } |
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298 |
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661
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299 // Do the work of changing to the directory NEWDIR. Handle symbolic |
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300 // link following, etc. |
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301 |
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302 static int |
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303 change_to_directory (const char *newdir) |
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304 { |
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305 char *t; |
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306 |
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307 if (follow_symbolic_links) |
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308 { |
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309 if (! the_current_working_directory) |
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310 get_working_directory ("cd_links"); |
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311 |
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312 if (the_current_working_directory) |
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313 t = make_absolute (newdir, the_current_working_directory); |
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314 else |
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315 t = strsave (newdir); |
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316 |
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317 // Get rid of trailing `/'. |
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318 |
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319 { |
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320 register int len_t = strlen (t); |
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321 if (len_t > 1) |
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322 { |
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323 --len_t; |
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324 if (t[len_t] == '/') |
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325 t[len_t] = '\0'; |
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326 } |
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327 } |
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328 |
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1111
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329 if (octave_chdir (t) < 0) |
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330 { |
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331 delete [] t; |
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332 return 0; |
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333 } |
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334 |
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335 if (the_current_working_directory) |
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336 strcpy (the_current_working_directory, t); |
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337 |
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338 delete [] t; |
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339 return 1; |
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340 } |
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341 else |
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342 { |
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1111
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343 if (octave_chdir (newdir) < 0) |
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344 return 0; |
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345 else |
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346 return 1; |
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347 } |
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348 } |
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349 |
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350 static int |
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351 octave_change_to_directory (const char *newdir) |
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352 { |
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353 int cd_ok = change_to_directory (newdir); |
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354 |
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355 if (cd_ok) |
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356 do_external_plotter_cd (newdir); |
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357 else |
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358 error ("%s: %s", newdir, strerror (errno)); |
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359 |
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360 return cd_ok; |
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361 } |
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362 |
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523
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363 DEFUN_TEXT ("cd", Fcd, Scd, 2, 1, |
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364 "cd [dir]\n\ |
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365 \n\ |
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366 change current working directory\n\ |
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367 if no arguments are given, the current directory is changed to the\n\ |
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368 users home directory") |
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369 { |
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370 Octave_object retval; |
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371 |
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372 DEFINE_ARGV("cd"); |
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373 |
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374 if (argc > 1) |
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375 { |
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376 static char *dirname = 0; |
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377 |
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378 if (dirname) |
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379 free (dirname); |
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380 |
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381 dirname = tilde_expand (argv[1]); |
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382 |
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383 if (dirname && ! octave_change_to_directory (dirname)) |
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523
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384 { |
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385 DELETE_ARGV; |
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386 return retval; |
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387 } |
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388 } |
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389 else |
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390 { |
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1328
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391 if (! home_directory || ! octave_change_to_directory (home_directory)) |
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523
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392 { |
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393 DELETE_ARGV; |
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394 return retval; |
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395 } |
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396 } |
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397 |
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398 char *directory = get_working_directory ("cd"); |
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399 tree_constant *dir = new tree_constant (directory); |
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400 bind_builtin_variable ("PWD", dir, 1); |
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401 |
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402 DELETE_ARGV; |
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403 |
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404 return retval; |
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405 } |
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406 |
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611
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407 DEFALIAS (chdir, cd); |
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408 |
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661
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409 // Get a directory listing. |
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410 |
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523
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411 DEFUN_TEXT ("ls", Fls, Sls, -1, 1, |
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412 "ls [options]\n\ |
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413 \n\ |
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414 print a directory listing") |
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415 { |
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416 Octave_object retval; |
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417 |
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418 DEFINE_ARGV("ls"); |
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419 |
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420 ostrstream ls_buf; |
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421 |
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422 ls_buf << "ls -C "; |
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423 for (int i = 1; i < argc; i++) |
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1158
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424 { |
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425 char *tmp = tilde_expand (argv[i]); |
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426 ls_buf << tmp << " "; |
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427 free (tmp); |
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428 } |
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523
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429 |
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430 ls_buf << ends; |
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1449
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431 char *ls_command = ls_buf.str (); |
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432 delete [] ls_command; |
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523
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433 |
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1449
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434 iprocstream *cmd = new iprocstream (ls_command); |
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523
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435 |
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1449
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436 add_unwind_protect (cleanup_iprocstream, cmd); |
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523
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437 |
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1449
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438 if (cmd && *cmd) |
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439 { |
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440 int ch; |
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441 ostrstream output_buf; |
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442 while ((ch = cmd->get ()) != EOF) |
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443 output_buf << (char) ch; |
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444 output_buf << ends; |
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523
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445 |
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1449
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446 maybe_page_output (output_buf); |
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447 } |
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448 else |
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449 error ("couldn't start process for ls!"); |
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523
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450 |
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1449
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451 run_unwind_protect (); |
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523
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452 |
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453 DELETE_ARGV; |
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454 |
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455 return retval; |
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456 } |
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457 |
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549
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458 DEFALIAS (dir, ls); |
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459 |
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523
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460 DEFUN ("pwd", Fpwd, Spwd, 1, 0, |
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461 "pwd (): print current working directory") |
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462 { |
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463 Octave_object retval; |
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464 char *directory; |
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465 |
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466 if (verbatim_pwd) |
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467 { |
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468 char *buffer = new char [MAXPATHLEN]; |
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1111
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469 directory = octave_getcwd (buffer, MAXPATHLEN); |
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523
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470 |
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471 if (!directory) |
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472 { |
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473 warning ("pwd: can't find working directory!"); |
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474 delete buffer; |
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475 } |
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476 } |
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477 else |
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478 { |
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479 directory = get_working_directory ("pwd"); |
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480 } |
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481 |
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482 if (directory) |
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483 { |
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484 char *s = strconcat (directory, "\n"); |
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485 retval = s; |
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486 delete [] s; |
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487 } |
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488 return retval; |
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489 } |
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490 |
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1389
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491 DEFUN ("readdir", Freaddir, Sreaddir, 1, 0, |
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|
492 "readdir (NAME)\n\ |
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|
493 \n\ |
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|
494 Return an array of strings containing the list of all files in the |
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1401
|
495 named directory. If sucessful, returns 0; otherwise an error message |
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|
496 is printed.") |
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1389
|
497 { |
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|
498 Octave_object retval; |
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|
499 Octave_str_obj dirlist; |
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|
500 int status = 0; |
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501 |
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1401
|
502 if (args.length () == 1) |
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1389
|
503 { |
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|
504 const char *dirname = args(0).string_value (); |
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|
505 |
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1401
|
506 if (error_state) |
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1389
|
507 { |
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1401
|
508 status = -1; |
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1402
|
509 gripe_wrong_type_arg ("readdir", args(0)); |
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1401
|
510 } |
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|
511 else |
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|
512 { |
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|
513 DIR *dir = opendir (dirname); |
|
1389
|
514 |
|
1401
|
515 if (dir) |
|
1389
|
516 { |
|
1401
|
517 int count = 0; |
|
|
518 while (readdir (dir)) |
|
|
519 count++; |
|
|
520 |
|
|
521 rewinddir (dir); |
|
|
522 |
|
|
523 dirlist.resize (count); |
|
1389
|
524 |
|
1401
|
525 struct dirent *dir_entry; |
|
|
526 while ((dir_entry = readdir (dir))) |
|
|
527 { |
|
|
528 if (--count < 0) |
|
|
529 break; |
|
|
530 |
|
|
531 dirlist (count) = dir_entry->d_name; |
|
|
532 } |
|
1389
|
533 |
|
|
534 #if defined (CLOSEDIR_VOID) |
|
1401
|
535 closedir (dir); |
|
1389
|
536 #else |
|
1401
|
537 if (closedir (dir) < 0) |
|
|
538 { |
|
|
539 status = -1; |
|
|
540 error ("%s", strerror (errno)); |
|
|
541 } |
|
1389
|
542 #endif |
|
|
543 |
|
1401
|
544 if (count != 0) |
|
|
545 { |
|
|
546 status = -1; |
|
|
547 error ("readdir: failed reading directory"); |
|
|
548 } |
|
|
549 } |
|
|
550 else |
|
|
551 { |
|
|
552 status = -1; |
|
|
553 error ("%s", strerror (errno)); |
|
|
554 } |
|
1389
|
555 } |
|
|
556 } |
|
|
557 else |
|
|
558 print_usage ("readdir"); |
|
|
559 |
|
1401
|
560 if (status == 0) |
|
|
561 retval(0) = dirlist; |
|
|
562 |
|
|
563 return retval; |
|
|
564 } |
|
|
565 |
|
|
566 // XXX FIXME XXX -- should probably also allow second arg to specify |
|
|
567 // mode. |
|
|
568 |
|
|
569 DEFUN ("mkdir", Fmkdir, Smkdir, 1, 0, |
|
|
570 "mkdir (NAME)\n\ |
|
|
571 \n\ |
|
|
572 Create the directory named by NAME. If successful, returns 0;\n\ |
|
|
573 otherwise prints an error message.") |
|
|
574 { |
|
|
575 Octave_object retval; |
|
|
576 |
|
|
577 int status = 0; |
|
|
578 |
|
|
579 if (args.length () == 1) |
|
|
580 { |
|
|
581 const char *dirname = args(0).string_value (); |
|
|
582 |
|
|
583 if (error_state) |
|
1402
|
584 gripe_wrong_type_arg ("mkdir", args(0)); |
|
1401
|
585 else if (mkdir (dirname, 0777) < 0) |
|
|
586 { |
|
|
587 status = -1; |
|
|
588 error ("%s", strerror (errno)); |
|
|
589 } |
|
|
590 } |
|
|
591 else |
|
|
592 print_usage ("mkdir"); |
|
|
593 |
|
|
594 if (status == 0) |
|
1389
|
595 retval (0) = (double) status; |
|
1401
|
596 |
|
|
597 return retval; |
|
|
598 } |
|
|
599 |
|
|
600 DEFUN ("rmdir", Frmdir, Srmdir, 1, 0, |
|
|
601 "rmdir (NAME)\n\ |
|
|
602 \n\ |
|
|
603 Remove the directory named by NAME. If successful, returns 0;\n\ |
|
|
604 otherwise prints an error message.") |
|
|
605 { |
|
|
606 Octave_object retval; |
|
|
607 |
|
|
608 int status = 0; |
|
|
609 |
|
|
610 if (args.length () == 1) |
|
|
611 { |
|
|
612 const char *dirname = args(0).string_value (); |
|
|
613 |
|
|
614 if (error_state) |
|
1402
|
615 gripe_wrong_type_arg ("rmdir", args(0)); |
|
1401
|
616 else if (rmdir (dirname) < 0) |
|
|
617 { |
|
|
618 status = -1; |
|
|
619 error ("%s", strerror (errno)); |
|
|
620 } |
|
|
621 } |
|
1389
|
622 else |
|
1401
|
623 print_usage ("rmdir"); |
|
|
624 |
|
|
625 if (status == 0) |
|
|
626 retval (0) = (double) status; |
|
|
627 |
|
|
628 return retval; |
|
|
629 } |
|
|
630 |
|
|
631 DEFUN ("rename", Frename, Srename, 1, 0, |
|
|
632 "rename (FROM, TO)\n\ |
|
|
633 \n\ |
|
|
634 Rename a file. If successful, returns 0;\n\ |
|
|
635 otherwise prints an error message and returns -1.") |
|
|
636 { |
|
|
637 Octave_object retval; |
|
|
638 |
|
|
639 int status = 0; |
|
|
640 |
|
|
641 if (args.length () == 2) |
|
|
642 { |
|
|
643 const char *from = args(0).string_value (); |
|
|
644 if (error_state) |
|
1402
|
645 gripe_wrong_type_arg ("rename", args(0)); |
|
|
646 else |
|
1401
|
647 { |
|
1402
|
648 const char *to = args(1).string_value (); |
|
|
649 if (error_state) |
|
|
650 gripe_wrong_type_arg ("rename", args(1)); |
|
|
651 else if (rename (from, to) < 0) |
|
|
652 { |
|
|
653 status = -1; |
|
|
654 error ("%s", strerror (errno)); |
|
|
655 } |
|
1401
|
656 } |
|
|
657 } |
|
|
658 else |
|
|
659 print_usage ("rename"); |
|
|
660 |
|
|
661 if (status == 0) |
|
|
662 retval (0) = (double) status; |
|
1389
|
663 |
|
|
664 return retval; |
|
|
665 } |
|
|
666 |
|
523
|
667 /* |
|
|
668 ;;; Local Variables: *** |
|
|
669 ;;; mode: C++ *** |
|
|
670 ;;; page-delimiter: "^/\\*" *** |
|
|
671 ;;; End: *** |
|
|
672 */ |
