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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, 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 #include <iostream.h> |
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33 |
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34 #ifdef HAVE_SYS_TYPES_H |
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35 #include <sys/types.h> |
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36 #endif |
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37 |
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38 #ifdef HAVE_UNISTD_H |
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39 #include <unistd.h> |
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40 #endif |
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41 |
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42 #ifdef HAVE_PWD_H |
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43 #include <pwd.h> |
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44 #endif |
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45 |
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46 #include "file-ops.h" |
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47 #include "lo-error.h" |
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48 #include "oct-env.h" |
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49 #include "statdefs.h" |
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50 #include "str-vec.h" |
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51 |
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52 // We provide a replacement for mkdir(). |
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53 |
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54 int |
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55 file_ops::mkdir (const string& name, mode_t mode) |
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56 { |
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57 return ::mkdir (name.c_str (), mode); |
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58 } |
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59 |
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60 int |
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61 file_ops::mkdir (const string& name, mode_t mode, string& msg) |
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62 { |
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63 msg = string (); |
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64 |
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65 int status = ::mkdir (name.c_str (), mode); |
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66 |
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67 if (status < 0) |
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68 msg = ::strerror (errno); |
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69 |
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70 return status; |
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71 } |
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72 |
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73 // I don't know how to emulate this on systems that don't provide it. |
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74 |
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75 int |
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76 file_ops::mkfifo (const string& name, mode_t mode) |
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77 { |
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78 #if defined (HAVE_MKFIFO) |
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79 return ::mkfifo (name.c_str (), mode); |
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80 #else |
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81 (*current_liboctave_error_handler) |
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82 ("mkfifo: not implemented on this system"); |
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83 return -1; |
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84 #endif |
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85 } |
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86 |
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87 int |
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88 file_ops::mkfifo (const string& name, mode_t mode, string& msg) |
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89 { |
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90 msg = string (); |
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91 |
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92 #if defined (HAVE_MKFIFO) |
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93 int status = ::mkfifo (name.c_str (), mode); |
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94 |
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95 if (status < 0) |
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96 msg = ::strerror (errno); |
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97 |
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98 return status; |
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99 #else |
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100 (*current_liboctave_error_handler) |
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101 ("mkfifo: not implemented on this system"); |
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102 return -1; |
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103 #endif |
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104 } |
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105 |
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106 // We provide a replacement for rename(). |
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107 |
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108 int |
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109 file_ops::rename (const string& from, const string& to) |
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110 { |
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111 return ::rename (from.c_str (), to.c_str ()); |
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112 } |
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113 |
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114 int |
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115 file_ops::rename (const string& from, const string& to, string& msg) |
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116 { |
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117 msg = string (); |
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118 |
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119 int status = ::rename (from.c_str (), to.c_str ()); |
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120 |
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121 if (status < 0) |
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122 msg = ::strerror (errno); |
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123 |
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124 return status; |
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125 } |
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126 |
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127 // We provide a replacement for rmdir(). |
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128 |
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129 int |
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130 file_ops::rmdir (const string& name) |
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131 { |
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132 return ::rmdir (name.c_str ()); |
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133 } |
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134 |
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135 int |
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136 file_ops::rmdir (const string& name, string& msg) |
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137 { |
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138 msg = string (); |
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139 |
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140 int status = ::rmdir (name.c_str ()); |
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141 |
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142 if (status < 0) |
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143 msg = ::strerror (errno); |
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144 |
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145 return status; |
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146 } |
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147 |
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148 // We provide a replacement for tempnam(). |
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149 |
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150 string |
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151 file_ops::tempnam (void) |
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152 { |
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153 string retval; |
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154 |
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155 char *tmp = ::tempnam (0, "oct-"); |
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156 |
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157 if (tmp) |
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158 { |
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159 retval = tmp; |
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160 |
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161 free (tmp); |
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162 } |
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163 else |
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164 (*current_liboctave_error_handler) ("can't open temporary file!"); |
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165 |
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166 return retval; |
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167 } |
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168 |
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169 // If NAME has a leading ~ or ~user, Unix-style, expand it to the |
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170 // user's home directory. If no ~, or no <pwd.h>, just return NAME. |
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171 |
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172 // Mostly stolen from kpathsea. Readline also has a more complicated |
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173 // tilde-expand function, but we can probalby get by with something a |
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174 // bit simpler. |
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175 |
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176 // XXX FIXME XXX |
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177 #define DIR_SEP_CHAR '/' |
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178 |
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179 string |
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180 file_ops::tilde_expand (const string& name) |
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181 { |
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182 string expansion = name; |
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183 |
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184 #if defined (HAVE_PWD_H) |
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185 |
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186 // If no leading tilde, do nothing. |
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187 |
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188 size_t beg = name.find_first_not_of (" \t"); |
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189 |
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190 if (beg != NPOS && name[beg] == '~') |
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191 { |
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192 // If `~' or `~/', use $HOME if it exists, or `.' if it doesn't. |
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193 |
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194 // If `~user' or `~user/', look up user in the passwd database. |
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195 |
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196 size_t len = name.length (); |
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197 |
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198 if (beg == len-1 || name[beg+1] == DIR_SEP_CHAR) |
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199 { |
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200 string home = octave_env::get_home_directory (); |
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201 |
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202 if (home.empty ()) |
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203 home = "."; |
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204 |
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205 expansion = name.substr (0, beg) + home; |
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206 |
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207 if (beg < len) |
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208 expansion.append (name.substr (beg+1)); |
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209 } |
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210 else |
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211 { |
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212 size_t end = name.find (DIR_SEP_CHAR, beg); |
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213 |
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214 size_t len = end; |
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215 |
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216 if (len != NPOS) |
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217 len -= beg + 1; |
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218 |
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219 string user = name.substr (beg+1, len); |
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220 |
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221 struct passwd *p |
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222 = static_cast<struct passwd *> (::getpwnam (user.c_str ())); |
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223 |
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224 // If no such user, just use `.'. |
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225 |
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226 string home = p ? p->pw_dir : "."; |
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227 |
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228 expansion = string (" ", beg) + home; |
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229 |
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230 if (end != NPOS) |
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231 expansion.append (name.substr (end)); |
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232 } |
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233 } |
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234 |
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235 #endif |
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236 |
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237 return expansion; |
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238 } |
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239 |
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240 // A vector version of the above. |
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241 |
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242 string_vector |
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243 file_ops::tilde_expand (const string_vector& names) |
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244 { |
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245 string_vector retval; |
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246 |
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247 int n = names.length (); |
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248 |
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249 retval.resize (n); |
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250 |
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251 for (int i = 0; i < n; i++) |
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252 retval[i] = file_ops::tilde_expand (names[i]); |
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253 |
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254 return retval; |
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255 } |
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256 |
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257 int |
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258 file_ops::umask (mode_t mode) |
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259 { |
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260 #if defined (HAVE_UMASK) |
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261 return ::umask (mode); |
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262 #else |
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263 return 0; |
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264 #endif |
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265 } |
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266 |
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267 int |
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268 file_ops::unlink (const string& name) |
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269 { |
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270 return ::unlink (name.c_str ()); |
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271 } |
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272 |
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273 int |
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274 file_ops::unlink (const string& name, string& errmsg) |
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275 { |
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276 errmsg = string (); |
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277 |
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278 int status = ::unlink (name.c_str ()); |
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279 |
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280 if (status < 0) |
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281 errmsg = ::strerror (errno); |
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282 |
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283 return status; |
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284 } |
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285 |
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286 /* |
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287 ;;; Local Variables: *** |
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288 ;;; mode: C++ *** |
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289 ;;; End: *** |
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290 */ |
