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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 <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 "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 "toplev.h" |
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58 #include "pager.h" |
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59 #include "pathlen.h" |
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60 #include "procstream.h" |
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61 #include "statdefs.h" |
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62 #include "sysdep.h" |
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63 #include "sysdir.h" |
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64 #include "tree-const.h" |
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65 #include "tree-plot.h" |
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66 #include "unwind-prot.h" |
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67 #include "utils.h" |
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68 |
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69 // Temp storage for a path. |
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70 static char tdir[MAXPATHLEN]; |
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71 |
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72 // Non-zero means follow symbolic links that point to directories just |
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73 // as if they are real directories. |
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74 static int follow_symbolic_links = 1; |
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75 |
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76 // Non-zero means that pwd always give verbatim directory, regardless |
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77 // of symbolic link following. |
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78 static int verbatim_pwd = 1; |
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79 |
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80 // Remove the last N directories from PATH. Do not PATH blank. |
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81 // PATH must contain enough space for MAXPATHLEN characters. |
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82 |
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83 void |
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84 pathname_backup (char *path, int n) |
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85 { |
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86 register char *p; |
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87 |
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88 if (! *path) |
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89 return; |
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90 |
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91 p = path + (strlen (path) - 1); |
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92 |
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93 while (n--) |
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94 { |
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95 while (*p == '/' && p != path) |
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96 p--; |
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97 |
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98 while (*p != '/' && p != path) |
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99 p--; |
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100 |
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101 *++p = '\0'; |
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102 } |
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103 } |
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104 |
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105 // Return a pretty pathname. If the first part of the pathname is the |
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106 // same as $HOME, then replace that with `~'. |
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107 |
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108 char * |
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109 polite_directory_format (char *name) |
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110 { |
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111 int l = home_directory ? strlen (home_directory) : 0; |
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112 |
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113 if (l > 1 && strncmp (home_directory, name, l) == 0 |
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114 && (! name[l] || name[l] == '/')) |
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115 { |
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116 strcpy (tdir + 1, name + l); |
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117 tdir[0] = '~'; |
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118 return (tdir); |
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119 } |
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120 else |
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121 return name; |
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122 } |
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123 |
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124 // Return 1 if STRING contains an absolute pathname, else 0. |
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125 |
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126 int |
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127 absolute_pathname (const char *string) |
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128 { |
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129 if (! string || ! *string) |
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130 return 0; |
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131 |
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132 if (*string == '/') |
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133 return 1; |
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134 |
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135 if (*string++ == '.') |
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136 { |
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137 if ((! *string) || *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 if (! *string || *string == '/') |
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142 return 1; |
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143 } |
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144 return 0; |
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145 } |
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146 |
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147 // Return 1 if STRING is an absolute program name; it is absolute if |
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148 // it contains any slashes. This is used to decide whether or not to |
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149 // look up through $PATH. |
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150 |
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151 int |
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152 absolute_program (const char *string) |
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153 { |
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154 return (strchr (string, '/') != 0); |
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155 } |
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156 |
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157 // Return the `basename' of the pathname in STRING (the stuff after |
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158 // the last '/'). If STRING is not a full pathname, simply return it. |
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159 |
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160 char * |
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161 base_pathname (char *string) |
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162 { |
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163 char *p = strrchr (string, '/'); |
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164 |
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165 if (! absolute_pathname (string)) |
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166 return (string); |
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167 |
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168 if (p) |
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169 return (++p); |
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170 else |
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171 return (string); |
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172 } |
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173 |
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174 // Turn STRING (a pathname) into an absolute pathname, assuming that |
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175 // DOT_PATH contains the symbolic location of '.'. This always |
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176 // returns a new string, even if STRING was an absolute pathname to |
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177 // begin with. |
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178 |
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179 char * |
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180 make_absolute (const char *string, const char *dot_path) |
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181 { |
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182 static char current_path[MAXPATHLEN]; |
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183 register char *cp; |
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184 |
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185 if (! dot_path || *string == '/') |
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186 return strsave (string); |
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187 |
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188 strcpy (current_path, dot_path); |
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189 |
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190 if (! current_path[0]) |
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191 strcpy (current_path, "./"); |
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192 |
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193 cp = current_path + (strlen (current_path) - 1); |
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194 |
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195 if (*cp++ != '/') |
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196 *cp++ = '/'; |
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197 |
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198 *cp = '\0'; |
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199 |
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200 while (*string) |
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201 { |
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202 if (*string == '.') |
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203 { |
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204 if (! string[1]) |
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205 return strsave (current_path); |
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206 |
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207 if (string[1] == '/') |
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208 { |
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209 string += 2; |
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210 continue; |
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211 } |
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212 |
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213 if (string[1] == '.' && (string[2] == '/' || ! string[2])) |
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214 { |
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215 string += 2; |
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216 |
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217 if (*string) |
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218 string++; |
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219 |
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220 pathname_backup (current_path, 1); |
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221 cp = current_path + strlen (current_path); |
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222 continue; |
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223 } |
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224 } |
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225 |
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226 while (*string && *string != '/') |
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227 *cp++ = *string++; |
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228 |
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229 if (*string) |
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230 *cp++ = *string++; |
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231 |
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232 *cp = '\0'; |
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233 } |
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234 return strsave (current_path); |
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235 } |
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236 |
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661
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237 // Has file `A' been modified after time `T'? |
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238 // |
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239 // case: |
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240 // |
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241 // a newer than t returns 1 |
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242 // a older than t returns 0 |
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243 // stat on a fails returns -1 |
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244 |
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245 int |
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246 is_newer (const char *fa, time_t t) |
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247 { |
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248 struct stat fa_sb; |
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249 register int fa_stat; |
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250 register int status = 0; |
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251 |
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252 fa_stat = stat (fa, &fa_sb); |
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253 if (fa_stat != 0) |
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254 status = -1; |
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255 |
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256 if (status != 0) |
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257 return status; |
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258 |
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259 return (fa_sb.st_mtime > t); |
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260 } |
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261 |
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262 // Return a consed string which is the current working directory. |
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263 // FOR_WHOM is the name of the caller for error printing. |
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264 |
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265 char * |
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266 get_working_directory (const char *for_whom) |
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267 { |
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268 if (! follow_symbolic_links) |
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269 { |
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270 if (the_current_working_directory) |
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271 delete [] the_current_working_directory; |
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272 |
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273 the_current_working_directory = 0; |
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274 } |
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275 |
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276 if (! the_current_working_directory) |
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277 { |
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278 char *directory; |
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279 |
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280 the_current_working_directory = new char [MAXPATHLEN]; |
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281 directory = octave_getcwd (the_current_working_directory, MAXPATHLEN); |
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282 if (! directory) |
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283 { |
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284 message (for_whom, the_current_working_directory); |
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285 delete [] the_current_working_directory; |
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286 the_current_working_directory = 0; |
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287 return 0; |
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288 } |
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289 } |
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290 |
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291 return the_current_working_directory; |
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292 } |
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293 |
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661
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294 // Do the work of changing to the directory NEWDIR. Handle symbolic |
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295 // link following, etc. |
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296 |
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297 static int |
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298 change_to_directory (const char *newdir) |
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299 { |
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300 char *t; |
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301 |
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302 if (follow_symbolic_links) |
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303 { |
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304 if (! the_current_working_directory) |
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305 get_working_directory ("cd_links"); |
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306 |
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307 if (the_current_working_directory) |
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308 t = make_absolute (newdir, the_current_working_directory); |
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309 else |
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310 t = strsave (newdir); |
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311 |
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312 // Get rid of trailing `/'. |
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313 |
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314 { |
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315 register int len_t = strlen (t); |
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316 if (len_t > 1) |
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317 { |
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318 --len_t; |
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319 if (t[len_t] == '/') |
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320 t[len_t] = '\0'; |
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321 } |
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322 } |
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323 |
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1111
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324 if (octave_chdir (t) < 0) |
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523
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325 { |
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326 delete [] t; |
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327 return 0; |
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328 } |
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329 |
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330 if (the_current_working_directory) |
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331 strcpy (the_current_working_directory, t); |
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332 |
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333 delete [] t; |
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334 return 1; |
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335 } |
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336 else |
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337 { |
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1111
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338 if (octave_chdir (newdir) < 0) |
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523
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339 return 0; |
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340 else |
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341 return 1; |
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342 } |
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343 } |
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344 |
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345 static int |
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346 octave_change_to_directory (const char *newdir) |
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347 { |
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348 int cd_ok = change_to_directory (newdir); |
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349 |
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350 if (cd_ok) |
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351 do_external_plotter_cd (newdir); |
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352 else |
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353 error ("%s: %s", newdir, strerror (errno)); |
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354 |
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355 return cd_ok; |
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356 } |
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357 |
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1488
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358 DEFUN_TEXT ("cd", Fcd, Scd, 10, |
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523
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359 "cd [dir]\n\ |
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360 \n\ |
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361 change current working directory\n\ |
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362 if no arguments are given, the current directory is changed to the\n\ |
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363 users home directory") |
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364 { |
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365 Octave_object retval; |
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366 |
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367 DEFINE_ARGV("cd"); |
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368 |
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369 if (argc > 1) |
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370 { |
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371 static char *dirname = 0; |
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372 |
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373 if (dirname) |
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374 free (dirname); |
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375 |
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376 dirname = tilde_expand (argv[1]); |
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377 |
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1328
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378 if (dirname && ! octave_change_to_directory (dirname)) |
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523
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379 { |
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380 DELETE_ARGV; |
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381 return retval; |
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382 } |
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383 } |
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384 else |
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385 { |
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1328
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386 if (! home_directory || ! octave_change_to_directory (home_directory)) |
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523
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387 { |
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388 DELETE_ARGV; |
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389 return retval; |
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390 } |
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391 } |
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392 |
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393 char *directory = get_working_directory ("cd"); |
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394 tree_constant *dir = new tree_constant (directory); |
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395 bind_builtin_variable ("PWD", dir, 1); |
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396 |
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397 DELETE_ARGV; |
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398 |
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399 return retval; |
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400 } |
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401 |
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611
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402 DEFALIAS (chdir, cd); |
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403 |
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661
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404 // Get a directory listing. |
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405 |
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1488
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406 DEFUN_TEXT ("ls", Fls, Sls, 10, |
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523
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407 "ls [options]\n\ |
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408 \n\ |
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409 print a directory listing") |
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410 { |
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411 Octave_object retval; |
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412 |
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413 DEFINE_ARGV("ls"); |
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414 |
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415 ostrstream ls_buf; |
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416 |
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417 ls_buf << "ls -C "; |
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418 for (int i = 1; i < argc; i++) |
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1158
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419 { |
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420 char *tmp = tilde_expand (argv[i]); |
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421 ls_buf << tmp << " "; |
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422 free (tmp); |
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423 } |
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523
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424 |
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425 ls_buf << ends; |
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1449
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426 char *ls_command = ls_buf.str (); |
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523
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427 |
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1449
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428 iprocstream *cmd = new iprocstream (ls_command); |
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523
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429 |
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1469
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430 delete [] ls_command; |
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431 |
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1449
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432 add_unwind_protect (cleanup_iprocstream, cmd); |
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523
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433 |
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1449
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434 if (cmd && *cmd) |
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435 { |
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436 int ch; |
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437 ostrstream output_buf; |
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438 while ((ch = cmd->get ()) != EOF) |
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439 output_buf << (char) ch; |
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440 output_buf << ends; |
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523
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441 |
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1449
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442 maybe_page_output (output_buf); |
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443 } |
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444 else |
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445 error ("couldn't start process for ls!"); |
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523
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446 |
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1449
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447 run_unwind_protect (); |
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523
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448 |
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449 DELETE_ARGV; |
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450 |
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451 return retval; |
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452 } |
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453 |
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549
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454 DEFALIAS (dir, ls); |
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455 |
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1592
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456 DEFUN ("pwd", Fpwd, Spwd, 01, |
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523
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457 "pwd (): print current working directory") |
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458 { |
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459 Octave_object retval; |
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460 char *directory; |
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461 |
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462 if (verbatim_pwd) |
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463 { |
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464 char *buffer = new char [MAXPATHLEN]; |
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1111
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465 directory = octave_getcwd (buffer, MAXPATHLEN); |
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523
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466 |
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467 if (!directory) |
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468 { |
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469 warning ("pwd: can't find working directory!"); |
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470 delete buffer; |
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471 } |
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472 } |
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473 else |
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474 { |
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475 directory = get_working_directory ("pwd"); |
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476 } |
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477 |
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478 if (directory) |
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479 { |
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1592
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480 if (nargout == 0) |
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481 { |
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482 ostrstream output_buf; |
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483 output_buf << directory << "\n" << ends; |
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484 maybe_page_output (output_buf); |
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485 } |
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486 else |
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487 retval = directory; |
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523
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488 } |
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1592
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489 |
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523
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490 return retval; |
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|
491 } |
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492 |
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1488
|
493 DEFUN ("readdir", Freaddir, Sreaddir, 10, |
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1389
|
494 "readdir (NAME)\n\ |
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|
495 \n\ |
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|
496 Return an array of strings containing the list of all files in the |
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1401
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497 named directory. If sucessful, returns 0; otherwise an error message |
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|
498 is printed.") |
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1389
|
499 { |
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|
500 Octave_object retval; |
|
1572
|
501 charMatrix dirlist; |
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1389
|
502 int status = 0; |
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|
503 |
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1401
|
504 if (args.length () == 1) |
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1389
|
505 { |
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1728
|
506 string tstr = args(0).string_value (); |
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|
507 const char *dirname = tstr.c_str (); |
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1389
|
508 |
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1401
|
509 if (error_state) |
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1389
|
510 { |
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1401
|
511 status = -1; |
|
1402
|
512 gripe_wrong_type_arg ("readdir", args(0)); |
|
1401
|
513 } |
|
|
514 else |
|
|
515 { |
|
1489
|
516 char *tmp = tilde_expand (dirname); |
|
|
517 |
|
|
518 DIR *dir = opendir (tmp); |
|
|
519 |
|
|
520 free (tmp); |
|
1389
|
521 |
|
1401
|
522 if (dir) |
|
1389
|
523 { |
|
1401
|
524 int count = 0; |
|
1572
|
525 int max_len = 0; |
|
|
526 |
|
|
527 struct dirent *dir_entry; |
|
|
528 |
|
|
529 while ((dir_entry = readdir (dir))) |
|
|
530 { |
|
|
531 count++; |
|
|
532 int len = strlen (dir_entry->d_name); |
|
|
533 if (len > max_len) |
|
|
534 max_len = len; |
|
|
535 } |
|
1401
|
536 |
|
|
537 rewinddir (dir); |
|
|
538 |
|
1572
|
539 dirlist.resize (count, max_len, 0); |
|
1389
|
540 |
|
1401
|
541 while ((dir_entry = readdir (dir))) |
|
|
542 { |
|
|
543 if (--count < 0) |
|
|
544 break; |
|
|
545 |
|
1572
|
546 dirlist.insert (dir_entry->d_name, count, 0); |
|
1401
|
547 } |
|
1389
|
548 |
|
|
549 #if defined (CLOSEDIR_VOID) |
|
1401
|
550 closedir (dir); |
|
1389
|
551 #else |
|
1401
|
552 if (closedir (dir) < 0) |
|
|
553 { |
|
|
554 status = -1; |
|
|
555 error ("%s", strerror (errno)); |
|
|
556 } |
|
1389
|
557 #endif |
|
|
558 |
|
1401
|
559 if (count != 0) |
|
|
560 { |
|
|
561 status = -1; |
|
|
562 error ("readdir: failed reading directory"); |
|
|
563 } |
|
|
564 } |
|
|
565 else |
|
|
566 { |
|
|
567 status = -1; |
|
|
568 error ("%s", strerror (errno)); |
|
|
569 } |
|
1389
|
570 } |
|
|
571 } |
|
|
572 else |
|
|
573 print_usage ("readdir"); |
|
|
574 |
|
1401
|
575 if (status == 0) |
|
1572
|
576 retval(0) = tree_constant (dirlist, 1); |
|
1401
|
577 |
|
|
578 return retval; |
|
|
579 } |
|
|
580 |
|
|
581 // XXX FIXME XXX -- should probably also allow second arg to specify |
|
|
582 // mode. |
|
|
583 |
|
1488
|
584 DEFUN ("mkdir", Fmkdir, Smkdir, 10, |
|
1401
|
585 "mkdir (NAME)\n\ |
|
|
586 \n\ |
|
|
587 Create the directory named by NAME. If successful, returns 0;\n\ |
|
|
588 otherwise prints an error message.") |
|
|
589 { |
|
|
590 Octave_object retval; |
|
|
591 |
|
|
592 int status = 0; |
|
|
593 |
|
|
594 if (args.length () == 1) |
|
|
595 { |
|
1728
|
596 string tstr = args(0).string_value (); |
|
|
597 const char *dirname = tstr.c_str (); |
|
1401
|
598 |
|
|
599 if (error_state) |
|
1402
|
600 gripe_wrong_type_arg ("mkdir", args(0)); |
|
1489
|
601 else |
|
1401
|
602 { |
|
1489
|
603 char *tmp = tilde_expand (dirname); |
|
|
604 |
|
|
605 int mkdir_retval = mkdir (tmp, 0777); |
|
|
606 |
|
|
607 free (tmp); |
|
|
608 |
|
|
609 if (mkdir_retval < 0) |
|
|
610 { |
|
|
611 status = -1; |
|
|
612 error ("%s", strerror (errno)); |
|
|
613 } |
|
1401
|
614 } |
|
|
615 } |
|
|
616 else |
|
|
617 print_usage ("mkdir"); |
|
|
618 |
|
|
619 if (status == 0) |
|
1389
|
620 retval (0) = (double) status; |
|
1401
|
621 |
|
|
622 return retval; |
|
|
623 } |
|
|
624 |
|
1488
|
625 DEFUN ("rmdir", Frmdir, Srmdir, 10, |
|
1401
|
626 "rmdir (NAME)\n\ |
|
|
627 \n\ |
|
|
628 Remove the directory named by NAME. If successful, returns 0;\n\ |
|
|
629 otherwise prints an error message.") |
|
|
630 { |
|
|
631 Octave_object retval; |
|
|
632 |
|
|
633 int status = 0; |
|
|
634 |
|
|
635 if (args.length () == 1) |
|
|
636 { |
|
1728
|
637 string tstr = args(0).string_value (); |
|
|
638 const char *dirname = tstr.c_str (); |
|
1401
|
639 |
|
|
640 if (error_state) |
|
1402
|
641 gripe_wrong_type_arg ("rmdir", args(0)); |
|
1489
|
642 else |
|
1401
|
643 { |
|
1489
|
644 char *tmp = tilde_expand (dirname); |
|
|
645 |
|
|
646 int rmdir_retval = rmdir (tmp); |
|
|
647 |
|
|
648 free (tmp); |
|
|
649 |
|
|
650 if (rmdir_retval < 0) |
|
|
651 { |
|
|
652 status = -1; |
|
|
653 error ("%s", strerror (errno)); |
|
|
654 } |
|
1401
|
655 } |
|
|
656 } |
|
1389
|
657 else |
|
1401
|
658 print_usage ("rmdir"); |
|
|
659 |
|
|
660 if (status == 0) |
|
|
661 retval (0) = (double) status; |
|
|
662 |
|
|
663 return retval; |
|
|
664 } |
|
|
665 |
|
1488
|
666 DEFUN ("rename", Frename, Srename, 10, |
|
1401
|
667 "rename (FROM, TO)\n\ |
|
|
668 \n\ |
|
|
669 Rename a file. If successful, returns 0;\n\ |
|
|
670 otherwise prints an error message and returns -1.") |
|
|
671 { |
|
|
672 Octave_object retval; |
|
|
673 |
|
|
674 int status = 0; |
|
|
675 |
|
|
676 if (args.length () == 2) |
|
|
677 { |
|
1728
|
678 string tstr1 = args(0).string_value (); |
|
|
679 const char *from = tstr1.c_str (); |
|
|
680 |
|
1401
|
681 if (error_state) |
|
1402
|
682 gripe_wrong_type_arg ("rename", args(0)); |
|
|
683 else |
|
1401
|
684 { |
|
1728
|
685 string tstr2 = args(1).string_value (); |
|
|
686 const char *to = tstr2.c_str (); |
|
|
687 |
|
1402
|
688 if (error_state) |
|
|
689 gripe_wrong_type_arg ("rename", args(1)); |
|
|
690 else if (rename (from, to) < 0) |
|
|
691 { |
|
|
692 status = -1; |
|
|
693 error ("%s", strerror (errno)); |
|
|
694 } |
|
1401
|
695 } |
|
|
696 } |
|
|
697 else |
|
|
698 print_usage ("rename"); |
|
|
699 |
|
|
700 if (status == 0) |
|
|
701 retval (0) = (double) status; |
|
1389
|
702 |
|
|
703 return retval; |
|
|
704 } |
|
|
705 |
|
523
|
706 /* |
|
|
707 ;;; Local Variables: *** |
|
|
708 ;;; mode: C++ *** |
|
|
709 ;;; page-delimiter: "^/\\*" *** |
|
|
710 ;;; End: *** |
|
|
711 */ |
