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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cerrno> |
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28 #include <cstring> |
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29 |
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30 #ifdef HAVE_UNISTD_H |
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31 #ifdef HAVE_SYS_TYPES_H |
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32 #include <sys/types.h> |
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33 #endif |
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34 #include <unistd.h> |
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35 #endif |
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36 |
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37 #include "file-stat.h" |
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38 #include "statdefs.h" |
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39 |
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40 // These must come after <sys/types.h> and <sys/stat.h>. |
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41 |
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42 #include <safe-lstat.h> |
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43 #include <safe-stat.h> |
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44 |
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45 // XXX FIXME XXX -- the is_* and mode_as_string functions are only valid |
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46 // for initialized objects. If called for an object that is not |
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47 // initialized, they should throw an exception. |
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48 |
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49 bool |
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50 file_stat::is_blk (void) const |
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51 { |
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52 #ifdef S_ISBLK |
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53 return S_ISBLK (fs_mode); |
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54 #else |
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55 return false; |
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56 #endif |
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57 } |
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58 |
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59 bool |
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60 file_stat::is_chr (void) const |
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61 { |
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62 #ifdef S_ISCHR |
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63 return S_ISCHR (fs_mode); |
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64 #else |
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65 return false; |
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66 #endif |
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67 } |
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68 |
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69 bool |
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70 file_stat::is_dir (void) const |
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71 { |
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72 #ifdef S_ISDIR |
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73 return S_ISDIR (fs_mode); |
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74 #else |
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75 return false; |
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76 #endif |
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77 } |
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78 |
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79 bool |
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80 file_stat::is_fifo (void) const |
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81 { |
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82 #ifdef S_ISFIFO |
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83 return S_ISFIFO (fs_mode); |
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84 #else |
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85 return false; |
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86 #endif |
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87 } |
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88 |
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89 bool |
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90 file_stat::is_lnk (void) const |
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91 { |
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92 #ifdef S_ISLNK |
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93 return S_ISLNK (fs_mode); |
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94 #else |
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95 return false; |
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96 #endif |
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97 } |
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98 |
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99 bool |
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100 file_stat::is_reg (void) const |
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101 { |
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102 #ifdef S_ISREG |
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103 return S_ISREG (fs_mode); |
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104 #else |
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105 return false; |
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106 #endif |
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107 } |
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108 |
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109 bool |
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110 file_stat::is_sock (void) const |
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111 { |
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112 #ifdef S_ISSOCK |
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113 return S_ISSOCK (fs_mode); |
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114 #else |
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115 return false; |
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116 #endif |
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117 } |
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118 |
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119 extern "C" void mode_string (); |
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120 |
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121 string |
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122 file_stat::mode_as_string (void) const |
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123 { |
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124 char buf[11]; |
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125 |
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126 mode_string (fs_mode, buf); |
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127 |
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128 buf[10] = '\0'; |
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129 |
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130 return string (buf); |
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131 } |
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132 |
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133 // Has FILE been modified since TIME? Returns 1 for yes, 0 for no, |
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134 // and -1 for any error. |
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135 |
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136 int |
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137 file_stat::is_newer (const string& file, time_t time) |
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138 { |
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139 file_stat fs (file); |
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140 |
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141 return fs ? fs.is_newer (time) : -1; |
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142 } |
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143 |
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144 // Private stuff: |
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145 |
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146 void |
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147 file_stat::update_internal (bool force) |
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148 { |
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149 if (! initialized || force) |
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150 { |
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151 initialized = false; |
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152 fail = false; |
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153 |
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154 const char *cname = file_name.c_str (); |
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155 |
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156 struct stat buf; |
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157 |
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158 int status = follow_links |
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159 ? SAFE_STAT (cname, &buf) : SAFE_LSTAT (cname, &buf); |
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160 |
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161 if (status < 0) |
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162 { |
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163 fail = true; |
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164 errmsg = strerror (errno); |
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165 } |
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166 else |
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167 { |
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168 fs_mode = buf.st_mode; |
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169 fs_ino = buf.st_ino; |
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170 fs_dev = buf.st_dev; |
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171 fs_nlink = buf.st_nlink; |
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172 fs_uid = buf.st_uid; |
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173 fs_gid = buf.st_gid; |
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174 fs_size = buf.st_size; |
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175 fs_atime = buf.st_atime; |
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176 fs_mtime = buf.st_mtime; |
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177 fs_ctime = buf.st_ctime; |
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178 |
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179 #if defined (HAVE_ST_RDEV) |
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180 fs_rdev = buf.st_rdev; |
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181 #endif |
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182 |
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183 #if defined (HAVE_ST_BLKSIZE) |
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184 fs_blksize = buf.st_blksize; |
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185 #endif |
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186 |
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187 #if defined (HAVE_ST_BLOCKS) |
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188 fs_blocks = buf.st_blocks; |
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189 #endif |
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190 } |
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191 |
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192 initialized = true; |
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193 } |
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194 } |
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195 |
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196 void |
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197 file_stat::copy (const file_stat& fs) |
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198 { |
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199 file_name = fs.file_name; |
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200 follow_links = fs.follow_links; |
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201 initialized = fs.initialized; |
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202 fail = fs.fail; |
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203 errmsg = fs.errmsg; |
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204 fs_mode = fs.fs_mode; |
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205 fs_ino = fs.fs_ino; |
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206 fs_dev = fs.fs_dev; |
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207 fs_nlink = fs.fs_nlink; |
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208 fs_uid = fs.fs_uid; |
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209 fs_gid = fs.fs_gid; |
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210 fs_size = fs.fs_size; |
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211 fs_atime = fs.fs_atime; |
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212 fs_mtime = fs.fs_mtime; |
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213 fs_ctime = fs.fs_ctime; |
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214 |
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215 #if defined (HAVE_ST_RDEV) |
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216 fs_rdev = fs.fs_rdev; |
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217 #endif |
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218 |
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219 #if defined (HAVE_ST_BLKSIZE) |
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220 fs_blksize = fs.fs_blksize; |
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221 #endif |
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222 |
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223 #if defined (HAVE_ST_BLOCKS) |
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224 fs_blocks = fs.fs_blocks; |
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225 #endif |
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226 } |
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227 |
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228 /* |
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229 ;;; Local Variables: *** |
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230 ;;; mode: C++ *** |
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231 ;;; End: *** |
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232 */ |
