Mercurial > hg > octave-nkf
annotate liboctave/file-ops.cc @ 10172:96ed9db3345c
provide wrappers for mkdir and mkfifo
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 21 Jan 2010 04:02:29 -0500 |
| parents | 1dffc8b2fca7 |
| children | 2b1f3f156aaf |
| rev | line source |
|---|---|
| 1765 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
| 8920 | 4 2007, 2008 John W. Eaton |
| 1765 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1765 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1765 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 28 #include <cerrno> | |
| 1802 | 29 #include <cstdio> |
| 30 #include <cstdlib> | |
| 1765 | 31 #include <cstring> |
| 32 | |
| 3503 | 33 #include <iostream> |
| 4726 | 34 #include <vector> |
| 3040 | 35 |
| 2443 | 36 #ifdef HAVE_SYS_TYPES_H |
| 1765 | 37 #include <sys/types.h> |
| 2443 | 38 #endif |
| 2926 | 39 |
| 40 #ifdef HAVE_UNISTD_H | |
| 1765 | 41 #include <unistd.h> |
| 42 #endif | |
| 43 | |
| 5476 | 44 #include "dir-ops.h" |
| 1765 | 45 #include "file-ops.h" |
| 5476 | 46 #include "file-stat.h" |
| 2926 | 47 #include "oct-env.h" |
| 2934 | 48 #include "oct-passwd.h" |
| 3710 | 49 #include "pathlen.h" |
| 5476 | 50 #include "quit.h" |
| 1775 | 51 #include "statdefs.h" |
| 2926 | 52 #include "str-vec.h" |
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53 #include "oct-locbuf.h" |
| 1765 | 54 |
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55 file_ops::static_members *file_ops::static_members::instance = 0; |
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56 |
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57 file_ops::static_members::static_members (void) |
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58 : |
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59 #if (defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM)) |
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60 xdir_sep_char ('\\'), |
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61 xdir_sep_str ("\\"), |
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62 #else |
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63 xdir_sep_char ('/'), |
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64 xdir_sep_str ("/"), |
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65 #endif |
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66 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) |
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67 xdir_sep_chars ("/\\") |
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68 #else |
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69 xdir_sep_chars (xdir_sep_str) |
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70 #endif |
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71 { } |
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72 |
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73 bool |
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74 file_ops::static_members::instance_ok (void) |
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75 { |
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76 bool retval = true; |
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77 |
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78 if (! instance) |
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79 instance = new static_members (); |
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80 |
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81 if (! instance) |
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82 { |
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83 (*current_liboctave_error_handler) |
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84 ("unable to create file_ops::static_members object!"); |
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85 |
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86 retval = false; |
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87 } |
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88 |
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89 return retval; |
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90 } |
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91 |
| 2937 | 92 #define NOT_SUPPORTED(nm) \ |
| 4062 | 93 nm ": not supported on this system" |
| 2937 | 94 |
| 2433 | 95 // We provide a replacement for mkdir(). |
| 96 | |
| 1765 | 97 int |
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98 file_ops::mkdir (const std::string& nm, mode_t md) |
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99 { |
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100 std::string msg; |
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101 return mkdir (nm, md, msg); |
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102 } |
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103 |
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104 int |
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105 file_ops::mkdir (const std::string& name, mode_t mode, std::string& msg) |
| 2668 | 106 { |
| 3504 | 107 msg = std::string (); |
| 2668 | 108 |
| 2937 | 109 int status = -1; |
| 110 | |
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111 status = octave_mkdir (name.c_str (), mode); |
| 2668 | 112 |
| 113 if (status < 0) | |
| 3504 | 114 { |
| 115 using namespace std; | |
| 116 msg = ::strerror (errno); | |
| 117 } | |
| 2668 | 118 |
| 119 return status; | |
| 120 } | |
| 121 | |
| 2433 | 122 // I don't know how to emulate this on systems that don't provide it. |
| 123 | |
| 1765 | 124 int |
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125 file_ops::mkfifo (const std::string& nm, mode_t md) |
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126 { |
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127 std::string msg; |
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128 return mkfifo (nm, md, msg); |
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129 } |
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130 |
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131 int |
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132 file_ops::mkfifo (const std::string& name, mode_t mode, std::string& msg) |
| 2668 | 133 { |
| 3504 | 134 msg = std::string (); |
| 2668 | 135 |
| 2937 | 136 int status = -1; |
| 137 | |
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138 // With gnulib we will always have mkfifo, but some systems like MinGW |
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139 // don't have working mkfifo functions. On those systems, mkfifo will |
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140 // always return -1 and set errno. |
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141 |
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142 status = octave_mkfifo (name.c_str (), mode); |
| 2668 | 143 |
| 144 if (status < 0) | |
| 3504 | 145 { |
| 146 using namespace std; | |
| 147 msg = ::strerror (errno); | |
| 148 } | |
| 2668 | 149 |
| 150 return status; | |
| 151 } | |
| 152 | |
| 3710 | 153 // I don't know how to emulate this on systems that don't provide it. |
| 154 | |
| 155 int | |
| 156 file_ops::link (const std::string& old_name, const std::string& new_name) | |
| 157 { | |
| 158 std::string msg; | |
| 159 return link (old_name, new_name, msg); | |
| 160 } | |
| 161 | |
| 162 int | |
| 163 file_ops::link (const std::string& old_name, | |
| 164 const std::string& new_name, std::string& msg) | |
| 165 { | |
| 166 msg = std::string (); | |
| 167 | |
| 168 int status = -1; | |
| 169 | |
| 170 #if defined (HAVE_LINK) | |
| 171 status = ::link (old_name.c_str (), new_name.c_str ()); | |
| 172 | |
| 173 if (status < 0) | |
| 174 { | |
| 175 using namespace std; | |
| 176 msg = ::strerror (errno); | |
| 177 } | |
| 178 #else | |
| 179 msg = NOT_SUPPORTED ("link"); | |
| 180 #endif | |
| 181 | |
| 182 return status; | |
| 183 } | |
| 184 | |
| 185 // I don't know how to emulate this on systems that don't provide it. | |
| 186 | |
| 187 int | |
| 188 file_ops::symlink (const std::string& old_name, const std::string& new_name) | |
| 189 { | |
| 190 std::string msg; | |
| 191 return symlink (old_name, new_name, msg); | |
| 192 } | |
| 193 | |
| 194 int | |
| 195 file_ops::symlink (const std::string& old_name, | |
| 196 const std::string& new_name, std::string& msg) | |
| 197 { | |
| 198 msg = std::string (); | |
| 199 | |
| 200 int status = -1; | |
| 201 | |
| 202 #if defined (HAVE_SYMLINK) | |
| 4577 | 203 |
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204 status = ::symlink (old_name.c_str (), new_name.c_str ()); |
| 3710 | 205 |
| 206 if (status < 0) | |
| 207 { | |
| 208 using namespace std; | |
| 209 msg = ::strerror (errno); | |
| 210 } | |
| 211 #else | |
| 212 msg = NOT_SUPPORTED ("symlink"); | |
| 213 #endif | |
| 214 | |
| 215 return status; | |
| 216 } | |
| 217 | |
| 218 // We provide a replacement for rename(). | |
| 219 | |
| 220 int | |
| 221 file_ops::readlink (const std::string& path, std::string& result) | |
| 222 { | |
| 223 std::string msg; | |
| 224 return readlink (path, result, msg); | |
| 225 } | |
| 226 | |
| 227 int | |
| 228 file_ops::readlink (const std::string& path, std::string& result, | |
| 229 std::string& msg) | |
| 230 { | |
| 231 int status = -1; | |
| 232 | |
| 233 msg = std::string (); | |
| 234 | |
| 4066 | 235 #if defined (HAVE_READLINK) |
| 3710 | 236 char buf[MAXPATHLEN+1]; |
| 237 | |
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238 status = ::readlink (path.c_str (), buf, MAXPATHLEN); |
| 3710 | 239 |
| 240 if (status < 0) | |
| 241 { | |
| 242 using namespace std; | |
| 243 msg = ::strerror (errno); | |
| 244 } | |
| 245 else | |
| 246 { | |
| 247 buf[status] = '\0'; | |
| 3769 | 248 result = std::string (buf); |
| 3710 | 249 status = 0; |
| 250 } | |
| 251 #else | |
| 252 msg = NOT_SUPPORTED ("rename"); | |
| 253 #endif | |
| 254 | |
| 255 return status; | |
| 256 } | |
| 257 | |
| 2433 | 258 // We provide a replacement for rename(). |
| 259 | |
| 1765 | 260 int |
| 3504 | 261 file_ops::rename (const std::string& from, const std::string& to) |
| 1765 | 262 { |
| 3504 | 263 std::string msg; |
| 2937 | 264 return rename (from, to, msg); |
| 1765 | 265 } |
| 266 | |
| 2668 | 267 int |
| 3504 | 268 file_ops::rename (const std::string& from, const std::string& to, |
| 269 std::string& msg) | |
| 2668 | 270 { |
| 2937 | 271 int status = -1; |
| 272 | |
| 3504 | 273 msg = std::string (); |
| 2668 | 274 |
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275 status = octave_rename (from.c_str (), to.c_str ()); |
| 2668 | 276 |
| 277 if (status < 0) | |
| 3504 | 278 { |
| 279 using namespace std; | |
| 280 msg = ::strerror (errno); | |
| 281 } | |
| 2668 | 282 |
| 283 return status; | |
| 284 } | |
| 285 | |
| 2433 | 286 // We provide a replacement for rmdir(). |
| 287 | |
| 1765 | 288 int |
| 3504 | 289 file_ops::rmdir (const std::string& name) |
| 1765 | 290 { |
| 3504 | 291 std::string msg; |
| 2937 | 292 return rmdir (name, msg); |
| 1765 | 293 } |
| 294 | |
| 2668 | 295 int |
| 3504 | 296 file_ops::rmdir (const std::string& name, std::string& msg) |
| 2668 | 297 { |
| 3504 | 298 msg = std::string (); |
| 2668 | 299 |
| 2937 | 300 int status = -1; |
| 301 | |
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302 status = octave_rmdir (name.c_str ()); |
| 2668 | 303 |
| 304 if (status < 0) | |
| 3504 | 305 { |
| 306 using namespace std; | |
| 307 msg = ::strerror (errno); | |
| 308 } | |
| 2668 | 309 |
| 310 return status; | |
| 311 } | |
| 312 | |
| 5476 | 313 // And a version that works recursively. |
| 314 | |
| 315 int | |
| 316 file_ops::recursive_rmdir (const std::string& name) | |
| 317 { | |
| 318 std::string msg; | |
| 319 return recursive_rmdir (name, msg); | |
| 320 } | |
| 321 | |
| 322 int | |
| 323 file_ops::recursive_rmdir (const std::string& name, std::string& msg) | |
| 324 { | |
| 325 msg = std::string (); | |
| 326 | |
| 327 int status = 0; | |
| 328 | |
| 329 dir_entry dir (name); | |
| 330 | |
| 331 if (dir) | |
| 332 { | |
| 333 string_vector dirlist = dir.read (); | |
| 334 | |
| 335 for (octave_idx_type i = 0; i < dirlist.length (); i++) | |
| 336 { | |
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337 octave_quit (); |
| 5476 | 338 |
| 339 std::string nm = dirlist[i]; | |
| 340 | |
| 341 // Skip current directory and parent. | |
| 342 if (nm == "." || nm == "..") | |
| 343 continue; | |
| 344 | |
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345 std::string fullnm = name + file_ops::dir_sep_str () + nm; |
| 5476 | 346 |
| 347 // Get info about the file. Don't follow links. | |
| 348 file_stat fs (fullnm, false); | |
| 349 | |
| 350 if (fs) | |
| 351 { | |
| 352 if (fs.is_dir ()) | |
| 353 { | |
| 354 status = recursive_rmdir (fullnm, msg); | |
| 355 | |
| 356 if (status < 0) | |
| 357 break; | |
| 358 } | |
| 359 else | |
| 360 { | |
| 361 status = unlink (fullnm, msg); | |
| 362 | |
| 363 if (status < 0) | |
| 364 break; | |
| 365 } | |
| 366 } | |
| 367 else | |
| 368 { | |
| 369 msg = fs.error (); | |
| 370 break; | |
| 371 } | |
| 372 } | |
| 373 | |
| 374 if (status >= 0) | |
| 6363 | 375 { |
| 376 dir.close (); | |
| 377 status = file_ops::rmdir (name, msg); | |
| 378 } | |
| 5476 | 379 } |
| 380 else | |
| 381 { | |
| 382 status = -1; | |
| 383 | |
| 384 msg = dir.error (); | |
| 385 } | |
| 386 | |
| 387 return status; | |
| 388 } | |
| 389 | |
| 5138 | 390 std::string |
| 391 file_ops::canonicalize_file_name (const std::string& name) | |
| 392 { | |
| 393 std::string msg; | |
| 394 return canonicalize_file_name (name, msg); | |
| 395 } | |
| 396 | |
| 397 std::string | |
| 398 file_ops::canonicalize_file_name (const std::string& name, std::string& msg) | |
| 399 { | |
| 400 msg = std::string (); | |
| 401 | |
| 402 std::string retval; | |
| 403 | |
| 404 #if defined (HAVE_CANONICALIZE_FILE_NAME) | |
| 405 | |
| 406 char *tmp = ::canonicalize_file_name (name.c_str ()); | |
| 407 | |
| 408 if (tmp) | |
| 409 { | |
| 410 retval = tmp; | |
| 411 ::free (tmp); | |
| 412 } | |
| 413 | |
| 414 #elif defined (HAVE_RESOLVEPATH) | |
| 415 | |
| 416 #if !defined (errno) | |
| 417 extern int errno; | |
| 418 #endif | |
| 419 | |
| 420 #if !defined (__set_errno) | |
| 421 # define __set_errno(Val) errno = (Val) | |
| 422 #endif | |
| 423 | |
| 424 if (name.empty ()) | |
| 425 { | |
| 426 __set_errno (ENOENT); | |
| 427 return retval; | |
| 428 } | |
| 429 | |
| 430 // All known hosts with resolvepath (e.g. Solaris 7) don't turn | |
| 431 // relative names into absolute ones, so prepend the working | |
| 432 // directory if the path is not absolute. | |
| 433 | |
| 5149 | 434 std::string absolute_name |
| 435 = octave_env::make_absolute (name, octave_env::getcwd ()); | |
| 5138 | 436 |
| 5149 | 437 size_t resolved_size = absolute_name.length (); |
| 5138 | 438 |
| 6208 | 439 while (true) |
| 5138 | 440 { |
| 441 resolved_size = 2 * resolved_size + 1; | |
| 442 | |
| 443 OCTAVE_LOCAL_BUFFER (char, resolved, resolved_size); | |
| 444 | |
| 5149 | 445 int resolved_len |
| 446 = ::resolvepath (absolute_name.c_str (), resolved, resolved_size); | |
| 5138 | 447 |
| 448 if (resolved_len < 0) | |
| 449 break; | |
| 450 | |
| 451 if (resolved_len < resolved_size) | |
| 452 { | |
| 453 retval = resolved; | |
| 454 break; | |
| 455 } | |
| 456 } | |
| 457 | |
| 6208 | 458 #elif defined (__WIN32__) |
| 459 | |
| 460 int n = 1024; | |
| 461 | |
| 462 std::string win_path (n, '\0'); | |
| 463 | |
| 464 while (true) | |
| 465 { | |
| 7520 | 466 int status = GetFullPathName (name.c_str (), n, &win_path[0], 0); |
| 6208 | 467 |
| 468 if (status == 0) | |
| 469 break; | |
| 470 else if (status < n) | |
| 471 { | |
| 472 win_path.resize (status); | |
| 473 retval = win_path; | |
| 474 break; | |
| 475 } | |
| 476 else | |
| 477 { | |
| 478 n *= 2; | |
| 479 win_path.resize (n); | |
| 480 } | |
| 481 } | |
| 482 | |
| 6271 | 483 #elif defined (HAVE_REALPATH) |
| 484 | |
| 485 #if !defined (__set_errno) | |
| 486 # define __set_errno(Val) errno = (Val) | |
| 487 #endif | |
| 488 | |
| 489 if (name.empty ()) | |
| 490 { | |
| 491 __set_errno (ENOENT); | |
| 492 return retval; | |
| 493 } | |
| 494 | |
| 495 OCTAVE_LOCAL_BUFFER (char, buf, PATH_MAX); | |
| 496 | |
| 6273 | 497 if (::realpath (name.c_str (), buf)) |
| 498 retval = buf; | |
| 6271 | 499 |
| 5138 | 500 #else |
| 501 | |
| 5775 | 502 // FIXME -- provide replacement here... |
| 5138 | 503 retval = name; |
| 504 | |
| 505 #endif | |
| 506 | |
| 507 if (retval.empty ()) | |
| 508 { | |
| 509 using namespace std; | |
| 510 msg = ::strerror (errno); | |
| 511 } | |
| 512 | |
| 513 return retval; | |
| 514 } | |
| 515 | |
| 2433 | 516 // We provide a replacement for tempnam(). |
| 517 | |
| 3504 | 518 std::string |
| 519 file_ops::tempnam (const std::string& dir, const std::string& pfx) | |
| 1802 | 520 { |
| 3504 | 521 std::string msg; |
| 2937 | 522 return tempnam (dir, pfx, msg); |
| 523 } | |
| 524 | |
| 3504 | 525 std::string |
| 526 file_ops::tempnam (const std::string& dir, const std::string& pfx, | |
| 527 std::string& msg) | |
| 2937 | 528 { |
| 3504 | 529 msg = std::string (); |
| 2937 | 530 |
| 3504 | 531 std::string retval; |
| 2937 | 532 |
| 533 const char *pdir = dir.empty () ? 0 : dir.c_str (); | |
| 1802 | 534 |
| 2937 | 535 const char *ppfx = pfx.empty () ? 0 : pfx.c_str (); |
| 536 | |
| 537 char *tmp = ::tempnam (pdir, ppfx); | |
| 1802 | 538 |
| 539 if (tmp) | |
| 540 { | |
| 541 retval = tmp; | |
| 542 | |
| 2937 | 543 ::free (tmp); |
| 1802 | 544 } |
| 545 else | |
| 3504 | 546 { |
| 547 using namespace std; | |
| 548 msg = ::strerror (errno); | |
| 549 } | |
| 1802 | 550 |
| 551 return retval; | |
| 552 } | |
| 553 | |
| 3040 | 554 // The following tilde-expansion code was stolen and adapted from |
| 555 // readline. | |
| 2926 | 556 |
| 3040 | 557 // The default value of tilde_additional_prefixes. This is set to |
| 558 // whitespace preceding a tilde so that simple programs which do not | |
| 559 // perform any word separation get desired behaviour. | |
| 560 static const char *default_prefixes[] = { " ~", "\t~", ":~", 0 }; | |
| 561 | |
| 562 // The default value of tilde_additional_suffixes. This is set to | |
| 563 // whitespace or newline so that simple programs which do not perform | |
| 564 // any word separation get desired behaviour. | |
| 565 static const char *default_suffixes[] = { " ", "\n", ":", 0 }; | |
| 566 | |
| 567 // If non-null, this contains the address of a function that the | |
| 568 // application wants called before trying the standard tilde | |
| 569 // expansions. The function is called with the text sans tilde, and | |
| 570 // returns a malloc()'ed string which is the expansion, or a NULL | |
| 571 // pointer if the expansion fails. | |
| 572 file_ops::tilde_expansion_hook file_ops::tilde_expansion_preexpansion_hook = 0; | |
| 573 | |
| 574 // If non-null, this contains the address of a function to call if the | |
| 575 // standard meaning for expanding a tilde fails. The function is | |
| 576 // called with the text (sans tilde, as in "foo"), and returns a | |
| 577 // malloc()'ed string which is the expansion, or a NULL pointer if | |
| 578 // there is no expansion. | |
| 579 file_ops::tilde_expansion_hook file_ops::tilde_expansion_failure_hook = 0; | |
| 580 | |
| 581 // When non-null, this is a NULL terminated array of strings which are | |
| 582 // duplicates for a tilde prefix. Bash uses this to expand `=~' and | |
| 583 // `:~'. | |
| 584 string_vector file_ops::tilde_additional_prefixes = default_prefixes; | |
| 585 | |
| 586 // When non-null, this is a NULL terminated array of strings which | |
| 587 // match the end of a username, instead of just "/". Bash sets this | |
| 588 // to `:' and `=~'. | |
| 589 string_vector file_ops::tilde_additional_suffixes = default_suffixes; | |
| 590 | |
| 591 // Find the start of a tilde expansion in S, and return the index | |
| 592 // of the tilde which starts the expansion. Place the length of the | |
| 593 // text which identified this tilde starter in LEN, excluding the | |
| 594 // tilde itself. | |
| 595 | |
| 596 static size_t | |
| 3504 | 597 tilde_find_prefix (const std::string& s, size_t& len) |
| 3040 | 598 { |
| 599 len = 0; | |
| 600 | |
| 601 size_t s_len = s.length (); | |
| 602 | |
| 603 if (s_len == 0 || s[0] == '~') | |
| 604 return 0; | |
| 605 | |
| 606 string_vector prefixes = file_ops::tilde_additional_prefixes; | |
| 607 | |
| 608 if (! prefixes.empty ()) | |
| 609 { | |
| 610 for (size_t i = 0; i < s_len; i++) | |
| 611 { | |
| 612 for (int j = 0; j < prefixes.length (); j++) | |
| 613 { | |
| 614 size_t pfx_len = prefixes[j].length (); | |
| 615 | |
| 616 if (prefixes[j].compare (s.substr (i, pfx_len)) == 0) | |
| 617 { | |
| 618 len = pfx_len - 1; | |
| 619 return i + len; | |
| 620 } | |
| 621 } | |
| 622 } | |
| 623 } | |
| 624 | |
| 625 return s_len; | |
| 626 } | |
| 627 | |
| 628 // Find the end of a tilde expansion in S, and return the index | |
| 629 // of the character which ends the tilde definition. | |
| 630 | |
| 631 static size_t | |
| 3504 | 632 tilde_find_suffix (const std::string& s) |
| 3040 | 633 { |
| 634 size_t s_len = s.length (); | |
| 635 | |
| 636 string_vector suffixes = file_ops::tilde_additional_suffixes; | |
| 637 | |
| 638 size_t i = 0; | |
| 639 | |
| 640 for ( ; i < s_len; i++) | |
| 641 { | |
| 6694 | 642 if (file_ops::is_dir_sep (s[i])) |
| 3040 | 643 break; |
| 644 | |
| 645 if (! suffixes.empty ()) | |
| 646 { | |
| 647 for (int j = 0; j < suffixes.length (); j++) | |
| 648 { | |
| 649 size_t sfx_len = suffixes[j].length (); | |
| 650 | |
| 651 if (suffixes[j].compare (s.substr (i, sfx_len)) == 0) | |
| 652 return i; | |
| 653 } | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 return i; | |
| 658 } | |
| 659 | |
| 660 // Take FNAME and return the tilde prefix we want expanded. | |
| 661 | |
| 3504 | 662 static std::string |
| 663 isolate_tilde_prefix (const std::string& fname) | |
| 3040 | 664 { |
| 665 size_t f_len = fname.length (); | |
| 666 | |
| 667 size_t len = 1; | |
| 668 | |
| 6694 | 669 while (len < f_len && ! file_ops::is_dir_sep (fname[len])) |
| 3040 | 670 len++; |
| 671 | |
| 672 return fname.substr (1, len); | |
| 673 } | |
| 674 | |
| 675 // Do the work of tilde expansion on FILENAME. FILENAME starts with a | |
| 676 // tilde. | |
| 677 | |
| 3504 | 678 static std::string |
| 679 tilde_expand_word (const std::string& filename) | |
| 3040 | 680 { |
| 681 size_t f_len = filename.length (); | |
| 682 | |
| 683 if (f_len == 0 || filename[0] != '~') | |
| 684 return filename; | |
| 685 | |
| 686 // A leading `~/' or a bare `~' is *always* translated to the value | |
| 687 // of $HOME or the home directory of the current user, regardless of | |
| 688 // any preexpansion hook. | |
| 689 | |
| 6694 | 690 if (f_len == 1 || file_ops::is_dir_sep (filename[1])) |
| 3040 | 691 return octave_env::get_home_directory () + filename.substr (1); |
| 692 | |
| 3504 | 693 std::string username = isolate_tilde_prefix (filename); |
| 3040 | 694 |
| 695 size_t user_len = username.length (); | |
| 696 | |
| 3504 | 697 std::string dirname; |
| 3040 | 698 |
| 699 if (file_ops::tilde_expansion_preexpansion_hook) | |
| 700 { | |
| 3504 | 701 std::string expansion |
| 3040 | 702 = file_ops::tilde_expansion_preexpansion_hook (username); |
| 703 | |
| 704 if (! expansion.empty ()) | |
| 3074 | 705 return expansion + filename.substr (user_len+1); |
| 3040 | 706 } |
| 707 | |
| 708 // No preexpansion hook, or the preexpansion hook failed. Look in the | |
| 709 // password database. | |
| 710 | |
| 711 octave_passwd pw = octave_passwd::getpwnam (username); | |
| 712 | |
| 713 if (! pw) | |
| 714 { | |
| 715 // If the calling program has a special syntax for expanding tildes, | |
| 716 // and we couldn't find a standard expansion, then let them try. | |
| 717 | |
| 718 if (file_ops::tilde_expansion_failure_hook) | |
| 719 { | |
| 3504 | 720 std::string expansion |
| 3040 | 721 = file_ops::tilde_expansion_failure_hook (username); |
| 722 | |
| 723 if (! expansion.empty ()) | |
| 3074 | 724 dirname = expansion + filename.substr (user_len+1); |
| 3040 | 725 } |
| 726 | |
| 727 // If we don't have a failure hook, or if the failure hook did not | |
| 728 // expand the tilde, return a copy of what we were passed. | |
| 729 | |
| 730 if (dirname.length () == 0) | |
| 731 dirname = filename; | |
| 732 } | |
| 733 else | |
| 3074 | 734 dirname = pw.dir () + filename.substr (user_len+1); |
| 3040 | 735 |
| 736 return dirname; | |
| 737 } | |
| 738 | |
| 739 // If NAME has a leading ~ or ~user, Unix-style, expand it to the | |
| 740 // user's home directory. If no ~, or no <pwd.h>, just return NAME. | |
| 741 | |
| 3504 | 742 std::string |
| 743 file_ops::tilde_expand (const std::string& name) | |
| 2926 | 744 { |
|
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745 if (name.find ('~') == std::string::npos) |
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746 return name; |
|
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747 else |
| 3040 | 748 { |
|
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749 std::string result; |
|
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750 |
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751 size_t name_len = name.length (); |
| 2926 | 752 |
|
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753 // Scan through S expanding tildes as we come to them. |
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754 |
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755 size_t pos = 0; |
| 3040 | 756 |
|
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757 while (1) |
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758 { |
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759 if (pos > name_len) |
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760 break; |
| 3040 | 761 |
|
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762 size_t len; |
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763 |
|
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764 // Make START point to the tilde which starts the expansion. |
| 2926 | 765 |
|
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766 size_t start = tilde_find_prefix (name.substr (pos), len); |
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767 |
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768 result.append (name.substr (pos, start)); |
| 3040 | 769 |
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770 // Advance STRING to the starting tilde. |
| 2926 | 771 |
|
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772 pos += start; |
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773 |
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774 // Make FINI be the index of one after the last character of the |
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775 // username. |
| 2926 | 776 |
|
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777 size_t fini = tilde_find_suffix (name.substr (pos)); |
| 2926 | 778 |
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779 // If both START and FINI are zero, we are all done. |
| 2926 | 780 |
|
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781 if (! (start || fini)) |
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782 break; |
| 2926 | 783 |
|
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784 // Expand the entire tilde word, and copy it into RESULT. |
| 2947 | 785 |
|
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786 std::string tilde_word = name.substr (pos, fini); |
| 3040 | 787 |
|
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788 pos += fini; |
| 2926 | 789 |
|
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790 std::string expansion = tilde_expand_word (tilde_word); |
| 3040 | 791 |
|
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792 result.append (expansion); |
|
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793 } |
|
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|
794 |
|
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|
795 return result; |
| 2926 | 796 } |
| 797 } | |
| 798 | |
| 799 // A vector version of the above. | |
| 800 | |
| 801 string_vector | |
| 802 file_ops::tilde_expand (const string_vector& names) | |
| 803 { | |
| 804 string_vector retval; | |
| 805 | |
| 806 int n = names.length (); | |
| 807 | |
| 808 retval.resize (n); | |
| 809 | |
| 810 for (int i = 0; i < n; i++) | |
| 811 retval[i] = file_ops::tilde_expand (names[i]); | |
| 812 | |
| 813 return retval; | |
| 814 } | |
| 1802 | 815 |
| 1765 | 816 int |
| 2926 | 817 file_ops::umask (mode_t mode) |
| 1765 | 818 { |
| 819 #if defined (HAVE_UMASK) | |
| 2926 | 820 return ::umask (mode); |
| 1765 | 821 #else |
| 822 return 0; | |
| 823 #endif | |
| 824 } | |
| 825 | |
| 1773 | 826 int |
| 3504 | 827 file_ops::unlink (const std::string& name) |
| 1773 | 828 { |
| 3504 | 829 std::string msg; |
| 2937 | 830 return unlink (name, msg); |
| 1773 | 831 } |
| 832 | |
| 2668 | 833 int |
| 3504 | 834 file_ops::unlink (const std::string& name, std::string& msg) |
| 2668 | 835 { |
| 3504 | 836 msg = std::string (); |
| 2668 | 837 |
| 2937 | 838 int status = -1; |
| 839 | |
| 840 #if defined (HAVE_UNLINK) | |
| 841 status = ::unlink (name.c_str ()); | |
| 2668 | 842 |
| 843 if (status < 0) | |
| 3504 | 844 { |
| 845 using namespace std; | |
| 846 msg = ::strerror (errno); | |
| 847 } | |
| 2937 | 848 #else |
| 849 msg = NOT_SUPPORTED ("unlink"); | |
| 850 #endif | |
| 2668 | 851 |
| 852 return status; | |
| 853 } | |
| 854 | |
| 7272 | 855 std::string |
| 856 file_ops::concat (const std::string& dir, const std::string& file) | |
| 857 { | |
| 858 return dir.empty () | |
| 859 ? file | |
| 860 : (is_dir_sep (dir[dir.length()-1]) | |
| 861 ? dir + file | |
|
8007
a2ab20ba78f7
make file_ops a proper singleton class
John W. Eaton <jwe@octave.org>
parents:
7520
diff
changeset
|
862 : dir + file_ops::dir_sep_char () + file); |
| 7272 | 863 } |