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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 "toplev.h" |
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56 #include "pager.h" |
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57 #include "pathlen.h" |
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58 #include "procstream.h" |
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59 #include "statdefs.h" |
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60 #include "sysdep.h" |
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61 #include "sysdir.h" |
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62 #include "tree-const.h" |
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63 #include "tree-plot.h" |
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64 #include "unwind-prot.h" |
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65 #include "utils.h" |
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66 |
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67 // Temp storage for a path. |
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68 static char tdir[MAXPATHLEN]; |
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69 |
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70 // Non-zero means follow symbolic links that point to directories just |
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71 // as if they are real directories. |
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72 static int follow_symbolic_links = 1; |
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73 |
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74 // Non-zero means that pwd always give verbatim directory, regardless |
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75 // of symbolic link following. |
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76 static int verbatim_pwd = 1; |
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77 |
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78 // Remove the last N directories from PATH. Do not PATH blank. |
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79 // PATH must contain enough space for MAXPATHLEN characters. |
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80 |
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81 void |
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82 pathname_backup (char *path, int n) |
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83 { |
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84 register char *p; |
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85 |
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86 if (! *path) |
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87 return; |
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88 |
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89 p = path + (strlen (path) - 1); |
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90 |
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91 while (n--) |
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92 { |
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93 while (*p == '/' && p != path) |
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94 p--; |
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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 *++p = '\0'; |
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100 } |
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101 } |
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102 |
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103 // Return a pretty pathname. If the first part of the pathname is the |
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104 // same as $HOME, then replace that with `~'. |
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105 |
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106 char * |
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107 polite_directory_format (char *name) |
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108 { |
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109 int l = home_directory ? strlen (home_directory) : 0; |
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110 |
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111 if (l > 1 && strncmp (home_directory, name, l) == 0 |
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112 && (! name[l] || name[l] == '/')) |
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113 { |
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114 strcpy (tdir + 1, name + l); |
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115 tdir[0] = '~'; |
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116 return (tdir); |
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117 } |
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118 else |
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119 return name; |
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120 } |
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121 |
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122 // Return 1 if STRING contains an absolute pathname, else 0. |
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123 |
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124 int |
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125 absolute_pathname (const char *string) |
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126 { |
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127 if (! string || ! *string) |
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128 return 0; |
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129 |
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130 if (*string == '/') |
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131 return 1; |
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132 |
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133 if (*string++ == '.') |
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134 { |
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135 if ((! *string) || *string == '/') |
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136 return 1; |
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137 |
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138 if (*string++ == '.') |
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139 if (! *string || *string == '/') |
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140 return 1; |
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141 } |
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142 return 0; |
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143 } |
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144 |
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145 // Return 1 if STRING is an absolute program name; it is absolute if |
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146 // it contains any slashes. This is used to decide whether or not to |
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147 // look up through $PATH. |
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148 |
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149 int |
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150 absolute_program (const char *string) |
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151 { |
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152 return (strchr (string, '/') != 0); |
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153 } |
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154 |
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155 // Return the `basename' of the pathname in STRING (the stuff after |
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156 // the last '/'). If STRING is not a full pathname, simply return it. |
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157 |
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158 char * |
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159 base_pathname (char *string) |
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160 { |
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161 char *p = strrchr (string, '/'); |
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162 |
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163 if (! absolute_pathname (string)) |
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164 return (string); |
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165 |
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166 if (p) |
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167 return (++p); |
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168 else |
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169 return (string); |
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170 } |
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171 |
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172 // Turn STRING (a pathname) into an absolute pathname, assuming that |
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173 // DOT_PATH contains the symbolic location of '.'. This always |
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174 // returns a new string, even if STRING was an absolute pathname to |
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175 // begin with. |
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176 |
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177 char * |
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178 make_absolute (const char *string, const char *dot_path) |
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179 { |
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180 static char current_path[MAXPATHLEN]; |
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181 register char *cp; |
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182 |
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183 if (! dot_path || *string == '/') |
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184 return strsave (string); |
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185 |
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186 strcpy (current_path, dot_path); |
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187 |
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188 if (! current_path[0]) |
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189 strcpy (current_path, "./"); |
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190 |
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191 cp = current_path + (strlen (current_path) - 1); |
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192 |
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193 if (*cp++ != '/') |
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194 *cp++ = '/'; |
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195 |
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196 *cp = '\0'; |
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197 |
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198 while (*string) |
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199 { |
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200 if (*string == '.') |
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201 { |
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202 if (! string[1]) |
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203 return strsave (current_path); |
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204 |
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205 if (string[1] == '/') |
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206 { |
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207 string += 2; |
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208 continue; |
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209 } |
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210 |
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211 if (string[1] == '.' && (string[2] == '/' || ! string[2])) |
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212 { |
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213 string += 2; |
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214 |
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215 if (*string) |
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216 string++; |
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217 |
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218 pathname_backup (current_path, 1); |
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219 cp = current_path + strlen (current_path); |
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220 continue; |
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221 } |
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222 } |
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223 |
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224 while (*string && *string != '/') |
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225 *cp++ = *string++; |
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226 |
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227 if (*string) |
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228 *cp++ = *string++; |
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229 |
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230 *cp = '\0'; |
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231 } |
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232 return strsave (current_path); |
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233 } |
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234 |
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661
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235 // Has file `A' been modified after time `T'? |
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236 // |
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237 // case: |
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238 // |
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239 // a newer than t returns 1 |
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240 // a older than t returns 0 |
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241 // stat on a fails returns -1 |
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242 |
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523
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243 int |
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244 is_newer (const char *fa, time_t t) |
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245 { |
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246 struct stat fa_sb; |
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247 register int fa_stat; |
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248 register int status = 0; |
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249 |
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250 fa_stat = stat (fa, &fa_sb); |
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251 if (fa_stat != 0) |
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252 status = -1; |
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253 |
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254 if (status != 0) |
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255 return status; |
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256 |
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257 return (fa_sb.st_mtime > t); |
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258 } |
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259 |
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661
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260 // Return a consed string which is the current working directory. |
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261 // FOR_WHOM is the name of the caller for error printing. |
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262 |
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263 char * |
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264 get_working_directory (const char *for_whom) |
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265 { |
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266 if (! follow_symbolic_links) |
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267 { |
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268 if (the_current_working_directory) |
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269 delete [] the_current_working_directory; |
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270 |
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271 the_current_working_directory = 0; |
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272 } |
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273 |
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274 if (! the_current_working_directory) |
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275 { |
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276 char *directory; |
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277 |
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278 the_current_working_directory = new char [MAXPATHLEN]; |
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279 directory = octave_getcwd (the_current_working_directory, MAXPATHLEN); |
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523
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280 if (! directory) |
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281 { |
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282 message (for_whom, the_current_working_directory); |
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283 delete [] the_current_working_directory; |
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284 the_current_working_directory = 0; |
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285 return 0; |
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286 } |
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287 } |
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288 |
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289 return the_current_working_directory; |
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290 } |
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291 |
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661
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292 // Do the work of changing to the directory NEWDIR. Handle symbolic |
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293 // link following, etc. |
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294 |
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295 static int |
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296 change_to_directory (const char *newdir) |
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297 { |
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298 char *t; |
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299 |
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300 if (follow_symbolic_links) |
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301 { |
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302 if (! the_current_working_directory) |
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303 get_working_directory ("cd_links"); |
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304 |
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305 if (the_current_working_directory) |
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306 t = make_absolute (newdir, the_current_working_directory); |
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307 else |
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308 t = strsave (newdir); |
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309 |
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310 // Get rid of trailing `/'. |
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311 |
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523
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312 { |
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313 register int len_t = strlen (t); |
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314 if (len_t > 1) |
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315 { |
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316 --len_t; |
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317 if (t[len_t] == '/') |
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318 t[len_t] = '\0'; |
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319 } |
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320 } |
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321 |
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1111
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322 if (octave_chdir (t) < 0) |
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523
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323 { |
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324 delete [] t; |
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325 return 0; |
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326 } |
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327 |
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328 if (the_current_working_directory) |
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329 strcpy (the_current_working_directory, t); |
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330 |
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331 delete [] t; |
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332 return 1; |
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333 } |
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334 else |
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335 { |
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1111
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336 if (octave_chdir (newdir) < 0) |
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523
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337 return 0; |
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338 else |
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339 return 1; |
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340 } |
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341 } |
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342 |
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1328
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343 static int |
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344 octave_change_to_directory (const char *newdir) |
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345 { |
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346 int cd_ok = change_to_directory (newdir); |
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347 |
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348 if (cd_ok) |
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349 do_external_plotter_cd (newdir); |
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350 else |
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351 error ("%s: %s", newdir, strerror (errno)); |
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352 |
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353 return cd_ok; |
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354 } |
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355 |
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1488
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356 DEFUN_TEXT ("cd", Fcd, Scd, 10, |
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523
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357 "cd [dir]\n\ |
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358 \n\ |
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359 change current working directory\n\ |
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360 if no arguments are given, the current directory is changed to the\n\ |
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361 users home directory") |
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362 { |
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363 Octave_object retval; |
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364 |
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365 DEFINE_ARGV("cd"); |
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366 |
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367 if (argc > 1) |
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368 { |
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369 static char *dirname = 0; |
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370 |
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371 if (dirname) |
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372 free (dirname); |
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373 |
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374 dirname = tilde_expand (argv[1]); |
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375 |
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1328
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376 if (dirname && ! octave_change_to_directory (dirname)) |
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523
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377 { |
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378 DELETE_ARGV; |
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379 return retval; |
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380 } |
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381 } |
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382 else |
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383 { |
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1328
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384 if (! home_directory || ! octave_change_to_directory (home_directory)) |
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523
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385 { |
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386 DELETE_ARGV; |
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387 return retval; |
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388 } |
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389 } |
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390 |
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391 char *directory = get_working_directory ("cd"); |
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392 tree_constant *dir = new tree_constant (directory); |
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393 bind_builtin_variable ("PWD", dir, 1); |
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394 |
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395 DELETE_ARGV; |
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396 |
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397 return retval; |
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398 } |
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399 |
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611
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400 DEFALIAS (chdir, cd); |
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401 |
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661
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402 // Get a directory listing. |
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403 |
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1488
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404 DEFUN_TEXT ("ls", Fls, Sls, 10, |
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523
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405 "ls [options]\n\ |
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406 \n\ |
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407 print a directory listing") |
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408 { |
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409 Octave_object retval; |
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410 |
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411 DEFINE_ARGV("ls"); |
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412 |
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413 ostrstream ls_buf; |
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414 |
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415 ls_buf << "ls -C "; |
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416 for (int i = 1; i < argc; i++) |
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1158
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417 { |
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418 char *tmp = tilde_expand (argv[i]); |
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419 ls_buf << tmp << " "; |
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420 free (tmp); |
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421 } |
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523
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422 |
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423 ls_buf << ends; |
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1449
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424 char *ls_command = ls_buf.str (); |
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523
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425 |
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1449
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426 iprocstream *cmd = new iprocstream (ls_command); |
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523
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427 |
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1469
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428 delete [] ls_command; |
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429 |
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1449
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430 add_unwind_protect (cleanup_iprocstream, cmd); |
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523
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431 |
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1449
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432 if (cmd && *cmd) |
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433 { |
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434 int ch; |
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435 ostrstream output_buf; |
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436 while ((ch = cmd->get ()) != EOF) |
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437 output_buf << (char) ch; |
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438 output_buf << ends; |
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523
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439 |
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1449
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440 maybe_page_output (output_buf); |
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441 } |
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442 else |
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443 error ("couldn't start process for ls!"); |
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523
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444 |
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1449
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445 run_unwind_protect (); |
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523
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446 |
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447 DELETE_ARGV; |
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448 |
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449 return retval; |
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450 } |
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451 |
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549
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452 DEFALIAS (dir, ls); |
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453 |
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1592
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454 DEFUN ("pwd", Fpwd, Spwd, 01, |
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523
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455 "pwd (): print current working directory") |
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456 { |
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457 Octave_object retval; |
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458 char *directory; |
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459 |
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460 if (verbatim_pwd) |
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461 { |
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462 char *buffer = new char [MAXPATHLEN]; |
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1111
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463 directory = octave_getcwd (buffer, MAXPATHLEN); |
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523
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464 |
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465 if (!directory) |
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466 { |
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467 warning ("pwd: can't find working directory!"); |
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468 delete buffer; |
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469 } |
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470 } |
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471 else |
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472 { |
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473 directory = get_working_directory ("pwd"); |
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474 } |
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475 |
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476 if (directory) |
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477 { |
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1592
|
478 if (nargout == 0) |
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479 { |
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480 ostrstream output_buf; |
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481 output_buf << directory << "\n" << ends; |
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482 maybe_page_output (output_buf); |
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483 } |
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484 else |
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485 retval = directory; |
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523
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486 } |
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1592
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487 |
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523
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488 return retval; |
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|
489 } |
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490 |
|
1488
|
491 DEFUN ("readdir", Freaddir, Sreaddir, 10, |
|
1389
|
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 { |
|
|
498 Octave_object retval; |
|
1572
|
499 charMatrix dirlist; |
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1389
|
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 { |
|
|
504 const char *dirname = args(0).string_value (); |
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|
505 |
|
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)); |
|
1401
|
510 } |
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|
511 else |
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|
512 { |
|
1489
|
513 char *tmp = tilde_expand (dirname); |
|
|
514 |
|
|
515 DIR *dir = opendir (tmp); |
|
|
516 |
|
|
517 free (tmp); |
|
1389
|
518 |
|
1401
|
519 if (dir) |
|
1389
|
520 { |
|
1401
|
521 int count = 0; |
|
1572
|
522 int max_len = 0; |
|
|
523 |
|
|
524 struct dirent *dir_entry; |
|
|
525 |
|
|
526 while ((dir_entry = readdir (dir))) |
|
|
527 { |
|
|
528 count++; |
|
|
529 int len = strlen (dir_entry->d_name); |
|
|
530 if (len > max_len) |
|
|
531 max_len = len; |
|
|
532 } |
|
1401
|
533 |
|
|
534 rewinddir (dir); |
|
|
535 |
|
1572
|
536 dirlist.resize (count, max_len, 0); |
|
1389
|
537 |
|
1401
|
538 while ((dir_entry = readdir (dir))) |
|
|
539 { |
|
|
540 if (--count < 0) |
|
|
541 break; |
|
|
542 |
|
1572
|
543 dirlist.insert (dir_entry->d_name, count, 0); |
|
1401
|
544 } |
|
1389
|
545 |
|
|
546 #if defined (CLOSEDIR_VOID) |
|
1401
|
547 closedir (dir); |
|
1389
|
548 #else |
|
1401
|
549 if (closedir (dir) < 0) |
|
|
550 { |
|
|
551 status = -1; |
|
|
552 error ("%s", strerror (errno)); |
|
|
553 } |
|
1389
|
554 #endif |
|
|
555 |
|
1401
|
556 if (count != 0) |
|
|
557 { |
|
|
558 status = -1; |
|
|
559 error ("readdir: failed reading directory"); |
|
|
560 } |
|
|
561 } |
|
|
562 else |
|
|
563 { |
|
|
564 status = -1; |
|
|
565 error ("%s", strerror (errno)); |
|
|
566 } |
|
1389
|
567 } |
|
|
568 } |
|
|
569 else |
|
|
570 print_usage ("readdir"); |
|
|
571 |
|
1401
|
572 if (status == 0) |
|
1572
|
573 retval(0) = tree_constant (dirlist, 1); |
|
1401
|
574 |
|
|
575 return retval; |
|
|
576 } |
|
|
577 |
|
|
578 // XXX FIXME XXX -- should probably also allow second arg to specify |
|
|
579 // mode. |
|
|
580 |
|
1488
|
581 DEFUN ("mkdir", Fmkdir, Smkdir, 10, |
|
1401
|
582 "mkdir (NAME)\n\ |
|
|
583 \n\ |
|
|
584 Create the directory named by NAME. If successful, returns 0;\n\ |
|
|
585 otherwise prints an error message.") |
|
|
586 { |
|
|
587 Octave_object retval; |
|
|
588 |
|
|
589 int status = 0; |
|
|
590 |
|
|
591 if (args.length () == 1) |
|
|
592 { |
|
|
593 const char *dirname = args(0).string_value (); |
|
|
594 |
|
|
595 if (error_state) |
|
1402
|
596 gripe_wrong_type_arg ("mkdir", args(0)); |
|
1489
|
597 else |
|
1401
|
598 { |
|
1489
|
599 char *tmp = tilde_expand (dirname); |
|
|
600 |
|
|
601 int mkdir_retval = mkdir (tmp, 0777); |
|
|
602 |
|
|
603 free (tmp); |
|
|
604 |
|
|
605 if (mkdir_retval < 0) |
|
|
606 { |
|
|
607 status = -1; |
|
|
608 error ("%s", strerror (errno)); |
|
|
609 } |
|
1401
|
610 } |
|
|
611 } |
|
|
612 else |
|
|
613 print_usage ("mkdir"); |
|
|
614 |
|
|
615 if (status == 0) |
|
1389
|
616 retval (0) = (double) status; |
|
1401
|
617 |
|
|
618 return retval; |
|
|
619 } |
|
|
620 |
|
1488
|
621 DEFUN ("rmdir", Frmdir, Srmdir, 10, |
|
1401
|
622 "rmdir (NAME)\n\ |
|
|
623 \n\ |
|
|
624 Remove the directory named by NAME. If successful, returns 0;\n\ |
|
|
625 otherwise prints an error message.") |
|
|
626 { |
|
|
627 Octave_object retval; |
|
|
628 |
|
|
629 int status = 0; |
|
|
630 |
|
|
631 if (args.length () == 1) |
|
|
632 { |
|
|
633 const char *dirname = args(0).string_value (); |
|
|
634 |
|
|
635 if (error_state) |
|
1402
|
636 gripe_wrong_type_arg ("rmdir", args(0)); |
|
1489
|
637 else |
|
1401
|
638 { |
|
1489
|
639 char *tmp = tilde_expand (dirname); |
|
|
640 |
|
|
641 int rmdir_retval = rmdir (tmp); |
|
|
642 |
|
|
643 free (tmp); |
|
|
644 |
|
|
645 if (rmdir_retval < 0) |
|
|
646 { |
|
|
647 status = -1; |
|
|
648 error ("%s", strerror (errno)); |
|
|
649 } |
|
1401
|
650 } |
|
|
651 } |
|
1389
|
652 else |
|
1401
|
653 print_usage ("rmdir"); |
|
|
654 |
|
|
655 if (status == 0) |
|
|
656 retval (0) = (double) status; |
|
|
657 |
|
|
658 return retval; |
|
|
659 } |
|
|
660 |
|
1488
|
661 DEFUN ("rename", Frename, Srename, 10, |
|
1401
|
662 "rename (FROM, TO)\n\ |
|
|
663 \n\ |
|
|
664 Rename a file. If successful, returns 0;\n\ |
|
|
665 otherwise prints an error message and returns -1.") |
|
|
666 { |
|
|
667 Octave_object retval; |
|
|
668 |
|
|
669 int status = 0; |
|
|
670 |
|
|
671 if (args.length () == 2) |
|
|
672 { |
|
|
673 const char *from = args(0).string_value (); |
|
|
674 if (error_state) |
|
1402
|
675 gripe_wrong_type_arg ("rename", args(0)); |
|
|
676 else |
|
1401
|
677 { |
|
1402
|
678 const char *to = args(1).string_value (); |
|
|
679 if (error_state) |
|
|
680 gripe_wrong_type_arg ("rename", args(1)); |
|
|
681 else if (rename (from, to) < 0) |
|
|
682 { |
|
|
683 status = -1; |
|
|
684 error ("%s", strerror (errno)); |
|
|
685 } |
|
1401
|
686 } |
|
|
687 } |
|
|
688 else |
|
|
689 print_usage ("rename"); |
|
|
690 |
|
|
691 if (status == 0) |
|
|
692 retval (0) = (double) status; |
|
1389
|
693 |
|
|
694 return retval; |
|
|
695 } |
|
|
696 |
|
523
|
697 /* |
|
|
698 ;;; Local Variables: *** |
|
|
699 ;;; mode: C++ *** |
|
|
700 ;;; page-delimiter: "^/\\*" *** |
|
|
701 ;;; End: *** |
|
|
702 */ |
