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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 "safe-lstat.h" |
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38 #include "safe-stat.h" |
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39 #include "statdefs.h" |
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40 |
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41 // XXX FIXME XXX -- the is_* and mode_as_string functions are only valid |
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42 // for initialized objects. If called for an object that is not |
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43 // initialized, they should throw an exception. |
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44 |
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45 bool |
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46 file_stat::is_blk (void) const |
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47 { |
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48 return S_ISBLK (fs_mode); |
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49 } |
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50 |
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51 bool |
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52 file_stat::is_chr (void) const |
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53 { |
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54 return S_ISCHR (fs_mode); |
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55 } |
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56 |
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57 bool |
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58 file_stat::is_dir (void) const |
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59 { |
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60 return S_ISDIR (fs_mode); |
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61 } |
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62 |
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63 bool |
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64 file_stat::is_fifo (void) const |
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65 { |
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66 return S_ISFIFO (fs_mode); |
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67 } |
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68 |
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69 bool |
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70 file_stat::is_lnk (void) const |
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71 { |
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72 return S_ISLNK (fs_mode); |
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73 } |
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74 |
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75 bool |
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76 file_stat::is_reg (void) const |
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77 { |
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78 return S_ISREG (fs_mode); |
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79 } |
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80 |
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81 bool |
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82 file_stat::is_sock (void) const |
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83 { |
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84 return S_ISSOCK (fs_mode); |
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85 } |
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86 |
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87 extern "C" void mode_string (); |
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88 |
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89 string |
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90 file_stat::mode_as_string (void) const |
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91 { |
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92 char buf[11]; |
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93 |
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94 mode_string (fs_mode, buf); |
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95 |
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96 buf[10] = '\0'; |
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97 |
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98 return buf; |
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99 } |
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100 |
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101 // Private stuff: |
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102 |
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103 void |
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104 file_stat::update_internal (bool force) |
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105 { |
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106 if (! initialized || force) |
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107 { |
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108 initialized = false; |
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109 fail = false; |
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110 |
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111 const char *cname = file_name.c_str (); |
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112 |
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113 struct stat buf; |
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114 |
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115 int status = follow_links |
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116 ? safe_stat (cname, &buf) : safe_lstat (cname, &buf); |
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117 |
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118 if (status < 0) |
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119 { |
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120 fail = true; |
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121 errmsg = strerror (errno); |
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122 } |
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123 else |
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124 { |
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125 fs_mode = buf.st_mode; |
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126 fs_ino = buf.st_ino; |
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127 fs_dev = buf.st_dev; |
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128 fs_nlink = buf.st_nlink; |
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129 fs_uid = buf.st_uid; |
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130 fs_gid = buf.st_gid; |
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131 fs_size = buf.st_size; |
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132 fs_atime = buf.st_atime; |
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133 fs_mtime = buf.st_mtime; |
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134 fs_ctime = buf.st_ctime; |
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135 |
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136 #if defined (HAVE_ST_RDEV) |
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137 fs_rdev = buf.st_rdev; |
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138 #endif |
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139 |
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140 #if defined (HAVE_ST_BLKSIZE) |
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141 fs_blksize = buf.st_blksize; |
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142 #endif |
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143 |
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144 #if defined (HAVE_ST_BLOCKS) |
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145 fs_blocks = buf.st_blocks; |
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146 #endif |
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147 } |
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148 |
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149 initialized = true; |
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150 } |
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151 } |
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152 |
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153 // Functions for octave. |
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154 |
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155 // Has FILE been modified since TIME? Returns 1 for yes, 0 for no, |
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156 // and -1 for any error. |
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157 int |
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158 is_newer (const string& file, time_t time) |
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159 { |
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160 file_stat fs (file); |
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161 |
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162 return fs ? fs.is_newer (time) : -1; |
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163 } |
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164 |
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165 int |
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166 oct_mkdir (const string& name, mode_t mode) |
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167 { |
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168 return mkdir (name.c_str (), mode); |
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169 } |
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170 |
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171 int |
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172 oct_mkfifo (const string& name, mode_t mode) |
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173 { |
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174 return mkfifo (name.c_str (), mode); |
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175 } |
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176 |
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177 int |
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178 oct_rename (const string& from, const string& to) |
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179 { |
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180 return rename (from.c_str (), to.c_str ()); |
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181 } |
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182 |
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183 int |
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184 oct_rmdir (const string& name) |
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185 { |
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186 return rmdir (name.c_str ()); |
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187 } |
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188 |
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189 int |
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190 oct_umask (mode_t mode) |
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191 { |
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192 #if defined (HAVE_UMASK) |
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193 return umask (mode); |
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194 #else |
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195 return 0; |
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196 #endif |
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197 } |
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198 |
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199 int |
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200 oct_unlink (const string& name) |
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201 { |
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202 return unlink (name.c_str ()); |
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203 } |
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204 |
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205 /* |
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206 ;;; Local Variables: *** |
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207 ;;; mode: C++ *** |
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208 ;;; page-delimiter: "^/\\*" *** |
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209 ;;; End: *** |
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210 */ |
