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1 /* |
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2 |
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3 Copyright (C) 1996 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 <cstdio> |
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29 #include <cstdlib> |
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30 #include <cstring> |
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31 |
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32 #ifdef HAVE_UNISTD_H |
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33 #ifdef HAVE_SYS_TYPES_H |
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34 #include <sys/types.h> |
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35 #endif |
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36 #include <unistd.h> |
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37 #endif |
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38 |
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39 #include "error.h" |
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40 #include "file-ops.h" |
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41 #include "lo-error.h" |
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42 #include "statdefs.h" |
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43 |
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44 // These must come after <sys/types.h> and <sys/stat.h>. |
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45 |
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46 #include "safe-lstat.h" |
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47 #include "safe-stat.h" |
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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 return S_ISBLK (fs_mode); |
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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 return S_ISCHR (fs_mode); |
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63 } |
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64 |
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65 bool |
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66 file_stat::is_dir (void) const |
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67 { |
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68 return S_ISDIR (fs_mode); |
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69 } |
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70 |
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71 bool |
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72 file_stat::is_fifo (void) const |
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73 { |
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74 return S_ISFIFO (fs_mode); |
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75 } |
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76 |
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77 bool |
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78 file_stat::is_lnk (void) const |
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79 { |
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80 return S_ISLNK (fs_mode); |
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81 } |
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82 |
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83 bool |
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84 file_stat::is_reg (void) const |
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85 { |
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86 return S_ISREG (fs_mode); |
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87 } |
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88 |
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89 bool |
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90 file_stat::is_sock (void) const |
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91 { |
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92 return S_ISSOCK (fs_mode); |
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93 } |
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94 |
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95 extern "C" void mode_string (); |
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96 |
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97 string |
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98 file_stat::mode_as_string (void) const |
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99 { |
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100 char buf[11]; |
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101 |
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102 mode_string (fs_mode, buf); |
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103 |
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104 buf[10] = '\0'; |
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105 |
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106 return string (buf); |
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107 } |
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108 |
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109 // Private stuff: |
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110 |
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111 void |
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112 file_stat::update_internal (bool force) |
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113 { |
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114 if (! initialized || force) |
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115 { |
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116 initialized = false; |
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117 fail = false; |
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118 |
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119 const char *cname = file_name.c_str (); |
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120 |
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121 struct stat buf; |
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122 |
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123 int status = follow_links |
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124 ? SAFE_STAT (cname, &buf) : SAFE_LSTAT (cname, &buf); |
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125 |
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126 if (status < 0) |
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127 { |
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128 fail = true; |
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129 errmsg = strerror (errno); |
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130 } |
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131 else |
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132 { |
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133 fs_mode = buf.st_mode; |
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134 fs_ino = buf.st_ino; |
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135 fs_dev = buf.st_dev; |
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136 fs_nlink = buf.st_nlink; |
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137 fs_uid = buf.st_uid; |
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138 fs_gid = buf.st_gid; |
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139 fs_size = buf.st_size; |
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140 fs_atime = buf.st_atime; |
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141 fs_mtime = buf.st_mtime; |
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142 fs_ctime = buf.st_ctime; |
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143 |
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144 #if defined (HAVE_ST_RDEV) |
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145 fs_rdev = buf.st_rdev; |
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146 #endif |
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147 |
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148 #if defined (HAVE_ST_BLKSIZE) |
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149 fs_blksize = buf.st_blksize; |
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150 #endif |
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151 |
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152 #if defined (HAVE_ST_BLOCKS) |
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153 fs_blocks = buf.st_blocks; |
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154 #endif |
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155 } |
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156 |
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157 initialized = true; |
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158 } |
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159 } |
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160 |
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161 void |
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162 file_stat::copy (const file_stat& fs) |
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163 { |
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164 file_name = fs.file_name; |
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165 follow_links = fs.follow_links; |
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166 initialized = fs.initialized; |
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167 fail = fs.fail; |
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168 errmsg = fs.errmsg; |
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169 fs_mode = fs.fs_mode; |
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170 fs_ino = fs.fs_ino; |
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171 fs_dev = fs.fs_dev; |
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172 fs_nlink = fs.fs_nlink; |
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173 fs_uid = fs.fs_uid; |
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174 fs_gid = fs.fs_gid; |
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175 fs_size = fs.fs_size; |
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176 fs_atime = fs.fs_atime; |
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177 fs_mtime = fs.fs_mtime; |
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178 fs_ctime = fs.fs_ctime; |
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179 |
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180 #if defined (HAVE_ST_RDEV) |
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181 fs_rdev = fs.fs_rdev; |
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182 #endif |
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183 |
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184 #if defined (HAVE_ST_BLKSIZE) |
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185 fs_blksize = fs.fs_blksize; |
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186 #endif |
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187 |
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188 #if defined (HAVE_ST_BLOCKS) |
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189 fs_blocks = fs.fs_blocks; |
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190 #endif |
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191 } |
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192 |
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193 // Functions for octave. |
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194 |
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195 // Has FILE been modified since TIME? Returns 1 for yes, 0 for no, |
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196 // and -1 for any error. |
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197 int |
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198 is_newer (const string& file, time_t time) |
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199 { |
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200 file_stat fs (file); |
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201 |
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202 return fs ? fs.is_newer (time) : -1; |
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203 } |
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204 |
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205 // We provide a replacement for mkdir(). |
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206 |
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207 int |
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208 oct_mkdir (const string& name, mode_t mode) |
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209 { |
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210 return mkdir (name.c_str (), mode); |
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211 } |
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212 |
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213 // I don't know how to emulate this on systems that don't provide it. |
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214 |
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215 int |
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216 oct_mkfifo (const string& name, mode_t mode) |
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217 { |
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218 #if defined (HAVE_MKFIFO) |
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219 return mkfifo (name.c_str (), mode); |
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220 #else |
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221 ::error ("mkfifo: not implemented on this system"); |
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222 return -1; |
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223 #endif |
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224 } |
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225 |
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226 // We provide a replacement for rename(). |
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227 |
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228 int |
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229 oct_rename (const string& from, const string& to) |
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230 { |
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231 return rename (from.c_str (), to.c_str ()); |
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232 } |
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233 |
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234 // We provide a replacement for rmdir(). |
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235 |
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236 int |
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237 oct_rmdir (const string& name) |
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238 { |
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239 return rmdir (name.c_str ()); |
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240 } |
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241 |
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242 // We provide a replacement for tempnam(). |
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243 |
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244 string |
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245 oct_tempnam (void) |
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246 { |
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247 string retval; |
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248 |
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249 char *tmp = tempnam (0, "oct-"); |
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250 |
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251 if (tmp) |
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252 { |
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253 retval = tmp; |
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254 |
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255 free (tmp); |
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256 } |
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257 else |
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258 (*current_liboctave_error_handler) ("can't open temporary file!"); |
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259 |
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260 return retval; |
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261 } |
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262 |
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263 |
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264 int |
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265 oct_umask (mode_t mode) |
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266 { |
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267 #if defined (HAVE_UMASK) |
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268 return umask (mode); |
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269 #else |
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270 return 0; |
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271 #endif |
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272 } |
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273 |
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274 int |
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275 oct_unlink (const string& name) |
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276 { |
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277 return unlink (name.c_str ()); |
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278 } |
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279 |
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280 /* |
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281 ;;; Local Variables: *** |
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282 ;;; mode: C++ *** |
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283 ;;; End: *** |
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284 */ |
