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maint: Merge stable to default.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 28 May 2024 15:25:54 +0200
parents 4b601ca024d5
children
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27923
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2024 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_file_stat_h)
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27 #define octave_file_stat_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <string>
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32
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33 #include "oct-time.h"
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34
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35 #include <sys/types.h>
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36
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37 OCTAVE_BEGIN_NAMESPACE(octave)
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38
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39 OCTAVE_BEGIN_NAMESPACE(sys)
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40
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41 class OCTAVE_API base_file_stat
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42 {
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43 public:
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44
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45 base_file_stat ()
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46 : m_initialized (false), m_fail (false), m_errmsg (), m_mode (),
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47 m_ino (), m_dev (), m_nlink (), m_uid (), m_gid (),
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48 m_size (), m_atime (), m_mtime (), m_ctime (), m_rdev (),
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49 m_blksize (), m_blocks () { }
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50
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51 base_file_stat (const base_file_stat& fs)
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52 : m_initialized (fs.m_initialized), m_fail (fs.m_fail),
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53 m_errmsg (fs.m_errmsg), m_mode (fs.m_mode), m_ino (fs.m_ino),
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54 m_dev (fs.m_dev), m_nlink (fs.m_nlink), m_uid (fs.m_uid),
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55 m_gid (fs.m_gid), m_size (fs.m_size), m_atime (fs.m_atime),
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56 m_mtime (fs.m_mtime), m_ctime (fs.m_ctime), m_rdev (fs.m_rdev),
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57 m_blksize (fs.m_blksize), m_blocks (fs.m_blocks) { }
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58
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59 base_file_stat& operator = (const base_file_stat& fs)
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60 {
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61 if (this != &fs)
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62 {
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63 m_initialized = fs.m_initialized;
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64 m_fail = fs.m_fail;
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65 m_errmsg = fs.m_errmsg;
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66 m_mode = fs.m_mode;
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67 m_ino = fs.m_ino;
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68 m_dev = fs.m_dev;
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69 m_nlink = fs.m_nlink;
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70 m_uid = fs.m_uid;
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71 m_gid = fs.m_gid;
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72 m_size = fs.m_size;
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73 m_atime = fs.m_atime;
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74 m_mtime = fs.m_mtime;
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75 m_ctime = fs.m_ctime;
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76 m_rdev = fs.m_rdev;
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77 m_blksize = fs.m_blksize;
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78 m_blocks = fs.m_blocks;
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79 }
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80
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81 return *this;
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82 }
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83
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84 // The minimum difference in file time stamp values.
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85 // FIXME: This value should come from the filesystem itself.
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86 // How can we get that info?
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87 sys::time time_resolution () const
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88 {
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89 static sys::time resolution (1.0);
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90 return resolution;
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91 }
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92
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93 // File status and info. The is_XXX functions will return false for
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94 // file_stat objects that are not properly initialized. The others
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95 // should all return 0 (or the equivalent, for the given object)
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96 // which is likely not meaningful.
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97
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98 bool is_blk () const;
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99 bool is_chr () const;
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100 bool is_dir () const;
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101 bool is_fifo () const;
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102 bool is_lnk () const;
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103 bool is_reg () const;
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104 bool is_sock () const;
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105
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106 static bool is_blk (mode_t mode);
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107 static bool is_chr (mode_t mode);
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108 static bool is_dir (mode_t mode);
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109 static bool is_fifo (mode_t mode);
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110 static bool is_lnk (mode_t mode);
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111 static bool is_reg (mode_t mode);
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112 static bool is_sock (mode_t mode);
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113
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114 static bool have_struct_stat_st_rdev ();
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115 static bool have_struct_stat_st_blksize ();
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116 static bool have_struct_stat_st_blocks ();
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117
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118 ino_t ino () const { return m_ino; }
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119 dev_t dev () const { return m_dev; }
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120
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121 nlink_t nlink () const { return m_nlink; }
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122
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123 uid_t uid () const { return m_uid; }
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124 gid_t gid () const { return m_gid; }
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125
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126 off_t size () const { return m_size; }
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127
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128 sys::time atime () const { return m_atime; }
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129 sys::time mtime () const { return m_mtime; }
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130 sys::time ctime () const { return m_ctime; }
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131
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132 dev_t rdev () const { return m_rdev; }
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133
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134 long blksize () const { return m_blksize; }
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135 long blocks () const { return m_blocks; }
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136
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137 mode_t mode () const { return m_mode; }
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138
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139 std::string mode_as_string () const;
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140
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141 bool ok () const { return m_initialized && ! m_fail; }
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142
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143 operator bool () const { return ok (); }
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144
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145 bool exists () const { return ok (); }
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146
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147 std::string error () const { return ok () ? "" : m_errmsg; }
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148
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149 // Has the file referenced by this object been modified since TIME?
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150 bool is_newer (const sys::time& time) const { return m_mtime > time; }
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151
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152 // It's nice to be able to hide the file_stat object if we don't
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153 // really care about it.
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154 static int is_newer (const std::string&, const sys::time&);
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155
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156 protected:
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157
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158 virtual ~base_file_stat () = default;
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159
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160 // TRUE means we have already called stat.
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161 bool m_initialized;
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162
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163 // TRUE means the stat for this file failed.
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164 bool m_fail;
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165
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166 // If a failure occurs, this contains the system error text.
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167 std::string m_errmsg;
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168
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169 // file type and permissions
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170 mode_t m_mode;
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171
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172 // serial number
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173 ino_t m_ino;
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174
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175 // device number
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176 dev_t m_dev;
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177
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178 // number of links
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179 nlink_t m_nlink;
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180
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181 // user ID of owner
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182 uid_t m_uid;
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183
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184 // group ID of owner
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185 gid_t m_gid;
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186
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187 // size in bytes, for regular files
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188 off_t m_size;
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189
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190 // time of last access
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191 sys::time m_atime;
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192
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193 // time of last modification
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194 sys::time m_mtime;
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195
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196 // time of last file status change
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197 sys::time m_ctime;
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198
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199 // device number for special files
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200 dev_t m_rdev;
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201
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202 // best I/O block size
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203 long m_blksize;
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204
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205 // number of 512-byte blocks allocated
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206 long m_blocks;
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207 };
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208
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209 class OCTAVE_API file_stat : public base_file_stat
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210 {
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211 public:
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212
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213 // This constructor must remain defined in the cpp file rather than in
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214 // the header file (bug #50234).
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215 file_stat (const std::string& n = "", bool fl = true);
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216
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217 file_stat (const file_stat& fs)
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218 : base_file_stat (fs), m_file_name (fs.m_file_name),
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219 m_follow_links (fs.m_follow_links) { }
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220
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221 file_stat& operator = (const file_stat& fs)
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222 {
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223 if (this != &fs)
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224 {
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225 base_file_stat::operator = (fs);
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226
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227 m_file_name = fs.m_file_name;
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228 m_follow_links = fs.m_follow_links;
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229 }
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230
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231 return *this;
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232 }
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233
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234 // This destructor must remain as an empty destructor defined in the
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235 // cpp file rather than in the header file (bug #50234).
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236 ~file_stat ();
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237
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238 void get_stats (bool force = false)
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239 {
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240 if (! m_initialized || force)
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241 update_internal (force);
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242 }
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243
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244 void get_stats (const std::string& n, bool force = false)
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245 {
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246 if (n != m_file_name || ! m_initialized || force)
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247 {
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248 m_initialized = false;
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249
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250 m_file_name = n;
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251
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252 update_internal (force);
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253 }
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254 }
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255
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256 private:
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257
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258 // Name of the file.
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259 std::string m_file_name;
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260
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261 // TRUE means follow symbolic links to the ultimate file (stat).
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262 // FALSE means get information about the link itself (lstat).
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263 bool m_follow_links;
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264
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265 void update_internal (bool force = false);
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266 };
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267
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268 class OCTAVE_API file_fstat : public base_file_stat
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269 {
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270 public:
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271
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272 file_fstat () = delete;
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273
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274 file_fstat (int n) : base_file_stat (), m_fid (n)
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275 {
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276 update_internal ();
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277 }
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278
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279 OCTAVE_DEFAULT_COPY_MOVE_DELETE (file_fstat)
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280
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281 void get_stats (bool force = false)
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282 {
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283 if (! m_initialized || force)
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284 update_internal (force);
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285 }
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286
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287 void get_stats (int n, bool force = false)
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288 {
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289 if (n != m_fid || ! m_initialized || force)
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290 {
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291 m_initialized = false;
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292
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293 m_fid = n;
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294
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295 update_internal (force);
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296 }
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297 }
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298
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299 private:
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300
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301 // Open file descriptor.
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302 int m_fid;
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303
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304 void update_internal (bool force = false);
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305 };
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306
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307 OCTAVE_END_NAMESPACE(sys)
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308 OCTAVE_END_NAMESPACE(octave)
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309
2926
66ef74ee5d9f [project @ 1997-05-05 03:20:52 by jwe]
jwe
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310 #endif