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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 #ifdef HAVE_SYS_TYPES_H |
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33 #include <sys/types.h> |
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34 #endif |
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35 |
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36 #ifdef HAVE_UNISTD_H |
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37 #include <unistd.h> |
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38 #endif |
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39 |
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40 #include "file-ops.h" |
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41 #include "oct-env.h" |
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42 #include "oct-passwd.h" |
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43 #include "statdefs.h" |
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44 #include "str-vec.h" |
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45 |
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46 #define NOT_SUPPORTED(nm) \ |
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47 nm ## ": not supported on this system" |
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48 |
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49 // We provide a replacement for mkdir(). |
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50 |
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51 int |
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52 file_ops::mkdir (const string& name, mode_t mode) |
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53 { |
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54 string msg; |
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55 return mkdir (name, mode, msg); |
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56 } |
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57 |
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58 int |
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59 file_ops::mkdir (const string& name, mode_t mode, string& msg) |
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60 { |
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61 msg = string (); |
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62 |
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63 int status = -1; |
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64 |
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65 #if defined (HAVE_MKDIR) |
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66 status = ::mkdir (name.c_str (), mode); |
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67 |
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68 if (status < 0) |
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69 msg = ::strerror (errno); |
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70 #else |
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71 msg = NOT_SUPPORTED ("mkdir"); |
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72 #endif |
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73 |
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74 return status; |
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75 } |
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76 |
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77 // I don't know how to emulate this on systems that don't provide it. |
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78 |
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79 int |
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80 file_ops::mkfifo (const string& name, mode_t mode) |
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81 { |
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82 string msg; |
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83 return mkfifo (name, mode, msg); |
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84 } |
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85 |
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86 int |
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87 file_ops::mkfifo (const string& name, mode_t mode, string& msg) |
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88 { |
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89 msg = string (); |
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90 |
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91 int status = -1; |
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92 |
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93 #if defined (HAVE_MKFIFO) |
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94 status = ::mkfifo (name.c_str (), mode); |
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95 |
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96 if (status < 0) |
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97 msg = ::strerror (errno); |
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98 #else |
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99 msg = NOT_SUPPORTED ("mkfifo"); |
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100 #endif |
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101 |
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102 return status; |
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103 } |
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104 |
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105 // We provide a replacement for rename(). |
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106 |
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107 int |
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108 file_ops::rename (const string& from, const string& to) |
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109 { |
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110 string msg; |
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111 return rename (from, to, msg); |
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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 int status = -1; |
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118 |
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119 msg = string (); |
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120 |
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121 #if defined (HAVE_RENAME) |
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122 status = ::rename (from.c_str (), to.c_str ()); |
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123 |
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124 if (status < 0) |
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125 msg = ::strerror (errno); |
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126 #else |
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127 msg = NOT_SUPPORTED ("rename"); |
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128 #endif |
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129 |
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130 return status; |
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131 } |
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132 |
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133 // We provide a replacement for rmdir(). |
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134 |
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135 int |
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136 file_ops::rmdir (const string& name) |
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137 { |
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138 string msg; |
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139 return rmdir (name, msg); |
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140 } |
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141 |
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142 int |
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143 file_ops::rmdir (const string& name, string& msg) |
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144 { |
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145 msg = string (); |
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146 |
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147 int status = -1; |
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148 |
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149 #if defined (HAVE_RMDIR) |
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150 status = ::rmdir (name.c_str ()); |
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151 |
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152 if (status < 0) |
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153 msg = ::strerror (errno); |
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154 #else |
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155 msg = NOT_SUPPORTED ("rmdir"); |
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156 #endif |
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157 |
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158 return status; |
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159 } |
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160 |
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161 // We provide a replacement for tempnam(). |
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162 |
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163 string |
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164 file_ops::tempnam (const string& dir, const string& pfx) |
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165 { |
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166 string msg; |
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167 return tempnam (dir, pfx, msg); |
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168 } |
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169 |
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170 string |
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171 file_ops::tempnam (const string& dir, const string& pfx, string& msg) |
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172 { |
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173 msg = string (); |
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174 |
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175 string retval; |
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176 |
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177 const char *pdir = dir.empty () ? 0 : dir.c_str (); |
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178 |
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179 const char *ppfx = pfx.empty () ? 0 : pfx.c_str (); |
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180 |
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181 char *tmp = ::tempnam (pdir, ppfx); |
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182 |
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183 if (tmp) |
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184 { |
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185 retval = tmp; |
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186 |
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187 ::free (tmp); |
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188 } |
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189 else |
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190 msg = ::strerror (errno); |
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191 |
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192 return retval; |
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193 } |
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194 |
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195 // If NAME has a leading ~ or ~user, Unix-style, expand it to the |
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196 // user's home directory. If no ~, or no <pwd.h>, just return NAME. |
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197 |
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198 // Mostly stolen from kpathsea. Readline also has a more complicated |
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199 // tilde-expand function, but we can probalby get by with something a |
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200 // bit simpler. |
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201 |
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202 // XXX FIXME XXX |
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203 #define DIR_SEP_CHAR '/' |
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204 |
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205 string |
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206 file_ops::tilde_expand (const string& name) |
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207 { |
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208 string expansion = name; |
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209 |
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210 // If no leading tilde, do nothing. |
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211 |
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212 size_t beg = name.find_first_not_of (" \t"); |
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213 |
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214 if (beg != NPOS && name[beg] == '~') |
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215 { |
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216 // If `~' or `~/', use the user's home directory. If that is |
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217 // empty, just use ".". |
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218 |
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219 // If `~user' or `~user/', look up user in the passwd database. |
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220 |
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221 size_t len = name.length (); |
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222 |
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223 if (beg == len-1 || name[beg+1] == DIR_SEP_CHAR) |
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224 { |
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225 string home = octave_env::get_home_directory (); |
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226 |
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227 if (home.empty ()) |
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228 home = "."; |
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229 |
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230 expansion = name.substr (0, beg) + home; |
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231 |
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232 if (beg < len) |
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233 expansion.append (name.substr (beg+1)); |
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234 } |
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235 else |
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236 { |
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237 size_t end = name.find (DIR_SEP_CHAR, beg); |
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238 |
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239 size_t len = end; |
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240 |
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241 if (end != NPOS) |
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242 len -= beg + 1; |
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243 |
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244 string user = name.substr (beg+1, len); |
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245 |
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246 octave_passwd pw = octave_passwd::getpwnam (user); |
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247 |
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248 // If no such user, just return the original string. |
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249 |
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250 if (pw) |
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251 { |
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252 expansion = string (" ", beg) + pw.dir (); |
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253 |
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254 if (end != NPOS) |
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255 expansion.append (name.substr (end)); |
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256 } |
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257 else |
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258 expansion = name; |
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259 } |
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260 } |
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261 |
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262 return expansion; |
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263 } |
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264 |
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265 // A vector version of the above. |
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266 |
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267 string_vector |
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268 file_ops::tilde_expand (const string_vector& names) |
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269 { |
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270 string_vector retval; |
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271 |
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272 int n = names.length (); |
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273 |
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274 retval.resize (n); |
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275 |
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276 for (int i = 0; i < n; i++) |
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277 retval[i] = file_ops::tilde_expand (names[i]); |
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278 |
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279 return retval; |
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280 } |
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281 |
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282 int |
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283 file_ops::umask (mode_t mode) |
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284 { |
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285 #if defined (HAVE_UMASK) |
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286 return ::umask (mode); |
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287 #else |
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288 return 0; |
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289 #endif |
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290 } |
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291 |
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292 int |
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293 file_ops::unlink (const string& name) |
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294 { |
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295 string msg; |
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296 return unlink (name, msg); |
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297 } |
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298 |
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299 int |
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300 file_ops::unlink (const string& name, string& msg) |
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301 { |
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302 msg = string (); |
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303 |
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304 int status = -1; |
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305 |
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306 #if defined (HAVE_UNLINK) |
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307 status = ::unlink (name.c_str ()); |
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308 |
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309 if (status < 0) |
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310 msg = ::strerror (errno); |
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311 #else |
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312 msg = NOT_SUPPORTED ("unlink"); |
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313 #endif |
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314 |
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315 return status; |
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316 } |
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317 |
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318 /* |
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319 ;;; Local Variables: *** |
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320 ;;; mode: C++ *** |
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321 ;;; End: *** |
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322 */ |
