Mercurial > octave
annotate liboctave/system/file-ops.cc @ 21733:cb0fdd941d84
use namespace for system file_ops class
* file-ops.h, file-ops.cc: Put file_ops class and related functions in
octave::sys:: namespace. Change all uses.
author | John W. Eaton <jwe@octave.org> |
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date | Thu, 19 May 2016 00:33:18 -0400 |
parents | 6a1eded90355 |
children | 11af9c03400c |
rev | line source |
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1765 | 1 /* |
2 | |
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3 Copyright (C) 1996-2015 John W. Eaton |
1765 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
1765 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
1765 | 20 |
21 */ | |
22 | |
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23 #if defined (HAVE_CONFIG_H) |
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24 # include "config.h" |
1765 | 25 #endif |
26 | |
27 #include <cerrno> | |
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28 #include <cstdio> |
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29 #include <cstdlib> |
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30 #include <cstring> |
1765 | 31 |
3503 | 32 #include <iostream> |
4726 | 33 #include <vector> |
3040 | 34 |
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35 #include <sys/stat.h> |
1765 | 36 #include <sys/types.h> |
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37 #include <unistd.h> |
2926 | 38 |
10279 | 39 #include "pathmax.h" |
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40 #include "canonicalize.h" |
1765 | 41 |
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42 extern "C" { |
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43 #include <tempname.h> |
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44 } |
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45 |
5476 | 46 #include "dir-ops.h" |
1765 | 47 #include "file-ops.h" |
5476 | 48 #include "file-stat.h" |
2926 | 49 #include "oct-env.h" |
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50 #include "oct-locbuf.h" |
2934 | 51 #include "oct-passwd.h" |
3710 | 52 #include "pathlen.h" |
5476 | 53 #include "quit.h" |
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54 #include "singleton-cleanup.h" |
2926 | 55 #include "str-vec.h" |
1765 | 56 |
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57 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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58 # include <algorithm> |
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59 #endif |
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60 |
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61 namespace |
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62 octave |
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63 { |
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64 namespace |
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65 sys |
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66 { |
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67 file_ops *octave::sys::file_ops::instance = 0; |
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68 |
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69 bool |
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70 octave::sys::file_ops::instance_ok (void) |
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71 { |
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72 bool retval = true; |
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73 |
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74 if (! instance) |
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75 { |
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76 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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77 char system_dir_sep_char = '\\'; |
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78 std::string system_dir_sep_str = "\\"; |
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79 #else |
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80 char system_dir_sep_char = '/'; |
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81 std::string system_dir_sep_str = "/"; |
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82 #endif |
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83 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) |
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84 std::string system_dir_sep_chars = "/\\"; |
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85 #else |
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86 std::string system_dir_sep_chars = system_dir_sep_str; |
5138 | 87 #endif |
88 | |
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89 instance = new file_ops (system_dir_sep_char, system_dir_sep_str, |
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90 system_dir_sep_chars); |
6271 | 91 |
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92 if (instance) |
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93 singleton_cleanup_list::add (cleanup_instance); |
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94 } |
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95 |
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96 if (! instance) |
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97 (*current_liboctave_error_handler) |
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98 ("unable to create file_ops object!"); |
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99 |
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100 return retval; |
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101 } |
5138 | 102 |
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103 // The following tilde-expansion code was stolen and adapted from |
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104 // readline. |
1802 | 105 |
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106 // The default value of tilde_additional_prefixes. This is set to |
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107 // whitespace preceding a tilde so that simple programs which do not |
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108 // perform any word separation get desired behavior. |
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109 static const char *default_prefixes[] = { " ~", "\t~", ":~", 0 }; |
2926 | 110 |
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111 // The default value of tilde_additional_suffixes. This is set to |
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112 // whitespace or newline so that simple programs which do not perform |
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113 // any word separation get desired behavior. |
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114 static const char *default_suffixes[] = { " ", "\n", ":", 0 }; |
3040 | 115 |
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116 // If non-null, this contains the address of a function that the |
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117 // application wants called before trying the standard tilde |
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118 // expansions. The function is called with the text sans tilde, and |
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119 // returns a malloc()'ed string which is the expansion, or a NULL |
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120 // pointer if the expansion fails. |
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121 octave::sys::file_ops::tilde_expansion_hook octave::sys::file_ops::tilde_expansion_preexpansion_hook = 0; |
3040 | 122 |
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123 // If non-null, this contains the address of a function to call if the |
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124 // standard meaning for expanding a tilde fails. The function is |
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125 // called with the text (sans tilde, as in "foo"), and returns a |
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126 // malloc()'ed string which is the expansion, or a NULL pointer if |
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127 // there is no expansion. |
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128 octave::sys::file_ops::tilde_expansion_hook octave::sys::file_ops::tilde_expansion_failure_hook = 0; |
3040 | 129 |
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130 // When non-null, this is a NULL terminated array of strings which are |
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131 // duplicates for a tilde prefix. Bash uses this to expand '=~' and |
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132 // ':~'. |
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133 string_vector octave::sys::file_ops::tilde_additional_prefixes = default_prefixes; |
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135 // When non-null, this is a NULL terminated array of strings which |
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136 // match the end of a username, instead of just "/". Bash sets this |
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137 // to ':' and '=~'. |
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138 string_vector octave::sys::file_ops::tilde_additional_suffixes = default_suffixes; |
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140 // Find the start of a tilde expansion in S, and return the index |
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141 // of the tilde which starts the expansion. Place the length of the |
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142 // text which identified this tilde starter in LEN, excluding the |
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143 // tilde itself. |
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145 static size_t |
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146 tilde_find_prefix (const std::string& s, size_t& len) |
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147 { |
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148 len = 0; |
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149 |
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150 size_t s_len = s.length (); |
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152 if (s_len == 0 || s[0] == '~') |
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153 return 0; |
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155 string_vector prefixes = octave::sys::file_ops::tilde_additional_prefixes; |
3040 | 156 |
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157 if (! prefixes.empty ()) |
10180 | 158 { |
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159 for (size_t i = 0; i < s_len; i++) |
10180 | 160 { |
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161 for (int j = 0; j < prefixes.numel (); j++) |
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162 { |
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163 size_t pfx_len = prefixes[j].length (); |
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165 if (prefixes[j] == s.substr (i, pfx_len)) |
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166 { |
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167 len = pfx_len - 1; |
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168 return i + len; |
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169 } |
10180 | 170 } |
171 } | |
172 } | |
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173 |
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174 return s_len; |
3040 | 175 } |
176 | |
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177 // Find the end of a tilde expansion in S, and return the index |
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178 // of the character which ends the tilde definition. |
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180 static size_t |
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181 tilde_find_suffix (const std::string& s) |
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182 { |
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183 size_t s_len = s.length (); |
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185 string_vector suffixes = octave::sys::file_ops::tilde_additional_suffixes; |
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186 |
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187 size_t i = 0; |
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189 for ( ; i < s_len; i++) |
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190 { |
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191 if (octave::sys::file_ops::is_dir_sep (s[i])) |
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192 break; |
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194 if (! suffixes.empty ()) |
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196 for (int j = 0; j < suffixes.numel (); j++) |
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197 { |
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198 size_t sfx_len = suffixes[j].length (); |
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200 if (suffixes[j] == s.substr (i, sfx_len)) |
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201 return i; |
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202 } |
10180 | 203 } |
204 } | |
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205 |
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206 return i; |
3040 | 207 } |
208 | |
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209 // Take FNAME and return the tilde prefix we want expanded. |
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211 static std::string |
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212 isolate_tilde_prefix (const std::string& fname) |
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213 { |
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214 size_t f_len = fname.length (); |
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216 size_t len = 1; |
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218 while (len < f_len && ! octave::sys::file_ops::is_dir_sep (fname[len])) |
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219 len++; |
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221 return fname.substr (1, len); |
3040 | 222 } |
223 | |
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224 // Do the work of tilde expansion on FILENAME. FILENAME starts with a |
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225 // tilde. |
3040 | 226 |
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227 static std::string |
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228 tilde_expand_word (const std::string& filename) |
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229 { |
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230 size_t f_len = filename.length (); |
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231 |
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232 if (f_len == 0 || filename[0] != '~') |
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233 return filename; |
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235 // A leading '~/' or a bare '~' is *always* translated to the value |
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236 // of $HOME or the home directory of the current user, regardless of |
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237 // any preexpansion hook. |
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238 |
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239 if (f_len == 1 || octave::sys::file_ops::is_dir_sep (filename[1])) |
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240 return octave::sys::env::get_home_directory () + filename.substr (1); |
3040 | 241 |
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242 std::string username = isolate_tilde_prefix (filename); |
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243 |
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244 size_t user_len = username.length (); |
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245 |
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246 std::string dirname; |
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247 |
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248 if (octave::sys::file_ops::tilde_expansion_preexpansion_hook) |
10180 | 249 { |
250 std::string expansion | |
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251 = octave::sys::file_ops::tilde_expansion_preexpansion_hook (username); |
3040 | 252 |
10180 | 253 if (! expansion.empty ()) |
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254 return expansion + filename.substr (user_len+1); |
10180 | 255 } |
3040 | 256 |
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257 // No preexpansion hook, or the preexpansion hook failed. Look in the |
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258 // password database. |
3040 | 259 |
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260 octave::sys::password pw = octave::sys::password::getpwnam (username); |
3040 | 261 |
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262 if (! pw) |
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263 { |
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264 // If the calling program has a special syntax for expanding tildes, |
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265 // and we couldn't find a standard expansion, then let them try. |
3040 | 266 |
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267 if (octave::sys::file_ops::tilde_expansion_failure_hook) |
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268 { |
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269 std::string expansion |
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270 = octave::sys::file_ops::tilde_expansion_failure_hook (username); |
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271 |
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272 if (! expansion.empty ()) |
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273 dirname = expansion + filename.substr (user_len+1); |
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274 } |
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275 |
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276 // If we don't have a failure hook, or if the failure hook did not |
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277 // expand the tilde, return a copy of what we were passed. |
3040 | 278 |
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279 if (dirname.length () == 0) |
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280 dirname = filename; |
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281 } |
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282 else |
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283 dirname = pw.dir () + filename.substr (user_len+1); |
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285 return dirname; |
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286 } |
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287 |
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288 // If NAME has a leading ~ or ~user, Unix-style, expand it to the |
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289 // user's home directory. If no ~, or no <pwd.h>, just return NAME. |
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290 |
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291 std::string |
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292 octave::sys::file_ops::tilde_expand (const std::string& name) |
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293 { |
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294 if (name.find ('~') == std::string::npos) |
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295 return name; |
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296 else |
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297 { |
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298 std::string result; |
2926 | 299 |
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300 size_t name_len = name.length (); |
2947 | 301 |
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302 // Scan through S expanding tildes as we come to them. |
3040 | 303 |
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304 size_t pos = 0; |
2926 | 305 |
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306 while (1) |
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307 { |
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308 if (pos > name_len) |
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309 break; |
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310 |
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311 size_t len; |
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313 // Make START point to the tilde which starts the expansion. |
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314 |
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315 size_t start = tilde_find_prefix (name.substr (pos), len); |
2926 | 316 |
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317 result.append (name.substr (pos, start)); |
2926 | 318 |
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319 // Advance STRING to the starting tilde. |
2926 | 320 |
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321 pos += start; |
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323 // Make FINI be the index of one after the last character of the |
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324 // username. |
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325 |
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326 size_t fini = tilde_find_suffix (name.substr (pos)); |
1802 | 327 |
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328 // If both START and FINI are zero, we are all done. |
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329 |
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330 if (! (start || fini)) |
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331 break; |
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332 |
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333 // Expand the entire tilde word, and copy it into RESULT. |
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334 |
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335 std::string tilde_word = name.substr (pos, fini); |
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336 |
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337 pos += fini; |
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338 |
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339 std::string expansion = tilde_expand_word (tilde_word); |
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340 |
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341 result.append (expansion); |
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342 } |
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343 |
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344 return result; |
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345 } |
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346 } |
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347 |
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348 // A vector version of the above. |
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349 |
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350 string_vector |
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351 octave::sys::file_ops::tilde_expand (const string_vector& names) |
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352 { |
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353 string_vector retval; |
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354 |
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355 int n = names.numel (); |
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356 |
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357 retval.resize (n); |
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358 |
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359 for (int i = 0; i < n; i++) |
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360 retval[i] = tilde_expand (names[i]); |
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361 |
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362 return retval; |
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363 } |
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364 |
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365 std::string |
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366 octave::sys::file_ops::concat (const std::string& dir, const std::string& file) |
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367 { |
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368 return dir.empty () |
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369 ? file |
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370 : (is_dir_sep (dir[dir.length ()-1]) |
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371 ? dir + file |
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372 : dir + dir_sep_char () + file); |
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373 } |
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374 |
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375 std::string |
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376 octave::sys::file_ops::native_separator_path (const std::string& path) |
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377 { |
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378 std::string retval; |
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379 |
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380 if (dir_sep_char () == '/') |
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381 retval = path; |
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382 else |
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383 { |
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384 size_t n = path.length (); |
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385 for (size_t i = 0; i < n; i++) |
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386 { |
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387 if (path[i] == '/') |
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388 retval += dir_sep_char(); |
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389 else |
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390 retval += path[i]; |
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391 } |
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392 } |
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393 |
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394 return retval; |
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395 } |
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396 |
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397 int |
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398 mkdir (const std::string& nm, mode_t md) |
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399 { |
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400 std::string msg; |
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401 return octave::sys::mkdir (nm, md, msg); |
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402 } |
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403 |
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404 int |
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405 mkdir (const std::string& name, mode_t mode, std::string& msg) |
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406 { |
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407 msg = ""; |
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408 |
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409 int status = -1; |
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410 |
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411 status = gnulib::mkdir (name.c_str (), mode); |
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412 |
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413 if (status < 0) |
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414 msg = gnulib::strerror (errno); |
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415 |
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416 return status; |
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417 } |
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418 |
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419 int |
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420 mkfifo (const std::string& nm, mode_t md) |
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421 { |
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422 std::string msg; |
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423 return mkfifo (nm, md, msg); |
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424 } |
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425 |
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426 int |
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427 mkfifo (const std::string& name, mode_t mode, std::string& msg) |
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428 { |
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429 msg = ""; |
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430 |
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431 int status = -1; |
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432 |
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433 // With gnulib we will always have mkfifo, but some systems like MinGW |
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434 // don't have working mkfifo functions. On those systems, mkfifo will |
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435 // always return -1 and set errno. |
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436 |
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437 status = gnulib::mkfifo (name.c_str (), mode); |
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438 |
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439 if (status < 0) |
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440 msg = gnulib::strerror (errno); |
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441 |
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442 return status; |
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443 } |
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444 |
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445 int |
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446 link (const std::string& old_name, const std::string& new_name) |
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447 { |
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448 std::string msg; |
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449 return link (old_name, new_name, msg); |
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450 } |
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451 |
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452 int |
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453 link (const std::string& old_name, const std::string& new_name, |
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454 std::string& msg) |
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455 { |
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456 msg = ""; |
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457 |
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458 int status = -1; |
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459 |
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460 status = gnulib::link (old_name.c_str (), new_name.c_str ()); |
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461 |
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462 if (status < 0) |
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463 msg = gnulib::strerror (errno); |
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464 |
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465 return status; |
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466 } |
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467 |
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468 int |
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469 symlink (const std::string& old_name, const std::string& new_name) |
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470 { |
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471 std::string msg; |
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472 return symlink (old_name, new_name, msg); |
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473 } |
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474 |
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475 int |
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476 symlink (const std::string& old_name, |
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477 const std::string& new_name, std::string& msg) |
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478 { |
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479 msg = ""; |
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480 |
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481 int status = -1; |
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482 |
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483 status = gnulib::symlink (old_name.c_str (), new_name.c_str ()); |
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484 |
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485 if (status < 0) |
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486 msg = gnulib::strerror (errno); |
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487 |
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488 return status; |
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489 } |
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490 |
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491 int |
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492 readlink (const std::string& path, std::string& result) |
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493 { |
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494 std::string msg; |
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495 return readlink (path, result, msg); |
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496 } |
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497 |
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498 int |
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499 readlink (const std::string& path, std::string& result, std::string& msg) |
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500 { |
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501 int status = -1; |
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502 |
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503 msg = ""; |
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504 |
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505 char buf[MAXPATHLEN+1]; |
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506 |
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507 status = gnulib::readlink (path.c_str (), buf, MAXPATHLEN); |
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508 |
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509 if (status < 0) |
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510 msg = gnulib::strerror (errno); |
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511 else |
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512 { |
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513 buf[status] = '\0'; |
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514 result = std::string (buf); |
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515 status = 0; |
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516 } |
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517 |
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518 return status; |
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519 } |
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520 |
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521 int |
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522 rename (const std::string& from, const std::string& to) |
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523 { |
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524 std::string msg; |
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525 return rename (from, to, msg); |
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526 } |
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527 |
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528 int |
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529 rename (const std::string& from, const std::string& to, std::string& msg) |
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530 { |
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531 int status = -1; |
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532 |
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533 msg = ""; |
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534 |
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535 status = gnulib::rename (from.c_str (), to.c_str ()); |
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536 |
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537 if (status < 0) |
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538 msg = gnulib::strerror (errno); |
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539 |
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540 return status; |
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541 } |
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542 |
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543 int |
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544 rmdir (const std::string& name) |
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545 { |
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546 std::string msg; |
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547 return rmdir (name, msg); |
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548 } |
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549 |
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550 int |
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551 rmdir (const std::string& name, std::string& msg) |
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552 { |
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553 msg = ""; |
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554 |
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555 int status = -1; |
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|
556 |
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557 status = gnulib::rmdir (name.c_str ()); |
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558 |
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559 if (status < 0) |
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560 msg = gnulib::strerror (errno); |
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561 |
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562 return status; |
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|
563 } |
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564 |
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565 // And a version that works recursively. |
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566 |
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567 int |
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568 recursive_rmdir (const std::string& name) |
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569 { |
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570 std::string msg; |
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571 return recursive_rmdir (name, msg); |
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572 } |
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573 |
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574 int |
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575 recursive_rmdir (const std::string& name, std::string& msg) |
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576 { |
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577 msg = ""; |
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578 |
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579 int status = 0; |
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580 |
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581 dir_entry dir (name); |
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582 |
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583 if (dir) |
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584 { |
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585 string_vector dirlist = dir.read (); |
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586 |
21733
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587 for (octave_idx_type i = 0; i < dirlist.numel (); i++) |
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588 { |
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589 octave_quit (); |
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590 |
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591 std::string nm = dirlist[i]; |
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592 |
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593 // Skip current directory and parent. |
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594 if (nm == "." || nm == "..") |
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595 continue; |
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596 |
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597 std::string fullnm = name + octave::sys::file_ops::dir_sep_str () + nm; |
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598 |
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599 // Get info about the file. Don't follow links. |
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600 file_stat fs (fullnm, false); |
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601 |
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|
602 if (fs) |
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|
603 { |
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604 if (fs.is_dir ()) |
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605 { |
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606 status = recursive_rmdir (fullnm, msg); |
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607 |
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|
608 if (status < 0) |
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|
609 break; |
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610 } |
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611 else |
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612 { |
cb0fdd941d84
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613 status = unlink (fullnm, msg); |
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614 |
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615 if (status < 0) |
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616 break; |
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617 } |
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618 } |
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619 else |
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620 { |
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621 msg = fs.error (); |
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622 break; |
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623 } |
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624 } |
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625 |
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626 if (status >= 0) |
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627 { |
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628 dir.close (); |
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629 status = rmdir (name, msg); |
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630 } |
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631 } |
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632 else |
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633 { |
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634 status = -1; |
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635 |
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636 msg = dir.error (); |
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637 } |
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|
638 |
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639 return status; |
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640 } |
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|
641 |
cb0fdd941d84
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|
642 int |
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|
643 umask (mode_t mode) |
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diff
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|
644 { |
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645 #if defined (HAVE_UMASK) |
cb0fdd941d84
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646 return umask (mode); |
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|
647 #else |
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|
648 return 0; |
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|
649 #endif |
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650 } |
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|
651 |
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652 int |
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653 unlink (const std::string& name) |
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654 { |
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|
655 std::string msg; |
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|
656 return unlink (name, msg); |
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|
657 } |
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|
658 |
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|
659 int |
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660 unlink (const std::string& name, std::string& msg) |
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661 { |
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662 msg = ""; |
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|
663 |
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664 int status = -1; |
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665 |
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666 status = gnulib::unlink (name.c_str ()); |
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667 |
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668 if (status < 0) |
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669 msg = gnulib::strerror (errno); |
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|
670 |
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|
671 return status; |
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|
672 } |
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|
673 |
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|
674 std::string |
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675 tempnam (const std::string& dir, const std::string& pfx) |
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676 { |
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677 std::string msg; |
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|
678 return tempnam (dir, pfx, msg); |
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679 } |
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|
680 |
21733
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|
681 std::string |
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|
682 tempnam (const std::string& dir, const std::string& pfx, |
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683 std::string& msg) |
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|
684 { |
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|
685 msg = ""; |
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686 |
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|
687 std::string retval; |
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|
688 |
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|
689 // get dir path to use for template |
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|
690 std::string templatename; |
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|
691 if (dir.empty ()) |
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|
692 templatename = octave::sys::env::get_temp_directory (); |
cb0fdd941d84
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|
693 else if (! file_stat (dir, false).is_dir ()) |
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|
694 templatename = octave::sys::env::get_temp_directory (); |
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695 else |
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696 templatename = dir; |
11586
12df7854fa7c
strip trailing whitespace from source files
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697 |
21733
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698 // add dir sep char if it is not there |
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699 if (*templatename.rbegin () != octave::sys::file_ops::dir_sep_char ()) |
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700 templatename += octave::sys::file_ops::dir_sep_char (); |
19420
82f2a3437e02
Fix tempname so it prioritizes user input dir rather than TMPDIR (bug #43844).
Rik <rik@octave.org>
parents:
18412
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701 |
21733
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702 if (pfx.empty ()) |
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703 templatename += "file"; |
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704 else |
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705 templatename += pfx; |
19458
d8fd3842a507
Use gnulib gen_tempname to create temporary names (Bug #43872).
John Donoghue <john.donoghue@ieee.org>
parents:
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diff
changeset
|
706 |
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707 // add the required XXXXXX for the template |
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708 templatename += "XXXXXX"; |
19428
eee9f111c164
Check if tempfile name exists when changing path of temporary file name (Bug #43872)
John Donoghue
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19420
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709 |
21733
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710 // create and copy template to char array for call to gen_tempname |
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711 char tname [templatename.length () + 1]; |
19597
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diff
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|
712 |
21733
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713 strcpy (tname, templatename.c_str ()); |
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714 |
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715 if (gen_tempname (tname, 0, 0, GT_NOCREATE) == -1) |
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716 msg = gnulib::strerror (errno); |
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717 else |
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718 retval = tname; |
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719 |
21733
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720 return retval; |
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721 } |
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|
722 |
21733
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723 std::string |
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724 canonicalize_file_name (const std::string& name) |
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725 { |
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|
726 std::string msg; |
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727 return canonicalize_file_name (name, msg); |
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728 } |
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|
729 |
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diff
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|
730 std::string |
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|
731 canonicalize_file_name (const std::string& name, std::string& msg) |
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|
732 { |
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733 msg = ""; |
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|
734 |
cb0fdd941d84
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735 std::string retval; |
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|
736 |
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737 char *tmp = gnulib::canonicalize_file_name (name.c_str ()); |
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|
738 |
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|
739 if (tmp) |
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|
740 { |
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|
741 retval = tmp; |
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|
742 free (tmp); |
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|
743 } |
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diff
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|
744 |
20503
0829b6ff3ac9
Use backslash as windows file separator for canonicalize_file_name (Bug #45816).
Rik <rik@octave.org>
parents:
19697
diff
changeset
|
745 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
21733
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|
746 // Canonical Windows file separator is backslash. |
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|
747 std::replace (retval.begin (), retval.end (), '/', '\\'); |
20503
0829b6ff3ac9
Use backslash as windows file separator for canonicalize_file_name (Bug #45816).
Rik <rik@octave.org>
parents:
19697
diff
changeset
|
748 #endif |
0829b6ff3ac9
Use backslash as windows file separator for canonicalize_file_name (Bug #45816).
Rik <rik@octave.org>
parents:
19697
diff
changeset
|
749 |
21733
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|
750 if (retval.empty ()) |
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|
751 msg = gnulib::strerror (errno); |
10252
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John W. Eaton <jwe@octave.org>
parents:
10250
diff
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|
752 |
21733
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diff
changeset
|
753 return retval; |
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diff
changeset
|
754 } |
cb0fdd941d84
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John W. Eaton <jwe@octave.org>
parents:
21732
diff
changeset
|
755 } |
10252
2fcc927a8757
liboctave/file-ops.h: avoid gnulib #define for canonicalize_file_name
John W. Eaton <jwe@octave.org>
parents:
10250
diff
changeset
|
756 } |