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1 /* |
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2 |
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_file_ops_h) |
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24 #define octave_file_ops_h 1 |
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25 |
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26 #include <string> |
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27 |
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28 class |
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29 file_stat |
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30 { |
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31 public: |
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32 |
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33 file_stat (const string& n = string (), bool fl = 1) |
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34 : file_name (n), follow_links (fl), initialized (false) |
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35 { |
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36 if (! file_name.empty ()) |
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37 update_internal (); |
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38 } |
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39 |
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40 file_stat (const file_stat& f) { copy (f); } |
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41 |
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42 file_stat& operator = (const file_stat& f) |
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43 { |
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44 if (this != &f) |
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45 copy (f); |
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46 |
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47 return *this; |
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48 } |
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49 |
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50 ~file_stat (void) { } |
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51 |
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52 void get_stats (bool force = false) |
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53 { |
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54 if (! initialized || force) |
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55 update_internal (force); |
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56 } |
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57 |
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58 void get_stats (const string& n, bool force = false) |
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59 { |
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60 if (n != file_name || ! initialized || force) |
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61 { |
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62 initialized = false; |
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63 |
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64 file_name = n; |
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65 |
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66 update_internal (force); |
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67 } |
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68 } |
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69 |
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70 // File status and info. These should only be called for objects |
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71 // that are already properly initialized. |
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72 |
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73 bool is_blk (void) const; |
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74 bool is_chr (void) const; |
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75 bool is_dir (void) const; |
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76 bool is_fifo (void) const; |
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77 bool is_lnk (void) const; |
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78 bool is_reg (void) const; |
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79 bool is_sock (void) const; |
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80 |
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81 ino_t ino (void) const { return fs_ino; } |
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82 dev_t dev (void) const { return fs_dev; } |
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83 |
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84 nlink_t nlink (void) const { return fs_nlink; } |
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85 |
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86 uid_t uid (void) const { return fs_uid; } |
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87 gid_t gid (void) const { return fs_gid; } |
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88 |
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89 off_t size (void) const { return fs_size; } |
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90 |
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91 time_t atime (void) const { return fs_atime; } |
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92 time_t mtime (void) const { return fs_mtime; } |
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93 time_t ctime (void) const { return fs_ctime; } |
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94 |
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95 #if defined (HAVE_ST_RDEV) |
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96 dev_t rdev (void) const { return fs_rdev; } |
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97 #endif |
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98 |
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99 #if defined (HAVE_ST_BLKSIZE) |
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100 long blksize (void) const { return fs_blksize; } |
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101 #endif |
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102 |
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103 #if defined (HAVE_ST_BLOCKS) |
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104 long blocks (void) const { return fs_blocks; } |
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105 #endif |
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106 |
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107 string mode_as_string (void) const; |
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108 |
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109 bool ok (void) const { return initialized && ! fail; } |
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110 |
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111 operator void* () const { return ok () ? (void *) -1 : (void *) 0; } |
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112 |
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113 bool exists (void) const { return ok (); } |
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114 |
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115 string error (void) const { return ok () ? string () : errmsg; } |
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116 |
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117 // Has the file referenced by this object been modified since TIME? |
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118 bool is_newer (time_t time) const { return fs_mtime > time; } |
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119 |
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120 private: |
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121 |
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122 // Name of the file. |
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123 string file_name; |
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124 |
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125 // TRUE means follow symbolic links to the ultimate file (stat). |
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126 // FALSE means get information about the link itself (lstat). |
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127 bool follow_links; |
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128 |
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129 // TRUE means we have already called stat. |
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130 bool initialized; |
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131 |
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132 // TRUE means the stat for this file failed. |
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133 bool fail; |
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134 |
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135 // If a failure occurs, this contains the system error text. |
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136 string errmsg; |
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137 |
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138 // file type and permissions |
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139 mode_t fs_mode; |
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140 |
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141 // serial number |
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142 ino_t fs_ino; |
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143 |
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144 // device number |
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145 dev_t fs_dev; |
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146 |
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147 // number of links |
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148 nlink_t fs_nlink; |
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149 |
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150 // user ID of owner |
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151 uid_t fs_uid; |
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152 |
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153 // group ID of owner |
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154 gid_t fs_gid; |
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155 |
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156 // size in bytes, for regular files |
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157 off_t fs_size; |
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158 |
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159 // time of last access |
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160 time_t fs_atime; |
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161 |
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162 // time of last modification |
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163 time_t fs_mtime; |
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164 |
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165 // time of last file status change |
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166 time_t fs_ctime; |
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167 |
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168 #if defined (HAVE_ST_RDEV) |
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169 // device number for special files |
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170 dev_t fs_rdev; |
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171 #endif |
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172 |
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173 #if defined (HAVE_ST_BLKSIZE) |
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174 // best I/O block size |
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175 long fs_blksize; |
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176 #endif |
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177 |
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178 #if defined (HAVE_ST_BLOCKS) |
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179 // number of 512-byte blocks allocated |
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180 long fs_blocks; |
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181 #endif |
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182 |
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183 void update_internal (bool force = false); |
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184 |
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185 void copy (const file_stat&); |
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186 }; |
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187 |
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188 extern int is_newer (const string&, time_t); |
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189 |
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190 extern int oct_mkdir (const string&, mode_t); |
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191 extern int oct_mkfifo (const string&, mode_t); |
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192 extern int oct_rename (const string&, const string&); |
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193 extern int oct_rmdir (const string&); |
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194 extern string oct_tempnam (void); |
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195 extern int oct_umask (mode_t); |
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196 extern int oct_unlink (const string&); |
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197 |
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198 #endif |
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199 |
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200 /* |
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201 ;;; Local Variables: *** |
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202 ;;; mode: C++ *** |
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203 ;;; End: *** |
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204 */ |
