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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cerrno> |
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29 #include <cstring> |
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30 |
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31 #ifdef HAVE_UNISTD_H |
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32 #ifdef HAVE_SYS_TYPES_H |
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33 #include <sys/types.h> |
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34 #endif |
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35 #include <unistd.h> |
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36 #endif |
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37 |
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38 #include "file-stat.h" |
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39 #include "statdefs.h" |
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40 |
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41 #if !defined (HAVE_LSTAT) |
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42 static inline int |
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43 lstat (const char *name, struct stat *buf) |
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44 { |
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45 return stat (name, buf); |
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46 } |
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47 #endif |
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48 |
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49 // XXX FIXME XXX -- the is_* and mode_as_string functions are only valid |
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50 // for initialized objects. If called for an object that is not |
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51 // initialized, they should throw an exception. |
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52 |
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53 bool |
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54 file_stat::is_blk (void) const |
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55 { |
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56 #ifdef S_ISBLK |
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57 return S_ISBLK (fs_mode); |
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58 #else |
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59 return false; |
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60 #endif |
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61 } |
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62 |
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63 bool |
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64 file_stat::is_chr (void) const |
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65 { |
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66 #ifdef S_ISCHR |
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67 return S_ISCHR (fs_mode); |
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68 #else |
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69 return false; |
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70 #endif |
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71 } |
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72 |
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73 bool |
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74 file_stat::is_dir (void) const |
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75 { |
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76 #ifdef S_ISDIR |
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77 return S_ISDIR (fs_mode); |
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78 #else |
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79 return false; |
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80 #endif |
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81 } |
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82 |
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83 bool |
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84 file_stat::is_fifo (void) const |
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85 { |
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86 #ifdef S_ISFIFO |
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87 return S_ISFIFO (fs_mode); |
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88 #else |
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89 return false; |
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90 #endif |
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91 } |
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92 |
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93 bool |
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94 file_stat::is_lnk (void) const |
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95 { |
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96 #ifdef S_ISLNK |
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97 return S_ISLNK (fs_mode); |
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98 #else |
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99 return false; |
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100 #endif |
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101 } |
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102 |
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103 bool |
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104 file_stat::is_reg (void) const |
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105 { |
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106 #ifdef S_ISREG |
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107 return S_ISREG (fs_mode); |
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108 #else |
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109 return false; |
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110 #endif |
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111 } |
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112 |
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113 bool |
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114 file_stat::is_sock (void) const |
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115 { |
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116 #ifdef S_ISSOCK |
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117 return S_ISSOCK (fs_mode); |
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118 #else |
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119 return false; |
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120 #endif |
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121 } |
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122 |
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123 extern "C" void mode_string (unsigned short, char *); |
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124 |
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125 std::string |
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126 file_stat::mode_as_string (void) const |
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127 { |
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128 char buf[11]; |
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129 |
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130 mode_string (fs_mode, buf); |
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131 |
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132 buf[10] = '\0'; |
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133 |
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134 return std::string (buf); |
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135 } |
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136 |
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137 // Has FILE been modified since TIME? Returns 1 for yes, 0 for no, |
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138 // and -1 for any error. |
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139 |
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140 int |
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141 file_stat::is_newer (const std::string& file, const octave_time& time) |
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142 { |
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143 file_stat fs (file); |
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144 |
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145 return fs ? fs.is_newer (time) : -1; |
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146 } |
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147 |
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148 // Private stuff: |
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149 |
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150 void |
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151 file_stat::update_internal (bool force) |
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152 { |
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153 if (! initialized || force) |
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154 { |
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155 initialized = false; |
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156 fail = false; |
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157 |
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158 const char *cname = file_name.c_str (); |
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159 |
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160 struct stat buf; |
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161 |
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162 int status = follow_links ? stat (cname, &buf) : lstat (cname, &buf); |
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163 |
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164 if (status < 0) |
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165 { |
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166 using namespace std; |
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167 |
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168 fail = true; |
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169 errmsg = strerror (errno); |
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170 } |
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171 else |
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172 { |
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173 fs_mode = buf.st_mode; |
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174 fs_ino = buf.st_ino; |
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175 fs_dev = buf.st_dev; |
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176 fs_nlink = buf.st_nlink; |
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177 fs_uid = buf.st_uid; |
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178 fs_gid = buf.st_gid; |
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179 fs_size = buf.st_size; |
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180 fs_atime = buf.st_atime; |
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181 fs_mtime = buf.st_mtime; |
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182 fs_ctime = buf.st_ctime; |
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183 |
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184 #if defined (HAVE_STRUCT_STAT_ST_RDEV) |
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185 fs_rdev = buf.st_rdev; |
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186 #endif |
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187 |
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188 #if defined (HAVE_STRUCT_STAT_ST_BLKSIZE) |
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189 fs_blksize = buf.st_blksize; |
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190 #endif |
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191 |
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192 #if defined (HAVE_STRUCT_STAT_ST_BLOCKS) |
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193 fs_blocks = buf.st_blocks; |
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194 #endif |
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195 } |
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196 |
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197 initialized = true; |
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198 } |
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199 } |
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200 |
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201 void |
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202 file_stat::copy (const file_stat& fs) |
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203 { |
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204 file_name = fs.file_name; |
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205 follow_links = fs.follow_links; |
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206 initialized = fs.initialized; |
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207 fail = fs.fail; |
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208 errmsg = fs.errmsg; |
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209 fs_mode = fs.fs_mode; |
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210 fs_ino = fs.fs_ino; |
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211 fs_dev = fs.fs_dev; |
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212 fs_nlink = fs.fs_nlink; |
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213 fs_uid = fs.fs_uid; |
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214 fs_gid = fs.fs_gid; |
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215 fs_size = fs.fs_size; |
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216 fs_atime = fs.fs_atime; |
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217 fs_mtime = fs.fs_mtime; |
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218 fs_ctime = fs.fs_ctime; |
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219 |
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220 #if defined (HAVE_STRUCT_STAT_ST_RDEV) |
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221 fs_rdev = fs.fs_rdev; |
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222 #endif |
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223 |
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224 #if defined (HAVE_STRUCT_STAT_ST_BLKSIZE) |
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225 fs_blksize = fs.fs_blksize; |
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226 #endif |
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227 |
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228 #if defined (HAVE_STRUCT_STAT_ST_BLOCKS) |
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229 fs_blocks = fs.fs_blocks; |
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230 #endif |
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231 } |
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232 |
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233 /* |
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234 ;;; Local Variables: *** |
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235 ;;; mode: C++ *** |
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236 ;;; End: *** |
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237 */ |
