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