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1 // file-ops.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 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 #if !defined (octave_file_ops_h) |
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25 #define octave_file_ops_h 1 |
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26 |
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27 #include <string> |
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28 |
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29 class |
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30 file_stat |
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31 { |
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32 public: |
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33 |
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34 file_stat (const string& n = string (), bool fl = 1) |
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35 : file_name (n), follow_links (fl), initialized (false) |
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36 { |
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37 if (! file_name.empty ()) |
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38 update_internal (); |
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39 } |
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40 |
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41 file_stat (const file_stat& f) { copy (f); } |
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42 |
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43 file_stat& operator = (const file_stat& f) |
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44 { |
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45 copy (f); |
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46 return *this; |
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47 } |
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48 |
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49 ~file_stat (void) { } |
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50 |
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51 void get_stats (bool force = false) |
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52 { |
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53 if (! initialized || force) |
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54 update_internal (force); |
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55 } |
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56 |
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57 void get_stats (const string& n, bool force = false) |
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58 { |
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59 if (n != file_name || ! initialized || force) |
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60 { |
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61 initialized = false; |
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62 |
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63 file_name = n; |
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64 |
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65 update_internal (force); |
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66 } |
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67 } |
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68 |
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69 // File status and info. These should only be called for objects |
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70 // that are already properly initialized. |
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71 |
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72 bool is_blk (void) const; |
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73 bool is_chr (void) const; |
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74 bool is_dir (void) const; |
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75 bool is_fifo (void) const; |
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76 bool is_lnk (void) const; |
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77 bool is_reg (void) const; |
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78 bool is_sock (void) const; |
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79 |
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80 ino_t ino (void) const { return fs_ino; } |
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81 dev_t dev (void) const { return fs_dev; } |
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82 |
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83 nlink_t nlink (void) const { return fs_nlink; } |
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84 |
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85 uid_t uid (void) const { return fs_uid; } |
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86 gid_t gid (void) const { return fs_gid; } |
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87 |
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88 off_t size (void) const { return fs_size; } |
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89 |
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90 time_t atime (void) const { return fs_atime; } |
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91 time_t mtime (void) const { return fs_mtime; } |
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92 time_t ctime (void) const { return fs_ctime; } |
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93 |
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94 #if defined (HAVE_ST_RDEV) |
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95 dev_t rdev (void) const { return fs_rdev; } |
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96 #endif |
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97 |
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98 #if defined (HAVE_ST_BLKSIZE) |
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99 long blksize (void) const { return fs_blksize; } |
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100 #endif |
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101 |
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102 #if defined (HAVE_ST_BLOCKS) |
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103 long blocks (void) const { return fs_blocks; } |
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104 #endif |
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105 |
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106 string mode_as_string (void) const; |
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107 |
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108 bool ok (void) const { return initialized && ! fail; } |
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109 |
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110 operator void* () const { return ok () ? (void *) -1 : (void *) 0; } |
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111 |
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112 bool exists (void) const { return ok (); } |
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113 |
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114 string error (void) const { return ok () ? string () : errmsg; } |
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115 |
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116 // Has the file referenced by this object been modified since TIME? |
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117 bool is_newer (time_t time) const { return fs_mtime > time; } |
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118 |
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119 private: |
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120 |
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121 // Name of the file. |
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122 string file_name; |
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123 |
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124 // TRUE means follow symbolic links to the ultimate file (stat). |
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125 // FALSE means get information about the link itself (lstat). |
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126 bool follow_links; |
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127 |
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128 // TRUE means we have already called stat. |
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129 bool initialized; |
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130 |
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131 // TRUE means the stat for this file failed. |
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132 bool fail; |
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133 |
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134 // If a failure occurs, this contains the system error text. |
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135 string errmsg; |
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136 |
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137 // file type and permissions |
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138 mode_t fs_mode; |
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139 |
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140 // serial number |
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141 ino_t fs_ino; |
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142 |
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143 // device number |
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144 dev_t fs_dev; |
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145 |
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146 // number of links |
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147 nlink_t fs_nlink; |
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148 |
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149 // user ID of owner |
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150 uid_t fs_uid; |
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151 |
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152 // group ID of owner |
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153 gid_t fs_gid; |
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154 |
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155 // size in bytes, for regular files |
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156 off_t fs_size; |
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157 |
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158 // time of last access |
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159 time_t fs_atime; |
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160 |
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161 // time of last modification |
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162 time_t fs_mtime; |
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163 |
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164 // time of last file status change |
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165 time_t fs_ctime; |
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166 |
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167 #if defined (HAVE_ST_RDEV) |
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168 // device number for special files |
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169 dev_t fs_rdev; |
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170 #endif |
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171 |
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172 #if defined (HAVE_ST_BLKSIZE) |
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173 // best I/O block size |
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174 long fs_blksize; |
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175 #endif |
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176 |
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177 #if defined (HAVE_ST_BLOCKS) |
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178 // number of 512-byte blocks allocated |
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179 long fs_blocks; |
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180 #endif |
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181 |
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182 void update_internal (bool force = false); |
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183 |
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184 void copy (const file_stat&); |
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185 }; |
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186 |
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187 extern int is_newer (const string&, time_t); |
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188 |
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189 extern int oct_mkdir (const string&, mode_t); |
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190 extern int oct_mkfifo (const string&, mode_t); |
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191 extern int oct_rename (const string&, const string&); |
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192 extern int oct_rmdir (const string&); |
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193 extern int oct_umask (mode_t); |
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194 extern int oct_unlink (const string&); |
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195 |
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196 #endif |
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197 |
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198 /* |
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199 ;;; Local Variables: *** |
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200 ;;; mode: C++ *** |
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201 ;;; page-delimiter: "^/\\*" *** |
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202 ;;; End: *** |
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203 */ |
