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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 <cstdio> |
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30 #include <cstdlib> |
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31 #include <cstring> |
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32 |
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33 #ifdef HAVE_UNISTD_H |
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34 #include <sys/types.h> |
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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-ops.h" |
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39 #include "lo-error.h" |
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40 #include "statdefs.h" |
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41 |
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42 // These must come after <sys/types.h> and <sys/stat.h>. |
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43 |
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44 #include "safe-lstat.h" |
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45 #include "safe-stat.h" |
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46 |
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47 // XXX FIXME XXX -- the is_* and mode_as_string functions are only valid |
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48 // for initialized objects. If called for an object that is not |
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49 // initialized, they should throw an exception. |
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50 |
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51 bool |
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52 file_stat::is_blk (void) const |
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53 { |
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54 return S_ISBLK (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_chr (void) const |
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59 { |
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60 return S_ISCHR (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_dir (void) const |
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65 { |
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66 return S_ISDIR (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_fifo (void) const |
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71 { |
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72 return S_ISFIFO (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_lnk (void) const |
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77 { |
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78 return S_ISLNK (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_reg (void) const |
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83 { |
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84 return S_ISREG (fs_mode); |
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85 } |
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86 |
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87 bool |
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88 file_stat::is_sock (void) const |
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89 { |
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90 return S_ISSOCK (fs_mode); |
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91 } |
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92 |
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93 extern "C" void mode_string (); |
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94 |
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95 string |
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96 file_stat::mode_as_string (void) const |
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97 { |
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98 char buf[11]; |
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99 |
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100 mode_string (fs_mode, buf); |
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101 |
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102 buf[10] = '\0'; |
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103 |
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104 return buf; |
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105 } |
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106 |
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107 // Private stuff: |
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108 |
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109 void |
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110 file_stat::update_internal (bool force) |
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111 { |
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112 if (! initialized || force) |
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113 { |
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114 initialized = false; |
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115 fail = false; |
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116 |
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117 const char *cname = file_name.c_str (); |
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118 |
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119 struct stat buf; |
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120 |
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121 int status = follow_links |
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122 ? SAFE_STAT (cname, &buf) : SAFE_LSTAT (cname, &buf); |
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123 |
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124 if (status < 0) |
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125 { |
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126 fail = true; |
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127 errmsg = strerror (errno); |
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128 } |
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129 else |
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130 { |
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131 fs_mode = buf.st_mode; |
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132 fs_ino = buf.st_ino; |
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133 fs_dev = buf.st_dev; |
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134 fs_nlink = buf.st_nlink; |
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135 fs_uid = buf.st_uid; |
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136 fs_gid = buf.st_gid; |
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137 fs_size = buf.st_size; |
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138 fs_atime = buf.st_atime; |
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139 fs_mtime = buf.st_mtime; |
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140 fs_ctime = buf.st_ctime; |
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141 |
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142 #if defined (HAVE_ST_RDEV) |
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143 fs_rdev = buf.st_rdev; |
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144 #endif |
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145 |
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146 #if defined (HAVE_ST_BLKSIZE) |
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147 fs_blksize = buf.st_blksize; |
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148 #endif |
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149 |
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150 #if defined (HAVE_ST_BLOCKS) |
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151 fs_blocks = buf.st_blocks; |
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152 #endif |
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153 } |
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154 |
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155 initialized = true; |
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156 } |
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157 } |
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158 |
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159 void |
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160 file_stat::copy (const file_stat& fs) |
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161 { |
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162 file_name = fs.file_name; |
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163 follow_links = fs.follow_links; |
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164 initialized = fs.initialized; |
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165 fail = fs.fail; |
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166 errmsg = fs.errmsg; |
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167 fs_mode = fs.fs_mode; |
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168 fs_ino = fs.fs_ino; |
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169 fs_dev = fs.fs_dev; |
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170 fs_nlink = fs.fs_nlink; |
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171 fs_uid = fs.fs_uid; |
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172 fs_gid = fs.fs_gid; |
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173 fs_size = fs.fs_size; |
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174 fs_atime = fs.fs_atime; |
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175 fs_mtime = fs.fs_mtime; |
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176 fs_ctime = fs.fs_ctime; |
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177 |
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178 #if defined (HAVE_ST_RDEV) |
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179 fs_rdev = fs.fs_rdev; |
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180 #endif |
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181 |
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182 #if defined (HAVE_ST_BLKSIZE) |
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183 fs_blksize = fs.fs_blksize; |
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184 #endif |
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185 |
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186 #if defined (HAVE_ST_BLOCKS) |
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187 fs_blocks = fs.fs_blocks; |
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188 #endif |
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189 } |
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190 |
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191 // Functions for octave. |
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192 |
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193 // Has FILE been modified since TIME? Returns 1 for yes, 0 for no, |
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194 // and -1 for any error. |
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195 int |
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196 is_newer (const string& file, time_t time) |
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197 { |
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198 file_stat fs (file); |
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199 |
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200 return fs ? fs.is_newer (time) : -1; |
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201 } |
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202 |
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203 int |
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204 oct_mkdir (const string& name, mode_t mode) |
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205 { |
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206 return mkdir (name.c_str (), mode); |
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207 } |
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208 |
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209 int |
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210 oct_mkfifo (const string& name, mode_t mode) |
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211 { |
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212 return mkfifo (name.c_str (), mode); |
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213 } |
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214 |
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215 int |
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216 oct_rename (const string& from, const string& to) |
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217 { |
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218 return rename (from.c_str (), to.c_str ()); |
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219 } |
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220 |
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221 int |
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222 oct_rmdir (const string& name) |
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223 { |
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224 return rmdir (name.c_str ()); |
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225 } |
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226 |
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227 string |
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228 oct_tempnam (void) |
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229 { |
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230 string retval; |
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231 |
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232 char *tmp = tempnam (0, "oct-"); |
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233 |
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234 if (tmp) |
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235 { |
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236 retval = tmp; |
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237 |
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238 free (tmp); |
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239 } |
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240 else |
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241 (*current_liboctave_error_handler) ("can't open temporary file!"); |
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242 |
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243 return retval; |
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244 } |
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245 |
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246 |
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247 int |
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248 oct_umask (mode_t mode) |
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249 { |
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250 #if defined (HAVE_UMASK) |
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251 return umask (mode); |
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252 #else |
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253 return 0; |
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254 #endif |
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255 } |
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256 |
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257 int |
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258 oct_unlink (const string& name) |
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259 { |
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260 return unlink (name.c_str ()); |
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261 } |
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262 |
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263 /* |
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264 ;;; Local Variables: *** |
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265 ;;; mode: C++ *** |
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266 ;;; page-delimiter: "^/\\*" *** |
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267 ;;; End: *** |
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268 */ |
